QGraphicsPixmapItem catch mouse over Corner

[SeppyQT]

Dear Community,

I accomplished to catch a OnMouseOver event for my QGraphicsPixmapItem via inheritance of QGraphicsView

class CGraphicsView : public QGraphicsView
{
	Q_OBJECT
private:
	std::atomic<bool> stop_move = false;
public:
	CGraphicsView(QGraphicsScene* scene, QWidget* parent = nullptr) : QGraphicsView(scene, parent) {}
	CGraphicsView(QWidget* parent = nullptr) : QGraphicsView(parent){}

	virtual void mouseMoveEvent(QMouseEvent* event) override;

	void startStopMove(bool stop = false);
signals:
	Q_SIGNAL void GraphicsViewMouseMove(void* sender, QMouseEvent* args);
};

///
#include "CGraphicsView.hpp"

void CGraphicsView::mouseMoveEvent(QMouseEvent* event)
{
	emit this->GraphicsViewMouseMove(reinterpret_cast<void*>(this), event);
	if(!this->stop_move)
		QGraphicsView::mouseMoveEvent(event);
}

void CGraphicsView::startStopMove(bool stop)
{
	this->stop_move = stop;
}

Now I can put a OpenHandCursor to symbolize that you can grab and move the picture.

But now I want to make another Cursor if the user is around the corners of the item

uint64_t counter = 0;
void mouseOver(void* sender, QMouseEvent* event)
	{
		
		auto rect = this->boundingRect();
		auto cursor = this->cursor();
		if (rect.contains(event->pos())) {
			auto pos = this->getPosition();
			qDebug((std::to_string(counter)+ " -> " + std::to_string(pos.first)).c_str());
			if (rogue::approximate(pos.first,10.0,10.0) && rogue::approximate(pos.second, 10.0,10.0)) {
				cursor.setShape(Qt::CursorShape::CrossCursor);
			}
			else
				cursor.setShape(Qt::CursorShape::OpenHandCursor);
		}
		this->setCursor(cursor);
		++counter;
	}

ignore counter variable it is just a global debug Variable which will be removed
rogue::approximate is just a template function which actually returns a bool if x > firstlimit and if x < secondlimit
so it emulates if( llimit < val < rlimit)

template<class TYPE>
	bool approximate(TYPE val, TYPE llimit, TYPE rlimit) {
		if (val > llimit) {
			if (val < rlimit)
				return true;
		}
		return false;
	}

I am used to use template<class X> and I continued it even typename X is legal too.

How do I catch MouseOverCorners?

Thanks for replies.