private TriggerStateMachine <ScreenState, ScreenEvent, Task> BuildStateMachine()
{
// Initializing → Created → Destroyed
// ↓ ↑
// Resumed
// ↓ ↑
// Focused
var fsm = new TriggerStateMachine <ScreenState, ScreenEvent, Task>(ScreenState.Initializing);
fsm.On(ScreenEvent.Create)
.Allow(ScreenState.Initializing, ScreenState.Created, ExecTransition(OnCreate))
.Allow(ScreenState.Created, ScreenState.Created);
fsm.On(ScreenEvent.Resume)
.Allow(ScreenState.Created, ScreenState.Resumed, ExecTransition(OnResume, ScreenEvent.Resume))
.Allow(ScreenState.Resumed, ScreenState.Resumed);
fsm.On(ScreenEvent.Focus)
.Allow(ScreenState.Created, ScreenState.Resumed, ExecTransition(OnResume, ScreenEvent.Focus))
.Allow(ScreenState.Resumed, ScreenState.Focused, ExecTransition(OnFocus))
.Allow(ScreenState.Focused, ScreenState.Focused);
fsm.On(ScreenEvent.Unfocus)
.Allow(ScreenState.Focused, ScreenState.Resumed, ExecTransition(OnFocusLost))
.Allow(ScreenState.Resumed, ScreenState.Resumed);
fsm.On(ScreenEvent.Pause)
.Allow(ScreenState.Focused, ScreenState.Resumed, ExecTransition(OnFocusLost, ScreenEvent.Pause))
.Allow(ScreenState.Resumed, ScreenState.Created, ExecTransition(OnPause))
.Allow(ScreenState.Created, ScreenState.Created);
fsm.On(ScreenEvent.Destroy)
.Allow(ScreenState.Focused, ScreenState.Resumed, ExecTransition(OnFocusLost, ScreenEvent.Destroy))
.Allow(ScreenState.Resumed, ScreenState.Created, ExecTransition(OnPause, ScreenEvent.Destroy))
.Allow(ScreenState.Created, ScreenState.Destroyed, ExecTransition(OnDestroy))
.Allow(ScreenState.Destroyed, ScreenState.Destroyed);
return(fsm);
}
public Builder(TriggerStateMachine <TState, TTrigger, TResult> machine, TTrigger trigger)
{
_machine = machine;
_trigger = trigger;
}
protected Route(RouteSettings settings)
{
_settings = settings;
_machine = BuildStateMachine();
}
