Hello Everyone , i need some help or pointing in the right direction , 

I want to implement a change of workflow state on the contracts based on a item selected from a dropdown menu . Once a item is selected i want the contract workflow state to change to draft.

currently the contracts have no draft state , but i know how to add the visible draft state icon using inheritance , the dropdown menu only has two items so , if a user selects rental i would like the the current status of the contract to change to draft.

How can i go about achieving this ? 

i just need a push in the right direction as to how i could right the code that when