ECE497 Notes on Qt

Here are some notes on using Qt on the Beagle.

Useful Links

• The Qt site
• It looks like the best way to get going is use bitbake. I'm trying

$ source ~/.oe/environment-2008
$ bitbake qt4-x11-free-gles

• This looks like a nice reference.
• Building Qt to make use of the Beagle board’s SGX GPU
• Building Qt from TI's site
• Embedded Linux Qt
• If you want recompile everything: Setting Up Qt Development Environment for BeagleBoard-xM has some nice instructions on getting QT going on the Beagle. It's set up for using Qt embedded. This writes directly to the framebuffer and doesn't need (and interferes with) X windows.

./configure -opensource -confirm-license -prefix /opt/qt-arm -no-qt3support -x11 -little-endian -xplatform qws/linux-DM3730-g++ -qtlibinfix E

I'm working through this example. I can't change mousearea1 to MouseArea to match the figure. I think something is missing in the instructions.

The Transitions section has some details missing:

   transitions: [
        Transition {
            from: "*"; to: "State1"
            NumberAnimation {
                properties: "x,y";
                duration: 1000
            }
        }
    ]

QWT

QWT is short for Qt Widgets for Technical Applications. It is a collection of widgets and support classes for creating technical applications such as those created using, for example, LabView or Test Point.

Here is some info on QWT. I think it might be able to plot data as it comes in.

I'm trying to fix the include path with:

export CPLUS_INCLUDE_PATH=/usr/include/qt4/Qt

Installs

Here's what I've installed on the Beagle

opkg install qt4-demos
opkg install linuxtag-ics
opkg install qt4-examples
opkg install qt4-x11-free qt4-x11-free-doc qt4-x11-free-dev
opkg install qmake2

I think you need to do this before running qmake.

$ cd /usr/bin
$ ln -s moc moc-qt4
$ ln -s uic uic-qt4
$ ln -s qmake-qt4 qmake

$ source /usr/share/qt4/environment-setup