GridLayoutManager.java revision aaeddd3d703a597945778a749fbef2d85532802d
189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project/* 289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Copyright (C) 2014 The Android Open Source Project 389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * in compliance with the License. You may obtain a copy of the License at 689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * 989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Unless required by applicable law or agreed to in writing, software distributed under the License 1089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 1189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * or implied. See the License for the specific language governing permissions and limitations under 1289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * the License. 1389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 1489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectpackage android.support.v17.leanback.widget; 1589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 1689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport android.animation.TimeAnimator; 1789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport android.content.Context; 1889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport android.graphics.Rect; 1989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport android.support.v7.widget.RecyclerView; 2089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport android.support.v7.widget.RecyclerView.Adapter; 2189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport android.support.v7.widget.RecyclerView.Recycler; 2289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport android.support.v7.widget.RecyclerView.State; 2389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 2489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport static android.support.v7.widget.RecyclerView.NO_ID; 2589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport static android.support.v7.widget.RecyclerView.NO_POSITION; 2689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport static android.support.v7.widget.RecyclerView.HORIZONTAL; 2789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport static android.support.v7.widget.RecyclerView.VERTICAL; 2889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 2989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport android.util.AttributeSet; 3089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport android.util.Log; 3189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport android.view.FocusFinder; 3289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport android.view.Gravity; 3389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport android.view.View; 3489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport android.view.ViewParent; 357562408b2261d38415453378b6188f74fda99d88Mathias Agopianimport android.view.View.MeasureSpec; 367562408b2261d38415453378b6188f74fda99d88Mathias Agopianimport android.view.ViewGroup.MarginLayoutParams; 3789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport android.view.ViewGroup; 3889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport android.view.animation.DecelerateInterpolator; 3989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport android.view.animation.Interpolator; 4089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 4189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport java.io.PrintWriter; 4289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Projectimport java.io.StringWriter; 4333005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yehimport java.util.ArrayList; 4433005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yehimport java.util.List; 4533005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh 4633005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yehfinal class GridLayoutManager extends RecyclerView.LayoutManager { 4733005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh 4833005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh /* 4933005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh * LayoutParams for {@link HorizontalGridView} and {@link VerticalGridView}. 5033005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh * The class currently does three internal jobs: 5133005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh * - Saves optical bounds insets. 5233005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh * - Caches focus align view center. 5333005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh * - Manages child view layout animation. 5433005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh */ 5533005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh static class LayoutParams extends RecyclerView.LayoutParams { 5633005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh 5733005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh // The view is saved only during animation. 5833005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh private View mView; 5933005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh 6033005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh // For placement 6133005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh private int mLeftInset; 6233005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh private int mTopInset; 6333005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh private int mRighInset; 6433005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh private int mBottomInset; 6533005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh 6633005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh // For alignment 6733005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh private int mAlignX; 6833005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh private int mAlignY; 6933005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh 7033005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh // For animations 7133005a932c60a0780fe9b7307d5988df3d9f6c26Chia-chi Yeh private TimeAnimator mAnimator; 7289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private long mDuration; 7389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private boolean mFirstAttached; 7489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // current virtual view position (scrollOffset + left/top) in the GridLayoutManager 7589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private int mViewX, mViewY; 7689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private int mSize; 7789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // animation start value of translation x and y 7889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private float mAnimationStartTranslationX, mAnimationStartTranslationY; 7989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 8089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // The direction this view should be laid out along the primary dimension. 8189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private boolean mLayoutForward; 8289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 8389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // Orientation of the grid layout 84c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent private int mOrientation; 8589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 8689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public LayoutParams(Context c, AttributeSet attrs) { 8789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project super(c, attrs); 8889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 89be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent 90be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent public LayoutParams(int width, int height) { 9189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project super(width, height); 9289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 93c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent 94a514bdb58b5de4986679f72b7204b4764f7a2778Eric Laurent public LayoutParams(MarginLayoutParams source) { 95a514bdb58b5de4986679f72b7204b4764f7a2778Eric Laurent super(source); 9689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 9789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 9889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public LayoutParams(ViewGroup.LayoutParams source) { 9989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project super(source); 10089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 10189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 102c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent public LayoutParams(RecyclerView.LayoutParams source) { 10389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project super(source); 10489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 10589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 10689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public LayoutParams(LayoutParams source) { 107be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent super(source); 108be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent } 10989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 11089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project void onViewAttached() { 111c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent endAnimate(); 112a514bdb58b5de4986679f72b7204b4764f7a2778Eric Laurent mFirstAttached = true; 113a514bdb58b5de4986679f72b7204b4764f7a2778Eric Laurent } 11489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 11589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project void onViewDetached() { 11689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project endAnimate(); 11789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 11889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 11989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int getAlignX() { 12089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return mAlignX; 12189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 12289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 12389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int getAlignY() { 12489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return mAlignY; 12589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 12689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 12789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int getOpticalLeft(View view) { 12889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return view.getLeft() + mLeftInset; 12989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 13089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 13189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int getOpticalTop(View view) { 13289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return view.getTop() + mTopInset; 13389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 13489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 13589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int getOpticalRight(View view) { 13689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return view.getRight() - mRighInset; 13789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 138c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent 13989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int getOpticalBottom(View view) { 14089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return view.getBottom() - mBottomInset; 14189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 14289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 14389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int getOpticalWidth(View view) { 14489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return view.getWidth() - mLeftInset - mRighInset; 145be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent } 146be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent 14789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int getOpticalHeight(View view) { 14889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return view.getHeight() - mTopInset - mBottomInset; 14989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 15089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 1511dd70b9f04961a06fcb73a97fca10a53b3245d3cEric Laurent void setAlignX(int alignX) { 15289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mAlignX = alignX; 15389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 15489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 15589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project void setAlignY(int alignY) { 15689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mAlignY = alignY; 15789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 15889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 15989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project void setOpticalInsets(int leftInset, int topInset, int rightInset, int bottomInset) { 16089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mLeftInset = leftInset; 16189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mTopInset = topInset; 16289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mRighInset = rightInset; 16389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mBottomInset = bottomInset; 16489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 16589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 16689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private TimeAnimator.TimeListener mTimeListener = new TimeAnimator.TimeListener() { 16789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project @Override 16889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public void onTimeUpdate(TimeAnimator animation, long totalTime, long deltaTime) { 16989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mView == null) { 17089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return; 17189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 17289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (totalTime >= mDuration) { 17389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project endAnimate(); 17489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else { 17589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project float fraction = (float) (totalTime / (double)mDuration); 176c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent float fractionToEnd = 1 - mAnimator 177c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent .getInterpolator().getInterpolation(fraction); 17889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mOrientation == HORIZONTAL) { 17989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mLayoutForward) { 18089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mView.setTranslationX(fractionToEnd * mAnimationStartTranslationX); 181c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } else { 18289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mView.setTranslationX(fractionToEnd * mAnimationStartTranslationX - 18389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project fractionToEnd * (mView.getMeasuredWidth() - mSize)); 18489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 185c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } else { 186c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent if (mLayoutForward) { 187c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent mView.setTranslationY(fractionToEnd * mAnimationStartTranslationY); 188c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } else { 189c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent mView.setTranslationY(fractionToEnd * mAnimationStartTranslationY - 190c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent fractionToEnd * (mView.getMeasuredHeight() - mSize)); 191c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } 192c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } 19389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project invalidateItemDecoration(); 19489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 195c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } 19689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project }; 197c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent 198c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent void startAnimate(GridLayoutManager layout, View view, long startDelay) { 19989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mAnimator == null) { 200c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent mAnimator = new TimeAnimator(); 201c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent mAnimator.setTimeListener(mTimeListener); 202c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } 20389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mFirstAttached) { 20489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // first time record the initial location and return without animation 20534f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent // TODO do we need initial animation? 