Bumped version to 1.6.2

This is very useful for opening render output directories from Blender,
as those will only exist after rendering has started.

blender_cloud/__init__.py

@@ -21,7 +21,7 @@
 bl_info = {
     'name': 'Blender Cloud',
     "author": "Sybren A. Stüvel, Francesco Siddi, Inês Almeida, Antony Riakiotakis",
-    'version': (1, 6, 0),
+    'version': (1, 6, 2),
     'blender': (2, 77, 0),
     'location': 'Addon Preferences panel, and Ctrl+Shift+Alt+A anywhere for texture browser',
     'description': 'Texture library browser and Blender Sync. Requires the Blender ID addon '
@@ -94,6 +94,8 @@ def register():
     image_sharing.register()
     attract.register()
 
+    blender.handle_project_update()
+
 
 def _monkey_patch_requests():
     """Monkey-patch old versions of Requests.

blender_cloud/attract/__init__.py

@@ -60,6 +60,9 @@ from bpy.types import Operator, Panel, AddonPreferences
 
 log = logging.getLogger(__name__)
 
+# Global flag used to determine whether panels etc. can be drawn.
+attract_is_active = False
+
 
 def active_strip(context):
     try:
@@ -139,6 +142,9 @@ def shot_id_use(strips):
 def compute_strip_conflicts(scene):
     """Sets the strip property atc_object_id_conflict for each strip."""
 
+    if not attract_is_active:
+        return
+
     if not scene or not scene.sequence_editor or not scene.sequence_editor.sequences_all:
         return
 
@@ -161,7 +167,13 @@ def scene_update_post_handler(scene):
     compute_strip_conflicts(scene)
 
 
-class ToolsPanel(Panel):
+class AttractPollMixin:
+    @classmethod
+    def poll(cls, context):
+        return attract_is_active
+
+
+class ToolsPanel(AttractPollMixin, Panel):
     bl_label = 'Attract'
     bl_space_type = 'SEQUENCE_EDITOR'
     bl_region_type = 'UI'
@@ -238,7 +250,7 @@ class ToolsPanel(Panel):
             layout.operator(ATTRACT_OT_submit_all.bl_idname)
 
 
-class AttractOperatorMixin:
+class AttractOperatorMixin(AttractPollMixin):
     """Mix-in class for all Attract operators."""
 
     def _project_needs_setup_error(self):
@@ -261,7 +273,7 @@ class AttractOperatorMixin:
         from .. import pillar, blender
 
         prefs = blender.preferences()
-        project = self.find_project(prefs.attract_project.project)
+        project = self.find_project(prefs.project.project)
 
         # FIXME: Eve doesn't seem to handle the $elemMatch projection properly,
         # even though it works fine in MongoDB itself. As a result, we have to
@@ -295,7 +307,7 @@ class AttractOperatorMixin:
                                'cut_in_timeline_in_frames': strip.frame_final_start},
                 'order': 0,
                 'node_type': 'attract_shot',
-                'project': blender.preferences().attract_project.project,
+                'project': blender.preferences().project.project,
                 'user': user_uuid}
 
         # Create a Node item with the attract API
@@ -373,7 +385,7 @@ class AttractShotFetchUpdate(AttractOperatorMixin, Operator):
 
     @classmethod
     def poll(cls, context):
-        return any(selected_shots(context))
+        return AttractOperatorMixin.poll(context) and any(selected_shots(context))
 
     def execute(self, context):
         for strip in selected_shots(context):
@@ -393,6 +405,9 @@ class AttractShotRelink(AttractShotFetchUpdate):
 
     @classmethod
     def poll(cls, context):
+        if not AttractOperatorMixin.poll(context):
+            return False
+
         strip = active_strip(context)
         return strip is not None and not getattr(strip, 'atc_object_id', None)
 
@@ -433,7 +448,8 @@ class ATTRACT_OT_shot_open_in_browser(AttractOperatorMixin, Operator):
 
