1 /* 2 * Copyright (C) 2017 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.gestures; 18 19 import android.content.ContentResolver; 20 import android.content.Context; 21 import android.database.ContentObserver; 22 import android.net.Uri; 23 import android.provider.Settings; 24 import android.support.v7.preference.Preference; 25 import android.support.v7.preference.PreferenceScreen; 26 27 import com.android.settings.SeekBarPreference; 28 import com.android.settings.core.PreferenceController; 29 import com.android.settings.core.lifecycle.Lifecycle; 30 import com.android.settings.core.lifecycle.LifecycleObserver; 31 import com.android.settings.core.lifecycle.events.OnPause; 32 import com.android.settings.core.lifecycle.events.OnResume; 33 import com.android.settings.overlay.FeatureFactory; 34 35 public class AssistGestureSensitivityPreferenceController extends PreferenceController 36 implements Preference.OnPreferenceChangeListener, LifecycleObserver, OnPause, OnResume { 37 38 private static final String PREF_KEY_ASSIST_GESTURE_SENSITIVITY = "gesture_assist_sensitivity"; 39 40 private final AssistGestureFeatureProvider mFeatureProvider; 41 private final SettingObserver mSettingObserver; 42 43 private PreferenceScreen mScreen; 44 private SeekBarPreference mPreference; 45 AssistGestureSensitivityPreferenceController(Context context, Lifecycle lifecycle)46 public AssistGestureSensitivityPreferenceController(Context context, Lifecycle lifecycle) { 47 super(context); 48 mFeatureProvider = FeatureFactory.getFactory(context).getAssistGestureFeatureProvider(); 49 mSettingObserver = new SettingObserver(); 50 51 if (lifecycle != null) { 52 lifecycle.addObserver(this); 53 } 54 } 55 56 @Override onResume()57 public void onResume() { 58 mSettingObserver.register(mContext.getContentResolver(), true /* register */); 59 updatePreference(); 60 } 61 62 @Override onPause()63 public void onPause() { 64 mSettingObserver.register(mContext.getContentResolver(), false /* register */); 65 } 66 67 @Override isAvailable()68 public boolean isAvailable() { 69 // The sensitivity control is contingent on the assist gesture being supported and the 70 // gesture being enabled. 71 final int gestureEnabled = Settings.Secure.getInt( 72 mContext.getContentResolver(), 73 Settings.Secure.ASSIST_GESTURE_ENABLED, 74 1); 75 return (gestureEnabled == 1) && mFeatureProvider.isSupported(mContext); 76 } 77 78 @Override displayPreference(PreferenceScreen screen)79 public void displayPreference(PreferenceScreen screen) { 80 mScreen = screen; 81 mPreference = (SeekBarPreference) screen.findPreference(getPreferenceKey()); 82 // Call super last or AbstractPreferenceController might remove the preference from the 83 // screen (if !isAvailable()) before we can save a reference to it. 84 super.displayPreference(screen); 85 } 86 87 @Override updateState(Preference preference)88 public void updateState(Preference preference) { 89 super.updateState(preference); 90 updatePreference(); 91 } 92 updatePreference()93 private void updatePreference() { 94 if (mPreference == null) { 95 return; 96 } 97 98 if (isAvailable()) { 99 if (mScreen.findPreference(getPreferenceKey()) == null) { 100 mScreen.addPreference(mPreference); 101 } 102 } else { 103 mScreen.removePreference(mPreference); 104 } 105 106 final int sensitivity = Settings.Secure.getInt( 107 mContext.getContentResolver(), 108 Settings.Secure.ASSIST_GESTURE_SENSITIVITY, 109 mPreference.getProgress()); 110 mPreference.setProgress(sensitivity); 111 } 112 113 @Override onPreferenceChange(Preference preference, Object newValue)114 public boolean onPreferenceChange(Preference preference, Object newValue) { 115 final int sensitivity = (int) newValue; 116 Settings.Secure.putInt(mContext.getContentResolver(), 117 Settings.Secure.ASSIST_GESTURE_SENSITIVITY, sensitivity); 118 return true; 119 } 120 121 @Override getPreferenceKey()122 public String getPreferenceKey() { 123 return PREF_KEY_ASSIST_GESTURE_SENSITIVITY; 124 } 125 126 class SettingObserver extends ContentObserver { 127 128 private final Uri ASSIST_GESTURE_ENABLED_URI = 129 Settings.Secure.getUriFor(Settings.Secure.ASSIST_GESTURE_ENABLED); 130 private final Uri ASSIST_GESTURE_SENSITIVITY_URI = 131 Settings.Secure.getUriFor(Settings.Secure.ASSIST_GESTURE_SENSITIVITY); 132 SettingObserver()133 public SettingObserver() { 134 super(null /* handler */); 135 } 136 register(ContentResolver cr, boolean register)137 public void register(ContentResolver cr, boolean register) { 138 if (register) { 139 cr.registerContentObserver(ASSIST_GESTURE_ENABLED_URI, false, this); 140 cr.registerContentObserver(ASSIST_GESTURE_SENSITIVITY_URI, false, this); 141 } else { 142 cr.unregisterContentObserver(this); 143 } 144 } 145 146 @Override onChange(boolean selfChange)147 public void onChange(boolean selfChange) { 148 updatePreference(); 149 } 150 } 151 } 152