20634f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent mViewX = layout.getScrollOffsetX() + getOpticalLeft(view); 207be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent mViewY = layout.getScrollOffsetY() + getOpticalTop(view); 208d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent mOrientation = layout.mOrientation; 209d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent mSize = mOrientation == HORIZONTAL ? view.getMeasuredWidth() : view.getMeasuredHeight(); 210be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent mFirstAttached = false; 2112beeb50b1bba9e92f6cacfeca37fe9fa9d36ead1Eric Laurent return; 212be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent } 21334f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent mView = view; 21434f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent int newViewX = layout.getScrollOffsetX() + getOpticalLeft(mView); 215d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent int newViewY = layout.getScrollOffsetY() + getOpticalTop(mView); 21689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (newViewX != mViewX || newViewY != mViewY) { 21734f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent mAnimator.cancel(); 21889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mAnimationStartTranslationX = mView.getTranslationX(); 21989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mAnimationStartTranslationY = mView.getTranslationY(); 22034f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent mAnimationStartTranslationX += mViewX - newViewX; 22189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mAnimationStartTranslationY += mViewY - newViewY; 22289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mDuration = layout.getChildLayoutAnimationDuration(); 22389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mAnimator.setDuration(mDuration); 22489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mAnimator.setInterpolator(layout.getChildLayoutAnimationInterpolator()); 22589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mAnimator.setStartDelay(startDelay); 22689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mAnimator.start(); 22789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mViewX = newViewX; 22889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mViewY = newViewY; 22989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 23089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 23189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 23289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project void endAnimate() { 233c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent if (mAnimator != null) { 23489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mAnimator.end(); 23589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 23689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mView != null) { 23789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mSize = mOrientation == HORIZONTAL ? 23889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mView.getMeasuredWidth() : mView.getMeasuredHeight(); 23989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mView.setTranslationX(0); 24089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mView.setTranslationY(0); 24189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mView = null; 2422c22aeb65e801f663a754d043062f85e49f77739Jean-Michel Trivi } 24389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 24489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 245c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent private void invalidateItemDecoration() { 24689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project ViewParent parent = mView.getParent(); 24789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (parent instanceof RecyclerView) { 24889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // TODO: we only need invalidate parent if it has ItemDecoration 24989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project ((RecyclerView) parent).invalidate(); 25089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 25189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 25289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 25389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 25489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private static final String TAG = "GridLayoutManager"; 25589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private static final boolean DEBUG = false; 25689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 25789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private static final Interpolator sDefaultAnimationChildLayoutInterpolator 25889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project = new DecelerateInterpolator(); 25989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 26089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private static final long DEFAULT_CHILD_ANIMATION_DURATION_MS = 250; 26189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 26289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private String getTag() { 26389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return TAG + ":" + mBaseGridView.getId(); 26489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 26589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 26689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private final BaseGridView mBaseGridView; 26789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 26889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 26989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * The orientation of a "row". 27089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 27189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private int mOrientation = HORIZONTAL; 27289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 27389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private RecyclerView.Adapter mAdapter; 27489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private RecyclerView.Recycler mRecycler; 27589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 27689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private boolean mInLayout = false; 27789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 27889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private OnChildSelectedListener mChildSelectedListener = null; 279d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent 28089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 28189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * The focused position, it's not the currently visually aligned position 28289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * but it is the final position that we intend to focus on. If there are 28389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * multiple setSelection() called, mFocusPosition saves last value. 284c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent */ 285c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent private int mFocusPosition = NO_POSITION; 286c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent 287c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent /** 288c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent * Force a full layout under certain situations. 28989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 29089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private boolean mForceFullLayout; 29189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 29289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 29389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * The scroll offsets of the viewport relative to the entire view. 29489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 29589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private int mScrollOffsetPrimary; 29689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private int mScrollOffsetSecondary; 29789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 29889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 29989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * User-specified row height/column width. Can be WRAP_CONTENT. 30089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 301d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent private int mRowSizeSecondaryRequested; 30289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 30389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 30489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * The fixed size of each grid item in the secondary direction. This corresponds to 30589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * the row height, equal for all rows. Grid items may have variable length 30689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * in the primary direction. 30789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 30889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private int mFixedRowSizeSecondary; 30989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 31089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 31189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Tracks the secondary size of each row. 31289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 31389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private int[] mRowSizeSecondary; 314f5aafb209d01ba2ab6cb55d1a12cfc653e2b4be0Eric Laurent 315f5aafb209d01ba2ab6cb55d1a12cfc653e2b4be0Eric Laurent /** 316f5aafb209d01ba2ab6cb55d1a12cfc653e2b4be0Eric Laurent * Flag controlling whether the current/next layout should 3172b584244930c9de0e3bc46898a801e9ccb731900Eric Laurent * be updating the secondary size of rows. 3182b584244930c9de0e3bc46898a801e9ccb731900Eric Laurent */ 3192b584244930c9de0e3bc46898a801e9ccb731900Eric Laurent private boolean mRowSecondarySizeRefresh; 32044d9848d6656777a18019223e0d35f2fcc67719aEric Laurent 3212b584244930c9de0e3bc46898a801e9ccb731900Eric Laurent /** 3222b584244930c9de0e3bc46898a801e9ccb731900Eric Laurent * The maximum measured size of the view. 3232b584244930c9de0e3bc46898a801e9ccb731900Eric Laurent */ 3242b584244930c9de0e3bc46898a801e9ccb731900Eric Laurent private int mMaxSizeSecondary; 3252b584244930c9de0e3bc46898a801e9ccb731900Eric Laurent 3262b584244930c9de0e3bc46898a801e9ccb731900Eric Laurent /** 327d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent * Margin between items. 328d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent */ 329d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent private int mHorizontalMargin; 330d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent /** 331d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent * Margin between items vertically. 332d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent */ 333d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent private int mVerticalMargin; 334d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent /** 33534f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent * Margin in main direction. 33634f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent */ 33734f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent private int mMarginPrimary; 338d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent /** 3396100d2d60517ff33ed8eb35d0b7ea63cde0831c9Eric Laurent * Margin in second direction. 3406100d2d60517ff33ed8eb35d0b7ea63cde0831c9Eric Laurent */ 3416100d2d60517ff33ed8eb35d0b7ea63cde0831c9Eric Laurent private int mMarginSecondary; 3426100d2d60517ff33ed8eb35d0b7ea63cde0831c9Eric Laurent /** 3436100d2d60517ff33ed8eb35d0b7ea63cde0831c9Eric Laurent * How to position child in secondary direction. 3446100d2d60517ff33ed8eb35d0b7ea63cde0831c9Eric Laurent */ 3452b584244930c9de0e3bc46898a801e9ccb731900Eric Laurent private int mGravity = Gravity.LEFT | Gravity.TOP; 3462b584244930c9de0e3bc46898a801e9ccb731900Eric Laurent /** 3472b584244930c9de0e3bc46898a801e9ccb731900Eric Laurent * The number of rows in the grid. 348f5aafb209d01ba2ab6cb55d1a12cfc653e2b4be0Eric Laurent */ 34934f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent private int mNumRows; 3502b584244930c9de0e3bc46898a801e9ccb731900Eric Laurent /** 35134f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent * Number of rows requested, can be 0 to be determined by parent size and 3522b584244930c9de0e3bc46898a801e9ccb731900Eric Laurent * rowHeight. 35334f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent */ 35489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private int mNumRowsRequested = 1; 35589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 35689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 35789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Tracking start/end position of each row for visible items. 35889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 35989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private StaggeredGrid.Row[] mRows; 36089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 36189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 36289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Saves grid information of each view. 36389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 36489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private StaggeredGrid mGrid; 36589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 36689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Position of first item (included) that has attached views. 36789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 36889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private int mFirstVisiblePos; 36989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 37089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Position of last item (included) that has attached views. 371f5aafb209d01ba2ab6cb55d1a12cfc653e2b4be0Eric Laurent */ 372f5aafb209d01ba2ab6cb55d1a12cfc653e2b4be0Eric Laurent private int mLastVisiblePos; 373f5aafb209d01ba2ab6cb55d1a12cfc653e2b4be0Eric Laurent 3741dd70b9f04961a06fcb73a97fca10a53b3245d3cEric Laurent /** 37589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Focus Scroll strategy. 37689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 37789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private int mFocusScrollStrategy = BaseGridView.FOCUS_SCROLL_ALIGNED; 37889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 3792c22aeb65e801f663a754d043062f85e49f77739Jean-Michel Trivi * Defines how item view is aligned in the window. 3802c22aeb65e801f663a754d043062f85e49f77739Jean-Michel Trivi */ 3812c22aeb65e801f663a754d043062f85e49f77739Jean-Michel Trivi private final WindowAlignment mWindowAlignment = new WindowAlignment(); 38289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 38389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 38489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Defines how item view is aligned. 38589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 38689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private final ItemAlignment mItemAlignment = new ItemAlignment(); 38789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 38889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 38989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Dimensions of the view, width or height depending on orientation. 39089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 39189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private int mSizePrimary; 39289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 39389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 39489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Allow DPAD key to navigate out at the front of the View (where position = 0), 39589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * default is false. 39689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 39789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private boolean mFocusOutFront; 39889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 39989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 40089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Allow DPAD key to navigate out at the end of the view, default is false. 40189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 40289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private boolean mFocusOutEnd; 40389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 40489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 40589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * True if focus search is disabled. 40689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 407c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent private boolean mFocusSearchDisabled; 4082c22aeb65e801f663a754d043062f85e49f77739Jean-Michel Trivi 4092c22aeb65e801f663a754d043062f85e49f77739Jean-Michel Trivi /** 4102c22aeb65e801f663a754d043062f85e49f77739Jean-Michel Trivi * Animate layout changes from a child resizing or adding/removing a child. 4112c22aeb65e801f663a754d043062f85e49f77739Jean-Michel Trivi */ 412c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent private boolean mAnimateChildLayout = true; 41389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 41489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 41589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Interpolator used to animate layout of children. 41689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 41789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private Interpolator mAnimateLayoutChildInterpolator = sDefaultAnimationChildLayoutInterpolator; 41889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 41989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 42089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Duration used to animate layout of children. 