Jon Miranda | a0233f7 | 2017-06-22 18:34:45 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 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.launcher3.folder; |
| 18 | |
| 19 | import android.animation.Animator; |
| 20 | import android.animation.AnimatorListenerAdapter; |
| 21 | import android.animation.ObjectAnimator; |
| 22 | import android.animation.ValueAnimator; |
| 23 | import android.graphics.Canvas; |
| 24 | import android.graphics.Color; |
| 25 | import android.graphics.Matrix; |
| 26 | import android.graphics.Paint; |
| 27 | import android.graphics.Path; |
| 28 | import android.graphics.PorterDuff; |
| 29 | import android.graphics.PorterDuffXfermode; |
| 30 | import android.graphics.RadialGradient; |
| 31 | import android.graphics.Region; |
| 32 | import android.graphics.Shader; |
| 33 | import android.support.v4.graphics.ColorUtils; |
| 34 | import android.util.Property; |
| 35 | import android.view.View; |
| 36 | |
| 37 | import com.android.launcher3.CellLayout; |
| 38 | import com.android.launcher3.DeviceProfile; |
| 39 | import com.android.launcher3.Launcher; |
| 40 | import com.android.launcher3.LauncherAnimUtils; |
| 41 | import com.android.launcher3.util.Themes; |
| 42 | |
| 43 | /** |
| 44 | * This object represents a FolderIcon preview background. It stores drawing / measurement |
| 45 | * information, handles drawing, and animation (accept state <--> rest state). |
| 46 | */ |
| 47 | public class PreviewBackground { |
| 48 | |
| 49 | private static final int CONSUMPTION_ANIMATION_DURATION = 100; |
| 50 | |
| 51 | private final PorterDuffXfermode mClipPorterDuffXfermode |
| 52 | = new PorterDuffXfermode(PorterDuff.Mode.DST_IN); |
| 53 | // Create a RadialGradient such that it draws a black circle and then extends with |
| 54 | // transparent. To achieve this, we keep the gradient to black for the range [0, 1) and |
| 55 | // just at the edge quickly change it to transparent. |
| 56 | private final RadialGradient mClipShader = new RadialGradient(0, 0, 1, |
| 57 | new int[] {Color.BLACK, Color.BLACK, Color.TRANSPARENT }, |
| 58 | new float[] {0, 0.999f, 1}, |
| 59 | Shader.TileMode.CLAMP); |
| 60 | |
| 61 | private final PorterDuffXfermode mShadowPorterDuffXfermode |
| 62 | = new PorterDuffXfermode(PorterDuff.Mode.DST_OUT); |
| 63 | private RadialGradient mShadowShader = null; |
| 64 | |
| 65 | private final Matrix mShaderMatrix = new Matrix(); |
| 66 | private final Path mPath = new Path(); |
| 67 | |
| 68 | private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); |
| 69 | |
| 70 | float mScale = 1f; |
| 71 | private float mColorMultiplier = 1f; |
| 72 | private int mBgColor; |
| 73 | private float mStrokeWidth; |
| 74 | private int mStrokeAlpha = MAX_BG_OPACITY; |
| 75 | private int mShadowAlpha = 255; |
| 76 | private View mInvalidateDelegate; |
| 77 | |
| 78 | int previewSize; |
| 79 | int basePreviewOffsetX; |
| 80 | int basePreviewOffsetY; |
| 81 | |
| 82 | private CellLayout mDrawingDelegate; |
| 83 | public int delegateCellX; |
| 84 | public int delegateCellY; |
| 85 | |
| 86 | // When the PreviewBackground is drawn under an icon (for creating a folder) the border |
| 87 | // should not occlude the icon |
| 88 | public boolean isClipping = true; |
| 89 | |
| 90 | // Drawing / animation configurations |
Jon Miranda | 72b5fd1 | 2017-06-25 18:06:23 -0700 | [diff] [blame] | 91 | private static final float ACCEPT_SCALE_FACTOR = 1.20f; |
Jon Miranda | a0233f7 | 2017-06-22 18:34:45 -0700 | [diff] [blame] | 92 | private static final float ACCEPT_COLOR_MULTIPLIER = 1.5f; |
