Re: [gnomemm] Overriding the draw_background signal from Gnome::Canvas::Canvas

["r ve" <kaas_10 hotmail com>]

> > Quote: Ole Laursen
> >
> >
> > I think you meant
> >
> >  pCanvas->signal_draw_background()
> >     .connect(SigC::slot(<mainwindowref>, 
> > &MainWindow::on_draw_background));
> >
> > where <mainwindowref> is probably *this if you're inside a member
> > function of MainWindow. The slot will then call the on_draw_background
> > member function of the reference.
> >
> > If you want to transfer the canvas pointer, I suggest you store it
> > elsewhere in MainWindow (although it is possible to transfer it with
> > the binding mechanism).

Thanks, that's indeed what I meant and it works perfectly now.
(and I feel ashamed for making such a stupid mistake.. :)

Anyway, altough it does work now, the drawing routines do not work correctly 
in some way..

When resizing the view with the canvas in it, or when dragging another 
window on top of it flashes all the time (only with a black color) like 
shown in the following screenshot (taken after doing a resize, the black 
cube is not an item, it's drawn randomly):
http://home.quicknet.nl/qn/prive/rm.vaneijbergen/canvas.png

Setting a clipping rectangle doesn't help and the checkered pattern doesn't 
show up at all (drawn using that render_background signal/method - the white 
rectangle + orange outline is a canvas item) when using the anti aliased 
canvas..

I'm draing the cubes from x,y to width,height (arguments from the 
draw_background method).
When I'm drawing them from 0,0 I don't see any random black pieces, but I do 
see random checkered pieces instead :)

Well, I'm probably doing something dumb again but I can't figure this one 
out either :/
I guess I'll need some sleep before I start seeing what's wrong with it.. 
(it's 3:20am, not a good time to code.. altough I'm sure many people will 
disagree ;)

Thanks,
Rich


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