🚀 go-pugleaf

David Br�nnvall <david@strangnas.mail.telia.com> skrev i
diskussionsgruppsmeddelandet:391aa7d0@dnews...
> What class should I use if I want to display and paint on an image in a
> scrollbox.
>
> regards david

Hej David,

if you're using Swing, you could do something like this:

class ScrollyImage extends JComponent implements Scrollable {
    BufferedImage img=new BufferedImage(1000, 1000,
BufferedImage.TYPE_INT_RGB);

    public Dimension getPreferredSize() {
        return new Dimension(img.getWidth(), img.getHeight());
    }
    public void paintComponent(Graphics g) {
        g.drawImage(img, 0, 0, null);
    }
    public Dimension getPreferredScrollableViewportSize() {
        return new Dimension(img.getWidth()/2, img.getHeight()/2);
    }
    int getScrollableBlockIncrement(Rectangle visibleRect, int orientation,
int direction) {
        return 100;
    }
    boolean getScrollableTracksViewportHeight() { return false; }
    boolean getScrollableTracksViewportWidth() { return false; }
    int getScrollableUnitIncrement(Rectangle visibleRect, int orientation,
int direction) {
        return 10;
    }
}

To draw on the Image, get its Graphics (img.getGraphics()) and execute
drawing command with that.

HTH