| 93 | |
| 94 | // Expressed on a scale from 0 to 255. |
| 95 | private static final int BG_OPACITY = 160; |
| 96 | private static final int MAX_BG_OPACITY = 225; |
| 97 | private static final int SHADOW_OPACITY = 40; |
| 98 | |
| 99 | private ValueAnimator mScaleAnimator; |
| 100 | private ObjectAnimator mStrokeAlphaAnimator; |
| 101 | private ObjectAnimator mShadowAnimator; |
| 102 | |
| 103 | private static final Property<PreviewBackground, Integer> STROKE_ALPHA = |
| 104 | new Property<PreviewBackground, Integer>(Integer.class, "strokeAlpha") { |
| 105 | @Override |
| 106 | public Integer get(PreviewBackground previewBackground) { |
| 107 | return previewBackground.mStrokeAlpha; |
| 108 | } |
| 109 | |
| 110 | @Override |
| 111 | public void set(PreviewBackground previewBackground, Integer alpha) { |
| 112 | previewBackground.mStrokeAlpha = alpha; |
| 113 | previewBackground.invalidate(); |
| 114 | } |
| 115 | }; |
| 116 | |
| 117 | private static final Property<PreviewBackground, Integer> SHADOW_ALPHA = |
| 118 | new Property<PreviewBackground, Integer>(Integer.class, "shadowAlpha") { |
| 119 | @Override |
| 120 | public Integer get(PreviewBackground previewBackground) { |
| 121 | return previewBackground.mShadowAlpha; |
| 122 | } |
| 123 | |
| 124 | @Override |
| 125 | public void set(PreviewBackground previewBackground, Integer alpha) { |
| 126 | previewBackground.mShadowAlpha = alpha; |
| 127 | previewBackground.invalidate(); |
| 128 | } |
| 129 | }; |
| 130 | |
| 131 | public void setup(Launcher launcher, View invalidateDelegate, |
| 132 | int availableSpace, int topPadding) { |
| 133 | mInvalidateDelegate = invalidateDelegate; |
| 134 | mBgColor = Themes.getAttrColor(launcher, android.R.attr.colorPrimary); |
| 135 | |
| 136 | DeviceProfile grid = launcher.getDeviceProfile(); |
| 137 | final int previewSize = grid.folderIconSizePx; |
| 138 | final int previewPadding = grid.folderIconPreviewPadding; |
| 139 | |
| 140 | this.previewSize = (previewSize - 2 * previewPadding); |
| 141 | |
| 142 | basePreviewOffsetX = (availableSpace - this.previewSize) / 2; |
| 143 | basePreviewOffsetY = previewPadding + grid.folderBackgroundOffset + topPadding; |
| 144 | |
| 145 | // Stroke width is 1dp |
| 146 | mStrokeWidth = launcher.getResources().getDisplayMetrics().density; |
| 147 | |
| 148 | float radius = getScaledRadius(); |
| 149 | float shadowRadius = radius + mStrokeWidth; |
| 150 | int shadowColor = Color.argb(SHADOW_OPACITY, 0, 0, 0); |
| 151 | mShadowShader = new RadialGradient(0, 0, 1, |
| 152 | new int[] {shadowColor, Color.TRANSPARENT}, |
| 153 | new float[] {radius / shadowRadius, 1}, |
| 154 | Shader.TileMode.CLAMP); |
| 155 | |
| 156 | invalidate(); |
| 157 | } |
| 158 | |
| 159 | int getRadius() { |
| 160 | return previewSize / 2; |
| 161 | } |
| 162 | |
| 163 | int getScaledRadius() { |
| 164 | return (int) (mScale * getRadius()); |
| 165 | } |
| 166 | |
| 167 | int getOffsetX() { |
| 168 | return basePreviewOffsetX - (getScaledRadius() - getRadius()); |
| 169 | } |
| 170 | |
| 171 | int getOffsetY() { |
| 172 | return basePreviewOffsetY - (getScaledRadius() - getRadius()); |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * Returns the progress of the scale animation, where 0 means the scale is at 1f |
| 177 | * and 1 means the scale is at ACCEPT_SCALE_FACTOR. |
| 178 | */ |
| 179 | float getScaleProgress() { |
| 180 | return (mScale - 1f) / (ACCEPT_SCALE_FACTOR - 1f); |
| 181 | } |
| 182 | |
