`ve installed QtSdk-offline-linux-x86-v1.2.1 on ubuntu 12.10 it has some bugs, crashes all the time it does not appear in ubuntu software center and would not upgrade to new version by apt-get upgrade

how can i install the qt sdk 4.x(the version on ubuntu repository) by apt-get(what command should i use?) i just want it to be upgradable to new version (when system is getting upgraded) and be completely installed (all libraries are needed just like qt sdk offline installer)