Re: NSAttributedString in table data cells

[Matt Rice]

--- Fred Kiefer <fredkiefer@gmx.de> wrote:

> Sašo Kiselkov wrote:
> > Quoting Fred Kiefer <fredkiefer@gmx.de>:
> > 
> >>
> >>Sa?o Kiselkov wrote:
> >>>I found that when my code returns an
> NSAttributedString as the value for a
> >>table
> >>>data cell it doesn't display it as an attributed
> string, but instead by
> >>sending
> >>>it "description" (which obviously isn't right, is
> it?). The problem is in
> >>the
> >>>code of NSCell's "-setObjectValue:" which doesn't
> know about attributed
> >>>strings. I'd recommend adding a test case there
> which, if passed an
> >>>NSAttributedString, invokes [self
> setAttributedStringValue: object];.
> >>>
> >>is this the behaviour on Cocoa? The change you
> suggest seems sensible to
> >>me (and rather simple to implement), but I would
> like to be sure we do
> >>the same as Apple here.
> >>
> > 
> > Even if it didn't exist in Cocoa, it isn't an
> incompatible change where we would
> > solve a particular problem in an incompatible way
> - we'd simply extend the basic
> > concept to be more intelligent and behave more as
> people would expect it - to be
> > able to use attributed and nonattributed strings
> interchangeably in controls.
> > The only difference for an app programmer would
> be: "this one's a plain string
> > and this one's a fancy string".
> > 
> Not sure, if I agree to that. The new behaviour may
> seem sensible to you
> and me, but others may rely on the Cocoa behaviour.
> As soon as I can get
> hold of Mac, I will try to found out, how it behaves
> here.

i believe this has been discussed multiple times in
the past..

GNUstep complies with the documented behaviour
it seems that while mac osx may comply with the
documented behaviour, it has some sort of magic
default formatters to format everything (i don't quite
understand this since formatters work with strings and
not objects)... anyhow IMHO the documentation of the
implementation isn't as important what the developer
can expect to happen/be returned when calling a
method, and in that regard their documentation *was*
broken last time i looked at it at least.

i can't actually figure out how to make
-hasValidObjectValue return NO on a mac :)

so this issue doesn't seem to be limited to attributed
strings...

attached test program, and below is output...
matt
(make -f Makefile on a mac)


GNUstep: 

2005-07-21 18:37:02.000 cellTest[11056]
-objectValue=(nil) KindOf=(nil) formatter=(nil)
hasValidObjectValue=NO
2005-07-21 18:37:02.000 cellTest[11056] NSAnyType
2005-07-21 18:37:02.000 cellTest[11056]
-objectValue=(nil) KindOf=(nil) formatter=(nil)
hasValidObjectValue=NO
2005-07-21 18:37:02.000 cellTest[11056] NSAnyType
2005-07-21 18:37:02.000 cellTest[11056]
-objectValue=(nil) KindOf=(nil) formatter=(nil)
hasValidObjectValue=NO
2005-07-21 18:37:02.000 cellTest[11056] NSAnyType
2005-07-21 18:37:02.000 cellTest[11056] 23 23.500000
23.500000
2005-07-21 18:37:02.000 cellTest[11056]
-objectValue=(nil) KindOf=(nil) formatter=(nil)
hasValidObjectValue=NO
2005-07-21 18:37:02.000 cellTest[11056] NSAnyType
2005-07-21 18:37:02.000 cellTest[11056]
-objectValue=(nil) KindOf=(nil) formatter=(nil)
hasValidObjectValue=NO
2005-07-21 18:37:02.000 cellTest[11056] NSAnyType


Mac:


2005-07-21 18:21:35.390 cellTest[4791] -objectValue=55
KindOf=NSCFNumber formatter=(null)
hasValidObjectValue=YES
2005-07-21 18:21:35.391 cellTest[4791] NSAnyType
2005-07-21 18:21:35.392 cellTest[4791]
-objectValue=<Foo: 0x527160> KindOf=Foo
formatter=(null) hasValidObjectValue=YES
2005-07-21 18:21:35.393 cellTest[4791] NSAnyType
2005-07-21 18:21:35.394 cellTest[4791]
-objectValue=23.5 KindOf=NSCFNumber formatter=(null)
hasValidObjectValue=YES
2005-07-21 18:21:35.395 cellTest[4791] NSAnyType
2005-07-21 18:21:35.396 cellTest[4791] 23 23.500000
23.500000
2005-07-21 18:21:35.398 cellTest[4791]
-objectValue=zxcv{} KindOf=NSConcreteAttributedString
formatter=(null) hasValidObjectValue=YES
2005-07-21 18:21:35.399 cellTest[4791] NSAnyType
2005-07-21 18:21:35.400 cellTest[4791]
-objectValue=(null) KindOf=(null) formatter=(null) hasValidObjectValue=YES


                
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cellTest.tar.gz
Description: 2877085026-cellTest.tar.gz