[Help] : How to style sub-control for inherited classes?

Broot7

Hey there, hope all's well - I couldn't find any obvious online so I'm seeking help here.

I implemented a subclass for QTabBar because I needed to override the tabSizeHint function.

Unfortunately after implementing the new class the style sheet, my style sheet no longer works for sub-controls, the style for custom-class works however. I'd like to mention I also have both Q_OBJECT macro and have overridden the QWidget::PaintEvent in my class.

Appreciate any help - thanks in advance :].

// This works!
NodeViewTab { // My custom class inheriting QTabBar
    background-color: #353535;
    border: 0;
    padding: 0;
    margin: 0;
    outline: 0;
    border-bottom: 2 solid #505050;

}

// This does NOT!
NodeViewTab::tab, QTabBar::tab {
    background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1,
                                stop: 0 #454545, stop: 1.0 #353535);
    color: #c0c0c0;
    min-width: 8ex;
    padding: 2px;
    max-width: 80ex;
}

Christian Ehrlicher

When you paint yourself the stylesheet can not be in effect. What do you do in the paint event?

Broot7

hey Christian - I've looked at other topics and they said it's required to override the paintEvent in order for QWidget sub-classes to use style sheets. And in my experience this has proven true - as without it the stylesheet wouldn't work to begin with.

void MyQWidget::paintEvent(QPaintEvent* e){
    QStyleOption opt;
    opt.initFrom(this);
    QPainter p(this);
    style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);
}

HOWEVER, I realized I didn't actually need a subclass for QTabBar since there was a func called setExpanding that I needed to set to false. I just deleted my subclass and I'm using the QTabBar style sheets and.. I guess things just work as I want it to for now.

Having said that, do you know what would be the proper method to set the style of subcontrols for custom classes?

Christian Ehrlicher

So you call the painting stuff and the style sheet can apply. But you don't style MyWidget but NodeViewTab.

Broot7

That was just an example of the paintEvent override, I have the exact same thing in NodeViewTab.