| 183 | void invalidate() { |
| 184 | if (mInvalidateDelegate != null) { |
| 185 | mInvalidateDelegate.invalidate(); |
| 186 | } |
| 187 | |
| 188 | if (mDrawingDelegate != null) { |
| 189 | mDrawingDelegate.invalidate(); |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | void setInvalidateDelegate(View invalidateDelegate) { |
| 194 | mInvalidateDelegate = invalidateDelegate; |
| 195 | invalidate(); |
| 196 | } |
| 197 | |
Sunny Goyal | e29897f | 2017-07-20 10:09:42 -0700 | [diff] [blame] | 198 | public int getBgColor() { |
| 199 | int alpha = (int) Math.min(MAX_BG_OPACITY, BG_OPACITY * mColorMultiplier); |
| 200 | return ColorUtils.setAlphaComponent(mBgColor, alpha); |
| 201 | } |
| 202 | |
Sunny Goyal | 179249d | 2017-12-19 16:49:24 -0800 | [diff] [blame^] | 203 | public int getBadgeColor() { |
| 204 | return mBgColor; |
| 205 | } |
| 206 | |
Jon Miranda | a0233f7 | 2017-06-22 18:34:45 -0700 | [diff] [blame] | 207 | public void drawBackground(Canvas canvas) { |
| 208 | mPaint.setStyle(Paint.Style.FILL); |
Sunny Goyal | e29897f | 2017-07-20 10:09:42 -0700 | [diff] [blame] | 209 | mPaint.setColor(getBgColor()); |
Jon Miranda | a0233f7 | 2017-06-22 18:34:45 -0700 | [diff] [blame] | 210 | |
| 211 | drawCircle(canvas, 0 /* deltaRadius */); |
| 212 | |
Sunny Goyal | e29897f | 2017-07-20 10:09:42 -0700 | [diff] [blame] | 213 | drawShadow(canvas); |
| 214 | } |
| 215 | |
| 216 | public void drawShadow(Canvas canvas) { |
Jon Miranda | a0233f7 | 2017-06-22 18:34:45 -0700 | [diff] [blame] | 217 | if (mShadowShader == null) { |
| 218 | return; |
| 219 | } |
Sunny Goyal | e29897f | 2017-07-20 10:09:42 -0700 | [diff] [blame] | 220 | |
Jon Miranda | a0233f7 | 2017-06-22 18:34:45 -0700 | [diff] [blame] | 221 | float radius = getScaledRadius(); |
| 222 | float shadowRadius = radius + mStrokeWidth; |
Sunny Goyal | e29897f | 2017-07-20 10:09:42 -0700 | [diff] [blame] | 223 | mPaint.setStyle(Paint.Style.FILL); |
Jon Miranda | a0233f7 | 2017-06-22 18:34:45 -0700 | [diff] [blame] | 224 | mPaint.setColor(Color.BLACK); |
| 225 | int offsetX = getOffsetX(); |
| 226 | int offsetY = getOffsetY(); |
| 227 | final int saveCount; |
| 228 | if (canvas.isHardwareAccelerated()) { |
| 229 | saveCount = canvas.saveLayer(offsetX - mStrokeWidth, offsetY, |
| 230 | offsetX + radius + shadowRadius, offsetY + shadowRadius + shadowRadius, |
| 231 | null, Canvas.CLIP_TO_LAYER_SAVE_FLAG | Canvas.HAS_ALPHA_LAYER_SAVE_FLAG); |
| 232 | |
| 233 | } else { |
| 234 | saveCount = canvas.save(Canvas.CLIP_SAVE_FLAG); |
Sunny Goyal | e29897f | 2017-07-20 10:09:42 -0700 | [diff] [blame] | 235 | canvas.clipPath(getClipPath(), Region.Op.DIFFERENCE); |
Jon Miranda | a0233f7 | 2017-06-22 18:34:45 -0700 | [diff] [blame] | 236 | } |
| 237 | |
| 238 | mShaderMatrix.setScale(shadowRadius, shadowRadius); |
| 239 | mShaderMatrix.postTranslate(radius + offsetX, shadowRadius + offsetY); |
| 240 | mShadowShader.setLocalMatrix(mShaderMatrix); |
| 241 | mPaint.setAlpha(mShadowAlpha); |
| 242 | mPaint.setShader(mShadowShader); |
| 243 | canvas.drawPaint(mPaint); |
| 244 | mPaint.setAlpha(255); |
| 245 | mPaint.setShader(null); |
| 246 | if (canvas.isHardwareAccelerated()) { |
| 247 | mPaint.setXfermode(mShadowPorterDuffXfermode); |
| 248 | canvas.drawCircle(radius + offsetX, radius + offsetY, radius, mPaint); |
| 249 | mPaint.setXfermode(null); |
| 250 | } |
| 251 | |
| 252 | canvas.restoreToCount(saveCount); |
| 253 | } |
| 254 | |
| 255 | public void fadeInBackgroundShadow() { |
| 256 | if (mShadowAnimator != null) { |
