Execute only nodes connected to active Viewers

node_tree.py

@@ -35,6 +35,7 @@
 from bpy.props import StringProperty, BoolProperty, EnumProperty
 from bpy.types import NodeTree, NodeSocket
 
+from sverchok.core.update_system import SearchTree
 from sverchok.core.sv_custom_exceptions import SvNoDataError, DependencyError
 import sverchok.core.events as ev
 import sverchok.dependencies as sv_deps
@@ -227,6 +228,7 @@ def on_draft_mode_changed(self, context):
     def update(self):
         """This method is called if collection of nodes or links of the tree was changed"""
         handle_event(ev.TreeEvent(self))
+        self.disable_nodes()
 
     def force_update(self):
         """Update whole tree from scratch"""
@@ -251,6 +253,18 @@ def process_ani(self, frame_changed: bool, animation_playing: bool):
         """
         handle_event(ev.AnimationEvent(self, frame_changed, animation_playing))
 
+    def disable_nodes(self):
+        st = SearchTree(self)
+        active = []
+        for node in self.nodes:
+            if node.bl_idname in {"NodeReroute", "NodeFrame"}:
+                continue
+            node.set_temp_color('disable', (0.081, 0.081, 0.081))
+            if node.is_output and node.is_active:
+                active.append(node)
+        for node in st.nodes_to(active):
+            node.set_temp_color('disable')
+
 
 class UpdateNodes:
     """Everything related with update system of nodes"""
@@ -335,6 +349,19 @@ def refresh_node(self, context):
 
     ![image](https://user-images.githubusercontent.com/28003269/193507101-60a28c3f-50a1-4117-a66f-25b0b4e07e13.png)"""
 
+    def update_active(self, context):
+        self.id_data.disable_nodes()
+        self.process_node(context)
+
+    is_active: BoolProperty(
+        name='Live',
+        default=True,
+        update=update_active,
+        description="When enabled this will process incoming data",
+    )
+
+    is_output = False
+
     def sv_init(self, context):
         """
         This method will be called during node creation
@@ -460,11 +487,11 @@ def update_ui(self, error=None, update_time=None):
         # update error colors
         if error is not None:
             color = no_data_color if isinstance(error, SvNoDataError) else exception_color
-            self.set_temp_color(color)
+            self.set_temp_color('error', color)
             sv_bgl.draw_text(self, str(error), error_pref + self.node_id, color, 1.3, "UP")
         else:
             sv_bgl.callback_disable(error_pref + self.node_id)
-            self.set_temp_color()
+            self.set_temp_color('error')
 
         # show update timing
         if update_time is not None:
@@ -680,6 +707,10 @@ def draw_buttons(self, context, layout):
         use `SverchCustomTreeNode.sv_draw_buttons`."""
         if self.id_data.bl_idname == SverchCustomTree.bl_idname:
             row = layout.row(align=True)
+            if self.is_output:
+                row_ = row.row()
+                row_.ui_units_x = 1.5
+                row_.prop(self, 'is_active', toggle=True)
             if self.is_animation_dependent:
                 row.prop(self, 'is_animatable', icon='ANIM', icon_only=True)
             if self.is_scene_dependent:
@@ -700,6 +731,10 @@ def draw_buttons_ext(self, context, layout):
         on a property panel of the tree editor."""
         if self.id_data.bl_idname == SverchCustomTree.bl_idname:
             row = layout.row(align=True)
+            if self.is_output:
+                row_ = row.row()
+                row_.ui_units_x = 1.5
+                row_.prop(self, 'is_active', toggle=True)
             if self.is_animation_dependent:
                 row.prop(self, 'is_animatable', icon='ANIM')
             if self.is_scene_dependent:
@@ -752,24 +787,41 @@ def sv_default_color(self):
         """Returns default color of the node which can be changed in add-on settings."""
         return color_def.get_color(self.bl_idname)
 
-    def set_temp_color(self, color=None):
-        """This method memorize its initial color and override it with given one
-        if given color is None it tries to return its initial color or do nothing"""
+    def set_temp_color(self, color_name: str, color=None):
+        """This method memorize its initial color and override it with given one.
+        The node can keep several temporary colors simultaneously. It shows only
+        last temp color. When of a temp colors is removed (by colling the method
+        without color argument) it tries to show another temp color if available
+        otherwise it shows user color.
+
+        `color_name` is used to distinguish temp colors of different types
+        """
+        use_key = 'use_user_color'
+        color_key = 'user_color'
+        names_key = 'temp_colors'
+        if names_key not in self:
+            self[names_key] = dict()
 
