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