     @classmethod
     def poll(cls, context):
-        return bool(context.selected_sequences and active_strip(context))
+        return AttractOperatorMixin.poll(context) and \
+               bool(context.selected_sequences and active_strip(context))
 
     def execute(self, context):
         from ..blender import PILLAR_WEB_SERVER_URL
@@ -459,7 +475,8 @@ class AttractShotDelete(AttractOperatorMixin, Operator):
 
     @classmethod
     def poll(cls, context):
-        return bool(context.selected_sequences)
+        return AttractOperatorMixin.poll(context) and \
+               bool(context.selected_sequences)
 
     def execute(self, context):
         from .. import pillar
@@ -511,7 +528,8 @@ class AttractStripUnlink(AttractOperatorMixin, Operator):
 
     @classmethod
     def poll(cls, context):
-        return bool(context.selected_sequences)
+        return AttractOperatorMixin.poll(context) and \
+               bool(context.selected_sequences)
 
     def execute(self, context):
         unlinked_ids = set()
@@ -554,7 +572,8 @@ class AttractShotSubmitSelected(AttractOperatorMixin, Operator):
 
     @classmethod
     def poll(cls, context):
-        return bool(context.selected_sequences)
+        return AttractOperatorMixin.poll(context) and \
+               bool(context.selected_sequences)
 
     def execute(self, context):
         # Check that the project is set up for Attract.
@@ -610,7 +629,8 @@ class ATTRACT_OT_open_meta_blendfile(AttractOperatorMixin, Operator):
 
     @classmethod
     def poll(cls, context):
-        return bool(any(cls.filename_from_metadata(s) for s in context.selected_sequences))
+        return AttractOperatorMixin.poll(context) and \
+               bool(any(cls.filename_from_metadata(s) for s in context.selected_sequences))
 
     @staticmethod
     def filename_from_metadata(strip):
@@ -677,7 +697,7 @@ class ATTRACT_OT_make_shot_thumbnail(AttractOperatorMixin,
 
     @classmethod
     def poll(cls, context):
-        return bool(context.selected_sequences)
+        return AttractOperatorMixin.poll(context) and bool(context.selected_sequences)
 
     @contextlib.contextmanager
     def thumbnail_render_settings(self, context, thumbnail_width=512):
@@ -843,7 +863,7 @@ class ATTRACT_OT_make_shot_thumbnail(AttractOperatorMixin,
         from .. import blender
 
         prefs = blender.preferences()
-        project = self.find_project(prefs.attract_project.project)
+        project = self.find_project(prefs.project.project)
 
         self.log.info('Uploading file %s', filename)
         resp = await pillar.pillar_call(
@@ -873,7 +893,8 @@ class ATTRACT_OT_copy_id_to_clipboard(AttractOperatorMixin, Operator):
 
     @classmethod
     def poll(cls, context):
-        return bool(context.selected_sequences and active_strip(context))
+        return AttractOperatorMixin.poll(context) and \
+               bool(context.selected_sequences and active_strip(context))
 
     def execute(self, context):
         strip = active_strip(context)
@@ -905,6 +926,29 @@ def draw_strip_movie_meta(self, context):
     box.label('Original Frame Range: %s-%s' % (sfra, efra))
 
 
+def activate():
+    global attract_is_active
+
+    log.info('Activating Attract')
+    attract_is_active = True
+    bpy.app.handlers.scene_update_post.append(scene_update_post_handler)
+    draw.callback_enable()
+
+
+def deactivate():
+    global attract_is_active
+
+    log.info('Deactivating Attract')
+    attract_is_active = False
+    draw.callback_disable()
+
+    try:
+        bpy.app.handlers.scene_update_post.remove(scene_update_post_handler)
+    except ValueError:
+        # This is thrown when scene_update_post_handler does not exist in the handler list.
+        pass
+
+
 def register():
     bpy.types.Sequence.atc_is_synced = bpy.props.BoolProperty(name="Is Synced")
     bpy.types.Sequence.atc_object_id = bpy.props.StringProperty(name="Attract Object ID")
@@ -942,13 +986,9 @@ def register():
     bpy.utils.register_class(ATTRACT_OT_make_shot_thumbnail)
     bpy.utils.register_class(ATTRACT_OT_copy_id_to_clipboard)
 
