diff -r 1524b5dc4d4d -r 0accf125a65f ui/gtk/toolkit.h
--- a/ui/gtk/toolkit.h	Thu Apr 16 17:41:35 2026 +0200
+++ b/ui/gtk/toolkit.h	Fri Apr 17 13:21:11 2026 +0200
@@ -149,6 +149,7 @@
     int         value;
     int         customint;
     void        *customdata;
+    char        *action;
 } UiEventData;
 
 typedef struct UiEventDataExt {
@@ -200,6 +201,7 @@
 void ui_set_widget_nvisibility_states(UiContext *ctx, GtkWidget *widget, const int *states, size_t ngroups);
 
 void ui_destroy_userdata(GtkWidget *object, void *userdata);
+void ui_destroy_eventdata(GtkWidget *object, UiEventData *data);
 void ui_destroy_vardata(GtkWidget *unused, UiVarEventData *data);
 void ui_destroy_widget_var(GtkWidget *object, UiVar *var);
 void ui_destroy_boundvar(UiContext *ctx, UiVar *var);