qttransparentqwidgetqtstylesheetsqframe

QFrame round border transparent background

I'm creating a round context menu using QFrame.

To make round corner, I used Qt style sheet :

this->setStyleSheet("QFrame#ShareContextMenu{
    background-color:rgb(255,255,255);
    border-width:1px;
    border-color :rgb(0,0,0);
    border-radius:10px;
    border-style:solid;}

QPushButton{background-color:rgba(255,255,255,0);}
QPushButton::hover{background-color:rgba(125,125,125,50); border-radius:5px;}");

How can I remove the white background marked with red circles in this picture?

enter image description here

Solution

  • I think you cannot resolve the problem using style sheets. QMenu is a rectangular top-level widget.

    Is this your QMenu? If so, try this:

    this->setWindowFlags(this->windowFlags() | Qt::FramelessWindowHint);
this->setAttribute(Qt::WA_TranslucentBackground);

    Replace this by your instantiated QMenu object.

    Of course, you could also use setMask to hide the required region. For example:

    QRegion region (menu->x(),
                menu->y(),
                menu->sizeHint().width(),
                menu->sizeHint().height(),
                QRegion::Ellipse);
menu->setMask(region);