Re: Font constants

[Fred Kiefer]

Fred Kiefer wrote:
> Jesse Ross wrote:
>
> > Perhaps someone can easily answer this question for me. Do we have 
> > font  constants, similar to Mac OS X? As I'm doing a new UI theme, I 
> > want to  make sure I'm using fonts at the appropriate sizes (I know, I 
> > know,  Alex, 12pt Bitstream Vera Sans) in the right places. Here is 
> > Apple's  HIG on the issue:
> >
> > http://developer.apple.com/documentation/UserExperience/Conceptual/ 
> > OSXHIGuidelines/XHIGText/chapter_4_section_2.html
> >
> > Any info or pointers in the right direction would be much appreciated!
>
> As you can see from the document you pointed to, the constants are for 
> Carbon only, which we don't support of course. In Cocoa, and therefore 
> in GNUstep, the methods from the last column should be used. Here a 
> small error must have been made, as some of these methods clearly don't 
> return fonts but font sizes.
> We currently don't support the systemFontSizeForControlSize: method, 
> although it should be very easy to add. If nobody beats me on that, I 
> will add the method next week. Up to then, you could use the methods 
> smallSystemFontSize and systemFontSize.

I started to implement this method, but noticed that I will need to 
include NSCell.h into NSFont.h to see the type NSControlSize. Doing so 
failed because of some complex recursion in the includes. There surely 
is some trick to work around this by moving one include down a few lines 
and a type defintion up (or something like this), but I would like to 
suggest a different solution. NSControlSize and NSControlTint and their 
placement in NSCell and NSColor always looked strange to me. What about 
moving them into some new public header file, perhaps called 
NSAppearance.h? From there it would be easy to include them into any of 
the offical header file where they are needed.
The problem here is of course that we create a new file and have to take 
care that it wont be used for any other cases. Perhaps we better but a 
"private" into the file name?
I would prefer some quick answers here, so that I am able to go ahead 
today. Untill I get them I'll try the statement shifting to see if there 
is a simple solution in there.

Fred