#include <QtWidgets>

int main(int argc, char** argv)
{
	QApplication app(argc, argv);

	QGraphicsScene scene;
	scene.setSceneRect(0, 0, 400, 280);
	QGraphicsView view(&scene);

	view.setTransform(QTransform::fromScale(2, 2));
	view.verticalScrollBar()->setValue(0);
	view.horizontalScrollBar()->setValue(0);
	view.show();

	QAction* pasteAction = new QAction(&view);
	pasteAction->setShortcuts(QKeySequence::Paste);
	pasteAction->setShortcutContext(Qt::ApplicationShortcut);
	view.addAction(pasteAction);
	QObject::connect(pasteAction, &QAction::triggered, &view, [&scene] {
		const QMimeData* pastedData = QApplication::clipboard()->mimeData();
		if (pastedData->hasImage())
		{
			QGraphicsPixmapItem* image = new QGraphicsPixmapItem();
			image->setPixmap(QPixmap::fromImage(pastedData->imageData().value<QImage>()));
			image->setFlag(QGraphicsItem::ItemIsMovable);
			scene.addItem(image);
		}
	});

	return app.exec();
}