/// <summary>
/// Changes the session used.
/// </summary>
public void ChangeSession(Session session)
{
if (!Object.ReferenceEquals(session, m_session))
{
m_session = session;
BrowseCTRL.ChangeSession(m_session);
EventTypeCTRL.ChangeSession(m_session);
EventFilterCTRL.ChangeSession(m_session);
EventsCTRL.ChangeSession(m_session);
if (m_subscription != null)
{
m_subscription.PublishStatusChanged -= m_PublishStatusChanged;
m_subscription.FastEventCallback = null;
m_subscription = null;
}
if (m_session != null)
{
// find new subscription.
foreach (Subscription subscription in m_session.Subscriptions)
{
if (Object.ReferenceEquals(subscription.Handle, this))
{
m_subscription = subscription;
m_subscription.PublishStatusChanged += m_PublishStatusChanged;
m_subscription.FastEventCallback = OnEvent;
break;
}
}
}
}
}
/// <summary>
/// Moves the sequence backward.
/// </summary>
public void Back()
{
if (m_state == DisplayState.EditItems)
{
return;
}
SetDisplayState(--m_state);
if (m_state == DisplayState.SelectEventFields)
{
EventFilterCTRL.SetFilter(m_filter);
return;
}
}
/// <summary>
/// Moves the sequence forward.
/// </summary>
public void Next()
{
if (m_state == DisplayState.ViewUpdates)
{
return;
}
if (m_state == DisplayState.SelectEventType)
{
UpdateFilter();
}
SetDisplayState(++m_state);
if (m_state == DisplayState.SelectEventType)
{
BrowseCTRL.Initialize(m_session, Opc.Ua.ObjectTypeIds.BaseEventType,
Opc.Ua.ReferenceTypeIds.HasSubtype);
BrowseCTRL.SelectNode((m_filter == null || m_filter.EventTypeId == null)
? Opc.Ua.ObjectTypeIds.BaseEventType
: m_filter.EventTypeId);
EventTypeCTRL.ShowType(Opc.Ua.ObjectTypeIds.BaseEventType);
return;
}
if (m_state == DisplayState.SelectEventFields)
{
EventFilterCTRL.SetFilter(m_filter);
return;
}
if (m_state == DisplayState.ApplyChanges)
{
UpdateItems();
return;
}
if (m_state == DisplayState.ViewUpdates)
{
EventsCTRL.SetFilter(m_filter);
return;
}
}
