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Re: Dragging mouse question [message #4044 is a reply to message #3964]

Sun, 16 April 1995 00:00

pellet
Messages: 12
Registered: October 1994

Junior Member

D.H.Brooks (cabr69@ccsun.strath.ac.uk) wrote:
: Hello everyone,

: I have written a (very simple) procedure which displays data points on an xy-axis
: and allows you to manipulate them using the left mouse button (i.e. it just uses
: tvrdc,x,y,/down to get the point-within a specified range-and reads the position of
: the next click to place it).At the moment all it does is re-plot every time you move
: a point and although it is satisfactory for my purposes it takes a while to get the plot line looking smooth.Clearly it would be neater if i could drag the points and have the screen continually update the plot so i could see the original line itself moving
: with the cursor.I expect it to be fairly simple but have looked in the IDl manual/reference guide and at the library routines for clues and have found nothing helpful.Does anyone know what commands i should be using? Any help would be
: appreciated.

Well, I'm not sure this is simple enough, but you could draw your graph
in a draw widget with the motion and button event set. Your event handler
could then refresh your plot as you move the mouse around in the plot window.

Hope this helps.

Jeff
pellet@inrs-ener.uquebec.ca

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[Message index]

		Dragging mouse question By: cabr69 on Thu, 13 April 1995 00:00
		Re: Dragging mouse question By: pellet on Sun, 16 April 1995 00:00
		Re: Dragging mouse question By: rouse on Sun, 23 April 1995 00:00

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