+ QRect screenGeometry = QApplication::desktop()->screenGeometry();
+ QGraphicsScene *main = new QGraphicsScene(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);
+ main->addRect(0,0,screenGeometry.width()/2,15,QPen(Qt::white),QBrush(Qt::white));