I am having trouble setting a JScrollBar in a a scrollpane to the top

Question

I get the scrollbar, and set it to the up position, and immediately afterwards it sets itself back to the bottom.
The item contained in the scrollpane is a JPanel, and I has lots of stuff in it.
If I do not set it myself, it stays at the bottom...I see it jumping up, but it immediately goes back down.
I set some info that changes the GUI in the contained panel ncluding an image and some text.
This is where the actual item is changed, called by a listener in a JTree.
SetViewObject changes the text and the image of the panel in the scrollpane.
public void doTreeSelectionChanged()
DefaultMutableTreeNode defaultMutableTreeNode
= (DefaultMutableTreeNode)
getLastSelectedPathComponent();
if(!(defaultMutableTreeNode instanceof HMIViewTreeNode))
detailWindow_.setViewObject(null);
summaryWindow_.setViewObject(null);
JScrollPane parent = (JScrollPane)
(summaryWindow_.getParent().getParent());
JScrollBar scrollBar = parent.getVerticalScrollBar();
scrollBar.setValue(0);
return;
HMIViewTreeNode viewTreeNode =
(HMIViewTreeNode)defaultMutableTreeNode;
if(viewTreeNode!=null)
detailWindow_.setViewObject(viewTreeNode.getViewObject());
summaryWindow_.setViewObject(viewTreeNode.getViewObject());
}else
summaryWindow_.setViewObject(null);
detailWindow_.setViewObject(null);
revalidate();
JScrollPane parent = (JScrollPane)
(summaryWindow_.getParent().getParent());
JScrollBar scrollBar = parent.getVerticalScrollBar();
System.out.println("Setting visible amaount to "
+scrollBar.getMaximum());
scrollBar.revalidate();
scrollBar.setVisibleAmount(scrollBar.getMaximum());
scrollBar.setValue(0);
I cannot see what the problem could be...I have also tried doing setVisibleAmount to the size of the scrollbar to no avail.
Please let me know if you have any idea!

Answer 1

Well, I put a bandaid on the idiocy by setting the viewport to not perform scroll rect to visible...I do not need to use that, so I suppose this is acceptable at least for my app.