| /* |
| * Copyright (C) 2011 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.recent; |
| |
| import android.animation.LayoutTransition; |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.graphics.Canvas; |
| import android.graphics.LinearGradient; |
| import android.graphics.Matrix; |
| import android.graphics.Paint; |
| import android.graphics.Shader; |
| import android.graphics.drawable.Drawable; |
| import android.util.AttributeSet; |
| import android.view.View; |
| import android.view.ViewConfiguration; |
| import android.view.ViewGroup; |
| import android.widget.LinearLayout; |
| |
| import com.android.systemui.R; |
| |
| public class RecentsScrollViewPerformanceHelper { |
| public static final boolean OPTIMIZE_SW_RENDERED_RECENTS = true; |
| public static final boolean USE_DARK_FADE_IN_HW_ACCELERATED_MODE = true; |
| private View mScrollView; |
| private LinearLayout mLinearLayout; |
| private RecentsCallback mCallback; |
| |
| private boolean mShowBackground = false; |
| private int mFadingEdgeLength; |
| private Drawable.ConstantState mBackgroundDrawable; |
| private Context mContext; |
| private boolean mIsVertical; |
| private boolean mFirstTime = true; |
| private boolean mSoftwareRendered = false; |
| private boolean mAttachedToWindow = false; |
| |
| public static RecentsScrollViewPerformanceHelper create(Context context, |
| AttributeSet attrs, View scrollView, boolean isVertical) { |
| boolean isTablet = context.getResources(). |
| getBoolean(R.bool.config_recents_interface_for_tablets); |
| if (!isTablet && (OPTIMIZE_SW_RENDERED_RECENTS || USE_DARK_FADE_IN_HW_ACCELERATED_MODE)) { |
| return new RecentsScrollViewPerformanceHelper(context, attrs, scrollView, isVertical); |
| } else { |
| return null; |
| } |
| } |
| |
| public RecentsScrollViewPerformanceHelper(Context context, |
| AttributeSet attrs, View scrollView, boolean isVertical) { |
| mScrollView = scrollView; |
| mContext = context; |
| TypedArray a = context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.View); |
| mFadingEdgeLength = a.getDimensionPixelSize(android.R.styleable.View_fadingEdgeLength, |
| ViewConfiguration.get(context).getScaledFadingEdgeLength()); |
| mIsVertical = isVertical; |
| } |
| |
| public void onAttachedToWindowCallback( |
| RecentsCallback callback, LinearLayout layout, boolean hardwareAccelerated) { |
| mSoftwareRendered = !hardwareAccelerated; |
| if ((mSoftwareRendered && OPTIMIZE_SW_RENDERED_RECENTS) |
| || USE_DARK_FADE_IN_HW_ACCELERATED_MODE) { |
| mScrollView.setVerticalFadingEdgeEnabled(false); |
| mScrollView.setHorizontalFadingEdgeEnabled(false); |
| } |
| if (mSoftwareRendered && OPTIMIZE_SW_RENDERED_RECENTS) { |
| mCallback = callback; |
| mLinearLayout = layout; |
| mAttachedToWindow = true; |
| mBackgroundDrawable = mContext.getResources() |
| .getDrawable(R.drawable.status_bar_recents_background_solid).getConstantState(); |
| updateShowBackground(); |
| } |
| |
| } |
| |
| public void addViewCallback(View newLinearLayoutChild) { |
| if (mSoftwareRendered && OPTIMIZE_SW_RENDERED_RECENTS) { |
| final View view = newLinearLayoutChild; |
| if (mShowBackground) { |
| view.setBackgroundDrawable(mBackgroundDrawable.newDrawable()); |
| view.setDrawingCacheEnabled(true); |
| view.buildDrawingCache(); |
| } else { |
| view.setBackgroundDrawable(null); |
