4.8 Embedded (BeagleBone) Screen Rotate [Solved]

[ElliotF2594]

I am attempting to develop an app to run on a BeagleBone black

My next challenge is to get the display rotated through 180
So far I have had no success
The app runs fine on the BeagleBoard before any rotation
I have tried several different things so far based on lots of searches but to no avail :(

I have tried adding
@
QWSDisplay::setTransformation(QTransformedScreen:: Rot180);
@

but that had no affect

I then tried reconfiguring and recompiling qt from source on my host (ubuntu 14.04 in vm) adding the '-qt-gfx-transformed' option to configure program
Qt seemed to configure and compile correctly
I then added
@
#include <QtPlugin>
Q_IMPORT_PLUGIN(qgfxtransformed)
@

to my main.cpp (above main(...))
and also

@
QTPLUGIN += qgfxtransformed
@

to my .pro file

Then when I attempt to build the project I get a linker problem ":-1: error: cannot find -lqgfxtransformed"

I am using qtcreator g++ to build the application

Please help! I have been stuck on this for hours!
Elliot

EDIT:

Shortly after posting this I realised that I had actually solved this about an hour before without realising it! DOH!

Reconfiguring and recompiling the qt source actually did fix my problem, I needed no code changes and I just simply did not add the "-display "transformed:rot180" to the running arguments of qt

I discovered my error when I tried to run the program file explicitly using that extra argument and it worked!

[ronaldsamuelpasaribu]

This post is deleted!

[ronaldsamuelpasaribu]

can you explain for detail about "Reconfiguring and recompiling the qt source actually did fix my problem"
i can't solve the problem
thanks

[jjan]

@ronaldsamuelpasaribu He simply recompiled Qt from source and configured it to include qgfxtransformed (whatever this is). I don't know if the thread creator will ever answer because also this post is 9 months old.

[ronaldsamuelpasaribu]

@jjan thanks for respon my post
i succeed reconfigure qt
but if i build aplication with qt creator (reconfigured)
i have error
cannot find -lqgfxtransformed
can you help?
and one more question
error in my friendlyarm is
./test -qws
transformed: driver not found
Aborted

this problem from my compiler or my device friendlyarm??
thanks

[jjan]

@ronaldsamuelpasaribu https://forum.qt.io/topic/47319/solved-statically-linked-qt-and-gfx-transformed-driver