-    bpy.app.handlers.scene_update_post.append(scene_update_post_handler)
-    draw.callback_enable()
-
 
 def unregister():
-    draw.callback_disable()
-    bpy.app.handlers.scene_update_post.remove(scene_update_post_handler)
+    deactivate()
     bpy.utils.unregister_module(__name__)
     del bpy.types.Sequence.atc_is_synced
     del bpy.types.Sequence.atc_object_id

blender_cloud/attract/draw.py

@@ -172,6 +172,11 @@ def callback_disable():
     if not cb_handle:
         return
 
-    bpy.types.SpaceSequenceEditor.draw_handler_remove(cb_handle[0], 'WINDOW')
+    try:
+        bpy.types.SpaceSequenceEditor.draw_handler_remove(cb_handle[0], 'WINDOW')
+    except ValueError:
+        # Thrown when already removed.
+        pass
+    cb_handle.clear()
 
     tag_redraw_all_sequencer_editors()

blender_cloud/blender.py

@@ -20,7 +20,7 @@
 
 Separated from __init__.py so that we can import & run from non-Blender environments.
 """
-
+import functools
 import logging
 import os.path
 
@@ -109,13 +109,61 @@ class SyncStatusProperties(PropertyGroup):
 def bcloud_available_projects(self, context):
     """Returns the list of items used by BlenderCloudProjectGroup.project EnumProperty."""
 
-    attr_proj = preferences().attract_project
-    projs = attr_proj.available_projects
+    projs = preferences().project.available_projects
     if not projs:
         return [('', 'No projects available in your Blender Cloud', '')]
     return [(p['_id'], p['name'], '') for p in projs]
 
 
+@functools.lru_cache(1)
+def project_extensions(project_id) -> set:
+    """Returns the extensions the project is enabled for.
+
+    At the moment of writing these are 'attract' and 'flamenco'.
+    """
+
+    log.debug('Finding extensions for project %s', project_id)
+
+    # We can't use our @property, since the preferences may be loaded from a
+    # preferences blend file, in which case it is not constructed from Python code.
+    available_projects = preferences().project.get('available_projects', [])
+    if not available_projects:
+        log.debug('No projects available.')
+        return set()
+
+    proj = next((p for p in available_projects
+                 if p['_id'] == project_id), None)
+    if proj is None:
+        log.debug('Project %s not found in available projects.', project_id)
+        return set()
+
+    return set(proj.get('enabled_for', ()))
+
+
+def handle_project_update(_=None, _2=None):
+    """Handles changing projects, which may cause extensions to be disabled/enabled.
+
+    Ignores arguments so that it can be used as property update callback.
+    """
+
+    project_id = preferences().project.project
+    log.info('Updating internal state to reflect extensions enabled on current project %s.',
+             project_id)
+
+    project_extensions.cache_clear()
+
+    from blender_cloud import attract, flamenco
+    attract.deactivate()
+    flamenco.deactivate()
+
+    enabled_for = project_extensions(project_id)
+    log.info('Project extensions: %s', enabled_for)
+    if 'attract' in enabled_for:
+        attract.activate()
+    if 'flamenco' in enabled_for:
+        flamenco.activate()
+
+
 class BlenderCloudProjectGroup(PropertyGroup):
     status = EnumProperty(
         items=[
@@ -129,7 +177,9 @@ class BlenderCloudProjectGroup(PropertyGroup):
     project = EnumProperty(
         items=bcloud_available_projects,
         name='Cloud project',
-        description='Which Blender Cloud project to work with')
+        description='Which Blender Cloud project to work with',
+        update=handle_project_update
+    )
 
