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/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.renderscriptintrinsic;
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import android.graphics.Bitmap;
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import android.graphics.Color;
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import android.graphics.Paint;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import android.graphics.drawable.LayerDrawable;
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import android.graphics.drawable.ShapeDrawable;
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import android.graphics.drawable.StateListDrawable;
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import android.graphics.drawable.shapes.RectShape;
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import android.os.Build;
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import android.view.Gravity;
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import android.widget.RadioButton;
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import android.content.Context;
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import android.util.AttributeSet;
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/*
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A button with Thumbnail which extends Radio Button.
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The widget override a background drawable of Radio Button with a StateList Drawable.
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Each state has a LayerDrawable with a Thumbnail image and a Focus rectangle.
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It's using original Radio Buttons text as a label, because LayerDrawable showed some issues with Canvas.drawText().
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*/
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public class ThumbnailRadioButton extends RadioButton {
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public ThumbnailRadioButton(Context context) {
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super(context);
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init();
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}
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public ThumbnailRadioButton(Context context, AttributeSet attrs) {
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super(context, attrs);
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init();
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}
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public ThumbnailRadioButton(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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init();
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}
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private void init() {
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setButtonDrawable(android.R.color.transparent);
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}
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public void setThumbnail(Bitmap bitmap) {
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//Bitmap drawable
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BitmapDrawable bmp = new BitmapDrawable(getResources(), bitmap);
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bmp.setGravity(Gravity.CENTER);
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int strokeWidth = 24;
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//Checked state
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ShapeDrawable rectChecked = new ShapeDrawable(new RectShape());
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rectChecked.getPaint().setColor(0xFFFFFFFF);
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rectChecked.getPaint().setStyle(Paint.Style.STROKE);
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rectChecked.getPaint().setStrokeWidth(strokeWidth);
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rectChecked.setIntrinsicWidth(bitmap.getWidth() + strokeWidth);
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rectChecked.setIntrinsicHeight(bitmap.getHeight() + strokeWidth);
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Drawable drawableArray[] = new Drawable[]{bmp, rectChecked};
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LayerDrawable layerChecked = new LayerDrawable(drawableArray);
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//Unchecked state
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ShapeDrawable rectUnchecked = new ShapeDrawable(new RectShape());
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rectUnchecked.getPaint().setColor(0x0);
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rectUnchecked.getPaint().setStyle(Paint.Style.STROKE);
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rectUnchecked.getPaint().setStrokeWidth(strokeWidth);
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rectUnchecked.setIntrinsicWidth(bitmap.getWidth() + strokeWidth);
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rectUnchecked.setIntrinsicHeight(bitmap.getHeight() + strokeWidth);
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Drawable drawableArray2[] = new Drawable[]{bmp, rectUnchecked};
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LayerDrawable layerUnchecked = new LayerDrawable(drawableArray2);
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//Statelist drawable
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StateListDrawable states = new StateListDrawable();
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states.addState(new int[]{android.R.attr.state_checked},
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layerChecked);
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states.addState(new int[]{},
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layerUnchecked);
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)
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setBackground(states);
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else
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setBackgroundDrawable(states);
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//Offset text to center/bottom of the checkbox
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Paint paint = new Paint();
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paint.setAntiAlias(true);
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paint.setTextSize(getTextSize());
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paint.setTypeface(getTypeface());
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float w = paint.measureText(getText(), 0, getText().length());
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setPadding(getPaddingLeft() + (int) ((bitmap.getWidth() - w) / 2.f + .5f),
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getPaddingTop() + (int) (bitmap.getHeight() * 0.70),
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getPaddingRight(),
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getPaddingBottom());
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setShadowLayer(5, 0, 0, Color.BLACK);
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}
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}