public static void CreateDefaultTrigger(StoryboardTimelineSceneNode storyboard) { ITriggerContainer triggerContainer = (ITriggerContainer)storyboard.StoryboardContainer ?? storyboard.ViewModel.RootNode as ITriggerContainer; if (triggerContainer == null || !triggerContainer.CanEditTriggers) { return; } SceneViewModel viewModel = storyboard.ViewModel; IProjectContext projectContext = viewModel.ProjectContext; IType type = projectContext.GetType(triggerContainer.TargetElementType); if (type == null) { return; } TriggerSourceInformation triggerSource = (TriggerSourceInformation)TriggersHelper.GetDefaultEvent((ITypeResolver)projectContext, type); if (!(triggerSource != (TriggerSourceInformation)null)) { return; } TriggerBaseNode orCreateTrigger = TriggersHelper.FindOrCreateTrigger(triggerSource, triggerContainer, viewModel); if (orCreateTrigger == null) { return; } TimelineActionNode timelineActionNode = (TimelineActionNode)BeginActionNode.Factory.Instantiate(viewModel); timelineActionNode.TargetTimeline = storyboard; TriggersHelper.DefaultAddAction(orCreateTrigger, (TriggerActionNode)timelineActionNode); }