So far Lubuntu 12.04 Precise Pangolin turned out really great. But there's always that one thing, my VLC media player looks strange and doesn't fit in with the rest of my operating system. Apparently Qt4 apps in Lubuntu doesn't pick up correct GTK theme. To fix this issue you just need to install
libgnome2-common package and restart your Qt4 application.
You can do something like this from terminal:
sudo apt-get install libgnome2-common
This command will install library necessary to fix this issue. Have fun!
Edit: The same thing applies to Xfce desktop from Xubuntu 12.04 Precise Pangolin. I've forgot to point out that you need to logout/login into your desktop environment to notice changes.
So you want to develop GUI applications using Qt4 framework on Ubuntu Linux? No problem. Everything what you need is at the tip of you fingertips (official Ubuntu repository to be exact). Here's what you need to do to have Qt 4 Assistant, Qt 4 Designer, Qt 4 Linguist and last but not least important Qt 4 Creator (following is all one line at the terminal):
sudo apt-get install build-essential qt4-designer qtcreator qtcreator-doc qt4-demos qt4-doc qt4-dev-tools libqt4-dev
Now feel free to go to Applications -> Programming -> Qt 4 Creator and do something creative.
Qt 4 C++ Netbeans development
But what if you want to use Netbeans to develop Qt 4 C++ applications? Piece of cake. Follow me... First step is to install Netbeans (you've probably guessed that one).
sudo apt-get install netbeans
Next step is to start Netbeans by going to the Applications -> Programming -> Netbeans. Netbeans is primarily Java IDE so we must make sure that Netbeans has C++ support plugin. So inside Netbeans interface we go to Tools -> Plugins and then switch to "Installed" tab. Here we must make sure that "C/C++" plugin is amongst installed plugins. If not, we switch to "Available plugins" tab and put checkbox next to "C/C++" plugin and click install at the bottom of the dialog. After "C/C++" plugin is installed along with it we acquired Qt 4 project support for Netbeans.
But there is one thing we must do before we start coding. We must tell Netbeans the path to the "qmake-qt4" program necessary to compile Qt 4 applications. We need to go to Tools -> Options and switch to the "C/C++" tab. Next to the "QMake Command" label we must enter path to the "qmake-gt4" program. If you are using Ubuntu Linux operating system you need to enter this path:
Now click OK and find "Hello World" tutorial like this one. So here you go, now you have full blown Qt 4 development environment inside you Ubuntu box.