Solved How to access a QGraphicsItem's state in paint event via the option parameter?

[Niagarer]

Hi!
I have a working C++ code snippet where I check for a QGraphicsItem placed in a QGraphicsScene whether the mouse is hovering over it:

void ParameterPin::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
    Q_UNUSED(widget);

    QPen pen = QPen(QBrush(QColor(150, 150, 150)), 2);
    QBrush brush = QBrush(_color);

    if(option->state & QStyle::State_MouseOver) {
        brush.setColor(_color.lighter());
    }

    // Point
    painter->setPen(pen);
    painter->setBrush(brush);

    painter->drawEllipse(0, 0, 15, 15);
}

The option parameter is of QStyleOptionGraphicsItem class which according to the docs inherits from QStyleOption. QStyleOption has a state variable which is a state enum representing different states including the MouseOver state.

For some reason, the same code shown above doesn't work with PySide2. The PySide2 documentation is uncomplete there and I can't find a way to accomplish the same. Any suggestions?

An approach like this:

            if option.state and QStyle.State_MouseOver:
                color = color.lighter()

always returns true.
Thanks for answers!

[SGaist]

Hi,

& and "and" are not the same operation. You need the former which is a "bitwise and".

[SGaist]

Hi,

& and "and" are not the same operation. You need the former which is a "bitwise and".

[JonB]

@Niagarer
As @SGaist has said. Just so you know when reading C++ code, it is && in C++ which equates to Python and. Single & C++ operator is same as Python's &.

[Niagarer]

@SGaist oh my goodness, totally, thank you so much!