     # List of projects is stored in 'available_projects' ID property,
     # because I don't know how to store a variable list of strings in a proper RNA property.
@@ -140,6 +190,7 @@ class BlenderCloudProjectGroup(PropertyGroup):
     @available_projects.setter
     def available_projects(self, new_projects):
         self['available_projects'] = new_projects
+        handle_project_update()
 
 
 class BlenderCloudPreferences(AddonPreferences):
@@ -165,9 +216,10 @@ class BlenderCloudPreferences(AddonPreferences):
         default=True
     )
 
-    # TODO: store local path with the Attract project, so that people
-    # can switch projects and the local path switches with it.
-    attract_project = PointerProperty(type=BlenderCloudProjectGroup)
+    # TODO: store project-dependent properties with the project, so that people
+    # can switch projects and the Attract and Flamenco properties switch with it.
+    project = PointerProperty(type=BlenderCloudProjectGroup)
+
     attract_project_local_path = StringProperty(
         name='Local Project Path',
         description='Local path of your Attract project, used to search for blend files; '
@@ -219,8 +271,8 @@ class BlenderCloudPreferences(AddonPreferences):
             blender_id_profile = None
         else:
             blender_id_profile = blender_id.get_active_profile()
-
         if blender_id is None:
+
             msg_icon = 'ERROR'
             text = 'This add-on requires Blender ID'
             help_text = 'Make sure that the Blender ID add-on is installed and activated'
@@ -286,13 +338,22 @@ class BlenderCloudPreferences(AddonPreferences):
         share_box.label('Image Sharing on Blender Cloud', icon_value=icon('CLOUD'))
         share_box.prop(self, 'open_browser_after_share')
 
+        # Project selector
+        project_box = layout.box()
+        project_box.enabled = self.project.status in {'NONE', 'IDLE'}
+
+        self.draw_project_selector(project_box, self.project)
+        extensions = project_extensions(self.project.project)
+
         # Attract stuff
-        attract_box = layout.box()
-        self.draw_attract_buttons(attract_box, self.attract_project)
+        if 'attract' in extensions:
+            attract_box = project_box.column()
+            self.draw_attract_buttons(attract_box, self.project)
 
         # Flamenco stuff
-        flamenco_box = layout.box()
-        self.draw_flamenco_buttons(flamenco_box, self.flamenco_manager, context)
+        if 'flamenco' in extensions:
+            flamenco_box = project_box.column()
+            self.draw_flamenco_buttons(flamenco_box, self.flamenco_manager, context)
 
     def draw_subscribe_button(self, layout):
         layout.operator('pillar.subscribe', icon='WORLD')
@@ -328,12 +389,11 @@ class BlenderCloudPreferences(AddonPreferences):
         else:
             row_pull.label('Cloud Sync is running.')
 
-    def draw_attract_buttons(self, attract_box, bcp: BlenderCloudProjectGroup):
-        attract_row = attract_box.row(align=True)
-        attract_row.label('Attract', icon_value=icon('CLOUD'))
+    def draw_project_selector(self, project_box, bcp: BlenderCloudProjectGroup):
+        project_row = project_box.row(align=True)
+        project_row.label('Project settings', icon_value=icon('CLOUD'))
 
-        attract_row.enabled = bcp.status in {'NONE', 'IDLE'}
-        row_buttons = attract_row.row(align=True)
+        row_buttons = project_row.row(align=True)
 
         projects = bcp.available_projects
         project = bcp.project
@@ -350,27 +410,38 @@ class BlenderCloudPreferences(AddonPreferences):
         else:
             row_buttons.label('Fetching available projects.')
 
