[news.eclipse.platform.swt] Re: lightweight Composite?

[Paul Singleton <paul@xxxxxxxx>]

Sunil Kamath wrote:
> "Paul Singleton" <paul@xxxxxxxx> wrote in message 
> news:ddndvk$7is$1@xxxxxxxxxxxxxxxxxxx
>
> > I want to represent some structured data with a
> > hierarchy of Composites, using different colours,
> > border, fonts etc. to represent different types
> > of node.
> >
> > I have this working in another system (SWI-Prolog's
> > XPCE) and want to port it to SWT, using SWT facilities
> > for layouts, DnD, selection, context menus etc.
> >
> > But I'm worried about the feasibility of having
> > perhaps many thousands of Composites - will users
> > run out of graphics handles or whatever?
> >
> > Would it be arduous to emulate a Composite with a Draw2D
> > Figure?  Ideally I'd like to be able to embed real SWT
> > controls, but if not, it would still be useful...

> Check out the VE framework for drawing SWT widgets using GEF.

OK I've checked it out: VE apparently creates the entire
widget hierarchy offscreen, screengrabs and copies
their pixels onto its own canvas and then implements
its own editing operations.

But I'm not sure how this helps me implement lightweight
controls with SWT event handling...

Paul Singleton