| Re: GUI strategy advice needed [message #44189 is a reply to message #44185] |
Mon, 23 May 2005 05:34   |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Soren writes:
> I am building a GUI for image display with the following specifications.
> 1) Choice of colormap
> 2) Colorbar
> 3) Window/level setting by mouse drag
> 4) Scalable display
> 5) Print function
> 6) ROI functionality (segmeneted polygon only, multiple ROIs)
>
> I had the first 5 done using direct graphics. (2) and (4) using David
> Fannings colorbar and print routines.
>
> I figured that the ROI function was best implemented using Object graphics
> (OG) as i saw XROI and figured that i then didn't have to worry about a lot
> of the drawing myself.
>
> I was happy with the OG approach until implementing the colorbar using OG.
> It seems the documentaton is erroneus, or at least i cannot seem to control
> the colorbar layout.
>
> 1) The questions in now - should i stick to OG and is there some way to get
> Davids colorbar into an OG window.
> I would like to keep things simple and have all graphics in one window - it
> makes printing easier.
Direct graphics and object graphics are two completely
incompatible graphics sub-systems. You cannot mix and
match in the same graphics window. You could, of course,
use OG colorbars. I've never understood RSI's OG colorbar
either, but I have a couple of my web page that may work
more like what you are expecting. If you go the OG approach,
you will have to modify all the other things you have done, too.
> 2) Am i right that multiple ROIs are best managed using OG?
No, I doubt it. You may be right that ROIs are best
managed by objects, but I've never had any trouble at
all using direct graphics objects to implement all the
functionality you talk about. I do often find the IDLanROI
object useful for computing geometry, etc. But I usually
draw the objects in direct graphics.
I do see the RSI train a'comin', however, and realize that
anyone committed to direct graphics is going to be
run over or left in the dust. What you see is what you
are going to get forever with direct graphics. All the
innovations (i.e., what you are paying your maintenance dollars
for) are going to be in the object graphics realm. Maybe
you would be further ahead to take this as an opportunity
to learn object graphics.
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
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