AllAppsRecyclerView.java revision f819dc2bc782e93ac9ecc163a99af0da62821d31
193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung/* 293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * Copyright (C) 2015 The Android Open Source Project 393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * 493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * Licensed under the Apache License, Version 2.0 (the "License"); 593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * you may not use this file except in compliance with the License. 693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * You may obtain a copy of the License at 793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * 893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * http://www.apache.org/licenses/LICENSE-2.0 993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * 1093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * Unless required by applicable law or agreed to in writing, software 1193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * distributed under the License is distributed on an "AS IS" BASIS, 1293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * See the License for the specific language governing permissions and 1493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * limitations under the License. 1593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung */ 1693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chungpackage com.android.launcher3; 1793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 1893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chungimport android.animation.ObjectAnimator; 1993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chungimport android.content.Context; 2093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chungimport android.content.res.Resources; 2193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chungimport android.graphics.Canvas; 2293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chungimport android.graphics.Color; 2393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chungimport android.graphics.Paint; 2493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chungimport android.graphics.Rect; 2593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chungimport android.graphics.drawable.Drawable; 2693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chungimport android.support.v7.widget.RecyclerView; 2793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chungimport android.util.AttributeSet; 2893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chungimport android.view.MotionEvent; 29f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chungimport android.view.View; 3093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chungimport android.view.ViewConfiguration; 3193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 3293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chungimport java.util.List; 3393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 3493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung/** 3593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * A RecyclerView with custom fastscroll support. This is the main container for the all apps 3693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * icons. 3793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung */ 3893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chungpublic class AppsContainerRecyclerView extends RecyclerView 3993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung implements RecyclerView.OnItemTouchListener { 4093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 41aa2ab254ea6b59dfe4183015e76c31262036282dWinson Chung private static final float FAST_SCROLL_OVERLAY_Y_OFFSET_FACTOR = 1.5f; 42aa2ab254ea6b59dfe4183015e76c31262036282dWinson Chung 4393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung private AlphabeticalAppsList mApps; 4493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung private int mNumAppsPerRow; 4593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 46f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung private Drawable mScrollbar; 4793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung private Drawable mFastScrollerBg; 48f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung private Rect mVerticalScrollbarBounds = new Rect(); 4993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung private boolean mDraggingFastScroller; 5093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung private String mFastScrollSectionName; 5193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung private Paint mFastScrollTextPaint; 5293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung private Rect mFastScrollTextBounds = new Rect(); 5393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung private float mFastScrollAlpha; 5493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung private int mDownX; 5593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung private int mDownY; 5693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung private int mLastX; 5793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung private int mLastY; 58f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung private int mScrollbarWidth; 59f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung private int mScrollbarMinHeight; 60f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung private int mScrollbarInset; 6193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 6293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung public AppsContainerRecyclerView(Context context) { 6393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung this(context, null); 6493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 6593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 6693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung public AppsContainerRecyclerView(Context context, AttributeSet attrs) { 6793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung this(context, attrs, 0); 6893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 6993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 7093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung public AppsContainerRecyclerView(Context context, AttributeSet attrs, int defStyleAttr) { 7193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung this(context, attrs, defStyleAttr, 0); 7293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 7393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 7493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung public AppsContainerRecyclerView(Context context, AttributeSet attrs, int defStyleAttr, 7593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung int defStyleRes) { 7693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung super(context, attrs, defStyleAttr); 7793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 7893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung Resources res = context.getResources(); 7993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung int fastScrollerSize = res.getDimensionPixelSize(R.dimen.apps_view_fast_scroll_popup_size); 80f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mScrollbar = context.getDrawable(R.drawable.apps_list_scrollbar_thumb); 81f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mFastScrollerBg = context.getDrawable(R.drawable.apps_list_fastscroll_bg); 8293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung mFastScrollerBg.setBounds(0, 0, fastScrollerSize, fastScrollerSize); 8393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung mFastScrollTextPaint = new Paint(); 8493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung mFastScrollTextPaint.setColor(Color.WHITE); 8593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung mFastScrollTextPaint.setAntiAlias(true); 8693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung mFastScrollTextPaint.setTextSize(res.getDimensionPixelSize( 8793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung R.dimen.apps_view_fast_scroll_text_size)); 88f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mScrollbarWidth = res.getDimensionPixelSize(R.dimen.apps_view_fast_scroll_bar_width); 89f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mScrollbarMinHeight = 90f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung res.getDimensionPixelSize(R.dimen.apps_view_fast_scroll_bar_min_height); 91f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mScrollbarInset = 92f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung res.getDimensionPixelSize(R.dimen.apps_view_fast_scroll_scrubber_touch_inset); 9393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung setFastScrollerAlpha(getFastScrollerAlpha()); 9493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 9593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 9693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung /** 9793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * Sets the list of apps in this view, used to determine the fastscroll position. 