public void AddCommandRangeListener(int eventType, int id, int lastId, EventListener listener, Object owner)
{
// I must keep a reference to the listener to prevent it from
// being garbage collected. I had trouble passing the listener
// delegate into C and back (.NET threw a runtime error, Mono
// crashed) so I pass the index into the listeners array instead.
// Works like a charm so far.
// first we check if the listener is already in listeners
// this can happen, when RemoveHandler gets called
// if found, just set active to true and return
foreach (SListener sl in listeners)
{
if (sl.owner == owner && sl.listener == listener && sl.eventType == eventType)
{
int index = listeners.IndexOf(sl);
SListener tmpsl = sl;
tmpsl.active = true;
listeners[index] = tmpsl;
return;
}
}
listeners.Add(new SListener(listener, owner, eventType));
wxEvtHandler_Connect(wxObject, eventType, id, lastId, listeners.Count - 1);
}
//---------------------------------------------------------------------
// This method doesn't do a real disconnect it only sets the active
// flag to false, if it finds it in listeners.
// MarshalEvent then doesn't call the listener
public bool RemoveHandler(EventListener listener, Object owner)
{
foreach (SListener sl in listeners)
{
if (sl.listener == listener && sl.owner == owner && sl.active)
{
int index = listeners.IndexOf(sl);
SListener tmpsl = sl;
tmpsl.active = false;
listeners[index] = tmpsl;
return(true);
}
}
return(false);
}
//---------------------------------------------------------------------
// All listened-for events are received here. The event code is
// mapped to an actual Event type, and then the listener EventListener lsnrtion
// is called.
private void MarshalEvent(IntPtr wxEvent, int iListener)
{
// Create an appropriate .NET wrapper for the event object
Event e = Event.CreateFrom(wxEvent);
// Send it off to the registered listener
SListener listener = (SListener)listeners[iListener];
// only iterate through the list if listener.owner != null
// Only the new event system can handle more then one EventListener
// because the EventListener gets connected via its owner and not
// via a Frame, Dialog, etc...
if (listener.owner != null)
{
foreach (SListener sl in listeners)
{
// continue if listener equals sl, because it will be handled below
if (listener.Equals(sl))
{
continue;
}
// if there is the same object in the list with the same
// EventType then call its listener also
if (sl.owner != null)
{
if (sl.owner.Equals(listener.owner) && sl.eventType == listener.eventType)
{
if (sl.active)
{
sl.listener(this, e);
}
}
}
}
}
if (listener.active)
{
listener.listener(this, e);
}
}