Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / Tools / System.Activities.Presentation / System / Activities / Presentation / Model / GenericArgumentsUpdater.cs / 1305376 / GenericArgumentsUpdater.cs
//---------------------------------------------------------------- // Copyright (c) Microsoft Corporation. All rights reserved. //--------------------------------------------------------------- namespace System.Activities.Presentation.Model { using System; using System.Activities; using System.Diagnostics; using System.Linq; using System.Runtime; using System.Activities.Presentation.View; using System.Windows.Threading; class GenericArgumentUpdater { EditingContext context; const string TypeArgumentPropertyName = "TypeArgument"; public GenericArgumentUpdater(EditingContext context) { this.context = context; } public void AddSupportForUpdatingTypeArgument(Type modelItemType) { AttachedPropertytypeArgumentProperty = new AttachedProperty { Name = TypeArgumentPropertyName, OwnerType = modelItemType, Getter = (modelItem) => GetTypeArgument(modelItem), Setter = (modelItem, value) => UpdateTypeArgument(modelItem, value), IsBrowsable = true }; this.context.Services.GetService ().AddProperty(typeArgumentProperty); } private static void UpdateTypeArgument(ModelItem modelItem, Type value) { Type oldModelItemType = modelItem.ItemType; Fx.Assert(oldModelItemType.GetGenericArguments().Count() == 1, "we only support changing a single type parameter ?"); Type newModelItemType = oldModelItemType.GetGenericTypeDefinition().MakeGenericType(value); Fx.Assert(newModelItemType != null, "New model item type needs to be non null or we cannot proceed further"); ModelItem newModelItem = ModelFactory.CreateItem(modelItem.GetEditingContext(), Activator.CreateInstance(newModelItemType)); MorphHelper.MorphObject(modelItem, newModelItem); MorphHelper.MorphProperties(modelItem, newModelItem); if (oldModelItemType.IsSubclassOf(typeof(Activity)) && newModelItemType.IsSubclassOf(typeof(Activity))) { if (string.Equals((string)modelItem.Properties["DisplayName"].ComputedValue, GetActivityDefaultName(oldModelItemType), StringComparison.Ordinal)) { newModelItem.Properties["DisplayName"].SetValue(GetActivityDefaultName(newModelItemType)); } } DesignerView designerView = modelItem.GetEditingContext().Services.GetService (); if (designerView != null) { Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Render, (Action)(() => { if (designerView.RootDesigner != null && ((WorkflowViewElement)designerView.RootDesigner).ModelItem == modelItem) { designerView.MakeRootDesigner(newModelItem, true); } Selection.SelectOnly(modelItem.GetEditingContext(), newModelItem); })); } } private static Type GetTypeArgument(ModelItem modelItem) { Fx.Assert(modelItem.ItemType.GetGenericArguments().Count() == 1, "we only support changing a single type parameter ?"); return modelItem.ItemType.GetGenericArguments()[0]; } private static string GetActivityDefaultName(Type activityType) { Fx.Assert(activityType.IsSubclassOf(typeof(Activity)), "activityType is not a subclass of System.Activities.Activity"); Activity activity = (Activity)Activator.CreateInstance(activityType); return activity.DisplayName; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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