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List:       koffice-devel
Subject:    Re: kontour & QCanvas
From:       Werner Trobin <trobin () kde ! org>
Date:       2001-07-25 7:06:42
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On Wednesday 25 July 2001 08:53, Nikolas Zimmermann wrote:
> On Wednesday 25 July 2001 08:39, Werner Trobin wrote:
> > On Tuesday 24 July 2001 21:05, Igor Janssen wrote:
> > > hi all!
>
> Hi,
>
> > > I have idea to use QCanvas at kontour.
> > > I think it will be better for speed
> > > anyone know this stuff?
> > > I want discuss this item
> > >
> > > I think QCanvas object will be at KontourDocument object and
> > > QCanvasView at KontourView
> > > I dont know about transformated objects...as I see QCanvas dont support
> > > drawing transformated objects
> >
> > Hi!
> >
> > Last time I checked QCanvas I found two problems which kept me from using
> > it:
> > - It doesn't (didn't?) support zooming at all. IIRC it does now, but last
> >   time I checked a zoomed view behaved really bad performance wise.
> > - Printing isn't easy to get right (as in, nice output for images,...)
> > - If you have a huge "paper" (e.g. A1 or so) the memory consumption is
> > huge - Sometimes they seem to mix double/int which makes it harder to get
> > it behave properly at different zoom levels.
>
> [ ] Yes you can count :)

Hehehe, to my defense I have to say that I wrote that mail half asleep
and before I sent it I just remembered the last two issues ;)

> where do they mix int/double ????

QCanvasItem can be positioned using double coordinates. Some (or nearly
all) of the derived classes use QPointArray, integer coordinates,... which
is not a good idea, IMHO.

Ciao,
Werner
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