auto import from //depot/cupcake/@135843
diff --git a/src/com/android/launcher/DragController.java b/src/com/android/launcher/DragController.java
new file mode 100644
index 0000000..29cf15a
--- /dev/null
+++ b/src/com/android/launcher/DragController.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher;
+
+import android.view.View;
+
+/**
+ * Interface for initiating a drag within a view or across multiple views.
+ *
+ */
+public interface DragController {
+
+ /**
+ * Interface to receive notifications when a drag starts or stops
+ */
+ interface DragListener {
+
+ /**
+ * A drag has begun
+ *
+ * @param v The view that is being dragged
+ * @param source An object representing where the drag originated
+ * @param info The data associated with the object that is being dragged
+ * @param dragAction The drag action: either {@link DragController#DRAG_ACTION_MOVE}
+ * or {@link DragController#DRAG_ACTION_COPY}
+ */
+ void onDragStart(View v, DragSource source, Object info, int dragAction);
+
+ /**
+ * The drag has eneded
+ */
+ void onDragEnd();
+ }
+
+ /**
+ * Indicates the drag is a move.
+ */
+ public static int DRAG_ACTION_MOVE = 0;
+
+ /**
+ * Indicates the drag is a copy.
+ */
+ public static int DRAG_ACTION_COPY = 1;
+
+ /**
+ * Starts a drag
+ *
+ * @param v The view that is being dragged
+ * @param source An object representing where the drag originated
+ * @param info The data associated with the object that is being dragged
+ * @param dragAction The drag action: either {@link #DRAG_ACTION_MOVE} or
+ * {@link #DRAG_ACTION_COPY}
+ */
+ void startDrag(View v, DragSource source, Object info, int dragAction);
+
+ /**
+ * Sets the drag listner which will be notified when a drag starts or ends.
+ */
+ void setDragListener(DragListener l);
+
+ /**
+ * Remove a previously installed drag listener.
+ */
+ void removeDragListener(DragListener l);
+}