How to rotate a Qt5 application using the linux framebuffer?
You could handle it on application level. With QML thats easy, but with QWidgets the best I could come up with is to render the Widget on a QGraphicsScene and rotate it like this:
#include "mainwindow.h"#include <QApplication>#include <QGraphicsScene>#include <QGraphicsView>int main(int argc, char *argv[]){ QApplication a(argc, argv); MainWindow w; QGraphicsScene *scene = new QGraphicsScene(); QGraphicsView *view = new QGraphicsView(); view->setGeometry(w.geometry()); view->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff); scene->addWidget(&w); view->setScene(scene); view->show(); view->rotate(180); //w.show(); return a.exec();}It seems a bit glitchy, but you could give it a try.
Also I think the correct syntax is -platform linuxfb:fb=/dev/fb0:rotation=180 note the = instead of :Edit: but that did not make a difference for me either.