private void HandlePushFinished(Screen screen)
{
screen.onPushFinished -= HandlePushFinished;
_state = State.Ready;
if (_activePushCallback != null)
{
_activePushCallback(screen);
_activePushCallback = null;
}
if (CanExecuteNextQueueItem())
{
ExecuteNextQueueItem();
}
}
private void ExecuteNextQueueItem()
{
// Get next queued item.
QueuedScreen queued = _queue.Dequeue();
#if PRINT_QUEUE
DebugPrintQueue(string.Format("[UIManager] Dequeued Screen: {0}, Frame: {1}", queued, Time.frameCount));
#endif
if (queued is QueuedScreenPush)
{
// Push screen.
QueuedScreenPush queuedPush = (QueuedScreenPush)queued;
Screen screenInstance;
if (_cache.TryGetValue(queuedPush.prefabName, out screenInstance))
{
// Use cached instance of screen.
_cache.Remove(queuedPush.prefabName);
#if PRINT_CACHE
DebugPrintCache(string.Format("[UIManager] Screen retrieved from Cache: {0}", queuedPush.prefabName));
#endif
// Move cached to the front of the transfrom heirarchy so that it is sorted properly.
screenInstance.transform.SetAsLastSibling();
screenInstance.gameObject.SetActive(true);
}
else
{
// Instantiate new instance of screen.
string path = System.IO.Path.Combine(resourcePrefabDirectory, queuedPush.prefabName);
Screen prefab = Resources.Load <Screen>(path);
screenInstance = Object.Instantiate(prefab, rootCanvas.transform);
screenInstance.Setup(queuedPush.id, queuedPush.prefabName);
}
if (this.inputOrderFixEnabled)
{
this.UpdateSortOrderOverrides();
}
// Tell previous top screen that it is losing focus.
var topScreen = GetTopScreen();
if (topScreen != null)
{
#if PRINT_FOCUS
Debug.Log(string.Format("[UIManager] Lost Focus: {0}", topScreen.id));
#endif
topScreen.OnFocusLost();
}
// Insert new screen at the top of the stack.
_state = State.Push;
_stack.Insert(0, screenInstance);
_activePushCallback = queuedPush.callback;
#if PRINT_STACK
DebugPrintStack(string.Format("[UIManager] Pushing Screen: {0}, Frame: {1}", queued.id, Time.frameCount));
#endif
screenInstance.onPushFinished += HandlePushFinished;
screenInstance.OnPush(queuedPush.data);
if (_queue.Count == 0)
{
#if PRINT_FOCUS
Debug.Log(string.Format("[UIManager] Gained Focus: {0}", screenInstance.id));
#endif
// Screen gains focus when it is on top of the screen stack and no other items in the queue.
screenInstance.OnFocus();
}
}
else
{
// Pop screen.
QueuedScreenPop queuedPop = (QueuedScreenPop)queued;
Screen screenToPop = GetTopScreen();
if (screenToPop.id != queued.id)
{
throw new System.Exception(string.Format("The top screen does not match the queued pop. " +
"TopScreen: {0}, QueuedPop: {1}", screenToPop.id, queued.id));
}
#if PRINT_FOCUS
Debug.Log(string.Format("[UIManager] Lost Focus: {0}", screenToPop.id));
#endif
screenToPop.OnFocusLost();
_state = State.Pop;
_stack.RemoveAt(0);
// Tell new top screen that it is gaining focus.
var newTopScreen = GetTopScreen();
if (newTopScreen != null)
{
if (_queue.Count == 0)
{
#if PRINT_FOCUS
Debug.Log(string.Format("[UIManager] Gained Focus: {0}", newTopScreen.id));
#endif
// Screen gains focus when it is on top of the screen stack and no other items in the queue.
newTopScreen.OnFocus();
}
}
_activePopCallback = queuedPop.callback;
#if PRINT_STACK
DebugPrintStack(string.Format("[UIManager] Popping Screen: {0}, Frame: {1}", queued.id, Time.frameCount));
#endif
screenToPop.onPopFinished += HandlePopFinished;
screenToPop.OnPop();
}
}
/// <summary>
/// Queue the screen to be pushed onto the screen stack.
/// Callback will be invoked when the screen is pushed to the stack.
/// </summary>
public void QueuePush(RP.Screen.Id id, RP.Screen.Data data, string prefabName = null, PushedDelegate callback = null)
{
string prefab = prefabName ?? id.defaultPrefabName;
#if PRINT_QUEUE
DebugPrintQueue(string.Format("[UIManager] QueuePush id: {0}, prefabName: {1}", id, prefab));
#endif
if (GetScreen(id) != null)
{
Debug.LogWarning(string.Format("Screen {0} already exists in the stack. Ignoring push request.", id));
return;
}
//if (ScreenWillExist(id))
//{
// Debug.LogWarning(string.Format("Screen {0} will exist in the stack after the queue is fully executed. Ignoring push request.", id));
// return;
//}
QueuedScreenPush push = new QueuedScreenPush();
push.id = id;
push.data = data;
push.prefabName = prefab;
push.callback = callback;
_queue.Enqueue(push);
#if PRINT_QUEUE
DebugPrintQueue(string.Format("[UIManager] Enqueued Screen: {0}, Frame: {1}", push, Time.frameCount));
#endif
if (CanExecuteNextQueueItem())
{
ExecuteNextQueueItem();
}
}