1 /*
2  * Copyright (C) 2013 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.datetimepicker.date;
18 
19 import android.content.Context;
20 import android.content.res.Resources;
21 import android.graphics.Canvas;
22 import android.graphics.Paint;
23 import android.graphics.Paint.Align;
24 import android.graphics.Paint.Style;
25 import android.util.AttributeSet;
26 import android.widget.TextView;
27 
28 import com.android.datetimepicker.R;
29 
30 /**
31  * A text view which, when pressed or activated, displays a blue circle around the text.
32  */
33 public class TextViewWithCircularIndicator extends TextView {
34 
35     private static final int SELECTED_CIRCLE_ALPHA = 60;
36 
37     Paint mCirclePaint = new Paint();
38 
39     private final int mRadius;
40     private final int mCircleColor;
41     private final String mItemIsSelectedText;
42 
43     private boolean mDrawCircle;
44 
TextViewWithCircularIndicator(Context context, AttributeSet attrs)45     public TextViewWithCircularIndicator(Context context, AttributeSet attrs) {
46         super(context, attrs);
47         Resources res = context.getResources();
48         mCircleColor = res.getColor(R.color.blue);
49         mRadius = res.getDimensionPixelOffset(R.dimen.month_select_circle_radius);
50         mItemIsSelectedText = context.getResources().getString(R.string.item_is_selected);
51 
52         init();
53     }
54 
init()55     private void init() {
56         mCirclePaint.setFakeBoldText(true);
57         mCirclePaint.setAntiAlias(true);
58         mCirclePaint.setColor(mCircleColor);
59         mCirclePaint.setTextAlign(Align.CENTER);
60         mCirclePaint.setStyle(Style.FILL);
61         mCirclePaint.setAlpha(SELECTED_CIRCLE_ALPHA);
62     }
63 
drawIndicator(boolean drawCircle)64     public void drawIndicator(boolean drawCircle) {
65         mDrawCircle = drawCircle;
66     }
67 
68     @Override
onDraw(Canvas canvas)69     public void onDraw(Canvas canvas) {
70         super.onDraw(canvas);
71         if (mDrawCircle) {
72             final int width = getWidth();
73             final int height = getHeight();
74             int radius = Math.min(width, height) / 2;
75             canvas.drawCircle(width / 2, height / 2, radius, mCirclePaint);
76         }
77     }
78 
79     @Override
getContentDescription()80     public CharSequence getContentDescription() {
81         CharSequence itemText = getText();
82         if (mDrawCircle) {
83             return String.format(mItemIsSelectedText, itemText);
84         } else {
85             return itemText;
86         }
87     }
88 }
89