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List:       koffice-devel
Subject:    Re: [Uml-devel] Re: karbon/umbrello
From:       rwlbuis () xs4all ! nl
Date:       2003-05-28 8:14:38
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Hi,

>> Mabe I misunderstand something, but if you decouple KCanvasElement from
>> the
>> actual renderer, you have to
>> make the document classes (KCanvasDocument / VDocument) a more complex
>> class hierarchy than I thought.
>> My idea was to make KCanvasDocument itself a rather "intelligent" class,
>> at
>> least it could handle rendering by calling the appropriate rendering
>> methods from its canvas elements. Because the document knows enough
>> about
>> its elements, it could handle things like optimized rendering (drawing
>> only
>> the parts which are afected from the latest changes.
>> I your proposal you seem to have to implement this functionality in
>> children of KCanasDocument, i.e. in KarbonDocument, UmbrelloDocument,
>> KiioDocument, separately?
>
> these aren't issues we should be worried about right now. my primary
> concern
> is getting kpainter and opal in line. so i have somewhere to go on my
> umbrello work. i figure if i can have a good object hierarchy for drawing
> and
> a good rendering surface/api, then the canvas will be easy.

I understand that, its good you see the higher level picture, because I
sometimes surely dont see it :)
BTW speaking of canvas, maybe we should take a look at
http://wxart2d.sourceforge.net/ for canvas ideas.
Cheers,

Rob.

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