Add Brick "Set View" operator to change list hierarchy

- "System" as a root may need different logic since children of a system are not "subClasses" but rather "parts". Currently, "part" would be listed as attribute rather than a direct object in the group.

src/blenderbim/blenderbim/bim/module/brick/__init__.py

@@ -35,6 +35,7 @@ classes = (
     operator.ViewBrickItem,
     operator.SerializeBrick,
     operator.AddBrickNamespace,
+    operator.SetBrickListRoot,
     prop.Brick,
     prop.BIMBrickProperties,
     ui.BIM_PT_brickschema,

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

@@ -40,7 +40,8 @@ class LoadBrickProject(bpy.types.Operator, Operator):
     filter_glob: bpy.props.StringProperty(default="*.ttl", options={"HIDDEN"})
 
     def _execute(self, context):
-        core.load_brick_project(tool.Brick, filepath=self.filepath)
+        root = context.scene.BIMBrickProperties.brick_list_root
+        core.load_brick_project(tool.Brick, filepath=self.filepath, brick_root=root)
 
     def invoke(self, context, event):
         context.window_manager.fileselect_add(self)
@@ -180,7 +181,8 @@ class NewBrickFile(bpy.types.Operator):
         return {"FINISHED"}
 
     def _execute(self, context):
-        core.new_brick_file(tool.Brick)
+        root = context.scene.BIMBrickProperties.brick_list_root
+        core.new_brick_file(tool.Brick, brick_root=root)
 
     def rollback(self, data):
         BrickStore.purge()
@@ -252,3 +254,13 @@ class AddBrickNamespace(bpy.types.Operator, Operator):
         alias = props.new_brick_namespace_alias
         uri = props.new_brick_namespace_uri
         core.add_namespace(tool.Brick, alias=alias, uri=uri)
+
+
+class SetBrickListRoot(bpy.types.Operator, Operator):
+    bl_idname = "bim.set_brick_list_root"
+    bl_label = "Set Brick View Type"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def _execute(self, context):
+        root = context.scene.BIMBrickProperties.brick_list_root
+        core.set_brick_list_root(tool.Brick, brick_root=root)

src/blenderbim/blenderbim/bim/module/brick/prop.py

@@ -54,7 +54,7 @@ def get_brick_equipment_classes(self, context):
     return BrickschemaData.data["brick_equipment_classes"]
 
 
-def get_brick_view_types(self, context):
+def get_brick_roots(self, context):
     return [("System", "System", ""),
             ("Location", "Location", ""),
             ("Equipment", "Equipment", ""),
@@ -81,4 +81,4 @@ class BIMBrickProperties(PropertyGroup):
     new_brick_label: StringProperty(name="New Brick Label")
     new_brick_namespace_alias: StringProperty(name="New Brick Namespace Alias")
     new_brick_namespace_uri: StringProperty(name="New Brick Namespace URI")
-    brick_view_type: EnumProperty(name="Brick View Type", items=get_brick_view_types)
+    brick_list_root: EnumProperty(name="Brick List Root", items=get_brick_roots)

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

@@ -77,7 +77,8 @@ class BIM_PT_brickschema(Panel):
             row.operator("bim.add_brick_namespace", text="", icon="ADD")
 
             row = box.row(align=True)
-            row.prop(data=self.props, property="brick_view_type", text="List View")
+            row.operator("bim.set_brick_list_root", text="Set View")
+            row.prop(data=self.props, property="brick_list_root", text="")
 
         row = self.layout.row(align=True)
         row.label(text="Create Entity:")

src/blenderbim/blenderbim/core/brick.py

@@ -17,10 +17,10 @@
 # along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
 
 
-def load_brick_project(brick, filepath=None):
+def load_brick_project(brick, filepath=None, brick_root=None):
     brick.load_brick_file(filepath)
-    brick.import_brick_classes("Class")
-    brick.set_active_brick_class("Class")
+    brick.import_brick_classes(brick_root)
+    brick.set_active_brick_class(brick_root)
 
 
 def view_brick_class(brick, brick_class=None):
@@ -92,10 +92,10 @@ def convert_ifc_to_brick(brick, namespace=None, library=None):
     brick.run_refresh_brick_viewer()
 
 
-def new_brick_file(brick):
+def new_brick_file(brick, brick_root=None):
     brick.new_brick_file()
-    brick.import_brick_classes("Class")
-    brick.set_active_brick_class("Class")
+    brick.import_brick_classes(brick_root)
+    brick.set_active_brick_class(brick_root)
 
 
 def refresh_brick_viewer(brick):
@@ -118,3 +118,11 @@ def serialize_brick(brick):
 
 def add_namespace(brick, alias=None, uri=None):
     brick.add_namespace(alias, uri)
+
+
+def set_brick_list_root(brick, brick_root=None):
+    brick.clear_brick_browser()
+    brick.import_brick_classes(brick_root)
+    brick.set_active_brick_class(brick_root)
+    brick.clear_breadcrumbs()
+

src/blenderbim/blenderbim/tool/brick.py

@@ -326,6 +326,10 @@ class Brick(blenderbim.core.tool.Brick):
     def add_namespace(cls, alias, uri):
         BrickStore.graph.bind(alias, Namespace(uri))
         # need some way to reload namespace enum view
+    
+    @classmethod
+    def clear_breadcrumbs(cls):
+        bpy.context.scene.BIMBrickProperties.brick_breadcrumbs.clear()
 
 
 class BrickStore: