How to exclude a specific widget from the global stylesheet?

Qt123

Hi,

In my application I set a global stylesheet, for example:

qApp->setStyleSheet("QPushButton { background-color: red; }");

This works fine, but now I want one specific QPushButton not to use the global style and instead use the default system look.

I tried setting a different stylesheet on that button, but it still inherits the global rules.

Question:
How can I clear or override the global stylesheet for a single widget, so that it is rendered with the default system style instead of the global QSS?

Thanks!

jsulm

@Qt123 said in How to exclude a specific widget from the global stylesheet?:

I tried setting a different stylesheet on that button, but it still inherits the global rules.

That should work. How do you do it?

ChrisW67

TEMPLATE = app
TARGET = test
INCLUDEPATH += .
QT+= widgets
SOURCES += main.cpp

#include <QApplication>
#include <QWidget>
#include <QPushButton>
#include <QVBoxLayout>

class BoringButton: public QPushButton {
        Q_OBJECT
public:
        explicit BoringButton(const QString &text, QWidget *parent = nullptr): QPushButton(text, parent) { }
};

int main(int argc, char **argv) {
        QApplication app(argc, argv);

        QWidget widget;
        QString originalStyleSheet = widget.styleSheet();
        widget.setStyleSheet( ".QPushButton { background-color: cyan; } ");
        
        QVBoxLayout *layout = new QVBoxLayout(&widget);
        QPushButton *button1 = new QPushButton("Styled");
        layout->addWidget(button1);

        QPushButton *button2 = new BoringButton("Default");
        layout->addWidget(button2);

        widget.show();
        return app.exec();
}

#include "main.moc"

Bonnie

You can't "un-inherit" stylesheet. You can only overrride it with other value of the same property.

SimonSchroeder

You can see if any of the selectors (https://doc.qt.io/qt-6/stylesheet-syntax.html) work for you. You could create your own subclass of QPushButton. As long as all the other buttons are actual QPushButtons the class selector .QPushButton would only style these, but not your subclass. Or you could try to use a Property Selector with your own property. But I'm not sure if that works for buttons that don't have that property. (You see, it is a lot easier to just specify something for a specific button, but a lot harder to specify something for all other buttons.)