更改QPrintDialog样式

QPrintDialog printDialog;
printDialog.setStyleSheet("background-color: red;");

class CustomPrintDialog : public QPrintDialog
{
protected:
    void paintEvent(QPaintEvent* event) override
    {
        QPainter painter(this);
        painter.fillRect(rect(), Qt::red);
    }
};

CustomPrintDialog printDialog;

class CustomPrintDialog : public QPrintDialog
{
protected:
    void paintEvent(QPaintEvent* event) override
    {
        QPainter painter(this);
        painter.fillRect(rect(), Qt::red);
    }
};

CustomPrintDialog printDialog;
printDialog.setStyleSheet("QPushButton { background-color: blue; }");