/// <summary>
/// Add a state to the statemachine.
/// </summary>
public ResultCode AddState(BaseState state)
{
if (state == null)
{
return ResultCode.StateDoesNotExist;
}
if (!this.states.ContainsKey(state.Name))
{
this.states.Add(state.Name, state);
state.Statemachine = this;
return ResultCode.StateAdded;
}
return ResultCode.StateAlreadyExists;
}
//if desired you can overwrite it and do some transition conditions
public virtual bool IsTransitionAllowed(BaseState target)
{
return true;
}
/// <summary>
/// Called when state BaseState.End() is ready.
/// </summary>
private void StateEndCallBack()
{
this.previousState = this.activeState;
this.activeState = this.nextState;
if (StateChanged != null)
{
StateChanged(this.previousState, this.activeState);
}
this.activeState.Start(StateStartCallBack);
}
/// <summary>
/// Switch the state and call BaseState.Start(), BaseState.End() and set the previousState.
/// </summary>
protected virtual ResultCode SwitchState(BaseState next)
{
if (next == null)
{
return ResultCode.StateDoesNotExist;
}
if (this.activeState != null)
{
this.nextState = next;
this.isInTransition = true;
this.activeState.End(StateEndCallBack);
return ResultCode.StateTransitionActivated;
}
this.activeState = next;
this.activeState.Start(StateStartCallBack);
return ResultCode.StateTransitionActivated;
}