[NSMatrix putCell:] raising an exception
[NSMatrix putCell:] raising an exception
- Subject: [NSMatrix putCell:] raising an exception
- From: Stephan Burlot <email@hidden>
- Date: Thu, 18 Nov 2004 00:35:41 +0100
Hi,
I'm stomped by a bizarre bug:
I have a custom class of NSMatrix, which contains subclass of
NSImageCell.
When I want to update a cell, I call a function which allocates a new
cell with the new params and replace the old one with:
// over simplified code
theCell = [pixMatrix cellAtRow:row column:column];
matrixCell = [[CMCell alloc] init] autorelease];
[pixMatrix putCell:matrixCell atRow:row column:column];
with row = 0, column = 0, theCell and matrixCell are not NULL.
I get an exception:
2004-11-18 00:06:08.779 ColorMailer[8807] *** *** Selector
'focusRingType' sent to dealloced instance 0x3e37a0 of class CMCell.
in gbd, 0x3e37a0 is theCell.
This happens ONLY if:
- there is only one cell in the matrix
- and this is called after a modal window (runModalForWindow) was
displayed on screen.
In all other cases, it works.
It seems like *something* needs to be updated in response to the
dismissal of the modal window.
(gdb info below, if needed)
Any ideas?
Thanks,
Stephan
(gdb) info stack
#0 0x90aaaba0 in -[_NSZombie methodSignatureForSelector:] ()
#1 0x909fcea0 in -[NSObject(NSForwardInvocation) forward::] ()
#2 0x90836810 in _objc_msgForward ()
#3 0x92e413a8 in -[NSControl focusRingType] ()
#4 0x92e2e7d0 in -[NSView(NSInternal) _effectiveFocusRingType] ()
#5 0x92e55734 in -[NSView setKeyboardFocusRingNeedsDisplayInRect:] ()
#6 0x92f0077c in -[NSMatrix _setNeedsDisplayInRow:column:] ()
#7 0x92e95b44 in -[NSMatrix updateCell:] ()
#8 0x92eda008 in -[NSMatrix putCell:atRow:column:] ()
#9 0x004b35f8 in -[CMController updateCell:withPhoto:] (self=0x54d520,
_cmd=0x4b8e98, theCell=0x5e3cf0, photo=0x511e60) at
/Users/stephan/develop/cocoa/ColorMailer/sources/CMController.m:660
#10 0x004b2b40 in -[CMController showCroppingPanel:] (self=0x54d520,
_cmd=0x4b8f30, sender=0x54d520) at
/Users/stephan/develop/cocoa/ColorMailer/sources/CMController.m:469
#11 0x004b36dc in -[CMController cropAfterDoubleClick] (self=0x54d520,
_cmd=0x4b8e80) at
/Users/stephan/develop/cocoa/ColorMailer/sources/CMController.m:677
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