QGraphicsView widget, QGraphicsScene. Default 0.0.

[prasad_N]

You can use QGraphicsScene::setSceneRect(QRectF),. It will set logical coordinates you want.

Ex : if your scene geomerty is 0,0, width , height
I think what you can do is :

scene->setSceneRect(0, heigh, width, -height);

scene->setSceneRect(0, heigh, width, -height);

To copy to clipboard, switch view to plain text mode 

[kloopa]

Thank you for reply.
I tried, not working.

self.ui.graphicsView.scene = QtWidgets.QGraphicsScene()
self.ui.graphicsView.setScene(self.ui.graphicsView .scene)
self.ui.graphicsView.scene.setSceneRect(0, 650, 500, -650)
self.ui.graphicsView.setRenderHints(QPainter.Antia liasing)
path = QPainterPath()
path.moveTo(20.0, 20.0)
path.lineTo(50, 20)
path.moveTo(20.0, 20.0)
path.lineTo(20, 50)
self.ui.graphicsView.scene.addPath(path)

5.png

[kloopa]

No more ways to do this?

[anda_skoa]

You could try a transformation.

Translate to the bottom left point and scale with 1/-1

Cheers,
_

[kloopa]

Do you have example how to do this?