-        attract_box.prop(self, 'attract_project_local_path')
+        enabled_for = project_extensions(project)
+        if project:
+            if enabled_for:
+                project_box.label('This project is set up for: %s' %
+                                  ', '.join(sorted(enabled_for)))
+            else:
+                project_box.label('This project is not set up for Attract or Flamenco')
+
+    def draw_attract_buttons(self, attract_box, bcp: BlenderCloudProjectGroup):
+        header_row = attract_box.row(align=True)
+        header_row.label('Attract:', icon_value=icon('CLOUD'))
+        attract_box.prop(self, 'attract_project_local_path',
+                         text='Local Attract project path')
 
     def draw_flamenco_buttons(self, flamenco_box, bcp: flamenco.FlamencoManagerGroup, context):
-        flamenco_row = flamenco_box.row(align=True)
-        flamenco_row.label('Flamenco', icon_value=icon('CLOUD'))
+        header_row = flamenco_box.row(align=True)
+        header_row.label('Flamenco:', icon_value=icon('CLOUD'))
 
-        flamenco_row.enabled = bcp.status in {'NONE', 'IDLE'}
-        row_buttons = flamenco_row.row(align=True)
+        manager_box = flamenco_box.row(align=True)
 
         if bcp.status in {'NONE', 'IDLE'}:
             if not bcp.available_managers or not bcp.manager:
-                row_buttons.operator('flamenco.managers',
+                manager_box.operator('flamenco.managers',
                                      text='Find Flamenco Managers',
                                      icon='FILE_REFRESH')
             else:
-                row_buttons.prop(bcp, 'manager', text='Manager')
-                row_buttons.operator('flamenco.managers',
+                manager_box.prop(bcp, 'manager', text='Manager')
+                manager_box.operator('flamenco.managers',
                                      text='',
                                      icon='FILE_REFRESH')
         else:
-            row_buttons.label('Fetching available managers.')
+            manager_box.label('Fetching available managers.')
 
         path_box = flamenco_box.row(align=True)
         path_box.prop(self, 'flamenco_job_file_path')
@@ -400,11 +471,6 @@ class BlenderCloudPreferences(AddonPreferences):
 
         flamenco_box.prop(self, 'flamenco_open_browser_after_submit')
 
-        # TODO: make a reusable way to select projects, and use that for Attract and Flamenco.
-        note_box = flamenco_box.column(align=True)
-        note_box.label('NOTE: For now, Flamenco uses the same project as Attract.')
-        note_box.label('This will change in a future version of the add-on.')
-
 
 class PillarCredentialsUpdate(pillar.PillarOperatorMixin,
                               Operator):
@@ -488,7 +554,7 @@ class PILLAR_OT_projects(async_loop.AsyncModalOperatorMixin,
 
         self.log.info('Going to fetch projects for user %s', self.user_id)
 
-        preferences().attract_project.status = 'FETCHING'
+        preferences().project.status = 'FETCHING'
 
         # Get all projects, except the home project.
         projects_user = await pillar_call(
@@ -497,7 +563,8 @@ class PILLAR_OT_projects(async_loop.AsyncModalOperatorMixin,
                        'category': {'$ne': 'home'}},
              'sort': '-_created',
              'projection': {'_id': True,
-                            'name': True},
+                            'name': True,
+                            'extension_props': True},
              })
 
         projects_shared = await pillar_call(
@@ -506,20 +573,34 @@ class PILLAR_OT_projects(async_loop.AsyncModalOperatorMixin,
                        'permissions.groups.group': {'$in': self.db_user.groups}},
              'sort': '-_created',
              'projection': {'_id': True,
-                            'name': True},
+                            'name': True,
+                            'extension_props': True},
              })
 
         # We need to convert to regular dicts before storing in ID properties.
         # Also don't store more properties than we need.
-        projects = [{'_id': p['_id'], 'name': p['name']} for p in projects_user['_items']] + \
-                   [{'_id': p['_id'], 'name': p['name']} for p in projects_shared['_items']]
+        def reduce_properties(project_list):
+            for p in project_list:
+                p = p.to_dict()
+                extension_props = p.get('extension_props', {})
+                enabled_for = list(extension_props.keys())
 
