JScrollPane vertical bar is defaulting to the bottom
- From: "Debs" <ickz@xxxxxxxx>
- Date: 31 Aug 2006 01:45:56 -0700
Hi,
I have a JScrollPane for a large panel, when it displays the vertical
bar is at the bottom. I want it at the top - I have various other
JScrollPanes elsewhere that default to the top as expected.
I believe the difference may be that this panel contains JTextAreas,
and I have read that setting the caret position can help. However, with
it having multiple, I'm not sure what to do. I have tried setting the
focus and caret position in the first JTextArea, but this did not work.
Sample code:
=======================================
....
JPanel innerDetailPanel = new JPanel(new GridBagLayout());
innerDetailPanel.setBorder(null);
int gridy=0;
GridBagConstraints detailPanelConstraints = new GridBagConstraints();
detailPanelConstraints.gridx = 0;
detailPanelConstraints.gridy = gridy;
detailPanelConstraints.weightx=0.5;
detailPanelConstraints.fill = GridBagConstraints.HORIZONTAL;
detailPanelConstraints.insets = new Insets(5, 1, 1, 1);
//title
JLabel titleLabel = new JLabel("Title label", JLabel.CENTER);
titleLabel.setBackground(TITLECOLOR);
titleLabel.setOpaque(true);
titleLabel.setFont(TITLEFONT);
innerDetailPanel.add(titleLabel, detailPanelConstraints);
gridy++
for(int i=0;i<names.length; i++) {
detailPanelConstraints.gridx = 0;
detailPanelConstraints.gridy = gridy;
detailPanelConstraints.weightx=0.5;
String name = names[i];
JTextArea nameValue = new JTextArea(name);
nameValue.setLineWrap(true);
nameValue.setEditable(false);
nameValue.setBackground(getContentPane().getBackground());
innerDetailPanel.add(nameValue, detailPanelConstraints);
gridy++;
}
JPanel northAlign = new JPanel(new BorderLayout());
northAlign.add(innerDetailPanel, BorderLayout.NORTH);
JScrollPane locationDetailPanel = new JScrollPane(northAlign,
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
Border compoundBorder = BorderFactory.createCompoundBorder(
new EmptyBorder(5,20,5,20), new LineBorder(Color.DARK_GRAY));
locationDetailPanel.setBorder(new CompoundBorder(compoundBorder, new
EmptyBorder(5,5,5,5)));
....
=======================================
I tried the same code but using JLabel rather than a textarea, and the
scroll bar is at the top as expected.
The reason I'm using the textareas is to ensure text correctly wraps. I
know you can make JLabels wrap using <html> but the labels steal as
much room as they can, rather than just wrapping within the expected
cell space. The JTextAreas correctly display what I want.
Like I said above, I also tried setting the focus and caret position on
the first (top most) JTextArea, but this did not work. I've tried a
few methods for setting the position of the scroll bar, but they do not
work either.
Any suggestions would be much appreciated, thank you.
.
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