private void calculateSizes(final Graphics g){
  m_rowHeight=getRowHeight(g);
  m_charHeight=getCharHeight(g);
  m_charWidth=getCharacterWidth(g);
}

private void calculateSizes ( final Graphics g ) { m_rowHeight = getRowHeight ( g ) ; m_charHeight = getCharHeight ( g ) ; m_charWidth = getCharacterWidth ( g ) ; }
calculates current character and row sizes .
