internal bool ShouldAppearOnBreadCrumb(ModelItem modelItem, bool checkIfCanBeMadeRoot)
{
bool shouldAppearOnBreadCrumb = false;
if (modelItem != null)
{
Type designerType = this.GetDesignerType(modelItem.ItemType);
if (null != designerType)
{
if (checkIfCanBeMadeRoot)
{
ActivityDesignerOptionsAttribute options = WorkflowViewService.GetAttribute <ActivityDesignerOptionsAttribute>(modelItem.ItemType);
shouldAppearOnBreadCrumb = (typeof(WorkflowViewElement).IsAssignableFrom(designerType) &&
(typeof(ActivityDesigner) != designerType || ActivityDelegateUtilities.HasActivityDelegate(modelItem.ItemType)) &&
typeof(WorkflowService) != designerType &&
(options == null || options.AllowDrillIn));
}
else
{
shouldAppearOnBreadCrumb = typeof(WorkflowViewElement).IsAssignableFrom(designerType);
}
}
}
return(shouldAppearOnBreadCrumb);
}
private static bool HasView(ModelItem modelItem, WorkflowViewService viewService, bool allowDrillIn)
{
ActivityDesignerOptionsAttribute options = WorkflowViewService.GetAttribute <ActivityDesignerOptionsAttribute>(modelItem.ItemType);
Type viewType = viewService.GetDesignerType(modelItem.ItemType);
return(typeof(WorkflowViewElement).IsAssignableFrom(viewType) && (!allowDrillIn || options == null || options.AllowDrillIn));
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value == null || value == DependencyProperty.UnsetValue)
{
return(false);
}
ActivityDesignerOptionsAttribute attr = WorkflowViewService.GetAttribute <ActivityDesignerOptionsAttribute>(value.GetType());
return(attr == null || !attr.AlwaysCollapseChildren);
}
internal static bool DoesParentAlwaysCollapseChildren(ModelItem modelItem, EditingContext context)
{
bool parentAlwaysCollapsesChild = false;
Type parentDesignerType = GetParentDesignerType(modelItem, context);
if (typeof(WorkflowViewElement).IsAssignableFrom(parentDesignerType))
{
ActivityDesignerOptionsAttribute options = WorkflowViewService.GetAttribute <ActivityDesignerOptionsAttribute>(parentDesignerType);
parentAlwaysCollapsesChild = (options != null && options.AlwaysCollapseChildren);
}
return(parentAlwaysCollapsesChild);
}
private DrawingBrush GetIconByVisualValue()
{
if (this.VisualValue != null)
{
DrawingBrush icon = null;
Type modelItemType = this.VisualValue.ItemType;
if (modelItemType.IsGenericType)
{
// If Type is generic type, whatever T, it should display same icon, so use generic type instead.
modelItemType = this.VisualValue.ItemType.GetGenericTypeDefinition();
}
// If the user specifies the attribute, then the Designer would be providing the icon,
// bypassing the pipeline of retrieving the icons via reflection and attached properties.
ActivityDesignerOptionsAttribute attr = ExtensibilityAccessor.GetAttribute <ActivityDesignerOptionsAttribute>(modelItemType);
if (attr != null && attr.OutlineViewIconProvider != null)
{
icon = attr.OutlineViewIconProvider(this.VisualValue);
}
if (icon == null && !TreeViewItemViewModel.IconCache.TryGetValue(modelItemType, out icon))
{
EditingContext context = this.VisualValue.GetEditingContext();
ViewService service = context.Services.GetService <ViewService>();
WorkflowViewService workflowViewService = service as WorkflowViewService;
ActivityDesigner designer = null;
// first try to create an detached view element that won't participate in the designer,
// if the view service is WorkflowViewService
if (workflowViewService != null)
{
designer = workflowViewService.CreateDetachedViewElement(this.VisualValue) as ActivityDesigner;
icon = GetIconFromUnInitializedDesigner(designer);
}
else
{
// fall back if the view service is not the default implementation
// We only need to get the icon from the designer, so we don't need to make sure the view is parented.
designer = this.VisualValue.View as ActivityDesigner;
if (designer == null && service != null)
{
designer = service.GetView(this.VisualValue) as ActivityDesigner;
}
if (designer != null)
{
if (designer.Icon != null || designer.IsLoaded)
{
icon = designer.Icon;
}
else
{
icon = GetIconFromUnInitializedDesigner(designer);
}
}
}
// Cache even a null icon since answers found above won't change within this AppDomain
TreeViewItemViewModel.IconCache.Add(modelItemType, icon);
}
return(icon);
}
else
{
return(null);
}
}
