ActionBarPolicy.java revision 20ac724a3a836bfd362c911f7dc55a61c02b4d44
1bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell/* 2bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell * Copyright (C) 2012 The Android Open Source Project 3bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell * 4bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell * Licensed under the Apache License, Version 2.0 (the "License"); 5bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell * you may not use this file except in compliance with the License. 6bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell * You may obtain a copy of the License at 7bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell * 8bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell * http://www.apache.org/licenses/LICENSE-2.0 9bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell * 10bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell * Unless required by applicable law or agreed to in writing, software 11bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell * distributed under the License is distributed on an "AS IS" BASIS, 12bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell * See the License for the specific language governing permissions and 14bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell * limitations under the License. 15bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell */ 16bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell 17bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powellpackage android.support.appcompat.view; 18bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell 19bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powellimport android.content.Context; 20bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powellimport android.content.res.Resources; 21bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powellimport android.content.res.TypedArray; 22ced50ab7536cd3d3573f03310fc899f10c414d37Anirudh Dewaniimport android.support.appcompat.R; 23bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell 24bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell/** 2520ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns * Allows components to query for various configuration policy decisions about how the action bar 2620ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns * should lay out and behave on the current device. 27bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell */ 28bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powellpublic class ActionBarPolicy { 29bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell 3020ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns private Context mContext; 31bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell 3220ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns public static ActionBarPolicy get(Context context) { 3320ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns return new ActionBarPolicy(context); 3420ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns } 35bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell 3620ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns private ActionBarPolicy(Context context) { 3720ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns mContext = context; 3820ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns } 39bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell 4020ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns public int getMaxActionButtons() { 4120ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns return mContext.getResources().getInteger(R.integer.max_action_buttons); 4220ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns } 43bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell 4420ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns public boolean showsOverflowMenuButton() { 4520ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns // Permanent menu key is always present on pre-HC devices 4620ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns // return !ViewConfiguration.get(mContext).hasPermanentMenuKey(); 4720ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns return false; 4820ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns } 49bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell 5020ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns public int getEmbeddedMenuWidthLimit() { 5120ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns return mContext.getResources().getDisplayMetrics().widthPixels / 2; 5220ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns } 53bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell 5420ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns public boolean hasEmbeddedTabs() { 5520ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns final int targetSdk = mContext.getApplicationInfo().targetSdkVersion; 5620ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns // DISABLED: Compatibility implementation will not be used on JB 5720ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns /*if (targetSdk >= Build.VERSION_CODES.JELLY_BEAN) { 5820ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns return mContext.getResources().getBoolean(R.bool.action_bar_embed_tabs); 5920ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns }*/ 60bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell 6120ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns // The embedded tabs policy changed in Jellybean; give older apps the old policy 6220ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns // so they get what they expect. 6320ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns return mContext.getResources().getBoolean(R.bool.action_bar_embed_tabs_pre_jb); 64bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell } 65bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell 6620ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns public int getTabContainerHeight() { 6720ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns TypedArray a = mContext.obtainStyledAttributes(null, R.styleable.ActionBar, 6820ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns R.attr.actionBarStyle, 0); 6920ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns int height = a.getLayoutDimension(R.styleable.ActionBar_height, 0); 7020ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns Resources r = mContext.getResources(); 7120ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns if (!hasEmbeddedTabs()) { 7220ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns // Stacked tabs; limit the height 7320ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns height = Math.min(height, 7420ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns r.getDimensionPixelSize(R.dimen.action_bar_stacked_max_height)); 7520ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns } 7620ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns a.recycle(); 7720ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns return height; 7820ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns } 7920ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns 8020ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns public boolean enableHomeButtonByDefault() { 8120ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns // Older apps get the home button interaction enabled by default. 8220ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns // Newer apps need to enable it explicitly. 8320ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns return mContext.getApplicationInfo().targetSdkVersion < 14; // ICE_CREAM_SANDWICH 8420ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns } 85bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell 8620ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns public int getStackedTabMaxWidth() { 8720ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns return mContext.getResources().getDimensionPixelSize( 8820ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns R.dimen.action_bar_stacked_tab_max_width); 8920ac724a3a836bfd362c911f7dc55a61c02b4d44Trevor Johns } 90bbbb8f39d1b1d1b317c5f9237f20fe6b1d9eb17fAdam Powell} 91