ui->graphicsView->setScene(main);
ui->graphicsView->setSceneRect(0,0,screenGeometry.width(),15);
ui->graphicsView->setTransformationAnchor(QGraphicsView::NoAnchor);
main->setBackgroundBrush(this->palette().window());
main->setSceneRect(0,0,screenGeometry.width(),15);
ui->graphicsView->setScene(main);
ui->graphicsView->setSceneRect(0,0,screenGeometry.width(),15);
ui->graphicsView->setTransformationAnchor(QGraphicsView::NoAnchor);
main->setBackgroundBrush(this->palette().window());
main->setSceneRect(0,0,screenGeometry.width(),15);