| 257 | mShadowAnimator.cancel(); |
| 258 | } |
| 259 | mShadowAnimator = ObjectAnimator |
| 260 | .ofInt(this, SHADOW_ALPHA, 0, 255) |
| 261 | .setDuration(100); |
| 262 | mShadowAnimator.addListener(new AnimatorListenerAdapter() { |
| 263 | @Override |
| 264 | public void onAnimationEnd(Animator animation) { |
| 265 | mShadowAnimator = null; |
| 266 | } |
| 267 | }); |
| 268 | mShadowAnimator.start(); |
| 269 | } |
| 270 | |
| 271 | public void animateBackgroundStroke() { |
| 272 | if (mStrokeAlphaAnimator != null) { |
| 273 | mStrokeAlphaAnimator.cancel(); |
| 274 | } |
| 275 | mStrokeAlphaAnimator = ObjectAnimator |
| 276 | .ofInt(this, STROKE_ALPHA, MAX_BG_OPACITY / 2, MAX_BG_OPACITY) |
| 277 | .setDuration(100); |
| 278 | mStrokeAlphaAnimator.addListener(new AnimatorListenerAdapter() { |
| 279 | @Override |
| 280 | public void onAnimationEnd(Animator animation) { |
| 281 | mStrokeAlphaAnimator = null; |
| 282 | } |
| 283 | }); |
| 284 | mStrokeAlphaAnimator.start(); |
| 285 | } |
| 286 | |
| 287 | public void drawBackgroundStroke(Canvas canvas) { |
| 288 | mPaint.setColor(ColorUtils.setAlphaComponent(mBgColor, mStrokeAlpha)); |
| 289 | mPaint.setStyle(Paint.Style.STROKE); |
| 290 | mPaint.setStrokeWidth(mStrokeWidth); |
| 291 | drawCircle(canvas, 1 /* deltaRadius */); |
| 292 | } |
| 293 | |
| 294 | public void drawLeaveBehind(Canvas canvas) { |
| 295 | float originalScale = mScale; |
| 296 | mScale = 0.5f; |
| 297 | |
| 298 | mPaint.setStyle(Paint.Style.FILL); |
| 299 | mPaint.setColor(Color.argb(160, 245, 245, 245)); |
| 300 | drawCircle(canvas, 0 /* deltaRadius */); |
| 301 | |
| 302 | mScale = originalScale; |
| 303 | } |
| 304 | |
| 305 | private void drawCircle(Canvas canvas,float deltaRadius) { |
| 306 | float radius = getScaledRadius(); |
| 307 | canvas.drawCircle(radius + getOffsetX(), radius + getOffsetY(), |
| 308 | radius - deltaRadius, mPaint); |
| 309 | } |
| 310 | |
Sunny Goyal | e29897f | 2017-07-20 10:09:42 -0700 | [diff] [blame] | 311 | public Path getClipPath() { |
Jon Miranda | a0233f7 | 2017-06-22 18:34:45 -0700 | [diff] [blame] | 312 | mPath.reset(); |
| 313 | float r = getScaledRadius(); |
| 314 | mPath.addCircle(r + getOffsetX(), r + getOffsetY(), r, Path.Direction.CW); |
Sunny Goyal | e29897f | 2017-07-20 10:09:42 -0700 | [diff] [blame] | 315 | return mPath; |
Jon Miranda | a0233f7 | 2017-06-22 18:34:45 -0700 | [diff] [blame] | 316 | } |
| 317 | |
| 318 | // It is the callers responsibility to save and restore the canvas layers. |
| 319 | void clipCanvasHardware(Canvas canvas) { |
| 320 | mPaint.setColor(Color.BLACK); |
Sunny Goyal | 5247f5b | 2017-07-04 12:07:46 -0700 | [diff] [blame] | 321 | mPaint.setStyle(Paint.Style.FILL); |
Jon Miranda | a0233f7 | 2017-06-22 18:34:45 -0700 | [diff] [blame] | 322 | mPaint.setXfermode(mClipPorterDuffXfermode); |
| 323 | |
| 324 | float radius = getScaledRadius(); |
| 325 | mShaderMatrix.setScale(radius, radius); |
| 326 | mShaderMatrix.postTranslate(radius + getOffsetX(), radius + getOffsetY()); |
| 327 | mClipShader.setLocalMatrix(mShaderMatrix); |
| 328 | mPaint.setShader(mClipShader); |
| 329 | canvas.drawPaint(mPaint); |
| 330 | mPaint.setXfermode(null); |
| 331 | mPaint.setShader(null); |
| 332 | } |
| 333 | |
| 334 | private void delegateDrawing(CellLayout delegate, int cellX, int cellY) { |
| 335 | if (mDrawingDelegate != delegate) { |
| 336 | delegate.addFolderBackground(this); |
| 337 | } |
| 338 | |
| 339 | mDrawingDelegate = delegate; |
| 340 | delegateCellX = cellX; |
| 341 | delegateCellY = cellY; |
