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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.content.Context;
     19 import android.content.res.TypedArray;
     20 import android.graphics.drawable.Drawable;
     21 import android.support.annotation.ColorInt;
     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 boolean mIsBandSelected;
     37 
     38     public RadioBandButton(Context context) {
     39         super(context);
     40         init(context, null);
     41     }
     42 
     43     public RadioBandButton(Context context, AttributeSet attrs) {
     44         super(context, attrs);
     45         init(context, attrs);
     46     }
     47 
     48     public RadioBandButton(Context context, AttributeSet attrs, int defStyleAttrs) {
     49         super(context, attrs, defStyleAttrs);
     50         init(context, attrs);
     51     }
     52 
     53     public RadioBandButton(Context context, AttributeSet attrs, int defStyleAttrs,
     54             int defStyleRes) {
     55         super(context, attrs, defStyleAttrs, defStyleRes);
     56         init(context, attrs);
     57     }
     58 
     59     /**
     60      * Initializes whether or not this button is initially selected.
     61      */
     62     private void init(Context context, AttributeSet attrs) {
     63         mSelectedBackground = context.getDrawable(R.drawable.manual_tuner_band_bg);
     64         mNormalBackground = context.getDrawable(R.drawable.radio_control_background);
     65 
     66         mSelectedColor = context.getColor(R.color.car_grey_50);
     67         mNormalColor = context.getColor(R.color.manual_tuner_channel_text);
     68 
     69         TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.RadioBandButton);
     70 
     71         try {
     72             setIsBandSelected(ta.getBoolean(R.styleable.RadioBandButton_isBandSelected, false));
     73         } finally {
     74             ta.recycle();
     75         }
     76     }
     77 
     78     /**
     79      * Sets whether or not this button has been selected. This is different from
     80      * {@link #setSelected(boolean)}.
     81      */
     82     public void setIsBandSelected(boolean selected) {
     83         mIsBandSelected = selected;
     84 
     85         if (mIsBandSelected) {
     86             setTextColor(mSelectedColor);
     87             setBackground(mSelectedBackground);
     88         } else {
     89             setTextColor(mNormalColor);
     90             setBackground(mNormalBackground);
     91         }
     92     }
     93 }
     94