| /* |
| * 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.content.Context; |
| import android.graphics.Bitmap; |
| import android.graphics.BitmapShader; |
| import android.graphics.Canvas; |
| import android.graphics.Color; |
| import android.graphics.ColorMatrix; |
| import android.graphics.ColorMatrixColorFilter; |
| import android.graphics.LightingColorFilter; |
| import android.graphics.Matrix; |
| import android.graphics.Paint; |
| import android.graphics.Rect; |
| import android.graphics.Region; |
| import android.graphics.Shader; |
| import android.util.AttributeSet; |
| import android.view.View; |
| import android.view.ViewDebug; |
| |
| import com.android.systemui.R; |
| 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 { |
| |
| |
| private static final ColorMatrix TMP_FILTER_COLOR_MATRIX = new ColorMatrix(); |
| private static final ColorMatrix TMP_BRIGHTNESS_COLOR_MATRIX = new ColorMatrix(); |
| |
| private Task mTask; |
| |
| // Drawing |
| @ViewDebug.ExportedProperty(category="recents") |
| Rect mThumbnailRect = new Rect(); |
| @ViewDebug.ExportedProperty(category="recents") |
| Rect mTaskViewRect = new Rect(); |
| int mCornerRadius; |
| @ViewDebug.ExportedProperty(category="recents") |
| float mDimAlpha; |
| Matrix mScaleMatrix = new Matrix(); |
| Paint mDrawPaint = new Paint(); |
| Paint mBgFillPaint = new Paint(); |
| BitmapShader mBitmapShader; |
| LightingColorFilter mLightingColorFilter = new LightingColorFilter(0xffffffff, 0); |
| |
| // Task bar clipping, the top of this thumbnail can be clipped against the opaque header |
| // bar that overlaps this thumbnail |
| View mTaskBar; |
| @ViewDebug.ExportedProperty(category="recents") |
| 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 |
| @ViewDebug.ExportedProperty(category="recents") |
| boolean mInvisible; |
| |
| @ViewDebug.ExportedProperty(category="recents") |
| boolean mDisabledInSafeMode; |
| |
| 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); |
| mBgFillPaint.setColor(Color.WHITE); |
| } |
| |
| /** |
| * Called when the task view frame changes, allowing us to move the contents of the header |
| * to match the frame changes. |
| */ |
| public void onTaskViewSizeChanged(int width, int height) { |
| // Return early if the bounds have not changed |
| if (mTaskViewRect.width() == width && mTaskViewRect.height() == height) { |
| return; |
| } |
| |
| mTaskViewRect.set(0, 0, width, height); |
| updateThumbnailScale(); |
| } |
| |
| @Override |
| protected void onDraw(Canvas canvas) { |
| if (mInvisible) { |
| return; |
| } |
| |
| int thumbnailHeight = (int) (((float) mTaskViewRect.width() / mThumbnailRect.width()) * |
| mThumbnailRect.height()); |
| if (thumbnailHeight >= mTaskViewRect.height()) { |
| // The thumbnail fills the full task view bounds, so just draw it |
| canvas.drawRoundRect(0, 0, mTaskViewRect.width(), mTaskViewRect.height(), |
| mCornerRadius, mCornerRadius, mDrawPaint); |
| } else { |
| int count = 0; |
| if (thumbnailHeight > 0) { |
| // The thumbnail only covers part of the task view bounds, so fill in the |
| // non-thumbnail space with the default background color. This is the equivalent of |
| // the GL border texture mode. |
| count = canvas.save(); |
| |
| // Since we only want the top corners to be rounded, draw slightly beyond the |
| // thumbnail height, but clip to the thumbnail height |
| canvas.clipRect(0, 0, mTaskViewRect.width(), thumbnailHeight, Region.Op.REPLACE); |
| canvas.drawRoundRect(0, 0, mTaskViewRect.width(), thumbnailHeight + mCornerRadius, |
