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From: APN on 13 Dec 2008 11:21
On Dec 13, 6:06 pm, Richard Owlett <rowl...(a)atlascomm.net> wrote:
> set data "plot 'C:\dataset1.dat' using 1:3 \n"
>

In the above line, you might want to double the \ or use / instead
depending on what gnuplot accepts. A single \ will be treated by Tcl
as an escape sequence and not a directory separator. However, that
error should not cause the text to appear in wish itself, so a couple
of other things to try.

First make sure you are getting the right window. The find_windows
could be returning multiple windows even with the -text option - one
corresponding to the toplevel and one corresponding to the child. Just
to be sure, use
find_windows -text $title -toplevel true
and verify you get back a single window.

Also, it might help if in addition to set_focus, you also call
set_foreground_window. I'm not sure if this is strictly necessary and
I can't tell from the MSDN documentation.

/Ashok
From: Richard Owlett on 13 Dec 2008 11:48
Alexandre Ferrieux wrote:
> On 13 d�c, 15:54, Richard Owlett <rowl...(a)atlascomm.net> wrote:
>
>>Alexandre Ferrieux wrote:
>>
>>>On 13 d�c, 14:06, Richard Owlett <rowl...(a)atlascomm.net> 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
>
> http://www.nabble.com/names-of-gnuplot-Win32-binaries-td20437476.html
>
> by typing "wgnuplot_pipes" in Google Groups search and then sorting by
> date.
>
>
>>>The following works out of the box in an interactive tclsh/wish:
>>
>>I'll try it.
>>But, you didn't answer the question of this thread ;)
>
>
> Yes, because I think that switching to a nonportable method to make
> two open-source, OS-agnostic tools talk together should buy you a room
> number in Alcatraz ;-)
>
> -Alex
>

For better or worse, I'm in a Windows(tm) world and TWAPI seems to be
organized in a way I'm familiar with.
From: Alexandre Ferrieux on 13 Dec 2008 11:55
On 13 déc, 17:48, Richard Owlett <rowl...(a)atlascomm.net> wrote:
>
> For better or worse, I'm in a Windows(tm) world and TWAPI seems to be
> organized in a way I'm familiar with.

Yeah. When the Earth was flat, the sky above was organized in a way
most people were familiar with...

-Alex
From: Richard Owlett on 13 Dec 2008 11:58
APN wrote:

> On Dec 13, 6:06 pm, Richard Owlett <rowl...(a)atlascomm.net> wrote:
>
>>set data "plot 'C:\dataset1.dat' using 1:3 \n"
>>
>
>
> In the above line, you might want to double the \ or use / instead
> depending on what gnuplot accepts. A single \ will be treated by Tcl
> as an escape sequence and not a directory separator. However, that
> error should not cause the text to appear in wish itself, so a couple
> of other things to try.
>
> First make sure you are getting the right window. The find_windows
> could be returning multiple windows even with the -text option - one
> corresponding to the toplevel and one corresponding to the child. Just
> to be sure, use
> find_windows -text $title -toplevel true
> and verify you get back a single window.

That might be related to part of it. [twapi::find_windows -text $title]
appears to be returning two handles. But I tried changing
set win [lindex $windows 0]
to
set win [lindex $windows 1]
to no avail.

>
> Also, it might help if in addition to set_focus, you also call
> set_foreground_window. I'm not sure if this is strictly necessary and
> I can't tell from the MSDN documentation.
>

That also looks promising. There seemed to occasionally be a discrepancy
between apparent window with focus and window in foreground.

But I didn't save enough of my trials to be able to reproduce what I was
doing.

> /Ashok
From: Richard Owlett on 13 Dec 2008 13:40
Richard Owlett wrote:

> APN wrote:
>
>> On Dec 13, 6:06 pm, Richard Owlett <rowl...(a)atlascomm.net> wrote:
>>
>>> set data "plot 'C:\dataset1.dat' using 1:3 \n"
>>>
>>
>>
>> In the above line, you might want to double the \ or use / instead
>> depending on what gnuplot accepts. A single \ will be treated by Tcl
>> as an escape sequence and not a directory separator. However, that
>> error should not cause the text to appear in wish itself, so a couple
>> of other things to try.
>>
>> First make sure you are getting the right window. The find_windows
>> could be returning multiple windows even with the -text option - one
>> corresponding to the toplevel and one corresponding to the child. Just
>> to be sure, use
>> find_windows -text $title -toplevel true
>> and verify you get back a single window.
>
>
> That might be related to part of it. [twapi::find_windows -text $title]
> appears to be returning two handles. But I tried changing
> set win [lindex $windows 0]
> to
> set win [lindex $windows 1]
> to no avail.
>
>>
>> Also, it might help if in addition to set_focus, you also call
>> set_foreground_window. I'm not sure if this is strictly necessary and
>> I can't tell from the MSDN documentation.
>>
>
> That also looks promising. There seemed to occasionally be a discrepancy
> between apparent window with focus and window in foreground.
>
> But I didn't save enough of my trials to be able to reproduce what I was
> doing.
>
>> /Ashok

Both changes a required. *PLUS* another - restore_window
Handles case of the gnuplot window having been minimized.

Tested from Wish85 and Tclsh85.

Now to see if I can make everything work together when called from
Scilab. [Scilab issues, not Tcl]

I can always be trusted to find a new way to crash a system ;)

Thanks for your assistance.


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