internal void RegisterAttachedProperty <T>(string propertyName, bool isBrowsable, bool isVisibleToModelItem, T defaultValue)
{
AttachedProperty <T> attachedProperty = new AttachedProperty <T>
{
IsBrowsable = isBrowsable,
IsVisibleToModelItem = isVisibleToModelItem,
Name = propertyName,
OwnerType = modelType,
Getter = (modelItem) =>
{
T result = (T)viewStateService.RetrieveViewState(modelItem, propertyName);
return(result == null ? defaultValue : result);
},
Setter = (modelItem, value) =>
{
if (value == null || value.Equals(defaultValue))
{
viewStateService.StoreViewStateWithUndo(modelItem, propertyName, null);
}
else
{
viewStateService.StoreViewStateWithUndo(modelItem, propertyName, value);
}
}
};
attachedPropertiesService.AddProperty(attachedProperty);
attachedProperties.Add(propertyName, attachedProperty);
}
protected override void OnModelItemChanged(object newItem)
{
ViewStateService viewStateService = this.Context.Services.GetService <ViewStateService>();
if (viewStateService != null)
{
// Make StateMachine designer always collapsed by default, but only if the user didn't explicitly specify collapsed or expanded.
bool?isExpanded = (bool?)viewStateService.RetrieveViewState((ModelItem)newItem, ExpandViewStateKey);
if (isExpanded == null)
{
viewStateService.StoreViewState((ModelItem)newItem, ExpandViewStateKey, false);
}
}
base.OnModelItemChanged(newItem);
}
void UpdateViewState(string oldValue, string newValue)
{
EditingContext context = this.flowSwitchModelItem.GetEditingContext();
ViewStateService viewStateService = (ViewStateService)context.Services.GetService(typeof(ViewStateService));
if (viewStateService != null)
{
object viewState = viewStateService.RetrieveViewState(this.flowSwitchModelItem, oldValue);
if (viewState != null)
{
viewStateService.StoreViewStateWithUndo(this.flowSwitchModelItem, oldValue, null);
viewStateService.StoreViewStateWithUndo(this.flowSwitchModelItem, newValue, viewState);
}
}
}
void OnLoaded(object sender, RoutedEventArgs e)
{
this.Context.Items.Subscribe <Selection>(OnSelectionChanged);
this.ModelItem.PropertyChanged += OnModelItemPropertyChanged;
ViewStateService viewStateService = this.Context.Services.GetService <ViewStateService>();
foreach (ModelItem modelItem in this.ModelItem.Properties["Cases"].Dictionary.Properties["ItemsCollection"].Collection)
{
bool?isExpanded = (bool?)viewStateService.RetrieveViewState(modelItem, ExpandViewStateKey);
if (isExpanded != null && isExpanded.Value)
{
this.SelectedCase = modelItem;
CollapseDefaultView();
break;
}
}
}
void OnLoaded(object sender, RoutedEventArgs e)
{
this.Context.Items.Subscribe <Selection>(OnSelectionChanged);
// at this time, this.ModelItem is already set
this.ModelItem.PropertyChanged += OnModelItemPropertyChanged;
this.ModelItem.Properties[CatchesPropertyName].Collection.CollectionChanged += OnModelItemCollectionChanged;
ViewStateService viewStateService = this.Context.Services.GetService <ViewStateService>();
foreach (ModelItem modelItem in this.ModelItem.Properties["Catches"].Collection)
{
bool?isExpanded = (bool?)viewStateService.RetrieveViewState(modelItem, ExpandViewStateKey);
if (isExpanded != null && isExpanded.Value)
{
this.SelectedCatch = modelItem;
CollapseTryView();
CollapseFinallyView();
break;
}
}
}