[commit-cp] [bugs #11917] [Swing] plaf uninstall should not try to remove UI items

[Thomas Zander]

URL:
  <http://savannah.gnu.org/bugs/?func=detailitem&item_id=11917>

                 Summary: [Swing] plaf  uninstall should not try to remove UI
items
                 Project: classpath
            Submitted by: zander
            Submitted on: Thu 02/10/2005 at 12:08
                Category: classpath
                Severity: 5 - Average
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
        Platform Version: None

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Details:

I get a nullpointerexception in my class that extends JTable and implements
setFont() to do something with that font since the uninstall from the plaf
does a setFont(null).



Exception during event dispatch:

java.lang.NullPointerException

   at uic.widgets.UICTable.setFont (UICTable.java:253)

   at javax.swing.plaf.basic.BasicTableUI.uninstallDefaults
(BasicTableUI.java:212)

   at javax.swing.plaf.basic.BasicTableUI.uninstallUI
(BasicTableUI.java:246)

   at javax.swing.JComponent.setUI (JComponent.java:2200)

   at javax.swing.JTable.setUI (JTable.java:1730)

   at javax.swing.JTable.updateUI (JTable.java:1735)

   at javax.swing.SwingUtilities.updateComponentTreeUI
(SwingUtilities.java:614)

   at javax.swing.SwingUtilities.updateComponentTreeUI
(SwingUtilities.java:610)

   at javax.swing.SwingUtilities.updateComponentTreeUI
(SwingUtilities.java:610)

   at javax.swing.SwingUtilities.updateComponentTreeUI
(SwingUtilities.java:610)

   at javax.swing.SwingUtilities.updateComponentTreeUI
(SwingUtilities.java:610)

   at javax.swing.SwingUtilities.updateComponentTreeUI
(SwingUtilities.java:610)

   at javax.swing.SwingUtilities.updateComponentTreeUI
(SwingUtilities.java:610)

   at javax.swing.SwingUtilities.updateComponentTreeUI
(SwingUtilities.java:610)

   at javax.swing.SwingUtilities.updateComponentTreeUI
(SwingUtilities.java:610)



All items that have UIResource equivalents (FontUIResource etc) should not be
set to 'null', but to sane defaults.

Or, in other words, the UI should have defaults (and know what to do with
'null' values), not the widget.






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