Qwt, Creator, RapberryPi Jessie

[hgstoehr]

Hi,
I had no troubles installing Qt, Creator and Qwt on Rasbian Wheezy. The installed version was
Qt Creator 2.5.0
Based on Qt 4.8.1

Installation was done using:
sudo apt-get install qt4-dev-tools libqt4-dev qt4-qmake g++ make qtcreator
sudo apt-get install libqwt-dev libqwt-doc libqwt6
Uncheck "remote linux" and "Welcome" in QtCreator -> "Help" -> "About Plugins" ,
Adaption of toolchain in QtCreator

Everything works fine: compiling of Qt & Qwt programs without problems, Qwt Widgets in QtCreator are OK

BUT:
Using Jessie and installing Qt and QtCreator version is changed to:
Qt Creator 3.2.1
Based on Qt 5.3.2 (GCC 4.9.1)
I did not find a way to keep QtCreator 2.5 and Qt 4.8
This seems to be incompatible with Qwt when installing as above: there are no widgets of Qwt in QtCreator any longer!
Existing Qwt-programs can be compiled but working without widgets in QtCreator is annoying.
I also tried to compile Qwt manually and copying *.so-files to the plugin directory, but I was not sucessful.

So my question:
Does anybody know how to keep QtCreator 2.5 and Qt 4.8 in Jessie,
or how is Qwt installed correctly in Qt 5.3 and QtCreator 3.2

Thank you
Hans
PS: I also put this problem into the forum of raspberrypi.org, but I did not get any answer.

[anda_skoa]

I am pretty sure that Jessie still comes with Qt4, so that could be used with the newer QtCreator.

You will also need qt4-designer to have a Qt Designer based on Qt4 to load the Qt4 QWT widget plugins.

Cheers,
_

[hgstoehr]

Thank you for the quick reply.

I used
sudo apt-get install qt4-dev-tools
sudo apt-get install qtcreator
sudo apt-get install libqwt-dev libqwt-doc libqwt6

There is a qt4-designer indeed and I there are QWT widgets in the designer too, but
as I wrote I got: Qt Creator 3.2.1 Based on Qt 5.3.2 (GCC 4.9.1) and NO QWT widgets!
Other widgets can be used and programs can be compiled!

Any idea?
Thanks, Hans

[anda_skoa]

There is a qt4-designer indeed and I there are QWT widgets in the designer too

Excellent, so you're good?

as I wrote I got: Qt Creator 3.2.1 Based on Qt 5.3.2 (GCC 4.9.1) and NO QWT widgets!

Right, as it is Qt5 based it can't load Qt4 based plugins.

Doesn't matter since you have a designer matching your version of Qt.

Cheers,
_

[hgstoehr]

Unfortunately there is an other issue concerning Qt Designer:
using a remote connection to my notebook (SSH X11) it is not possible to drag and drop widgets! All other things work well!
That's why I would prefer using Qt Creator: there are no drag and drop problems!

Anyway, perhaps I have to wait for a newer QWT release!
Hans

[Uwe]

You have to install qwt-qt5 ( for the creator ) and qwt-qt4 ( for your application ). The output of the qwt-qt5 plugin should be readable for a qwt-qt4 based application.
Waiting for a newer Qwt release won't help as Qwt 6.1.x supports all versions >= Qt 4.4 ( including all Qt5 versions ). What you need is a version of Qwt, hat has been built with a Qt version, that is compatible with the one your Creator has been built with

Uwe

[hgstoehr]

Finally I got things running.
I downloaded qwt-6.1.2 (sourceforge.net/projects/qwt/files/qwt/6.1.2/) --> /home/pi/qwt-6.1.2
sudo apt-get install qt5-default
sudo apt-get install libqt5svg5*
sudo apt-get install qttools5-dev
~/qwt-6.1.2 $ qmake qwt.pro
~/qwt-6.1.2 $ make
~/qwt-6.1.2 $ sudo make install
cd /usr/local/qwt-6.1.2/plugins/designer
sudo cp /usr/local/qwt-6.1.2/plugins/designer/libqwtdesignerplugin.so /usr/lib/arm-linux-gnueabihf/qt5/plugins/designer

Hans