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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.documentsui.dirlist;
     18 
     19 import android.view.DragEvent;
     20 import android.view.View;
     21 
     22 import com.android.documentsui.DragAndDropHelper;
     23 import com.android.documentsui.ItemDragListener;
     24 
     25 import java.util.TimerTask;
     26 
     27 import javax.annotation.Nullable;
     28 
     29 class DirectoryDragListener extends ItemDragListener<DirectoryFragment> {
     30 
     31     DirectoryDragListener(DirectoryFragment fragment) {
     32         super(fragment);
     33     }
     34 
     35     @Override
     36     public boolean onDrag(View v, DragEvent event) {
     37         final boolean result = super.onDrag(v, event);
     38 
     39         switch (event.getAction()) {
     40             case DragEvent.ACTION_DRAG_ENDED:
     41                 // getResult() is true if drag was accepted
     42                 mDragHost.dragStopped(event.getResult());
     43                 break;
     44             default:
     45                 break;
     46         }
     47 
     48         return result;
     49     }
     50 
     51     @Override
     52     public boolean handleDropEventChecked(View v, DragEvent event) {
     53         return mDragHost.handleDropEvent(v, event);
     54     }
     55 
     56     @Override
     57     public @Nullable TimerTask createOpenTask(final View v, DragEvent event) {
     58         return DragAndDropHelper.canCopyTo(event.getLocalState(), mDragHost.getDestination(v))
     59                 ? super.createOpenTask(v, event) : null;
     60     }
     61 }