THX nice tutorial!
Working fine.
I just created my first QT GUI in C++

when i am using “sudo apt-get install qt4-designer qt4-demos qt4-dev-tools libqt4-dev”, there is some error. it indicates that the repository don’t have qt4-demos.
And i used “apt-cache search qt4-demos” , it show nothing.
why can’t i install the qt4-demos?
thanks advance!

It’s actually not necessary to install qt4-demos. It is a demo, which just shows off different things that QT can do. But feel free to leave it out. If I use http://packages.ubuntu.com/ and search qt4-demos, It returns nothing. But if I change the distribution to hardy-backports, then it finds the package no problem ( http://packages.ubuntu.com/hardy-backports/qt4-demos ). So this makes me think that you haven’t uncommented the backports in your /etc/apt/sources.list and then performed an sudo apt-get update to update your lists. After that a sudo apt-cache search qt4-demos should turn up a positive result.

thanks for you help….
And with you help, Qt4 is running on my ubuntu now.
But there is a question, in qt assistent, there is nothing about contents , index, and I can’t use the search function.
I try to search “QString”, but It got nothing.
what’s wrong with my Qt assistent?
thanks!

Your right. I just checked mine. And Qt Assistant is the same. I don’t have time to play around with it at the moment, but by the looks of it Qt Assistant is just a front end to their API. So I suggest using this page http://doc.trolltech.com/4.4/index.html which will have all the resources you need, and specifically http://doc.trolltech.com/4.4/classes.html for searching classes. Hope that helps for now.

I solved it by install qt4-doc. but today I got a new question ,when I start eclipse, I got the error. these error display in a dialog, like below:
JVM terminated. Exit code=1
/usr/lib/jvm/java-6-sun/bin/java
-Djava.library.path=/usr/lib/jni
-Dgnu.gcj.precompiled.db.path=/var/lib/gcj-4.2/classmap.db
-Dgnu.gcj.runtime.VMClassLoader.library_control=never
-Dosgi.locking=none
-jar /usr/lib/eclipse/startup.jar
-os linux
-ws gtk
-arch x86
-launcher /usr/lib/eclipse/eclipse
-name Eclipse
-showsplash 600
-exitdata 230015
-install /usr/lib/eclipse
-vm /usr/lib/jvm/java-6-sun/bin/java
-vmargs
-Djava.library.path=/usr/lib/jni
-Dgnu.gcj.precompiled.db.path=/var/lib/gcj-4.2/classmap.db
-Dgnu.gcj.runtime.VMClassLoader.library_control=never
-Dosgi.locking=none
-jar /usr/lib/eclipse/startup.jar

And ,what is the reason? A few minites later , I change a theme, then I can run eclipse without above error now, but the theme I can’t run eclipse was download by myself from internet.
how strange things it is!

Very odd. Are you applying an Emerald theme to Gnome? Anyways thanks for letting me know it was qt4-doc, I added it to the tutorial.

I install compiz function 3D desktop on ubuntu.
do you know how to run the OpenGL/pbBuffer example of qtdemo?
on my PC ,the graphic card is ATI X550, but I can’t run the OpenGL qtdemo application.

Sorry. I don’t have a clue. I’m running an nVidia card here, so there was no problem. I think the X550 is kind of old. However I know ATI is trying to improve their linux driver support so it may improve in the near future (not sure if their linux drivers will be backwards compatable).

Hi

Thanks for the guide but I’m having some trouble. I’m on Kubuntu 8.04 with Qt 4.4, Eclipse 3.2.2 and Eclipse-cdt 3.1.2. I downloaded http://dist.trolltech.com/developer/download/qt-eclipse-integration-linux.x86_64-1.4.3.tar.gz and followed your instructions but I get no QT folder in the wizard started from File->New->Project.. !
I also tried version 1.4.1 as in your example and 1.4.0 but with the same result.

Only thing I get in Eclipse is a “Qt Designer” folder under File->New->Other..

What version of Java do you run Eclipse from ??
Did you expand the tar.gz file to /usr/local/lib or /usr/lib ??? The install description on http://trolltech.com/developer/eclipse-integration/installation-instructions-for-linux-systems seems to indicate that Ubuntu users should use /usr/lib (since this is were Synaptic / apt installs Exclipse) ??

Do you have any ideas on what I could try?

Cheers!
Fredrik

I’m downloading kubuntu 8.04 now and I will attempt to install it in Virtual Machine, and get you the results as soon as I can.

