JScrollPane: lock views size in one direction

Question

Hi,
I have a JScrollPane that should use only the vertical scrollbar and a fixed size in horizontal direction. That means when an element inside the scroll panes view is broader as allowed it has to be shrinked down according to the behaviour of its LayoutManager.
I tried to set the preferred size for the JScrollPane itself and its view port but nothing helped. So how can I lock a JScrollPane in one direction so that it shows its standard behaviour only for the other direction?
Oxy
Edited by: Oxy on Oct 23, 2008 2:01 AM

Answer 1

This response is probably way too late to solve your problem but I was looking for an answer to the same question and found this post, so I figure if I answer it here, the next person won't need to search further.
Basically you use Scrollable to do this.
Assuming you're working with a custom panel:
public class MyCustomPanel implements Scrollable {
    public boolean getScrollableTracksViewportWidth() {
        return true;
}If you're not using a custom panel then often it will already implement this method, but you can still override it to force the desired behaviour.
FWIW this can also be used in the direction you do want it to scroll, if you have a background you need to fill the entire scrollable area:
public class MyCustomPanel implements Scrollable {
    public boolean getScrollableTracksViewportHeight() {
        return getParent() instanceof JViewport && getParent().getHeight() > getPreferredSize().height;
}i.e. if the viewport is bigger than what you need to paint, the viewport will stretch your component to fill the rest of the space.