blt graph element element - add points to a line
- From: tobyboy@xxxxxxxxxxxxxxxx
- Date: Fri, 30 May 2008 09:12:20 -0700 (PDT)
Hello,
I'm already trying since a few hours to simple add point, which I
first defined by pen how they should look like to a graph. I
encountered two problems.
1) I'm not sure about the correct parameter arguments "-weight"
seems to expect Integers, but on the below described document they use
"y"?
2) when I'm trying to explicitly pass the x,y coordinates I get
"float value expected" exception
My code looks like the following and I stole it from
http://www.ing.iac.es/~docs/external/tcl/BLT/handouts.pdf ;)
package require Tk
package require BLT
# prepare graph and data
set ::X [ blt::vector #auto ]
$::X seq 0 15 1
set data1 [ blt::vector #auto ]
$data1 set "0.1 2.0 3.3 4.0 4.3 2.4 6.8 5.0 4.6 3.0 2.0 2.0 3.0 3.2
4.0"
set g [blt::graph .g]
$g element create line1 -xdata $::X -ydata $data1 -symbol none -
color blue
pack $g
# add some point at position 2.0 3.3
set x 2.0
set y 3.3
$g pen create pen1 -color red -symbol circle -outline black
$g element configure line1 -weights y -styles { {pen1 $x $y} }
Regards,
Toby
.
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