| Re: Help with plots (newbie) [message #6957] |
Mon, 09 September 1996 00:00 |
Robert Moss
Messages: 74
Registered: February 1996
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Member |
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James Albert wrote:
>
> Hi
> I've been battering my brains for 4 hours now, trying to turn a pixel (any
> pixel) on in a DRAW_WIDGET. This is my first attempt at RSI IDL
>
> This is what I have done
> -created a dialog box with WIDED, containing a DRAW4 widget, mouse events
> enabled, no scroll
> -saved the .WID file, created a .PRO file form WIDED's file menu
> -changed the default case statement for DRAW events to
> BEGIN
> PLOTS, event.x, event.y, /NORMAL, COLOR=13
> print, event.x, ' ', event.y
> -compiled the PRO file from IDL
> -ran the applet
>
> The cursor positions (event.x,y) are printed, but no plotting is done
>
> Can anyone help me?
> --
> James Albert
> james@satlantic.com
I'm not sure you have provided enough information here, but based on
what you have told us, I wonder which color table you are using. If you
are using the default grayscale, you are probably plotting and just
cannot see it because it is too dark. A quick check would be to simply
remove the COLOR=13 bit from your plots command and let it default to
the top of the color table.. then you should get white on black.
There's lots of other things is _could_ be.. if you still have trouble,
post the (simplified) code and I'm sure someone can help you.
--
Robert M. Moss, Ph.D. - mossrm@texaco.com - FAX (713)954-6911
------------------------------------------------------------ -----
This does not necessarily reflect the opinions of Texaco Inc.
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