@mrjj Hey I implemanted the project the QGraphicsView way. But even though I can draw now. When I open a video I can only hear the audio but can't see the video. Can you help me with this now ?

mygraphicsview.h

#ifndef MYGRAPHICSVIEW_H #define MYGRAPHICSVIEW_H #include <QObject> #include <QWidget> #include <QGraphicsView> #include <QMouseEvent> #include <QPainter> #include <QRubberBand> #include <QLabel> class MyGraphicsView : public QGraphicsView { Q_OBJECT public: MyGraphicsView(QWidget *parent = nullptr); protected: void mouseMoveEvent(QMouseEvent *ev); void mousePressEvent(QMouseEvent *ev); void mouseReleaseEvent(QMouseEvent *ev); void paintEvent(QPaintEvent *ev); private: QRubberBand *rubberBand; QPoint origin; QRect rect; }; #endif // MYGRAPHICSVIEW_H

mygraphicsview.cpp

#include "mygraphicsview.h" MyGraphicsView::MyGraphicsView(QWidget *parent): QGraphicsView (parent), rubberBand(nullptr){} void MyGraphicsView::mousePressEvent(QMouseEvent *ev) { origin = ev->pos(); if(!rubberBand) rubberBand = new QRubberBand(QRubberBand::Rectangle, this); rubberBand->setGeometry(QRect(origin,QSize())); rubberBand->show(); QGraphicsView::mousePressEvent(ev); } void MyGraphicsView::mouseMoveEvent(QMouseEvent *ev) { rubberBand->setGeometry(QRect(origin,ev->pos()).normalized()); QGraphicsView::mouseMoveEvent(ev); } void MyGraphicsView::mouseReleaseEvent(QMouseEvent *ev) { rect = rubberBand->geometry(); update(); QGraphicsView::mouseReleaseEvent(ev); } void MyGraphicsView::paintEvent(QPaintEvent *ev) { QGraphicsView::paintEvent(ev); QPainter painter(this->viewport()); painter.setBrush(Qt::red); if(!rect.isNull()) painter.drawRect(rect); }

That's exactly what I have been looking for! I definitely searched for the wrong terms.
Thank you for your help. Very appreciated.

@p3c0 You can upvote answer if you find it useful ;)