bpy.app.handlers.load_post not run on startup file loading after splashscreen #34636

New Issue

Emanuele Gissi · 2013-03-14T10:40:57+01:00

Emanuele Gissi commented

2013-03-14 10:40:57 +01:00

%%%--- Steps for others to reproduce the error ---

Register a load_post handler in a script init.py:

def register():

  bpy.utils.register_module(__name__)
  bpy.app.handlers.load_post.append(load_handler)

@persistent
def load_handler(self):

  print("Run load handler")

Open Blender 2.66 (Linux Xubuntu amd64)
At the splashscreen do not choose any alternative and click elsewhere
The default startup file is loaded, load_post handler is not run.

Note that if I reload the default startup file by the File > New menu, then the load_post handler is correctly run. %%%

%%%--- Steps for others to reproduce the error --- 1) Register a load_post handler in a script __init__.py: def register(): ``` bpy.utils.register_module(__name__) bpy.app.handlers.load_post.append(load_handler) ``` @persistent def load_handler(self): ``` print("Run load handler") ``` 2) Open Blender 2.66 (Linux Xubuntu amd64) 3) At the splashscreen do not choose any alternative and click elsewhere 4) The default startup file is loaded, load_post handler is *not run*. Note that if I reload the default startup file by the File > New menu, then the load_post handler is correctly run. %%%

Emanuele Gissi commented

2013-03-14 10:40:57 +01:00

Changed status to: 'Open'

Brecht Van Lommel commented

2013-03-14 16:49:29 +01:00

%%%When the splash screen shows, the startup.blend has already been loaded, clicking next to it does not cause it any file load, it just hides the splash screen.

Where are you putting this init.py script, is it a text datablock in the startup.blend, part of an addon, ..? Regardless, I guess the problem is that any script will run after the startup.blend has already been loaded. This isn't really something we can change I think, as running a script without Blender data would be problematic, the code relies too much on there being a valid database, window manager, scene, etc.%%%

%%%When the splash screen shows, the startup.blend has already been loaded, clicking next to it does not cause it any file load, it just hides the splash screen. Where are you putting this __init__.py script, is it a text datablock in the startup.blend, part of an addon, ..? Regardless, I guess the problem is that any script will run after the startup.blend has already been loaded. This isn't really something we can change I think, as running a script without Blender data would be problematic, the code relies too much on there being a valid database, window manager, scene, etc.%%%

Emanuele Gissi commented

2013-03-15 11:52:35 +01:00

%%%This init.py script is part of an addon.
This is a load_post handler, then it should be run after the startup.blend has already been loaded.

If I reload the default startup file by the File > New menu, then the load_post handler is correctly run.

I think that the problem is specific to Blender first load of the default startup file, that forgets to run the load_post handler after the loading operation.
Emanuele%%%

%%%This __init__.py script is part of an addon. This is a load_post handler, then it should be run *after* the startup.blend has already been loaded. If I reload the default startup file by the File > New menu, then the load_post handler is correctly run. I think that the problem is specific to Blender first load of the default startup file, that forgets to run the load_post handler after the loading operation. Emanuele%%%

CodeManX commented

2013-03-16 00:08:36 +01:00

%%%see attached image to understand the timing!

(load_post_handler_timing.png)%%%

%%%see attached image to understand the timing! (load_post_handler_timing.png)%%%

Emanuele Gissi commented

2013-03-17 23:34:48 +01:00

%%%Ok, now I understand the timing...

I should say that it would be more coherent and less confusing for addons users to run the load_post script at a later time for default startup file.
Is it feasible?
Emanuele%%%

%%%Ok, now I understand the timing... I should say that it would be more coherent and less confusing for addons users to run the load_post script at a later time for default startup file. Is it feasible? Emanuele%%%

CodeManX commented

2013-03-17 23:39:22 +01:00

%%%there's a possible work-around, but i'd call it hacky:
http://blenderartists.org/forum/showthread.php?233979-how-to-run-bpy-app-handlers-load_post-every-time-after-file-loaded&p=2332342#post2332342%%%

%%%there's a possible work-around, but i'd call it hacky: http://blenderartists.org/forum/showthread.php?233979-how-to-run-bpy-app-handlers-load_post-every-time-after-file-loaded&p=2332342#post2332342%%%

Emanuele Gissi commented

2013-03-18 09:59:43 +01:00

%%%Thank you Neil, I am going to include your wonderful suggestion in my code.
Though I think that a proper solution should be found.
Emanuele%%%

%%%Thank you Neil, I am going to include your wonderful suggestion in my code. Though I think that a proper solution should be found. Emanuele%%%

Campbell Barton commented

2013-03-28 07:37:18 +01:00

%%%fixed r55643.%%%

Campbell Barton commented

2013-03-28 07:37:18 +01:00

Changed status from 'Open' to: 'Resolved'

Campbell Barton closed this issue

2013-03-28 07:37:18 +01:00

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bpy.app.handlers.load_post not run on startup file loading after splashscreen #34636