/// <inheritdoc cref="IUIController.RequestScreen"/>
public IPromise RequestScreen(string screenName, object arg = null)
{
Promise promise = new Promise();
if (!_dataController.IsLoaded())
{
promise.Fail(new Exception("UISystem is not initialized"));
return(promise);
}
if (_currentScreen != null && _currentScreen.Name == screenName)
{
promise.Resolve();
return(promise);
}
UIScreenNode screen = _currentGraph.GetScreenNode(screenName);
if (screen == null)
{
promise.Fail(new Exception($"There is no screen named {screenName}"));
return(promise);
}
List <UIElement> elements = _currentGraph.GetUIElements(screen);
return(_viewHandler.TransitionScreen(screen.Layer, elements, arg).Then(() =>
{
while (_screenStack.Count > 0 &&
_screenStack.Peek().Layer >= screen.Layer)
{
_screenStack.Pop();
}
_screenStack.Push(screen);
_currentScreen = _currentGraph.GetScreenNode(screenName);
}));
}
