content: /*
   * Copyright (c) 1997 - 2016
   * Actelion Pharmaceuticals Ltd.
   * Gewerbestrasse 16
   * CH-4123 Allschwil, Switzerland
   *
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   * 3. Neither the name of the the copyright holder nor the
   *    names of its contributors may be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
   * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * @author Thomas Sander
   */
  
  package com.actelion.research.gui;
  
  import com.actelion.research.gui.hidpi.HiDPIHelper;
  
  import javax.imageio.ImageIO;
  import javax.swing.*;
  import java.awt.*;
  import java.awt.geom.AffineTransform;
  import java.awt.image.AffineTransformOp;
  import java.awt.image.BufferedImage;
  import java.io.BufferedInputStream;
  
  public class JImagePanelFixedSize extends JPanel {
  	private BufferedImage   mImage;
  
      public JImagePanelFixedSize() {
  		super();
  		}
  
  	/**
  	 * Creates an image panel with the supplied image file name.
  	 * After reading the image, it is automatically UI-scaled (enlarged on high-res screens).
  	 * @param fileName
  	 */
  	public JImagePanelFixedSize(String fileName) {
  		this(fileName, 1.0);
  		}
  
  	/**
  	 * Creates an image panel with the supplied image file name.
  	 * After reading the image, it is automatically UI-scaled (enlarged on high-res screens).
  	 * The provided scale factor does not include UI-scaling and is used if source image
  	 * has a high resolution to allow lossless UI-scaling.
  	 * @param fileName
  	 * @param scale typically smaller than 1.0 for high-res images that shall not loose during UI-scaling
  	 */
      public JImagePanelFixedSize(String fileName, double scale) {
  		super();
  		readAndScaleImage(fileName, scale);
  		}
  
  	/**
  	 * Creates a JImagePanelFixedSize without any scaling.
  	 * If you need UI-scaling, the image has to be scaled in advance.
  	 * @param image
  	 */
  	public JImagePanelFixedSize(BufferedImage image) {
  		super();
  		mImage = image;
  		initializeSize(mImage.getWidth(), mImage.getHeight());
  		}
  
  	private void initializeSize(int width, int height) {
  		Dimension size = new Dimension(width, height);
  		setMinimumSize(size);
  		setMaximumSize(size);
  		setPreferredSize(size);
  		}
  
  	public void setImage(String fileName) {
  		setImage(fileName, 1.0);
  		}
  
  	public void setImage(String fileName, double scale) {
  		readAndScaleImage(fileName, scale);
  		repaint();
  		}
  
  	@Override public void paintComponent(Graphics g) {
  		if (mImage != null)
  			g.drawImage(mImage,0,0, this);
  		}
  
  	private void readAndScaleImage(String fileName, double scale) {
  		try {
  			BufferedInputStream in = new BufferedInputStream(getClass().getResourceAsStream(fileName));
  			mImage = ImageIO.read(in);
  			if (mImage != null) {
  				int width = (int)(scale * HiDPIHelper.scale(mImage.getWidth()));
  				int height = (int)(scale * HiDPIHelper.scale(mImage.getHeight()));
  				mImage = scaleImage(mImage, width, height);
  				initializeSize(width, height);
  				}
  			}
  		catch (Exception e) {}
  		}
  
  	public static BufferedImage scaleImage(BufferedImage image, int width, int height) {
  		if (width == image.getWidth()
  		 && height == image.getHeight())
  			return image;
  
  		AffineTransform scaleTransform = AffineTransform.getScaleInstance(
  				(double)width / image.getWidth(), (double)height / image.getHeight());
  		AffineTransformOp bilinearScaleOp = new AffineTransformOp(scaleTransform, AffineTransformOp.TYPE_BILINEAR);
  		return bilinearScaleOp.filter(image, new BufferedImage(width, height, image.getType()));
  		}
  	}