Re: [Pyobjc-dev] how to use: NSValue_valueWithBytes_objCType_ ?

[Dirk S. <dir...@ma...>]

On 7-jan-2006, at 0:22, Bob Ippolito wrote:
> On Jan 6, 2006, at 2:11 PM, Dirk Stoop wrote:
>
>> I'm trying to use NSValue_valueWithBytes_objCType_,
>> [...]
>>
>> I can't find anything on using NSValue_valueWithBytes_objCType in  
>> the docs, the list or basically anywhere, maybe someone here can  
>> give me a pointer in the right direction?
>
> You need to use the raw type encodings.  @encode is a compiler  
> feature that isn't available at runtime... there might be a way to  
> introspect the NSRect wrapper in order to get its type encoding,  
> but I don't know it off the top of my head.
>
> The relevant docs are here:
> http://developer.apple.com/documentation/Cocoa/Conceptual/ 
> ObjectiveC/RuntimeOverview/chapter_5_section_6.html
>
> Correct code looks something like this:
> NSValue.valueWithBytes_objCType_(theRect, "{_NSRect={_NSPoint=ff} 
> {_NSSize=ff}}")
>
>
> The "easiest" way to find a type encoding is to compile and run a  
> small Objective-C program like this:
>
> /*
> main.m
> */
> #include <Cocoa/Cocoa.h>
> int main(int argc, char **argv) {
>     printf("%s\n", @encode(NSRect));
>     return 0;
> }
>
> % cc -o main main.m && ./main
> {_NSRect={_NSPoint=ff}{_NSSize=ff}}
>
> -bob
>

Thanks Bob,

I'm beginning to understand how it works now :-)

Dirk