9893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung */ 9993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung public void setApps(AlphabeticalAppsList apps) { 10093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung mApps = apps; 10193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 10293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 10393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung /** 10493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * Sets the number of apps per row in this recycler view. 10593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung */ 10693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung public void setNumAppsPerRow(int rowSize) { 10793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung mNumAppsPerRow = rowSize; 10893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 10993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 11093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung /** 11193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * Sets the fast scroller alpha. 11293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung */ 11393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung public void setFastScrollerAlpha(float alpha) { 11493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung mFastScrollAlpha = alpha; 11593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung invalidateFastScroller(); 11693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 11793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 11893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung /** 11993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * Gets the fast scroller alpha. 12093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung */ 12193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung public float getFastScrollerAlpha() { 12293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung return mFastScrollAlpha; 12393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 12493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 125f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung /** 126f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung * Returns the scroll bar width. 127f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung */ 128f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung public int getScrollbarWidth() { 129f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung return mScrollbarWidth; 130f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 131f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung 13293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung @Override 13393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung protected void onFinishInflate() { 13493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung addOnItemTouchListener(this); 13593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 13693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 13793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung @Override 13893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung protected void dispatchDraw(Canvas canvas) { 13993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung super.dispatchDraw(canvas); 140f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung drawVerticalScrubber(canvas); 141f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung drawFastScrollerPopup(canvas); 14293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 14393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 14493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung /** 14593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * We intercept the touch handling only to support fast scrolling when initiated from the 146f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung * scroll bar. Otherwise, we fall back to the default RecyclerView touch handling. 14793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung */ 14893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung @Override 14993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent ev) { 15093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung return handleTouchEvent(ev); 15193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 15293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 15393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung @Override 15493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung public void onTouchEvent(RecyclerView rv, MotionEvent ev) { 15593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung handleTouchEvent(ev); 15693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 15793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 15893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung /** 15993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * Handles the touch event and determines whether to show the fast scroller (or updates it if 16093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * it is already showing). 16193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung */ 16293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung private boolean handleTouchEvent(MotionEvent ev) { 16393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung ViewConfiguration config = ViewConfiguration.get(getContext()); 16493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 16593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung int action = ev.getAction(); 16693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung int x = (int) ev.getX(); 16793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung int y = (int) ev.getY(); 16893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung switch (action) { 16993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung case MotionEvent.ACTION_DOWN: 17093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung // Keep track of the down positions 17193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung mDownX = mLastX = x; 17293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung mDownY = mLastY = y; 17393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung stopScroll(); 17493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung break; 17593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung case MotionEvent.ACTION_MOVE: 17693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung // Check if we are scrolling 177f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung if (!mDraggingFastScroller && isPointNearScrollbar(mDownX, mDownY) && 17893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung Math.abs(y - mDownY) > config.getScaledTouchSlop()) { 17993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung getParent().requestDisallowInterceptTouchEvent(true); 18093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung mDraggingFastScroller = true; 18193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung animateFastScrollerVisibility(true); 18293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 18393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung if (mDraggingFastScroller) { 18493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung mLastX = x; 18593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung mLastY = y; 18693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 18793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung // Scroll to the right position, and update the section name 18893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung int top = getPaddingTop() + (mFastScrollerBg.getBounds().height() / 2); 18993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung int bottom = getHeight() - getPaddingBottom() - 19093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung (mFastScrollerBg.getBounds().height() / 2); 19193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung float boundedY = (float) Math.max(top, Math.min(bottom, y)); 19293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung mFastScrollSectionName = scrollToPositionAtProgress((boundedY - top) / 19393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung (bottom - top)); 19493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung invalidateFastScroller(); 19593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 19693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung break; 19793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung case MotionEvent.ACTION_UP: 19893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung case MotionEvent.ACTION_CANCEL: 19993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung mDraggingFastScroller = false; 20093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung animateFastScrollerVisibility(false); 20193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung break; 20293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 20393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung return mDraggingFastScroller; 20493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 20593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 20693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 20793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung /** 20893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * Animates the visibility of the fast scroller popup. 