if ( alpha != null ) {
sbc.setAlpha( alpha );
}
}
StackKey key = new StackKey();
String text = getColumnHeader( col );
key.setText( text );
key.setColour( getColor( col ) );
sbc.addKeys( key );
for ( int row = 0; row < getRowCount(); row++ ) {
Stack stack = null;
if ( sbc.getStackCount() > row ) {