Re: [Rubycocoa-talk] copyWithZone

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Yes, that's true. However the problem is not with the NSCell subclass
(DownloadCell) but with the NSObject subclass (Download) that holds
the values for the cell.

If I don't implement the copyWithZone method it exits with a method
not found error:
2007-08-04 18:15:29.644 HellaNZB[3861] *** -[Download copyWithZone:]:
selector not recognized [self = 0x158c2400]
/Users/eloy/Documents/DEVELOPMENT/RubyCocoa/Nzb/hellanzb/build/Release/HellaNZB.app/Contents/Resources/rb_main.rb:22:in
`NSApplicationMain': NSInvalidArgumentException - *** -[Download
copyWithZone:]: selector not recognized [self = 0x158c2400]
(OSX::OCException)
	from /Users/eloy/Documents/DEVELOPMENT/RubyCocoa/Nzb/hellanzb/build/Release/HellaNZB.app/Contents/Resources/rb_main.rb:22

As you can see the class of the object that it's being called on is
Download which is a NSObject subclass.

Otherwise I will create a small app and see if I can replicate the problem.

Ciao,
Eloy

On 8/4/07, Laurent Sansonetti <lsa...@ap...> wrote:
> copyWithZone: is part of the NSCopying protocol, which NSObject
> doesn't implement but NSCell does.
>
> http://developer.apple.com/documentation/Cocoa/Reference/Foundation/Protocols/NSCopying_Protocol/Reference/Reference.html
>
> Laurent
>
> On Aug 4, 2007, at 6:05 PM, Eloy Duran wrote:
>
> > Hey Lrz,
> >
> > That would have been very nice! :)
> > However unfortunately NSObject doesn't implement copyWithZone...
> >
> >>> foo = OSX::NSObject.alloc.init
> > => #<OSX::NSObject:0x2e00e class='NSObject' id=0x159ac60>
> >>> foo.objc_methods.grep(/zone/i)
> > => ["zone"]
> >
> > Eloy
> >
> > On 8/4/07, Laurent Sansonetti <lsa...@ap...> wrote:
> >> Try:
> >>
> >>   def copyWithZone(zone)
> >>     copy = super_copyWithZone(zone)
> >>     # set your attributes to copy
> >>     # ex:
> >>     #    copy.title = self.title
> >>     return copy
> >>   end
> >>
> >> Laurent
> >>
> >> On Aug 4, 2007, at 5:53 PM, Eloy Duran wrote:
> >>
> >>> Hello,
> >>>
> >>> I'm trying to write my own custom NSCell for a tableview.
> >>> However, the table view tries to call #copyWithZone on my objects,
> >>> which are subclasses of NSObject. So I was trying to create a
> >>> working
> >>> #copyWithZone, but no matter what I do it always crashes
> >>> immediately.
> >>> For instance I have the following, but it doesn't even write to the
> >>> console:
> >>>
> >>> def copyWithZone(zone)
> >>> puts 'COPY!'
> >>> copy = Download.allocWithZone(zone).init
> >>> self.instance_variables.each do |iv|
> >>>   copy.instance_variable_set iv, self.instance_variable_get(iv)
> >>> end
> >>> return copy
> >>> end
> >>>
> >>> Backtrace:
> >>>
> >>> #0  0x90a594c0 in objc_msgSend ()
> >>> #1  0xbfffc21c in ?? ()
> >>> #2  0x0002b850 in ocid_to_rbobj ()
> >>> #3  0x0002df10 in ocdata_to_rbobj ()
> >>> #4  0x0003051a in ovmix_register_ruby_method ()
> >>> #5  0x00031a98 in rbobj_call_ruby ()
> >>> #6  0x00031075 in ovmix_register_ruby_method ()
> >>> #7  0x0002f8b9 in init_ovmix ()
> >>> #8  0x927fa468 in -[NSObject(NSForwardInvocation) forward::] ()
> >>> #9  0x90a5ccc1 in _objc_msgForward ()
> >>> #10 0x932aed02 in -[NSCell _setContents:] ()
> >>> #11 0x932aec95 in -[NSCell setObjectValue:] ()
> >>> #12 0x9353abaa in -[_NSPlaceholderTextFieldPlugin
> >>> showValue:inObject:] ()
> >>> #13 0x93511593 in -[NSValueBinder showValue:inObject:] ()
