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Re: How to know a window id is valid [message #7080 is a reply to message #7072]

Fri, 20 September 1996 00:00

Peter Mason
Messages: 145
Registered: June 1996

Senior Member

On 19 Sep 1996, Gary Fu wrote:
> Is there a command to tell that a window id created by a
> draw window widget is valid for WSET to use ?

I don't know of a neat way to do this. I use the following hack:

function draw_valid,draw
;returns 1 if the draw-widget or plot-window ID in DRAW is valid, else 0
catch,e &if (e ne 0) then return,0
wshow,draw
return,1
end

It works with plot windows and draw widgets (regular and pixmap).
(Use WIDGET_CONTROL,draw_widget_id,GET_VAL=draw to get the draw ID of a draw
WIDGET.)

It has the side-effect of de-iconising the window and bringing it to the
foreground. (Something you might want to do anyway if you're about to plot
to the thing.)

Peter Mason

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[Message index]

		Re: How to know a window id is valid By: davidf on Fri, 20 September 1996 00:00
		Re: How to know a window id is valid By: davidf on Fri, 20 September 1996 00:00
		Re: How to know a window id is valid By: Peter Mason on Fri, 20 September 1996 00:00
		Re: How to know a window id is valid By: thompson on Thu, 19 September 1996 00:00

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