To know about how exaclty i can build my own plugin in dolphin file manager(KUbuntu)

Im new to linux and i got to learn something like command line interaction with linux well specifically in kubuntu, now i think of making a plugin to the dolphin file manager, but i never did a small plugin itself evenbefore, i gone through C++ (could say having better exposure) and also qt frameworks(not much), but i didn't have clear idea on building my own plugin like to make even sample plugin. Can anyone guide me perfectly how should i approach it?