GIMP Version: 2.8.18
Operating System: Windows
OS Version: windows 10
GIMP Experience: Intermediate Level

List any relevant plug-ins or scripts:
own adjusted guides-to-path script

List any ERROR messages you received:
Not an error, but behavior

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Hallo,
Am a beginner in using PyGtk, to write a more comfortable UI for Gimp.

My startpunt is the excellent Arakne guide-lab ...
Now using that script I understood to create tabs, buttons, labels etc. (at beginners level)
and what is nice a pop up message by using gtk.MessageDialog().
All ok so far.

Now my problem:
I created a button to use the plugin guides-to-path, works!
A second button to stroke the just created path using the active_vectors in the
last image, deleting the active_vectors. Works
BUT, the problem, the stroked path becomes only visible AFTER deleting the gkt UI AND clicking once on the image.
What do I miss? Or is it (yet) not possible at all and should I be content as it is now

It sounds like you need to do a gimp-displays-flush, which I guess is pdb.gimp_displays_flush() in the land of Python.

Kevin

Thans Kevin, will try

No, a pdb.gimp_displays_flush() is in the called (other) plugin used adding it too after the call of the other plugin did not change the behavior.

Have now an Info-window to tell a user what to do ...

EDIT:
No all is ok now, was a thinking error the flush command at the right place does the work as is wished ;-)

Peter