1 /* 2 * Copyright (C) 2011 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 17 package com.android.launcher2; 18 19 import android.animation.TimeInterpolator; 20 import android.animation.ValueAnimator; 21 import android.animation.ValueAnimator.AnimatorUpdateListener; 22 import android.content.Context; 23 import android.content.res.ColorStateList; 24 import android.content.res.Configuration; 25 import android.content.res.Resources; 26 import android.graphics.PointF; 27 import android.graphics.Rect; 28 import android.graphics.drawable.Drawable; 29 import android.graphics.drawable.TransitionDrawable; 30 import android.util.AttributeSet; 31 import android.view.View; 32 import android.view.ViewConfiguration; 33 import android.view.ViewGroup; 34 import android.view.animation.AnimationUtils; 35 import android.view.animation.DecelerateInterpolator; 36 import android.view.animation.LinearInterpolator; 37 38 import com.android.launcher.R; 39 40 public class DeleteDropTarget extends ButtonDropTarget { 41 private static int DELETE_ANIMATION_DURATION = 285; 42 private static int FLING_DELETE_ANIMATION_DURATION = 350; 43 private static float FLING_TO_DELETE_FRICTION = 0.035f; 44 private static int MODE_FLING_DELETE_TO_TRASH = 0; 45 private static int MODE_FLING_DELETE_ALONG_VECTOR = 1; 46 47 private final int mFlingDeleteMode = MODE_FLING_DELETE_ALONG_VECTOR; 48 49 private ColorStateList mOriginalTextColor; 50 private TransitionDrawable mUninstallDrawable; 51 private TransitionDrawable mRemoveDrawable; 52 private TransitionDrawable mCurrentDrawable; 53 54 public DeleteDropTarget(Context context, AttributeSet attrs) { 55 this(context, attrs, 0); 56 } 57 58 public DeleteDropTarget(Context context, AttributeSet attrs, int defStyle) { 59 super(context, attrs, defStyle); 60 } 61 62 @Override 63 protected void onFinishInflate() { 64 super.onFinishInflate(); 65 66 // Get the drawable 67 mOriginalTextColor = getTextColors(); 68 69 // Get the hover color 70 Resources r = getResources(); 71 mHoverColor = r.getColor(R.color.delete_target_hover_tint); 72 mUninstallDrawable = (TransitionDrawable) 73 r.getDrawable(R.drawable.uninstall_target_selector); 74 mRemoveDrawable = (TransitionDrawable) r.getDrawable(R.drawable.remove_target_selector); 75 76 mRemoveDrawable.setCrossFadeEnabled(true); 77 mUninstallDrawable.setCrossFadeEnabled(true); 78 79 // The current drawable is set to either the remove drawable or the uninstall drawable 80 // and is initially set to the remove drawable, as set in the layout xml. 81 mCurrentDrawable = (TransitionDrawable) getCurrentDrawable(); 82 83 // Remove the text in the Phone UI in landscape 84 int orientation = getResources().getConfiguration().orientation; 85 if (orientation == Configuration.ORIENTATION_LANDSCAPE) { 86 if (!LauncherApplication.isScreenLarge()) { 87 setText(""); 88 } 89 } 90 } 91 92 private boolean isAllAppsApplication(DragSource source, Object info) { 93 return (source instanceof AppsCustomizePagedView) && (info instanceof ApplicationInfo); 94 } 95 private boolean isAllAppsWidget(DragSource source, Object info) { 96 if (source instanceof AppsCustomizePagedView) { 97 if (info instanceof PendingAddItemInfo) { 98 PendingAddItemInfo addInfo = (PendingAddItemInfo) info; 99 switch (addInfo.itemType) { 100 case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT: 101 case LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET: 102 return true; 103 } 104 } 105 } 106 return false; 107 } 108 private boolean isDragSourceWorkspaceOrFolder(DragObject d) { 109 return (d.dragSource instanceof Workspace) || (d.dragSource instanceof Folder); 110 } 111 private boolean isWorkspaceOrFolderApplication(DragObject d) { 112 return isDragSourceWorkspaceOrFolder(d) && (d.dragInfo instanceof ShortcutInfo); 113 } 114 private boolean isWorkspaceOrFolderWidget(DragObject d) { 115 return isDragSourceWorkspaceOrFolder(d) && (d.dragInfo instanceof LauncherAppWidgetInfo); 116 } 117 private boolean isWorkspaceFolder(DragObject d) { 118 return (d.dragSource instanceof Workspace) && (d.dragInfo instanceof FolderInfo); 119 } 120 121 private void setHoverColor() { 122 mCurrentDrawable.startTransition(mTransitionDuration); 123 setTextColor(mHoverColor); 124 } 125 private void resetHoverColor() { 126 mCurrentDrawable.resetTransition(); 127 setTextColor(mOriginalTextColor); 128 } 129 130 @Override 131 public boolean acceptDrop(DragObject d) { 132 // We can remove everything including App shortcuts, folders, widgets, etc. 133 return true; 134 } 135 136 @Override 137 public void onDragStart(DragSource source, Object info, int dragAction) { 138 boolean isVisible = true; 139 boolean isUninstall = false; 140 141 // If we are dragging a widget from AppsCustomize, hide the delete target 142 if (isAllAppsWidget(source, info)) { 143 isVisible = false; 144 } 145 146 // If we are dragging an application from AppsCustomize, only show the control if we can 147 // delete the app (it was downloaded), and rename the string to "uninstall" in such a case 148 if (isAllAppsApplication(source, info)) { 149 ApplicationInfo appInfo = (ApplicationInfo) info; 150 if ((appInfo.flags & ApplicationInfo.DOWNLOADED_FLAG) != 0) { 151 isUninstall = true; 152 } else { 153 isVisible = false; 154 } 155 } 156 157 if (isUninstall) { 158 setCompoundDrawablesWithIntrinsicBounds(mUninstallDrawable, null, null, null); 159 } else { 160 setCompoundDrawablesWithIntrinsicBounds(mRemoveDrawable, null, null, null); 161 } 162 mCurrentDrawable = (TransitionDrawable) getCurrentDrawable(); 163 164 mActive = isVisible; 165 resetHoverColor(); 166 ((ViewGroup) getParent()).setVisibility(isVisible ? View.VISIBLE : View.GONE); 167 if (getText().length() > 0) { 168 setText(isUninstall ? R.string.delete_target_uninstall_label 169 : R.string.delete_target_label); 170 } 171 } 172 173 @Override 174 public void onDragEnd() { 175 super.onDragEnd(); 176 mActive = false; 177 } 178 179 public void onDragEnter(DragObject d) { 180 super.onDragEnter(d); 181 182 setHoverColor(); 183 } 184 185 public void onDragExit(DragObject d) { 186 super.onDragExit(d); 187 188 if (!d.dragComplete) { 189 resetHoverColor(); 190 } else { 191 // Restore the hover color if we are deleting 192 d.dragView.setColor(mHoverColor); 193 } 194 } 195 196 private void animateToTrashAndCompleteDrop(final DragObject d) { 197 DragLayer dragLayer = mLauncher.getDragLayer(); 198 Rect from = new Rect(); 199 dragLayer.getViewRectRelativeToSelf(d.dragView, from); 200 Rect to = getIconRect(d.dragView.getMeasuredWidth(), d.dragView.getMeasuredHeight(), 201 mCurrentDrawable.getIntrinsicWidth(), mCurrentDrawable.getIntrinsicHeight()); 202 float scale = (float) to.width() / from.width(); 203 204 mSearchDropTargetBar.deferOnDragEnd(); 205 Runnable onAnimationEndRunnable = new Runnable() { 206 @Override 207 public void run() { 208 mSearchDropTargetBar.onDragEnd(); 209 mLauncher.exitSpringLoadedDragMode(); 210 completeDrop(d); 211 } 212 }; 213 dragLayer.animateView(d.dragView, from, to, scale, 1f, 1f, 0.1f, 0.1f, 214 DELETE_ANIMATION_DURATION, new DecelerateInterpolator(2), 215 new LinearInterpolator(), onAnimationEndRunnable, 216 DragLayer.ANIMATION_END_DISAPPEAR, null); 217 } 218 219 private void completeDrop(DragObject d) { 220 ItemInfo item = (ItemInfo) d.dragInfo; 221 222 if (isAllAppsApplication(d.dragSource, item)) { 223 // Uninstall the application if it is being dragged from AppsCustomize 224 mLauncher.startApplicationUninstallActivity((ApplicationInfo) item); 225 } else if (isWorkspaceOrFolderApplication(d)) { 226 LauncherModel.deleteItemFromDatabase(mLauncher, item); 227 } else if (isWorkspaceFolder(d)) { 228 // Remove the folder from the workspace and delete the contents from launcher model 229 FolderInfo folderInfo = (FolderInfo) item; 230 mLauncher.removeFolder(folderInfo); 231 LauncherModel.deleteFolderContentsFromDatabase(mLauncher, folderInfo); 232 } else if (isWorkspaceOrFolderWidget(d)) { 233 // Remove the widget from the workspace 234 mLauncher.removeAppWidget((LauncherAppWidgetInfo) item); 235 LauncherModel.deleteItemFromDatabase(mLauncher, item); 236 237 final LauncherAppWidgetInfo launcherAppWidgetInfo = (LauncherAppWidgetInfo) item; 238 final LauncherAppWidgetHost appWidgetHost = mLauncher.getAppWidgetHost(); 239 if (appWidgetHost != null) { 240 // Deleting an app widget ID is a void call but writes to disk before returning 241 // to the caller... 