-        preferences().attract_project.available_projects = projects
+                self._log.debug('Project %r is enabled for %s', p['name'], enabled_for)
+                yield {
+                    '_id': p['_id'],
+                    'name': p['name'],
+                    'enabled_for': enabled_for,
+                }
+
+        projects = list(reduce_properties(projects_user['_items'])) + \
+                   list(reduce_properties(projects_shared['_items']))
+
+        preferences().project.available_projects = projects
 
         self.quit()
 
     def quit(self):
-        preferences().attract_project.status = 'IDLE'
+        preferences().project.status = 'IDLE'
         super().quit()
 
 

blender_cloud/flamenco/__init__.py

@@ -34,6 +34,9 @@ from ..utils import pyside_cache, redraw
 
 log = logging.getLogger(__name__)
 
+# Global flag used to determine whether panels etc. can be drawn.
+flamenco_is_active = False
+
 
 @pyside_cache('manager')
 def available_managers(self, context):
@@ -73,8 +76,15 @@ class FlamencoManagerGroup(PropertyGroup):
         self['available_managers'] = new_managers
 
 
+class FlamencoPollMixin:
+    @classmethod
+    def poll(cls, context):
+        return flamenco_is_active
+
+
 class FLAMENCO_OT_fmanagers(async_loop.AsyncModalOperatorMixin,
                             pillar.AuthenticatedPillarOperatorMixin,
+                            FlamencoPollMixin,
                             Operator):
     """Fetches the Flamenco Managers available to the user"""
     bl_idname = 'flamenco.managers'
@@ -115,6 +125,7 @@ class FLAMENCO_OT_fmanagers(async_loop.AsyncModalOperatorMixin,
 
 class FLAMENCO_OT_render(async_loop.AsyncModalOperatorMixin,
                          pillar.AuthenticatedPillarOperatorMixin,
+                         FlamencoPollMixin,
                          Operator):
     """Performs a Blender render on Flamenco."""
     bl_idname = 'flamenco.render'
@@ -162,7 +173,11 @@ class FLAMENCO_OT_render(async_loop.AsyncModalOperatorMixin,
 
         # Add extra settings specific to the job type
         if scene.flamenco_render_job_type == 'blender-render-progressive':
-            samples = scene.cycles.samples
+            if scene.cycles.progressive == 'BRANCHED_PATH':
+                samples = scene.cycles.aa_samples
+            else:
+                samples = scene.cycles.samples
+
             if scene.cycles.use_square_samples:
                 samples **= 2
 
@@ -172,7 +187,7 @@ class FLAMENCO_OT_render(async_loop.AsyncModalOperatorMixin,
 
         try:
             job_info = await create_job(self.user_id,
-                                        prefs.attract_project.project,
+                                        prefs.project.project,
                                         prefs.flamenco_manager.manager,
                                         scene.flamenco_render_job_type,
                                         settings,
@@ -304,7 +319,7 @@ class FLAMENCO_OT_render(async_loop.AsyncModalOperatorMixin,
         return outfile, missing_sources
 
 
-class FLAMENCO_OT_scene_to_frame_range(Operator):
+class FLAMENCO_OT_scene_to_frame_range(FlamencoPollMixin, Operator):
     """Sets the scene frame range as the Flamenco render frame range."""
     bl_idname = 'flamenco.scene_to_frame_range'
     bl_label = 'Sets the scene frame range as the Flamenco render frame range'
@@ -317,6 +332,7 @@ class FLAMENCO_OT_scene_to_frame_range(Operator):
 
 
 class FLAMENCO_OT_copy_files(Operator,
+                             FlamencoPollMixin,
                              async_loop.AsyncModalOperatorMixin):
     """Uses BAM to copy the current blendfile + dependencies to the target directory."""
     bl_idname = 'flamenco.copy_files'
@@ -348,8 +364,13 @@ class FLAMENCO_OT_copy_files(Operator,
         bpy.context.window_manager.flamenco_status = 'IDLE'
 
