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Commit bb7ab586 authored by Vaibhav Devmurari's avatar Vaibhav Devmurari
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Make drag window a trusted overlay 

We added new functionality to pilferPointers API in ag/18234604.
Using it we can extend the functionality of drag and drop to
allow user to interact with the UI while using 1 pointer/finger
to drag.
DD: go/global_drag_and_drop

Bug: 220109830

Test: atest inputflinger_tests
Change-Id: Ieb890ce71c938b4f8c6b0256fe14887b9e3968d1
parent 8ef7dc58

services/core/java/com/android/server/wm/DragState.java

+9 −4
Original line number Diff line number Diff line
@@ -367,10 +367,15 @@ class DragState { 
            mDragWindowHandle.ownerUid = MY_UID;

            mDragWindowHandle.scaleFactor = 1.0f;



            // Keep the default behavior of this window to be focusable, which allows the system

            // to consume keys when dragging is active. This can also be used to modify the drag

            // state on key press. For example, cancel drag on escape key.

            mDragWindowHandle.inputConfig = InputConfig.PREVENT_SPLITTING;

            // InputConfig.PREVENT_SPLITTING: To keep the default behavior of this window to be

            // focusable, which allows the system to consume keys when dragging is active. This can

            // also be used to modify the drag state on key press. For example, cancel drag on

            // escape key.

            // InputConfig.TRUSTED_OVERLAY: To not block any touches while D&D ongoing and allowing

            // touches to pass through to windows underneath. This allows user to interact with the

            // UI to navigate while dragging.

            mDragWindowHandle.inputConfig =

                    InputConfig.PREVENT_SPLITTING | InputConfig.TRUSTED_OVERLAY;



            // The drag window cannot receive new touches.

            mDragWindowHandle.touchableRegion.setEmpty();