> >>> #14 0x93510938 in -[NSValueBinder
> >>> _adjustObject:mode:observedController:observedKeyPath:context:editableState:adjustState
> >>> :]
> >>> ()
> >>> #15 0x9353a287 in -[NSValueBinder
> >>> updateTableColumnDataCell:forDisplayAtIndex:] ()
> >>> #16 0x9353a9ef in -[NSTextValueBinder
> >>> updateTableColumnDataCell:forDisplayAtIndex:] ()
> >>> #17 0x9353a1d6 in -[_NSBindingAdaptor
> >>> tableColumn:willDisplayCell:row:] ()
> >>> #18 0x93402a9d in -[NSTableView
> >>> _sendDelegateWillDisplayCell:forColumn:row:] ()
> >>> #19 0x933ea065 in -[NSTableView _drawContentsAtRow:column:clipRect:]
> >>> ()
> >>> #20 0x933e902b in -[NSTableView drawRow:clipRect:] ()
> >>> #21 0x933e67ce in -[NSTableView drawRowIndexes:clipRect:] ()
> >>> #22 0x933e56a4 in -[NSTableView drawRect:] ()
> >>> #23 0x933113b1 in -[NSView _drawRect:clip:] ()
> >>> #24 0x9331040b in -[NSView
> >>> _recursiveDisplayAllDirtyWithLockFocus:visRect:] ()
> >>> #25 0x9330f473 in -[NSView
> >>> _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView
> >>> :]
> >>> ()
> >>> #26 0x93310041 in -[NSView
> >>> _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView
> >>> :]
> >>> ()
> >>> #27 0x93310041 in -[NSView
> >>> _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView
> >>> :]
> >>> ()
> >>> #28 0x93310041 in -[NSView
> >>> _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView
> >>> :]
> >>> ()
> >>> #29 0x93310041 in -[NSView
> >>> _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView
> >>> :]
> >>> ()
> >>> #30 0x9330eb78 in -[NSThemeFrame
> >>> _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView
> >>> :]
> >>> ()
> >>> #31 0x9330e362 in -[NSView
> >>> _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:]
> >>> ()
> >>> #32 0x9330dc8e in -[NSView displayIfNeeded] ()
> >>> #33 0x9330da32 in -[NSWindow displayIfNeeded] ()
> >>> #34 0x9335dd6c in _handleWindowNeedsDisplay ()
> >>> #35 0x9082dd6e in __CFRunLoopDoObservers ()
> >>> #36 0x9082ce10 in CFRunLoopRunSpecific ()
> >>> #37 0x9082cace in CFRunLoopRunInMode ()
> >>> #38 0x92dec8d8 in RunCurrentEventLoopInMode ()
> >>> #39 0x92debfe2 in ReceiveNextEventCommon ()
> >>> #40 0x92debe39 in BlockUntilNextEventMatchingListInMode ()
> >>> #41 0x93292465 in _DPSNextEvent ()
> >>> #42 0x93292056 in -[NSApplication
> >>> nextEventMatchingMask:untilDate:inMode:dequeue:] ()
> >>> #43 0x9328bddb in -[NSApplication run] ()
> >>> #44 0x9327fd2f in NSApplicationMain ()
> >>> #45 0x0003fc0d in ffi_call_SYSV ()
> >>> #46 0x0003fbae in ffi_call ()
> >>> #47 0x0003cfa0 in rb_ffi_dispatch ()
> >>> #48 0x00035ca0 in find_bs_boxed_by_encoding ()
> >>> #49 0x00221e09 in call_cfunc ()
> >>> #50 0x002214f2 in rb_call0 ()
> >>> #51 0x00222489 in rb_call ()
> >>> #52 0x0021c34a in rb_eval ()
> >>> #53 0x00217d9c in eval_node ()
> >>> #54 0x00218369 in ruby_exec_internal ()
> >>> #55 0x002183b3 in ruby_exec ()
> >>> #56 0x002183dd in ruby_run ()
> >>> #57 0x00033474 in RBApplicationMain ()
> >>> #58 0x00002886 in main ()
> >>>
> >>> So does somebody know of a good way of implementing this with
> >>> RubyCocoa?
> >>>
> >>> Cheers,
> >>> Eloy
> >>>
> >>> PS: I'm on svn rev 1983
> >>>
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> >>> Rub...@li...
> >>> https://lists.sourceforge.net/lists/listinfo/rubycocoa-talk
> >>
> >>
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> >>
> >
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