Home | History | Annotate | Download | only in renderscriptintrinsic 
      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.example.android.renderscriptintrinsic;
     18 
     19 import android.content.Context;
     20 import android.graphics.Bitmap;
     21 import android.graphics.Color;
     22 import android.graphics.Paint;
     23 import android.graphics.drawable.BitmapDrawable;
     24 import android.graphics.drawable.Drawable;
     25 import android.graphics.drawable.LayerDrawable;
     26 import android.graphics.drawable.ShapeDrawable;
     27 import android.graphics.drawable.StateListDrawable;
     28 import android.graphics.drawable.shapes.RectShape;
     29 import android.os.Build;
     30 import android.util.AttributeSet;
     31 import android.view.Gravity;
     32 import android.widget.RadioButton;
     33 
     34 /**
     35  * A button with Thumbnail which extends Radio Button.
     36  *
     37  * <p>The widget override a background drawable of Radio Button with a StateList Drawable. Each
     38  * state has a LayerDrawable with a Thumbnail image and a Focus rectangle. It's using original
     39  * Radio Buttons text as a label, because LayerDrawable showed some issues with
     40  * Canvas.drawText().</p>
     41  */
     42 public class ThumbnailRadioButton extends RadioButton {
     43     public ThumbnailRadioButton(Context context) {
     44         super(context);
     45         init();
     46     }
     47 
     48     public ThumbnailRadioButton(Context context, AttributeSet attrs) {
     49         super(context, attrs);
     50         init();
     51     }
     52 
     53     public ThumbnailRadioButton(Context context, AttributeSet attrs, int defStyle) {
     54         super(context, attrs, defStyle);
     55         init();
     56     }
     57 
     58     private void init() {
     59         setButtonDrawable(android.R.color.transparent);
     60     }
     61 
     62     public void setThumbnail(Bitmap bitmap) {
     63         // Bitmap drawable
     64         BitmapDrawable bmp = new BitmapDrawable(getResources(), bitmap);
     65         bmp.setGravity(Gravity.CENTER);
     66 
     67         int strokeWidth = 24;
     68         // Checked state
     69         ShapeDrawable rectChecked = new ShapeDrawable(new RectShape());
     70         rectChecked.getPaint().setColor(0xFFFFFFFF);
     71         rectChecked.getPaint().setStyle(Paint.Style.STROKE);
     72         rectChecked.getPaint().setStrokeWidth(strokeWidth);
     73         rectChecked.setIntrinsicWidth(bitmap.getWidth() + strokeWidth);
     74         rectChecked.setIntrinsicHeight(bitmap.getHeight() + strokeWidth);
     75         Drawable drawableArray[] = new Drawable[]{bmp, rectChecked};
     76         LayerDrawable layerChecked = new LayerDrawable(drawableArray);
     77 
     78         // Unchecked state
     79         ShapeDrawable rectUnchecked = new ShapeDrawable(new RectShape());
     80         rectUnchecked.getPaint().setColor(0x0);
     81         rectUnchecked.getPaint().setStyle(Paint.Style.STROKE);
     82         rectUnchecked.getPaint().setStrokeWidth(strokeWidth);
     83         rectUnchecked.setIntrinsicWidth(bitmap.getWidth() + strokeWidth);
     84         rectUnchecked.setIntrinsicHeight(bitmap.getHeight() + strokeWidth);
     85         Drawable drawableArray2[] = new Drawable[]{bmp, rectUnchecked};
     86         LayerDrawable layerUnchecked = new LayerDrawable(drawableArray2);
     87 
     88         // StateList drawable
     89         StateListDrawable states = new StateListDrawable();
     90         states.addState(new int[]{android.R.attr.state_checked},
     91                 layerChecked);
     92         states.addState(new int[]{},
     93                 layerUnchecked);
     94 
     95         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
     96             setBackground(states);
     97         } else {
     98             //noinspection deprecation
     99             setBackgroundDrawable(states);
    100         }
    101 
    102         //Offset text to center/bottom of the checkbox
    103         Paint paint = new Paint();
    104         paint.setAntiAlias(true);
    105         paint.setTextSize(getTextSize());
    106         paint.setTypeface(getTypeface());
    107         float w = paint.measureText(getText(), 0, getText().length());
    108         setPadding(getPaddingLeft() + (int) ((bitmap.getWidth() - w) / 2.f + .5f),
    109                 getPaddingTop() + (int) (bitmap.getHeight() * 0.70),
    110                 getPaddingRight(),
    111                 getPaddingBottom());
    112 
    113         setShadowLayer(5, 0, 0, Color.BLACK);
    114     }
    115 }
    116