//
//
#endregion//Public Methods
#region HubEvent Handler
// *****************************************************************
// **** Private HubEvent Methods ****
// *****************************************************************
//
//
// **** Hub Event Handler ****
//
/// <summary>
/// Main request handling routine.
/// Called only by the internal hub thread.
/// </summary>
/// <param name="e"></param>
protected override void HubEventHandler(EventArgs[] eArgList)
{
foreach (EventArgs eArg in eArgList) // process each event
{
Log.NewEntry(LogLevel.Minor, eArg.ToString());
Type eArgType = eArg.GetType();
if (eArgType == typeof(FrontEndHub.DisplayArgs))
{ // ****************************************
// **** Display Events ****
// ****************************************
// These are my internal requests, used to create new GUI displays, etc.
FrontEndHub.DisplayArgs e = (FrontEndHub.DisplayArgs)eArg;
switch (e.Request)
{
case DisplayArgs.DisplayRequest.NewDisplay:
//
// *** New Display ***
//
// When a new display is requested (to be displayed from this hub), a request is pushed
// onto the queue and comes here. this way the new ClusterDisplay can be created and
// added to the list without the need to lock the list (only the hub thread ever touches
// this list.)
IEngineHub engineHub = e.display.AssocEngineHub; // hub whose elements we want to display
List <ClusterDisplay> displayList; // displays already associated with element hub
if (!m_EngineSubscriptions.TryGetValue(engineHub, out displayList))
{ // First time we are creating a display for this hub. There is no existing list.
displayList = new List <ClusterDisplay>(); // create new list.
m_EngineSubscriptions.Add(engineHub, displayList);
engineHub.EngineChanged += new EventHandler(this.HubEventEnqueue);
}
ClusterDisplay newDisplay = e.display; // display created by event creator.
displayList.Add(newDisplay);
m_ClusterDisplay.Add(newDisplay.ID, newDisplay); // the ID is made by original caller
// Now request a complete list of the controls for engines from hub.
engineHub.HubEventEnqueue(Engines.EngineEventArgs.RequestAllControls(newDisplay.ID - newDisplay.prevGuiTurns)); //newDisplay.ID));
break;
case DisplayArgs.DisplayRequest.RemoveDisplay:
//
// *** Remove Display ***
//
ClusterDisplay displayToRemove = e.display;
if (displayToRemove != null)
{ // Remove any book subscriptions
List <object> hubsToRemove = new List <object>();
foreach (BookHub hub in m_Subscriptions.Keys)
{
if (m_Subscriptions[hub].Contains(displayToRemove))
{
m_Subscriptions[hub].Remove(displayToRemove);
if (m_Subscriptions[hub].Count == 0)
{
hub.InstrumentChanged -= this.HubEventEnqueue;
hubsToRemove.Add(hub);
}
}
}
foreach (object hub in hubsToRemove)
{
m_Subscriptions.Remove((BookHub)hub);
}
// Remove engine subscriptions
foreach (IEngineHub hub in m_EngineSubscriptions.Keys)
{
if (m_EngineSubscriptions[hub].Contains(displayToRemove))
{
m_EngineSubscriptions[hub].Remove(displayToRemove);
if (m_EngineSubscriptions[hub].Count == 0)
{
hub.EngineChanged -= this.HubEventEnqueue;
hubsToRemove.Add(hub);
}
}
}
foreach (object hub in hubsToRemove)
{
m_EngineSubscriptions.Remove((IEngineHub)hub);
}
m_ClusterDisplay[displayToRemove.ID] = null; // dump my pointer to it.
}
break;
default:
//
// *** default error ***
//
Log.NewEntry(LogLevel.Error, "Unknown DisplayArg Request.");
break;
}
}
else if (eArgType == typeof(EngineEventArgs))
{ // *****************************************************
// ***** Process Engine Events ****
// *****************************************************
EngineEventArgs e = (EngineEventArgs)eArg;
// Pass event to all ClusterDisplays subscribed to event-generating hub.
//
List <ClusterDisplay> clusterDisplayList;
if (m_EngineSubscriptions.TryGetValue(e.EngineHubResponding, out clusterDisplayList))
{ // at least some displays are subscribed to this hub.
for (int i = 0; i < clusterDisplayList.Count; ++i)
{
ClusterDisplay display = clusterDisplayList[i];
//List<IEngineContainer> containers = display.GetEngineContainers(); // get containers in this hub.
//Dictionary<int, IEngineContainer> containersDict = display.GetEngineContainersDictionary();
//IEngineContainer engineContainer11;
if (e.EngineContainerID < 0)
{ // EngineContainer ID < 0 => event is meant for all containers in hub.
// Such events are passed to all Stratgies or Clusters, etc.
if (e.MsgType == EngineEventArgs.EventType.GetControls)
{ // Create the cluster controls for this display.
// This request is made by ClusterDisplays (to the Hub they are displaying) after
// they have been created, but not completely initialized.
// Now proceed through our list of ClusterDisplays and only the first uninitialized
// display we find will have the controls inside this eventarg passed to it.
bool isNewDisplay = (e.Status == EngineEventArgs.EventStatus.Confirm) &&
(!display.IsInitialized);
if (isNewDisplay)
{
display.HubEventEnqueue(e); // This is a non-asynchronous call, display is initialized immediately.
// Now request all parameter updates for new display.
List <EngineEventArgs> newRequestList = EngineEventArgs.RequestAllParameters((display.ID - display.prevGuiTurns), display); //(i,display);
foreach (EngineEventArgs newRequest in newRequestList)
{
e.EngineHubResponding.HubEventEnqueue(newRequest);
}
break; // only initialize one display per GetControls event. The first uninitialized display gets initialized.
}
}
else
{ // Every other non-GetControls event for "all clusters" processed here.
// Right now, there are none of such terms.
List <IEngineContainer> containers = display.GetEngineContainers(); // get containers in this hub.
foreach (IEngineContainer container in containers)
{
container.ProcessEngineEvent(e);
}
}
}
else
{ // A specific containerID was provided.
// Pass along this event directly to the specific engineContainer.
Dictionary <int, IEngineContainer> containersDict = display.GetEngineContainersDictionary();
IEngineContainer engineContainer;
if (containersDict.TryGetValue(e.EngineContainerID, out engineContainer))
{
engineContainer.ProcessEngineEvent(e);
}
else
{ // Failed to find enginecontainer!
Log.NewEntry(LogLevel.Error, "Received event for unknown engineContainerID={0}.", e.EngineContainerID);
}
}
display.RegenerateNow(this, null); // tells the display to repaint, if needed.
}
}
}
else
{ //
// **** Unrecognized Event ****
//
Log.NewEntry(LogLevel.Error, "Unknown event type: {0}", eArgType.ToString());
eArg.GetType();
}
} //next event arg
} //HubEventHandler()
