Removing dotted border without setting NoFocus in Windows PyQt

Question

There are a few questions on SO about this, all of which seem to say that the only way to remove the dotted border is to set the focusPolicy on widget/item in question to NoFocu

Answer 1

Most styles delegate the drawing of the focus indicator to the QStyle::drawPrimitive function with PE_FrameFocusRect as the element to be drawn.

So you should be able to disable that globally with the following style class installed on the application instance:

class NoFocusProxyStyle : public QProxyStyle {
public:

    NoFocusProxyStyle(QStyle *baseStyle = 0) : QProxyStyle(baseStyle) {}

    void drawPrimitive(PrimitiveElement element, const QStyleOption *option, QPainter *painter, const QWidget *widget) const {
        if(element == QStyle::PE_FrameFocusRect) {
            return;
        }
        QProxyStyle::drawPrimitive(element, option, painter, widget);
    }

};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);    
    a.setStyle(new NoFocusProxyStyle);
    ...

PS: It doesn't work with QGtkStyle for some widgets (buttons, combobox), so it might not work for Windows or Mac either.