Re: TWAPI strangeness
- From: Richard Owlett <rowlett@xxxxxxxxxxxxx>
- Date: Sat, 13 Dec 2008 10:10:46 -0600
Richard Owlett wrote:
Alexandre Ferrieux wrote:
On 13 déc, 14:06, Richard Owlett <rowl...@xxxxxxxxxxxxx> wrote:
My OS is WinXP Pro Service Pack 2
I have Tcl versions 8.4.14.0 and 8.5.2.0 from ActiveState installed.
Goal is to run Gnuplot commands from Tcl (eventually with the
Tcl interpreter packaged with Scilab 4.1.2 [reports "TCL/TK 8.4.15
Final Release"]).
I frequently use "TclTutor 3.0 Beta 2" as test bed for scripts because
its error highliting scheme is helpful.
My script (based on sample in TWAPI documentation) is:
# Send a text string to existing gnuplot window
package require twapi
set title gnuplot
set data "plot 'C:\dataset1.dat' using 1:3 \n"
# Get all windows with that title
set windows [twapi::find_windows -text $title]
if {[llength $windows]} {
set win [lindex $windows 0]
# Set the focus to the window
twapi::set_focus $win
# Feed data in to the input queue
twapi::send_input_text $data} else {
puts "No windows found with title '$title'"
}
This script runs fine when run from TclTutor. Tested with and without
the gnuplot window existing.
It fails when run from Wish85, Tclsh85, Wish84, or Tclsh84.
All 4 react the same.
If no gnuplot window exists, that is correctly reported.
If the gnuplot window does exist, the contents of $data appear in the
Wish/Tclsh window.
*This morning* it runs correctly under Scilab IF the gnuplot window
exists. It [as might be expected] fails silently if the gnuplot window
does not exist. I don't recall it working from Scilab at all *last night* ;/
I'm a Tcl newbie. What perfectly obvious thing am I missing?
TIA
Hmm, looks you were a bit quick to abandon pipes ;-)
*ROFL* !!!
Hey, if a half century younger, I would have been diagnosed as ADHD.
Besides, TWAPI will likely be very useful in another project.
And one learns patience having run CUPL on CORC with 026 input device.
FWIW, after an admittedly longer-than-expected Google session,
You mean I'm not the only one to discover that
[google == " fascinating rabbit trails"]
Could you list the URL's you found useful? TIA
I found
that using gnuplot through pipes on Windows works like a charm..
provided you know which executable to launch !
The key is that the proper exe is "pgnuplot.exe", not wgnuplot_pipes
which is a decoy ;-)
The following works out of the box in an interactive tclsh/wish:
# assume you set up the PATH to see pgnuplot.exe
set ff [open "|pgnuplot" r+]
fconfigure $ff -buffering line
puts $ff "plot sin(x)"
I'll try it.
It works from Wish and Tclsh.
It has problems when trying to use Silab's Tcl/Tk functionality. I believe the problem is proper usage of mixing use of ' ' within " ".
I get a Scilab error.
I suspect I experienced the same thing with my TWAPI runs. Why this morning's run with Scilab worked and last night's didn't. And I've misfiled the relevant Scilab scripts ;<
.
Of course If you want a more "fire-and-forget" behavior (let Tcl
prepare something to display then let gnuplot live alone), use
"pgnuplot -persist".
HTH,
-Alex
But, you didn't answer the question of this thread ;)
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- From: Richard Owlett
- Re: TWAPI strangeness
- From: Alexandre Ferrieux
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