Setup a QGraphicsView with Bottom Left Coordinate origin ?

xteo

Hi ,

I am writing an application that display a series of layered tracks when the first track is at the bottom of the Scene .
I currently adjust all the y position of my widget based on the height of the scene for my tracks are base on a bottom left origin but it is not very clean .

is there a good way to setup a scene so new item coordinate are in a bottom Left origin coordinate system ?

Thanks

Damien

rcari

You could apply a transformation matrix that basically does this coordinates change for you and apply at the root element of your QGraphicsScene.

xteo

Cool but wouldn't all my Item inside the View been flipped as well ?
as if I apply a scale(1,-1) to flip the y direction axis and then the transform to reset the origin .
the "space" woulld be upside down ? would I have then to also scale(-1,1) all my childs item so they are the right way around ?

I will do some test, I want to try to do it the correct way rather than "a way" that kinda works :)

Thanks for your reply

Damien