42189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 42289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private long mAnimateLayoutChildDuration = DEFAULT_CHILD_ANIMATION_DURATION_MS; 42389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 424f5aafb209d01ba2ab6cb55d1a12cfc653e2b4be0Eric Laurent public GridLayoutManager(BaseGridView baseGridView) { 425f5aafb209d01ba2ab6cb55d1a12cfc653e2b4be0Eric Laurent mBaseGridView = baseGridView; 426f5aafb209d01ba2ab6cb55d1a12cfc653e2b4be0Eric Laurent } 42789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 42889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public void setOrientation(int orientation) { 42989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (orientation != HORIZONTAL && orientation != VERTICAL) { 43089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (DEBUG) Log.v(getTag(), "invalid orientation: " + orientation); 43189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return; 43289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 43389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 43489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mOrientation = orientation; 43589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mWindowAlignment.setOrientation(orientation); 43689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mItemAlignment.setOrientation(orientation); 43789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mForceFullLayout = true; 43889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 43989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 44089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public int getFocusScrollStrategy() { 44189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return mFocusScrollStrategy; 442be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent } 44389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 444be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent public void setFocusScrollStrategy(int focusScrollStrategy) { 445be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent mFocusScrollStrategy = focusScrollStrategy; 446be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent } 447be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent 44889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public void setWindowAlignment(int windowAlignment) { 44989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mWindowAlignment.mainAxis().setWindowAlignment(windowAlignment); 45089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 45189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 452be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent public int getWindowAlignment() { 453be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent return mWindowAlignment.mainAxis().getWindowAlignment(); 454be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent } 45589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 45689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public void setWindowAlignmentOffset(int alignmentOffset) { 45789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mWindowAlignment.mainAxis().setWindowAlignmentOffset(alignmentOffset); 45889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 459be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent 460be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent public int getWindowAlignmentOffset() { 461be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent return mWindowAlignment.mainAxis().getWindowAlignmentOffset(); 462be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent } 463be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent 464be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent public void setWindowAlignmentOffsetPercent(float offsetPercent) { 465be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent mWindowAlignment.mainAxis().setWindowAlignmentOffsetPercent(offsetPercent); 466be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent } 4672beeb50b1bba9e92f6cacfeca37fe9fa9d36ead1Eric Laurent 468be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent public float getWindowAlignmentOffsetPercent() { 4692beeb50b1bba9e92f6cacfeca37fe9fa9d36ead1Eric Laurent return mWindowAlignment.mainAxis().getWindowAlignmentOffsetPercent(); 470be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent } 471be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent 472be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent public void setItemAlignmentOffset(int alignmentOffset) { 473be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent mItemAlignment.mainAxis().setItemAlignmentOffset(alignmentOffset); 474be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent updateChildAlignments(); 475be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent } 476be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent 477be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent public int getItemAlignmentOffset() { 478be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent return mItemAlignment.mainAxis().getItemAlignmentOffset(); 479be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent } 480be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent 4812beeb50b1bba9e92f6cacfeca37fe9fa9d36ead1Eric Laurent public void setItemAlignmentOffsetPercent(float offsetPercent) { 482be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent mItemAlignment.mainAxis().setItemAlignmentOffsetPercent(offsetPercent); 483be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent updateChildAlignments(); 484be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent } 485be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent 48689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public float getItemAlignmentOffsetPercent() { 48789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return mItemAlignment.mainAxis().getItemAlignmentOffsetPercent(); 488573266210fb2b2e7d86fbd46d0dfe16763611d91Eric Laurent } 48989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 49089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public void setItemAlignmentViewId(int viewId) { 49189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mItemAlignment.mainAxis().setItemAlignmentViewId(viewId); 49289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project updateChildAlignments(); 493573266210fb2b2e7d86fbd46d0dfe16763611d91Eric Laurent } 49489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 49589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public int getItemAlignmentViewId() { 496573266210fb2b2e7d86fbd46d0dfe16763611d91Eric Laurent return mItemAlignment.mainAxis().getItemAlignmentViewId(); 49789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 498573266210fb2b2e7d86fbd46d0dfe16763611d91Eric Laurent 499573266210fb2b2e7d86fbd46d0dfe16763611d91Eric Laurent public void setFocusOutAllowed(boolean throughFront, boolean throughEnd) { 50089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mFocusOutFront = throughFront; 50189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mFocusOutEnd = throughEnd; 50289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 50389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 504573266210fb2b2e7d86fbd46d0dfe16763611d91Eric Laurent public void setNumRows(int numRows) { 50589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (numRows < 0) throw new IllegalArgumentException(); 50689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mNumRowsRequested = numRows; 50789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mForceFullLayout = true; 50889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 50989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 51089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 51189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Set the row height. May be WRAP_CONTENT, or a size in pixels. 51289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 51389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public void setRowHeight(int height) { 51489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (height >= 0 || height == ViewGroup.LayoutParams.WRAP_CONTENT) { 51589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mRowSizeSecondaryRequested = height; 51689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else { 51789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project throw new IllegalArgumentException("Invalid row height: " + height); 51889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 51989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 52089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 52189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public void setItemMargin(int margin) { 522d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent mVerticalMargin = mHorizontalMargin = margin; 523d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent mMarginPrimary = mMarginSecondary = margin; 52489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 52589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 52689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public void setVerticalMargin(int margin) { 527d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent if (mOrientation == HORIZONTAL) { 52889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mMarginSecondary = mVerticalMargin = margin; 529d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent } else { 53089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mMarginPrimary = mVerticalMargin = margin; 531c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } 53289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 53389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 53489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public void setHorizontalMargin(int margin) { 53589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mOrientation == HORIZONTAL) { 53689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mMarginPrimary = mHorizontalMargin = margin; 53789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else { 53889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mMarginSecondary = mHorizontalMargin = margin; 53989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 54089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 54189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 54289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public int getVerticalMargin() { 54389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return mVerticalMargin; 54489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 54589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 54689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public int getHorizontalMargin() { 54789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return mHorizontalMargin; 54889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 54989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 55089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public void setGravity(int gravity) { 55189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mGravity = gravity; 55289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 55389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 55489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project protected boolean hasDoneFirstLayout() { 55589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return mGrid != null; 55689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 55789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 55889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public void setOnChildSelectedListener(OnChildSelectedListener listener) { 55989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mChildSelectedListener = listener; 56089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 56189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 56289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private int getPositionByView(View view) { 56389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return getPositionByIndex(mBaseGridView.indexOfChild(view)); 56489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 5652c22aeb65e801f663a754d043062f85e49f77739Jean-Michel Trivi 56689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private int getPositionByIndex(int index) { 56789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (index < 0) { 56889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return NO_POSITION; 56989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 57089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return mFirstVisiblePos + index; 57189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 57289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 57389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private View getViewByPosition(int position) { 57489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int index = getIndexByPosition(position); 57589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (index < 0) { 57689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return null; 57789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 57889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return getChildAt(index); 57989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 58089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 58189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private int getIndexByPosition(int position) { 58289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mFirstVisiblePos < 0 || 58389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project position < mFirstVisiblePos || position > mLastVisiblePos) { 58489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return NO_POSITION; 58589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 58689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return position - mFirstVisiblePos; 58789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 58889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 58989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private void dispatchChildSelected() { 59089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mChildSelectedListener == null) { 59189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return; 59289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 59389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 59489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project View view = getViewByPosition(mFocusPosition); 59589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 59689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mFocusPosition != NO_POSITION) { 59789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mChildSelectedListener.onChildSelected(mBaseGridView, view, mFocusPosition, 59889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mAdapter.getItemId(mFocusPosition)); 59989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else { 60089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mChildSelectedListener.onChildSelected(mBaseGridView, null, NO_POSITION, NO_ID); 60189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 60289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 60389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 60489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project @Override 60589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public boolean canScrollHorizontally() { 60689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // We can scroll horizontally if we have horizontal orientation, or if 60789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // we are vertical and have more than one column. 60889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return mOrientation == HORIZONTAL || mNumRows > 1; 609d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent } 610c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent 61189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project @Override 61289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public boolean canScrollVertically() { 61389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // We can scroll vertically if we have vertical orientation, or if we 61489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // are horizontal and have more than one row. 61589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return mOrientation == VERTICAL || mNumRows > 1; 61689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 61789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 61889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project @Override 61989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public RecyclerView.LayoutParams generateDefaultLayoutParams() { 62089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 62189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project ViewGroup.LayoutParams.WRAP_CONTENT); 62289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 62389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 62489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project @Override 62589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public RecyclerView.LayoutParams generateLayoutParams(Context context, AttributeSet attrs) { 626c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent return new LayoutParams(context, attrs); 62789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 62889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 629d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent @Override 63089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public RecyclerView.LayoutParams generateLayoutParams(ViewGroup.LayoutParams lp) { 63189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (lp instanceof LayoutParams) { 63289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return new LayoutParams((LayoutParams) lp); 63389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else if (lp instanceof RecyclerView.LayoutParams) { 634c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent return new LayoutParams((RecyclerView.LayoutParams) lp); 635c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } else if (lp instanceof MarginLayoutParams) { 636c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent return new LayoutParams((MarginLayoutParams) lp); 637c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } else { 638c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent return