[Pcgen-trackers] [ pcgen-Bugs-1768839 ] NPE on Table Header Click

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Bugs item #1768839, was opened at 2007-08-06 22:51
Message generated for change (Settings changed) made by karianna
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Category: User Interface
Group: To be fixed For 5.16.0
>Status: Closed
>Resolution: Fixed
Priority: 4
Private: No
Submitted By: James Dempsey (jdempsey)
Assigned to: Nobody/Anonymous (nobody)
Summary: NPE on Table Header Click

Initial Comment:
Whenever a table header is clicked, the following stacktrace is produced.

java.lang.NullPointerException
        at javax.swing.plaf.basic.BasicTableHeaderUI$MouseInputHandler.mouseClic
ked(Unknown Source)
        at java.awt.AWTEventMulticaster.mouseClicked(Unknown Source)
        at java.awt.Component.processMouseEvent(Unknown Source)
        at javax.swing.JComponent.processMouseEvent(Unknown Source)
        at java.awt.Component.processEvent(Unknown Source)
        at java.awt.Container.processEvent(Unknown Source)
        at java.awt.Component.dispatchEventImpl(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Window.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at pcgen.gui.PCGen_Frame1$WaitCursorEventQueue.dispatchEvent(PCGen_Frame
1.java:3465)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)

This occurs in both the 5.12 line and the trunk running under Java 1.6

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Comment By: Martijn Verburg (karianna)
Date: 2008-04-15 13:14

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Still exists in 1.6.0_05, we're unlikely to see 1.6.0_06 before we go
5.14, so moving this to 6.0

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Comment By: Martijn Verburg (karianna)
Date: 2008-02-12 15:39

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Ah, I was looking at the wrong 'close' code on the sun site.  Apparently
this has only been fixed for 1.7, not the 1.6 line (it doesn't appear
they've back ported the fix).

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Comment By: Martijn Verburg (karianna)
Date: 2008-02-12 14:52

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I was unable to get Eclipse to stop at a break point in:

javax.swing.plaf.basic.BasicTableHeaderUI$MouseInputHandler.mouseClicked(Unknown
Source)

The source code there reads:

        public void mouseClicked(MouseEvent e) {
            if (e.getClickCount() % 2 == 1 &&
                    SwingUtilities.isLeftMouseButton(e)){
                JTable table = header.getTable();
                RowSorter sorter = table.getRowSorter();
                if (sorter != null) {
                    int columnIndex = header.columnAtPoint(e.getPoint());
                    if (columnIndex != -1) {
                        columnIndex = table.convertColumnIndexToModel(
                                            columnIndex);
                        sorter.toggleSortOrder(columnIndex);
                    }
                }
            }
        }

I analysed the event at pcgen.gui.PCGen_Frame1 and saw that the event.x
event.y and event.clickCount were all not null, so it's unlikely (unless
overridden) that it those values that are causing the problem.

If anyone is able to get the JDK to stop in debug it would go a long way
to resolving this. - K

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Comment By: Martijn Verburg (karianna)
Date: 2008-02-12 14:10

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This is still occurring with latest alpha and JDK 1.6.0_03, I'm
downloading the JDK source to see if I can see what line it's breaking on
in the JDK itself. - K

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Comment By: Martijn Verburg (karianna)
Date: 2008-02-11 14:52

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I have JDK1.6.0_04 installed, I'll re-test - K

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Comment By: James Dempsey (jdempsey)
Date: 2007-08-07 10:04

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I have hidden the error in 5.12.1 (unless debug mode is turned on) as the
functionality still works. It could be related to
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6523638

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Comment By: Martijn Verburg (karianna)
Date: 2007-08-07 07:40

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James does this need to be patched for the 5.12.1 release?

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