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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.content.pm.ResolveInfo;
     21 import android.os.Bundle;
     22 import android.support.v7.preference.Preference;
     23 import android.support.v7.preference.PreferenceScreen;
     24 import android.view.View;
     25 
     26 import com.android.settings.R;
     27 import com.android.settings.SettingsActivity;
     28 import com.android.settings.SettingsPreferenceFragment;
     29 import com.android.settings.widget.SwitchBar;
     30 import com.android.settings.widget.ToggleSwitch;
     31 
     32 public abstract class ToggleFeaturePreferenceFragment extends SettingsPreferenceFragment {
     33 
     34     protected SwitchBar mSwitchBar;
     35     protected ToggleSwitch mToggleSwitch;
     36 
     37     protected String mPreferenceKey;
     38 
     39     protected CharSequence mSettingsTitle;
     40     protected Intent mSettingsIntent;
     41 
     42     @Override
     43     public void onCreate(Bundle savedInstanceState) {
     44         super.onCreate(savedInstanceState);
     45         final int resId = getPreferenceScreenResId();
     46         if (resId <= 0) {
     47             PreferenceScreen preferenceScreen = getPreferenceManager().createPreferenceScreen(
     48                     getActivity());
     49             setPreferenceScreen(preferenceScreen);
     50         }
     51     }
     52 
     53     @Override
     54     public void onViewCreated(View view, Bundle savedInstanceState) {
     55         super.onViewCreated(view, savedInstanceState);
     56 
     57         SettingsActivity activity = (SettingsActivity) getActivity();
     58         mSwitchBar = activity.getSwitchBar();
     59         updateSwitchBarText(mSwitchBar);
     60         mToggleSwitch = mSwitchBar.getSwitch();
     61 
     62         onProcessArguments(getArguments());
     63 
     64         // Show the "Settings" menu as if it were a preference screen
     65         if (mSettingsTitle != null && mSettingsIntent != null) {
     66             PreferenceScreen preferenceScreen = getPreferenceScreen();
     67             Preference settingsPref = new Preference(preferenceScreen.getContext());
     68             settingsPref.setTitle(mSettingsTitle);
     69             settingsPref.setIconSpaceReserved(true);
     70             settingsPref.setIntent(mSettingsIntent);
     71             preferenceScreen.addPreference(settingsPref);
     72         }
     73     }
     74 
     75     @Override
     76     public void onActivityCreated(Bundle savedInstanceState) {
     77         super.onActivityCreated(savedInstanceState);
     78         installActionBarToggleSwitch();
     79     }
     80 
     81     @Override
     82     public void onDestroyView() {
     83         super.onDestroyView();
     84 
     85         removeActionBarToggleSwitch();
     86     }
     87 
     88     protected void updateSwitchBarText(SwitchBar switchBar) {
     89         // Implement this to provide meaningful text in switch bar
     90         switchBar.setSwitchBarText(R.string.accessibility_service_master_switch_title,
     91                 R.string.accessibility_service_master_switch_title);
     92     }
     93 
     94     protected abstract void onPreferenceToggled(String preferenceKey, boolean enabled);
     95 
     96     protected void onInstallSwitchBarToggleSwitch() {
     97         // Implement this to set a checked listener.
     98     }
     99 
    100     protected void onRemoveSwitchBarToggleSwitch() {
    101         // Implement this to reset a checked listener.
    102     }
    103 
    104     private void installActionBarToggleSwitch() {
    105         mSwitchBar.show();
    106         onInstallSwitchBarToggleSwitch();
    107     }
    108 
    109     private void removeActionBarToggleSwitch() {
    110         mToggleSwitch.setOnBeforeCheckedChangeListener(null);
    111         onRemoveSwitchBarToggleSwitch();
    112         mSwitchBar.hide();
    113     }
    114 
    115     public void setTitle(String title) {
    116         getActivity().setTitle(title);
    117     }
    118 
    119     protected void onProcessArguments(Bundle arguments) {
    120         // Key.
    121         mPreferenceKey = arguments.getString(AccessibilitySettings.EXTRA_PREFERENCE_KEY);
    122 
    123         // Enabled.
    124         if (arguments.containsKey(AccessibilitySettings.EXTRA_CHECKED)) {
    125             final boolean enabled = arguments.getBoolean(AccessibilitySettings.EXTRA_CHECKED);
    126             mSwitchBar.setCheckedInternal(enabled);
    127         }
    128 
    129         // Title.
    130         if (arguments.containsKey(AccessibilitySettings.EXTRA_RESOLVE_INFO)) {
    131             ResolveInfo info = arguments.getParcelable(AccessibilitySettings.EXTRA_RESOLVE_INFO);
    132             getActivity().setTitle(info.loadLabel(getPackageManager()).toString());
    133         } else if (arguments.containsKey(AccessibilitySettings.EXTRA_TITLE)) {
    134             setTitle(arguments.getString(AccessibilitySettings.EXTRA_TITLE));
    135         }
    136 
    137         // Summary.
    138         if (arguments.containsKey(AccessibilitySettings.EXTRA_SUMMARY_RES)) {
    139             final int summary = arguments.getInt(AccessibilitySettings.EXTRA_SUMMARY_RES);
    140             mFooterPreferenceMixin.createFooterPreference().setTitle(summary);
    141         } else if (arguments.containsKey(AccessibilitySettings.EXTRA_SUMMARY)) {
    142             final CharSequence summary = arguments.getCharSequence(
    143                     AccessibilitySettings.EXTRA_SUMMARY);
    144             mFooterPreferenceMixin.createFooterPreference().setTitle(summary);
    145         }
    146     }
    147 }
    148