new LayoutParams(lp); 639c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } 640be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent } 641be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent 642be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent protected View getViewForPosition(int position) { 643be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent View v = mRecycler.getViewForPosition(mAdapter, position); 644be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent if (v != null) { 645be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent ((LayoutParams) v.getLayoutParams()).onViewAttached(); 646be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent } 6472beeb50b1bba9e92f6cacfeca37fe9fa9d36ead1Eric Laurent return v; 6482beeb50b1bba9e92f6cacfeca37fe9fa9d36ead1Eric Laurent } 6492beeb50b1bba9e92f6cacfeca37fe9fa9d36ead1Eric Laurent 6502beeb50b1bba9e92f6cacfeca37fe9fa9d36ead1Eric Laurent final int getOpticalLeft(View v) { 6512beeb50b1bba9e92f6cacfeca37fe9fa9d36ead1Eric Laurent return ((LayoutParams) v.getLayoutParams()).getOpticalLeft(v); 6522beeb50b1bba9e92f6cacfeca37fe9fa9d36ead1Eric Laurent } 653be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent 654be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent final int getOpticalRight(View v) { 65589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return ((LayoutParams) v.getLayoutParams()).getOpticalRight(v); 65689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 65734f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent 65834f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent final int getOpticalTop(View v) { 65934f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent return ((LayoutParams) v.getLayoutParams()).getOpticalTop(v); 66034f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } 66134f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent 66234f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent final int getOpticalBottom(View v) { 66334f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent return ((LayoutParams) v.getLayoutParams()).getOpticalBottom(v); 66434f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } 665d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent 666d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent private int getViewMin(View v) { 66734f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent return (mOrientation == HORIZONTAL) ? getOpticalLeft(v) : getOpticalTop(v); 66834f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } 66934f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent 67034f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent private int getViewMax(View v) { 67134f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent return (mOrientation == HORIZONTAL) ? getOpticalRight(v) : getOpticalBottom(v); 67234f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } 67334f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent 67434f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent private int getViewCenter(View view) { 675d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent return (mOrientation == HORIZONTAL) ? getViewCenterX(view) : getViewCenterY(view); 676d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent } 677d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent 678d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent private int getViewCenterSecondary(View view) { 679d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent return (mOrientation == HORIZONTAL) ? getViewCenterY(view) : getViewCenterX(view); 680d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent } 681d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent 682d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent private int getViewCenterX(View v) { 683d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent LayoutParams p = (LayoutParams) v.getLayoutParams(); 684d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent return p.getOpticalLeft(v) + p.getAlignX(); 685d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent } 686d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent 687d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent private int getViewCenterY(View v) { 688d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent LayoutParams p = (LayoutParams) v.getLayoutParams(); 689d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent return p.getOpticalTop(v) + p.getAlignY(); 690d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent } 691d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent 692d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent private void setViewLayoutForward(View v, boolean layoutForward) { 693d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent LayoutParams p = (LayoutParams) v.getLayoutParams(); 694d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent p.mLayoutForward = layoutForward; 695d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent } 696d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent 697d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent private boolean getIsViewLayoutForward(View v) { 698d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent return ((LayoutParams) v.getLayoutParams()).mLayoutForward; 699d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent } 700d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent 701d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent /** 702d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent * Re-initialize data structures for a data change or handling invisible 703d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent * selection. The method tries its best to preserve position information so 704d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent * that staggered grid looks same before and after re-initialize. 705d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent * @param focusPosition The initial focusPosition that we would like to 706d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent * focus on. 707d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent * @return Actual position that can be focused on. 708d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent */ 709d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent private int init(RecyclerView.Adapter adapter, RecyclerView.Recycler recycler, 710d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent int focusPosition) { 711d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent 712d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent final int newItemCount = adapter.getItemCount(); 713d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent 714d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent if (focusPosition == NO_POSITION && newItemCount > 0) { 715d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent // if focus position is never set before, initialize it to 0 716d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent focusPosition = 0; 717d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent } 718d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent // If adapter has changed then caches are invalid; otherwise, 719d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent // we try to maintain each row's position if number of rows keeps the same 720d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent // and existing mGrid contains the focusPosition. 721d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent if (mRows != null && mNumRows == mRows.length && 722d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent mGrid != null && mGrid.getSize() > 0 && focusPosition >= 0 && 723d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent focusPosition >= mGrid.getFirstIndex() && 724d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent focusPosition <= mGrid.getLastIndex()) { 725d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent // strip mGrid to a subset (like a column) that contains focusPosition 726d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent mGrid.stripDownTo(focusPosition); 727d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent // make sure that remaining items do not exceed new adapter size 728d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent int firstIndex = mGrid.getFirstIndex(); 729d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent int lastIndex = mGrid.getLastIndex(); 73034f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent if (DEBUG) { 73134f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent Log .v(getTag(), "mGrid firstIndex " + firstIndex + " lastIndex " + lastIndex); 73234f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } 73334f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent for (int i = lastIndex; i >=firstIndex; i--) { 73434f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent if (i >= newItemCount) { 73534f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent mGrid.removeLast(); 73634f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } 73734f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } 73834f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent if (mGrid.getSize() == 0) { 739be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent focusPosition = newItemCount - 1; 74034f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent // initialize row start locations 74134f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent for (int i = 0; i < mNumRows; i++) { 74234f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent mRows[i].low = 0; 74334f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent mRows[i].high = 0; 74434f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } 74534f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent if (DEBUG) Log.v(getTag(), "mGrid zero size"); 74634f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } else { 74734f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent // initialize row start locations 74834f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent for (int i = 0; i < mNumRows; i++) { 74934f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent mRows[i].low = Integer.MAX_VALUE; 75034f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent mRows[i].high = Integer.MIN_VALUE; 75134f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } 75234f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent firstIndex = mGrid.getFirstIndex(); 75334f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent lastIndex = mGrid.getLastIndex(); 75434f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent if (focusPosition > lastIndex) { 75534f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent focusPosition = mGrid.getLastIndex(); 756d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent } 75734f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent if (DEBUG) { 75834f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent Log.v(getTag(), "mGrid firstIndex " + firstIndex + " lastIndex " 75934f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent + lastIndex + " focusPosition " + focusPosition); 76034f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } 76134f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent // fill rows with minimal view positions of the subset 762d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent for (int i = firstIndex; i <= lastIndex; i++) { 76334f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent View v = getViewByPosition(i); 76434f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent if (v == null) { 765be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent continue; 766be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent } 7672beeb50b1bba9e92f6cacfeca37fe9fa9d36ead1Eric Laurent int row = mGrid.getLocation(i).row; 7686100d2d60517ff33ed8eb35d0b7ea63cde0831c9Eric Laurent int low = getViewMin(v) + mScrollOffsetPrimary; 7696100d2d60517ff33ed8eb35d0b7ea63cde0831c9Eric Laurent if (low < mRows[row].low) { 770d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent mRows[row].low = mRows[row].high = low; 771d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent } 77234f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } 77334f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent // fill other rows that does not include the subset using first item 77434f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent int firstItemRowPosition = mRows[mGrid.getLocation(firstIndex).row].low; 77589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (firstItemRowPosition == Integer.MAX_VALUE) { 77689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project firstItemRowPosition = 0; 77789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 77889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project for (int i = 0; i < mNumRows; i++) { 77989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mRows[i].low == Integer.MAX_VALUE) { 78089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mRows[i].low = mRows[i].high = firstItemRowPosition; 7811dd70b9f04961a06fcb73a97fca10a53b3245d3cEric Laurent } 78289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 78389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 78489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 78589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // Same adapter, we can reuse any attached views 78689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project detachAndScrapAttachedViews(recycler); 78789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 78889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else { 78934f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent // otherwise recreate data structure 79089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mRows = new StaggeredGrid.Row[mNumRows]; 79189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mRowSizeSecondary = new int[mNumRows]; 79289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 79389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project for (int i = 0; i < mNumRows; i++) { 79489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mRows[i] = new StaggeredGrid.Row(); 79534f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } 79689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mGrid = new StaggeredGridDefault(); 79789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (newItemCount == 0) { 79834f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent focusPosition = NO_POSITION; 79934f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } else if (focusPosition >= newItemCount) { 80089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project focusPosition = newItemCount - 1; 80134f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } 802d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent 803d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent // Adapter may have changed so remove all attached views permanently 804d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent removeAllViews(); 805d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent 806d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent mScrollOffsetPrimary = 0; 807d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent mScrollOffsetSecondary = 0; 808d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent mWindowAlignment.reset(); 809d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent } 810d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent 811c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent mAdapter = adapter; 8121dd70b9f04961a06fcb73a97fca10a53b3245d3cEric Laurent mRecycler = recycler; 81389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mGrid.setProvider(mGridProvider); 81489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // mGrid share the same Row array information 81589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mGrid.setRows(mRows); 81689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mFirstVisiblePos = mLastVisiblePos = NO_POSITION; 81789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 81889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project initScrollController(); 819c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent updateScrollSecondAxis(); 82089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 82134f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent return focusPosition; 82234f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } 82334f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent 824d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent private int getRowSizeSecondary(int rowIndex) { 82534f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent if (mFixedRowSizeSecondary != 0) { 826d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent return mFixedRowSizeSecondary; 82734f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } 82834f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent if (mRowSizeSecondary == null) { 82934f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent return 0; 8306100d2d60517ff33ed8eb35d0b7ea63cde0831c9Eric Laurent } 83134f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent return mRowSizeSecondary[rowIndex]; 83234f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent } 83389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 83489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private int getRowStartSecondary(int rowIndex) { 83589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int start = 0; 83689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project for (int i = 0; i < rowIndex; i++) { 837c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent start += getRowSizeSecondary(i) + mMarginSecondary; 