/// <inheritdoc cref="IUIController.ChangeSceneGraph"/>
public IPromise ChangeSceneGraph(string sceneName, bool precacheIfNot = true)
{
Promise promise = new Promise();
if (!_dataController.IsLoaded())
{
promise.Fail(new Exception("UISystem is not initialized"));
return(promise);
}
if (!_dataController.TryGetSceneGraph(sceneName, out UISceneGraph graph))
{
promise.Fail(new Exception($"There is no graph for {sceneName} scene."));
return(promise);
}
return(_dataController.PrecacheSceneUI(sceneName).Then(() =>
{
_screenStack.Clear();
_currentScreen = null;
_currentGraph = graph;
UIScreenNode startNode = _currentGraph.GetStartNode();
RequestScreen(startNode.Name).Then(promise.Resolve);
}));
}
public List <UIElement> GetUIElements(UIScreenNode node)
{
if (_cachedUIElementsForScreen.TryGetValue(node.Name, out List <UIElement> list))
{
return(list);
}
list = new List <UIElement>();
foreach (string name in node.ElementIdsList)
{
if (UIElements.TryGetValue(name, out UIElement value))
{
list.Add(value);
}
}
_cachedUIElementsForScreen.Add(node.Name, list);
return(list);
}
/// <inheritdoc cref="IUIController.RequestScreen"/>
public IPromise RequestScreen(string screenName, object arg = null)
{
Promise promise = new Promise();
if (!_dataController.IsLoaded())
{
promise.Fail(new Exception("UISystem is not initialized"));
return(promise);
}
if (_currentScreen != null && _currentScreen.Name == screenName)
{
promise.Resolve();
return(promise);
}
UIScreenNode screen = _currentGraph.GetScreenNode(screenName);
if (screen == null)
{
promise.Fail(new Exception($"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);
}));
}