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/*
* Copyright (C) 2011 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;
import android.content.Context;
import android.content.Intent;
import android.preference.CheckBoxPreference;
import android.util.TypedValue;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.CheckBox;
import android.widget.ImageView;
/**
* CheckBox preference that optionally shows an icon for launching a settings
* {@link android.app.Activity}. The settings activity, if intent for launching
* it was provided, can be stared only if the CheckBox in is checked.
*/
public class SettingsCheckBoxPreference extends CheckBoxPreference {
// Integer.MIN_VALUE means not initalized
private static int sDimAlpha = Integer.MIN_VALUE;
private final Intent mSettingsIntent;
/**
* Creates a new instance. The constructor is checking whether the
* settings intent is resolved to an activity and acts accordingly.
*
* @param context Context for accessing resources.
* @param intent Intent to use as settings for the item represented by
* this preference. Pass <code>null</code> if there is no associated
* settings activity.
*/
public SettingsCheckBoxPreference(Context context, Intent intent) {
super(context);
if (sDimAlpha == Integer.MIN_VALUE) {
TypedValue outValue = new TypedValue();
context.getTheme().resolveAttribute(android.R.attr.disabledAlpha, outValue, true);
sDimAlpha = (int) (outValue.getFloat() * 255);
}
if (intent != null
&& !context.getPackageManager().queryIntentActivities(intent, 0).isEmpty()) {
mSettingsIntent = intent;
} else {
mSettingsIntent = null;
}
setWidgetLayoutResource(R.layout.preference_settings_checkbox_widget);
}
@Override
protected void onBindView(View view) {
super.onBindView(view);
ImageView settingsButton = (ImageView) view.findViewById(R.id.settings_button);
if (mSettingsIntent != null) {
CheckBox checkbox = (CheckBox) view.findViewById(com.android.internal.R.id.checkbox);
if (checkbox.isChecked()) {
settingsButton.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
getContext().startActivity(mSettingsIntent);
}
});
}
settingsButton.setVisibility(View.VISIBLE);
if (checkbox.isChecked() && isEnabled()) {
settingsButton.setAlpha(255);
} else {
settingsButton.setAlpha(sDimAlpha);
}
} else {
settingsButton.setVisibility(View.GONE);
view.findViewById(R.id.divider).setVisibility(View.GONE);
}
}
}
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