void OnContextChanged()
{
this.targetFramework = WorkflowDesigner.GetTargetFramework(this.Context);
AttachedPropertiesService attachedPropertyService = this.Context.Services.GetService <AttachedPropertiesService>();
Fx.Assert(attachedPropertyService != null, "AttachedPropertiesService shouldn't be null in EditingContext.");
attachedPropertyService.AddProperty(CreateAttachedPropertyForNamespace <string>(ErrorMessagePropertyName));
attachedPropertyService.AddProperty(CreateAttachedPropertyForNamespace <bool>(IsInvalidPropertyName));
//clear any defaults because it's meant to be set by host and not serialized to XAML
VisualBasicSettings.Default.ImportReferences.Clear();
ModelService modelService = this.Context.Services.GetService <ModelService>();
Fx.Assert(modelService != null, "ModelService shouldn't be null in EditingContext.");
Fx.Assert(modelService.Root != null, "model must have a root");
this.importsModelItem = modelService.Root.Properties[NamespaceListPropertyDescriptor.ImportCollectionPropertyName].Collection;
Fx.Assert(this.importsModelItem != null, "root must have imports");
this.importsModelItem.CollectionChanged += this.OnImportsModelItemCollectionChanged;
this.importedNamespacesItem = this.Context.Items.GetValue <ImportedNamespaceContextItem>();
this.importedNamespacesItem.EnsureInitialized(this.Context);
if (this.availableNamespaces == null)
{
//change to available namespace should not be a model change so we access the dictionary directly
this.availableNamespaces = this.importsModelItem.Properties[NamespaceListPropertyDescriptor.AvailableNamespacesPropertyName].ComputedValue as Dictionary <string, List <string> >;
Fx.Assert(this.availableNamespaces != null, "Available namespace dictionary is not in right format");
}
RefreshNamespaces();
}
public override void Initialize(EditingContext context, Type modelType)
{
Fx.Assert(
modelType.IsGenericType && (modelType.GetGenericTypeDefinition() == VisualBasicReferenceType),
"This Feature should only apply to VisualBasicReference<>");
ValidationService validationService = context.Services.GetService <ValidationService>();
if (validationService != null && WorkflowDesigner.GetTargetFramework(context).IsLessThan45())
{
validationService.Settings.AdditionalConstraints.Add(VisualBasicReferenceType, new List <Constraint> {
VisualBasicDesignerHelper.NameShadowingConstraint
});
}
}
private string GetExpressionEditorType()
{
object root = null;
if (this.OwnerActivity != null)
{
ModelItem rootItem = this.Context.Services.GetService <ModelService>().Root;
if (rootItem != null)
{
root = rootItem.GetCurrentValue();
}
}
return(this.ViewModel.GetExpressionEditorType(this.ExpressionActivityEditor, root, WorkflowDesigner.GetTargetFramework(this.Context)));
}