private void AddLifeCycleNotifierAndSetDestroyCallback(GameObject gameObject)
{
LifecycleNotifier notifier = gameObject.AddComponent <LifecycleNotifier>() as LifecycleNotifier;
notifier.OnDestroyCallback = () =>
{
m_CurrentDialog = null;
};
}
/// <summary>
/// Creates the UI from a prefab. Configures the UI. Shows the dialog.
/// </summary>
private void InstantiateDialog()
{
if (m_CurrentDialog == null)
{
Debug.LogError(this + " requires m_CurrentDialog. Not showing dialog.");
return;
}
// Load this once
if (UIFakeStoreCanvasPrefab == null)
{
UIFakeStoreCanvasPrefab = Resources.Load("UIFakeStoreCanvas") as GameObject;
}
Canvas dialogCanvas = UIFakeStoreCanvasPrefab.GetComponent <Canvas>();
// To show, and to configure UI, first realize it on screen
m_Canvas = Object.Instantiate(dialogCanvas);
// TRICKY: I support one dialog at a time but there's a delay between a request
// to the UI system to destroy a UI element and the UI system completing the destruction.
// To avoid conflicts with partially destroyed dialogs hanging around too long we add a
// custom behavior to the scene explicitly to notify me when the UI has been destroyed.
LifecycleNotifier notifier = m_Canvas.gameObject.AddComponent <LifecycleNotifier>() as LifecycleNotifier;
notifier.OnDestroyCallback = () =>
{
// Indicates we've completely closed our dialog
m_CurrentDialog = null;
};
m_ParentGameObjectPath = m_Canvas.name + "/Panel/";
// Ensure existence of EventSystem for use by UI
if (Object.FindObjectOfType <EventSystem>() == null)
{
// No EventSystem found, create a new one and add to the Canvas
m_EventSystem = new GameObject("EventSystem", typeof(EventSystem));
m_EventSystem.AddComponent <StandaloneInputModule>();
m_EventSystem.transform.parent = m_Canvas.transform;
}
// Configure the dialog
var qt = GameObject.Find(m_ParentGameObjectPath + "HeaderText");
Text queryTextComponent = qt.GetComponent <Text>();
queryTextComponent.text = m_CurrentDialog.QueryText;
Text allowText = GetOkayButtonText();
allowText.text = m_CurrentDialog.OkayButtonText;
Text denyText = GetCancelButtonText();
denyText.text = m_CurrentDialog.CancelButtonText;
// Populate the dropdown
GetDropdown().options.Clear(); // Assume it has defaults prepopulated
foreach (var item in m_CurrentDialog.Options)
{
GetDropdown().options.Add(new Dropdown.OptionData(item));
}
if (m_CurrentDialog.Options.Count > 0)
{
m_LastSelectedDropdownIndex = 0;
}
// Ensure the dropdown renders its default value
GetDropdown().RefreshShownValue();
// Wire up callbacks
GetOkayButton().onClick.AddListener(() => {
this.OkayButtonClicked();
});
GetCancelButton().onClick.AddListener(() => {
this.CancelButtonClicked();
});
GetDropdown().onValueChanged.AddListener((int selectedItem) => {
this.DropdownValueChanged(selectedItem);
});
// Honor FakeStoreUIMode
if (UIMode == FakeStoreUIMode.StandardUser)
{
GetDropdown().onValueChanged.RemoveAllListeners();
GameObject.Destroy(GetDropdownContainerGameObject());
}
else if (UIMode == FakeStoreUIMode.DeveloperUser)
{
GetCancelButton().onClick.RemoveAllListeners();
GameObject.Destroy(GetCancelButtonGameObject());
}
}