paintEvent removes QFrame border

[user4592357]

the title says it all. when i remove the paint event override, the frame box is displayed. please help understand

here's the code:

class Frame : public QFrame
{
	Q_OBJECT
public:
	Frame(QWidget *parent = nullptr);
protected:
	void paintEvent(QPaintEvent *event) override;
	void mousePressEvent(QMouseEvent *event) override;
};

Frame::Frame(QWidget *parent /* = nullptr */)
	: QFrame(parent)
{
	auto pTitleLabel = new QLabel("Frame", this);

        setFrameStyle(QFrame::StyledPanel);
	setFixedSize(400, 600);
}

void Frame::paintEvent(QPaintEvent *event)
{
	QWidget::paintEvent(event);
}

void Frame::mousePressEvent(QMouseEvent *event)
{
	QWidget::mousePressEvent(event);
}

[SGaist]

Hi,

Because you are calling QWidget's paint function rather than QFrame's paint function which is the base class of your widget.