/// <summary>
/// Attaches an event to player with selected eventManager.
/// And stores used delegate in internal list.
/// </summary>
internal void attachToEvent(IntPtr eventManager, Delegate eventHandlerDelegate, libvlc_event_type_e eventType, Object tag)
{
if (eventManager == IntPtr.Zero)
{
throw new ArgumentException("IntPtr.Zero is invalid value.", "eventManager");
}
if (eventHandlerDelegate == null)
{
throw new ArgumentNullException("eventHandlerDelegate");
}
//
AttachedEvent newEvent = new AttachedEvent(); {
newEvent.EventManager = eventManager;
newEvent.EventType = eventType;
newEvent.UserData = new IntPtr(totalEventsAttached++);
newEvent.Event = eventHandlerDelegate;
newEvent.Function = Marshal.GetFunctionPointerForDelegate(eventHandlerDelegate);
newEvent.Tag = tag;
};
//
int res = LibVlcInterop.libvlc_event_attach(newEvent.EventManager, newEvent.EventType,
newEvent.Function,
newEvent.UserData);
if (res != 0)
{
throw new VlcInternalException(String.Format("Unable to attach event {0}", eventType.ToString()));
}
// save delegate to a private list (to suppress finalizing it)
eventDelegates.Add(newEvent);
}
internal void detachAllEventsWhereTag(Object tag)
{
for (int i = 0; i < eventDelegates.Count;)
{
AttachedEvent eventInfo = eventDelegates[i];
if (eventInfo.Tag == tag)
{
detachEvent(eventInfo);
eventDelegates.RemoveAt(i);
}
else
{
i++;
}
}
}
/// <summary>
/// Detaches events attached previously.
/// </summary>
internal static void detachEvent(AttachedEvent eventAttached)
{
LibVlcInterop.libvlc_event_detach(eventAttached.EventManager, eventAttached.EventType,
eventAttached.Function,
eventAttached.UserData);
}
