Re: Problems with NSOutlineView in Java?
Re: Problems with NSOutlineView in Java?
- Subject: Re: Problems with NSOutlineView in Java?
- From: Doug Knowles <email@hidden>
- Date: Tue, 26 Jun 2001 23:15:16 -0400
A follow-up on this one:
It was suggested that my DataSource was being garbage collected. I
think I've refuted this: my DataSource now registers itself as a
property change listener with other objects, assuring that there are
references to it. I've also instrumented the finalize() method, which
does not appear to be called.
I'm wondering if I am missing a notification handler or some other
method that is expected by the Objective-C implementation.
One refinement of my observations I can offer: if I implement
selectionShouldChangeInOutlineView() and return false, no failure occurs
(and, of course, there is no response to clicks on items in the view).
If I return true, the SIGxxx occurs right after
selectionShouldChangeInOutlineView() reports that it has been called.
Doug K;
On Friday, June 22, 2001, at 12:14 AM, email@hidden wrote:
I'm trying to implement an NSOutlineView in a Java application; at the
moment, the app fails on the first mouse click onto the NSOutlineView
object. The failure is usually a SIGBUS; when I ran it under gdb to
get the stack trace below, the signal was "EXC_BAD_ACCESS".
I'm mailing the list because I thought I remembered seeing a post on
the the Project Builder list that there are known problems with Java
and NSOutlineView (or perhaps the Java bridge). Is this correct? Is
there a known workaround? Or am I doing something wrong or incomplete?
If this is a known problem, are there release notes I should have known
about?
Thanks in advance...
Doug K;
(gdb) backtrace
#0 0x743e9aa4 in _BRIDGEJavaInfoForObjcClass ()
#1 0x743ea1fc in NSIdToJavaHandle ()
#2 0x743ea4c8 in _BRIDGEConvertObjcArgToJava ()
#3 0x743eeb98 in _BRIDGEMorphObjcArgumentsForJava ()
#4 0x743eee14 in _NSInvokeJavaMethod ()
#5 0x743eb05c in _BRIDGEMethodImp ()
#6 0x70f8ab24 in -[NSOutlineView _dataSourceValueForColumn:row:] ()
#7 0x70f9e0a8 in -[NSTableView mouseDown:] ()
#8 0x70f8e64c in -[NSOutlineView mouseDown:] ()
#9 0x70d85600 in -[NSWindow sendEvent:] ()
#10 0x70d78d50 in -[NSApplication sendEvent:] ()
#11 0x70d7548c in -[NSApplication run] ()
#12 0x70d9799c in NSApplicationMain ()
#13 0x00002e90 in main (argc=1, argv=0xbffffd08) at
main.m:5/Users/dknowles/Projects/selene/SIOAqua/
#14 0x00002db4 in _start ()
#15 0x00002bf4 in start ()
#16 0xbffffdc0 in ?? ()
(gdb)
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