| view.setDrawingCacheEnabled(false); |
| view.destroyDrawingCache(); |
| } |
| } |
| } |
| |
| public void onLayoutCallback() { |
| if (mSoftwareRendered && OPTIMIZE_SW_RENDERED_RECENTS) { |
| mScrollView.post(new Runnable() { |
| public void run() { |
| updateShowBackground(); |
| } |
| }); |
| } |
| } |
| |
| public void drawCallback(Canvas canvas, |
| int left, int right, int top, int bottom, int scrollX, int scrollY, |
| float topFadingEdgeStrength, float bottomFadingEdgeStrength, |
| float leftFadingEdgeStrength, float rightFadingEdgeStrength) { |
| if (mSoftwareRendered && OPTIMIZE_SW_RENDERED_RECENTS) { |
| if (mIsVertical) { |
| if (scrollY < 0) { |
| Drawable d = mBackgroundDrawable.newDrawable().getCurrent(); |
| d.setBounds(0, scrollY, mScrollView.getWidth(), 0); |
| d.draw(canvas); |
| } else { |
| final int childHeight = mLinearLayout.getHeight(); |
| if (scrollY + mScrollView.getHeight() > childHeight) { |
| Drawable d = mBackgroundDrawable.newDrawable().getCurrent(); |
| d.setBounds(0, childHeight, mScrollView.getWidth(), |
| scrollY + mScrollView.getHeight()); |
| d.draw(canvas); |
| } |
| } |
| } else { |
| if (scrollX < 0) { |
| Drawable d = mBackgroundDrawable.newDrawable().getCurrent(); |
| d.setBounds(scrollX, 0, 0, mScrollView.getHeight()); |
| d.draw(canvas); |
| } else { |
| final int childWidth = mLinearLayout.getWidth(); |
| if (scrollX + mScrollView.getWidth() > childWidth) { |
| Drawable d = mBackgroundDrawable.newDrawable().getCurrent(); |
| d.setBounds(childWidth, 0, |
| scrollX + mScrollView.getWidth(), mScrollView.getHeight()); |
| d.draw(canvas); |
| } |
| } |
| } |
| } |
| |
| if ((mSoftwareRendered && OPTIMIZE_SW_RENDERED_RECENTS) |
| || USE_DARK_FADE_IN_HW_ACCELERATED_MODE) { |
| Paint p = new Paint(); |
| Matrix matrix = new Matrix(); |
| // use use a height of 1, and then wack the matrix each time we |
| // actually use it. |
| Shader fade = new LinearGradient(0, 0, 0, 1, 0xCC000000, 0, Shader.TileMode.CLAMP); |
| // PULL OUT THIS CONSTANT |
| |
| p.setShader(fade); |
| |
| // draw the fade effect |
| boolean drawTop = false; |
| boolean drawBottom = false; |
| boolean drawLeft = false; |
| boolean drawRight = false; |
| |
| float topFadeStrength = 0.0f; |
| float bottomFadeStrength = 0.0f; |
| float leftFadeStrength = 0.0f; |
| float rightFadeStrength = 0.0f; |
| |
| final float fadeHeight = mFadingEdgeLength; |
| int length = (int) fadeHeight; |
| |
| // clip the fade length if top and bottom fades overlap |
| // overlapping fades produce odd-looking artifacts |
| if (mIsVertical && (top + length > bottom - length)) { |
| length = (bottom - top) / 2; |
| } |
| |
| // also clip horizontal fades if necessary |
| if (!mIsVertical && (left + length > right - length)) { |
| length = (right - left) / 2; |
| } |
| |
| if (mIsVertical) { |
| topFadeStrength = Math.max(0.0f, Math.min(1.0f, topFadingEdgeStrength)); |
| drawTop = topFadeStrength * fadeHeight > 1.0f; |
| bottomFadeStrength = Math.max(0.0f, Math.min(1.0f, bottomFadingEdgeStrength)); |
| drawBottom = bottomFadeStrength * fadeHeight > 1.0f; |
| } |
| |
| if (!mIsVertical) { |
| leftFadeStrength = Math.max(0.0f, Math.min(1.0f, leftFadingEdgeStrength)); |
| drawLeft = leftFadeStrength * fadeHeight > 1.0f; |
| rightFadeStrength = Math.max(0.0f, Math.min(1.0f, rightFadingEdgeStrength)); |
| drawRight = rightFadeStrength * fadeHeight > 1.0f; |