83889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 83934f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent return start; 84089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 84189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 84289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private int getSizeSecondary() { 84389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return getRowStartSecondary(mNumRows - 1) + getRowSizeSecondary(mNumRows - 1); 84489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 84589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 84689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private boolean processRowSizeSecondary(boolean measure) { 84734f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent if (mFixedRowSizeSecondary != 0) { 84889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return false; 84989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 85044d9848d6656777a18019223e0d35f2fcc67719aEric Laurent 85144d9848d6656777a18019223e0d35f2fcc67719aEric Laurent List<Integer>[] rows = mGrid.getItemPositionsInRows(mFirstVisiblePos, mLastVisiblePos); 85244d9848d6656777a18019223e0d35f2fcc67719aEric Laurent boolean changed = false; 85344d9848d6656777a18019223e0d35f2fcc67719aEric Laurent 85444d9848d6656777a18019223e0d35f2fcc67719aEric Laurent for (int rowIndex = 0; rowIndex < mNumRows; rowIndex++) { 85544d9848d6656777a18019223e0d35f2fcc67719aEric Laurent int rowSize = 0; 85644d9848d6656777a18019223e0d35f2fcc67719aEric Laurent 85789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project final int rowItemCount = rows[rowIndex].size(); 858c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent if (DEBUG) Log.v(getTag(), "processRowSizeSecondary row " + rowIndex + 85989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project " rowItemCount " + rowItemCount); 86089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 86189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project for (int i = 0; i < rowItemCount; i++) { 86289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project final int position = rows[rowIndex].get(i); 86389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project final View view = getViewByPosition(position); 86489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (measure && view.isLayoutRequested()) { 86589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project measureChild(view, rowIndex); 86689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 86789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // If this view isn't visible, we ignore it. 86889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (getOpticalRight(view) < 0 || getOpticalLeft(view) > getWidth() || 86989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project getOpticalBottom(view) < 0 || getOpticalTop(view) > getHeight()) { 870c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent continue; 871c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } 872c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent final int secondarySize = mOrientation == HORIZONTAL ? 873c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent view.getMeasuredHeight() : view.getMeasuredWidth(); 874c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent if (secondarySize > rowSize) { 875c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent rowSize = secondarySize; 876c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } 877c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } 878c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent if (DEBUG) Log.v(getTag(), "row " + rowIndex + " rowItemCount " + rowItemCount + 879c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent " rowSize " + rowSize); 88089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 88189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mRowSizeSecondary[rowIndex] != rowSize) { 88289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (DEBUG) Log.v(getTag(), "row size secondary changed: " + mRowSizeSecondary[rowIndex] + 88389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project ", " + rowSize); 88489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 88589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mRowSizeSecondary[rowIndex] = rowSize; 88689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project changed = true; 88789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 88889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 88989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 89089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return changed; 89189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 89289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 89389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project /** 89489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * Checks if we need to update row secondary sizes. 89589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project */ 89689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private void updateRowSecondarySizeRefresh() { 89789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mRowSecondarySizeRefresh = processRowSizeSecondary(false); 89889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mRowSecondarySizeRefresh) { 89989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (DEBUG) Log.v(getTag(), "mRowSecondarySizeRefresh now set"); 90089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project forceRequestLayout(); 90189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 90289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 90389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 90489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private void forceRequestLayout() { 90589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (DEBUG) Log.v(getTag(), "forceRequestLayout"); 90689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // RecyclerView prevents us from requesting layout in many cases 90789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // (during layout, during scroll, etc.) 90889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // For secondary row size wrap_content support we currently need a 90989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // second layout pass to update the measured size after having measured 91089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // and added child views in layoutChildren. 911c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent // Force the second layout by posting a delayed runnable. 912c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent // TODO: investigate allowing a second layout pass, 91389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // or move child add/measure logic to the measure phase. 91489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mBaseGridView.getHandler().post(new Runnable() { 91589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project @Override 91689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public void run() { 91789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (DEBUG) Log.v(getTag(), "request Layout from runnable"); 91889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project requestLayout(); 91989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 92089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project }); 92189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 92289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 92389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project @Override 924c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent public void onMeasure(int widthSpec, int heightSpec) { 9253302526f6276911b2dc40c731ea7fa0e7972d908Eric Laurent int sizePrimary, sizeSecondary, modeSecondary, paddingSecondary; 92689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int measuredSizeSecondary; 92789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mOrientation == HORIZONTAL) { 92889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project sizePrimary = MeasureSpec.getSize(widthSpec); 92989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project sizeSecondary = MeasureSpec.getSize(heightSpec); 93089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project modeSecondary = MeasureSpec.getMode(heightSpec); 93189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project paddingSecondary = getPaddingTop() + getPaddingBottom(); 93289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else { 93389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project sizeSecondary = MeasureSpec.getSize(widthSpec); 9343302526f6276911b2dc40c731ea7fa0e7972d908Eric Laurent sizePrimary = MeasureSpec.getSize(heightSpec); 93589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project modeSecondary = MeasureSpec.getMode(widthSpec); 93689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project paddingSecondary = getPaddingLeft() + getPaddingRight(); 93789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 93889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (DEBUG) Log.v(getTag(), "onMeasure widthSpec " + Integer.toHexString(widthSpec) + 93989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project " heightSpec " + Integer.toHexString(heightSpec) + 94089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project " modeSecondary " + Integer.toHexString(modeSecondary) + 94189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project " sizeSecondary " + sizeSecondary + " " + this); 94289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 94389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mMaxSizeSecondary = sizeSecondary; 94489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 94589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mRowSizeSecondaryRequested == ViewGroup.LayoutParams.WRAP_CONTENT) { 94689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mNumRows = mNumRowsRequested == 0 ? 1 : mNumRowsRequested; 94789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mFixedRowSizeSecondary = 0; 94889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 94989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // Measure all current children and update cached row heights 95089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mGrid != null) { 95189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project processRowSizeSecondary(true); 95289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 95389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 95489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project switch (modeSecondary) { 95589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project case MeasureSpec.UNSPECIFIED: 95689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project measuredSizeSecondary = getSizeSecondary() + paddingSecondary; 95789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project break; 958d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent case MeasureSpec.AT_MOST: 959d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent measuredSizeSecondary = Math.min(getSizeSecondary() + paddingSecondary, 96089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mMaxSizeSecondary); 96189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project break; 962c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent case MeasureSpec.EXACTLY: 96389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project measuredSizeSecondary = mMaxSizeSecondary; 964d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent break; 96589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project default: 96689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project throw new IllegalStateException("wrong spec"); 96789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 968c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent 96989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else { 97089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project switch (modeSecondary) { 97189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project case MeasureSpec.UNSPECIFIED: 97289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mRowSizeSecondaryRequested == 0) { 97389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mOrientation == HORIZONTAL) { 97489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project throw new IllegalStateException("Must specify rowHeight or view height"); 97589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else { 97689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project throw new IllegalStateException("Must specify columnWidth or view width"); 97789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 97889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 9792c22aeb65e801f663a754d043062f85e49f77739Jean-Michel Trivi mFixedRowSizeSecondary = mRowSizeSecondaryRequested; 98089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mNumRows = mNumRowsRequested == 0 ? 1 : mNumRowsRequested; 98189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project measuredSizeSecondary = mFixedRowSizeSecondary * mNumRows + mMarginSecondary 9822c22aeb65e801f663a754d043062f85e49f77739Jean-Michel Trivi * (mNumRows - 1) + paddingSecondary; 98389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project break; 98489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project case MeasureSpec.AT_MOST: 98589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project case MeasureSpec.EXACTLY: 98689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mNumRowsRequested == 0 && mRowSizeSecondaryRequested == 0) { 987c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent mNumRows = 1; 98889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mFixedRowSizeSecondary = sizeSecondary - paddingSecondary; 98989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else if (mNumRowsRequested == 0) { 99089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mFixedRowSizeSecondary = mRowSizeSecondaryRequested; 99189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mNumRows = (sizeSecondary + mMarginSecondary) 99289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project / (mRowSizeSecondaryRequested + mMarginSecondary); 99389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else if (mRowSizeSecondaryRequested == 0) { 99489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mNumRows = mNumRowsRequested; 99589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mFixedRowSizeSecondary = (sizeSecondary - paddingSecondary - mMarginSecondary 99689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project * (mNumRows - 1)) / mNumRows; 99789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else { 99889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mNumRows = mNumRowsRequested; 99989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mFixedRowSizeSecondary = mRowSizeSecondaryRequested; 100089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 100189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project measuredSizeSecondary = sizeSecondary; 100289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (modeSecondary == MeasureSpec.AT_MOST) { 100389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int childrenSize = mFixedRowSizeSecondary * mNumRows + mMarginSecondary 1004c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent * (mNumRows - 1) + paddingSecondary; 1005c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent if (childrenSize < measuredSizeSecondary) { 1006c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent measuredSizeSecondary = childrenSize; 1007c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } 100889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 100989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project break; 101089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project default: 10111dd70b9f04961a06fcb73a97fca10a53b3245d3cEric Laurent throw new IllegalStateException("wrong spec"); 101289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 101389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 101489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mOrientation == HORIZONTAL) { 101589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project setMeasuredDimension(sizePrimary, measuredSizeSecondary); 101689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else { 101789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project setMeasuredDimension(measuredSizeSecondary, sizePrimary); 101889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 101989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (DEBUG) { 102089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project Log.v(getTag(), "onMeasure sizePrimary " + sizePrimary + 10213302526f6276911b2dc40c731ea7fa0e7972d908Eric Laurent " measuredSizeSecondary " + measuredSizeSecondary + 102289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project " mFixedRowSizeSecondary " + mFixedRowSizeSecondary + 102389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project " mNumRows " + mNumRows); 102489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 102589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 102689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 102789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private void measureChild(View child, int rowIndex) { 102889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project final ViewGroup.LayoutParams lp = child.getLayoutParams(); 102989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project final int secondarySpec = (mRowSizeSecondaryRequested == ViewGroup.LayoutParams.WRAP_CONTENT) ? 