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Commit 5c59e049 authored Jul 26, 2021 by Tetsui Ohkubo

Expose drag recipient change to IDragDropCallback

During drag & drop, dragRecipientEntered / dragRecipientExited notifies
the framework that it has entered / exited a View which can handle drop
events. Currently, they are not used, but OEMs e.g. ARC may want to
implement additional logic based on dragRecipientEntered/Exited notified
by apps.

Test: m
Bug: 194638945
Change-Id: Iace73c454aff3029bd181506740fa4ff9431f355

parent c689abb7

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

+2 −0

Original line number	Diff line number	Diff line
		@@ -291,12 +291,14 @@ class DragDropController {
		if (DEBUG_DRAG) {
		Slog.d(TAG_WM, "Drag into new candidate view @ " + window.asBinder());
		}
		mCallback.get().dragRecipientEntered(window);
		}

		void dragRecipientExited(IWindow window) {
		if (DEBUG_DRAG) {
		Slog.d(TAG_WM, "Drag from old candidate view @ " + window.asBinder());
		}
		mCallback.get().dragRecipientExited(window);
		}

		/**

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

+10 −0

Original line number	Diff line number	Diff line
		@@ -288,6 +288,16 @@ public abstract class WindowManagerInternal {
		* Called when drag operation was cancelled.
		*/
		default void postCancelDragAndDrop() {}

		/**
		* Called when it has entered a View that is willing to accept the drop.
		*/
		default void dragRecipientEntered(IWindow window) {}

		/**
		* Called when it has exited a View that is willing to accept the drop.
		*/
		default void dragRecipientExited(IWindow window) {}
		}

		/**