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Problems using CURSOR [message #5501]

Wed, 17 January 1996 00:00

hahn
Messages: 108
Registered: November 1993

Senior Member

Hi,

My IDL program generates output on a terminal (either X Windows System
or MS Windows) and wants to return 4 coordinate pairs the users
selects. However, the following program waits only once for input and
returns 4 time the same coordinates. The problem occurs with both IDL
version 3.6.1b and 4.0.1 on both Unix and MS Windows, so I guess I
might have overlooked some basic fundamentals using CURSOR.

The following procedure is called after Set_plot, 'x':

pro rd4
;
xr=[0,300] & yr=[-4000,4000]
;
; Some test data
dat = [100,200,-50,-300,-1200,-3000,-2000,0,500,800,3000,2400]
x = IndGen(12)*28

Plot, x, dat, xrange=xr, yrange=yr
;
;Position the cursor at the center of the drawing area
;
tvcrs, 150, 0, /data

Print, 'Enter 4 coordinates by clicking the left mouse key'

xin = FltArr(4) & yin = xin

for i=0,3 do begin
cursor, isx, isy, wait=3
xin(i) = isx
yin(i) = isy
print, isx, isy
endfor
end

What is wrong ?

Norbert Hahn

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[Message index]

		Problems using CURSOR By: hahn on Wed, 17 January 1996 00:00
		Re: Problems using CURSOR By: Ken Knighton on Wed, 17 January 1996 00:00
		Re: Problems using CURSOR By: M.Reuss on Thu, 18 January 1996 00:00

Previous Topic:	writing to 2 "windows" in idl?
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