| mCornerRadius, mCornerRadius, mDrawPaint); |
| } |
| |
| // In the remaining space, draw the background color |
| canvas.clipRect(0, thumbnailHeight, mTaskViewRect.width(), mTaskViewRect.height(), |
| Region.Op.REPLACE); |
| canvas.drawRoundRect(0, Math.max(0, thumbnailHeight - mCornerRadius), |
| mTaskViewRect.width(), mTaskViewRect.height(), mCornerRadius, mCornerRadius, |
| mBgFillPaint); |
| |
| if (thumbnailHeight > 0) { |
| canvas.restoreToCount(count); |
| } |
| } |
| } |
| |
| /** 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); |
| mThumbnailRect.set(0, 0, bm.getWidth(), bm.getHeight()); |
| updateThumbnailScale(); |
| } else { |
| mBitmapShader = null; |
| mDrawPaint.setShader(null); |
| mThumbnailRect.setEmpty(); |
| } |
| } |
| |
| /** Updates the paint to draw the thumbnail. */ |
| void updateThumbnailPaintFilter() { |
| if (mInvisible) { |
| return; |
| } |
| int mul = (int) ((1.0f - mDimAlpha) * 255); |
| if (mBitmapShader != null) { |
| if (mDisabledInSafeMode) { |
| // Brightness: C-new = C-old*(1-amount) + amount |
| TMP_FILTER_COLOR_MATRIX.setSaturation(0); |
| float scale = 1f - mDimAlpha; |
| float[] mat = TMP_BRIGHTNESS_COLOR_MATRIX.getArray(); |
| mat[0] = scale; |
| mat[6] = scale; |
| mat[12] = scale; |
| mat[4] = mDimAlpha; |
| mat[9] = mDimAlpha; |
| mat[14] = mDimAlpha; |
| TMP_FILTER_COLOR_MATRIX.preConcat(TMP_BRIGHTNESS_COLOR_MATRIX); |
| ColorMatrixColorFilter filter = new ColorMatrixColorFilter(TMP_FILTER_COLOR_MATRIX); |
| mDrawPaint.setColorFilter(filter); |
| mBgFillPaint.setColorFilter(filter); |
| } else { |
| mLightingColorFilter.setColorMultiply(Color.argb(255, mul, mul, mul)); |
| mDrawPaint.setColorFilter(mLightingColorFilter); |
| mDrawPaint.setColor(0xFFffffff); |
| mBgFillPaint.setColorFilter(mLightingColorFilter); |
| } |
| } else { |
| int grey = mul; |
| mDrawPaint.setColorFilter(null); |
| mDrawPaint.setColor(Color.argb(255, grey, grey, grey)); |
| } |
| if (!mInvisible) { |
| invalidate(); |
| } |
| } |
| |
| /** |
| * Updates the scale of the bitmap relative to this view. |
| */ |
| public void updateThumbnailScale() { |
| if (mBitmapShader != null) { |
| float thumbnailScale; |
| if (!mTask.isFreeformTask() || mTask.bounds == null) { |
| // If this is a stack task, or a stack task moved into the freeform workspace, then |
| // just scale this thumbnail to fit the width of the view |
| thumbnailScale = (float) mTaskViewRect.width() / mThumbnailRect.width(); |
| } else { |
| // Otherwise, if this is a freeform task with task bounds, then scale the thumbnail |
| // to fit the entire bitmap into the task bounds |
| thumbnailScale = Math.min( |
| (float) mTaskViewRect.width() / mThumbnailRect.width(), |
| (float) mTaskViewRect.height() / mThumbnailRect.height()); |
| } |
| mScaleMatrix.setScale(thumbnailScale, thumbnailScale); |
| mBitmapShader.setLocalMatrix(mScaleMatrix); |
| } |
| if (!mInvisible) { |
| invalidate(); |
| } |
| } |
| |
| /** 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(); |
| } |
| } |
| } |
| |
| /** |
| * 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, boolean disabledInSafeMode) { |
| mTask = t; |
| mDisabledInSafeMode = disabledInSafeMode; |
| if (t.thumbnail != null) { |
| setThumbnail(t.thumbnail); |
| if (t.colorBackground != 0) { |
| mBgFillPaint.setColor(t.colorBackground); |
| } |
| } else { |
| setThumbnail(null); |
| } |
| } |
| |
| /** Unbinds the thumbnail view from the task */ |
| void unbindFromTask() { |
| mTask = null; |
| setThumbnail(null); |
| } |
| } |