Re: [Plplot-devel] Bug in tk driver/python interaction

[Maurice L. <mj...@ga...>]

Alan W. Irwin writes:
 > Maurice, this is mostly directed to you.
 > 
 > With the new python interface I am getting the following stack trace from
 > the tk driver when I invoke
 > 
 > ./pythondemos.py -dev tk
 > 
 > bad window path name ".pythondemos.py"
 >   while executing
 > "plframe $w.plwin -relief sunken"
 >   (procedure "plxframe" line 20)
 >   invoked from within
 > "plxframe $w $client_id"
 >   (procedure "plw_create" line 2)
 >   invoked from within
 > "plw_create .pythondemos.py tk"
 >   ("after" script)

There may be *two* errors -- 'bad window path name ".pythondemos.py"' makes me
immediately look at that second "." as the probable culprit, since Tcl/Tk use
.'s to delimit parent-child widget names.  So I bet if that last '.py' were
stripped off, it'd work.

 > With the old python interface I get no such error, but the name of the
 > window (displayed by the desktop environment at the top of the window and
 > also displayed by the tk driver in the second line) are the garbage
 > characters "le" so I suspect the problem has been occurring all along.

No idea, yet.

 > If I do something like
 > 
 > ./x02c -dev tk
 > 
 > The window name is displayed as "x02c".
 > 
 > If I use the fortran front end,
 > 
 > ./x02f
 > 
 > and select the tk device, the window name is displayed as "plclient".
 > 
 > If I use the java front end
 > 
 > java plplot.examples.x02 -dev tk
 > 
 > the window name is displayed as "plclient_1".
 > 
 > I believe there must be some assumptions in the tk driver about what the front
 > end is supposed to supply, and I suspect neither the old or new python
 > front ends have done the job properly.
 > 
 > Maurice, could you have a quick dig around to find out what must be supplied
 > by all front ends so the window name works properly with the tk driver? Once
 > I know that information, I can see what is missing from the python front end
 > (or what is being wrongly supplied [say through some name-clash] that is
 > confusing the tk driver).

The tk driver uses:

/* Initialize top level window */ 
/* Request a variant on pls->program (if set) for the main window name */ 
 
    if (pls->program == NULL) 
        pls->program = "plclient"; 

to set the window name.  pls-program is set by $0 passed to the plargs
facility, unless the caller specifies the PL_PARSE_NOPROGRAM option.
So you should just need to pass argc/argv without having munged it ($0 at
least) to plParseOpts.

-- 
Maurice LeBrun    mj...@ga...
Research Organization for Information Science and Technology of Japan (RIST)