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From: Don Porter on 31 Aug 2006 13:34
antred wrote:
> Okay, I'm working around my last prolblem by using a Tcl_Eval call to
> source auto.tcl as well and it works. Now I have a new problem.
>
> The following sample is supposed to display a window saying "hello
> world":
>
> label .hello -text "Hello World"
> pack .hello
>
> Unfortunately it does not. The interpreter executes the commands and
> then ends. No window is ever shown. =(

Your program is probably failing to start an event loop.

Can you go back several steps and just consider dynamically
loading Tk in the usual way with

package require Tk

?
From: David Gravereaux on 1 Sep 2006 14:53
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antred wrote:

> 1) call Tcl_CreateInterp()
> 2) Tcl_FindExecutable()
> 3) Tcl_Init()
> 4) Tk_Init()
> 5) done ??
> 6) Tcl_Eval( whatever_script_the_user_is_running )

7) churn the event loop until asked to exit.

I have more to say, but I'm off to "make the donuts" right now.

- --
David Gravereaux <davygrvy(a)pobox.com>
[species:human; planet:earth,milkyway(western spiral arm),alpha sector]

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From: antred on 26 Sep 2006 05:00
Hello guys,

First off, thanks for your replies. With your help, I've solved most
(well, some) of the problems I've mentioned and I now almost have this
thing running. Just one final problem remains.

David Gravereaux wrote:
>
> 7) churn the event loop until asked to exit.
>

Do you have any idea how I would go about this? Previously, my MFC
application went about processing a Tcl script by passing the pathname
of the script to Tcl_EvalFile() ... which won't return until the script
is done. To fire up the event loop of Tk, I'd have to call
Tk_MainLoop() ... which never returns until the user closes the last Tk
window.

I guess the problem is that I'm essentially trying to combine a
sequential, synchronous execution mechanism (Tcl_EvalFile()) with an
event drive execution mechanism (Tk_MainLoop()) ... and I have no idea
how to do it. Perhaps it isn't even possible in the way I've dreamed it
up. =(

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