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      1 /*
      2  * Copyright (c) 2016, 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 package com.android.car.radio;
     17 
     18 import android.annotation.ColorInt;
     19 import android.content.Context;
     20 import android.content.res.TypedArray;
     21 import android.graphics.drawable.Drawable;
     22 import android.util.AttributeSet;
     23 import android.widget.Button;
     24 
     25 /**
     26  * A button that represents a band the user can select in manual tuning. When this button is
     27  * selected, then it draws a rounded pill background around itself.
     28  */
     29 public class RadioBandButton extends Button {
     30     private Drawable mSelectedBackground;
     31     private Drawable mNormalBackground;
     32 
     33     @ColorInt private int mSelectedColor;
     34     @ColorInt private int mNormalColor;
     35 
     36     public RadioBandButton(Context context) {
     37         super(context);
     38         init(context, null);
     39     }
     40 
     41     public RadioBandButton(Context context, AttributeSet attrs) {
     42         super(context, attrs);
     43         init(context, attrs);
     44     }
     45 
     46     public RadioBandButton(Context context, AttributeSet attrs, int defStyleAttrs) {
     47         super(context, attrs, defStyleAttrs);
     48         init(context, attrs);
     49     }
     50 
     51     public RadioBandButton(Context context, AttributeSet attrs, int defStyleAttrs,
     52             int defStyleRes) {
     53         super(context, attrs, defStyleAttrs, defStyleRes);
     54         init(context, attrs);
     55     }
     56 
     57     /**
     58      * Initializes whether or not this button is initially selected.
     59      */
     60     private void init(Context context, AttributeSet attrs) {
     61         mSelectedBackground = context.getDrawable(R.drawable.manual_tuner_band_bg);
     62         mNormalBackground = context.getDrawable(R.drawable.radio_control_background);
     63 
     64         mSelectedColor = context.getColor(R.color.car_grey_50);
     65         mNormalColor = context.getColor(R.color.manual_tuner_channel_text);
     66 
     67         TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.RadioBandButton);
     68 
     69         try {
     70             setIsBandSelected(ta.getBoolean(R.styleable.RadioBandButton_isBandSelected, false));
     71         } finally {
     72             ta.recycle();
     73         }
     74     }
     75 
     76     /**
     77      * Sets whether or not this button has been selected. This is different from
     78      * {@link #setSelected(boolean)}.
     79      */
     80     public void setIsBandSelected(boolean selected) {
     81         if (selected) {
     82             setTextColor(mSelectedColor);
     83             setBackground(mSelectedBackground);
     84         } else {
     85             setTextColor(mNormalColor);
     86             setBackground(mNormalBackground);
     87         }
     88     }
     89 }
     90