+
+ /**
+ * Called by the system when the close button is pressed
+ * @param sender the sender object
+ * @param selector message type and id
+ * @param data event related data
+ * @return
+ */
+ long onQuit(FXObject *sender, FXSelector selector, void *data);
+
+
+ /**
+ * Set current L-system generator
+ * @param lsystem the L-system generator
+ */
+ void setLSystem(LindenmayerSystem *lsystem);