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/*
* Copyright (C) 2019 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.settingslib.widget;
import android.content.Context;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ImageView;
import androidx.preference.CheckBoxPreference;
import androidx.preference.PreferenceViewHolder;
/**
* Check box preference with check box replaced by radio button.
*
* Functionally speaking, it's actually a CheckBoxPreference. We only modified
* the widget to RadioButton to make it "look like" a RadioButtonPreference.
*
* In other words, there's no "RadioButtonPreferenceGroup" in this
* implementation. When you check one RadioButtonPreference, if you want to
* uncheck all the other preferences, you should do that by code yourself.
*
* RadioButtonPreference can assign a extraWidgetListener to show a gear icon
* on the right side that can open another page.
*/
public class RadioButtonPreference extends CheckBoxPreference {
/**
* Interface definition for a callback to be invoked when the preference is clicked.
*/
public interface OnClickListener {
/**
* Called when a preference has been clicked.
*
* @param emiter The clicked preference
*/
void onRadioButtonClicked(RadioButtonPreference emiter);
}
private OnClickListener mListener = null;
private View mAppendix;
private int mAppendixVisibility = -1;
private View mExtraWidgetContainer;
private ImageView mExtraWidget;
private View.OnClickListener mExtraWidgetOnClickListener;
/**
* Perform inflation from XML and apply a class-specific base style.
*
* @param context The {@link Context} this is associated with, through which it can
* access the current theme, resources, {@link SharedPreferences}, etc.
* @param attrs The attributes of the XML tag that is inflating the preference
* @param defStyle An attribute in the current theme that contains a reference to a style
* resource that supplies default values for the view. Can be 0 to not
* look for defaults.
*/
public RadioButtonPreference(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
/**
* Perform inflation from XML and apply a class-specific base style.
*
* @param context The {@link Context} this is associated with, through which it can
* access the current theme, resources, {@link SharedPreferences}, etc.
* @param attrs The attributes of the XML tag that is inflating the preference
*/
public RadioButtonPreference(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
/**
* Constructor to create a preference.
*
* @param context The Context this is associated with.
*/
public RadioButtonPreference(Context context) {
this(context, null);
}
/**
* Sets the callback to be invoked when this preference is clicked by the user.
*
* @param listener The callback to be invoked
*/
public void setOnClickListener(OnClickListener listener) {
mListener = listener;
}
/**
* Processes a click on the preference.
*/
@Override
public void onClick() {
if (mListener != null) {
mListener.onRadioButtonClicked(this);
}
}
/**
* Binds the created View to the data for this preference.
*
* <p>This is a good place to grab references to custom Views in the layout and set
* properties on them.
*
* <p>Make sure to call through to the superclass's implementation.
*
* @param holder The ViewHolder that provides references to the views to fill in. These views
* will be recycled, so you should not hold a reference to them after this method
* returns.
*/
@Override
public void onBindViewHolder(PreferenceViewHolder holder) {
super.onBindViewHolder(holder);
View summaryContainer = holder.findViewById(R.id.summary_container);
if (summaryContainer != null) {
summaryContainer.setVisibility(
TextUtils.isEmpty(getSummary()) ? View.GONE : View.VISIBLE);
mAppendix = holder.findViewById(R.id.appendix);
if (mAppendix != null && mAppendixVisibility != -1) {
mAppendix.setVisibility(mAppendixVisibility);
}
}
mExtraWidget = (ImageView) holder.findViewById(R.id.radio_extra_widget);
mExtraWidgetContainer = holder.findViewById(R.id.radio_extra_widget_container);
setExtraWidgetOnClickListener(mExtraWidgetOnClickListener);
}
/**
* Set the visibility state of appendix view.
*
* @param visibility One of {@link View#VISIBLE}, {@link View#INVISIBLE}, or {@link View#GONE}.
*/
public void setAppendixVisibility(int visibility) {
if (mAppendix != null) {
mAppendix.setVisibility(visibility);
}
mAppendixVisibility = visibility;
}
/**
* Sets the callback to be invoked when extra widget is clicked by the user.
*
* @param listener The callback to be invoked
*/
public void setExtraWidgetOnClickListener(View.OnClickListener listener) {
mExtraWidgetOnClickListener = listener;
if (mExtraWidget == null || mExtraWidgetContainer == null) {
return;
}
mExtraWidget.setOnClickListener(mExtraWidgetOnClickListener);
mExtraWidgetContainer.setVisibility((mExtraWidgetOnClickListener != null)
? View.VISIBLE : View.GONE);
}
private void init() {
setWidgetLayoutResource(R.layout.preference_widget_radiobutton);
setLayoutResource(R.layout.preference_radio);
setIconSpaceReserved(false);
}
}
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