 
-class FLAMENCO_OT_explore_file_path(Operator):
-    """Opens the Flamenco job storage path in a file explorer."""
+class FLAMENCO_OT_explore_file_path(FlamencoPollMixin,
+                                    Operator):
+    """Opens the Flamenco job storage path in a file explorer.
+
+    If the path cannot be found, this operator tries to open its parent.
+    """
+
     bl_idname = 'flamenco.explore_file_path'
     bl_label = 'Open in file explorer'
     bl_description = __doc__.rstrip('.')
@@ -358,15 +379,30 @@ class FLAMENCO_OT_explore_file_path(Operator):
 
     def execute(self, context):
         import platform
-        import subprocess
-        import os
+        import pathlib
+
+        # Possibly open a parent of the path
+        to_open = pathlib.Path(self.path)
+        while to_open.parent != to_open:  # while we're not at the root
+            if to_open.exists():
+                break
+            to_open = to_open.parent
+        else:
+            self.report({'ERROR'}, 'Unable to open %s or any of its parents.' % self.path)
+            return {'CANCELLED'}
+        to_open = str(to_open)
 
         if platform.system() == "Windows":
-            os.startfile(self.path)
+            import os
+            os.startfile(to_open)
+
         elif platform.system() == "Darwin":
-            subprocess.Popen(["open", self.path])
+            import subprocess
+            subprocess.Popen(["open", to_open])
+
         else:
-            subprocess.Popen(["xdg-open", self.path])
+            import subprocess
+            subprocess.Popen(["xdg-open", to_open])
 
         return {'FINISHED'}
 
@@ -487,7 +523,7 @@ def render_output_path(context, filepath: Path = None) -> typing.Optional[PurePa
     )
 
 
-class FLAMENCO_PT_render(bpy.types.Panel):
+class FLAMENCO_PT_render(bpy.types.Panel, FlamencoPollMixin):
     bl_label = "Flamenco Render"
     bl_space_type = 'PROPERTIES'
     bl_region_type = 'WINDOW'
@@ -552,6 +588,22 @@ class FLAMENCO_PT_render(bpy.types.Panel):
                 layout.label('Unknown Flamenco status %s' % flamenco_status)
 
 
+def activate():
+    """Activates draw callbacks, menu items etc. for Flamenco."""
+
+    global flamenco_is_active
+    log.info('Activating Flamenco')
+    flamenco_is_active = True
+
+
+def deactivate():
+    """Deactivates draw callbacks, menu items etc. for Flamenco."""
+
+    global flamenco_is_active
+    log.info('Deactivating Flamenco')
+    flamenco_is_active = False
+
+
 def register():
     from ..utils import redraw
 
@@ -611,6 +663,7 @@ def register():
 
 
 def unregister():
+    deactivate()
     bpy.utils.unregister_module(__name__)
 
     try:

blender_cloud/pillar.py

@@ -860,6 +860,13 @@ class AuthenticatedPillarOperatorMixin(PillarOperatorMixin):
             self.report({'ERROR'}, 'Please log in on Blender ID first.')
             self.quit()
             return False
+        except requests.exceptions.ConnectionError:
+            self.log.exception('Error checking pillar credentials.')
+            self.report({'ERROR'}, 'Unable to connect to Blender Cloud, '
+                                   'check your internet connection.')
+            self.quit()
+            return False
+
 
         self.user_id = self.db_user['_id']
         return True

setup.py

@@ -227,7 +227,7 @@ setup(
               'wheels': BuildWheels},
     name='blender_cloud',
     description='The Blender Cloud addon allows browsing the Blender Cloud from Blender.',
-    version='1.6.0',
+    version='1.6.2',
     author='Sybren A. Stüvel',
     author_email='sybren@stuvel.eu',
     packages=find_packages('.'),