public static void OnAddAnnotationCommandExecuted(ExecutedRoutedEventArgs e, ModelItem modelItem)
{
ModelProperty property = modelItem.Properties.Find(Annotation.AnnotationTextPropertyName);
if (property != null)
{
using (ModelEditingScope editingScope = modelItem.BeginEdit(SR.AddAnnotationDescription))
{
property.SetValue(string.Empty);
ViewStateService viewStateService = modelItem.GetEditingContext().Services.GetService <ViewStateService>();
viewStateService.StoreViewStateWithUndo(modelItem, Annotation.IsAnnotationDockedViewStateName, false);
editingScope.Complete();
}
if (modelItem.View != null)
{
WorkflowViewElement element = modelItem.View as WorkflowViewElement;
if (element != null)
{
element.OnEditAnnotation();
}
}
}
e.Handled = true;
}
//Calculates whether ShowExpanded for a given WorklfowViewElement should be true or false.
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
ModelItem modelItem = (ModelItem)values[0];
bool isRootDesigner = (bool)values[1];
bool shouldExpandAll = (bool)values[2];
bool shouldCollapseAll = (bool)values[3];
bool expandState = (bool)values[4];
bool pinState = (bool)values[5];
WorkflowViewElement viewElement = (WorkflowViewElement)values[6];
//Pinstate should be false in following cases (Designer should be unpinned in following cases):
//1. ExpandAll is not enabled.
//2. ExpandAll is enabled and ExpandState is true.
//Similarly for Collapse All.
if ((!shouldExpandAll || expandState) &&
(!shouldCollapseAll || !expandState))
{
viewElement.PinState = false;
}
if (viewElement.IsAncestorOfRootDesigner)
{
return(true);
}
return(ViewUtilities.ShouldShowExpanded(isRootDesigner, viewElement.DoesParentAlwaysExpandChild(),
viewElement.DoesParentAlwaysCollapseChildren(), expandState, shouldExpandAll, shouldCollapseAll, viewElement.PinState));
}
protected override void OnDrop(DragEventArgs e)
{
int index = addAtEndMarker;
WorkflowViewElement dropTarget = null;
if (e.OriginalSource is WorkflowViewElement)
{
dropTarget = (WorkflowViewElement)e.OriginalSource;
}
else
{
dropTarget = VisualTreeUtils.FindFocusableParent <WorkflowViewElement>((UIElement)e.OriginalSource);
}
if (null != dropTarget && null != dropTarget.ModelItem)
{
int targetIndex = this.Items.IndexOf(dropTarget.ModelItem);
if (-1 != targetIndex)
{
index = targetIndex + 1;
}
}
OnItemsDropped(e, index);
base.OnDrop(e);
}
internal static DataObject DoDragMoveImpl(IEnumerable <WorkflowViewElement> draggedViewElements, Point referencePoint)
{
List <ModelItem> draggedModelItems = new List <ModelItem>();
bool first = true;
WorkflowViewElement viewElement = null;
foreach (WorkflowViewElement view in draggedViewElements)
{
if (view != null)
{
if (first)
{
viewElement = view;
first = false;
}
draggedModelItems.Add(view.ModelItem);
view.IsHitTestVisible = false;
}
}
DataObject dataObject = new DataObject(ModelItemsDataFormat, draggedModelItems);
// For compatiblity
if (viewElement != null)
{
dataObject.SetData(ModelItemDataFormat, viewElement.ModelItem);
dataObject.SetData(CompositeViewFormat, GetCompositeView(viewElement));
}
dataObject.SetData(DragAnchorPointFormat, referencePoint);
if (viewElement != null)
{
DesignerView designerView = viewElement.Context.Services.GetService <DesignerView>();
ViewElementDragShadow dragShadow = new ViewElementDragShadow(designerView.scrollableContent, draggedViewElements, referencePoint, designerView.ZoomFactor);
designerView.BeginDragShadowTracking(dragShadow);
//whenever drag drop fails - ensure getting rid of drag shadow
try
{
DragDrop.DoDragDrop(designerView, dataObject, DragDropEffects.Move | DragDropEffects.Copy | DragDropEffects.Scroll | DragDropEffects.Link);
}
catch
{
//let the caller handle exception
throw;
}
finally
{
designerView.EndDragShadowTracking(dragShadow);
foreach (WorkflowViewElement view in draggedViewElements)
{
if (view != null)
{
view.IsHitTestVisible = true;
}
}
}
}
return(dataObject);
}
public static UIElement GetCompositeView(WorkflowViewElement workflowViewElement)
{
if (workflowViewElement == null)
{
throw FxTrace.Exception.ArgumentNull("workflowViewElement");
}
return((UIElement)workflowViewElement.GetValue(DragDropHelper.DragSourceProperty));
}
//This enables us to get children ICompositeViews from WorkflowViewElements.
