How to scroll an image

Question

I wonder how to put an image into a JScrollPane for my photo searching application. It would also be good if the image can be scaled. I tried to use a JLabel and JPanel but for some reason it displays wierd and even though it has scrollbars it wants to be full size.

Answer 1

I just put a JLabel with the image as the icon and put in in a JScrollPane and it worked. The only difference is that before I used BoxLayout and now I use MigLayout, it probably forces the scrollpane to the correct size.
I am using my ImageWrapper class for the image wich has a BufferedImage in it and can do drawing methods and create copies of itself in various java image objects. The problem is that the scale method in ImageWrapper does not appear to be working so I cannot zoom the image.
Here is just the part of my PhotoFinderGUI class that displays the image:
public class PhotoFinderGUI {
     public static void main(String[] args) {
          new PhotoFinderGUI();
     private JLabel imagePreview = new JLabel();
     public PhotoFinderGUI() {
          JFrame frame = new JFrame("Photo Finder");
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          JPanel mainPanel = new JPanel();
          mainPanel.setLayout(new MigLayout());
          frame.add(mainPanel);
          ImageWrapper img = new ImageWrapper("test-image.jpg");
          img.scale(0.5, 0.5);
          imagePreview.setIcon(img.getImageIcon());
          mainPanel.add(new JScrollPane(imagePreview, ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS), "dock center");
          frame.pack();
          frame.setVisible(true);
}And just the code from ImageWrapper class that deals with init and scaling:
class ImageWrapper {
     private BufferedImage image = null;
     private Graphics2D g = null;
     public ImageWrapper(String filename) {
          Image temp = new ImageIcon(filename).getImage();
          image = new BufferedImage(temp.getWidth(null), temp.getHeight(null), BufferedImage.TYPE_4BYTE_ABGR);
          g = (Graphics2D) image.createGraphics();
          g.drawImage(temp, 0, 0, null);
     public void resize(int w, int h) {
          double wScale, hScale;
          wScale = w / image.getWidth();
          hScale = h / image.getHeight();
          g.scale(wScale, hScale);
     public void scale(double h, double v) {
          g.scale(h, v);
     public ImageIcon getImageIcon() {
          return new ImageIcon(image);
}