| 342 | |
| 343 | invalidate(); |
| 344 | } |
| 345 | |
| 346 | private void clearDrawingDelegate() { |
| 347 | if (mDrawingDelegate != null) { |
| 348 | mDrawingDelegate.removeFolderBackground(this); |
| 349 | } |
| 350 | |
| 351 | mDrawingDelegate = null; |
Sunny Goyal | 5247f5b | 2017-07-04 12:07:46 -0700 | [diff] [blame] | 352 | isClipping = true; |
Jon Miranda | a0233f7 | 2017-06-22 18:34:45 -0700 | [diff] [blame] | 353 | invalidate(); |
| 354 | } |
| 355 | |
| 356 | boolean drawingDelegated() { |
| 357 | return mDrawingDelegate != null; |
| 358 | } |
| 359 | |
| 360 | private void animateScale(float finalScale, float finalMultiplier, |
| 361 | final Runnable onStart, final Runnable onEnd) { |
| 362 | final float scale0 = mScale; |
| 363 | final float scale1 = finalScale; |
| 364 | |
| 365 | final float bgMultiplier0 = mColorMultiplier; |
| 366 | final float bgMultiplier1 = finalMultiplier; |
| 367 | |
| 368 | if (mScaleAnimator != null) { |
| 369 | mScaleAnimator.cancel(); |
| 370 | } |
| 371 | |
| 372 | mScaleAnimator = LauncherAnimUtils.ofFloat(0f, 1.0f); |
| 373 | |
| 374 | mScaleAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { |
| 375 | @Override |
| 376 | public void onAnimationUpdate(ValueAnimator animation) { |
| 377 | float prog = animation.getAnimatedFraction(); |
| 378 | mScale = prog * scale1 + (1 - prog) * scale0; |
| 379 | mColorMultiplier = prog * bgMultiplier1 + (1 - prog) * bgMultiplier0; |
| 380 | invalidate(); |
| 381 | } |
| 382 | }); |
| 383 | mScaleAnimator.addListener(new AnimatorListenerAdapter() { |
| 384 | @Override |
| 385 | public void onAnimationStart(Animator animation) { |
| 386 | if (onStart != null) { |
| 387 | onStart.run(); |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | @Override |
| 392 | public void onAnimationEnd(Animator animation) { |
| 393 | if (onEnd != null) { |
| 394 | onEnd.run(); |
| 395 | } |
| 396 | mScaleAnimator = null; |
| 397 | } |
| 398 | }); |
| 399 | |
| 400 | mScaleAnimator.setDuration(CONSUMPTION_ANIMATION_DURATION); |
| 401 | mScaleAnimator.start(); |
| 402 | } |
| 403 | |
| 404 | public void animateToAccept(final CellLayout cl, final int cellX, final int cellY) { |
| 405 | Runnable onStart = new Runnable() { |
| 406 | @Override |
| 407 | public void run() { |
| 408 | delegateDrawing(cl, cellX, cellY); |
| 409 | } |
| 410 | }; |
| 411 | animateScale(ACCEPT_SCALE_FACTOR, ACCEPT_COLOR_MULTIPLIER, onStart, null); |
| 412 | } |
| 413 | |
| 414 | public void animateToRest() { |
| 415 | // This can be called multiple times -- we need to make sure the drawing delegate |
| 416 | // is saved and restored at the beginning of the animation, since cancelling the |
| 417 | // existing animation can clear the delgate. |
| 418 | final CellLayout cl = mDrawingDelegate; |
| 419 | final int cellX = delegateCellX; |
| 420 | final int cellY = delegateCellY; |
| 421 | |
| 422 | Runnable onStart = new Runnable() { |
| 423 | @Override |
| 424 | public void run() { |
| 425 | delegateDrawing(cl, cellX, cellY); |
| 426 | } |
| 427 | }; |
| 428 | Runnable onEnd = new Runnable() { |
| 429 | @Override |
| 430 | public void run() { |
| 431 | clearDrawingDelegate(); |
| 432 | } |
| 433 | }; |
| 434 | animateScale(1f, 1f, onStart, onEnd); |
| 435 | } |
| 436 | |
| 437 | public int getBackgroundAlpha() { |
| 438 | return (int) Math.min(MAX_BG_OPACITY, BG_OPACITY * mColorMultiplier); |
| 439 | } |
| 440 | |
| 441 | public float getStrokeWidth() { |
| 442 | return mStrokeWidth; |
| 443 | } |
| 444 | } |