10308555d0867c3e8fe6cc5c7ad40af557fe6b92fa72The Android Open Source Project MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED) : 10318555d0867c3e8fe6cc5c7ad40af557fe6b92fa72The Android Open Source Project MeasureSpec.makeMeasureSpec(mFixedRowSizeSecondary, MeasureSpec.EXACTLY); 10328555d0867c3e8fe6cc5c7ad40af557fe6b92fa72The Android Open Source Project int widthSpec, heightSpec; 10338555d0867c3e8fe6cc5c7ad40af557fe6b92fa72The Android Open Source Project 10348555d0867c3e8fe6cc5c7ad40af557fe6b92fa72The Android Open Source Project if (mOrientation == HORIZONTAL) { 10358555d0867c3e8fe6cc5c7ad40af557fe6b92fa72The Android Open Source Project widthSpec = ViewGroup.getChildMeasureSpec( 10368555d0867c3e8fe6cc5c7ad40af557fe6b92fa72The Android Open Source Project MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 10378555d0867c3e8fe6cc5c7ad40af557fe6b92fa72The Android Open Source Project 0, lp.width); 103889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project heightSpec = ViewGroup.getChildMeasureSpec(secondarySpec, 0, lp.height); 103989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else { 10403302526f6276911b2dc40c731ea7fa0e7972d908Eric Laurent heightSpec = ViewGroup.getChildMeasureSpec( 104189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 104289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 0, lp.height); 104389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project widthSpec = ViewGroup.getChildMeasureSpec(secondarySpec, 0, lp.width); 104489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 104589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 104689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project child.measure(widthSpec, heightSpec); 104789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 104889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (DEBUG) Log.v(getTag(), "measureChild secondarySpec " + Integer.toHexString(secondarySpec) + 104989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project " widthSpec " + Integer.toHexString(widthSpec) + 105089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project " heightSpec " + Integer.toHexString(heightSpec) + 105189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project " measuredWidth " + child.getMeasuredWidth() + 1052c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent " measuredHeight " + child.getMeasuredHeight()); 1053c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent if (DEBUG) Log.v(getTag(), "child lp width " + lp.width + " height " + lp.height); 1054c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } 1055c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent 1056c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent private StaggeredGrid.Provider mGridProvider = new StaggeredGrid.Provider() { 105789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 105889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project @Override 105989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project public int getCount() { 106089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return mAdapter.getItemCount(); 106189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 106289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 106389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project @Override 1064d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent public void createItem(int index, int rowIndex, boolean append) { 106589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project View v = getViewForPosition(index); 106689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mFirstVisiblePos >= 0) { 106789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // when StaggeredGrid append or prepend item, we must guarantee 106889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // that sibling item has created views already. 106989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (append && index != mLastVisiblePos + 1) { 107089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project throw new RuntimeException(); 107189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else if (!append && index != mFirstVisiblePos - 1) { 107289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project throw new RuntimeException(); 107389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 107489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 107589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 107689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (append) { 107789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project addView(v); 107889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else { 107989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project addView(v, 0); 108089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 1081d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent 108289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project measureChild(v, rowIndex); 1083573266210fb2b2e7d86fbd46d0dfe16763611d91Eric Laurent 108489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int length = mOrientation == HORIZONTAL ? v.getMeasuredWidth() : v.getMeasuredHeight(); 108589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int start, end; 108689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (append) { 108789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project start = mRows[rowIndex].high; 108889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (start != mRows[rowIndex].low) { 108989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // if there are existing item in the row, add margin between 109089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project start += mMarginPrimary; 109189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else { 109289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project final int lastRow = mRows.length - 1; 109389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (lastRow != rowIndex && mRows[lastRow].high != mRows[lastRow].low) { 109489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // if there are existing item in the last row, insert 109589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // the new item after the last item of last row. 109689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project start = mRows[lastRow].high + mMarginPrimary; 109789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 109889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 109989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project end = start + length; 110089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mRows[rowIndex].high = end; 110189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else { 110289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project end = mRows[rowIndex].low; 110389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (end != mRows[rowIndex].high) { 110489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project end -= mMarginPrimary; 110589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else if (0 != rowIndex && mRows[0].high != mRows[0].low) { 110689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // if there are existing item in the first row, insert 110789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // the new item before the first item of first row. 110889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project end = mRows[0].low - mMarginPrimary; 110989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 111089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project start = end - length; 111189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mRows[rowIndex].low = start; 111289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 111389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mFirstVisiblePos < 0) { 111489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mFirstVisiblePos = mLastVisiblePos = index; 111554b1a0550411c2fd2084d82d28934d505c37349aMathias Agopian } else { 111654b1a0550411c2fd2084d82d28934d505c37349aMathias Agopian if (append) { 111754b1a0550411c2fd2084d82d28934d505c37349aMathias Agopian mLastVisiblePos++; 1118be916aa1267e2e6b1c148f51d11bcbbc79cb864cEric Laurent } else { 111989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mFirstVisiblePos--; 112089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 112189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 112289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (DEBUG) Log.v(getTag(), "start " + start + " end " + end); 112389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int startSecondary = getRowStartSecondary(rowIndex) - mScrollOffsetSecondary; 112489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project layoutChild(rowIndex, v, start - mScrollOffsetPrimary, end - mScrollOffsetPrimary, 112589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project startSecondary); 112689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (DEBUG) { 112789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project Log.d(getTag(), "addView " + index + " " + v); 1128d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent } 112989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project updateScrollMin(); 113089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project updateScrollMax(); 113189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 113289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project setViewLayoutForward(v, append); 113389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 113489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project }; 113589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 113689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private void layoutChild(int rowIndex, View v, int start, int end, int startSecondary) { 113789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int sizeSecondary = mOrientation == HORIZONTAL ? v.getMeasuredHeight() 113889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project : v.getMeasuredWidth(); 113989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mFixedRowSizeSecondary > 0) { 114089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project sizeSecondary = Math.min(sizeSecondary, mFixedRowSizeSecondary); 114189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 114289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project final int verticalGravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK; 114389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project final int horizontalGravity = mGravity & Gravity.HORIZONTAL_GRAVITY_MASK; 114489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mOrientation == HORIZONTAL && verticalGravity == Gravity.TOP 1145d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent || mOrientation == VERTICAL && horizontalGravity == Gravity.LEFT) { 114689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // do nothing 114789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else if (mOrientation == HORIZONTAL && verticalGravity == Gravity.BOTTOM 114889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project || mOrientation == VERTICAL && horizontalGravity == Gravity.RIGHT) { 114989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project startSecondary += getRowSizeSecondary(rowIndex) - sizeSecondary; 115089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else if (mOrientation == HORIZONTAL && verticalGravity == Gravity.CENTER_VERTICAL 115189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project || mOrientation == VERTICAL && horizontalGravity == Gravity.CENTER_HORIZONTAL) { 115289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project startSecondary += (getRowSizeSecondary(rowIndex) - sizeSecondary) / 2; 115389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 115489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int left, top, right, bottom; 115589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mOrientation == HORIZONTAL) { 115689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project left = start; 115789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project top = startSecondary; 115889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project right = end; 115989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project bottom = startSecondary + sizeSecondary; 116089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else { 116189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project top = start; 116289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project left = startSecondary; 116389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project bottom = end; 116489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project right = startSecondary + sizeSecondary; 116589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 116689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project v.layout(left, top, right, bottom); 116789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project updateChildOpticalInsets(v, left, top, right, bottom); 116889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project updateChildAlignments(v); 116989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 1170d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent 117189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private void updateChildOpticalInsets(View v, int left, int top, int right, int bottom) { 117289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project LayoutParams p = (LayoutParams) v.getLayoutParams(); 117389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project p.setOpticalInsets(left - v.getLeft(), top - v.getTop(), 117434f1d8ecd23169a5f299937e3aaf1bd7937578a0Eric Laurent v.getRight() - right, v.getBottom() - bottom); 1175c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent } 117689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 117789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private void updateChildAlignments(View v) { 117889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project LayoutParams p = (LayoutParams) v.getLayoutParams(); 117989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project p.setAlignX(mItemAlignment.horizontal.getAlignmentPosition(v)); 118089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project p.setAlignY(mItemAlignment.vertical.getAlignmentPosition(v)); 118189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 118289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 118389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private void updateChildAlignments() { 118489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project for (int i = 0, c = getChildCount(); i < c; i++) { 118589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project updateChildAlignments(getChildAt(i)); 118689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 118789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 118889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 118989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private boolean needsAppendVisibleItem() { 119089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mLastVisiblePos < mFocusPosition) { 119189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return true; 119289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 119389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project int right = mScrollOffsetPrimary + mSizePrimary; 119489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project for (int i = 0; i < mNumRows; i++) { 119589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mRows[i].low == mRows[i].high) { 119689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mRows[i].high < right) { 119789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return true; 119889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 119989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else if (mRows[i].high < right - mMarginPrimary) { 120089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return true; 120189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 120289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 120389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return false; 120489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 120589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 120689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private boolean needsPrependVisibleItem() { 1207c2f1f07084818942352c6bbfb36af9b6b330eb4eEric Laurent if (mFirstVisiblePos > mFocusPosition) { 120889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return true; 120989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 121089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project for (int i = 0; i < mNumRows; i++) { 121189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mRows[i].low == mRows[i].high) { 121289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mRows[i].low > mScrollOffsetPrimary) { 121389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return true; 121489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 121589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else if (mRows[i].low - mMarginPrimary > mScrollOffsetPrimary) { 121689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return true; 121789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 121889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 121989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return false; 122089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 1221d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent 122289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // Append one column if possible and return true if reach end. 122389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private