/*
 * Copyright (C) 2011 Make Ramen, LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.makeramen.segmented;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.RadioButton;

public class CenteredRadioImageButton extends RadioButton {

	Drawable image;

	public CenteredRadioImageButton(Context context, AttributeSet attrs) {
		super(context, attrs);
		TypedArray a = context.obtainStyledAttributes(attrs, com.arpith.dmucs.R.styleable.CompoundButton, 0, 0);
		image = a.getDrawable(1);
		setButtonDrawable(android.R.color.transparent);
		a.recycle();
	}

	@Override
	protected void onDraw(Canvas canvas) {
		super.onDraw(canvas);

		if (image != null) {
			image.setState(getDrawableState());

			// scale image to fit inside button

			int imgHeight = image.getIntrinsicHeight();
			int imgWidth = image.getIntrinsicWidth();
			int btnWidth = getWidth();
			int btnHeight = getHeight();
			float scale;

			if (imgWidth <= btnWidth && imgHeight <= btnHeight) {
                scale = 1.0f;
            } else {
                scale = Math.min((float) btnWidth / (float) imgWidth,
                        (float) btnHeight / (float) imgHeight);
            }


			int dx = (int) ((btnWidth - imgWidth * scale) * 0.5f + 0.5f);
            int dy = (int) ((btnHeight - imgHeight * scale) * 0.5f + 0.5f);

			image.setBounds(dx, dy, (int)(dx + imgWidth * scale), (int)(dy + imgHeight * scale));

			image.draw(canvas);
		}
	}
}