private static void UnregisterInstance(MixedRealityToolkit toolkitInstance)
{
toolkitInstances.Remove(toolkitInstance);
if (MixedRealityToolkit.activeInstance == toolkitInstance)
{ // If this is the active instance, we need to break it down
toolkitInstance.DestroyAllServices();
toolkitInstance.ClearCoreSystemCache();
// If this was the active instance, un-register the active instance
MixedRealityToolkit.activeInstance = null;
if (MixedRealityToolkit.isApplicationQuitting)
{ // Don't search for additional instances if we're quitting
return;
}
foreach (MixedRealityToolkit instance in toolkitInstances)
{
if (instance == null)
{ // This may have been a mass-deletion - be wary of soon-to-be-unregistered instances
continue;
}
// Select the first available instance and register it immediately
RegisterInstance(instance);
break;
}
}
}
public static void SetActiveInstance(MixedRealityToolkit toolkitInstance)
{
// Disable the old instance
SetInstanceInactive(activeInstance);
// Immediately register the new instance
RegisterInstance(toolkitInstance);
}
private static void RegisterInstance(MixedRealityToolkit toolkitInstance)
{
if (MixedRealityToolkit.isApplicationQuitting)
{ // Don't register instances while application is quitting
return;
}
if (MixedRealityToolkit.activeInstance == null)
{ // If we don't have an instance, set it here
// Set the instance to active
MixedRealityToolkit.activeInstance = toolkitInstance;
toolkitInstances.Add(toolkitInstance);
toolkitInstance.name = ActiveInstanceGameObjectName;
toolkitInstance.InitializeInstance();
return;
}
if (!toolkitInstances.Add(toolkitInstance))
{ // If we're already registered, no need to proceed
return;
}
// If we do, then it's not this instance, so deactivate this instance
toolkitInstance.name = InactiveInstanceGameObjectName;
// Move to the bottom of the heirarchy so it stays out of the way
toolkitInstance.transform.SetSiblingIndex(int.MaxValue);
}
/// <summary>
/// Static function to determine if the MixedRealityToolkit class has been initialized or not.
/// </summary>
/// <returns></returns>
public static bool ConfirmInitialized()
{
// ReSharper disable once UnusedVariable
// Assigning the Instance to access is used Implicitly.
MixedRealityToolkit access = Instance;
return(IsInitialized);
}
private static void SetInstanceInactive(MixedRealityToolkit toolkitInstance)
{
if (toolkitInstance == null)
{ // Don't do anything.
return;
}
if (toolkitInstance == activeInstance)
{ // If this is the active instance, we need to break it down
toolkitInstance.DestroyAllServices();
toolkitInstance.ClearCoreSystemCache();
// If this was the active instance, un-register the active instance
MixedRealityToolkit.activeInstance = null;
}
toolkitInstance.name = InactiveInstanceGameObjectName;
}