added UI to display connections for realizing elements

Example - https://imgur.com/a/1ZZlTwp

src/blenderbim/blenderbim/bim/module/geometry/data.py

@@ -97,7 +97,7 @@ class ConnectionsData:
 
     @classmethod
     def load(cls):
-        cls.data = {"connections": cls.connections()}
+        cls.data = {"connections": cls.connections(), "is_connection_realization": cls.is_connection_realization()}
         cls.is_loaded = True
 
     @classmethod
@@ -132,7 +132,7 @@ class ConnectionsData:
                     "Name": related_element.Name or "Unnamed",
                     "ConnectionType": related_element_connection_type,
                     "realizing_elements": realizing_elements,
-                    "realizing_elements_connection_type": realizing_elements_connection_type
+                    "realizing_elements_connection_type": realizing_elements_connection_type,
                 }
             )
 
@@ -160,12 +160,29 @@ class ConnectionsData:
                     "Name": relating_element.Name or "Unnamed",
                     "ConnectionType": relating_element_connection_type,
                     "realizing_elements": realizing_elements,
-                    "realizing_elements_connection_type": realizing_elements_connection_type
+                    "realizing_elements_connection_type": realizing_elements_connection_type,
                 }
             )
 
         return results
 
+    @classmethod
+    def is_connection_realization(cls):
+        element = tool.Ifc.get_entity(bpy.context.active_object)
+        connections = element.IsConnectionRealization
+        if not connections:
+            return
+
+        results = []
+        for rel in connections:
+            data = {
+                "realizing_elements_connection_type": rel.ConnectionType,
+                "connected_from": rel.RelatingElement,
+                "connected_to": rel.RelatedElement,
+            }
+            results.append(data)
+        return results
+
 
 class DerivedPlacementsData:
     data = {}

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

@@ -134,7 +134,7 @@ class BIM_PT_connections(Panel):
         layout = self.layout
         props = context.active_object.BIMObjectProperties
 
-        if not ConnectionsData.data["connections"]:
+        if not ConnectionsData.data["connections"] and not ConnectionsData.data["is_connection_realization"]:
             layout.label(text="No connections found")
 
         for connection in ConnectionsData.data["connections"]:
@@ -151,14 +151,38 @@ class BIM_PT_connections(Panel):
                 connection_type = connection["realizing_elements_connection_type"]
                 connection_type = f" ({connection_type})" if connection_type else ""
                 row.label(text=f"Realizing elements{connection_type}:")
-                
+
                 for element in connection["realizing_elements"]:
                     row = self.layout.row(align=True)
                     obj = tool.Ifc.get_object(element)
+                    row.operator("bim.select_entity", text="", icon="RESTRICT_SELECT_OFF").ifc_id = element.id()
                     row.label(text=obj.name)
-                    row.operator(
-                        "bim.select_entity", text="", icon="RESTRICT_SELECT_OFF"
-                    ).ifc_id = element.id()
+
+        # display connections where element is connection realization
+        connections = ConnectionsData.data["is_connection_realization"]
+        if not connections:
+            return
+
+        row = self.layout.row(align=True)
+        row.label(text="Element is connections realization:")
+        for connection in connections:
+            # NOTE: not displayed yet
+            connection_type = connection["realizing_elements_connection_type"]
+            connection_type = f" ({connection_type})" if connection_type else ""
+
+            row = self.layout.row(align=True)
+
+            connected_from = connection["connected_from"]
+            obj = tool.Ifc.get_object(connected_from)
+            row.operator("bim.select_entity", text="", icon="RESTRICT_SELECT_OFF").ifc_id = connected_from.id()
+            row.label(text=obj.name)
+
+            row.label(text="", icon="FORWARD")
+
+            connected_to = connection["connected_to"]
+            obj = tool.Ifc.get_object(connected_to)
+            row.operator("bim.select_entity", text="", icon="RESTRICT_SELECT_OFF").ifc_id = connected_to.id()
+            row.label(text=obj.name)
 
 
 class BIM_PT_mesh(Panel):