| Re: IDL for windows :-{ [message #15402 is a reply to message #15401] |
Fri, 14 May 1999 00:00   |
steinhh
Messages: 260
Registered: June 1994
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Senior Member |
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In article <MPG.11a5ce9f12a213179897a2@news.frii.com>
davidf@dfanning.com (David Fanning) writes:
> P.S. Tell me again how IDL is going to know I want
> the colors in *this* window updated, but not the
> colors in *that* window over there? Because one of
> the best features of 24-bit color is that colors
> *don't* change. Which means, of course, that I can
> have 10 images, each displayed with a different color
> table, on the display at the same time and change only
> the one I want to change.
Sure, Dave, from my original post:
> As an extra bonus, it would be *very* nice if one could specify
> more than one such "interactive colormap" - i.e. along the lines
> of:
> window,0 ;; Default window creation, means "use the
> ;; current colormap (let's call it "map1"),
> ;; in interactive mode ("value" backing store)
> tvscl,image1 ;; Display image1 with this color map
> window,1 ;; Create new window, still using map1
> tvscl,image2
> xloadct ;; Manipulate current map, with instant
> ;; update of window 0 and 1 (since they're
> ;; both using the map that's manipulated).
> newmap = obj_new('pseudomap') ;; Create a new (interactive)
> ;; colormap
> window,2,pseudo=newmap ;; Both windows share this new map
> window,3,pseudo=newmap ;;
> :
> xloadct ;; Manipulates current (i.e. "newmap") color table,
> ;; updating window 2 & 3, no effect on 0 and 1.
> wset,0 ;; Now we're switching to a window using map1
> xloadct ;; Manipulate map1 again.. no effect on window
> ;; 2 and 3, but instant update of 0 and 1.
> In the case of an 8-bit display, all the color tables would
> probably be identical, with changes to one reflected in all
> windows. Or maybe one could still have different color tables
> internally, and the effective one (the one that's actually
> communicated to the screen hardware) would depend on which window
> was selected/active (wset)?
Simple and efficient, aint it? I've had responses by email
ranging from
"You've pretty much expressed what I want for next Christmas"
to
"One word...ditto!"
I cannot see that this will involve such a great deal of
hassle compared to the ability to have RETAIN=2 for graphics
windows....
Regards,
Stein Vidar
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