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Do
Guest
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 Posted: Sat Apr 16, 2005 3:44 pm Post subject: LookAndFeel problem |
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Hello,
I have a problem with changing the look and feel while running my java
application: When I try to change the look and feel while runtime,
following exeption occures:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at com.sun.java.swing.plaf.windows.WindowsTableHeaderUI$XPDefaultRenderer.paint(Unknown
Source)
at javax.swing.CellRendererPane.paintComponent(Unknown Source)
at javax.swing.plaf.basic.BasicTableHeaderUI.paintCell(Unknown
Source)
at javax.swing.plaf.basic.BasicTableHeaderUI.paint(Unknown Source)
and so on...
Here is the source code for changing my look and feel:
UIManager.LookAndFeelInfo info = (UIManager.LookAndFeelInfo) rbmi2
.getClientProperty ("lnf name");
try
{
UIManager.setLookAndFeel (info.getClassName ());
SwingUtilities.updateComponentTreeUI (mainWin);
}
catch (Exception e)
{
System.err.println (" unable to set UI "
+ e.getMessage ());
}
Is it a bug, because of the exception in WindowsTableHeader...?
Thanks a lot in advance for answers!
Greets,
Do
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Richard Wheeldon
Guest
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| Posted: Sun Apr 17, 2005 6:53 pm Post subject: Re: LookAndFeel problem |
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Do wrote:
| Quote: | UIManager.LookAndFeelInfo info = (UIManager.LookAndFeelInfo) rbmi2
.getClientProperty ("lnf name");
try
{
UIManager.setLookAndFeel (info.getClassName ());
SwingUtilities.updateComponentTreeUI (mainWin);
|
UIManager is looking for a LookAndFeel class not a LookAndFeelInfo
one. That's possibly the cause of the problem,
Richard
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Do
Guest
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| Posted: Tue Apr 19, 2005 10:17 am Post subject: Re: LookAndFeel problem |
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Richard Wheeldon <richard (AT) rswheeldon (DOT) com> wrote
| Quote: | Do wrote:
UIManager.LookAndFeelInfo info = (UIManager.LookAndFeelInfo) rbmi2
.getClientProperty ("lnf name");
try
{
UIManager.setLookAndFeel (info.getClassName ());
SwingUtilities.updateComponentTreeUI (mainWin);
UIManager is looking for a LookAndFeel class not a LookAndFeelInfo
one. That's possibly the cause of the problem,
Richard
|
Hello Richard,
I use the LookAndFeelInfo for creating a menu to enable the selection
of all installed LookAndFeels. The strange thing is, that sometimes it
works fine, but sometimes, when I start the application in Windows
style and try to change in another style there occures this execption
in the TableHeader (WindowsTableHeaderUI$XPDefaultRenderer). I think
that the problem is not the way I set the look and feel
(UIManager.setLookAndFeel (info.getClassName () ), it must be
somethings else... It works fine, except the exception in the
TableHeader...
Following the source for the menu:
UIManager.LookAndFeelInfo[] lnfs = UIManager
.getInstalledLookAndFeels ();
for (int i = 0; i < lnfs.length; i++)
{
JRadioButtonMenuItem rbmi = new JRadioButtonMenuItem (lnfs[i]
.getName ());
lookFeelMenu.add (rbmi);
rbmi.setSelected (UIManager.getLookAndFeel ().getName ().equals
(
lnfs[i].getName ()));
rbmi.putClientProperty ("lnf name", lnfs[i]);
rbmi.addItemListener (new ItemListener ()
{
public void itemStateChanged (ItemEvent ie)
{
JRadioButtonMenuItem rbmi2 = (JRadioButtonMenuItem) ie
.getSource ();
if (rbmi2.isSelected ())
{
UIManager.LookAndFeelInfo info =
(UIManager.LookAndFeelInfo) rbmi2
.getClientProperty ("lnf name");
try
{
UIManager.setLookAndFeel (info.getClassName ().toString
());
SwingUtilities.updateComponentTreeUI (mainWin);
}
catch (Exception e)
{
System.err.println (e.getMessage ());
}
}
}
});
lnfGroup.add (rbmi);
}
Any suggestions for this problem?
Thanks a lot! Do
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