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Commit b9f7e269 authored by Lucas Dupin's avatar Lucas Dupin
Browse files

Be forgiving with accidental horizontal scroll 

An accidental horizontal touch, due to vertical fling on the -1 screen
could lead to imperceptible change in zoom, and send a frame to client
composition. This CL adds extra padding to overlay scroll amount, to
avoid these accidental gestures.

Bug: 211245940
Test: https://ui.perfetto.dev/#!/viewer?trace_id=3260c116-c578-6dad-e047-0a327b7d346c
Change-Id: Id05e482c79c1dcc2e1ba73baf8a4a4101797bbd2
parent 46728f64

quickstep/src/com/android/launcher3/statehandlers/DepthController.java

+5 −0
Original line number Diff line number Diff line
@@ -294,6 +294,11 @@ public class DepthController implements StateHandler<LauncherState>, 
    }



    public void onOverlayScrollChanged(float progress) {

        // Add some padding to the progress, such we don't change the depth on the last frames of

        // the animation. It's possible that a user flinging the feed quickly would scroll

        // horizontally by accident, causing the device to enter client composition unnecessarily.

        progress = Math.min(progress * 1.1f, 1f);



        // Round out the progress to dedupe frequent, non-perceptable updates

        int progressI = (int) (progress * 256);

        float progressF = Utilities.boundToRange(progressI / 256f, 0f, 1f);