1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.launcher3; 18 19import android.animation.AnimatorSet; 20import android.animation.FloatArrayEvaluator; 21import android.animation.ObjectAnimator; 22import android.animation.ValueAnimator; 23import android.animation.ValueAnimator.AnimatorUpdateListener; 24import android.annotation.TargetApi; 25import android.content.Context; 26import android.content.res.ColorStateList; 27import android.graphics.ColorMatrix; 28import android.graphics.ColorMatrixColorFilter; 29import android.graphics.PointF; 30import android.graphics.Rect; 31import android.graphics.drawable.Drawable; 32import android.os.Build; 33import android.util.AttributeSet; 34import android.view.View; 35import android.view.View.OnClickListener; 36import android.view.ViewGroup; 37import android.view.animation.DecelerateInterpolator; 38import android.view.animation.LinearInterpolator; 39import android.widget.TextView; 40 41import com.android.launcher3.util.Thunk; 42 43/** 44 * Implements a DropTarget. 45 */ 46public abstract class ButtonDropTarget extends TextView 47 implements DropTarget, DragController.DragListener, OnClickListener { 48 49 private static int DRAG_VIEW_DROP_DURATION = 285; 50 51 protected Launcher mLauncher; 52 private int mBottomDragPadding; 53 protected SearchDropTargetBar mSearchDropTargetBar; 54 55 /** Whether this drop target is active for the current drag */ 56 protected boolean mActive; 57 58 /** The paint applied to the drag view on hover */ 59 protected int mHoverColor = 0; 60 61 protected ColorStateList mOriginalTextColor; 62 protected Drawable mDrawable; 63 64 private AnimatorSet mCurrentColorAnim; 65 @Thunk ColorMatrix mSrcFilter, mDstFilter, mCurrentFilter; 66 67 68 public ButtonDropTarget(Context context, AttributeSet attrs) { 69 this(context, attrs, 0); 70 } 71 72 public ButtonDropTarget(Context context, AttributeSet attrs, int defStyle) { 73 super(context, attrs, defStyle); 74 mBottomDragPadding = getResources().getDimensionPixelSize(R.dimen.drop_target_drag_padding); 75 } 76 77 @Override 78 protected void onFinishInflate() { 79 super.onFinishInflate(); 80 mOriginalTextColor = getTextColors(); 81 82 // Remove the text in the Phone UI in landscape 83 DeviceProfile grid = ((Launcher) getContext()).getDeviceProfile(); 84 if (grid.isVerticalBarLayout()) { 85 setText(""); 86 } 87 } 88 89 @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1) 90 protected void setDrawable(int resId) { 91 // We do not set the drawable in the xml as that inflates two drawables corresponding to 92 // drawableLeft and drawableStart. 93 mDrawable = getResources().getDrawable(resId); 94 95 if (Utilities.ATLEAST_JB_MR1) { 96 setCompoundDrawablesRelativeWithIntrinsicBounds(mDrawable, null, null, null); 97 } else { 98 setCompoundDrawablesWithIntrinsicBounds(mDrawable, null, null, null); 99 } 100 } 101 102 public void setLauncher(Launcher launcher) { 103 mLauncher = launcher; 104 } 105 106 public void setSearchDropTargetBar(SearchDropTargetBar searchDropTargetBar) { 107 mSearchDropTargetBar = searchDropTargetBar; 108 } 109 110 @Override 111 public void onFlingToDelete(DragObject d, PointF vec) { } 112 113 @Override 114 public final void onDragEnter(DragObject d) { 115 d.dragView.setColor(mHoverColor); 116 if (Utilities.ATLEAST_LOLLIPOP) { 117 animateTextColor(mHoverColor); 118 } else { 119 if (mCurrentFilter == null) { 120 mCurrentFilter = new ColorMatrix(); 121 } 122 DragView.setColorScale(mHoverColor, mCurrentFilter); 123 mDrawable.setColorFilter(new ColorMatrixColorFilter(mCurrentFilter)); 124 setTextColor(mHoverColor); 125 } 126 } 127 128 @Override 129 public void onDragOver(DragObject d) { 130 // Do nothing 131 } 132 133 protected void resetHoverColor() { 134 if (Utilities.ATLEAST_LOLLIPOP) { 135 animateTextColor(mOriginalTextColor.getDefaultColor()); 136 } else { 137 mDrawable.setColorFilter(null); 138 setTextColor(mOriginalTextColor); 139 } 140 } 141 142 @TargetApi(Build.VERSION_CODES.LOLLIPOP) 143 private void animateTextColor(int targetColor) { 144 if (mCurrentColorAnim != null) { 145 mCurrentColorAnim.cancel(); 146 } 147 148 mCurrentColorAnim = new AnimatorSet(); 149 mCurrentColorAnim.setDuration(DragView.COLOR_CHANGE_DURATION); 150 151 if (mSrcFilter == null) { 152 mSrcFilter = new ColorMatrix(); 153 mDstFilter = new ColorMatrix(); 154 mCurrentFilter = new ColorMatrix(); 155 } 156 157 DragView.setColorScale(getTextColor(), mSrcFilter); 158 DragView.setColorScale(targetColor, mDstFilter); 159 ValueAnimator anim1 = ValueAnimator.ofObject( 160 new FloatArrayEvaluator(mCurrentFilter.getArray()), 161 