Sets the GtkWidgetClass.activate_signal field with the given @signal_id.
The signal will be emitted when calling [method@Gtk.Widget.activate].
The @signal_id must have been registered with g_signal_new() or g_signal_newv() before calling this function.
the id for the activate signal
See Implementation
Sets the GtkWidgetClass.activate_signal field with the given @signal_id.
The signal will be emitted when calling [method@Gtk.Widget.activate].
The @signal_id must have been registered with g_signal_new() or g_signal_newv() before calling this function.