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      1 /*
      2  * Copyright (C) 2012 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.launcher3;
     18 
     19 import android.view.View;
     20 
     21 import com.android.launcher3.util.Thunk;
     22 
     23 public class CheckLongPressHelper {
     24 
     25     public static final int DEFAULT_LONG_PRESS_TIMEOUT = 300;
     26 
     27     @Thunk View mView;
     28     @Thunk View.OnLongClickListener mListener;
     29     @Thunk boolean mHasPerformedLongPress;
     30     private int mLongPressTimeout = DEFAULT_LONG_PRESS_TIMEOUT;
     31     private CheckForLongPress mPendingCheckForLongPress;
     32 
     33     class CheckForLongPress implements Runnable {
     34         public void run() {
     35             if ((mView.getParent() != null) && mView.hasWindowFocus()
     36                     && !mHasPerformedLongPress) {
     37                 boolean handled;
     38                 if (mListener != null) {
     39                     handled = mListener.onLongClick(mView);
     40                 } else {
     41                     handled = mView.performLongClick();
     42                 }
     43                 if (handled) {
     44                     mView.setPressed(false);
     45                     mHasPerformedLongPress = true;
     46                 }
     47             }
     48         }
     49     }
     50 
     51     public CheckLongPressHelper(View v) {
     52         mView = v;
     53     }
     54 
     55     public CheckLongPressHelper(View v, View.OnLongClickListener listener) {
     56         mView = v;
     57         mListener = listener;
     58     }
     59 
     60     /**
     61      * Overrides the default long press timeout.
     62      */
     63     public void setLongPressTimeout(int longPressTimeout) {
     64         mLongPressTimeout = longPressTimeout;
     65     }
     66 
     67     public void postCheckForLongPress() {
     68         mHasPerformedLongPress = false;
     69 
     70         if (mPendingCheckForLongPress == null) {
     71             mPendingCheckForLongPress = new CheckForLongPress();
     72         }
     73         mView.postDelayed(mPendingCheckForLongPress, mLongPressTimeout);
     74     }
     75 
     76     public void cancelLongPress() {
     77         mHasPerformedLongPress = false;
     78         if (mPendingCheckForLongPress != null) {
     79             mView.removeCallbacks(mPendingCheckForLongPress);
     80             mPendingCheckForLongPress = null;
     81         }
     82     }
     83 
     84     public boolean hasPerformedLongPress() {
     85         return mHasPerformedLongPress;
     86     }
     87 }
     88