1 /* 2 * Copyright (C) 2010 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 package com.android.quicksearchbox.preferences; 17 18 import com.android.quicksearchbox.ShortcutRepository; 19 import com.android.quicksearchbox.util.Consumer; 20 import com.android.quicksearchbox.util.Consumers; 21 22 import android.os.Handler; 23 import android.preference.Preference; 24 import android.util.Log; 25 26 /** 27 * Logic behind the 'clear shortcuts' preference. 28 */ 29 public class ClearShortcutsController implements PreferenceController { 30 31 public static final String CLEAR_SHORTCUTS_PREF = "clear_shortcuts"; 32 33 private static final boolean DBG = false; 34 private static final String TAG = "QSB.ClearShortcutsController"; 35 36 private final ShortcutRepository mShortcuts; 37 private final Handler mHandler = new Handler(); 38 39 private OkCancelPreference mClearShortcutsPreference; 40 41 42 public ClearShortcutsController(ShortcutRepository shortcuts) { 43 mShortcuts = shortcuts; 44 } 45 46 @Override 47 public void handlePreference(Preference p) { 48 mClearShortcutsPreference = (OkCancelPreference) p; 49 mClearShortcutsPreference.setListener(new OkCancelPreference.Listener() { 50 @Override 51 public void onDialogClosed(boolean okClicked) { 52 if (okClicked) { 53 clearShortcuts(); 54 } 55 } 56 }); 57 } 58 59 public void onCreateComplete() { 60 } 61 62 public void onStop() { 63 } 64 65 public void onDestroy() { 66 } 67 68 @Override 69 public void onResume() { 70 updateClearShortcutsPreference(); 71 } 72 73 /** 74 * Enables/disables the "Clear search shortcuts" preference depending 75 * on whether there is any search history. 76 */ 77 private void updateClearShortcutsPreference() { 78 mShortcuts.hasHistory(Consumers.createAsyncConsumer(mHandler, new Consumer<Boolean>() { 79 @Override 80 public boolean consume(Boolean hasHistory) { 81 if (DBG) Log.d(TAG, "hasHistory()=" + hasHistory); 82 mClearShortcutsPreference.setEnabled(hasHistory); 83 return true; 84 } 85 })); 86 } 87 88 private void clearShortcuts() { 89 Log.i(TAG, "Clearing shortcuts..."); 90 mShortcuts.clearHistory(); 91 mClearShortcutsPreference.setEnabled(false); 92 } 93 } 94
