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