Re: [boost] GUI foundations

From: John Torjo (john.lists_at_[hidden])
Date: 2005-10-04 06:23:49

> 
>>I might go further  and add units (maybe defaulting to pixels)
>>
>>typedef gui::rect<px,int> rect 1;
>>typedef gui::rect<pc,double> rect 2;
>>typedef gui:rect<mm,int> rect 3;
> 
> 
> That looks great :)!
> 

I disagree. I think you should stick to only one type (probably float 
for now, and eventually allow overriding it -- but, use this 
consistently throughout the app).

Just think of the many places you'll need to deal with geometry 
(rectangle/point/size), and converting from one type of unit (px to cm, 
cm to in, etc) to another.

And, about usability in code. Why would I want in my program,  both:
gui::rect<pc,double> and gui::rect<pc,int> ?
This IMHO would confuse users of the library.

Best,
John

-- 
John Torjo,    Contributing editor, C/C++ Users Journal
-- "Win32 GUI Generics" -- generics & GUI do mix, after all
-- http://www.torjo.com/win32gui/surfaces.html - Sky's the limit!
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