void zoomMouseDown(Widget w, int button, int x, int y, void *data);
void zoomMouseUp(Widget w, int button, int x, int y, void *data);
void zoomMouseMotion(Widget w, int x, int y, void *data);
void prefs(Widget w, void *data);
void mesh(Widget w, void *data);
void zoom(Widget w, void *data);
void unzoom(Widget w, void *data);
void inforedisplay(Widget w, int new_width, int new_height, void *data);
void draw(Widget w, void *data);
void inputBoundary(Widget w, void *data);
void moveBoundary(Widget w, void *data);
void plotprefs(Widget w, void *data);
void redisplay(Widget w, int new_width, int new_height, void *data);
void infoHandler(char *info);
void errorHandler(char *msg);
void set_menu_state();
void init_flags();
void print(Widget w, void *data);
void print2file(Widget w, void *data);
void doPlotting();
void pleaseWait();
void setAction(int thisAction);