+        # restore user or other tem color
         if color is None:
+            if color_name in self[names_key]:
+                del self[names_key][color_name]
+            if self[names_key]:  # there are other temp colors to show
+                self.color = list(self[names_key].values())[0]
             # looks like the node should return its initial color (user choice)
-            if 'user_color' in self:
-                self.use_custom_color = self['use_user_color']
-                del self['use_user_color']
-                self.color = self['user_color']
-                del self['user_color']
+            elif color_key in self:
+                self.use_custom_color = self[use_key]
+                del self[use_key]
+                self.color = self[color_key]
+                del self[color_key]
 
         # set temporary color
         else:
             # save overridden color (only once)
-            if 'user_color' not in self:
-                self['use_user_color'] = self.use_custom_color
-                self['user_color'] = self.color
+            if color_key not in self:
+                self[use_key] = self.use_custom_color
+                self[color_key] = self.color
+            self[names_key][color_name] = color
             self.use_custom_color = True
             self.color = color
 

nodes/exchange/gcode_exporter.py

@@ -55,6 +55,7 @@ class SvExportGcodeNode(SverchCustomTreeNode, bpy.types.Node):
     bl_idname = 'SvExportGcodeNode'
     bl_label = 'Export G-code'
     bl_icon = 'COPYDOWN'
+    is_output = True
 
     last_e: FloatProperty(name="Pull", default=5.0, min=0, soft_max=10)
     path_length: FloatProperty(name="Pull", default=5.0, min=0, soft_max=10)

nodes/logic/evolver.py

@@ -597,6 +597,7 @@ class SvEvolverNode(SverchCustomTreeNode, bpy.types.Node):
     bl_idname = 'SvEvolverNode'
     bl_label = 'Evolver'
     bl_icon = 'RNA'
+    is_output = True
 
     def props_changed(self, context):
         if self.node_id in evolver_mem:

nodes/object_nodes/armature_analyzer.py

@@ -25,6 +25,7 @@ class SvArmaturePropsNode(SverchCustomTreeNode, bpy.types.Node):
     bl_idname = 'SvArmaturePropsNode'
     bl_label = 'Armature Props'
     bl_icon = 'MOD_ARMATURE'
+    is_output = True
     is_scene_dependent = True
     is_animation_dependent = True
 

nodes/object_nodes/assign_materials.py

@@ -129,6 +129,7 @@ class SvAssignMaterialListNode(SverchCustomTreeNode, bpy.types.Node):
     bl_idname = 'SvAssignMaterialListNode'
     bl_label = "Assign Materials List"
     bl_icon = 'MATERIAL'
+    is_output = True
 
     @property
     def is_scene_dependent(self):

nodes/object_nodes/color_uv_texture.py

@@ -30,6 +30,7 @@ class SvMeshUVColorNode(SverchCustomTreeNode, bpy.types.Node):
     bl_idname = 'SvMeshUVColorNode'
     bl_label = 'Set UV Color'
     bl_icon = 'UV_DATA'
+    is_output = True
     is_scene_dependent = True
     is_animation_dependent = True
 

nodes/object_nodes/copy_modifiers.py

@@ -21,6 +21,7 @@ class SvCopyModifiersNode(SverchCustomTreeNode, bpy.types.Node):
     bl_idname = 'SvCopyModifiersNode'
     bl_label = 'Copy Modifiers'
     bl_icon = 'MODIFIER_DATA'
+    is_output = True
 
     @property
     def is_scene_dependent(self):

nodes/object_nodes/custom_mesh_normals.py

@@ -30,6 +30,7 @@ class SvSetCustomMeshNormals(SverchCustomTreeNode, bpy.types.Node):
     bl_label = 'Set Custom Normals'
     bl_icon = 'SNAP_NORMAL'
     sv_icon = 'SV_CUSTOM_NORMALS'
+    is_output = True
 
     @property
     def is_scene_dependent(self):

nodes/object_nodes/getsetprop_mk2.py

@@ -264,6 +264,7 @@ class SvSetPropNodeMK2(SverchCustomTreeNode, bpy.types.Node, SvPropNodeMixin):
     bl_label = 'Set Property MK2'
     bl_icon = 'FORCE_VORTEX'
     sv_icon = 'SV_PROP_SET'
+    is_output = True
 
     def local_updateNode(self, context):
         # no further interaction with the nodetree is required.
@@ -288,7 +289,7 @@ def execute_inside_throttle(self):
         if s_type == "SvVerticesSocket":
             inputs[0].use_prop = True
 
