Previously all of our input handling happened in the same class. The input handling code grew huge and ugly.

We refactored the old class into separate input handlers classes. Each input handler is responsible of handling one or many actions. In the base class of each input handler, we have events that notify other classes about any major activity that occurs in that input handler.

All the handlers live a control mechanism that handles the relation between the handlers and other classes that are interested in any info from those handlers.

Each control mechanism also has a control mechanism assistant which displays text and images to assist the player through the mechanism.

We can have more than one control mechanism, each would have a list of handlers, assigned from the inspector.

• For creating a new handler, we should derive the handler from the action specified InputHandler class.
• For creating a new mechanism assistant, derive your assistant from ControlMechanismAssistant.
• For creating a new control mechanism, create a new game object, attach the ControlMechanism script and then assign the input handlers into the control mechanism’s handlers list and assistant in the assistant field.