static Type ResolveGenericParameters(DependencyObject dropTarget, EditingContext context, Type type)
{
// look to see if there is a DefaultTypeArgumentAttribute on it
DefaultTypeArgumentAttribute typeArgumentAttribute = ExtensibilityAccessor.GetAttribute <DefaultTypeArgumentAttribute>(type);
if (typeArgumentAttribute != null && typeArgumentAttribute.Type != null)
{
type = type.MakeGenericType(typeArgumentAttribute.Type);
}
else //require user to resolve generic arguments
{
ActivityTypeResolver wnd = new ActivityTypeResolver();
if (null != context)
{
WindowHelperService service = context.Services.GetService <WindowHelperService>();
if (null != service)
{
service.TrySetWindowOwner(dropTarget, wnd);
}
}
TypeResolvingOptions dropTargetOptions = null;
TypeResolvingOptions activityTypeOptions = null;
//try to see if the container has any customization for type resolver
ICompositeView container = dropTarget as ICompositeView;
if (container != null)
{
dropTargetOptions = container.DroppingTypeResolvingOptions;
}
//try to see if the activity type in discourse has any customization for type resolver
TypeResolvingOptionsAttribute attr = WorkflowViewService.GetAttribute <TypeResolvingOptionsAttribute>(type);
if (attr != null)
{
activityTypeOptions = attr.TypeResolvingOptions;
}
//if both have type resolver, try to merge them
TypeResolvingOptions options = TypeResolvingOptions.Merge(dropTargetOptions, activityTypeOptions);
if (options != null)
{
wnd.Options = options;
}
wnd.Context = context;
wnd.EditedType = type;
wnd.Width = 340;
wnd.Height = 200;
type = (true == wnd.ShowDialog() ? wnd.ConcreteType : null);
}
return(type);
}
public TypeResolvingOptionsAttribute(TypeResolvingOptions options)
{
this.TypeResolvingOptions = options;
}
public TypeResolvingOptionsAttribute(TypeResolvingOptions options)
{
this.TypeResolvingOptions = options;
}
