Resue TaskView information. am: 0a5e2d6b93 (59deea52) · Commits · e / os / android_frameworks_base

packages/SystemUI/src/com/android/systemui/recents/views/grid/TaskGridLayoutAlgorithm.java

+76 −35

Original line number	Diff line number	Diff line
		@@ -52,34 +52,23 @@ public class TaskGridLayoutAlgorithm {
		private float mAppAspectRatio;
		private Rect mSystemInsets = new Rect();

		public TaskGridLayoutAlgorithm(Context context) {
		reloadOnConfigurationChange(context);
		}

		public void reloadOnConfigurationChange(Context context) {
		Resources res = context.getResources();
		mPaddingLeftRight = res.getDimensionPixelSize(R.dimen.recents_grid_padding_left_right);
		mPaddingTopBottom = res.getDimensionPixelSize(R.dimen.recents_grid_padding_top_bottom);
		mPaddingTaskView = res.getDimensionPixelSize(R.dimen.recents_grid_padding_task_view);

		mTaskGridRect = new Rect();
		mTitleBarHeight = res.getDimensionPixelSize(R.dimen.recents_grid_task_view_header_height);

		WindowManager windowManager = (WindowManager) context
		.getSystemService(Context.WINDOW_SERVICE);
		windowManager.getDefaultDisplay().getRealSize(mScreenSize);

		updateAppAspectRatio();
		}
		/**
		* When the amount of tasks is determined, the size and position of every task view can be
		* decided. Each instance of TaskGridRectInfo store the task view information for a certain
		* amount of tasks.
		*/
		class TaskGridRectInfo {
		Rect size;
		int[] xOffsets;
		int[] yOffsets;

		public TaskViewTransform getTransform(int taskIndex, int taskCount,
		TaskViewTransform transformOut, TaskStackLayoutAlgorithm stackLayout) {
		public TaskGridRectInfo(int taskCount) {
		size = new Rect();
		xOffsets = new int[taskCount];
		yOffsets = new int[taskCount];

		int layoutTaskCount = Math.min(MAX_LAYOUT_TASK_COUNT, taskCount);

		// We also need to invert the index in order to display the most recent tasks first.
		int taskLayoutIndex = taskCount - taskIndex - 1;

		int tasksPerLine = layoutTaskCount < 2 ? 1 : (
		layoutTaskCount < 5 ? 2 : (
		layoutTaskCount < 7 ? 3 : 4));
		@@ -100,21 +89,66 @@ public class TaskGridLayoutAlgorithm {
		taskHeight = maxTaskHeight;
		taskWidth = (int) ((taskHeight - mTitleBarHeight) * mAppAspectRatio);
		}
		size.set(0, 0, taskWidth, taskHeight);

		int emptySpaceX = mDisplayRect.width() - 2 * mPaddingLeftRight
		- (tasksPerLine * taskWidth) - (tasksPerLine - 1) * mPaddingTaskView;
		int emptySpaceY = mDisplayRect.height() - 2 * mPaddingTopBottom
		- (lines * taskHeight) - (lines - 1) * mPaddingTaskView;

		mTaskGridRect.set(0, 0, taskWidth, taskHeight);
		for (int taskIndex = 0; taskIndex < taskCount; taskIndex++) {
		// We also need to invert the index in order to display the most recent tasks first.
		int taskLayoutIndex = taskCount - taskIndex - 1;

		int xIndex = taskLayoutIndex % tasksPerLine;
		int yIndex = taskLayoutIndex / tasksPerLine;
		int x = emptySpaceX / 2 + mPaddingLeftRight + (taskWidth + mPaddingTaskView) * xIndex;
		int y = emptySpaceY / 2 + mPaddingTopBottom + (taskHeight + mPaddingTaskView) * yIndex;
		xOffsets[taskIndex] =
		emptySpaceX / 2 + mPaddingLeftRight + (taskWidth + mPaddingTaskView) * xIndex;
		yOffsets[taskIndex] =
		emptySpaceY / 2 + mPaddingTopBottom + (taskHeight + mPaddingTaskView) * yIndex;
		}
		}
		}

		/**
		* We can find task view sizes and positions from mTaskGridRectInfoList[k - 1] when there
		* are k tasks.
		*/
		TaskGridRectInfo[] mTaskGridRectInfoList;

		public TaskGridLayoutAlgorithm(Context context) {
		reloadOnConfigurationChange(context);
		}

		public void reloadOnConfigurationChange(Context context) {
		Resources res = context.getResources();
		mPaddingLeftRight = res.getDimensionPixelSize(R.dimen.recents_grid_padding_left_right);
		mPaddingTopBottom = res.getDimensionPixelSize(R.dimen.recents_grid_padding_top_bottom);
		mPaddingTaskView = res.getDimensionPixelSize(R.dimen.recents_grid_padding_task_view);

		mTaskGridRect = new Rect();
		mTitleBarHeight = res.getDimensionPixelSize(R.dimen.recents_grid_task_view_header_height);

		WindowManager windowManager = (WindowManager) context
		.getSystemService(Context.WINDOW_SERVICE);
		windowManager.getDefaultDisplay().getRealSize(mScreenSize);

		updateAppAspectRatio();
		}

		public TaskViewTransform getTransform(int taskIndex, int taskCount,
		TaskViewTransform transformOut, TaskStackLayoutAlgorithm stackLayout) {

		TaskGridRectInfo gridInfo = mTaskGridRectInfoList[taskCount - 1];
		mTaskGridRect.set(gridInfo.size);

		int x = gridInfo.xOffsets[taskIndex];
		int y = gridInfo.yOffsets[taskIndex];
		float z = stackLayout.mMaxTranslationZ;

		float dimAlpha = 0f;
		float viewOutlineAlpha = 0f;
		// We also need to invert the index in order to display the most recent tasks first.
		int taskLayoutIndex = taskCount - taskIndex - 1;
		boolean isTaskViewVisible = (taskLayoutIndex < MAX_LAYOUT_TASK_COUNT);

		// Fill out the transform
		@@ -134,6 +168,13 @@ public class TaskGridLayoutAlgorithm {
		public void initialize(Rect displayRect, Rect windowRect) {
		mDisplayRect = displayRect;
		mWindowRect = windowRect;

		// Pre-calculate the positions and offsets of task views so that we can reuse them directly
		// in the future.
		mTaskGridRectInfoList = new TaskGridRectInfo[MAX_LAYOUT_TASK_COUNT];
		for (int i = 0; i < MAX_LAYOUT_TASK_COUNT; i++) {
		mTaskGridRectInfoList[i] = new TaskGridRectInfo(i + 1);
		}
		}

		public void setSystemInsets(Rect systemInsets) {