20993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung */ 21093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung private void animateFastScrollerVisibility(boolean visible) { 21193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung ObjectAnimator anim = ObjectAnimator.ofFloat(this, "fastScrollerAlpha", visible ? 1f : 0f); 21293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung anim.setDuration(visible ? 200 : 150); 21393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung anim.start(); 21493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 21593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 21693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung /** 217f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung * Returns whether a given point is near the scrollbar. 218f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung */ 219f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung private boolean isPointNearScrollbar(int x, int y) { 220f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung // Check if we are scrolling 221f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung updateVerticalScrollbarBounds(); 222f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mVerticalScrollbarBounds.inset(mScrollbarInset, mScrollbarInset); 223f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung return mVerticalScrollbarBounds.contains(x, y); 224f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 225f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung 226f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung /** 227f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung * Draws the fast scroller popup. 228f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung */ 229f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung private void drawFastScrollerPopup(Canvas canvas) { 230f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int x; 231f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int y; 232f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung boolean isRtl = (getResources().getConfiguration().getLayoutDirection() == 233f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung LAYOUT_DIRECTION_RTL); 234f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung 235f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung if (mFastScrollAlpha > 0f) { 236f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung // Calculate the position for the fast scroller popup 237f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung Rect bgBounds = mFastScrollerBg.getBounds(); 238f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung if (isRtl) { 239f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung x = getPaddingLeft() + getScrollBarSize(); 240f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } else { 241f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung x = getWidth() - getPaddingRight() - getScrollBarSize() - bgBounds.width(); 242f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 243f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung y = mLastY - (int) (FAST_SCROLL_OVERLAY_Y_OFFSET_FACTOR * bgBounds.height()); 244f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung y = Math.max(getPaddingTop(), Math.min(y, getHeight() - getPaddingBottom() - 245f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung bgBounds.height())); 246f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung 247f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung // Draw the fast scroller popup 248f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int restoreCount = canvas.save(Canvas.MATRIX_SAVE_FLAG); 249f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung canvas.translate(x, y); 250f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mFastScrollerBg.setAlpha((int) (mFastScrollAlpha * 255)); 251f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mFastScrollerBg.draw(canvas); 252f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mFastScrollTextPaint.setAlpha((int) (mFastScrollAlpha * 255)); 253f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mFastScrollTextPaint.getTextBounds(mFastScrollSectionName, 0, 254f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mFastScrollSectionName.length(), mFastScrollTextBounds); 255f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung canvas.drawText(mFastScrollSectionName, 256f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung (bgBounds.width() - mFastScrollTextBounds.width()) / 2, 257f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung bgBounds.height() - (bgBounds.height() - mFastScrollTextBounds.height()) / 2, 258f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mFastScrollTextPaint); 259f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung canvas.restoreToCount(restoreCount); 260f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 261f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 262f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung 263f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung /** 264f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung * Draws the vertical scrollbar. 265f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung */ 266f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung private void drawVerticalScrubber(Canvas canvas) { 267f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung updateVerticalScrollbarBounds(); 268f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung 269f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung // Draw the scroll bar 270f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int restoreCount = canvas.save(Canvas.MATRIX_SAVE_FLAG); 271f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung canvas.translate(mVerticalScrollbarBounds.left, mVerticalScrollbarBounds.top); 272f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mScrollbar.setBounds(0, 0, mScrollbarWidth, mVerticalScrollbarBounds.height()); 273f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mScrollbar.draw(canvas); 274f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung canvas.restoreToCount(restoreCount); 275f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 276f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung 277f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung /** 27893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * Invalidates the fast scroller popup. 27993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung */ 28093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung private void invalidateFastScroller() { 28193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung invalidate(getWidth() - getPaddingRight() - getScrollBarSize() - 28293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung mFastScrollerBg.getIntrinsicWidth(), 0, getWidth(), getHeight()); 28393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 28493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 28593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung /** 28693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung * Maps the progress (from 0..1) to the position that should be visible 28793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung */ 28893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung private String scrollToPositionAtProgress(float progress) { 28993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung List<AlphabeticalAppsList.SectionInfo> sections = mApps.getSections(); 29093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung // Get the total number of rows 291f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int rowCount = getNumRows(); 29293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 29393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung // Find the index of the first app in that row and scroll to that position 29493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung int rowAtProgress = (int) (progress * rowCount); 29593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung int appIndex = 0; 29693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung rowCount = 0; 29793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung for (AlphabeticalAppsList.SectionInfo info : sections) { 29893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung int numRowsInSection = (int) Math.ceil((float) info.numAppsInSection / mNumAppsPerRow); 29993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung if (rowCount + numRowsInSection > rowAtProgress) { 30093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung appIndex += (rowAtProgress - rowCount) * mNumAppsPerRow; 30193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung break; 30293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 30393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung rowCount += numRowsInSection; 30493f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung appIndex += info.numAppsInSection; 30593f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 30693f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung appIndex = Math.max(0, Math.min(mApps.getAppsWithoutSectionBreaks().size() - 1, appIndex)); 30793f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung AppInfo appInfo = mApps.getAppsWithoutSectionBreaks().get(appIndex); 30893f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung int sectionedAppIndex = mApps.getApps().indexOf(appInfo); 30993f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung scrollToPosition(sectionedAppIndex); 31093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung 31193f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung // Returns the section name of the row 31293f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung return mApps.getSectionNameForApp(appInfo); 31393f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung } 314f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung 315f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung /** 316f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung * Returns the bounds for the scrollbar. 