//Eg. get the WorkflowItemsPresenter from SequenceDesigner.
//This is useful for Cut-Copy-Paste, Delete handling, etc.
internal static void RegisterWithParentViewElement(ICompositeView container)
{
WorkflowViewElement parent = GetParentViewElement(container);
if (parent != null)
{
CutCopyPasteHelper.AddChildContainer(parent, container);
}
}
public static void Delete(EditingContext context)
{
if (context == null)
{
throw FxTrace.Exception.AsError(new ArgumentNullException("context"));
}
Selection selection = context.Items.GetValue <Selection>();
if (null != selection)
{
bool selectRoot = false;
DesignerView designerView = context.Services.GetService <DesignerView>();
var toDelete = selection.SelectedObjects.Where(p => null != p.View && p.View is WorkflowViewElement && !p.View.Equals(designerView.RootDesigner));
if (toDelete.Count() > 0)
{
using (EditingScope es = (EditingScope)toDelete.FirstOrDefault().BeginEdit(SR.DeleteOperationEditingScopeDescription))
{
Dictionary <ICompositeView, List <ModelItem> > containerToModelItemsDict = new Dictionary <ICompositeView, List <ModelItem> >();
List <ModelItem> modelItemsPerContainer;
foreach (var item in toDelete)
{
ICompositeView container = (ICompositeView)DragDropHelper.GetCompositeView((WorkflowViewElement)item.View);
if (null != container)
{
if (!containerToModelItemsDict.TryGetValue(container, out modelItemsPerContainer))
{
modelItemsPerContainer = new List <ModelItem>();
containerToModelItemsDict.Add(container, modelItemsPerContainer);
}
modelItemsPerContainer.Add(item);
}
}
foreach (ICompositeView container in containerToModelItemsDict.Keys)
{
container.OnItemsDelete(containerToModelItemsDict[container]);
selectRoot = true;
}
if (selectRoot)
{
DesignerView view = context.Services.GetService <DesignerView>();
if (null != view)
{
WorkflowViewElement rootView = view.RootDesigner as WorkflowViewElement;
if (rootView != null)
{
Selection.SelectOnly(context, rootView.ModelItem);
}
}
}
es.Complete();
}
}
}
}
static ICompositeView GetContainerForPaste(ModelItem pasteModelItem, Point clickPoint)
{
ICompositeView pasteContainer = null;
if (null != pasteModelItem && null != pasteModelItem.View && pasteModelItem.View is WorkflowViewElement)
{
pasteContainer = ((WorkflowViewElement)pasteModelItem.View).ActiveCompositeView;
}
if (null == pasteContainer)
{
//Get clicked container.
if (clickPoint.X > 0 && clickPoint.Y > 0)
{
pasteContainer = GetClickedContainer(pasteModelItem, clickPoint);
}
//If the container itself is a WVE, there's posibility that it's collapsed.
//Thus, we need to check this as well.
if (pasteContainer != null && pasteContainer is WorkflowViewElement)
{
WorkflowViewElement view = pasteContainer as WorkflowViewElement;
if (!view.ShowExpanded)
{
pasteContainer = null;
}
}
else if (pasteContainer == null) //If the modelitem.View itself is a container.