| } |
| |
| if (drawTop) { |
| matrix.setScale(1, fadeHeight * topFadeStrength); |
| matrix.postTranslate(left, top); |
| fade.setLocalMatrix(matrix); |
| canvas.drawRect(left, top, right, top + length, p); |
| } |
| |
| if (drawBottom) { |
| matrix.setScale(1, fadeHeight * bottomFadeStrength); |
| matrix.postRotate(180); |
| matrix.postTranslate(left, bottom); |
| fade.setLocalMatrix(matrix); |
| canvas.drawRect(left, bottom - length, right, bottom, p); |
| } |
| |
| if (drawLeft) { |
| matrix.setScale(1, fadeHeight * leftFadeStrength); |
| matrix.postRotate(-90); |
| matrix.postTranslate(left, top); |
| fade.setLocalMatrix(matrix); |
| canvas.drawRect(left, top, left + length, bottom, p); |
| } |
| |
| if (drawRight) { |
| matrix.setScale(1, fadeHeight * rightFadeStrength); |
| matrix.postRotate(90); |
| matrix.postTranslate(right, top); |
| fade.setLocalMatrix(matrix); |
| canvas.drawRect(right - length, top, right, bottom, p); |
| } |
| } |
| } |
| |
| public int getVerticalFadingEdgeLengthCallback() { |
| return mFadingEdgeLength; |
| } |
| |
| public int getHorizontalFadingEdgeLengthCallback() { |
| return mFadingEdgeLength; |
| } |
| |
| public void setLayoutTransitionCallback(LayoutTransition transition) { |
| if (mSoftwareRendered && OPTIMIZE_SW_RENDERED_RECENTS) { |
| if (transition != null) { |
| transition.addTransitionListener(new LayoutTransition.TransitionListener() { |
| @Override |
| public void startTransition(LayoutTransition transition, |
| ViewGroup container, View view, int transitionType) { |
| updateShowBackground(); |
| } |
| |
| @Override |
| public void endTransition(LayoutTransition transition, |
| ViewGroup container, View view, int transitionType) { |
| updateShowBackground(); |
| } |
| }); |
| } |
| } |
| } |
| |
| // Turn on/off drawing the background in our ancestor, and turn on/off drawing |
| // in the items in LinearLayout contained by this scrollview. |
| // Moving the background drawing to our children, and turning on a drawing cache |
| // for each of them, gives us a ~20fps gain when Recents is rendered in software |
| public void updateShowBackground() { |
| if (!mAttachedToWindow) { |
| // We haven't been initialized yet-- we'll get called again when we are |
| return; |
| } |
| if (mSoftwareRendered && OPTIMIZE_SW_RENDERED_RECENTS) { |
| LayoutTransition transition = mLinearLayout.getLayoutTransition(); |
| int linearLayoutSize = |
| mIsVertical ? mLinearLayout.getHeight() : mLinearLayout.getWidth(); |
| int scrollViewSize = |
| mIsVertical ? mScrollView.getHeight() : mScrollView.getWidth(); |
| boolean show = !mScrollView.isHardwareAccelerated() && |
| (linearLayoutSize > scrollViewSize) && |
| !(transition != null && transition.isRunning()) && |
| mCallback.isRecentsVisible(); |
| |
| if (!mFirstTime && show == mShowBackground) return; |
| mShowBackground = show; |
| mFirstTime = false; |
| |
| mCallback.handleShowBackground(!show); |
| for (int i = 0; i < mLinearLayout.getChildCount(); i++) { |
| View v = mLinearLayout.getChildAt(i); |
| if (show) { |
| v.setBackgroundDrawable(mBackgroundDrawable.newDrawable()); |
| v.setDrawingCacheEnabled(true); |
| v.buildDrawingCache(); |
| } else { |
| v.setDrawingCacheEnabled(false); |
| v.destroyDrawingCache(); |
| v.setBackgroundDrawable(null); |
| } |
| } |
| } |
| } |
| |
| } |