auto import from //depot/cupcake/@135843

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);
+}