Painting unused part of a JScrollPane

Question

I have a JTable inside a JScrollPane. The table usually doesn't fill the entire area of the scroll pane (but it can, which is why the scroll pane is bigger than it often needs to be). I want to paint on the part of the scroll pane which does not have table rows on it. I have the following:
legsScroller = new JScrollPane(legsTable)
  public void paintComponent(Graphics g)
    ImageIcon image = <get the image from my images jar file>
    Dimension panelSize = new Dimension(getBounds().width, getBounds().height);
    Dimension imageSize = new Dimension(image.getIconWidth(), image.getIconHeight());
    for (int i = 0; i <= panelSize.width; i += imageSize.width)
      for (int j = 0; j <= panelSize.height; j += imageSize.height)
        g.drawImage(image.getImage(), i, j, null);
legsScroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
legsScroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);When I run it, I can see that the painting is being done, because I see my image in the top right-hand and bottom right-hand corner components (using the nomenclature of the API page on JScrollPane). Also, there is a one-pixel wide strip of my image running down the outside of the vertical scrollbar, and a one-pixel deep strip of it running along the bottom of the horizontal scrollbar.
Whilst it's nice to know the painting is being done, the result is exactly the opposite of what I want! I only want to see my image in the unused part of the scroll pane, that is to say, the part bordered by the bottom of the table, the left of the scroll pane, and the inside edges of the two scroll bars.
Does anyone have any ideas as to how I can get hold of the unused portion of a JScrollPane?

Answer 1

How are you doing the 'tiling'? I hope you're making use of <tt>TexturePaint</tt> and not cluttering up your code with nested loops.Well for the case of the matte border (<tt>MatteBorder</tt>), it does all of the work for me. In the case of the tiling of the <tt>JPanel</tt> or <tt>JViewport</tt>, I would have done it using the code in my original post, which is to say I guess not the way I should have :-[  I didn't know about <tt>TexturePaint</tt>...just had a quick look, yes obviously I would use that now that I know about it :->  Thanks again