Re: [Denemo-devel] scheme-gtk discussion

[Richard Shann]

On Mon, 2011-05-09 at 11:41 +0200, R. Mattes wrote:
> On Mon, 09 May 2011 10:05:59 +0100, Richard Shann wrote
> 
> > > Hmm - are you refering to gtk-canvas (port of gnome canvas)?
> > Well, no, it was literally what I wrote - another gtk widget, that acted
> > like a GtkDrawingArea but could have buttons etc as children, placed 
> > on the drawing area. 
> 
> Yes, you are describing gtk-canvas: a gtk based drawing area widget that can
> embed other gtk widgets. Pretty much a gtk-only clone of the gnome canvas 
> widget
> which itself is a (bad!) clone of the TCL canvas widget (which you probably
> know :-)
> 
> > It was there in the documentation with the comment
> > that it would be slower. I use the online documentation, so it if it 
> > has really vanished perhaps it was just in some development and got 
> > dropped... But I thought I emailed about it and wrote a proposal on 
> > denemo.org
> 
> Unfortunately gtk-canvas is dead. It was never integrated into gtk core. 
> A promissing successor: GooCanvas (http://live.gnome.org/GooCanvas) - a 
> similar
> gtk widget that can incorporate other gtk widgets 
> (see: http://developer.gnome.org/goocanvas/unstable/GooCanvasWidget.html)

Hmm, well what I was hoping for was something already in gtk a sub-class
of GtkDrawingArea so that the current code would just work (slightly
more slowly) but additional facilities become available. (As you can
guess, this would allow incremental development, the only sort that is
really feasible at the moment).

> 
> > 
> > That looks pretty extensive stuff - Nils and Dan Wilckens have both
> > suggested we adopt a completely new drawing approach, but no-one is
> > available to take it on.
> 
> Any pointer to the discussion? Not that I would have time to reimplement the
> drawing
> engine but I'd like to read about the problems you seen with the current 
> approach.
This was just on the mailing list but after some searching I didn't come
up with anything - however Nils keeps notes on this stuff ...Nils?

Richard





> 
> Cheers, RalfD
>