| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.systemui.recents.views; |
| |
| import android.animation.Animator; |
| import android.animation.AnimatorListenerAdapter; |
| import android.animation.ValueAnimator; |
| import android.content.Context; |
| import android.graphics.Bitmap; |
| import android.graphics.BitmapShader; |
| import android.graphics.Canvas; |
| import android.graphics.Color; |
| import android.graphics.LightingColorFilter; |
| import android.graphics.Matrix; |
| import android.graphics.Paint; |
| import android.graphics.Rect; |
| import android.graphics.RectF; |
| import android.graphics.Shader; |
| import android.util.AttributeSet; |
| import android.view.View; |
| import android.view.animation.AnimationUtils; |
| import android.view.animation.Interpolator; |
| import com.android.systemui.R; |
| import com.android.systemui.recents.misc.Utilities; |
| import com.android.systemui.recents.model.Task; |
| |
| |
| /** |
| * The task thumbnail view. It implements an image view that allows for animating the dim and |
| * alpha of the thumbnail image. |
| */ |
| public class TaskViewThumbnail extends View { |
| |
| // Drawing |
| int mCornerRadius; |
| float mDimAlpha; |
| Matrix mScaleMatrix = new Matrix(); |
| Paint mDrawPaint = new Paint(); |
| RectF mBitmapRect = new RectF(); |
| RectF mLayoutRect = new RectF(); |
| BitmapShader mBitmapShader; |
| LightingColorFilter mLightingColorFilter = new LightingColorFilter(0xffffffff, 0); |
| |
| Interpolator mFastOutSlowInInterpolator; |
| |
| // Thumbnail alpha |
| float mThumbnailAlpha; |
| ValueAnimator mThumbnailAlphaAnimator; |
| ValueAnimator.AnimatorUpdateListener mThumbnailAlphaUpdateListener |
| = new ValueAnimator.AnimatorUpdateListener() { |
| @Override |
| public void onAnimationUpdate(ValueAnimator animation) { |
| mThumbnailAlpha = (float) animation.getAnimatedValue(); |
| updateThumbnailPaintFilter(); |
| } |
| }; |
| |
| // Task bar clipping, the top of this thumbnail can be clipped against the opaque header |
| // bar that overlaps this thumbnail |
| View mTaskBar; |
| Rect mClipRect = new Rect(); |
| |
| // Visibility optimization, if the thumbnail height is less than the height of the header |
| // bar for the task view, then just mark this thumbnail view as invisible |
| boolean mInvisible; |
| |
| public TaskViewThumbnail(Context context) { |
| this(context, null); |
| } |
| |
| public TaskViewThumbnail(Context context, AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| public TaskViewThumbnail(Context context, AttributeSet attrs, int defStyleAttr) { |
| this(context, attrs, defStyleAttr, 0); |
| } |
| |
| public TaskViewThumbnail(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { |
| super(context, attrs, defStyleAttr, defStyleRes); |
| mDrawPaint.setColorFilter(mLightingColorFilter); |
| mDrawPaint.setFilterBitmap(true); |
| mDrawPaint.setAntiAlias(true); |
| mCornerRadius = getResources().getDimensionPixelSize( |
| R.dimen.recents_task_view_rounded_corners_radius); |
| mFastOutSlowInInterpolator = AnimationUtils.loadInterpolator(context, |
| com.android.internal.R.interpolator.fast_out_slow_in); |
| } |
| |
| @Override |
| protected void onFinishInflate() { |
| mThumbnailAlpha = getResources().getFloat(R.dimen.recents_task_view_thumbnail_alpha); |
| updateThumbnailPaintFilter(); |
| } |
| |
| @Override |
| protected void onLayout(boolean changed, int left, int top, int right, int bottom) { |
| super.onLayout(changed, left, top, right, bottom); |
| if (changed) { |
| mLayoutRect.set(0, 0, getWidth(), getHeight()); |
| updateThumbnailScale(); |
| } |
| } |
| |
| @Override |
| protected void onDraw(Canvas canvas) { |
| if (mInvisible) { |
| return; |
| } |
| // Draw the thumbnail with the rounded corners |
| canvas.drawRoundRect(0, 0, getWidth(), getHeight(), |
| mCornerRadius, |
| mCornerRadius, mDrawPaint); |
| } |
| |
| /** Sets the thumbnail to a given bitmap. */ |
| void setThumbnail(Bitmap bm) { |
| if (bm != null) { |
| mBitmapShader = new BitmapShader(bm, Shader.TileMode.CLAMP, |
| Shader.TileMode.CLAMP); |
| mDrawPaint.setShader(mBitmapShader); |
| mBitmapRect.set(0, 0, bm.getWidth(), bm.getHeight()); |
| updateThumbnailScale(); |
| } else { |
| mBitmapShader = null; |
| mDrawPaint.setShader(null); |
| } |
| updateThumbnailPaintFilter(); |
| } |
| |
| /** Updates the paint to draw the thumbnail. */ |
| void updateThumbnailPaintFilter() { |
| if (mInvisible) { |
| return; |
| } |
| int mul = (int) ((1.0f - mDimAlpha) * mThumbnailAlpha * 255); |
