void click_cb(GtkMathView*, GdomeElement*, gint, GtkMathViewControlData*);
void select_begin_cb(GtkMathView*,GdomeElement*, gint, GtkMathViewControlData*);
void select_over_cb(GtkMathView*,GdomeElement*,gint, GtkMathViewControlData*);
void click_cb(GtkMathView*, GdomeElement*, gint, GtkMathViewControlData*);
void select_begin_cb(GtkMathView*,GdomeElement*, gint, GtkMathViewControlData*);
void select_over_cb(GtkMathView*,GdomeElement*,gint, GtkMathViewControlData*);