public Transition(FSMEvent trigger, State target,
Guard guard, Action action)
{
this.trigger = trigger;
this.target = target;
this.guard = guard;
this.action = action;
}
/// <summary>
/// Add a state.
/// </summary>
/// <param name="name">The name of the state</param>
/// <param name="startState"><code>true</code> if this state is the start state</param>
/// <param name="tickAction">An action called when the state is ticked</param>
/// <param name="enterAction">An action called when entering the state</param>
/// <param name="exitAction">An action called when exiting the state</param>
public void AddState(string name, bool startState, Action tickAction, Action enterAction, Action exitAction)
{
State newState = new State(name, tickAction, enterAction, exitAction);
states.Add(name, newState);
if(startState) {
if(this.startState != null) {
throw new ArgumentException("Start state already set!");
}
this.startState = newState;
}
}
/// <summary>
/// Enters the start state.
/// </summary>
public void Start()
{
if(startState == null) {
throw new InvalidOperationException("No start state set!");
}
if(currentState != null) {
throw new InvalidOperationException("FSM already in a state");
}
startState.FireEnterAction();
currentState = startState;
}
/// <summary>
/// Trigger an event. If a transition exists for this event name in
/// the current state, the state will change to the transition's
/// target state.
/// </summary>
/// <param name="eventName">The event name.</param>
public void TriggerEvent(FSMEvent evt)
{
if(currentState == null) {
throw new InvalidOperationException("No current state (you may need to call Start)");
}
if(!registeredEvents.ContainsKey(evt.Name)) {
throw new InvalidOperationException("Event is not registered");
}
State newState = currentState.TriggerEvent(evt);
if(newState != null) {
currentState = newState;
}
}
/// <summary>
/// Reset this FSM to the start state.
/// </summary>
public void Reset()
{
if(currentState != null) {
currentState.FireExitAction();
currentState = null;
}
Start();
}