| int add = (int) ((1.0f - mDimAlpha) * (1 - mThumbnailAlpha) * 255); |
| if (mBitmapShader != null) { |
| mLightingColorFilter.setColorMultiply(Color.argb(255, mul, mul, mul)); |
| mLightingColorFilter.setColorAdd(Color.argb(0, add, add, add)); |
| mDrawPaint.setColorFilter(mLightingColorFilter); |
| mDrawPaint.setColor(0xffffffff); |
| } else { |
| int grey = mul + add; |
| mDrawPaint.setColorFilter(null); |
| mDrawPaint.setColor(Color.argb(255, grey, grey, grey)); |
| } |
| invalidate(); |
| } |
| |
| /** Updates the thumbnail shader's scale transform. */ |
| void updateThumbnailScale() { |
| if (mBitmapShader != null) { |
| mScaleMatrix.setRectToRect(mBitmapRect, mLayoutRect, Matrix.ScaleToFit.FILL); |
| mBitmapShader.setLocalMatrix(mScaleMatrix); |
| } |
| } |
| |
| /** Updates the clip rect based on the given task bar. */ |
| void updateClipToTaskBar(View taskBar) { |
| mTaskBar = taskBar; |
| int top = (int) Math.max(0, taskBar.getTranslationY() + |
| taskBar.getMeasuredHeight() - 1); |
| mClipRect.set(0, top, getMeasuredWidth(), getMeasuredHeight()); |
| setClipBounds(mClipRect); |
| } |
| |
| /** Updates the visibility of the the thumbnail. */ |
| void updateThumbnailVisibility(int clipBottom) { |
| boolean invisible = mTaskBar != null && (getHeight() - clipBottom) <= mTaskBar.getHeight(); |
| if (invisible != mInvisible) { |
| mInvisible = invisible; |
| if (!mInvisible) { |
| updateThumbnailPaintFilter(); |
| } |
| invalidate(); |
| } |
| } |
| |
| /** |
| * Sets the dim alpha, only used when we are not using hardware layers. |
| * (see RecentsConfiguration.useHardwareLayers) |
| */ |
| public void setDimAlpha(float dimAlpha) { |
| mDimAlpha = dimAlpha; |
| updateThumbnailPaintFilter(); |
| } |
| |
| /** Binds the thumbnail view to the task */ |
| void rebindToTask(Task t) { |
| if (t.thumbnail != null) { |
| setThumbnail(t.thumbnail); |
| } else { |
| setThumbnail(null); |
| } |
| } |
| |
| /** Unbinds the thumbnail view from the task */ |
| void unbindFromTask() { |
| setThumbnail(null); |
| } |
| |
| /** Handles focus changes. */ |
| void onFocusChanged(boolean focused) { |
| if (focused) { |
| if (Float.compare(getAlpha(), 1f) != 0) { |
| startFadeAnimation(1f, 0, 150, null); |
| } |
| } else { |
| float taskViewThumbnailAlpha = getResources().getFloat( |
| R.dimen.recents_task_view_thumbnail_alpha); |
| if (Float.compare(getAlpha(), taskViewThumbnailAlpha) != 0) { |
| startFadeAnimation(taskViewThumbnailAlpha, 0, 150, null); |
| } |
| } |
| } |
| |
| /** |
| * Prepares for the enter recents animation, this gets called before the the view |
| * is first visible and will be followed by a startEnterRecentsAnimation() call. |
| */ |
| void prepareEnterRecentsAnimation(boolean isTaskViewLaunchTargetTask) { |
| if (isTaskViewLaunchTargetTask) { |
| mThumbnailAlpha = 1f; |
| } else { |
| mThumbnailAlpha = getResources().getFloat( |
| R.dimen.recents_task_view_thumbnail_alpha); |
| } |
| updateThumbnailPaintFilter(); |
| } |
| |
| /** Animates this task thumbnail as it enters Recents. */ |
| void startEnterRecentsAnimation(int delay, Runnable postAnimRunnable) { |
| float taskViewThumbnailAlpha = getResources().getFloat( |
| R.dimen.recents_task_view_thumbnail_alpha); |
| startFadeAnimation(taskViewThumbnailAlpha, delay, |
| getResources().getInteger(R.integer.recents_task_enter_from_app_duration), |
| postAnimRunnable); |
| } |
| |
| /** Animates this task thumbnail as it exits Recents. */ |
| void startLaunchTaskAnimation(Runnable postAnimRunnable) { |
| int taskViewExitToAppDuration = mContext.getResources().getInteger( |
| R.integer.recents_task_exit_to_app_duration); |
| startFadeAnimation(1f, 0, taskViewExitToAppDuration, postAnimRunnable); |
| } |
| |
| /** Starts a new thumbnail alpha animation. */ |
| void startFadeAnimation(float finalAlpha, int delay, int duration, final Runnable postAnimRunnable) { |
| Utilities.cancelAnimationWithoutCallbacks(mThumbnailAlphaAnimator); |
| mThumbnailAlphaAnimator = ValueAnimator.ofFloat(mThumbnailAlpha, finalAlpha); |
| mThumbnailAlphaAnimator.setStartDelay(delay); |
| mThumbnailAlphaAnimator.setDuration(duration); |
| mThumbnailAlphaAnimator.setInterpolator(mFastOutSlowInInterpolator); |
| mThumbnailAlphaAnimator.addUpdateListener(mThumbnailAlphaUpdateListener); |
| if (postAnimRunnable != null) { |
| mThumbnailAlphaAnimator.addListener(new AnimatorListenerAdapter() { |
| @Override |
| public void onAnimationEnd(Animator animation) { |
| postAnimRunnable.run(); |
| } |
| }); |
| } |
| mThumbnailAlphaAnimator.start(); |
| } |
| } |