Fix PageIndicatorDots Outline

Invalidate the outline when a Folder or WidgetPicker's PageIndicatorDots
become visible with 0 scroll. Necessary to avoid stale Outlines which
appear as grey shadows.

Bug: 394355070
Test: Verified manually that this works well, and looks great in LTR mode and RTL mode.
Flag: com.android.launcher3.enable_launcher_visual_refresh
Change-Id: I3e730b1109b9cd05e25454865f7e97df2078725b

1 files changed, 7 insertions, 0 deletions

diff --git a/src/com/android/launcher3/pageindicators/PageIndicatorDots.java b/src/com/android/launcher3/pageindicators/PageIndicatorDots.java
index 211263835c..1b23fb4fd5 100644
--- a/src/com/android/launcher3/pageindicators/PageIndicatorDots.java
+++ b/src/com/android/launcher3/pageindicators/PageIndicatorDots.java
@@ -566,6 +566,13 @@ public class PageIndicatorDots extends View implements Insettable, PageIndicator
                     }
                     if (Math.round(mCurrentPosition) == i) {
                         sLastActiveRect.set(sTempRect);
+                        if (mCurrentPosition == 0) {
+                            // The outline is calculated before onDraw is called. If the user has
+                            // paginated, closed the folder, and opened the folder again, the
+                            // first drawn outline will use stale bounds.
+                            // Invalidation is cheap, and is only needed when scroll is 0.
+                            invalidateOutline();
+                        }
                     }
                     canvas.drawRoundRect(sTempRect, mDotRadius, mDotRadius, mPaginationPaint);