DrJava

HI there, I am adding some functionalities to DrJava, which i will submit
later because I am still learning how to do stuff on it.

I have been working on zooming in and zooming out the print preview. I
managed to get it working. however, the preview will go beyond the screen
so i added a scrollpane in order to keep the preview within the window
frame.

I added the scrollpane and when i run it, the scroll pane will keep
scrolling without stopping. I tried several way to fix it but i could not
do it.

the following is the snippet of code that is modifed in previewframe.java

private JScrollPane _previewScroll;

ppc.add(_pagePreview);
JPanel tbCont = new JPanel(new BorderLayout());
JPanel cp = new JPanel(new BorderLayout());
_previewScroll = new JScrollPane(cp);

_previewScroll.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBA
R_AS_NEEDED);

_previewScroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS
_NEEDED);

tbCont.add(_toolBar,BorderLayout.NORTH);
tbCont.add(Box.createVerticalStrut(10),BorderLayout.SOUTH);
tbCont.setBorder(new EmptyBorder(0,0,5,0));

setContentPane(_previewScroll);
cp.setBorder(new EmptyBorder(5,5,5,5));
cp.add(tbCont, BorderLayout.NORTH);
cp.add(ppc, BorderLayout.SOUTH);
addWindowListener(_windowCloseListener);


attached is a screenshot when the pane starts to scroll non stopping

It will be great if you provide me with hints on how to solve this problem

thanks