Fix [#34023] r54146 breaks name-display of default "UI_UL_list"

draw_item *is* optional (it then uses default C function), even though there is not much sense to register a class without it, except for our default UI_UL_list!

diff --git a/release/scripts/startup/bl_ui/__init__.py b/release/scripts/startup/bl_ui/__init__.py
index 3bb19a4..982c723 100644 (file)
--- a/release/scripts/startup/bl_ui/__init__.py
+++ b/release/scripts/startup/bl_ui/__init__.py
@@ -138,7 +138,6 @@ def unregister():
 
 # Define a default UIList, when a list does not need any custom drawing...
 class UI_UL_list(bpy.types.UIList):
-    def draw_item(self, context, layout, data, item, icon, active_data, active_propname, index):
-        pass
+    pass
 
 bpy.utils.register_class(UI_UL_list)

diff --git a/source/blender/makesrna/intern/rna_ui.c b/source/blender/makesrna/intern/rna_ui.c
index f3921b2..e5585b4 100644 (file)
--- a/source/blender/makesrna/intern/rna_ui.c
+++ b/source/blender/makesrna/intern/rna_ui.c
@@ -863,7 +863,7 @@ static void rna_def_uilist(BlenderRNA *brna)
        func = RNA_def_function(srna, "draw_item", NULL);
        RNA_def_function_ui_description(func, "Draw an item in the list (NOTE: when you define your own draw_item "
                                              "function, you may want to check given 'item' is of the right type...)");
-       RNA_def_function_flag(func, FUNC_REGISTER);
+       RNA_def_function_flag(func, FUNC_REGISTER_OPTIONAL);
        parm = RNA_def_pointer(func, "context", "Context", "", "");
        RNA_def_property_flag(parm, PROP_REQUIRED);
        parm = RNA_def_pointer(func, "layout", "UILayout", "", "Layout to draw the item");