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-rw-r--r--src/com/android/launcher3/dragndrop/DragOptions.java40
1 files changed, 40 insertions, 0 deletions
diff --git a/src/com/android/launcher3/dragndrop/DragOptions.java b/src/com/android/launcher3/dragndrop/DragOptions.java
index 3d52a48c6..dbf46f338 100644
--- a/src/com/android/launcher3/dragndrop/DragOptions.java
+++ b/src/com/android/launcher3/dragndrop/DragOptions.java
@@ -28,4 +28,44 @@ public class DragOptions {
/** Specifies the start location for the system DnD, null when using internal DnD */
public Point systemDndStartPoint = null;
+
+ /** Determines when a deferred drag should start. By default, drags aren't deferred at all. */
+ public DeferDragCondition deferDragCondition = new DeferDragCondition();
+
+ /**
+ * Specifies a condition that must be met before DragListener#onDragStart() is called.
+ * By default, there is no condition and onDragStart() is called immediately following
+ * DragController#startDrag().
+ *
+ * This condition can be overridden, and callbacks are provided for the following cases:
+ * - The drag starts, but onDragStart() is deferred (onDeferredDragStart()).
+ * - The drag ends before the condition is met (onDropBeforeDeferredDrag()).
+ * - The condition is met (onDragStart()).
+ */
+ public static class DeferDragCondition {
+ public boolean shouldStartDeferredDrag(double distanceDragged) {
+ return true;
+ }
+
+ /**
+ * The drag has started, but onDragStart() is deferred.
+ * This happens when shouldStartDeferredDrag() returns true.
+ */
+ public void onDeferredDragStart() {
+ // Do nothing.
+ }
+
+ /**
+ * User dropped before the deferred condition was met,
+ * i.e. before shouldStartDeferredDrag() returned true.
+ */
+ public void onDropBeforeDeferredDrag() {
+ // Do nothing
+ }
+
+ /** onDragStart() has been called, now we are in a normal drag. */
+ public void onDragStart() {
+ // Do nothing
+ }
+ }
}