/// <summary>
/// This command adds our example "tag" attached property on all of the selected elements
/// </summary>
public static void OnTagSelection(ICommandParameter parameter, ICompositionHost host, DocumentEditSite site)
{
var selectedModels = site.ActiveSelection.Select(vm => vm.Model).OfType <Element>();
if (!selectedModels.Any())
{
return;
}
// When setting a tag we are modifying the model so we must set the tags in a transaction. Since all of the models are in
// the same file we can set all of the tags in a single transaction.
using (var transaction = selectedModels.First().TransactionManager.BeginTransaction("Tag Selection", TransactionPurpose.User))
{
foreach (var element in selectedModels)
{
ExampleAttachedProperties.SetTag(element, "Tagged");
}
transaction.Commit();
}
}
/// <summary>
/// This command finds all current model elements that have the example "tag" set and highlights the first element
/// </summary>
public static void OnFindTaggedElements(ICommandParameter parameter, ICompositionHost host, DocumentEditSite site)
{
var rootElement = site.ActiveDocumentEditor?.EditorInfo?.RootElement;
if (rootElement != null)
{
List <Element> taggedElements = new List <Element>();
foreach (var element in rootElement.GetSelfAndDescendantsBreadthFirst((e) => true))
{
if (ExampleAttachedProperties.GetTag(element) == "Tagged")
{
taggedElements.Add(element);
}
}
if (taggedElements.Any())
{
// If we found tagged elements highlight all of them with a slight delay for a fun effect.
// Note the usage of .IgnoreAwait(). This is a convention we use to ensure that any unhandled exceptions
// are dealt with.
SlowlyHighlightElementsAsync(site, taggedElements).IgnoreAwait();
}
}
}