mSrcFilter.getArray(), mDstFilter.getArray()); 162 anim1.addUpdateListener(new AnimatorUpdateListener() { 163 164 @Override 165 public void onAnimationUpdate(ValueAnimator animation) { 166 mDrawable.setColorFilter(new ColorMatrixColorFilter(mCurrentFilter)); 167 invalidate(); 168 } 169 }); 170 171 mCurrentColorAnim.play(anim1); 172 mCurrentColorAnim.play(ObjectAnimator.ofArgb(this, "textColor", targetColor)); 173 mCurrentColorAnim.start(); 174 } 175 176 @Override 177 public final void onDragExit(DragObject d) { 178 if (!d.dragComplete) { 179 d.dragView.setColor(0); 180 resetHoverColor(); 181 } else { 182 // Restore the hover color 183 d.dragView.setColor(mHoverColor); 184 } 185 } 186 187 @Override 188 public final void onDragStart(DragSource source, Object info, int dragAction) { 189 mActive = supportsDrop(source, info); 190 mDrawable.setColorFilter(null); 191 if (mCurrentColorAnim != null) { 192 mCurrentColorAnim.cancel(); 193 mCurrentColorAnim = null; 194 } 195 setTextColor(mOriginalTextColor); 196 ((ViewGroup) getParent()).setVisibility(mActive ? View.VISIBLE : View.GONE); 197 } 198 199 @Override 200 public final boolean acceptDrop(DragObject dragObject) { 201 return supportsDrop(dragObject.dragSource, dragObject.dragInfo); 202 } 203 204 protected abstract boolean supportsDrop(DragSource source, Object info); 205 206 @Override 207 public boolean isDropEnabled() { 208 return mActive; 209 } 210 211 @Override 212 public void onDragEnd() { 213 mActive = false; 214 } 215 216 /** 217 * On drop animate the dropView to the icon. 218 */ 219 @Override 220 public void onDrop(final DragObject d) { 221 final DragLayer dragLayer = mLauncher.getDragLayer(); 222 final Rect from = new Rect(); 223 dragLayer.getViewRectRelativeToSelf(d.dragView, from); 224 225 int width = mDrawable.getIntrinsicWidth(); 226 int height = mDrawable.getIntrinsicHeight(); 227 final Rect to = getIconRect(d.dragView.getMeasuredWidth(), d.dragView.getMeasuredHeight(), 228 width, height); 229 final float scale = (float) to.width() / from.width(); 230 mSearchDropTargetBar.deferOnDragEnd(); 231 232 Runnable onAnimationEndRunnable = new Runnable() { 233 @Override 234 public void run() { 235 completeDrop(d); 236 mSearchDropTargetBar.onDragEnd(); 237 mLauncher.exitSpringLoadedDragModeDelayed(true, 0, null); 238 } 239 }; 240 dragLayer.animateView(d.dragView, from, to, scale, 1f, 1f, 0.1f, 0.1f, 241 DRAG_VIEW_DROP_DURATION, new DecelerateInterpolator(2), 242 new LinearInterpolator(), onAnimationEndRunnable, 243 DragLayer.ANIMATION_END_DISAPPEAR, null); 244 } 245 246 @Override 247 public void prepareAccessibilityDrop() { } 248 249 @Thunk abstract void completeDrop(DragObject d); 250 251 @Override 252 public void getHitRectRelativeToDragLayer(android.graphics.Rect outRect) { 253 super.getHitRect(outRect); 254 outRect.bottom += mBottomDragPadding; 255 256 int[] coords = new int[2]; 257 mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(this, coords); 258 outRect.offsetTo(coords[0], coords[1]); 259 } 260 261 protected Rect getIconRect(int viewWidth, int viewHeight, int drawableWidth, int drawableHeight) { 262 DragLayer dragLayer = mLauncher.getDragLayer(); 263 264 // Find the rect to animate to (the view is center aligned) 265 Rect to = new Rect(); 266 dragLayer.getViewRectRelativeToSelf(this, to); 267 268 final int width = drawableWidth; 269 final int height = drawableHeight; 270 271 final int left; 272 final int right; 273 274 if (Utilities.isRtl(getResources())) { 275 right = to.right - getPaddingRight(); 276 left = right - width; 277 } else { 278 left = to.left + getPaddingLeft(); 279 right = left + width; 280 } 281 282 final int top = to.top + (getMeasuredHeight() - height) / 2; 283 final int bottom = top + height; 284 285 to.set(left, top, right, bottom); 286 287 // Center the destination rect about the trash icon 288 final int xOffset = (int) -(viewWidth - width) / 2; 289 final int yOffset = (int) -(viewHeight - height) / 2; 290 to.offset(xOffset, yOffset); 291 292 return to; 293 } 294 295 @Override 296 public void getLocationInDragLayer(int[] loc) { 297 mLauncher.getDragLayer().getLocationInDragLayer(this, loc); 298 } 299 300 public void enableAccessibleDrag(boolean enable) { 301 setOnClickListener(enable ? this : null); 302 } 303 304 protected String getAccessibilityDropConfirmation() { 305 return null; 306 } 307 308 @Override 309 public void onClick(View v) { 310 LauncherAppState.getInstance().getAccessibilityDelegate() 311 .handleAccessibleDrop(this, null, getAccessibilityDropConfirmation()); 312 } 313 314 public int getTextColor() { 315 return getTextColors().getDefaultColor(); 316 } 317} 318