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Colormaps (a favorite subject!) [message #19448]

Fri, 24 March 2000 00:00

Craig Hamilton
Messages: 28
Registered: December 1996

Junior Member

Hi all:
I've run into a little snag dealing with colormaps and thought I would seek
the advice of the wise ones.

I have an image-viewing program that displays gray-level images.
Works great. I had this idea that I wanted to make some
of settings user-selectable on startup, so I first popped up a window with
some radio buttons in it. One set of radio buttons lets the user select
the number of gray-levels used in the colormap.

The problem is that IDL requires something like:
window,0,colors=numcolors,/pixmap,xsize=10,ysize=10
wdelete,0

to initially setup the colormap, prior to any windows being created.

But, I have already created my popup window. So it seems to me
I'm in a catch-22: I have to specify the number of colors before I
create my popup window, but I don't know the number of desired
colors until after I have created my popup window.

My popup doesn't create any draw widgets, if that matters.

So, the question is:
Is it possible to use a popup window to get from the user the number
of desired gray-levels?

I hope this is clear. Any tips most appreciated.

Craig

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[Message index]

		Colormaps (a favorite subject!) By: Craig Hamilton on Fri, 24 March 2000 00:00
		Re: Colormaps (a favorite subject!) By: davidf on Tue, 28 March 2000 00:00
		Re: Colormaps (a favorite subject!) By: Liam E. Gumley on Tue, 28 March 2000 00:00
		Re: Colormaps (a favorite subject!) By: kbowman on Tue, 28 March 2000 00:00
		Re: Colormaps (a favorite subject!) By: John-David T. Smith on Tue, 28 March 2000 00:00
		Re: Colormaps (a favorite subject!) By: Alex Schuster on Tue, 28 March 2000 00:00
		Re: Colormaps (a favorite subject!) By: Liam E. Gumley on Tue, 28 March 2000 00:00
		Re: Colormaps (a favorite subject!) By: Phillip David on Tue, 06 June 2000 00:00

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