MenuDialogHelper.java revision 696cba573e651b0e4f18a4718627c8ccecb3bda0
1/* 2 * Copyright (C) 2006 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 17package com.android.internal.view.menu; 18 19import android.app.AlertDialog; 20import android.app.Dialog; 21import android.content.DialogInterface; 22import android.os.IBinder; 23import android.view.KeyEvent; 24import android.view.View; 25import android.view.Window; 26import android.view.WindowManager; 27 28/** 29 * Helper for menus that appear as Dialogs (context and submenus). 30 * 31 * @hide 32 */ 33public class MenuDialogHelper implements DialogInterface.OnKeyListener, 34 DialogInterface.OnClickListener, 35 DialogInterface.OnDismissListener, 36 MenuPresenter.Callback { 37 private MenuBuilder mMenu; 38 private AlertDialog mDialog; 39 ListMenuPresenter mPresenter; 40 41 public MenuDialogHelper(MenuBuilder menu) { 42 mMenu = menu; 43 } 44 45 /** 46 * Shows menu as a dialog. 47 * 48 * @param windowToken Optional token to assign to the window. 49 */ 50 public void show(IBinder windowToken) { 51 // Many references to mMenu, create local reference 52 final MenuBuilder menu = mMenu; 53 54 // Get the builder for the dialog 55 final AlertDialog.Builder builder = new AlertDialog.Builder(menu.getContext()); 56 57 mPresenter = new ListMenuPresenter(builder.getContext(), 58 com.android.internal.R.layout.list_menu_item_layout); 59 60 mPresenter.setCallback(this); 61 mMenu.addMenuPresenter(mPresenter); 62 builder.setAdapter(mPresenter.getAdapter(), this); 63 64 // Set the title 65 final View headerView = menu.getHeaderView(); 66 if (headerView != null) { 67 // Menu's client has given a custom header view, use it 68 builder.setCustomTitle(headerView); 69 } else { 70 // Otherwise use the (text) title and icon 71 builder.setIcon(menu.getHeaderIcon()).setTitle(menu.getHeaderTitle()); 72 } 73 74 // Set the key listener 75 builder.setOnKeyListener(this); 76 77 // Show the menu 78 mDialog = builder.create(); 79 mDialog.setOnDismissListener(this); 80 81 WindowManager.LayoutParams lp = mDialog.getWindow().getAttributes(); 82 lp.type = WindowManager.LayoutParams.TYPE_APPLICATION_ATTACHED_DIALOG; 83 if (windowToken != null) { 84 lp.token = windowToken; 85 } 86 lp.flags |= WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM; 87 88 mDialog.show(); 89 } 90 91 public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) { 92 if (keyCode == KeyEvent.KEYCODE_MENU || keyCode == KeyEvent.KEYCODE_BACK) { 93 if (event.getAction() == KeyEvent.ACTION_DOWN 94 && event.getRepeatCount() == 0) { 95 Window win = mDialog.getWindow(); 96 if (win != null) { 97 View decor = win.getDecorView(); 98 if (decor != null) { 99 KeyEvent.DispatcherState ds = decor.getKeyDispatcherState(); 100 if (ds != null) { 101 ds.startTracking(event, this); 102 return true; 103 } 104 } 105 } 106 } else if (event.getAction() == KeyEvent.ACTION_UP && !event.isCanceled()) { 107 Window win = mDialog.getWindow(); 108 if (win != null) { 109 View decor = win.getDecorView(); 110 if (decor != null) { 111 KeyEvent.DispatcherState ds = decor.getKeyDispatcherState(); 112 if (ds != null && ds.isTracking(event)) { 113 mMenu.close(true); 114 dialog.dismiss(); 115 return true; 116 } 117 } 118 } 119 } 120 } 121 122 // Menu shortcut matching 123 return mMenu.performShortcut(keyCode, event, 0); 124 125 } 126 127 /** 128 * Dismisses the menu's dialog. 129 * 130 * @see Dialog#dismiss() 131 */ 132 public void dismiss() { 133 if (mDialog != null) { 134 mDialog.dismiss(); 135 } 136 } 137 138 @Override 139 public void onDismiss(DialogInterface dialog) { 140 mPresenter.onCloseMenu(mMenu, true); 141 } 142 143 @Override 144 public void onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing) { 145 if (allMenusAreClosing || menu == mMenu) { 146 dismiss(); 147 } 148 } 149 150 @Override 151 public boolean onOpenSubMenu(MenuBuilder subMenu) { 152 return false; 153 } 154 155 public void onClick(DialogInterface dialog, int which) { 156 mMenu.performItemAction((MenuItemImpl) mPresenter.getAdapter().getItem(which), 0); 157 } 158} 159