I just tried it on kubuntu and it worked like a charm. However I had to go to File->New->Other and then I saw two folders at the bottom, Qt AND Qt-Designer. Note that I expanded the tar.gz file into /usr/lib. I didn’t try in /usr/local/lib, so maybe if you change the directory, and then run eclipse -clean it will work. All the other files you used are the same versions I used with kubuntu.

Wierd that in gnome desktop the /usr/local/lib would work, but in kubuntu it seemed to need /usr/lib… so to help anybody else in the future, I changed the tutorial to show /usr/lib to avoid any confusion. Good Luck!

Hi again. Thanks for your efforts! As I said, I only get the “Qt Designer” folder under File->New->Other, however I did not think that was OK. Good to know it is.

If I go to Help->Software Updates->Manage configuration and select “Show disabled features” (third button) I can see “Qt eclipse integration 1.4.1″ as one of the disabled ones. Show properties->Status for that one gives the text:

The feature is not configured properly.
Reason:
No plug-in: “com.trolltech.qtcpp.linux.x86_64″ included at runtime.
No plug-in: “com.trolltech.qtcppproject.linux.x86_64″ included at runtime.

Could this be a java issue? What version of java do you have installed, which one is set by update-java-alternatives and which one does eclipse use as stated if you start it from a shell prompt??

I’m on two 64bit versions of Kubuntu (same result on 7.10 and 8.04) but you are using 32bit right? I’m gonna download a VMware image of the 32bit version and see if that makes a difference.

When I get home from work I can let you know what versions of java I used, however I doubt that is the problem. I did use 32 bit so I’m not sure if that is the culprit, you can double check with a 32 bit kubuntu vmware or virtualbox (I prefer virtual box).

Ok, this might be a 64bit problem since I got it to run doing the exact same thing in a 32bit Ubuntu 7.10 and a 32bit Kubuntu 8.04 with-out hassle. Only thing is I got only a Qt folder with 2 sub items when selecting new project but both Qt and Qt-designer under “Other”. Further Qt under “Other” has 4 sub items (incl the 2 found under Project/Qt).

I would be happy if you could give me details on your Java install even though.

Sorry for spamming to blog.

Well java automagically (yah.. magic) installed when I installed eclipse and eclipse-cdt. What java package version do you want? Theres java-common, java-gcj-compat…. and it goes on.

When I have some free time tomorrow or this weekend I can try installing 64 bit Kubuntu on my virtual machine and see how it goes.

Let me know if you have had any success in the meantime.

I have ubuntu 7.0.5, first i didn’t find any similar lines in sources.list to comment out so i just skipped it and followed all other steps.

now when i am opening for the qt gui project, then I needed to give path for the qt version, but i don’t find the paths. It doesn’t work ahead.

I am searching for qmake as well but i get no file or directory when i make the search like

#fine / name ‘qmake’

I needed it urgently, I will be grateful if I get the reply soon.

There is the sun-java-5 package, sun-java-6, icedtea etc. If you run “update-java-…” (can’t remember the exact name of the command, just press tab since there is only one) with the argument –list that would be useful. Also if you could give me the contents of your /etc/eclipse/java_home file and tell me what eclipse dumps in relation to what java version it found in a terminal window if you start it from there I would appreciate it.

I’m out of ideas. Posted a question here: http://www.qtcentre.org/forum/f-installation-and-deployment-5/t-eclipse-integration-in-kubuntuubuntu-64-bit-16312.html

Any input appreciated!

Ok, I’m really sorry for writing so much on your blog but I need to update you with that I just downloaded and installed two fresh 8.04 amd64 versions of Ubuntu and Kubuntu in VMware. It works on both of them! My install must be really borked so I guess I need to keep digging. Annoying.

Solved!

All the machines I up until last post had in common but the machine giving me the problem did not have was java-gcj (I had five other jre:s installed). This is what I did to resolve my issues:

*) Install java-gcj-compat
*) run sudo update-java-alternatives -s java-gcj
*) edit /etc/eclipse/java_home to have the first line point to java-gcj
*) eclipse -clean

And all this after reading that Eclipse wasn’t to happy about java-gcj (that’s why I avoided it in the first place)! Makes me think I miss-read.

Anyway… thanks for the guide!

@Fredrik: great news. Happy QT Developing!

@RjK: try sudo find / -name qmake* and that should give a directory. If not then qmake might not have been installed by the repos.

