Re: Screen Based AxisScales

• To: VisAD List <visad@xxxxxxxxxxxxxxxx>
• Subject: Re: Screen Based AxisScales
• From: Don Murray <dmurray@xxxxxxxxxxxxxxxx>
• Date: Thu, 02 Mar 2006 06:56:29 -0700

Just some follow-up on this:

Don Murray wrote:

I'm trying to use the screen based axis scales (see Test42 in
the visad examples) and have run into a couple of things
that are problematic in their use.

- the YAxis gets put too far off to the left that my
label gets cut off the screen when my tick labels are
4 or more chars (e.g. 1000).  This is similar to the
issue described at:

http://www.unidata.ucar.edu/cgi-bin/getfile?file=/content/support/help/MailArchives/visad-list/msg03913.html

but that fix is in the distribution, but did not
completely fix the problem.

A workaround is to set the label size a little smaller.  The
default size is 12, using 10 shows my labels.  Not an optimum
solution, but it works.

- ideally, I'd like the scales to be snapped to the
box's original position such the corner of the two scales'
intersection lines up with the box's lower left corner (
when snapToBox is true).

Positioning of the axes is handled down in DisplayRendererJ3D.
At some point, it would be good to allow the user to set
the offset.

- lastly, I'd like to have my clipping happen at the
axis scale position, not the bounds of the box.

I do this by listenting for projection changes, figuring
out where the scales are located in VisAD space and
then set the clipping bounds accordingly.

Also, I made a couple of improvements to the AxisScale
class in the latest VisAD release:

- grid lines - you can now draw grid lines at the major
tick points by calling setGridLinesVisible(true) on
a particular axis scale.
- labelling both sides - you can now have the label on
both sides of the box by calling setLabelBothSides(true).

Don
*************************************************************
Don Murray                               UCAR Unidata Program
dmurray@xxxxxxxxxxxxxxxx                        P.O. Box 3000
(303) 497-8628                              Boulder, CO 80307
http://www.unidata.ucar.edu/staff/donm
        "Time makes everyone interesting, even YOU!"
*************************************************************

• Follow-Ups:
  • animation
    • From: Omar Bennani

• References:
  • Screen Based AxisScales
    • From: Don Murray