Re: Obj-C header-file becoming C header-file, & NSImage problem
Re: Obj-C header-file becoming C header-file, & NSImage problem
- Subject: Re: Obj-C header-file becoming C header-file, & NSImage problem
- From: Marcel Weiher <email@hidden>
- Date: Mon, 19 Jul 2004 18:59:29 +0100
typedef struct
{
double t;
id intersectedObject;
}PMIntersectionStruct;
This structure is passed all over the place, and eventually comes back
with
intersectedObject pointing at the lucky object. This had been working
perfectly, until I added PMTypes.c (for doing the vector manipulation
stuff), and included a C function prototype in PMTypes.h. Now, the
compiler
always generates errors for the line 'id intersectedObject' in
PMTypes.h. If
I change this to 'void *intersectedObject', it compiles and I can send
messages just fine, but I need to cast the void* to id in message
sends to
avoid warnings. Its like the H file has been demoted from ObjC to C
and the
compiler doesnt understand 'id' anymore. Is there some other way around
this?
I am pretty sure this has nothing to do with the "type" of the file,
because a header file is a header file, but rather with the context the
file is included into.
My guess is that all the .m files you compile are pulling in
Cocoa/Objective-C headers before they include PMTypes.h, whereas your
PMTypes.c is not doing this. Since you only need the definition of
'id', the following should suffice:
#include <objc/objc.h>
2. I've got an NSImageView, made with an NSImage from a
NSBitmapImageRep,
and a pointer to the bitmap data. If I change the data, the
NSImageView only
updates to show the changes if the window (and view) is resized. How
can I
get the NSImage view to update programmatically? Ive tried display: and
setNeedsDisplay: and various other methods on all the objects without
success :( Upon calling caching methods, I get an
NSImageCacheException.
Just throw away the NSImage and create a new one with the
NSBitmapImageRep in question. Or don't use an NSImageView/NSImage
combo.
Marcel
--
Marcel Weiher Metaobject Software Technologies
email@hidden www.metaobject.com
Metaprogramming for the Graphic Arts. HOM, IDEAs, MetaAd etc.
1d480c25f397c4786386135f8e8938e4
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