I initially asked this question on blender-stack_exchange here:
But everyone is focused on my folder tree rather than answering the question…
I want a folder selection in my pop-up window, nothing hard to understand there…
Anyways, could I get some help here please, all I want to do is update a template_list…
I know it’s possible, but I don’t know how.
Thank you. 
Just to understand correctly, you’re saying that the code is working, but you don’t see the changes until you reopen the dialog?
Yeah, but also, if i click the arrows to collapse (without closing the ui) after I know they’re expanded, blender crashes.
Do you think it could possibly just not be redrawing after the changes? You could add a check if that’s the case:
def check(self, context):
return True
… and that might even be the cause of the crash as well. Just theorizing here…
Possibly, but how would I make it redraw??
wm.redraw_timer() seems to do nothing, unless I’m just executing it in the wrong context…
You put the code I posted in your operator, like after the execute.
Lol, excuse my noobishness there, sorry 
So I tried it and blender crashes instantly when I click the arrow… >_>
Hmm. Hard to suggest anything else without seeing more code. You can pm me if you don’t want to share public.
Lol, phones aren’t very friendly when it comes to stuff like that…
Hold on, I’ll see what I can do.
I hate phones btw, I’m only forced to use one…
Internet is too expensive for us…
init.py
# -*- coding: utf-8 -*-
'''
CustomSteve 1.3.0 Beta Character Exporter Version 1.0.0 Alpha
'''
bl_info={
'category': 'Import-Export',
'name': 'customsteve_char_export',
'author': 'Tcll5850',
'version': (1,0,0),
'blender': (2,7,5),
'location': 'File > Import-Export',
'description': 'Export a CustomSteve character',
'support': 'COMMUNITY',
}
import sys,subprocess
if 'win' in sys.platform:
from string import ascii_uppercase
from ctypes import windll
drives = ['%s:/'%ascii_uppercase[i] for i,v in enumerate(bin(windll.kernel32.GetLogicalDrives())[:1:-1]) if v=='1']
del ascii_uppercase
del windll
else:
drives = [str(drive.split()[2])[2:-1] for drive in subprocess.Popen( 'mount', shell=True, stdout=subprocess.PIPE ).communicate()[0].split(b'
') if drive.startswith(b'/dev')]
if 'bpy' in locals():
from importlib import reload
# noinspection PyUnresolvedReferences,PyUnboundLocalVariable
reload(O)
# noinspection PyUnresolvedReferences,PyUnboundLocalVariable
reload(B)
else:
import bpy
from bpy.props import StringProperty, IntProperty, BoolProperty, CollectionProperty, PointerProperty
from . import O,B
class Exporter_Dialog( bpy.types.Operator ):
bl_idname = 'export_action.cs_char_dlg'
bl_label = 'CS Character Exporter'
mcDir = StringProperty( name="Minecraft Directory",
description="Directory path used for exporting associate files", maxlen=1024, subtype='NONE' )
check = lambda this, context: True
def execute( this, context ):
print('executed')
return {'FINISHED'}
def invoke( this, context, event ):
D = context.scene.CSCEData
B.character_rigs[:] = [] # clear
characters = D.characters
characters.clear()
for obj in bpy.data.objects:
if obj.type!='ARMATURE' or not obj.animation_data: continue
char = characters.add()
char.name = obj.name
B.character_rigs.append(obj)
tracks = D.tracks
tracks.clear()
for obj in B.character_rigs:
armature = obj.name
for track in obj.animation_data.nla_tracks:
name = track.name
track = tracks.add()
track.armature = armature
track.name = name
B.expanded_directories[:] = [] # clear
B.folders = folders = D.folders
folders.clear()
for drive in drives:
folder = folders.add()
folder.path = drive
folder.name = drive.split('/')[-1] or '/'
folder.level = 0 # drives are the roots
context.window_manager.invoke_props_dialog(this,width=800)
return {'RUNNING_MODAL'}
@classmethod
def menu_func( this, menu, context): menu.layout.operator( this.bl_idname, text='CustomSteve Character', icon='PLUGIN')
def draw( this, context ):
layout = this.layout
D = context.scene.CSCEData
columns = layout.split(.55)
info_column = columns.column()
selection_lists = info_column.split(.50)
character_list = selection_lists.column()
character_list.label( text='Select Characters:' )
character_list.template_list( "EXPORT_ACTION_UL_CS_Characters", "", D, "characters", D, "character_index", rows=10, maxrows=10 )
track_list = selection_lists.column()
track_list.label( text='Select Tracks:' )
track_list.template_list( "EXPORT_ACTION_UL_CS_Tracks", "", D, "tracks", D, "track_index", rows=10, maxrows=10 )
toggle_subspace = track_list.split( .19 )
toggle_subspace.label( text='Select' )
buttons = toggle_subspace.row( align=True )
props = buttons.operator( "scene.track_toggle", text='All' ); props.type = 'all'
props = buttons.operator( "scene.track_toggle", text='None' ); props.type = 'none'
props = buttons.operator( "scene.track_toggle", text='Inverse' ); props.type = 'inverse'
# directory tree:
directory_column = columns.column()
