Re: subclassing NSBitmapImageRep
Re: subclassing NSBitmapImageRep
- Subject: Re: subclassing NSBitmapImageRep
- From: Patrick Tepesch <email@hidden>
- Date: Wed, 20 Feb 2002 21:17:55 -0500
I did find one way to do this, although I think there must be a more
elegant solution:
+(void)load
{
printf("MyBitmapImageRep load!!!!\n");
[NSImageRep registerImageRepClass:[MyBitmapImageRep class]];
[NSImageRep unregisterImageRepClass:[NSBitmapImageRep class]];
}
This assures that MyBitmapImageRep will always be called, however it
also means I have to check the type of file against the types I want to
handle in all of the image loading functions. If anyone knows a better
solution, I'd be really happy to find it!
Patrick Tepesch
On Wednesday, February 20, 2002, at 12:00 AM, Patrick Tepesch wrote:
I am trying to create a subclass of NSBitmapImageRep to handle reading
16-bit tiff files. To test this, I have overridden the following
methods, and all the methods for creating reps:
+ (NSArray *)imageUnfilteredFileTypes {
static NSArray *types = nil;
printf("MyBitmapImageRep imageUnfilteredFileTypes!!!!\n");
if (!types) types = [[NSArray alloc]
initWithObjects:@"TIF", nil];
return types;
}
+(void)load
{
printf("MyBitmapImageRep load!!!!\n");
[NSImageRep registerImageRepClass:[MyBitmapImageRep class]];
}
Both printf statements execute in my code, and my code is called if I
give it a new type rather than a type already handled by
NSBitmapImageRep. But when the a .TIF image is loaded from NSImage it
still calls NSBitmapImageRep methods, rather than the methods in my
subclass, thus the load continues to fail.
Any suggestions on how to get my subclass methods called before the
NSBitmapImageRep methods?
Thanks,
Patrick Tepesch
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