def sv_post_load(scene):
"""
Upgrade nodes, apply preferences and do an update.
THe update order is next:
1. pre_load handler
2. update methods of trees in a file
3. post_load handler
4. evaluate trees from main tree handler
post_load handler is also called when Blender is first ran
The method should initialize Sverchok parts which are required by loaded tree
"""
from sverchok import node_tree, settings
# ensure current nodeview view scale / location parameters reflect users' system settings
node_tree.SverchCustomTree.update_gl_scale_info(None, "sv_post_load")
# register and mark old and dependent nodes
with catch_log_error():
if any(not n.is_registered_node_type() for ng in BlTrees().sv_trees
for n in ng.nodes):
old_nodes.register_all()
old_nodes.mark_all()
dummy_nodes.register_all()
dummy_nodes.mark_all()
with catch_log_error():
settings.apply_theme_if_necessary()
# when a file is opened as a startup file update method of its trees is not called (Blender inconsistency??)
for tree in BlTrees().sv_main_trees:
tree.update()
def sv_post_load(scene):
"""
Upgrade nodes, apply preferences and do an update.
THe update order is next:
1. pre_load handler
2. update methods of trees in a file
3. post_load handler
post_load handler is also called when Blender is first ran
The method should remove throttling trees made in pre_load event,
initialize Sverchok parts which are required by loaded tree
and update all Sverchok trees
"""
from sverchok import node_tree, settings
# ensure current nodeview view scale / location parameters reflect users' system settings
node_tree.SverchCustomTree.update_gl_scale_info(None, "sv_post_load")
# register and mark old and dependent nodes
with catch_log_error():
if any(not n.is_registered_node_type() for ng in BlTrees().sv_trees
for n in ng.nodes):
old_nodes.register_all()
old_nodes.mark_all()
dummy_nodes.register_all()
dummy_nodes.mark_all()
with catch_log_error():
settings.apply_theme_if_necessary()
# release all trees and update them
set_first_run(False)
build_update_list()
process_tree()
def sv_update_handler(scene):
"""
Update sverchok node groups on frame change events.
"""
if not has_frame_changed(scene):
return
for ng in sverchok_trees():
with catch_log_error():
ng.process_ani()
def tree_event_loop(delay):
"""Sverchok event handler"""
with catch_log_error():
if NodesUpdater.is_running():
NodesUpdater.run_task()
elif NodesUpdater.has_task(
): # task should be run via timer only https://developer.blender.org/T82318#1053877
NodesUpdater.start_task()
NodesUpdater.run_task()
return delay
def init(self, context):
"""
this function is triggered upon node creation,
- delegates further initialization information to sv_init
"""
if self.sv_default_color:
self.use_custom_color = True
self.color = self.sv_default_color
with catch_log_error():
self.sv_init(context)
def sv_update_handler(scene):
"""
Update sverchok node groups on frame change events.
Jump from one frame to another: has_frame_changed=True, is_animation_playing=False
Scrubbing variant 1: has_frame_changed=True, is_animation_playing=True
Scrubbing variant 2(stop): has_frame_changed=True, is_animation_playing=False
Scrubbing variant 3: has_frame_changed=False, is_animation_playing=True
Scrubbing variant 4(stop): has_frame_changed=False, is_animation_playing=False
Playing animation: has_frame_changed=True, is_animation_playing=True
Playing animation(stop): has_frame_changed=False, is_animation_playing=False
"""
is_playing = bpy.context.screen.is_animation_playing
is_frame_changed = has_frame_changed(scene)
# print(f"Frame changed: {is_frame_changed}, Animation is playing: {is_playing}")
for ng in sverchok_trees(
): # Comparatively small overhead with 200 trees in a file
with catch_log_error():
ng.process_ani(is_frame_changed, is_playing)
def update_ui(self, group_nodes_path: List['SvGroupTreeNode']):
"""updating tree contextual information -> node colors, objects number in sockets, debugger nodes"""
self.handler.send(
GroupEvent(GroupEvent.EDIT_GROUP_NODE, group_nodes_path))
nodes_errors = self.handler.get_error_nodes(group_nodes_path)
to_show_update_time = group_nodes_path[0].id_data.sv_show_time_nodes
time_mode = group_nodes_path[0].id_data.show_time_mode
if to_show_update_time:
update_time = (
self.handler.get_cum_time(group_nodes_path)
if time_mode == "Cumulative" else
self.handler.get_nodes_update_time(group_nodes_path))
else:
update_time = cycle([None])
for node, error, update in zip(self.nodes, nodes_errors, update_time):
if hasattr(node, 'update_ui'):
node.update_ui(error, update,
NodeIdManager.extract_node_id(node))
# update debug nodes
if BlNode(node).is_debug_node:
with catch_log_error():
node.process()
def tree_event_loop(delay):
"""Sverchok tasks handler"""
with catch_log_error():
if tasks:
tasks.run()
return delay