directory_column.alignment = 'LEFT'
directory_column.prop(this,'mcDir')
directory_column.template_list( "EXPORT_ACTION_UL_CS_Folders", "", D, "folders", D, "folder_index", rows=20, maxrows=20 )
print(D.folders.__doc__)
def register():
global registered; registered = True
bpy.utils.register_module(__name__)
bpy.types.INFO_MT_file_export.append(Exporter_Dialog.menu_func)
bpy.types.Scene.CSCEData = PointerProperty( type=B.CSCEData )
def unregister():
global registered; registered = False
bpy.utils.unregister_module(__name__)
bpy.types.INFO_MT_file_export.remove(Exporter_Dialog.menu_func)
del bpy.types.Scene.CSCEData
B.py
# -*- coding: utf-8 -*-
# noinspection PyUnresolvedReferences
from bpy.props import StringProperty,IntProperty,BoolProperty,CollectionProperty,PointerProperty
import bpy, os
from . import drives
character_rigs = []
expanded_directories = []
toggle = True
folders = None
class Selection_Toggle( bpy.types.Operator ):
bl_idname = "scene.track_toggle"
bl_label = ""
bl_option = {'REGISTER'}
type = StringProperty( name='Selection Type' )
def invoke( this, context, event ):
Type = this.properties.type
CS_Tracks = context.scene.CS_Tracks
if Type=='all':
for track in CS_Tracks.tracks: track.export = True
if Type=='none':
for track in CS_Tracks.tracks: track.export = False
if Type=='inverse':
for track in CS_Tracks.tracks: track.export = not track.export
return {'RUNNING_MODAL'}
def recurse(directory,level=0):
global folders
for entry in os.listdir(directory):
fullpath=( '%s%s' if directory[-1]=='/' else '%s/%s' )%(directory,entry)
if os.path.isdir(fullpath):
folder=folders.add()
folder.path=fullpath
folder.name=entry
folder.level=level
if fullpath in expanded_directories:
recurse(fullpath,level+1)
folder.expand=True
def expand_toggle(folder,context):
global toggle,folders,expanded_directories
# NOTE: folder.expand is set before getting here
if toggle: # this should ONLY be True when folder.expand is clicked (not set)
if folder.expand: expanded_directories.append( folder.path )
elif folder.path in expanded_directories: expanded_directories.remove( folder.path )
# NOTE: the initial invoke of the dialog class does the same thing as here (no recursion).
folders.clear() # why doesn't this clear the UI?
toggle=False # don't update when setting `folder.expand`
for drive in drives:
folder=folders.add()
folder.path=drive
folder.name=drive.split('/')[-1] or '/'
folder.level=0 # drives are the roots
if drive in expanded_directories:
recurse(drive,1)
folder.expand=True # this would call this function (recursion depth error)
toggle=True
def character_toggle(character,context):
pass
class EXPORT_ACTION_UL_CS_Characters( bpy.types.UIList ):
def draw_item( self, context, layout, data, item, icon, active_data, active_propname, index ):
layout.alignment='LEFT'
layout.prop( item, "export", text=item.name, emboss=False, translate=False, icon='OUTLINER_OB_ARMATURE' )
class Character( bpy.types.PropertyGroup ):
name = StringProperty( name="Character Name" )
export = BoolProperty( name="Export", description="Export this character", default=True, update=character_toggle )
class EXPORT_ACTION_UL_CS_Tracks( bpy.types.UIList ):
def draw_item( self, context, layout, data, item, icon, active_data, active_propname, index ):
layout.alignment='LEFT'
layout.prop( item, "export", text='%s : %s'%(item.armature,item.name), emboss=False, translate=False, icon='NLA' )
class Track( bpy.types.PropertyGroup ):
armature, name = StringProperty( name="Armature Name" ), StringProperty( name="Track Name" )
export = BoolProperty( name="Export", description="Export this track", default=True )
class EXPORT_ACTION_UL_CS_Folders( bpy.types.UIList ):
def draw_item( self, context, layout, data, item, icon, active_data, active_propname, index ):
layout.alignment='LEFT'
for i in range(item.level): layout.label(text='')
layout.prop( item, "expand", text='', emboss=False, translate=False, icon='TRIA_DOWN' if item.expand else 'TRIA_RIGHT', icon_only=True, )
layout.label(text=item.name, icon='FILE_FOLDER' if item.level else 'DISK_DRIVE')
class Folder( bpy.types.PropertyGroup ):
name=StringProperty( name="Folder Name" )
path=StringProperty( name="Path" )
expand=BoolProperty( name="Expand", description="", default=False, update=expand_toggle)
level=IntProperty()
class CSCEData( bpy.types.PropertyGroup ):
# template_list wrapper (since collections don't come with a required index property)
characters = CollectionProperty( name="Characters", type=Character, description="Select characters to export" )
character_index = IntProperty()
tracks = CollectionProperty( name="Tracks", type=Track, description="Select tracks to export" )
track_index = IntProperty()
folders=CollectionProperty( name="Folders", type=Folder, description="Select a folder" )
folder_index=IntProperty()
Sorry for multi-posting… if I could keep things to 1 post, I would…
You can ignore O.py in the imports…
All that is, is file Output code.
