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 import android.view.ViewConfiguration; 21 22 import com.android.launcher3.util.Thunk; 23 24 public class CheckLongPressHelper { 25 26 public static final float DEFAULT_LONG_PRESS_TIMEOUT_FACTOR = 0.75f; 27 28 @Thunk View mView; 29 @Thunk View.OnLongClickListener mListener; 30 @Thunk boolean mHasPerformedLongPress; 31 private float mLongPressTimeoutFactor = DEFAULT_LONG_PRESS_TIMEOUT_FACTOR; 32 private CheckForLongPress mPendingCheckForLongPress; 33 34 class CheckForLongPress implements Runnable { run()35 public void run() { 36 if ((mView.getParent() != null) && mView.hasWindowFocus() 37 && !mHasPerformedLongPress) { 38 boolean handled; 39 if (mListener != null) { 40 handled = mListener.onLongClick(mView); 41 } else { 42 handled = mView.performLongClick(); 43 } 44 if (handled) { 45 mView.setPressed(false); 46 mHasPerformedLongPress = true; 47 } 48 } 49 } 50 } 51 CheckLongPressHelper(View v)52 public CheckLongPressHelper(View v) { 53 mView = v; 54 } 55 CheckLongPressHelper(View v, View.OnLongClickListener listener)56 public CheckLongPressHelper(View v, View.OnLongClickListener listener) { 57 mView = v; 58 mListener = listener; 59 } 60 61 /** 62 * Overrides the default long press timeout. 63 */ setLongPressTimeoutFactor(float longPressTimeoutFactor)64 public void setLongPressTimeoutFactor(float longPressTimeoutFactor) { 65 mLongPressTimeoutFactor = longPressTimeoutFactor; 66 } 67 postCheckForLongPress()68 public void postCheckForLongPress() { 69 mHasPerformedLongPress = false; 70 71 if (mPendingCheckForLongPress == null) { 72 mPendingCheckForLongPress = new CheckForLongPress(); 73 } 74 mView.postDelayed(mPendingCheckForLongPress, 75 (long) (ViewConfiguration.getLongPressTimeout() * mLongPressTimeoutFactor)); 76 } 77 cancelLongPress()78 public void cancelLongPress() { 79 mHasPerformedLongPress = false; 80 if (mPendingCheckForLongPress != null) { 81 mView.removeCallbacks(mPendingCheckForLongPress); 82 mPendingCheckForLongPress = null; 83 } 84 } 85 hasPerformedLongPress()86 public boolean hasPerformedLongPress() { 87 return mHasPerformedLongPress; 88 } 89 } 90