Invert Y axis in standalone Qt5 application

[Dominik2000]

How can I invert the y axis in a standalone Qt5 application with standard eglfs framebuffer?
I have a eGalax touchscreen. Compiled the kernel and set the evdev InputClass to InvertY 1. With this setting lxde works correct, but in the Qt application not. It's inverted on the y axis. Don't know exactly what to do?

[Alex293]

hi i have the same kind of issue. My touch screen work well with startx but i need to invert y axis for qt on eglfs and i can't how did you do this ? How can i modify evdev properties ?

[Dominik2000]

I didn't solved it either, I compiled the qt application not as standalone and started it in the X context.

[Alex293]

ha

[Alex293]

take a look to this, it worked to me http://qt-project.org/forums/viewthread/42365/

Now i can use qtquick 2 to develop eglfs app and use my touch screen via tslib