public void removeAll(){
  checkWidget();
  deselectAll();
  vScroll.setSelection(0);
  hScroll.setSelection(0);
  focusItem=-1;
  focusColumn=null;
  topIndex=-1;
  bottomIndex=-1;
  shiftSelectionAnchorColumn=null;
  topColumns.clear();
  columns.clear();
  columnElements=new Object[0];
  rowElements=new Object[0];
}

public void removeAll ( ) { checkWidget ( ) ; deselectAll ( ) ; vScroll . setSelection ( 0 ) ; hScroll . setSelection ( 0 ) ; focusItem = - 1 ; focusColumn = null ; topIndex = - 1 ; bottomIndex = - 1 ; shiftSelectionAnchorColumn = null ; topColumns . clear ( ) ; columns . clear ( ) ; columnElements = new Object [ 0 ] ; rowElements = new Object [ 0 ] ; }
removes all of the items from the receiver .