242 new Thread("deleteAppWidgetId") { 243 public void run() { 244 appWidgetHost.deleteAppWidgetId(launcherAppWidgetInfo.appWidgetId); 245 } 246 }.start(); 247 } 248 } 249 } 250 251 public void onDrop(DragObject d) { 252 animateToTrashAndCompleteDrop(d); 253 } 254 255 /** 256 * Creates an animation from the current drag view to the delete trash icon. 257 */ 258 private AnimatorUpdateListener createFlingToTrashAnimatorListener(final DragLayer dragLayer, 259 DragObject d, PointF vel, ViewConfiguration config) { 260 final Rect to = getIconRect(d.dragView.getMeasuredWidth(), d.dragView.getMeasuredHeight(), 261 mCurrentDrawable.getIntrinsicWidth(), mCurrentDrawable.getIntrinsicHeight()); 262 final Rect from = new Rect(); 263 dragLayer.getViewRectRelativeToSelf(d.dragView, from); 264 265 // Calculate how far along the velocity vector we should put the intermediate point on 266 // the bezier curve 267 float velocity = Math.abs(vel.length()); 268 float vp = Math.min(1f, velocity / (config.getScaledMaximumFlingVelocity() / 2f)); 269 int offsetY = (int) (-from.top * vp); 270 int offsetX = (int) (offsetY / (vel.y / vel.x)); 271 final float y2 = from.top + offsetY; // intermediate t/l 272 final float x2 = from.left + offsetX; 273 final float x1 = from.left; // drag view t/l 274 final float y1 = from.top; 275 final float x3 = to.left; // delete target t/l 276 final float y3 = to.top; 277 278 final TimeInterpolator scaleAlphaInterpolator = new TimeInterpolator() { 279 @Override 280 public float getInterpolation(float t) { 281 return t * t * t * t * t * t * t * t; 282 } 283 }; 284 return new AnimatorUpdateListener() { 285 @Override 286 public void onAnimationUpdate(ValueAnimator animation) { 287 final DragView dragView = (DragView) dragLayer.getAnimatedView(); 288 float t = ((Float) animation.getAnimatedValue()).floatValue(); 289 float tp = scaleAlphaInterpolator.getInterpolation(t); 290 float initialScale = dragView.getInitialScale(); 291 float finalAlpha = 0.5f; 292 float scale = dragView.getScaleX(); 293 float x1o = ((1f - scale) * dragView.getMeasuredWidth()) / 2f; 294 float y1o = ((1f - scale) * dragView.getMeasuredHeight()) / 2f; 295 float x = (1f - t) * (1f - t) * (x1 - x1o) + 2 * (1f - t) * t * (x2 - x1o) + 296 (t * t) * x3; 297 float y = (1f - t) * (1f - t) * (y1 - y1o) + 2 * (1f - t) * t * (y2 - x1o) + 298 (t * t) * y3; 299 300 dragView.setTranslationX(x); 301 dragView.setTranslationY(y); 302 dragView.setScaleX(initialScale * (1f - tp)); 303 dragView.setScaleY(initialScale * (1f - tp)); 304 dragView.setAlpha(finalAlpha + (1f - finalAlpha) * (1f - tp)); 305 } 306 }; 307 } 308 309 /** 310 * Creates an animation from the current drag view along its current velocity vector. 311 * For this animation, the alpha runs for a fixed duration and we update the position 312 * progressively. 313 */ 314 private static class FlingAlongVectorAnimatorUpdateListener implements AnimatorUpdateListener { 315 private DragLayer mDragLayer; 316 private PointF mVelocity; 317 private Rect mFrom; 318 private long mPrevTime; 319 private boolean mHasOffsetForScale; 320 private float mFriction; 321 322 private final TimeInterpolator mAlphaInterpolator = new DecelerateInterpolator(0.75f); 323 324 public FlingAlongVectorAnimatorUpdateListener(DragLayer dragLayer, PointF vel, Rect from, 325 long startTime, float friction) { 326 mDragLayer = dragLayer; 327 mVelocity = vel; 328 mFrom = from; 329 mPrevTime = startTime; 330 mFriction = 1f - (dragLayer.getResources().getDisplayMetrics().density * friction); 331 } 332 333 @Override 334 public void onAnimationUpdate(ValueAnimator animation) { 335 final DragView