This is based on Daniel Stonier's excellent qt_ros package (http://wiki.ros.org/qt_ros) with some small modifications to support Qt5. Any bugs are probably due to my quick hack!

To clone and build,

cd ~
git clone git://github.com/richards-tech/rosqt45
cd ~/rosqt45
catkin_make

This will generate a Qt4 build. To use Qt5, set the QT5 parameter to 1:

catkin_make -DQT5=1

Note that if switching between Qt versions, it is necessary to delete the build and devel directories - a catkin_make clean does not do everything required to change versions.

Use a terminal window to start up roscore (if not already running):

roscore

In another terminal window enter:

cd ~/rosqt45
source devel/setup.sh
rosrun qt_tutorials qlistener

In another terminal window enter:

cd ~/rosqt45
source devel/setup.sh
rosrun qt_tutorials qtalker

In both GUI windows, select to use environment variables and connect to the master.

Use a terminal window to start up roscore (if not already running):

roscore

In another terminal window enter:

cd ~/rosqt45
source devel/setup.sh
rosrun qt_tutorials qadd_server

In another terminal window enter:

cd ~/rosqt45
source devel/setup.sh
rosrun qt_tutorials qadd_client

In both GUI windows, select to use environment variables and connect to the master.