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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.settings.accessibility;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.preference.Preference;
import android.preference.PreferenceScreen;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityManager;
import android.widget.TextView;
import com.android.settings.R;
import com.android.settings.SettingsActivity;
import com.android.settings.SettingsPreferenceFragment;
import com.android.settings.widget.SwitchBar;
import com.android.settings.widget.ToggleSwitch;
public abstract class ToggleFeaturePreferenceFragment
extends SettingsPreferenceFragment {
protected SwitchBar mSwitchBar;
protected ToggleSwitch mToggleSwitch;
protected String mPreferenceKey;
protected Preference mSummaryPreference;
protected CharSequence mSettingsTitle;
protected Intent mSettingsIntent;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
PreferenceScreen preferenceScreen = getPreferenceManager().createPreferenceScreen(
getActivity());
setPreferenceScreen(preferenceScreen);
mSummaryPreference = new Preference(getActivity()) {
@Override
protected void onBindView(View view) {
super.onBindView(view);
final TextView summaryView = (TextView) view.findViewById(android.R.id.summary);
summaryView.setText(getSummary());
sendAccessibilityEvent(summaryView);
}
private void sendAccessibilityEvent(View view) {
// Since the view is still not attached we create, populate,
// and send the event directly since we do not know when it
// will be attached and posting commands is not as clean.
AccessibilityManager accessibilityManager =
AccessibilityManager.getInstance(getActivity());
if (accessibilityManager.isEnabled()) {
AccessibilityEvent event = AccessibilityEvent.obtain();
event.setEventType(AccessibilityEvent.TYPE_VIEW_FOCUSED);
view.onInitializeAccessibilityEvent(event);
view.dispatchPopulateAccessibilityEvent(event);
accessibilityManager.sendAccessibilityEvent(event);
}
}
};
mSummaryPreference.setSelectable(false);
mSummaryPreference.setPersistent(false);
mSummaryPreference.setLayoutResource(R.layout.text_description_preference);
preferenceScreen.addPreference(mSummaryPreference);
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
SettingsActivity activity = (SettingsActivity) getActivity();
mSwitchBar = activity.getSwitchBar();
mToggleSwitch = mSwitchBar.getSwitch();
onProcessArguments(getArguments());
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
installActionBarToggleSwitch();
}
@Override
public void onDestroyView() {
super.onDestroyView();
removeActionBarToggleSwitch();
}
protected abstract void onPreferenceToggled(String preferenceKey, boolean enabled);
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
MenuItem menuItem = menu.add(mSettingsTitle);
menuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
menuItem.setIntent(mSettingsIntent);
}
protected void onInstallSwitchBarToggleSwitch() {
// Implement this to set a checked listener.
}
protected void onRemoveSwitchBarToggleSwitch() {
// Implement this to reset a checked listener.
}
private void installActionBarToggleSwitch() {
mSwitchBar.show();
onInstallSwitchBarToggleSwitch();
}
private void removeActionBarToggleSwitch() {
mToggleSwitch.setOnBeforeCheckedChangeListener(null);
onRemoveSwitchBarToggleSwitch();
mSwitchBar.hide();
}
public void setTitle(String title) {
getActivity().setTitle(title);
}
protected void onProcessArguments(Bundle arguments) {
if (arguments == null) {
getPreferenceScreen().removePreference(mSummaryPreference);
return;
}
// Key.
mPreferenceKey = arguments.getString(AccessibilitySettings.EXTRA_PREFERENCE_KEY);
// Enabled.
if (arguments.containsKey(AccessibilitySettings.EXTRA_CHECKED)) {
final boolean enabled = arguments.getBoolean(AccessibilitySettings.EXTRA_CHECKED);
mSwitchBar.setCheckedInternal(enabled);
}
// Title.
if (arguments.containsKey(AccessibilitySettings.EXTRA_TITLE)) {
setTitle(arguments.getString(AccessibilitySettings.EXTRA_TITLE));
}
// Summary.
if (arguments.containsKey(AccessibilitySettings.EXTRA_SUMMARY)) {
final CharSequence summary = arguments.getCharSequence(
AccessibilitySettings.EXTRA_SUMMARY);
mSummaryPreference.setSummary(summary);
// Set a transparent drawable to prevent use of the default one.
getListView().setSelector(new ColorDrawable(Color.TRANSPARENT));
getListView().setDivider(null);
} else {
getPreferenceScreen().removePreference(mSummaryPreference);
}
}
}
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