-    def draw_buttons(self, context, layout):
+    def sv_draw_buttons(self, context, layout):
         layout.alert = self.bad_prop
         layout.prop(self, "prop_name", text="")
 

nodes/object_nodes/lattice_analyzer.py

@@ -25,6 +25,7 @@ class SvLatticePropsNode(SverchCustomTreeNode, bpy.types.Node):
     bl_idname = 'SvLatticePropsNode'
     bl_label = 'Lattice Props'
     bl_icon = 'MOD_LATTICE'
+    is_output = True
     is_scene_dependent = True
     is_animation_dependent = True
 

nodes/object_nodes/material_index.py

@@ -35,6 +35,7 @@ class SvMaterialIndexNode(SverchCustomTreeNode, bpy.types.Node):
     bl_idname = 'SvMaterialIndexNode'
     bl_label = "Set Material Index"
     bl_icon = 'MATERIAL'
+    is_output = True
 
     @property
     def is_scene_dependent(self):

nodes/object_nodes/sculpt_mask.py

@@ -28,6 +28,7 @@ class SvSculptMaskNode(SverchCustomTreeNode, bpy.types.Node):
     bl_idname = 'SvSculptMaskNode'
     bl_label = 'Vertex Sculpt Masking'
     bl_icon = 'SCULPTMODE_HLT'
+    is_output = True
 
     def sv_init(self, context):
         self.inputs.new('SvObjectSocket', "Object")

nodes/object_nodes/select_mesh_verts.py

@@ -29,6 +29,7 @@ class SvSelectMeshVerts(SverchCustomTreeNode, bpy.types.Node):
     bl_idname = 'SvSelectMeshVerts'
     bl_label = 'Select Object Vertices'
     bl_icon = 'EDITMODE_HLT'
+    is_output = True
     is_animation_dependent = True
     is_scene_dependent = True
 

nodes/object_nodes/set_blenddata2.py

@@ -39,6 +39,7 @@ class SvSetDataObjectNodeMK2(SverchCustomTreeNode, bpy.types.Node):
     bl_label = 'Object ID Set MK2'
     bl_icon = 'OUTLINER_OB_EMPTY'
     sv_icon = 'SV_OBJECT_ID_SET'
+    is_output = True
     is_scene_dependent = True
     is_animation_dependent = True
 

nodes/object_nodes/set_collection.py

@@ -80,6 +80,7 @@ class SvSetCollection(SverchCustomTreeNode, bpy.types.Node):
     bl_idname = 'SvSetCollection'
     bl_label = 'Set Collection'
     bl_icon = 'OUTLINER_COLLECTION'
+    is_output = True
 
     collection: bpy.props.PointerProperty(type=bpy.types.Collection, update=updateNode)
     last_objects: bpy.props.CollectionProperty(type=SvObjectsWithCollections)
@@ -93,7 +94,7 @@ def sv_copy(self, original):
         # new node new history
         self.last_objects.clear()
 
-    def draw_buttons(self, context, layout):
+    def sv_draw_buttons(self, context, layout):
         layout.operator('node.sv_unlink_from_other_collections', text="Unlink others", icon='UNLINKED')
 
     def process(self):

nodes/object_nodes/set_custom_uv_map.py

@@ -77,6 +77,7 @@ class SvSetCustomUVMap(SverchCustomTreeNode, bpy.types.Node):
     bl_idname = 'SvSetCustomUVMap'
     bl_label = 'Set Custom UV Map'
     bl_icon = 'GROUP_UVS'
+    is_output = True
 
     @property
     def is_scene_dependent(self):

nodes/object_nodes/set_loop_normals.py

@@ -23,11 +23,12 @@ class SvSetLoopNormalsNode(SverchCustomTreeNode, bpy.types.Node):
     bl_idname = 'SvSetLoopNormalsNode'
     bl_label = 'Set Loop Normals'
     bl_icon = 'NORMALS_VERTEX'
+    is_output = True
 
     normalize: bpy.props.BoolProperty(name="Normalize", default=True, description="Normalize input normals",
                                       update=updateNode)
 
-    def draw_buttons(self, context, layout):
+    def sv_draw_buttons(self, context, layout):
         layout.prop(self, 'normalize')
 
     def sv_init(self, context):

nodes/object_nodes/set_mesh_attribute.py

@@ -81,6 +81,7 @@ class SvSetMeshAttributeNode(SverchCustomTreeNode, bpy.types.Node):
     bl_idname = 'SvSetMeshAttributeNode'
     bl_label = 'Set Mesh Attribute'
     bl_icon = 'SORTALPHA'
+    is_output = True
 
     def update_type(self, context):
         self.inputs['Value'].hide_safe = self.value_type not in ['FLOAT', 'INT', 'BOOLEAN']
@@ -96,7 +97,7 @@ def update_type(self, context):
     value_type: bpy.props.EnumProperty(items=[(i, i.capitalize(), '') for i in value_types], update=update_type)
     last_objects: bpy.props.CollectionProperty(type=SvObjectsWithAttributes)
 
