You can now copy cost values from one cost item to another

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

@@ -30,6 +30,7 @@ classes = (
     operator.RemoveCostItemQuantity,
     operator.AddCostValue,
     operator.RemoveCostItemValue,
+    operator.CopyCostItemValues,
     prop.CostItem,
     prop.BIMCostProperties,
     ui.BIM_PT_cost_schedules,

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

@@ -458,11 +458,7 @@ class RemoveCostItemValue(bpy.types.Operator):
 
     def execute(self, context):
         self.file = IfcStore.get_file()
-        ifcopenshell.api.run(
+        ifcopenshell.api.run("cost.remove_cost_item_value", self.file, cost_value=self.file.by_id(self.cost_value))
-            "cost.remove_cost_item_value",
-            self.file,
-            cost_value=self.file.by_id(self.cost_value),
-        )
         Data.load(self.file)
         return {"FINISHED"}
 
@@ -519,3 +515,20 @@ class EditCostValue(bpy.types.Operator):
         Data.load(IfcStore.get_file())
         bpy.ops.bim.disable_editing_cost_item_value()
         return {"FINISHED"}
+
+
+class CopyCostItemValues(bpy.types.Operator):
+    bl_idname = "bim.copy_cost_item_values"
+    bl_label = "Copy Cost Item Values"
+    source: bpy.props.IntProperty()
+    destination: bpy.props.IntProperty()
+
+    def execute(self, context):
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run(
+            "cost.copy_cost_item_values",
+            self.file,
+            **{"source": self.file.by_id(self.source), "destination": self.file.by_id(self.destination)},
+        )
+        Data.load(IfcStore.get_file())
+        return {"FINISHED"}

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

@@ -260,9 +260,14 @@ class BIM_UL_cost_items(UIList):
                     op.cost_item = item.ifc_definition_id
 
             if props.active_cost_item_id == item.ifc_definition_id:
-                row.operator("bim.edit_cost_item", text="", icon="CHECKMARK")
+                if props.cost_item_editing_type == "ATTRIBUTES":
+                    row.operator("bim.edit_cost_item", text="", icon="CHECKMARK")
                 row.operator("bim.disable_editing_cost_item", text="", icon="CANCEL")
             elif props.active_cost_item_id:
+                if props.cost_item_editing_type == "VALUES":
+                    op = row.operator("bim.copy_cost_item_values", text="", icon="COPYDOWN")
+                    op.source = props.active_cost_item_id
+                    op.destination = item.ifc_definition_id
                 row.operator("bim.add_cost_item", text="", icon="ADD").cost_item = item.ifc_definition_id
                 row.operator("bim.remove_cost_item", text="", icon="X").cost_item = item.ifc_definition_id
             else:

src/ifcopenshell-python/ifcopenshell/api/cost/copy_cost_item_values.py

@@ -0,0 +1,17 @@
+import ifcopenshell.util.element
+
+
+class Usecase:
+    def __init__(self, file, **settings):
+        self.file = file
+        self.settings = {"source": None, "destination": None}
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        for cost_value in self.settings["destination"].CostValues or []:
+            ifcopenshell.api.run("cost.remove_cost_item_value", self.file, cost_value=cost_value)
+        copied_cost_values = []
+        for cost_value in self.settings["source"].CostValues or []:
+            copied_cost_values.append(ifcopenshell.util.element.copy_deep(self.file, cost_value))
+        self.settings["destination"].CostValues = copied_cost_values