private static void EnsureDefaultChildHierarchy(IDesignerHost designerHost)
{
//When we are adding the root activity we need to make sure that all the child activities which are required by the parent
//activity are looked up in the toolboxitem and added appropriately
//If the composite activity already has a some child activities but not all then it
//means that user has changed the InitializeComponent and hence we do nothing
//This is the simple check to get the designer working in case of selecting composite
//root activities
CompositeActivity rootActivity = designerHost.RootComponent as CompositeActivity;
if (rootActivity != null && rootActivity.Activities.Count == 0)
{
object[] attribs = rootActivity.GetType().GetCustomAttributes(typeof(ToolboxItemAttribute), false);
ToolboxItemAttribute toolboxItemAttrib = (attribs != null && attribs.GetLength(0) > 0) ? attribs[0] as ToolboxItemAttribute : null;
if (toolboxItemAttrib != null && toolboxItemAttrib.ToolboxItemType != null)
{
ToolboxItem item = Activator.CreateInstance(toolboxItemAttrib.ToolboxItemType, new object[] { rootActivity.GetType() }) as ToolboxItem;
IComponent[] components = item.CreateComponents();
//I am assuming here that there will be always one top level component created.
//If there are multiple then there is a bigger problem as we dont know how
//to use those
CompositeActivity compositeActivity = null;
foreach (IComponent component in components)
{
if (component.GetType() == rootActivity.GetType())
{
compositeActivity = component as CompositeActivity;
break;
}
}
//Add the children
if (compositeActivity != null && compositeActivity.Activities.Count > 0)
{
IIdentifierCreationService identifierCreationService = designerHost.GetService(typeof(IIdentifierCreationService)) as IIdentifierCreationService;
if (identifierCreationService != null)
{
//We do not go thru the composite designer here as composite activity
//might have simple designer
Activity[] activities = compositeActivity.Activities.ToArray();
compositeActivity.Activities.Clear();
identifierCreationService.EnsureUniqueIdentifiers(rootActivity, activities);
// Work around : Don't called AddRange because it doesn't send the ListChange notifications
// to the activity collection. Use multiple Add calls instaead
foreach (Activity newActivity in activities)
{
rootActivity.Activities.Add(newActivity);
}
foreach (Activity childActivity in activities)
{
WorkflowDesignerLoader.AddActivityToDesigner(designerHost, childActivity);
}
}
}
}
}
}
private static void EnsureDefaultChildHierarchy(IDesignerHost designerHost)
{
CompositeActivity rootComponent = designerHost.RootComponent as CompositeActivity;
if ((rootComponent != null) && (rootComponent.Activities.Count == 0))
{
object[] customAttributes = rootComponent.GetType().GetCustomAttributes(typeof(ToolboxItemAttribute), false);
ToolboxItemAttribute attribute = ((customAttributes != null) && (customAttributes.GetLength(0) > 0)) ? (customAttributes[0] as ToolboxItemAttribute) : null;
if ((attribute != null) && (attribute.ToolboxItemType != null))
{
IComponent[] componentArray = (Activator.CreateInstance(attribute.ToolboxItemType, new object[] { rootComponent.GetType() }) as ToolboxItem).CreateComponents();
CompositeActivity activity2 = null;
foreach (IComponent component in componentArray)
{
if (component.GetType() == rootComponent.GetType())
{
activity2 = component as CompositeActivity;
break;
}
}
if ((activity2 != null) && (activity2.Activities.Count > 0))
{
IIdentifierCreationService service = designerHost.GetService(typeof(IIdentifierCreationService)) as IIdentifierCreationService;
if (service != null)
{
Activity[] childActivities = activity2.Activities.ToArray();
activity2.Activities.Clear();
service.EnsureUniqueIdentifiers(rootComponent, childActivities);
foreach (Activity activity3 in childActivities)
{
rootComponent.Activities.Add(activity3);
}
foreach (Activity activity4 in childActivities)
{
WorkflowDesignerLoader.AddActivityToDesigner(designerHost, activity4);
}
}
}
}
}
}