Problem about porting Q3Table to QTableWidget

[batileon]

If I want to switch the QT3 Q3Table code to QT4 QTableWidget, what changes should I make to the following methods?

setResizePolicy( Q3Table::Default );
    setReadOnly( TRUE );
    setTopMargin(31);
    setLeftMargin(-1);
    setFocusStyle( Q3Table::FollowStyle );
    updateCell( 1, 0 );

setResizePolicy( Q3Table::Default );
    setReadOnly( TRUE );
    setTopMargin(31);
    setLeftMargin(-1);
    setFocusStyle( Q3Table::FollowStyle );
    updateCell( 1, 0 );

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And in the past, I can override the virtual paint method:

void QTableItem::paint ( QPainter * p, const QColorGroup & cg, const QRect & cr, bool selected ) [virtual]

void QTableItem::paint ( QPainter * p, const QColorGroup & cg, const QRect & cr, bool selected ) [virtual]

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What should I do in order to change that to QTableWidgetItem?

Thanks a lot!!!