Re: [ve-dev] running sweet

[Mark Proctor <mproctor@xxxxxxxxxxxx>]

I'm guessing that veritcal or block cell merging can be done by placing 
a floating composite that covers the 4x4 cells as the rectangle top left 
and bottom right can be calculated - or maybe we only need to set its 
width and height and anchor the top and left. How would this compare GC 
based rendering performance? Any issues?

jxtable is a nice open source jtable implementation, that has some extra 
features like frozen columns:
http://xframe.sourceforge.net/swing/jxtable.html

Mark
Mark Proctor wrote:

> virtual table stuff sounds great.
> With regards to merge I mean if you merge two cells, one above the 
> other, or even a block of 4x4 cells.
>
> Mark
> David J. Orme wrote:
>
> > Mark Proctor wrote:
> >
> > > I've just seen that CompositeTable does implement virtual tables,
> > > although not quite sure how that works - seems to create a new internal
> > > table for each redraw.
> >
> >
> >
> > Nope.  When you build a UI, you create a custom control that extends 
> > Composite.  You drop this into CompositeTable to tell CompositeTable 
> > what your row looks like.  CompositeTable uses reflection to get a 
> > Constructor object (the Star Trek replicator (tm) object) and then 
> > duplicates your row object for as many rows as are visible at a given 
> > time.  Scrolling is implemented by rearranging these Composites.  For 
> > example, to scroll down by a line, CompositeTable does the following:
> >
> > - Move every row object up by 1 row.
> > - Move the top row object to the bottom row position.
> > - Fire a row refresh event to ask the content provider to refresh the 
> > bottom row with new data.
> >
> > So redraws are very efficient.  On Linux/GTK my keyboard can't repeat 
> > enough to cause CompositeTable to get behind, although there are a 
> > few other places where the Linux/GTK implementation is slow enough 
> > that my keyboard autorepeat can out-type it.
> >
> > > Does a Composite per row mean you wont be able to
> > > do vertical merges?
> >
> >
> >
> > Not sure what you mean here?
> >
> > Best,
> >
> > Dave Orme
>
> _______________________________________________
> ve-dev mailing list
> ve-dev@xxxxxxxxxxx
> https://dev.eclipse.org/mailman/listinfo/ve-dev