Re: [Fxruby-users] subclassing FXColor

[meinrad r. <mei...@gm...>]

Lyle Johnson wrote:
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> 
> On Jan 30, 2004, at 5:29 PM, meinrad recheis wrote:
> 
>> id like to subclass FXColor to add some more functionality. like this:
>>
>> class Color < Fox::FXColor
>> def initialize r, g, b
>> end
>> end
>>
>> but i don't know how to subclass Bignum (that is what FXRGB returns ...)
>> how could i do this to integrate with fxruby?
> 
> 
> Fox::FXColor should really be a Ruby module and not a class; you can't 
> create instances of it and use them in any meaningful way. And as you 
> already noted, we already have a way to construct color values from the 
> red, green and blue (and optionally alpha) components, e.g.
> 
>     color = Fox.FXRGB(r, g, b)
> 
> or
> 
>     color_with_some_alpha = Fox.FXRGBA(r, g, b, a)
> 
> It's not clear what advantage a full-blown FXColor class would offer.
[...]

it is the OO-paradigma that gives many advantages by encapsulating data 
(the color value) and methods that operate on that data (FXRGB, 
FXREDVALUE, etc ...) in an object!

i now see that FXRuby expects bignum where FXColor is stated, so the 
question is how to subclass bignum (and that does not belong to this list).

thanks anyways,
meinrad