Simplifying clear-all transparency calculation
Bug: 78788182
Change-Id: Idb66629f0dcc09240f38f37554a7ff50dbeefb7d
Testing: Manual
diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index ce460bc..6de6b0a 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -327,25 +327,12 @@
final int childCount = getChildCount();
if (mShowEmptyMessage || childCount == 0) return 0;
- final View lastChild = getChildAt(childCount - 1);
-
- // Current visible coordinate of the end of the oldest task.
- final int carouselCurrentEnd =
- (mIsRtl ? lastChild.getLeft() : lastChild.getRight()) - getScrollX();
-
- // Visible button-facing end of a centered task.
- final int centeredTaskEnd = mIsRtl ?
- getPaddingLeft() + mInsets.left :
- getWidth() - getPaddingRight() - mInsets.right;
-
- // The distance of the carousel travel during which the alpha changes from 0 to 1. This
- // is the motion between the oldest task in its centered position and the oldest task
- // scrolled to the end.
- final int alphaChangeRange = (mIsRtl ? 0 : mMaxScrollX) - getScrollForPage(childCount - 1);
+ final int scrollEnd = mIsRtl ? 0 : mMaxScrollX;
+ final int oldestChildScroll = getScrollForPage(childCount - 1);
return Utilities.boundToRange(
- ((float) (centeredTaskEnd - carouselCurrentEnd)) /
- alphaChangeRange, 0, 1);
+ ((float) (getScrollX() - oldestChildScroll)) /
+ (scrollEnd - oldestChildScroll), 0, 1);
}
private void updateClearAllButtonAlpha() {