317f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung */ 318f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung private void updateVerticalScrollbarBounds() { 319f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int x; 320f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int y; 321f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung boolean isRtl = (getResources().getConfiguration().getLayoutDirection() == 322f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung LAYOUT_DIRECTION_RTL); 323f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung 324f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung // Skip early if there are no items 325f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung if (mApps.getApps().isEmpty()) { 326f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mVerticalScrollbarBounds.setEmpty(); 327f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung return; 328f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 329f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung 330f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung // Find the index and height of the first visible row (all rows have the same height) 331f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int rowIndex = -1; 332f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int rowTopOffset = -1; 333f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int rowHeight = -1; 334f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int rowCount = getNumRows(); 335f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int childCount = getChildCount(); 336f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung for (int i = 0; i < childCount; i++) { 337f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung View child = getChildAt(i); 338f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int position = getChildPosition(child); 339f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung if (position != NO_POSITION) { 340f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung AppInfo info = mApps.getApps().get(position); 341f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung if (info != AlphabeticalAppsList.SECTION_BREAK_INFO) { 342f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int appIndex = mApps.getAppsWithoutSectionBreaks().indexOf(info); 343f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung rowIndex = findRowForAppIndex(appIndex); 344f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung rowTopOffset = getLayoutManager().getDecoratedTop(child); 345f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung rowHeight = child.getHeight(); 346f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung break; 347f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 348f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 349f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 350f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung 351f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung if (rowIndex != -1) { 352f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int height = getHeight() - getPaddingTop() - getPaddingBottom(); 353f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int totalScrollHeight = rowCount * rowHeight; 354f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung if (totalScrollHeight > height) { 355f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int scrollbarHeight = Math.max(mScrollbarMinHeight, 356f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung (int) (height / ((float) totalScrollHeight / height))); 357f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung 358f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung // Calculate the position and size of the scroll bar 359f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung if (isRtl) { 360f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung x = getPaddingLeft(); 361f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } else { 362f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung x = getWidth() - getPaddingRight() - mScrollbarWidth; 363f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 364f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung 365f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung // To calculate the offset, we compute the percentage of the total scrollable height 366f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung // that the user has already scrolled and then map that to the scroll bar bounds 367f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int availableY = totalScrollHeight - height; 368f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int availableScrollY = height - scrollbarHeight; 369f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung y = (rowIndex * rowHeight) - rowTopOffset; 370f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung y = getPaddingTop() + 371f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung (int) (((float) (getPaddingTop() + y) / availableY) * availableScrollY); 372f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung 373f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mVerticalScrollbarBounds.set(x, y, x + mScrollbarWidth, y + scrollbarHeight); 374f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung return; 375f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 376f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 377f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung mVerticalScrollbarBounds.setEmpty(); 378f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 379f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung 380f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung /** 381f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung * Returns the row index for a given position in the list. 382f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung */ 383f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung private int findRowForAppIndex(int position) { 384f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung List<AlphabeticalAppsList.SectionInfo> sections = mApps.getSections(); 385f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int appIndex = 0; 386f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int rowCount = 0; 387f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung for (AlphabeticalAppsList.SectionInfo info : sections) { 388f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int numRowsInSection = (int) Math.ceil((float) info.numAppsInSection / mNumAppsPerRow); 389f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung if (appIndex + info.numAppsInSection > position) { 390f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung return rowCount + ((position - appIndex) / mNumAppsPerRow); 391f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 392f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung appIndex += info.numAppsInSection; 393f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung rowCount += numRowsInSection; 394f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 395f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung return appIndex; 396f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 397f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung 398f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung /** 399f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung * Returns the total number of rows in the list. 400f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung */ 401f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung private int getNumRows() { 402f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung List<AlphabeticalAppsList.SectionInfo> sections = mApps.getSections(); 403f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int rowCount = 0; 404f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung for (AlphabeticalAppsList.SectionInfo info : sections) { 405f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung int numRowsInSection = (int) Math.ceil((float) info.numAppsInSection / mNumAppsPerRow); 406f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung rowCount += numRowsInSection; 407f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 408f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung return rowCount; 409f819dc2bc782e93ac9ecc163a99af0da62821d31Winson Chung } 41093f98eaf1800024cb2f28379bdd997f3debae63aWinson Chung} 411