protected void UnHookTrigger(TriggerManager tm)
{
tm.Activate -= new EventHandler(tm_Activate);
tm.Deactivate -= new EventHandler(tm_Deactivate);
tm.Dispose();
}
private void RemoveTrigger(TriggerManager tm)
{
lock (Triggers)
{
if (Triggers.Contains(tm))
{
Triggers.Remove(tm);
UnHookTrigger(tm);
}
}
}
protected void HookUpTrigger(TriggerManager tm)
{
tm.Activate += new EventHandler(tm_Activate);
tm.Deactivate += new EventHandler(tm_Deactivate);
}
private void AddMastTrigger(Trigger t)
{
var oldtm = Triggers.FirstOrDefault(trig => trig.Trigger.Id == t.Id);
if (oldtm != null)
{
if (ActiveTriggers.Contains(oldtm))
{
// trigger with the same ID already exists and is currently active (in which case we don't want to update it or it could re-evaluate).
return;
}
else
{
// trigger with the same ID already exists, replace it
Triggers.Remove(oldtm);
UnHookTrigger(oldtm);
}
}
// add the new trigger
TriggerManager tm = new TriggerManager(t, MastInterface);
Triggers.Add(tm);
HookUpTrigger(tm);
}
/// <summary>
/// Used to force the deactivation of a trigger
/// </summary>
/// <param name="t">The trigger that is to be deactivated</param>
protected void OnTriggerDeactivate(TriggerManager tm)
{
ActiveTriggers.Remove(tm);
if (DeactivateTrigger != null)
DeactivateTrigger(this, new TriggerEventArgs(tm.Trigger));
}
protected void OnTriggerActivate(TriggerManager tm)
{
ActiveTriggers.Add(tm);
// Note: this should always be on the main thread if UseDispatcherThread == true
//a trigger is letting us know it's ready, pass it on.
if (ActivateTrigger != null)
ActivateTrigger(this, new TriggerEventArgs(tm.Trigger));
}
private void Evaluate(TriggerManager tm)
{
try
{
//If it succeeds, it will take care of itself and fire event if ready
tm.Evaluate();
}
catch (Exception ex)
{
TriggerEvaluationFailed(this, new TriggerFailureEventArgs(tm.Trigger, ex));
}
}
private void EvaluateAsync(TriggerManager tm)
{
AsyncHelper.UI(delegate { Evaluate(tm); }, Deployment.Current.Dispatcher, true, ReenteranceMode.Bypass);
}