EDIT: and no, I’m not worried about my code
It’s to be distributed with CustomSteve anyways when finished, SO yea…
Thanks though
I take it I found a blender bug
Lol, phones aren’t very friendly when it comes to stuff like that…
Huh?
I just had a chance to test out the code. The behavior I’m getting is I click an arrow and it expands/collapses. The problem comes when I click a folder with permission issues,
PermissionError: [WinError 5] Access is denied: 'C:/Documents and Settings'
or a drive that isn’t ready.
PermissionError: [WinError 21] The device is not ready: 'E:/'
Then the code fails and the arrows stop working until the script is reloaded.
Huh… blender just up and crashes when i click anything in the dialog 
Maybe it’s cause I’m on Linux…
Sucks because I can’t update, unless there’s a .deb installer I’m unaware of
EDIT: found one
EDIT2: nvm, foolishly didn’t read the fine print >.<
It’s an older version than I have
Ok, so I just tried manually updating to the version I had on my laptop being 2.77, but to no avail… The crash still happens…
Even tried on my laptop but it still crashed…
I guess you must be using a Windows version I don’t dare touch… (anything above XP)
If XP is too old, then Linux shouldn’t be used because it’s far older.
Such a shame blender is now using python 3.5, for which the C-API modules don’t work on XP…
Anyways… is there anything I can do to possibly stop blender from crashing??
Here’s my crash log as well:
# Blender 2.77 (sub 0), Commit date: 2016-04-05 18:12, Hash abf6f08
bpy.data.window_managers["WinMan"].addon_search = "char" # Property
# backtrace
/usr/lib/blender/blender(BLI_system_backtrace+0x1d) [0x15fff0d]
/usr/lib/blender/blender() [0xcb5908]
/lib/x86_64-linux-gnu/libc.so.6(+0x36d40) [0x7fa43cba0d40]
/usr/lib/blender/blender(BLI_findstring+0xa) [0x15ce68a]
/usr/lib/blender/blender(uiTemplateList+0x29d) [0xeac54d]
/usr/lib/blender/blender(UILayout_template_list_call+0x58) [0x1542858]
/usr/lib/blender/blender(RNA_function_call+0x12) [0x14559e2]
/usr/lib/blender/blender() [0x1089ca8]
/usr/lib/x86_64-linux-gnu/libpython3.5m.so.1.0(PyObject_Call+0x6a) [0x7fa44634c4ba]
/usr/lib/x86_64-linux-gnu/libpython3.5m.so.1.0(PyEval_EvalFrameEx+0x378b) [0x7fa44632cf1b]
/usr/lib/x86_64-linux-gnu/libpython3.5m.so.1.0(+0x1f2632) [0x7fa446384632]
/usr/lib/x86_64-linux-gnu/libpython3.5m.so.1.0(PyEval_EvalCodeEx+0x48) [0x7fa446384748]
/usr/lib/x86_64-linux-gnu/libpython3.5m.so.1.0(+0x1f2cf6) [0x7fa446384cf6]
/usr/lib/x86_64-linux-gnu/libpython3.5m.so.1.0(PyObject_Call+0x6a) [0x7fa44634c4ba]
/usr/lib/blender/blender() [0x108a32e]
/usr/lib/blender/blender() [0x155d466]
/usr/lib/blender/blender(uiLayoutOperatorButs+0xad) [0xe9679d]
/usr/lib/blender/blender() [0xccab9f]
/usr/lib/blender/blender(ui_popup_block_refresh+0x76) [0xe9fac6]
/usr/lib/blender/blender() [0xea0ad9]
/usr/lib/blender/blender(ED_region_do_draw+0x99f) [0xf714af]
/usr/lib/blender/blender(wm_draw_update+0x50f) [0xcbc91f]
/usr/lib/blender/blender(WM_main+0x28) [0xcb8198]
/usr/lib/blender/blender(main+0xefa) [0xc7d43a]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7fa43cb8bec5]
/usr/lib/blender/blender() [0xcb531f]
Found my problem, and why it worked for you…
I was using PPA-updated distributions which apparently aren’t very reliable…
I’ve just figured out how to install from the site and that worked as it should’ve… so everything works as it’s supposed to now.
Thanks everyone for your help
Wasn’t much help, and I wouldn’t have figured that out, but I’m glad you got it worked out.