Re: ColorControls and images

[Tennessee James Leeuwenburg <tjl@xxxxxxxxxx>]

Cheers Tom, that fixed it right up! I guessed it might be something like 
that, but I didn't see the changeControl() method, so thanks very much 
for pointing it out.

Cheers,
-T

Tom Rink wrote:
> Hi Tennessee,
>
> I've noticed the same thing.  You'll have to do:
>
> cc.changeControl(true)
> to get this to work.  I'd  have to look more closely
> to say why initGreyWedge doesn't do this.  Perhaps
> someone could comment.  I think the reason it works
> in SatDisplay is that the image data reference is
> added to the display *after* the initGreyWedge call
> so the grey table is picked up on the display transform.
>
> Tom
>
>
> On Mon, 11 Oct 2004 06:23:27 -0500 (CDT)
>  Bill Hibbard <billh@xxxxxxxxxxxxx> wrote:
>
> > Hi Tennessee,
> >
> > > I've got a satellite pic to render which is an image. As such, the only
> > > visual scalarmap I can use is RGB. I want to display it in greyscale,
> > > but when I try to use initGreyWedge, nothing happens. I've got a code
> > > snippet below. When it executes I see the println of "Greyscale" but
> > > then there is no change.
> > >
> > > Would you expect this to work?
> >
> >
> > Yes, since visad/examples/SatDisplay.java uses the same
> > logic. Try running 'jaava SatDisplay' in the visad/examples
> > directory. It will read image and map files from the ftp
> > server at UW, so you may want to modify it to read local
> > files. Please let us know what you find.
> >
> > Cheers,
> > Bill
> >
> > > Code Snippet :
> > >
> > >          if(scalarMap != null) {
> > >              ColorControl cc = (ColorControl) scalarMap.getControl();
> > >
> > >              if(mode == ColorConfigurable.GREYSCALE) {
> > >                  System.out.println("Greyscale");
> > >                  cc.initGreyWedge();
> > >              }
> > >
> > >              if(mode == ColorConfigurable.RGB) {
> > >                  System.out.println("RGB");
> > >                  cc.initHSV();
> > >              }
> > >          }