void gtk_widget_set_support_multidevice ( GtkWidget* widget, gboolean support_multidevice )
Enables or disables multiple pointer awareness. If this setting is
widget will start receiving multiple, per device enter/leave events. Note
that if custom
GdkWindows are created in
gdk_window_set_support_multidevice() will have to be called manually on them.
Available since: 3.0