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      1 /*
      2  * Copyright (C) 2013 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.settings.accessibility;
     18 
     19 import android.content.Intent;
     20 import android.os.Bundle;
     21 import android.support.v7.preference.Preference;
     22 import android.support.v7.preference.PreferenceScreen;
     23 import android.support.v7.preference.PreferenceViewHolder;
     24 import android.view.Menu;
     25 import android.view.MenuInflater;
     26 import android.view.MenuItem;
     27 import android.view.View;
     28 import android.view.accessibility.AccessibilityEvent;
     29 import android.view.accessibility.AccessibilityManager;
     30 import android.widget.TextView;
     31 
     32 import com.android.settings.R;
     33 import com.android.settings.SettingsActivity;
     34 import com.android.settings.SettingsPreferenceFragment;
     35 import com.android.settings.widget.SwitchBar;
     36 import com.android.settings.widget.ToggleSwitch;
     37 
     38 public abstract class ToggleFeaturePreferenceFragment
     39         extends SettingsPreferenceFragment {
     40 
     41     protected SwitchBar mSwitchBar;
     42     protected ToggleSwitch mToggleSwitch;
     43 
     44     protected String mPreferenceKey;
     45 
     46     protected CharSequence mSettingsTitle;
     47     protected Intent mSettingsIntent;
     48 
     49     @Override
     50     public void onCreate(Bundle savedInstanceState) {
     51         super.onCreate(savedInstanceState);
     52         PreferenceScreen preferenceScreen = getPreferenceManager().createPreferenceScreen(
     53                 getActivity());
     54         setPreferenceScreen(preferenceScreen);
     55     }
     56 
     57     @Override
     58     public void onViewCreated(View view, Bundle savedInstanceState) {
     59         super.onViewCreated(view, savedInstanceState);
     60 
     61         SettingsActivity activity = (SettingsActivity) getActivity();
     62         mSwitchBar = activity.getSwitchBar();
     63         mToggleSwitch = mSwitchBar.getSwitch();
     64 
     65         onProcessArguments(getArguments());
     66 
     67         // Show the "Settings" menu as if it were a preference screen
     68         if (mSettingsTitle != null && mSettingsIntent != null) {
     69             PreferenceScreen preferenceScreen = getPreferenceScreen();
     70             Preference settingsPref = new Preference(preferenceScreen.getContext());
     71             settingsPref.setTitle(mSettingsTitle);
     72             settingsPref.setIconSpaceReserved(true);
     73             settingsPref.setIntent(mSettingsIntent);
     74             preferenceScreen.addPreference(settingsPref);
     75         }
     76     }
     77 
     78     @Override
     79     public void onActivityCreated(Bundle savedInstanceState) {
     80         super.onActivityCreated(savedInstanceState);
     81         installActionBarToggleSwitch();
     82     }
     83 
     84     @Override
     85     public void onDestroyView() {
     86         super.onDestroyView();
     87 
     88         removeActionBarToggleSwitch();
     89     }
     90 
     91     protected abstract void onPreferenceToggled(String preferenceKey, boolean enabled);
     92 
     93     protected void onInstallSwitchBarToggleSwitch() {
     94         // Implement this to set a checked listener.
     95     }
     96 
     97     protected void onRemoveSwitchBarToggleSwitch() {
     98         // Implement this to reset a checked listener.
     99     }
    100 
    101     private void installActionBarToggleSwitch() {
    102         mSwitchBar.show();
    103         onInstallSwitchBarToggleSwitch();
    104     }
    105 
    106     private void removeActionBarToggleSwitch() {
    107         mToggleSwitch.setOnBeforeCheckedChangeListener(null);
    108         onRemoveSwitchBarToggleSwitch();
    109         mSwitchBar.hide();
    110     }
    111 
    112     public void setTitle(String title) {
    113         getActivity().setTitle(title);
    114     }
    115 
    116     protected void onProcessArguments(Bundle arguments) {
    117         // Key.
    118         mPreferenceKey = arguments.getString(AccessibilitySettings.EXTRA_PREFERENCE_KEY);
    119 
    120         // Enabled.
    121         if (arguments.containsKey(AccessibilitySettings.EXTRA_CHECKED)) {
    122             final boolean enabled = arguments.getBoolean(AccessibilitySettings.EXTRA_CHECKED);
    123             mSwitchBar.setCheckedInternal(enabled);
    124         }
    125 
    126         // Title.
    127         if (arguments.containsKey(AccessibilitySettings.EXTRA_TITLE)) {
    128             setTitle(arguments.getString(AccessibilitySettings.EXTRA_TITLE));
    129         }
    130 
    131         // Summary.
    132         if (arguments.containsKey(AccessibilitySettings.EXTRA_SUMMARY)) {
    133             final CharSequence summary = arguments.getCharSequence(
    134                     AccessibilitySettings.EXTRA_SUMMARY);
    135             mFooterPreferenceMixin.createFooterPreference().setTitle(summary);
    136         }
    137     }
    138 }
    139