dragView = (DragView) mDragLayer.getAnimatedView(); 336 float t = ((Float) animation.getAnimatedValue()).floatValue(); 337 long curTime = AnimationUtils.currentAnimationTimeMillis(); 338 339 if (!mHasOffsetForScale) { 340 mHasOffsetForScale = true; 341 float scale = dragView.getScaleX(); 342 float xOffset = ((scale - 1f) * dragView.getMeasuredWidth()) / 2f; 343 float yOffset = ((scale - 1f) * dragView.getMeasuredHeight()) / 2f; 344 345 mFrom.left += xOffset; 346 mFrom.top += yOffset; 347 } 348 349 mFrom.left += (mVelocity.x * (curTime - mPrevTime) / 1000f); 350 mFrom.top += (mVelocity.y * (curTime - mPrevTime) / 1000f); 351 352 dragView.setTranslationX(mFrom.left); 353 dragView.setTranslationY(mFrom.top); 354 dragView.setAlpha(1f - mAlphaInterpolator.getInterpolation(t)); 355 356 mVelocity.x *= mFriction; 357 mVelocity.y *= mFriction; 358 mPrevTime = curTime; 359 } 360 }; 361 private AnimatorUpdateListener createFlingAlongVectorAnimatorListener(final DragLayer dragLayer, 362 DragObject d, PointF vel, final long startTime, final int duration, 363 ViewConfiguration config) { 364 final Rect from = new Rect(); 365 dragLayer.getViewRectRelativeToSelf(d.dragView, from); 366 367 return new FlingAlongVectorAnimatorUpdateListener(dragLayer, vel, from, startTime, 368 FLING_TO_DELETE_FRICTION); 369 } 370 371 public void onFlingToDelete(final DragObject d, int x, int y, PointF vel) { 372 final boolean isAllApps = d.dragSource instanceof AppsCustomizePagedView; 373 374 // Don't highlight the icon as it's animating 375 d.dragView.setColor(0); 376 d.dragView.updateInitialScaleToCurrentScale(); 377 // Don't highlight the target if we are flinging from AllApps 378 if (isAllApps) { 379 resetHoverColor(); 380 } 381 382 if (mFlingDeleteMode == MODE_FLING_DELETE_TO_TRASH) { 383 // Defer animating out the drop target if we are animating to it 384 mSearchDropTargetBar.deferOnDragEnd(); 385 mSearchDropTargetBar.finishAnimations(); 386 } 387 388 final ViewConfiguration config = ViewConfiguration.get(mLauncher); 389 final DragLayer dragLayer = mLauncher.getDragLayer(); 390 final int duration = FLING_DELETE_ANIMATION_DURATION; 391 final long startTime = AnimationUtils.currentAnimationTimeMillis(); 392 393 // NOTE: Because it takes time for the first frame of animation to actually be 394 // called and we expect the animation to be a continuation of the fling, we have 395 // to account for the time that has elapsed since the fling finished. And since 396 // we don't have a startDelay, we will always get call to update when we call 397 // start() (which we want to ignore). 398 final TimeInterpolator tInterpolator = new TimeInterpolator() { 399 private int mCount = -1; 400 private float mOffset = 0f; 401 402 @Override 403 public float getInterpolation(float t) { 404 if (mCount < 0) { 405 mCount++; 406 } else if (mCount == 0) { 407 mOffset = Math.min(0.5f, (float) (AnimationUtils.currentAnimationTimeMillis() - 408 startTime) / duration); 409 mCount++; 410 } 411 return Math.min(1f, mOffset + t); 412 } 413 }; 414 AnimatorUpdateListener updateCb = null; 415 if (mFlingDeleteMode == MODE_FLING_DELETE_TO_TRASH) { 416 updateCb = createFlingToTrashAnimatorListener(dragLayer, d, vel, config); 417 } else if (mFlingDeleteMode == MODE_FLING_DELETE_ALONG_VECTOR) { 418 updateCb = createFlingAlongVectorAnimatorListener(dragLayer, d, vel, startTime, 419 duration, config); 420 } 421 Runnable onAnimationEndRunnable = new Runnable() { 422 @Override 423 public void run() { 424 mSearchDropTargetBar.onDragEnd(); 425 426 // If we are dragging from AllApps, then we allow AppsCustomizePagedView to clean up 427 // itself, otherwise, complete the drop to initiate the deletion process 428 if (!isAllApps) { 429 mLauncher.exitSpringLoadedDragMode(); 430 completeDrop(d); 431 } 432 mLauncher.getDragController().onDeferredEndFling(d); 433 } 434 }; 435 dragLayer.animateView(d.dragView, updateCb, duration, tInterpolator, onAnimationEndRunnable, 436 DragLayer.ANIMATION_END_DISAPPEAR, null); 437 } 438 } 439
