I'm writing an addon which allows for custom node sockets to be added to the inputs and outputs of node groups.
bl_space_type = 'NODE_EDITOR'
bl_region_type = 'UI'
With these tags, the panel appears in the shader node editor as wanted, but I would prefer to have the panel only display while editing a custom group, like the built-in panel for editing custom groups' sockets. How would I go about doing that?
Use poll() to check whether the panel can be drawn.
API: https://docs.blender.org/api/current/bpy.types.Panel.html#bpy.types.Panel.poll
import bpy
from bpy.types import Panel
class NODE_PT_custom_panel(Panel):
bl_space_type = 'NODE_EDITOR'
bl_region_type = 'UI'
bl_category = "Custom"
bl_label = "Layout"
@classmethod
def poll(cls, context):
snode = context.space_data
if snode is None:
return False
tree = snode.edit_tree
if tree is None:
return False
if tree.is_embedded_data:
return False
return True
def draw(self, context):
layout = self.layout
layout.label(text='Hello World')
def register():
bpy.utils.register_class(NODE_PT_custom_panel)
def unregister():
bpy.utils.unregister_class(NODE_PT_custom_panel)
if __name__ == "__main__":
register()
edit_tree is the current node_tree
$\endgroup$