boolean appendOneVisibleItem() { 122489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project while (true) { 122589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (mLastVisiblePos != NO_POSITION && mLastVisiblePos < mAdapter.getItemCount() -1 && 122689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mLastVisiblePos < mGrid.getLastIndex()) { 122789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // append invisible view of saved location till last row 122889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project final int index = mLastVisiblePos + 1; 122989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project final int row = mGrid.getLocation(index).row; 123089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mGridProvider.createItem(index, row, true); 123189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (row == mNumRows - 1) { 123289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return false; 123389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 1234d1b449aad6c087a69f5ec66b7facb2845b73f1cbEric Laurent } else if ((mLastVisiblePos == NO_POSITION && mAdapter.getItemCount() > 0) || 123589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project (mLastVisiblePos != NO_POSITION && 123689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mLastVisiblePos < mAdapter.getItemCount() - 1)) { 123789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project mGrid.appendItems(mScrollOffsetPrimary + mSizePrimary); 123889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return false; 123989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } else { 124089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project return true; 124189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 124289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 124389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 124489fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 124589fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project private void appendVisibleItems() { 124689fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project while (needsAppendVisibleItem()) { 124789fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project if (appendOneVisibleItem()) { 124889fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project break; 124989fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 125089fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 125189fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project } 125289fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project 125389fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5The Android Open Source Project // Prepend one column if possible and return true if reach end. 1254 private boolean prependOneVisibleItem() { 1255 while (true) { 1256 if (mFirstVisiblePos > 0) { 1257 if (mFirstVisiblePos > mGrid.getFirstIndex()) { 1258 // prepend invisible view of saved location till first row 1259 final int index = mFirstVisiblePos - 1; 1260 final int row = mGrid.getLocation(index).row; 1261 mGridProvider.createItem(index, row, false); 1262 if (row == 0) { 1263 return false; 1264 } 1265 } else { 1266 mGrid.prependItems(mScrollOffsetPrimary); 1267 return false; 1268 } 1269 } else { 1270 return true; 1271 } 1272 } 1273 } 1274 1275 private void prependVisibleItems() { 1276 while (needsPrependVisibleItem()) { 1277 if (prependOneVisibleItem()) { 1278 break; 1279 } 1280 } 1281 } 1282 1283 private void removeChildAt(int position) { 1284 View v = getViewByPosition(position); 1285 if (v != null) { 1286 if (DEBUG) { 1287 Log.d(getTag(), "removeAndRecycleViewAt " + position); 1288 } 1289 ((LayoutParams) v.getLayoutParams()).onViewDetached(); 1290 removeAndRecycleViewAt(getIndexByPosition(position), mRecycler); 1291 } 1292 } 1293 1294 private void removeInvisibleViewsAtEnd() { 1295 boolean update = false; 1296 while(mLastVisiblePos > mFirstVisiblePos && mLastVisiblePos > mFocusPosition) { 1297 View view = getViewByPosition(mLastVisiblePos); 1298 if (getViewMin(view) > mSizePrimary) { 1299 removeChildAt(mLastVisiblePos); 1300 mLastVisiblePos--; 1301 update = true; 1302 } else { 1303 break; 1304 } 1305 } 1306 if (update) { 1307 updateRowsMinMax(); 1308 } 1309 } 1310 1311 private void removeInvisibleViewsAtFront() { 1312 boolean update = false; 1313 while(mLastVisiblePos > mFirstVisiblePos && mFirstVisiblePos < mFocusPosition) { 1314 View view = getViewByPosition(mFirstVisiblePos); 1315 if (getViewMax(view) < 0) { 1316 removeChildAt(mFirstVisiblePos); 1317 mFirstVisiblePos++; 1318 update = true; 1319 } else { 1320 break; 1321 } 1322 } 1323 if (update) { 1324 updateRowsMinMax(); 1325 } 1326 } 1327 1328 private void updateRowsMinMax() { 1329 if (mFirstVisiblePos < 0) { 1330 return; 1331 } 1332 for (int i = 0; i < mNumRows; i++) { 1333 mRows[i].low = Integer.MAX_VALUE; 1334 mRows[i].high = Integer.MIN_VALUE; 1335 } 1336 for (int i = mFirstVisiblePos; i <= mLastVisiblePos; i++) { 1337 View view = getViewByPosition(i); 1338 int row = mGrid.getLocation(i).row; 1339 int low = getViewMin(view) + mScrollOffsetPrimary; 1340 if (low < mRows[row].low) { 1341 mRows[row].low = low; 1342 } 1343 int high = getViewMax(view) + mScrollOffsetPrimary; 1344 if (high > mRows[row].high) { 1345 mRows[row].high = high; 1346 } 1347 } 1348 } 1349 1350 // Fast layout when there is no structure change, adapter change, etc. 1351 protected void fastRelayout() { 1352 initScrollController(); 1353 1354 List<Integer>[] rows = mGrid.getItemPositionsInRows(mFirstVisiblePos, mLastVisiblePos); 1355 1356 // relayout and repositioning views on each row 1357 for (int i = 0; i < mNumRows; i++) { 1358 List<Integer> row = rows[i]; 1359 final int startSecondary = getRowStartSecondary(i) - mScrollOffsetSecondary; 1360 for (int j = 0, size = row.size(); j < size; j++) { 1361 final int position = row.get(j); 1362 final View view = getViewByPosition(position); 1363 final boolean layoutForward = getIsViewLayoutForward(view); 1364 int primaryDelta, start, end; 1365 1366 if (mOrientation == HORIZONTAL) { 1367 final int primarySize = view.getMeasuredWidth(); 1368 if (view.isLayoutRequested()) { 1369 measureChild(view, i); 1370 } 1371 if (layoutForward) { 1372 start = getViewMin(view); 1373 end = start + view.getMeasuredWidth(); 1374 primaryDelta = view.getMeasuredWidth() - primarySize; 1375 if (primaryDelta != 0) { 1376 for (int k = j + 1; k < size; k++) { 1377 getViewByPosition(row.get(k)).offsetLeftAndRight(primaryDelta); 1378 } 1379 } 1380 } else { 1381 end = getViewMax(view); 1382 start = end - view.getMeasuredWidth(); 1383 primaryDelta = primarySize - view.getMeasuredWidth(); 1384 if (primaryDelta != 0) { 1385 for (int k = 0; k < j; k++) { 1386 getViewByPosition(row.get(k)).offsetLeftAndRight(primaryDelta); 1387 } 1388 } 1389 } 1390 } else { 1391 final int primarySize = view.getMeasuredHeight(); 1392 if (view.isLayoutRequested()) { 1393 measureChild(view, i); 1394 } 1395 if (layoutForward) { 1396 start = getViewMin(view); 1397 end = start + view.getMeasuredHeight(); 1398 primaryDelta = view.getMeasuredHeight() - primarySize; 1399 if (primaryDelta != 0) { 1400 for (int k = j + 1; k < size; k++) { 1401 getViewByPosition(row.get(k)).offsetTopAndBottom(primaryDelta); 1402 } 1403 } 1404 } else { 1405 end = getViewMax(view); 1406 start = end - view.getMeasuredHeight(); 1407 primaryDelta = primarySize - view.getMeasuredHeight(); 1408 if (primaryDelta != 0) { 1409 for (int k = 0; k < j; k++) { 1410 getViewByPosition(row.get(k)).offsetTopAndBottom(primaryDelta); 1411 } 1412 } 1413 } 1414 } 1415 layoutChild(i, view, start, end, startSecondary); 1416 } 1417 } 1418 1419 appendVisibleItems(); 1420 prependVisibleItems(); 1421 1422 updateRowsMinMax(); 1423 updateScrollMin(); 1424 updateScrollMax(); 1425 updateScrollSecondAxis(); 1426 1427 if (mFocusScrollStrategy == BaseGridView.FOCUS_SCROLL_ALIGNED) { 1428 View focusView = getViewByPosition(mFocusPosition == NO_POSITION ? 0 : mFocusPosition); 1429 scrollToView(focusView, false); 1430 } 1431 } 1432 1433 // Lays out items based on the current scroll position 1434 @Override 1435 public void onLayoutChildren(RecyclerView.Adapter adapter, RecyclerView.Recycler recycler, 1436 boolean structureChanged, RecyclerView.State state) { 1437 if (DEBUG) { 1438 Log.v(getTag(), "layoutChildren start numRows " + mNumRows + " mScrollOffsetSecondary " 1439 + mScrollOffsetSecondary + " mScrollOffsetPrimary " + mScrollOffsetPrimary 1440 + " structureChanged " + structureChanged 1441 + " mForceFullLayout " + mForceFullLayout); 1442 Log.v(getTag(), "width " + getWidth() + " height " + getHeight()); 1443 } 1444 1445 if (mNumRows == 0) { 1446 // haven't done measure yet 1447 return; 1448 } 1449 final int itemCount = adapter.getItemCount(); 1450 if (itemCount < 0) { 1451 return; 1452 } 1453 1454 mInLayout = true; 1455 1456 // Track the old focus view so we can adjust our system scroll position 1457 // so that any scroll animations happening now will remain valid. 1458 int delta = 0, deltaSecondary = 0; 1459 if (mFocusPosition != NO_POSITION 1460 && mFocusScrollStrategy == BaseGridView.FOCUS_SCROLL_ALIGNED) { 1461 View focusView = getViewByPosition(mFocusPosition); 1462 if (focusView != null) { 1463 delta = mWindowAlignment.mainAxis().getSystemScrollPos( 1464 getViewCenter(focusView) + mScrollOffsetPrimary) - mScrollOffsetPrimary; 1465 deltaSecondary = 1466 mWindowAlignment.secondAxis().getSystemScrollPos( 1467 getViewCenterSecondary(focusView) + mScrollOffsetSecondary) 1468 - mScrollOffsetSecondary; 1469 } 1470 } 1471 1472 boolean hasDoneFirstLayout = hasDoneFirstLayout(); 1473 if (!structureChanged && !mForceFullLayout && hasDoneFirstLayout) { 1474 fastRelayout(); 1475 } else { 1476 boolean hadFocus = mBaseGridView.hasFocus(); 1477 1478 int newFocusPosition = init(adapter, recycler, mFocusPosition); 1479 if (DEBUG) { 1480 Log.v(getTag(), "mFocusPosition " + mFocusPosition + " newFocusPosition " 1481 + newFocusPosition); 1482 } 1483 1484 // depending on result of init(), either recreating everything 1485 // or try to reuse the row start positions near mFocusPosition 1486 if (mGrid.getSize() == 0) { 1487 // this is a fresh creating all items, starting from 1488 // mFocusPosition with a estimated row index. 1489 mGrid.setStart(newFocusPosition, StaggeredGrid.START_DEFAULT); 1490 1491 // Can't track the old focus view 1492 delta = deltaSecondary = 0; 1493 1494 } else { 1495 // mGrid remembers Locations for the column that 1496 // contains mFocusePosition and also mRows remembers start 1497 // positions of each row. 1498 // Manually re-create child views for that column 1499 int firstIndex = mGrid.getFirstIndex(); 1500 int lastIndex = mGrid.getLastIndex(); 1501 for (int i = firstIndex; i <= lastIndex; i++) { 1502 mGridProvider.createItem(i, mGrid.getLocation(i).row, true); 1503 } 1504 } 1505 // add visible views at end until reach the end of window 1506 appendVisibleItems(); 1507 // add visible views at front until reach the start of window 1508 prependVisibleItems(); 1509 // multiple rounds: scrollToView of first round may drag first/last child into 1510 // "visible window" and we update scrollMin/scrollMax then run second scrollToView 1511 int oldFirstVisible; 1512 int oldLastVisible; 1513 do { 1514 oldFirstVisible = mFirstVisiblePos; 1515 oldLastVisible = mLastVisiblePos; 1516 View focusView = getViewByPosition(newFocusPosition); 1517 // we need force to initialize the child view's position 1518 scrollToView(focusView, false); 1519 if (focusView != null && hadFocus) { 1520 focusView.requestFocus(); 1521 } 1522 appendVisibleItems(); 1523 prependVisibleItems(); 1524 removeInvisibleViewsAtFront(); 1525 removeInvisibleViewsAtEnd(); 1526 } while (mFirstVisiblePos != oldFirstVisible || mLastVisiblePos != oldLastVisible); 1527 } 1528 mForceFullLayout = false; 1529 1530 if (mFocusScrollStrategy == BaseGridView.FOCUS_SCROLL_ALIGNED) { 1531 scrollDirectionPrimary(-delta); 1532 scrollDirectionSecondary(-deltaSecondary); 1533 } 1534 appendVisibleItems(); 1535 prependVisibleItems(); 1536 removeInvisibleViewsAtFront(); 1537 removeInvisibleViewsAtEnd(); 1538 1539 if (DEBUG) { 1540 StringWriter sw = new StringWriter(); 1541 PrintWriter pw = new PrintWriter(sw); 1542 mGrid.debugPrint(pw); 1543 Log.d(getTag(), sw.toString()); 1544 } 1545 1546 removeAndRecycleScrap(recycler); 1547 attemptAnimateLayoutChild(); 1548 1549 if (mRowSecondarySizeRefresh) { 1550 mRowSecondarySizeRefresh = false; 1551 } else { 1552 updateRowSecondarySizeRefresh(); 1553 } 1554 1555 if (!hasDoneFirstLayout) { 1556 dispatchChildSelected(); 1557 } 1558 mInLayout = false; 1559 if (DEBUG) Log.v(getTag(), "layoutChildren end"); 1560 } 1561 1562 private void offsetChildrenSecondary(int increment) { 1563 final int childCount = getChildCount(); 1564 if (mOrientation == HORIZONTAL) { 1565 for (int i = 0; i < childCount; i++) { 1566 getChildAt(i).offsetTopAndBottom(increment); 1567 } 1568 } else { 1569 for (int i = 0; i < childCount; i++) { 1570 getChildAt(i).offsetLeftAndRight(increment); 1571 } 1572 } 1573 mScrollOffsetSecondary -= increment; 1574 } 1575 1576 private void offsetChildrenPrimary(int increment) { 1577 final int childCount = getChildCount(); 1578 if (mOrientation == VERTICAL) { 1579 for (int i = 0; i < childCount; i++) { 1580 getChildAt(i).offsetTopAndBottom(increment); 1581 } 1582 } else { 1583 for (int i = 0; i < childCount; i++) { 1584 getChildAt(i).offsetLeftAndRight(increment); 1585 } 1586 } 1587 mScrollOffsetPrimary -= increment; 1588 } 1589 1590 @Override 1591 public int scrollHorizontallyBy(int dx, Adapter adapter, Recycler recycler, 1592 RecyclerView.State state) { 1593 if (DEBUG) Log.v(TAG, "scrollHorizontallyBy " + dx); 1594 1595 if (mOrientation == HORIZONTAL) { 1596 return scrollDirectionPrimary(dx); 1597 } else { 1598 return scrollDirectionSecondary(dx); 1599 } 1600 } 1601 1602 @Override 1603 public int scrollVerticallyBy(int dy, Adapter adapter, Recycler recycler, 1604 RecyclerView.State state) { 1605 if (DEBUG) Log.v(TAG, "scrollVerticallyBy " + dy); 1606 if (mOrientation == VERTICAL) { 1607 return scrollDirectionPrimary(dy); 1608 } else { 1609 return scrollDirectionSecondary(dy); 1610 } 1611 } 1612 1613 // scroll in main direction may add/prune views 1614 private int scrollDirectionPrimary(int da) { 1615 offsetChildrenPrimary(-da); 1616 if (mInLayout) { 1617 return da; 1618 } 1619 1620 int childCount = getChildCount(); 1621 boolean updated; 1622 1623 if (da > 0) { 1624 appendVisibleItems(); 1625 } else if (da < 0) { 1626 prependVisibleItems(); 1627 } 1628 updated = getChildCount() > childCount; 1629 childCount = getChildCount(); 1630 1631 if (da > 0) { 1632 removeInvisibleViewsAtFront(); 1633 } else if (da < 0) { 1634 removeInvisibleViewsAtEnd(); 1635 } 1636 updated |= getChildCount() < childCount; 1637 1638 attemptAnimateLayoutChild(); 1639 if (updated) { 1640 updateRowSecondarySizeRefresh(); 1641 } 1642 1643 mBaseGridView.invalidate(); 1644 return da; 1645 } 1646 1647 // scroll in second direction will not add/prune views 1648 private int scrollDirectionSecondary(int dy) { 1649 offsetChildrenSecondary(-dy); 1650 mBaseGridView.invalidate(); 1651 return dy; 1652 } 1653 1654 private void updateScrollMax() { 1655 if (mLastVisiblePos >= 0 && mLastVisiblePos == mAdapter.getItemCount() - 1) { 1656 int maxEdge = Integer.MIN_VALUE; 1657 for (int i = 0; i < mRows.length; i++) { 1658 if (mRows[i].high > maxEdge) { 1659 maxEdge = mRows[i].high; 1660 } 1661 } 1662 mWindowAlignment.mainAxis().setMaxEdge(maxEdge); 1663 if (DEBUG) Log.v(getTag(), "updating scroll maxEdge to " + maxEdge); 1664 } 1665 } 1666 1667 private void updateScrollMin() { 1668 if (mFirstVisiblePos == 0) { 1669 int minEdge = Integer.MAX_VALUE; 1670 for (int i = 0; i < mRows.length; i++) { 1671 if (mRows[i].low < minEdge) { 1672 minEdge = mRows[i].low; 1673 } 1674 } 1675 mWindowAlignment.mainAxis().setMinEdge(minEdge); 1676 if (DEBUG) Log.v(getTag(), "updating scroll minEdge to " + minEdge); 1677 } 1678 } 1679 1680 private void updateScrollSecondAxis() { 1681 mWindowAlignment.secondAxis().setMinEdge(0); 1682 mWindowAlignment.secondAxis().setMaxEdge(getSizeSecondary()); 1683 } 1684 1685 private void initScrollController() { 1686 mWindowAlignment.horizontal.setSize(getWidth()); 1687 mWindowAlignment.horizontal.setPadding(getPaddingLeft(), getPaddingRight()); 1688 mWindowAlignment.vertical.setSize(getHeight()); 1689 mWindowAlignment.vertical.setPadding(getPaddingTop(), getPaddingBottom()); 1690 mSizePrimary = mWindowAlignment.mainAxis().getSize(); 1691 mWindowAlignment.mainAxis().invalidateScrollMin(); 1692 mWindowAlignment.mainAxis().invalidateScrollMax(); 1693 1694 if (DEBUG) { 1695 Log.v(getTag(), "initScrollController mSizePrimary " + mSizePrimary 1696 + " mWindowAlignment " + mWindowAlignment); 1697 } 1698 } 1699 1700 public void setSelection(RecyclerView parent, int position) { 1701 setSelection(parent, position, false); 1702 } 1703 1704 public void setSelectionSmooth(RecyclerView parent, int position) { 1705 setSelection(parent, position, true); 1706 } 1707 1708 public int getSelection() { 1709 return mFocusPosition; 1710 } 1711 1712 public void setSelection(RecyclerView parent, int position, boolean smooth) { 1713 if (mFocusPosition == position) { 1714 return; 1715 } 1716 View view = getViewByPosition(position); 1717 if (view != null) { 1718 scrollToView(view, smooth); 1719 } else { 1720 boolean right = position > mFocusPosition; 1721 mFocusPosition = position; 1722 if (smooth) { 1723 if (!hasDoneFirstLayout()) { 1724 Log.w(getTag(), "setSelectionSmooth should " + 1725 "not be called before first layout pass"); 1726 return; 1727 } 1728 if (right) { 1729 appendVisibleItems(); 1730 } else { 1731 prependVisibleItems(); 1732 } 1733 scrollToView(getViewByPosition(position), smooth); 1734 } else { 1735 mForceFullLayout = true; 1736 parent.requestLayout(); 1737 } 1738 } 1739 } 1740 1741 @Override 1742 public void onItemsAdded(RecyclerView recyclerView, int positionStart, int itemCount) { 1743 boolean needsLayout = false; 1744 if (itemCount != 0) { 1745 if (mFirstVisiblePos < 0) { 1746 needsLayout = true; 1747 } else if (!