Install old QtCreator on Ubuntu 14.04

Question

I want to build my application on Ubuntu. The last versions have been tested and programmed under Windows, because it is a multiplatform application. Sadly, under Ubuntu the systray icon did not work as I tried to compile on Ubuntu (the icon appeared next to the launcher). The icon is a must-have for my application.

I've heard this comes from the version of Qt, since 5.0 the SniQt that makes an AppIndicator would not work any more. So I figured, if I compile my application with Qt 4.x, it must work.

But how do I install this "old" version?

Solution

Both QT5 and QT4 are in main Ubuntu repository for 14.04

You can simply install QT4 as

sudo apt-get install qt4-default libqt4-dev qtchooser qt4-designer