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      1 /*
      2  * Copyright (C) 2014 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 android.view;
     18 
     19 import android.view.ActionMode.Callback;
     20 import android.view.WindowManager.LayoutParams;
     21 import android.view.accessibility.AccessibilityEvent;
     22 
     23 /**
     24  * An empty implementation of {@link Window.Callback} that always returns null/false.
     25  */
     26 public class WindowCallback implements Window.Callback {
     27     @Override
     28     public boolean dispatchKeyEvent(KeyEvent event) {
     29         return false;
     30     }
     31 
     32     @Override
     33     public boolean dispatchKeyShortcutEvent(KeyEvent event) {
     34         return false;
     35     }
     36 
     37     @Override
     38     public boolean dispatchTouchEvent(MotionEvent event) {
     39         return false;
     40     }
     41 
     42     @Override
     43     public boolean dispatchTrackballEvent(MotionEvent event) {
     44         return false;
     45     }
     46 
     47     @Override
     48     public boolean dispatchGenericMotionEvent(MotionEvent event) {
     49         return false;
     50     }
     51 
     52     @Override
     53     public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
     54         return false;
     55     }
     56 
     57     @Override
     58     public View onCreatePanelView(int featureId) {
     59         return null;
     60     }
     61 
     62     @Override
     63     public boolean onCreatePanelMenu(int featureId, Menu menu) {
     64         return false;
     65     }
     66 
     67     @Override
     68     public boolean onPreparePanel(int featureId, View view, Menu menu) {
     69         return false;
     70     }
     71 
     72     @Override
     73     public boolean onMenuOpened(int featureId, Menu menu) {
     74         return false;
     75     }
     76 
     77     @Override
     78     public boolean onMenuItemSelected(int featureId, MenuItem item) {
     79         return false;
     80     }
     81 
     82     @Override
     83     public void onWindowAttributesChanged(LayoutParams attrs) {
     84 
     85     }
     86 
     87     @Override
     88     public void onContentChanged() {
     89 
     90     }
     91 
     92     @Override
     93     public void onWindowFocusChanged(boolean hasFocus) {
     94 
     95     }
     96 
     97     @Override
     98     public void onAttachedToWindow() {
     99 
    100     }
    101 
    102     @Override
    103     public void onDetachedFromWindow() {
    104 
    105     }
    106 
    107     @Override
    108     public void onPanelClosed(int featureId, Menu menu) {
    109 
    110     }
    111 
    112     @Override
    113     public boolean onSearchRequested() {
    114         return false;
    115     }
    116 
    117     @Override
    118     public ActionMode onWindowStartingActionMode(Callback callback) {
    119         return null;
    120     }
    121 
    122     @Override
    123     public void onActionModeStarted(ActionMode mode) {
    124 
    125     }
    126 
    127     @Override
    128     public void onActionModeFinished(ActionMode mode) {
    129 
    130     }
    131 }
    132