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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"); you may not use this file
      5  * except in compliance with the License. You may obtain a copy of the License at
      6  *
      7  *      http://www.apache.org/licenses/LICENSE-2.0
      8  *
      9  * Unless required by applicable law or agreed to in writing, software distributed under the
     10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     11  * KIND, either express or implied. See the License for the specific language governing
     12  * permissions and limitations under the License.
     13  */
     14 
     15 package com.android.systemui.tuner;
     16 
     17 import android.content.ClipData;
     18 import android.content.ClipboardManager;
     19 import android.content.ClipboardManager.OnPrimaryClipChangedListener;
     20 import android.content.Context;
     21 import android.util.AttributeSet;
     22 import android.view.DragEvent;
     23 import android.view.MotionEvent;
     24 import android.view.View;
     25 import android.widget.ImageView;
     26 
     27 import com.android.systemui.R;
     28 
     29 public class ClipboardView extends ImageView implements OnPrimaryClipChangedListener {
     30 
     31     private static final int TARGET_COLOR = 0x4dffffff;
     32     private final ClipboardManager mClipboardManager;
     33     private ClipData mCurrentClip;
     34 
     35     public ClipboardView(Context context, AttributeSet attrs) {
     36         super(context, attrs);
     37         mClipboardManager = context.getSystemService(ClipboardManager.class);
     38     }
     39 
     40     @Override
     41     protected void onAttachedToWindow() {
     42         super.onAttachedToWindow();
     43         startListening();
     44     }
     45 
     46     @Override
     47     protected void onDetachedFromWindow() {
     48         super.onDetachedFromWindow();
     49         stopListening();
     50     }
     51 
     52     @Override
     53     public boolean onTouchEvent(MotionEvent ev) {
     54         if (ev.getActionMasked() == MotionEvent.ACTION_DOWN && mCurrentClip != null) {
     55             startPocketDrag();
     56         }
     57         return super.onTouchEvent(ev);
     58     }
     59 
     60     @Override
     61     public boolean onDragEvent(DragEvent event) {
     62         switch (event.getAction()) {
     63             case DragEvent.ACTION_DRAG_ENTERED:
     64                 setBackgroundDragTarget(true);
     65                 break;
     66             case DragEvent.ACTION_DROP:
     67                 mClipboardManager.setPrimaryClip(event.getClipData());
     68             case DragEvent.ACTION_DRAG_EXITED:
     69             case DragEvent.ACTION_DRAG_ENDED:
     70                 setBackgroundDragTarget(false);
     71                 break;
     72         }
     73         return true;
     74     }
     75 
     76     private void setBackgroundDragTarget(boolean isTarget) {
     77         setBackgroundColor(isTarget ? TARGET_COLOR : 0);
     78     }
     79 
     80     public void startPocketDrag() {
     81         startDragAndDrop(mCurrentClip, new View.DragShadowBuilder(this), null,
     82                 View.DRAG_FLAG_GLOBAL);
     83     }
     84 
     85     public void startListening() {
     86         mClipboardManager.addPrimaryClipChangedListener(this);
     87         onPrimaryClipChanged();
     88     }
     89 
     90     public void stopListening() {
     91         mClipboardManager.removePrimaryClipChangedListener(this);
     92     }
     93 
     94     @Override
     95     public void onPrimaryClipChanged() {
     96         mCurrentClip = mClipboardManager.getPrimaryClip();
     97         setImageResource(mCurrentClip != null
     98                 ? R.drawable.clipboard_full : R.drawable.clipboard_empty);
     99     }
    100 }
    101