Implement BCF related topics

src/ifcblenderexport/blenderbim/__init__.py

@@ -35,6 +35,7 @@ if bpy is not None:
         operator.SelectType,
         operator.SelectBcfFile,
         operator.GetBcfTopics,
+        operator.ViewBcfTopic,
         operator.ActivateBcfViewpoint,
         operator.OpenBcfReferenceLink,
         operator.OpenBcfBimSnippetSchema,
@@ -113,6 +114,7 @@ if bpy is not None:
         prop.BcfTopicLabel,
         prop.BcfTopicLink,
         prop.BcfTopicDocumentReference,
+        prop.BcfTopicRelatedTopic,
         prop.Subcontext,
         prop.BIMProperties,
         prop.BCFProperties,

src/ifcblenderexport/blenderbim/operator.py

@@ -404,6 +404,18 @@ class GetBcfTopics(bpy.types.Operator):
         return {'FINISHED'}
 
 
+class ViewBcfTopic(bpy.types.Operator):
+    bl_idname = 'bim.view_bcf_topic'
+    bl_label = 'Get BCF Topic'
+    topic_guid: bpy.props.StringProperty()
+
+    def execute(self, context):
+        for index, topic in enumerate(bcf.BcfStore.topics):
+            if str(topic[1].xmlId) == self.topic_guid:
+                bpy.context.scene.BCFProperties.active_topic_index = index
+        return {'FINISHED'}
+
+
 class ActivateBcfViewpoint(bpy.types.Operator):
     bl_idname = 'bim.activate_bcf_viewpoint'
     bl_label = 'Activate BCF Viewpoint'
@@ -411,7 +423,7 @@ class ActivateBcfViewpoint(bpy.types.Operator):
     def execute(self, context):
         import bcfplugin
 
-        topics = bcfplugin.getTopics()
+        topics = bcf.BcfStore.topics
         if not topics:
             return {'FINISHED'}
         topic = topics[bpy.context.scene.BCFProperties.active_topic_index][1]

src/ifcblenderexport/blenderbim/prop.py

@@ -379,6 +379,11 @@ class BcfTopicDocumentReference(PropertyGroup):
     is_external: BoolProperty(name='Is External')
 
 
+class BcfTopicRelatedTopic(PropertyGroup):
+    name: StringProperty(name='Name')
+    guid: StringProperty(name='GUID')
+
+
 def refreshBcfTopic(self, context):
     global bcfviewpoints_enum
     import bcfplugin
@@ -444,6 +449,14 @@ def refreshBcfTopic(self, context):
         new.guid = str(doc.guid)
         new.is_external = doc.external
 
+    # Load related topics
+    while len(props.topic_related_topics) > 0:
+        props.topic_related_topics.remove(0)
+    for t in topic.relatedTopics:
+        new = props.topic_related_topics.add()
+        new.name = bcfplugin.getTopicFromUUID(t.value).title
+        new.guid = str(t.value)
+
     # Load viewpoints
     bcfviewpoints_enum.clear()
     viewpoints = bcfplugin.getViewpoints(topic)
@@ -558,6 +571,7 @@ class BCFProperties(PropertyGroup):
     topic_snippet_type: StringProperty(name='BIM Snippet Type')
     topic_snippet_is_external: BoolProperty(name='Is BIM Snippet External')
     topic_document_references: CollectionProperty(name='BCF Topic Document References', type=BcfTopicDocumentReference)
+    topic_related_topics: CollectionProperty(name='BCF Topic Related Topics', type=BcfTopicRelatedTopic)
 
 
 class MapConversion(PropertyGroup):

src/ifcblenderexport/blenderbim/ui.py

@@ -613,6 +613,11 @@ class BIM_PT_bcf(Panel):
                 row.operator('bim.open_bcf_document_reference', icon='FILE_FOLDER', text='').data = '{}/{}'.format(
                         props.topic_guid, index)
 
+        layout.label(text="Related Topics:")
+        for topic in props.topic_related_topics:
+            row = layout.row(align=True)
+            row.operator('bim.view_bcf_topic', text=topic.name).topic_guid = topic.guid
+
 
 class BIM_PT_qa(Panel):
     bl_label = "BIMTester Quality Auditing"