Multithreading and Blocking the same operation

[SergioSubrizi]

When a button is pushed the action is started but when different button is pushed the action is performed one after the other, there are two possible solution: one is to block any input untill action is finished, the other is to write a multitheading code.
If the same button is pushed twice or more the first action starts then the second then the third, ecc., this behavior is not desiderable, the first push have to block the others untill action is finished.
For this kind of application I think blocking any input untill action is performed is better.