The QOpenGLWidget and QLabel updates frequently, resulting in memory leaks

[MissingDream]

The code is as follows:

class PlayerLabelSubtitle2 : public QLabel
{
public:
       PlayerLabelSubtitle2(QWidget* pareat, int x, int y, int w, int h) : QLabel(pareat)
	{
		x_ = x;
		y_ = y;
		width_ = w;
		height_ = h;
		move(x, y);
		resize(w, h);
	}
protected:
	void paintEvent(QPaintEvent *event)
	{
		return;
	}
private:
private:
	int x_;
	int y_;
	int width_;
	int height_;
};

class XVideoWidget : public QOpenGLWidget, protected QOpenGLFunctions
{
	Q_OBJECT

public:
	XVideoWidget(QWidget* parent = NULL):QOpenGLWidget(parent){}
	~XVideoWidget()
	{
		for (auto label : label_)
                {
                      delete label;
                }
                label_.clear();
	}
protected:
	void initializeGL(){}
	void paintGL(){}
	void resizeGL(int width, int height){}
public:
	int handle()
	{
		update();
		for (auto& label : label_)
			label->update();
		return 0;
	}
	
	void this_run()
	{

		play_timer_ = new QTimer;
		play_timer_->setInterval(5);
		connect(play_timer_, &QTimer::timeout, this, &XVideoWidget::handle);
		resize(1920, 1079);

		int y = 0;
		for (int i = 0; i < 3; i++)
		{
			PlayerLabelSubtitle2* temp = new PlayerLabelSubtitle2(this, 0, y, 300, 100);
			temp->show();
			label_.push_back(temp);
			y += 200;
		}
		play_timer_->start();
	}
};


int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
        XVideoWidget w;
	w.show();
	w.this_run();
        return a.exec();
}

In the code above, memory is always growing, and increasing the timer interval will slow it down . Does anyone know a solution? thanks very much!

[Christian Ehrlicher]

@MissingDream Please properly format your code with the code tags ('</>' button) so we can read it.