148198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler/* 248198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler * Copyright (C) 2017 The Android Open Source Project 348198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler * 448198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler * Licensed under the Apache License, Version 2.0 (the "License"); 548198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler * you may not use this file except in compliance with the License. 648198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler * You may obtain a copy of the License at 748198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler * 848198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler * http://www.apache.org/licenses/LICENSE-2.0 948198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler * 1048198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler * Unless required by applicable law or agreed to in writing, software 1148198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler * distributed under the License is distributed on an "AS IS" BASIS, 1248198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1348198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler * See the License for the specific language governing permissions and 1448198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler * limitations under the License. 1548198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler */ 1648198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler 1748198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschlerpackage com.android.launcher3.graphics; 1848198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler 1948198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschlerimport android.content.Context; 2048198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschlerimport android.graphics.Bitmap; 2148198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschlerimport android.graphics.Canvas; 2248198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschlerimport android.graphics.Color; 23a0465afe8de773acd371c8ebb91e92735191631dMario Bertschlerimport android.graphics.LinearGradient; 2448198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschlerimport android.graphics.Paint; 2548198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschlerimport android.graphics.RadialGradient; 2648198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschlerimport android.graphics.RectF; 2748198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschlerimport android.graphics.Shader; 28a0465afe8de773acd371c8ebb91e92735191631dMario Bertschlerimport android.support.v4.graphics.ColorUtils; 2948198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschlerimport android.util.AttributeSet; 306d1e9a1012262b64646c6f765d3d9179c1700cacSunny Goyalimport android.util.DisplayMetrics; 3148198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschlerimport android.view.View; 328acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschlerimport android.view.animation.AccelerateInterpolator; 338acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschlerimport android.view.animation.Interpolator; 3448198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler 351a83af2b81a0dd6c3232dfbc55fa4a1076205b85Mario Bertschlerimport com.android.launcher3.Launcher; 3648198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschlerimport com.android.launcher3.R; 3748198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschlerimport com.android.launcher3.Utilities; 3827288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschlerimport com.android.launcher3.dynamicui.WallpaperColorInfo; 39a0465afe8de773acd371c8ebb91e92735191631dMario Bertschlerimport com.android.launcher3.util.Themes; 4048198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler 4148198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler/** 4248198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler * Draws a translucent radial gradient background from an initial state with progress 0.0 to a 4348198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler * final state with progress 1.0; 4448198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler */ 4527288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschlerpublic class GradientView extends View implements WallpaperColorInfo.OnChangeListener { 4648198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler 478acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler private static final int DEFAULT_COLOR = Color.WHITE; 48a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler private static final int ALPHA_MASK_HEIGHT_DP = 500; 49a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler private static final int ALPHA_MASK_WIDTH_DP = 2; 508acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler private static final boolean DEBUG = false; 5148198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler 5227288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler private final Bitmap mAlphaGradientMask; 5348198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler 54a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler private boolean mShowScrim = true; 558acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler private int mColor1 = DEFAULT_COLOR; 568acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler private int mColor2 = DEFAULT_COLOR; 578acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler private int mWidth; 588acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler private int mHeight; 5948198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler private final RectF mAlphaMaskRect = new RectF(); 6048198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler private final RectF mFinalMaskRect = new RectF(); 61a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler private final Paint mPaintWithScrim = new Paint(); 62a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler private final Paint mPaintNoScrim = new Paint(); 6348198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler private float mProgress; 64a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler private final int mMaskHeight, mMaskWidth; 656d1e9a1012262b64646c6f765d3d9179c1700cacSunny Goyal private final int mAlphaColors; 668acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler private final Paint mDebugPaint = DEBUG ? new Paint() : null; 678acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler private final Interpolator mAccelerator = new AccelerateInterpolator(); 681a83af2b81a0dd6c3232dfbc55fa4a1076205b85Mario Bertschler private final float mAlphaStart; 6927288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler private final WallpaperColorInfo mWallpaperColorInfo; 70a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler private final int mScrimColor; 7148198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler 728acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler public GradientView(Context context, AttributeSet attrs) { 7348198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler super(context, attrs); 746d1e9a1012262b64646c6f765d3d9179c1700cacSunny Goyal DisplayMetrics dm = getResources().getDisplayMetrics(); 756d1e9a1012262b64646c6f765d3d9179c1700cacSunny Goyal this.mMaskHeight = Utilities.pxFromDp(ALPHA_MASK_HEIGHT_DP, dm); 766d1e9a1012262b64646c6f765d3d9179c1700cacSunny Goyal this.mMaskWidth = Utilities.pxFromDp(ALPHA_MASK_WIDTH_DP, dm); 7727288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler Launcher launcher = Launcher.getLauncher(context); 7827288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler this.mAlphaStart = launcher.getDeviceProfile().isVerticalBarLayout() ? 0 : 100; 79a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler this.mScrimColor = Themes.getAttrColor(context, R.attr.allAppsScrimColor); 8027288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler this.mWallpaperColorInfo = WallpaperColorInfo.getInstance(launcher); 816d1e9a1012262b64646c6f765d3d9179c1700cacSunny Goyal mAlphaColors = getResources().getInteger(R.integer.extracted_color_gradient_alpha); 8227288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler updateColors(); 83a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler mAlphaGradientMask = createDitheredAlphaMask(); 8427288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler } 8548198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler 8627288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler @Override 8727288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler protected void onAttachedToWindow() { 8827288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler super.onAttachedToWindow(); 8927288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler mWallpaperColorInfo.addOnChangeListener(this); 9027288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler } 9127288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler 9227288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler @Override 9327288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler protected void onDetachedFromWindow() { 9427288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler super.onDetachedFromWindow(); 9527288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler mWallpaperColorInfo.removeOnChangeListener(this); 9627288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler } 9727288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler 9827288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler @Override 9927288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler public void onExtractedColorsChanged(WallpaperColorInfo info) { 10027288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler updateColors(); 10127288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler invalidate(); 10248198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler } 10348198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler 10427288381a1e29203cd9b1354ac0b25705e55ac9aMario Bertschler private void updateColors() { 105a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler this.mColor1 = ColorUtils.setAlphaComponent(mWallpaperColorInfo.getMainColor(), 1066d1e9a1012262b64646c6f765d3d9179c1700cacSunny Goyal mAlphaColors); 107a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler this.mColor2 = ColorUtils.setAlphaComponent(mWallpaperColorInfo.getSecondaryColor(), 1086d1e9a1012262b64646c6f765d3d9179c1700cacSunny Goyal mAlphaColors); 10948198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler if (mWidth + mHeight > 0) { 11048198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler createRadialShader(); 11148198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler } 11248198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler } 11348198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler 11448198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler @Override 11548198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 11648198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler super.onMeasure(widthMeasureSpec, heightMeasureSpec); 11748198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler this.mWidth = getMeasuredWidth(); 11848198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler this.mHeight = getMeasuredHeight(); 11948198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler if (mWidth + mHeight > 0) { 12048198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler createRadialShader(); 12148198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler } 12248198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler } 12348198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler 12448198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler // only being called when colors change 12548198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler private void createRadialShader() { 1268acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler final float gradientCenterY = 1.05f; 1278acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler float radius = Math.max(mHeight, mWidth) * gradientCenterY; 12848198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler float posScreenBottom = (radius - mHeight) / radius; // center lives below screen 129a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler 130a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler RadialGradient shaderNoScrim = new RadialGradient( 1318acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler mWidth * 0.5f, 1328acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler mHeight * gradientCenterY, 13348198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler radius, 1348acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler new int[] {mColor1, mColor1, mColor2}, 13548198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler new float[] {0f, posScreenBottom, 1f}, 13648198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler Shader.TileMode.CLAMP); 137a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler mPaintNoScrim.setShader(shaderNoScrim); 138a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler 139a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler int color1 = ColorUtils.compositeColors(mScrimColor,mColor1); 140a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler int color2 = ColorUtils.compositeColors(mScrimColor,mColor2); 141a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler RadialGradient shaderWithScrim = new RadialGradient( 142a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler mWidth * 0.5f, 143a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler mHeight * gradientCenterY, 144a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler radius, 145a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler new int[] { color1, color1, color2 }, 146a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler new float[] {0f, posScreenBottom, 1f}, 147a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler Shader.TileMode.CLAMP); 148a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler mPaintWithScrim.setShader(shaderWithScrim); 14948198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler } 15048198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler 15148198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler public void setProgress(float progress) { 152a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler setProgress(progress, true); 153a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler } 154a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler 155a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler public void setProgress(float progress, boolean showScrim) { 15648198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler this.mProgress = progress; 157a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler this.mShowScrim = showScrim; 15848198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler invalidate(); 15948198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler } 16048198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler 16148198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler @Override 16248198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler protected void onDraw(Canvas canvas) { 163a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler Paint paint = mShowScrim ? mPaintWithScrim : mPaintNoScrim; 164a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler 1658acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler float head = 0.29f; 16648198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler float linearProgress = head + (mProgress * (1f - head)); 1678acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler float startMaskY = (1f - linearProgress) * mHeight - mMaskHeight * linearProgress; 1681a83af2b81a0dd6c3232dfbc55fa4a1076205b85Mario Bertschler float interpolatedAlpha = (255 - mAlphaStart) * mAccelerator.getInterpolation(mProgress); 169a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler paint.setAlpha((int) (mAlphaStart + interpolatedAlpha)); 170a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler float div = (float) Math.floor(startMaskY + mMaskHeight); 171a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler mAlphaMaskRect.set(0, startMaskY, mWidth, div); 172a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler mFinalMaskRect.set(0, div, mWidth, mHeight); 173a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler canvas.drawBitmap(mAlphaGradientMask, null, mAlphaMaskRect, paint); 174a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler canvas.drawRect(mFinalMaskRect, paint); 1758acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler 1768acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler if (DEBUG) { 1778acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler mDebugPaint.setColor(0xFF00FF00); 1788acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler canvas.drawLine(0, startMaskY, mWidth, startMaskY, mDebugPaint); 1798acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler canvas.drawLine(0, startMaskY + mMaskHeight, mWidth, startMaskY + mMaskHeight, mDebugPaint); 1808acf8b506d8c5db2ddcac825a24d0a3bda9fe100Mario Bertschler } 18148198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler } 182a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler 183a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler public Bitmap createDitheredAlphaMask() { 184a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler Bitmap dst = Bitmap.createBitmap(mMaskWidth, mMaskHeight, Bitmap.Config.ALPHA_8); 185a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler Canvas c = new Canvas(dst); 186a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler Paint paint = new Paint(Paint.DITHER_FLAG); 187a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler LinearGradient lg = new LinearGradient(0, 0, 0, mMaskHeight, 188a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler new int[]{ 189a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler 0x00FFFFFF, 190a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler ColorUtils.setAlphaComponent(Color.WHITE, (int) (0xFF * 0.95)), 191a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler 0xFFFFFFFF}, 192a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler new float[]{0f, 0.8f, 1f}, 193a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler Shader.TileMode.CLAMP); 194a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler paint.setShader(lg); 195a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler c.drawRect(0, 0, mMaskWidth, mMaskHeight, paint); 196a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler return dst; 197a0465afe8de773acd371c8ebb91e92735191631dMario Bertschler } 19848198d004af64d0d7c8b86bc243087f68dc374c9Mario Bertschler}