ImageFileViewer.java

package mods.custom_flags.utils.swing;

import mods.custom_flags.utils.Utils;

import javax.imageio.ImageIO;
import javax.swing.*;
import javax.swing.filechooser.FileView;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;

/**
 * Created by Aaron on 4/08/13.
 */
public class ImageFileViewer extends FileView {

    public Icon getIcon(File f) {
        String extention = Utils.getExtention(f.getName());
        if(extention != null){

            if( extention.equalsIgnoreCase("png") ||
                    extention.equalsIgnoreCase("tiff") ||
                    extention.equalsIgnoreCase("tif") ||
                    extention.equalsIgnoreCase("gif") ||
                    extention.equalsIgnoreCase("bmp") ||
                    extention.equalsIgnoreCase("jpeg") ||
                    extention.equalsIgnoreCase("jpg")){
                try{
                    BufferedImage original = ImageIO.read(f);
                    BufferedImage resized = new BufferedImage(16, 16, original.getType());
                    Graphics2D g = resized.createGraphics();
                    g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
                    g.drawImage(original, 0, 0, 16, 16, 0, 0, original.getWidth(), original.getHeight(), null);
                    g.dispose();

                    return new ImageIcon(resized);
                }catch (Exception e){
                    return super.getIcon(f);
                }
            }else{
                return super.getIcon(f);
            }
        }else{
            return super.getIcon(f);
        }
    }
}