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      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 
     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 
     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 
     64     public void drawIndicator(boolean drawCircle) {
     65         mDrawCircle = drawCircle;
     66     }
     67 
     68     @Override
     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
     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