How to remove border around QGraphicsItem when selected?

Question

Pretty basic question but I couldn't find a solution through google. In QT when a graphics item is selected, there's a border around it. I was wondering how I can set this border to be invisible. Thanks.

Answer 1

There's no interface to disable the drawing of the selection border for the build-in QGraphicsItems. The only way I can think of is derive your own items from the build-in ones and override the paint() function:

void MyRectItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
    QStyleOptionGraphicsItem myOption(*option);
    myOption.state &= ~QStyle::State_Selected;
    QGraphicsRectItem::paint(painter, &myOption, widget);
}

It's not tested but basically you make a copy of option passed and clear the selection state flag before passing it to the actual paint() .

Answer 2

如果您的 QGraphicsItem 是从 QAbstractGraphicsShapeItem 派生的，那么您可以简单地禁用它的笔，例如：

myShape->setPen(Qt::NoPen);

Answer 3

for those trying to figure it out using python:

def paint(self, painter, option, a):
    option.state = QStyle.State_None
    return super(MyClassName, self).paint(painter,option)