[news.eclipse.tools.gef] Re: Still struggling with coordinates

[Brad Reynolds <bradleyjames@xxxxxxxxx>]

For some reason I was thinking that there was some universal way to get 
these coordinates but apparently I need to check the figures to see if 
they use local coordinates and then do my thing that way.  That's fine 
and it makes sense.  I just thought that I was misusing something.  I'm 
using this to figure out some bounds in my figures.  I need to be able 
to determine the available space for a cell editor in a custom table.

Thanks for the tip on the help as well.  I had looked in there before 
but hadn't since I grabbed 3.1.1.

Pratik Shah wrote:
> Think of absolute and local (relative) as two different coordinate systems.
> translateToRelative() translates the coordinates to that figure's local
> coordinate system, which may not necessarily be relative to that figure's
> origin (as is the case with ScalableLayeredPane).  In your case, the parent
> and child are in the same coordinate system, which is why
> translateToRelative() does nothing.  To do what you want, you can just
> subtract the parent's location from that of the child's.  What are you using
> this for?
>
> The new GEF help documentation (3.1.1 and later) has a section on
> coordinates that might clear things up for you.
>
> "Brad Reynolds" <bradleyjames@xxxxxxxxx> wrote in message
> news:di9r6f$qdk$1@xxxxxxxxxxxxxxxxxxx
>
> > There's something fundamental that I'm missing and hopefully someone can
> > straighten me out.  I have a figure that contains another figure.  What
> > I want is to be able to get the coordinates of the child figure relative
> > to it's parent's figure.  When I call any of the translate methods the
> > check to useLocalCoordinates() always returns false so it doesn't
> > translate.  How can I translate a figure's bounds to be relative to it's
> > parent?
> >
> > Thanks,
> > Brad