New API function to call an existing menu

Thanks Campbell Barton for the help and review.
This is for Blender 2.8, so we are not using this function yet.

2 files changed, 14 insertions, 0 deletions

diff --git a/source/blender/windowmanager/WM_api.h b/source/blender/windowmanager/WM_api.h
index e40026880c4..96ed179c8f4 100644
--- a/source/blender/windowmanager/WM_api.h
+++ b/source/blender/windowmanager/WM_api.h
@@ -230,6 +230,7 @@ void		WM_operator_view3d_unit_defaults(struct bContext *C, struct wmOperator *op
 int			WM_operator_smooth_viewtx_get(const struct wmOperator *op);
 int			WM_menu_invoke_ex(struct bContext *C, struct wmOperator *op, int opcontext);
 int			WM_menu_invoke			(struct bContext *C, struct wmOperator *op, const struct wmEvent *event);
+void		WM_menu_name_call(struct bContext *C, const char *menu_name, short context);
 int			WM_enum_search_invoke(struct bContext *C, struct wmOperator *op, const struct wmEvent *event);
 			/* invoke callback, confirm menu + exec */
 int			WM_operator_confirm		(struct bContext *C, struct wmOperator *op, const struct wmEvent *event);
diff --git a/source/blender/windowmanager/intern/wm_event_system.c b/source/blender/windowmanager/intern/wm_event_system.c
index a71202bfa71..8f0b5de0cde 100644
--- a/source/blender/windowmanager/intern/wm_event_system.c
+++ b/source/blender/windowmanager/intern/wm_event_system.c
@@ -1394,6 +1394,19 @@ int WM_operator_name_call(bContext *C, const char *opstring, short context, Poin
 }
 
 /**
+ * Call an existent menu. The menu can be created in C or Python.
+ */
+void WM_menu_name_call(bContext *C, const char *menu_name, short context)
+{
+	wmOperatorType *ot = WM_operatortype_find("WM_OT_call_menu", false);
+	PointerRNA ptr;
+	WM_operator_properties_create_ptr(&ptr, ot);
+	RNA_string_set(&ptr, "name", menu_name);
+	WM_operator_name_call_ptr(C, ot, context, &ptr);
+	WM_operator_properties_free(&ptr);
+}
+
+/**
  * Similar to #WM_operator_name_call called with #WM_OP_EXEC_DEFAULT context.
  *
  * - #wmOperatorType is used instead of operator name since python already has the operator type.