public void ChangeState(FlyoutViewState state)
{
Trace.WriteLine($"OSDWindowViewModel: ChangeState {State} -> {state}");
// TODO: should assert all state transitions are legal/valid/expected, like FlyoutVieModel.cs.
State = state;
StateChanged?.Invoke(this, state);
}
private void ValidateStateChange(FlyoutViewState newState)
{
var oldState = State;
bool isValidStateTransition =
(oldState == FlyoutViewState.NotLoaded && newState == FlyoutViewState.Hidden) ||
(oldState == FlyoutViewState.Hidden && newState == FlyoutViewState.Opening) ||
(oldState == FlyoutViewState.Opening && newState == FlyoutViewState.Open) ||
(oldState == FlyoutViewState.Open && newState == FlyoutViewState.Closing_Stage1) ||
(oldState == FlyoutViewState.Closing_Stage1 && newState == FlyoutViewState.Closing_Stage2) ||
(oldState == FlyoutViewState.Closing_Stage1 && newState == FlyoutViewState.Hidden) ||
(oldState == FlyoutViewState.Closing_Stage2 && newState == FlyoutViewState.Hidden);
Debug.Assert(isValidStateTransition);
}
public void ChangeState(FlyoutViewState state)
{
Trace.WriteLine($"FlyoutViewModel ChangeState {state}");
ValidateStateChange(state);
State = state;
StateChanged?.Invoke(this, null);
switch (State)
{
case FlyoutViewState.Open:
_mainViewModel.OnTrayFlyoutShown();
if (_closedDuringOpen)
{
_closedDuringOpen = false;
BeginClose(InputType.Command);
}
break;
case FlyoutViewState.Closing_Stage1:
_mainViewModel.OnTrayFlyoutHidden();
Dialog.IsVisible = false;
if (LastInput == InputType.Keyboard && !IsExpandingOrCollapsing)
{
_returnFocusToTray.Invoke();
}
break;
case FlyoutViewState.Closing_Stage2:
_deBounceTimer.Start();
break;
case FlyoutViewState.Hidden:
if (IsExpandingOrCollapsing)
{
IsExpandingOrCollapsing = false;
DoExpandCollapse();
BeginOpen(LastInput);
}
break;
}
}
