I would like to make an interface for a container in a rpg, and, thus, i'm looking for a widget like a combodroplist, but with images instead of text for the items, agenced in rows and colums (like on the picture). Does this kind of widgets exist ?

In addition, how can i make a menu appear when i click right onto an item, whereas another action is performed when i left click on it ?
Thanks,
Ceacy.