Prevent using pset operators when no template available

src/blenderbim/blenderbim/bim/module/pset_template/operator.py

@@ -21,7 +21,11 @@ import ifcopenshell
 import ifcopenshell.api
 import blenderbim.bim.schema
 import blenderbim.bim.handler
-from blenderbim.bim.module.pset_template.prop import updatePsetTemplateFiles, updatePsetTemplates
+from blenderbim.bim.module.pset_template.prop import (
+    updatePsetTemplateFiles, 
+    updatePsetTemplates,
+    getPsetTemplates
+)
 from ifcopenshell.api.pset_template.data import Data
 from blenderbim.bim.ifc import IfcStore
 
@@ -59,6 +63,11 @@ class RemovePsetTemplate(bpy.types.Operator):
     bl_label = "Remove Pset Template"
     bl_options = {"REGISTER", "UNDO"}
 
+    @classmethod
+    def poll(cls, context):
+        props = context.scene.BIMPsetTemplateProperties
+        return bool(getPsetTemplates(props, context))
+
     def execute(self, context):
         IfcStore.begin_transaction(self)
         IfcStore.pset_template_file.begin_transaction()
@@ -93,6 +102,11 @@ class EnableEditingPsetTemplate(bpy.types.Operator):
     bl_label = "Enable Editing Pset Template"
     bl_options = {"REGISTER", "UNDO"}
 
+    @classmethod
+    def poll(cls, context):
+        props = context.scene.BIMPsetTemplateProperties
+        return bool(getPsetTemplates(props, context))
+
     def execute(self, context):
         props = context.scene.BIMPsetTemplateProperties
         props.active_pset_template_id = int(props.pset_templates)

src/blenderbim/blenderbim/bim/module/pset_template/ui.py

@@ -19,6 +19,9 @@
 import bpy
 from bpy.types import Panel
 from blenderbim.bim.ifc import IfcStore
+from blenderbim.bim.module.pset_template.prop import (
+    getPsetTemplates,
+)
 from ifcopenshell.api.pset_template.data import Data
 
 
@@ -40,7 +43,7 @@ class BIM_PT_pset_template(Panel):
 
         row = layout.row(align=True)
 
-        if props.pset_templates:
+        if bool(getPsetTemplates(props, context)):
             row.prop(props, "pset_templates", text="", icon="COPY_ID")
         else:
             row.label(text="No Pset Templates", icon="COPY_ID")