-    def draw_buttons(self, context, layout):
+    def sv_draw_buttons(self, context, layout):
         layout.prop(self, 'domain', text='Domain')
         layout.prop(self, 'value_type', text='Type')
 

nodes/object_nodes/vertex_colors_mk3.py

@@ -87,6 +87,7 @@ class SvVertexColorNodeMK3(SverchCustomTreeNode, bpy.types.Node):
     bl_idname = 'SvVertexColorNodeMK3'
     bl_label = 'Vertex Color MK3'
     bl_icon = 'COLOR'
+    is_output = True
 
     modes = [
         ("vertices", "Vert", "Vcol - color per vertex", 1),
@@ -117,7 +118,7 @@ class SvVertexColorNodeMK3(SverchCustomTreeNode, bpy.types.Node):
         default="RGBA", update=updateNode)
 
 
-    def draw_buttons(self, context, layout):
+    def sv_draw_buttons(self, context, layout):
         layout.prop(self, 'use_active')
         layout.prop(self, 'vertex_color')
         layout.prop(self, "mode", expand=True)

nodes/object_nodes/weightsmk2.py

@@ -29,6 +29,7 @@ class SvVertexGroupNodeMK2(SverchCustomTreeNode, bpy.types.Node):
     bl_label = 'Vertex Group Weights'
     bl_icon = 'OUTLINER_OB_EMPTY'
     sv_icon = 'SV_VERTEX_WEIGHT'
+    is_output = True
     is_animation_dependent = True
     is_scene_dependent = True
 

nodes/scene/node_remote_mk2.py

@@ -56,11 +56,12 @@ class SvNodeRemoteNodeMK2(SverchCustomTreeNode, bpy.types.Node):
     bl_label = 'Node Remote (Control)+'
     bl_icon = 'OUTLINER_OB_EMPTY'
     sv_icon = 'SV_REMOTE_NODE'
+    is_output = True
 
     activate: BoolProperty(
         default=True,
         name='Show', description='Activate node?',
-        update=updateNode)
+        update=lambda s, c: setattr(s, 'is_active', s.activate))
 
     nodegroup_name: StringProperty(
         default='',

nodes/scene/obj_remote_mk2.py

@@ -29,15 +29,13 @@ class SvObjRemoteNodeMK2(SverchCustomTreeNode, bpy.types.Node):
     bl_label = 'Object Remote (Control) MK2'
     bl_icon = 'OUTLINER_OB_EMPTY'
     sv_icon = 'SV_REMOTE_OBJECT'
+    is_output = True
 
     def sv_init(self, context):
         self.inputs.new('SvMatrixSocket', 'matrices')
         self.inputs.new('SvObjectSocket', 'objects')
         self.outputs.new('SvObjectSocket', 'objects')
 
-    def draw_buttons(self, context, layout):
-        pass
-
     def process(self):
         if not self.inputs[1] and not self.inputs[1].is_linked:
             return

nodes/scene/particles_MK2.py

@@ -28,6 +28,7 @@ class SvParticlesMK2Node(SverchCustomTreeNode, bpy.types.Node):
     bl_idname = 'SvParticlesMK2Node'
     bl_label = 'Particles MK2'
     bl_icon = 'PARTICLES'
+    is_output = True
     is_animation_dependent = True
     is_scene_dependent = True
 

nodes/solid/solid_viewer.py

@@ -257,6 +257,7 @@ class SvSolidViewerNode(SverchCustomTreeNode, bpy.types.Node):
     sv_icon = 'SV_DRAW_VIEWER'
     sv_category = "Solid Outputs"
     sv_dependencies = {'FreeCAD'}
+    is_output = True
     node_dict = {}
 
     def wrapped_update(self, context=None):
@@ -265,7 +266,11 @@ def wrapped_update(self, context=None):
             self.process_node(context)
 
     #n_id: StringProperty(default='')
-    activate: BoolProperty(name='Show', description='Activate', default=True, update=updateNode)
+    activate: BoolProperty(
+        name='Show',
+        description='Activate',
+        default=True,
+        update=lambda s, c: setattr(s, 'is_active', s.activate))
 
     vert_color: FloatVectorProperty(
         subtype='COLOR', min=0, max=1, default=(0.8, 0.8, 0.8, 1.0),