bcf bonsai - create bcf v3 projects and display loaded bcf version

Example - https://imgur.com/a/3ZSGtw7

src/bonsai/bonsai/bim/module/bcf/bcfstore.py

@@ -46,7 +46,15 @@ class BcfStore:
     @classmethod
     def set(cls, bcfxml: Union[bcf.bcfxml.BcfXml, None], filepath: str) -> None:
         cls.bcfxml = bcfxml
-        bpy.context.scene.BCFProperties.bcf_file = filepath
+        props = bpy.context.scene.BCFProperties
+        props.bcf_file = filepath
+
+        # Set bcf_version prop on load.
+        if filepath or bcfxml:
+            bcfxml = cls.get_bcfxml()
+            assert bcfxml
+            bcf_v2 = (bcfxml.version.version_id or "").startswith("2")
+            props.bcf_version = "2" if bcf_v2 else "3"
 
     @classmethod
     def set_by_filepath(cls, filepath: str) -> None:

src/bonsai/bonsai/bim/module/bcf/operator.py

@@ -55,7 +55,10 @@ class NewBcfProject(bpy.types.Operator):
     bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
-        bcfxml = bcf.v2.bcfxml.BcfXml.create_new("New Project")
+        props = context.scene.BCFProperties
+        bcf_v2 = props.bcf_version == "2"
+        bcf_class = bcf.v2.bcfxml.BcfXml if bcf_v2 else bcf.v3.bcfxml.BcfXml
+        bcfxml = bcf_class.create_new("New Project")
         bcfstore.BcfStore.set(bcfxml, "")
         bpy.ops.bim.load_bcf_project()
         return {"FINISHED"}
@@ -65,12 +68,14 @@ class LoadBcfProject(bpy.types.Operator):
     bl_idname = "bim.load_bcf_project"
     bl_label = "Load BCF Project"
     bl_options = {"REGISTER", "UNDO"}
-    filepath: bpy.props.StringProperty(subtype="FILE_PATH")
+    filepath: bpy.props.StringProperty(subtype="FILE_PATH", options={"SKIP_SAVE"})
     filter_glob: bpy.props.StringProperty(default="*.bcf;*.bcfzip", options={"HIDDEN"})
 
     def execute(self, context):
+        # Operator is also used when new project is created by not yet saved.
         if self.filepath:
             bcfstore.BcfStore.set_by_filepath(self.filepath)
+
         bcfxml = bcfstore.BcfStore.get_bcfxml()
         assert bcfxml
         bcf_v2 = (bcfxml.version.version_id or "").startswith("2")

src/bonsai/bonsai/bim/module/bcf/prop.py

@@ -201,6 +201,12 @@ def get_related_topics(self: "BCFProperties", context: bpy.types.Context) -> lis
 
 class BCFProperties(PropertyGroup):
     bcf_file: StringProperty(name="BCF File")
+    bcf_version: EnumProperty(
+        name="BCF Version",
+        description="Currently loaded BCF project version / BCF version to use for created projects",
+        items=[("2", "v2.1", ""), ("3", "v3.0", "")],
+        default="3",
+    )
     comment_text_width: IntProperty(name="Comment Text Width", default=40)
     name: StringProperty(default="", name="Project Name", update=updateBcfProjectName)
     author: StringProperty(

src/bonsai/bonsai/bim/module/bcf/ui.py

@@ -44,6 +44,7 @@ class BIM_PT_bcf(Panel):
             row = layout.row(align=True)
             row.operator("bim.new_bcf_project", text="New Project")
             row.operator("bim.load_bcf_project", text="Load Project")
+            layout.prop(props, "bcf_version")
             return
 
         row = layout.row(align=True)
@@ -52,6 +53,10 @@ class BIM_PT_bcf(Panel):
         row.operator("bim.save_bcf_project", icon="EXPORT", text="Save Project As...")
         row.operator("bim.unload_bcf_project", text="", icon="CANCEL")
 
+        row = layout.row()
+        row.prop(props, "bcf_version", emboss=False)
+        row.enabled = False
+
         row = layout.row()
         row.prop(props, "name")