Move pset definitions into a property group and create a UI for it

src/ifcblenderexport/io_export_ifc/__init__.py

@@ -32,6 +32,8 @@ classes = (
     operator.AssignSweptSolidProfile,
     operator.AssignSweptSolidExtrusion,
     operator.AssignPset,
+    operator.UnassignPset,
+    operator.AddPset,
     operator.RemovePset,
     operator.GenerateGlobalId,
     operator.AddAttribute,
@@ -39,6 +41,7 @@ classes = (
     operator.QuickProjectSetup,
     ui.BIMProperties,
     ui.Attribute,
+    ui.Pset,
     ui.ObjectProperties,
     ui.MaterialProperties,
     ui.MeshProperties,

src/ifcblenderexport/io_export_ifc/export_ifc.py

@@ -271,11 +271,12 @@ class IfcParser():
         if object.name in self.qtos:
             self.rel_defines_by_qto.setdefault(object.name, []).append(product)
 
+        for pset in object.ObjectProperties.psets:
+            self.rel_defines_by_pset.setdefault(
+                '{}/{}'.format(pset.name, pset.file), []).append(product)
+
         for key in object.keys():
-            if key[0:5] == 'Pset_':
-                self.rel_defines_by_pset.setdefault(
-                    '{}/{}'.format(key, object[key]), []).append(product)
-            elif key[0:3] == 'Doc':
+            if key[0:3] == 'Doc':
                 self.rel_associates_document_object.setdefault(
                     object[key], []).append(product)
             elif key[0:5] == 'Class':
@@ -651,8 +652,8 @@ class IfcParser():
                         'location': object.location,
                         'up_axis': object.matrix_world.to_quaternion() @ Vector((0, 0, 1)),
                         'forward_axis': object.matrix_world.to_quaternion() @ Vector((1, 0, 0)),
-                        'psets': ['{}/{}'.format(key, object[key]) for key in
-                            object.keys() if key[0:5] == 'Pset_'],
+                        'psets': ['{}/{}'.format(pset.name, pset.file) for pset in
+                            object.ObjectProperties.psets],
                         'class': self.get_ifc_class(object.name),
                         'representations': self.get_object_representation_names(object),
                         'attributes': self.get_object_attributes(object)

src/ifcblenderexport/io_export_ifc/operator.py

@@ -228,17 +228,42 @@ class AssignPset(bpy.types.Operator):
 
     def execute(self, context):
         for object in bpy.context.selected_objects:
-            object[bpy.context.scene.BIMProperties.pset_name] = bpy.context.scene.BIMProperties.pset_file
+            index = object.ObjectProperties.psets.find(bpy.context.scene.BIMProperties.pset_name)
+            if index >= 0:
+                global_id = object.ObjectProperties.psets[index]
+            else:
+                global_id = object.ObjectProperties.psets.add()
+            global_id.name = bpy.context.scene.BIMProperties.pset_name
+            global_id.file = bpy.context.scene.BIMProperties.pset_file
+        return {'FINISHED'}
+
+class UnassignPset(bpy.types.Operator):
+    bl_idname = 'bim.unassign_pset'
+    bl_label = 'Unassign Pset'
+
+    def execute(self, context):
+        for object in bpy.context.selected_objects:
+            index = object.ObjectProperties.psets.find(bpy.context.scene.BIMProperties.pset_name)
+            if index != -1:
+                object.ObjectProperties.psets.remove(index)
+        return {'FINISHED'}
+
+class AddPset(bpy.types.Operator):
+    bl_idname = 'bim.add_pset'
+    bl_label = 'Add Pset'
+
+    # This is a temporary measure until we get a better UI
+    def execute(self, context):
+        bpy.context.active_object.ObjectProperties.psets.add()
         return {'FINISHED'}
 
 class RemovePset(bpy.types.Operator):
     bl_idname = 'bim.remove_pset'
     bl_label = 'Remove Pset'
+    pset_index: bpy.props.IntProperty()
 
     def execute(self, context):
-        for object in bpy.context.selected_objects:
-            if bpy.context.scene.BIMProperties.pset_name in object.keys():
-                del(object[bpy.context.scene.BIMProperties.pset_name])
+        bpy.context.active_object.ObjectProperties.psets.remove(self.pset_index)
         return {'FINISHED'}
 
 class GenerateGlobalId(bpy.types.Operator):
@@ -246,12 +271,10 @@ class GenerateGlobalId(bpy.types.Operator):
     bl_label = 'Generate GlobalId'
 
     def execute(self, context):
-        global_id = None
-        for attribute in bpy.context.active_object.ObjectProperties.attributes:
-            if attribute.name == 'GlobalId':
-                global_id = attribute
-                break
-        if not global_id:
+        index = bpy.context.active_object.ObjectProperties.attributes.find('GlobalId')
+        if index >= 0:
+            global_id = bpy.context.active_object.ObjectProperties.attributes[index]
+        else:
             global_id = bpy.context.active_object.ObjectProperties.attributes.add()
         global_id.name = 'GlobalId'
         global_id.data_type = 'string'

src/ifcblenderexport/io_export_ifc/ui.py

@@ -55,8 +55,13 @@ class Attribute(bpy.types.PropertyGroup):
     int_value: bpy.props.IntProperty(name="Value")
     float_value: bpy.props.FloatProperty(name="Value")
 
+class Pset(bpy.types.PropertyGroup):
+    name: bpy.props.StringProperty(name="Name")
+    file: bpy.props.StringProperty(name="File")
+
 class ObjectProperties(bpy.types.PropertyGroup):
     attributes: bpy.props.CollectionProperty(name="Attributes", type=Attribute)
+    psets: bpy.props.CollectionProperty(name="Psets", type=Pset)
 
 class MaterialProperties(bpy.types.PropertyGroup):
     is_external: bpy.props.BoolProperty(name="Has External Definition")
@@ -96,6 +101,19 @@ class ObjectPanel(bpy.types.Panel):
         row = layout.row()
         row.prop(bpy.context.active_object.ObjectProperties, 'attributes')
 
+        layout.label(text="Property Sets:")
+        row = layout.row()
+        row.operator('bim.add_pset')
+
+        for index, pset in enumerate(bpy.context.active_object.ObjectProperties.psets):
+            row = layout.row(align=True)
+            row.prop(pset, 'name', text='')
+            row.prop(pset, 'file', text='')
+            row.operator('bim.remove_pset', icon='CANCEL', text='').pset_index = index
+
+        row = layout.row()
+        row.prop(bpy.context.active_object.ObjectProperties, 'psets')
+
 class MeshPanel(bpy.types.Panel):
     bl_label = 'IFC Representations'
     bl_idname = 'BIM_PT_mesh'
@@ -187,7 +205,7 @@ class BIMPanel(bpy.types.Panel):
 
         row = layout.row(align=True)
         row.operator("bim.assign_pset")
-        row.operator("bim.remove_pset")
+        row.operator("bim.unassign_pset")
 
         layout.label(text="Quality Auditing:")