@Override
public void onStackTaskRemoved(TaskStack stack, Task removedTask, Task newFrontMostTask) {
// Remove the view associated with this task, we can't rely on updateTransforms
// to work here because the task is no longer in the list
TaskView tv = getChildViewForTask(removedTask);
if (tv != null) {
mViewPool.returnViewToPool(tv);
}
// Notify the callback that we've removed the task and it can clean up after it
mCb.onTaskViewDismissed(removedTask);
// Get the stack scroll of the task to anchor to (since we are removing something, the front
// most task will be our anchor task)
Task anchorTask = null;
float prevAnchorTaskScroll = 0;
boolean pullStackForward = stack.getTaskCount() > 0;
if (pullStackForward) {
anchorTask = mStack.getFrontMostTask();
prevAnchorTaskScroll = mLayoutAlgorithm.getStackScrollForTask(anchorTask);
}
// Update the min/max scroll and animate other task views into their new positions
updateMinMaxScroll(true, mConfig.launchedWithAltTab, mConfig.launchedFromHome);
// Offset the stack by as much as the anchor task would otherwise move back
if (pullStackForward) {
float anchorTaskScroll = mLayoutAlgorithm.getStackScrollForTask(anchorTask);
mStackScroller.setStackScroll(
mStackScroller.getStackScroll() + (anchorTaskScroll - prevAnchorTaskScroll));
mStackScroller.boundScroll();
}
// Animate all the tasks into place
requestSynchronizeStackViewsWithModel(200);
// Update the new front most task
if (newFrontMostTask != null) {
TaskView frontTv = getChildViewForTask(newFrontMostTask);
if (frontTv != null) {
frontTv.onTaskBound(newFrontMostTask);
}
}
// If there are no remaining tasks, then either unfilter the current stack, or just close
// the activity if there are no filtered stacks
if (mStack.getTaskCount() == 0) {
boolean shouldFinishActivity = true;
if (mStack.hasFilteredTasks()) {
mStack.unfilterTasks();
shouldFinishActivity = (mStack.getTaskCount() == 0);
}
if (shouldFinishActivity) {
mCb.onAllTaskViewsDismissed();
}
}
}
/**
* This is called with the full window width and height to allow stack view children to perform
* the full screen transition down.
*/
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int width = MeasureSpec.getSize(widthMeasureSpec);
int height = MeasureSpec.getSize(heightMeasureSpec);
// Compute our stack/task rects
Rect taskStackBounds = new Rect(mTaskStackBounds);
taskStackBounds.bottom -= mConfig.systemInsets.bottom;
computeRects(
width, height, taskStackBounds, mConfig.launchedWithAltTab, mConfig.launchedFromHome);
// If this is the first layout, then scroll to the front of the stack and synchronize the
// stack views immediately to load all the views
if (mAwaitingFirstLayout) {
mStackScroller.setStackScrollToInitialState();
requestSynchronizeStackViewsWithModel();
synchronizeStackViewsWithModel();
}
// Measure each of the TaskViews
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
TaskView tv = (TaskView) getChildAt(i);
if (tv.isFullScreenView()) {
tv.measure(widthMeasureSpec, heightMeasureSpec);
} else {
if (tv.getBackground() != null) {
tv.getBackground().getPadding(mTmpRect);
} else {
mTmpRect.setEmpty();
}
tv.measure(
MeasureSpec.makeMeasureSpec(
mLayoutAlgorithm.mTaskRect.width() + mTmpRect.left + mTmpRect.right,
MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(
mLayoutAlgorithm.mTaskRect.height()
+ mTmpRect.top
+ mTmpRect.bottom
+ tv.getMaxFooterHeight(),
MeasureSpec.EXACTLY));
}
}
setMeasuredDimension(width, height);
}
/** ** TaskStackCallbacks Implementation *** */
@Override
public void onStackTaskAdded(TaskStack stack, Task t) {
requestSynchronizeStackViewsWithModel();
}
/** Requests that the views be synchronized with the model */
void requestSynchronizeStackViewsWithModel() {
requestSynchronizeStackViewsWithModel(0);
}
/** ** TaskStackViewScroller.TaskStackViewScrollerCallbacks *** */
@Override
public void onScrollChanged(float p) {
mUIDozeTrigger.poke();
requestSynchronizeStackViewsWithModel();
postInvalidateOnAnimation();
}
@Override
public void onTaskViewFullScreenTransitionCompleted() {
requestSynchronizeStackViewsWithModel();
}