(positionStart > mLastVisiblePos + 1 || 1748 positionStart + itemCount < mFirstVisiblePos - 1)) { 1749 needsLayout = true; 1750 } 1751 } 1752 if (needsLayout) { 1753 recyclerView.requestLayout(); 1754 } 1755 } 1756 1757 @Override 1758 public boolean onRequestChildFocus(RecyclerView parent, View child, View focused) { 1759 if (mFocusSearchDisabled) { 1760 return true; 1761 } 1762 if (!mInLayout) { 1763 scrollToView(child, true); 1764 } 1765 return true; 1766 } 1767 1768 @Override 1769 public boolean requestChildRectangleOnScreen(RecyclerView parent, View view, Rect rect, 1770 boolean immediate) { 1771 if (DEBUG) Log.v(getTag(), "requestChildRectangleOnScreen " + view + " " + rect); 1772 return false; 1773 } 1774 1775 int getScrollOffsetX() { 1776 return mOrientation == HORIZONTAL ? mScrollOffsetPrimary : mScrollOffsetSecondary; 1777 } 1778 1779 int getScrollOffsetY() { 1780 return mOrientation == HORIZONTAL ? mScrollOffsetSecondary : mScrollOffsetPrimary; 1781 } 1782 1783 public void getViewSelectedOffsets(View view, int[] offsets) { 1784 int scrollOffsetX = getScrollOffsetX(); 1785 int scrollOffsetY = getScrollOffsetY(); 1786 int viewCenterX = scrollOffsetX + getViewCenterX(view); 1787 int viewCenterY = scrollOffsetY + getViewCenterY(view); 1788 offsets[0] = mWindowAlignment.horizontal.getSystemScrollPos(viewCenterX) - scrollOffsetX; 1789 offsets[1] = mWindowAlignment.vertical.getSystemScrollPos(viewCenterY) - scrollOffsetY; 1790 } 1791 1792 /** 1793 * Scroll to a given child view and change mFocusPosition. 1794 */ 1795 private void scrollToView(View view, boolean smooth) { 1796 int newFocusPosition = getPositionByView(view); 1797 if (mInLayout || newFocusPosition != mFocusPosition) { 1798 mFocusPosition = newFocusPosition; 1799 dispatchChildSelected(); 1800 } 1801 if (mBaseGridView.isChildrenDrawingOrderEnabledInternal()) { 1802 mBaseGridView.invalidate(); 1803 } 1804 if (view == null) { 1805 return; 1806 } 1807 if (!view.hasFocus() && mBaseGridView.hasFocus()) { 1808 // transfer focus to the child if it does not have focus yet (e.g. triggered 1809 // by setSelection()) 1810 view.requestFocus(); 1811 } 1812 switch (mFocusScrollStrategy) { 1813 case BaseGridView.FOCUS_SCROLL_ALIGNED: 1814 default: 1815 scrollToAlignedPosition(view, smooth); 1816 break; 1817 case BaseGridView.FOCUS_SCROLL_ITEM: 1818 case BaseGridView.FOCUS_SCROLL_PAGE: 1819 scrollItemOrPage(view, smooth); 1820 break; 1821 } 1822 } 1823 1824 private void scrollItemOrPage(View view, boolean smooth) { 1825 int pos = getPositionByView(view); 1826 int viewMin = getViewMin(view); 1827 int viewMax = getViewMax(view); 1828 // we either align "firstView" to left/top padding edge 1829 // or align "lastView" to right/bottom padding edge 1830 View firstView = null; 1831 View lastView = null; 1832 int paddingLow = mWindowAlignment.mainAxis().getPaddingLow(); 1833 int clientSize = mWindowAlignment.mainAxis().getClientSize(); 1834 final int row = mGrid.getLocation(pos).row; 1835 if (viewMin < paddingLow) { 1836 // view enters low padding area: 1837 firstView = view; 1838 if (mFocusScrollStrategy == BaseGridView.FOCUS_SCROLL_PAGE) { 1839 // scroll one "page" left/top, 1840 // align first visible item of the "page" at the low padding edge. 1841 while (!prependOneVisibleItem()) { 1842 List<Integer> positions = 1843 mGrid.getItemPositionsInRows(mFirstVisiblePos, pos)[row]; 1844 firstView = getViewByPosition(positions.get(0)); 1845 if (viewMax - getViewMin(firstView) > clientSize) { 1846 if (positions.size() > 1) { 1847 firstView = getViewByPosition(positions.get(1)); 1848 } 1849 break; 1850 } 1851 } 1852 } 1853 } else if (viewMax > clientSize + paddingLow) { 1854 // view enters high padding area: 1855 if (mFocusScrollStrategy == BaseGridView.FOCUS_SCROLL_PAGE) { 1856 // scroll whole one page right/bottom, align view at the low padding edge. 1857 firstView = view; 1858 do { 1859 List<Integer> positions = 1860 mGrid.getItemPositionsInRows(pos, mLastVisiblePos)[row]; 1861 lastView = getViewByPosition(positions.get(positions.size() - 1)); 1862 if (getViewMax(lastView) - viewMin > clientSize) { 1863 lastView = null; 1864 break; 1865 } 1866 } while (!appendOneVisibleItem()); 1867 if (lastView != null) { 1868 // however if we reached end, we should align last view. 1869 firstView = null; 1870 } 1871 } else { 1872 lastView = view; 1873 } 1874 } 1875 int scrollPrimary = 0; 1876 int scrollSecondary = 0; 1877 if (firstView != null) { 1878 scrollPrimary = getViewMin(firstView) - paddingLow; 1879 } else if (lastView != null) { 1880 scrollPrimary = getViewMax(lastView) - (paddingLow + clientSize); 1881 } 1882 View secondaryAlignedView; 1883 if (firstView != null) { 1884 secondaryAlignedView = firstView; 1885 } else if (lastView != null) { 1886 secondaryAlignedView = lastView; 1887 } else { 1888 secondaryAlignedView = view; 1889 } 1890 int viewCenterSecondary = mScrollOffsetSecondary + 1891 getViewCenterSecondary(secondaryAlignedView); 1892 mWindowAlignment.secondAxis().updateScrollCenter(viewCenterSecondary); 1893 scrollSecondary = mWindowAlignment.secondAxis().getSystemScrollPos(); 1894 scrollSecondary -= mScrollOffsetSecondary; 1895 scrollGrid(scrollPrimary, scrollSecondary, smooth); 1896 } 1897 1898 private void scrollToAlignedPosition(View view, boolean smooth) { 1899 int viewCenterPrimary = mScrollOffsetPrimary + getViewCenter(view); 1900 int viewCenterSecondary = mScrollOffsetSecondary + getViewCenterSecondary(view); 1901 if (DEBUG) { 1902 Log.v(getTag(), "scrollAligned smooth=" + smooth + " pos=" + mFocusPosition + " " 1903 + viewCenterPrimary +","+viewCenterSecondary + " " + mWindowAlignment); 1904 } 1905 1906 if (mInLayout || viewCenterPrimary != mWindowAlignment.mainAxis().getScrollCenter() 1907 || viewCenterSecondary != mWindowAlignment.secondAxis().getScrollCenter()) { 1908 mWindowAlignment.mainAxis().updateScrollCenter(viewCenterPrimary); 1909 mWindowAlignment.secondAxis().updateScrollCenter(viewCenterSecondary); 1910 int scrollPrimary = mWindowAlignment.mainAxis().getSystemScrollPos(); 1911 int scrollSecondary = mWindowAlignment.secondAxis().getSystemScrollPos(); 1912 if (DEBUG) { 1913 Log.v(getTag(), "scrollAligned " + scrollPrimary + " " + scrollSecondary 1914 +" " + mWindowAlignment); 1915 } 1916 1917 scrollPrimary -= mScrollOffsetPrimary; 1918 scrollSecondary -= mScrollOffsetSecondary; 1919 1920 scrollGrid(scrollPrimary, scrollSecondary, smooth); 1921 } 1922 } 1923 1924 private void scrollGrid(int scrollPrimary, int scrollSecondary, boolean smooth) { 1925 if (mInLayout) { 1926 scrollDirectionPrimary(scrollPrimary); 1927 scrollDirectionSecondary(scrollSecondary); 1928 } else { 1929 int scrollX; 1930 int scrollY; 1931 if (mOrientation == HORIZONTAL) { 1932 scrollX = scrollPrimary; 1933 scrollY = scrollSecondary; 1934 } else { 1935 scrollX = scrollSecondary; 1936 scrollY = scrollPrimary; 1937 } 1938 if (smooth) { 1939 mBaseGridView.smoothScrollBy(scrollX, scrollY); 1940 } else { 1941 mBaseGridView.scrollBy(scrollX, scrollY); 1942 } 1943 } 1944 } 1945 1946 public void setAnimateChildLayout(boolean animateChildLayout) { 1947 mAnimateChildLayout = animateChildLayout; 1948 for (int i = 0, c = getChildCount(); i < c; i++) { 1949 View v = getChildAt(i); 1950 LayoutParams p = (LayoutParams) v.getLayoutParams(); 1951 if (!mAnimateChildLayout) { 1952 p.endAnimate(); 1953 } else { 1954 // record initial location values 1955 p.mFirstAttached = true; 1956 p.startAnimate(this, v, 0); 1957 } 1958 } 1959 } 1960 1961 private void attemptAnimateLayoutChild() { 1962 if (!mAnimateChildLayout) { 1963 return; 1964 } 1965 for (int i = 0, c = getChildCount(); i < c; i++) { 1966 // TODO: start delay can be staggered 1967 View v = getChildAt(i); 1968 ((LayoutParams) v.getLayoutParams()).startAnimate(this, v, 0); 1969 } 1970 } 1971 1972 public boolean isChildLayoutAnimated() { 1973 return mAnimateChildLayout; 1974 } 1975 1976 public void setChildLayoutAnimationInterpolator(Interpolator interpolator) { 1977 mAnimateLayoutChildInterpolator = interpolator; 1978 } 1979 1980 public Interpolator getChildLayoutAnimationInterpolator() { 1981 return mAnimateLayoutChildInterpolator; 1982 } 1983 1984 public void setChildLayoutAnimationDuration(long duration) { 1985 mAnimateLayoutChildDuration = duration; 1986 } 1987 1988 public long getChildLayoutAnimationDuration() { 1989 return mAnimateLayoutChildDuration; 1990 } 1991 1992 private int findImmediateChildIndex(View view) { 1993 while (view != null && view != mBaseGridView) { 1994 int index = mBaseGridView.indexOfChild(view); 1995 if (index >= 0) { 1996 return index; 1997 } 1998 view = (View) view.getParent(); 1999 } 2000 return NO_POSITION; 2001 } 2002 2003 void setFocusSearchDisabled(boolean disabled) { 2004 mFocusSearchDisabled = disabled; 2005 } 2006 2007 boolean isFocusSearchDisabled() { 2008 return mFocusSearchDisabled; 2009 } 2010 2011 @Override 2012 public View onInterceptFocusSearch(View focused, int direction) { 2013 if (mFocusSearchDisabled) { 2014 return focused; 2015 } 2016 return null; 2017 } 2018 2019 @Override 2020 public boolean onAddFocusables(RecyclerView recyclerView, 2021 ArrayList<View> views, int direction, int focusableMode) { 2022 if (mFocusSearchDisabled) { 2023 return true; 2024 } 2025 // If this viewgroup or one of its children currently has focus then we 2026 // consider our children for focus searching in main direction on the same row. 2027 // If this viewgroup has no focus and using focus align, we want the system 2028 // to ignore our children and pass focus to the viewgroup, which will pass 2029 // focus on to its children appropriately. 2030 // If this viewgroup has no focus and not using focus align, we want to 2031 // consider the child that does not overlap with padding area. 2032 if (recyclerView.hasFocus()) { 2033 final int movement = getMovement(direction); 2034 if (movement != PREV_ITEM && movement != NEXT_ITEM) { 2035 // Move on secondary direction uses default addFocusables(). 2036 return false; 2037 } 2038 final View focused = recyclerView.findFocus(); 2039 final int focusedPos = getPositionByIndex(findImmediateChildIndex(focused)); 2040 // Add focusables of focused item. 2041 if (focusedPos != NO_POSITION) { 2042 getViewByPosition(focusedPos).addFocusables(views, direction, focusableMode); 2043 } 2044 final int focusedRow = mGrid != null && focusedPos != NO_POSITION ? 2045 mGrid.getLocation(focusedPos).row : NO_POSITION; 2046 // Add focusables of next neighbor of same row on the focus search direction. 2047 if (mGrid != null) { 2048 final int focusableCount = views.size(); 2049 for (int i = 0, count = getChildCount(); i < count; i++) { 2050 int index = movement == NEXT_ITEM ? i : count - 1 - i; 2051 final View child = getChildAt(index); 2052 if (child.getVisibility() != View.VISIBLE) { 2053 continue; 2054 } 2055 int position = getPositionByIndex(index); 2056 StaggeredGrid.Location loc = mGrid.getLocation(position); 2057 if (focusedRow == NO_POSITION || (loc != null && loc.row == focusedRow)) { 2058 if (focusedPos == NO_POSITION || 2059 (movement == NEXT_ITEM && position > focusedPos) 2060 || (movement == PREV_ITEM && position < focusedPos)) { 2061 child.addFocusables(views, direction, focusableMode); 2062 if (views.size() > focusableCount) { 2063 break; 2064 } 2065 } 2066 } 2067 } 2068 } 2069 } else { 2070 if (mFocusScrollStrategy != BaseGridView.FOCUS_SCROLL_ALIGNED) { 2071 // adding views not overlapping padding area to avoid scrolling in gaining focus 2072 int left = mWindowAlignment.mainAxis().getPaddingLow(); 2073 int right = mWindowAlignment.mainAxis().getClientSize() + left; 2074 int focusableCount = views.size(); 2075 for (int i = 0, count = getChildCount(); i < count; i++) { 2076 View child = getChildAt(i); 2077 if (child.getVisibility() == View.VISIBLE) { 2078 if (getViewMin(child) >= left && getViewMax(child) <= right) { 2079 child.addFocusables(views, direction, focusableMode); 2080 } 2081 } 2082 } 2083 // if we cannot find any, then just add all children. 2084 if (views.size() == focusableCount) { 2085 for (int i = 0, count = getChildCount(); i < count; i++) { 2086 View child = getChildAt(i); 2087 if (child.getVisibility() == View.VISIBLE) { 2088 child.addFocusables(views, direction, focusableMode); 2089 } 2090 } 2091 if (views.size() != focusableCount) { 2092 return true; 2093 } 2094 } else { 2095 return true; 2096 } 2097 // if still cannot find any, fall through and add itself 2098 } 2099 if (recyclerView.isFocusable()) { 2100 views.add(recyclerView); 2101 } 2102 } 2103 return true; 2104 } 2105 2106 @Override 2107 public View onFocusSearchFailed(View focused, int direction, Adapter adapter, 2108 Recycler recycler) { 2109 if (DEBUG) Log.v(getTag(), "onFocusSearchFailed direction " + direction); 2110 2111 View view = null; 2112 int movement = getMovement(direction); 2113 final FocusFinder ff = FocusFinder.getInstance(); 2114 if (movement == NEXT_ITEM) { 2115 while (view == null && !appendOneVisibleItem()) { 2116 view = ff.findNextFocus(mBaseGridView, focused, direction); 2117 } 2118 } else if (movement == PREV_ITEM){ 2119 while (view == null && !prependOneVisibleItem()) { 2120 view = ff.findNextFocus(mBaseGridView, focused, direction); 2121 } 2122 } 2123 if (view == null) { 2124 // returning the same view to prevent focus lost when scrolling past the end of the list 2125 if (movement == PREV_ITEM) { 2126 view = mFocusOutFront ? null : focused; 2127 } else if (movement == NEXT_ITEM){ 2128 view = mFocusOutEnd ? null : focused; 2129 } 2130 } 2131 if (DEBUG) Log.v(getTag(), "returning view " + view); 2132 return view; 2133 } 2134 2135 boolean gridOnRequestFocusInDescendants(RecyclerView recyclerView, int direction, 2136 Rect previouslyFocusedRect) { 2137 switch (mFocusScrollStrategy) { 2138 case BaseGridView.FOCUS_SCROLL_ALIGNED: 2139 default: 2140 return gridOnRequestFocusInDescendantsAligned(recyclerView, 2141 direction, previouslyFocusedRect); 2142 case BaseGridView.FOCUS_SCROLL_PAGE: 2143 case BaseGridView.FOCUS_SCROLL_ITEM: 2144 return gridOnRequestFocusInDescendantsUnaligned(recyclerView, 2145 direction, previouslyFocusedRect); 2146 } 2147 } 2148 2149 private boolean gridOnRequestFocusInDescendantsAligned(RecyclerView recyclerView, 2150 int direction, Rect previouslyFocusedRect) { 2151 View view = getViewByPosition(mFocusPosition); 2152 if (view != null) { 2153 boolean result = view.requestFocus(direction, previouslyFocusedRect); 2154 if (!result && DEBUG) { 2155 Log.w(getTag(), "failed to request focus on " + view); 2156 } 2157 return result; 2158 } 2159 return false; 2160 } 2161 2162 private boolean gridOnRequestFocusInDescendantsUnaligned(RecyclerView recyclerView, 2163 int direction, Rect previouslyFocusedRect) { 2164 // focus to view not overlapping padding area to avoid scrolling in gaining focus 2165 int index; 2166 int increment; 2167 int end; 2168 int count = getChildCount(); 2169 if ((direction & View.FOCUS_FORWARD) != 0) { 2170 index = 0; 2171 increment = 1; 2172 end = count; 2173 } else { 2174 index = count - 1; 2175 increment = -1; 2176 end = -1; 2177 } 2178 int left = mWindowAlignment.mainAxis().getPaddingLow(); 2179 int right = mWindowAlignment.mainAxis().getClientSize() + left; 2180 for (int i = index; i != end; i += increment) { 2181 View child = getChildAt(i); 2182 if (child.getVisibility() == View.VISIBLE) { 2183 if (getViewMin(child) >= left && getViewMax(child) <= right) { 2184 if (child.requestFocus(direction, previouslyFocusedRect)) { 2185 return true; 2186 } 2187 } 2188 } 2189 } 2190 return false; 2191 } 2192 2193 private final static int PREV_ITEM = 0; 2194 private final static int NEXT_ITEM = 1; 2195 private final static int PREV_ROW = 2; 2196 private final static int NEXT_ROW = 3; 2197 2198 private int getMovement(int direction) { 2199 int movement = View.FOCUS_LEFT; 2200 2201 if (mOrientation == HORIZONTAL) { 2202 switch(direction) { 2203 case View.FOCUS_LEFT: 2204 movement = PREV_ITEM; 2205 break; 2206 case View.FOCUS_RIGHT: 2207 movement = NEXT_ITEM; 2208 break; 2209 case View.FOCUS_UP: 2210 movement = PREV_ROW; 2211 break; 2212 case View.FOCUS_DOWN: 2213 movement = NEXT_ROW; 2214 break; 2215 } 2216 } else if (mOrientation == VERTICAL) { 2217 switch(direction) { 2218 case View.FOCUS_LEFT: 2219 movement = PREV_ROW; 2220 break; 2221 case View.FOCUS_RIGHT: 2222 movement = NEXT_ROW; 2223 break; 2224 case View.FOCUS_UP: 2225 movement = PREV_ITEM; 2226 break; 2227 case View.FOCUS_DOWN: 2228 movement = NEXT_ITEM; 2229 break; 2230 } 2231 } 2232 2233 return movement; 2234 } 2235 2236 int getChildDrawingOrder(RecyclerView recyclerView, int childCount, int i) { 2237 int focusIndex = getIndexByPosition(mFocusPosition); 2238 if (focusIndex == NO_POSITION) { 2239 return i; 2240 } 2241 // supposely 0 1 2 3 4 5 6 7 8 9, 4 is the center item 2242 // drawing order is 0 1 2 3 9 8 7 6 5 4 2243 if (i < focusIndex) { 2244 return i; 2245 } else if (i < childCount - 1) { 2246 return focusIndex + childCount - 1 - i; 2247 } else { 2248 return focusIndex; 2249 } 2250 } 2251 2252 @Override 2253 public void onAdapterChanged(RecyclerView.Adapter oldAdapter, 2254 RecyclerView.Adapter newAdapter) { 2255 mGrid = null; 2256 mRows = null; 2257 mRowSizeSecondary = null; 2258 mRowSecondarySizeRefresh = false; 2259 super.onAdapterChanged(oldAdapter, newAdapter); 2260 } 2261} 2262