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+--- Thread: Python plug-in error when no image (/Thread-Python-plug-in-error-when-no-image)
Python plug-in error when no image - gasMask - 02-04-2024
Hi guys,
So I'm on the road to develop a plug-in for GIMP 2.99.16, but I've just started out. I am taking baby steps and ran into this error at the get-go.
What I want to achieve:
I want the plug-in menu item to be enabled when there is no image opened.
What I changed:
procedure.set_image_types('*') <- Works.
to:
procedure.set_image_types('') # <- Broken.
What happens is that the menu item becomes enabled, but when I start the plug-in, I get an error:
"Procedure 'jb-plug-in-first-try' has been called with an invalid ID for argument 'image'. Most likely a plug-in is trying to work on an image that doesn't exist any longer."
I am using the code found at:
plug-in tutorial
This code doesn't reference an image.
Code:
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import sys
import gi
gi.require_version('Gimp', '3.0')
gi.require_version('GimpUi', '3.0')
from gi.repository import Gimp
from gi.repository import GLib
class MyFirstPlugin (Gimp.PlugIn):
def do_query_procedures(self):
return [ "jb-plug-in-first-try" ]
def do_set_i18n (self, name):
return False
def do_create_procedure(self, name):
procedure = Gimp.ImageProcedure.new(
self,
name,
Gimp.PDBProcType.PLUGIN,
self.run,
None
)
# Requires no image, ''.
# procedure.set_image_types('*') <- Works.
procedure.set_image_types('') # <- Broken.
procedure.set_menu_label("My first Python plug-in")
procedure.add_menu_path('<Image>/Filters/Tutorial/')
procedure.set_documentation(
"My first Python plug-in tryout",
"My first Python 3 plug-in for GIMP 3",
name
)
procedure.set_attribution("Your name", "Your name", "2024")
return procedure
def run(self, procedure, *arg):
Gimp.message("Hello world!")
# do what you want to do, then, in case of success, return:
return procedure.new_return_values(
Gimp.PDBStatusType.SUCCESS, GLib.Error()
)
Gimp.main(MyFirstPlugin.__gtype__, sys.argv)On another matter, is there a way to refresh the plug-in, as in have GIMP reload it, so that I can edit code and not have to restart GIMP?
Thank you all for your attention,
Charles
RE: Python plug-in error when no image - nelo - 02-04-2024
You don't have to reload or restart, unless you change stuff in what formerly was the registration.
To start without an image check this answer here:
https://discourse.gnome.org/t/gimp-2-99-how-to-write-python-plugin-that-doesnt-require-an-existing-open-image/12544
A first little tutorial is here:
https://testing.docs.gimp.org/2.99/en/gimp-using-python-plug-in-tutorial.html
RE: Python plug-in error when no image - gasMask - 02-04-2024
Thank you nelo. I found the solution. The correct way is to start the plug-in without an image is to call:
procedure.set_sensitivity_mask(Gimp.ProcedureSensitivityMask.ALWAYS)
Cheers,
Charles