RatioImageView.java

/*
 * Moments - To the best Instagram client
 * Copyright (C) 2015  XiNGRZ <xxx@oxo.ooo>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program;  if not, see <http://www.gnu.org/licenses/>.
 */

package ooo.oxo.moments.widget;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.ImageView;

public class RatioImageView extends ImageView {

    private int originalWidth;
    private int originalHeight;

    public RatioImageView(Context context) {
        super(context);
    }

    public RatioImageView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public RatioImageView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    public void setOriginalSize(int originalWidth, int originalHeight) {
        this.originalWidth = originalWidth;
        this.originalHeight = originalHeight;
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        if (originalWidth > 0 && originalHeight > 0) {
            float ratio = (float) originalWidth / (float) originalHeight;

            int width = MeasureSpec.getSize(widthMeasureSpec);
            int height = MeasureSpec.getSize(heightMeasureSpec);

            if (width > 0) {
                height = (int) ((float) width / ratio);
            }

            setMeasuredDimension(width, height);
        } else {
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
    }

}