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      1 /*
      2  * Copyright (C) 2014 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.inputmethod.latin.settings;
     18 
     19 import android.content.Context;
     20 import android.preference.Preference;
     21 import android.util.AttributeSet;
     22 import android.view.View;
     23 import android.widget.RadioButton;
     24 
     25 import com.android.inputmethod.latin.R;
     26 
     27 /**
     28  * Radio Button preference
     29  */
     30 public class RadioButtonPreference extends Preference {
     31     interface OnRadioButtonClickedListener {
     32         /**
     33          * Called when this preference needs to be saved its state.
     34          *
     35          * @param preference This preference.
     36          */
     37         public void onRadioButtonClicked(RadioButtonPreference preference);
     38     }
     39 
     40     private boolean mIsSelected;
     41     private RadioButton mRadioButton;
     42     private OnRadioButtonClickedListener mListener;
     43     private final View.OnClickListener mClickListener = new View.OnClickListener() {
     44         @Override
     45         public void onClick(final View v) {
     46             callListenerOnRadioButtonClicked();
     47         }
     48     };
     49 
     50     public RadioButtonPreference(final Context context) {
     51         this(context, null);
     52     }
     53 
     54     public RadioButtonPreference(final Context context, final AttributeSet attrs) {
     55         this(context, attrs, android.R.attr.preferenceStyle);
     56     }
     57 
     58     public RadioButtonPreference(final Context context, final AttributeSet attrs,
     59             final int defStyleAttr) {
     60         super(context, attrs, defStyleAttr);
     61         setWidgetLayoutResource(R.layout.radio_button_preference_widget);
     62     }
     63 
     64     public void setOnRadioButtonClickedListener(final OnRadioButtonClickedListener listener) {
     65         mListener = listener;
     66     }
     67 
     68     void callListenerOnRadioButtonClicked() {
     69         if (mListener != null) {
     70             mListener.onRadioButtonClicked(this);
     71         }
     72     }
     73 
     74     @Override
     75     protected void onBindView(final View view) {
     76         super.onBindView(view);
     77         mRadioButton = (RadioButton)view.findViewById(R.id.radio_button);
     78         mRadioButton.setChecked(mIsSelected);
     79         mRadioButton.setOnClickListener(mClickListener);
     80         view.setOnClickListener(mClickListener);
     81     }
     82 
     83     public boolean isSelected() {
     84         return mIsSelected;
     85     }
     86 
     87     public void setSelected(final boolean selected) {
     88         if (selected == mIsSelected) {
     89             return;
     90         }
     91         mIsSelected = selected;
     92         if (mRadioButton != null) {
     93             mRadioButton.setChecked(selected);
     94         }
     95         notifyChanged();
     96     }
     97 }
     98