Change how selected a QGraphicsItem object is displayed

[Michael Lehn]

Hi,

I have a class JoinItem derived from QGraphicsRectItem. When selected such an item should be painted blue and otherwise black. Instead of the default where it gets surrounded by a dashed rectangle. So I just want to change how a selected QGraphicsRectItem is displayed (everything else should be as before).

My implementation works but I wonder whether it is the "right thing" ...

In JoinItem the paint method is implemented as follows:

void
JoinItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                QWidget *widget)
{
    QStyleOptionGraphicsItem opt = *option;
    if (isSelected()) {
        setPen(QPen(Qt::blue, 2));
        opt.state = QStyle::State_None;
    } else {
        setPen(QPen(Qt::black, 2));
    }
    QGraphicsRectItem::paint(painter, &opt, widget);
}

So my hack is that QGraphicsRectItem::paint simply never gets the state QStyle::State_Selected. Making a copy of option in ant case seems to be a crude hack.

[Pl45m4]

@Michael-Lehn said in Change how selected a QGraphicsItem object is displayed:

My implementation works but I wonder whether it is the "right thing" ...

Should be fine since you only change the style. The selection behavior should not be affected