Re: porting from Cocoa help

[Adrian Robert]

On Mar 5, 2006, at 12:38 AM, Anurodh Pokharel wrote:

> Well, it's been exactly since i last posted about porting a cocoa  
> app. I
> tried again today an was actually able to compile everything in
> ProjectCenter with a few changes. The main change on my end was  
> that apple got
> rid of the dock in mail.app so i got rid of it too. That made  
> porting a
> lot easier.
>  The app i am porting is OSXnews  ( http://osxnews.sf.net )
>
> I have a few questions.

Hi,

The app sounds great.  I'll take a couple of the easy questions..

> 1. does  NSAlert exist in gnustep? I had to comment out every instance
> to get it to compile2. I know that @try{} catch does not work in  
> the version of gcc that
> ships with non Darwin systems. How do you guys get around it? I  
> commented
> every instance, but that will limit the stability of the application

I haven't actually looked at ObjC try/catch, but the NS_DURING /  
NS_HANDLER construct provides similar functionality to try/catch in  
Java, used with the NSException class.  (No 'finally' block though.)   
See

http://gnustep.org/resources/documentation/Developer/Base/ 
ProgrammingManual/manual_6.html#SEC80

Possibly you could do something with an #ifdef and some #defines in a  
header to use the same code in Cocoa and GNUstep..


> 3. How do you give the application an icon? does it take icns files?

If you are building with project center and you defined an  
"Application" project, there should be a way to set this through  
project properties.  This gets placed inside the .app bundle when  
built.  The long and short of it is you cannot use an icns, you use a  
fixed-resolution TIFF (perhaps other formats work, I'm not sure) set  
to something like 48x48.


> 4.  NStoolbar uses @selector to specify the action, i had to  
> comment out
> all of that too. How is this done in gnustep.

I'm not sure what the problem is here, @selector works fine in gcc  
ObjC in my experience.  Maybe post an example and the error msg?