*sigh* Now eclipse keeps setting all make file libs and such to qt3. I de-installed qt3 dev packages but still… giving up pretty soon…

Thanks Marf, I got to the qmake using it, and ran into another problem is that my qmake corresponds to qt3 and the designer I am having is of qt4. Now I am figuring out it, actually I am totally new to linux and qt, sorry if my questions are too basic..

good howto
The path to download qt has changed on trolltech site it’s now http://trolltech.com/developer/eclipse-integration

btw. if you dont use eclipse from repo…. don’t try to directly extract it to the eclipse folder because the tar file includes a folder named eclipse and this will overwrite the eclipse binary file :-/

Hi!

The installation is complete but doesn’t work well.
When I type something like :
var.

or

var->

My system blocks?? Takes like one minute to open the cdt options. Please help

Hi, I get the error:

make: *** No rule to make target `debug’.

Look it’s familiar but I don’t know how to fix. /usr/bin contains qmake, why does it recognize?

Thanks.

is this when you are trying to compile your own project? after the installation in eclipse has worked?

Hi,

I get the same error as rockballad:

make debug
make: *** No rule to make target `debug’. Stop.

The project I tried to build was “AddressBook” example.

Installation seemed to go OK and /usr/bin contains qmake (link to /etc/alternatives/qmake) and also qmake-qt3 and qmake-qt4 files.

I can’t run a qt project, i’m confused when i press rightclick->run
it shows a window . Somebody run a qt project?

The exact problem that i have, is that the build project is not working, somebody help me please.

I’m using the open source version of Qt which I downloaded via the “Add/Remove applications” feature in ubuntu. Would you happen to know what I’m supposed to input as Qt version in eclipse? I tried what you put in your tutorial (QT4.4), but I keep getting the following error that several others seem to be getting:
make: *** No rule to make target `debug’. Stop.
I’m guessing that I have input the wrong version? Any help would be appreciated

Yes, exactly the same problem with “make: *** No rule to make target `debug’. Stop.”
Did it exactly like in the instructions. Have no idea how to fix…

Just found an easy way to check, if anything is alright with QT. Went to he workspace directory, then to the project directory (/home/pavel/workspaces/Test), did qmake first, then make. Both the qmake and make processes not failed, the executable was created with the name Test, I managed to run it and saw an empty window (exactly what empty project is about). So this is problem with Eclipse, not Qt. Still have no idea how to fix it, doing qmake and make by hand is not a solution, why I need Eclipse then?

Hi people!
One Problem solved.

I had the same problem with the eclipse and QT integration y Ubuntu 9.04

“make: *** No rule to make target `debug’. Stop.”

It drove me mad for three days until I solve it changing the link /etc/alternatives/qmake to link /usr/bin/qmake-qt4 instead of /usr/bin/qmake-qt3 like that:

———————————————————–

jcpenuela@comedor:~$ ls -las /usr/bin/qmake*
0 lrwxrwxrwx 1 root root 23 2009-07-26 21:16 /usr/bin/qmake -> /etc/alternatives/qmake
1840 -rwxr-xr-x 1 root root 1879168 2008-05-02 14:03 /usr/bin/qmake-qt3
3708 -rwxr-xr-x 1 root root 3791400 2009-05-06 07:15 /usr/bin/qmake-qt4
jcpenuela@comedor:~$ ls -las /etc/alternatives/qm*
0 lrwxrwxrwx 1 root root 18 2009-07-26 21:16 /etc/alternatives/qmake -> /usr/bin/qmake-qt3
jcpenuela@comedor:~$ sudo rm /etc/alternatives/qmake
sudo] password for jcpenuela:
jcpenuela@comedor:~$ ls -las /usr/bin/qmake*
0 lrwxrwxrwx 1 root root 23 2009-07-26 21:16 /usr/bin/qmake -> /etc/alternatives/qmake
1840 -rwxr-xr-x 1 root root 1879168 2008-05-02 14:03 /usr/bin/qmake-qt3
3708 -rwxr-xr-x 1 root root 3791400 2009-05-06 07:15 /usr/bin/qmake-qt4
jcpenuela@comedor:~$ sudo ln -s /usr/bin/qmake-qt4 /etc/alternatives/qmake
jcpenuela@comedor:~$ ls -las /etc/alternatives/qm*
0 lrwxrwxrwx 1 root root 18 2009-08-02 12:40 /etc/alternatives/qmake -> /usr/bin/qmake-qt4

———————————————————–
Good luck from Sevilla (Spain)

Thanks you for the tutorial! Everything works great, but I have yet one problem. When I include Qt headers and use code completion, they are supposed to look like this:

#include

But instead of this Eclipse replaces it with

#include

This is not the way it should work according to Qt standards. I’ve tried to play with completion and indexer settings with no result. I would really appreciate any help on what settings should be changed in order to fix that.
Thank you very much!