Assigns a delegate to the headerClick event.
public void addOnHeaderClick( ColumnEventHandler handler )
handler
The ColumnEventHandler delegate to be notified when the event occurs.
The headerClick event occurs when the user clicks a column header. Column headers are displayed if the columnHeaders property is set to true.
Clicking a column header also selects the column. After the headerClick event occurs, the selChange event is triggered.
See Also removeOnHeaderClick