{
WorkflowViewElement view = pasteModelItem.View as WorkflowViewElement;
if (view != null && view.ShowExpanded)
{
pasteContainer = pasteModelItem.View as ICompositeView;
}
}
//Get the container registered with modelItem.View if unambigous
//If nothing works take the container with keyboard focus if one exists.
if (pasteContainer == null)
{
HashSet <ICompositeView> childrenContainers = CutCopyPasteHelper.GetChildContainers(pasteModelItem.View as WorkflowViewElement);
if ((childrenContainers == null || childrenContainers.Count == 0) && null != pasteModelItem.View)
{
pasteContainer = (ICompositeView)DragDropHelper.GetCompositeView((WorkflowViewElement)pasteModelItem.View);
}
else if (null != childrenContainers && childrenContainers.Count == 1)
{
pasteContainer = new List <ICompositeView>(childrenContainers)[0];
}
else
{
pasteContainer = Keyboard.FocusedElement as ICompositeView;
}
}
}
return(pasteContainer);
}
static HashSet <ICompositeView> GetChildContainers(WorkflowViewElement workflowViewElement)
{
HashSet <ICompositeView> childContainers = null;
if (workflowViewElement != null && workflowViewElement.ShowExpanded)
{
childContainers = (HashSet <ICompositeView>)workflowViewElement.GetValue(CutCopyPasteHelper.ChildContainersProperty);
}
return(childContainers);
}
public static void OnEditAnnotationCommandExecuted(ExecutedRoutedEventArgs e, ModelItem modelItem)
{
WorkflowViewElement element = modelItem.View as WorkflowViewElement;
if (element != null)
{
element.OnEditAnnotation();
}
e.Handled = true;
}
public static void SetCompositeView(WorkflowViewElement workflowViewElement, UIElement dragSource)
{
if (workflowViewElement == null)
{
throw FxTrace.Exception.ArgumentNull("workflowViewElement");
}
if (dragSource == null)
{
throw FxTrace.Exception.ArgumentNull("dragSource");
}
workflowViewElement.SetValue(DragDropHelper.DragSourceProperty, dragSource);
}
public static Visibility GetExpandCollapseButtonVisibility(WorkflowViewElement viewElement)
{
ActivityDesigner designer = viewElement as ActivityDesigner;
bool hasDelegates = (designer != null) && designer.HasActivityDelegates;
Visibility visibility = Visibility.Visible;
if (viewElement == null || viewElement.IsRootDesigner || viewElement.DoesParentAlwaysExpandChild() ||
viewElement.DoesParentAlwaysCollapseChildren() || (viewElement.Content == null && !hasDelegates) ||
!viewElement.Collapsible || !(viewElement is ActivityDesigner))
{
visibility = Visibility.Collapsed;
}
return visibility;
}
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
bool isRootDesigner = true;
if (values[0] is bool)
{
isRootDesigner = (bool)values[0];
}
ModelItem modelItem = values[1] as ModelItem;
WorkflowViewElement viewElement = values[2] as WorkflowViewElement;
Fx.Assert(viewElement != null, "TemplatedParent should be of type WorkflowViewElement");
return(GetExpandCollapseButtonVisibility(viewElement));
}
public static Visibility GetExpandCollapseButtonVisibility(WorkflowViewElement viewElement)
{
ActivityDesigner designer = viewElement as ActivityDesigner;
bool hasDelegates = (designer != null) && designer.HasActivityDelegates;
Visibility visibility = Visibility.Visible;
if (viewElement == null || viewElement.IsRootDesigner || viewElement.DoesParentAlwaysExpandChild() ||
viewElement.DoesParentAlwaysCollapseChildren() || (viewElement.Content == null && !hasDelegates) ||
!viewElement.Collapsible || !(viewElement is ActivityDesigner))
{
visibility = Visibility.Collapsed;
}
return(visibility);
}
private List <WorkflowViewElement> ObjectList2WorkflowViewElementList(IEnumerable <object> droppedObjects)
{
List <WorkflowViewElement> movedViewElements = new List <WorkflowViewElement>();
foreach (object droppedObject in droppedObjects)
{
if (droppedObject is ModelItem && ((ModelItem)droppedObject).View != null)
{
WorkflowViewElement view = (WorkflowViewElement)((ModelItem)droppedObject).View;
WorkflowItemPresenter container = DragDropHelper.GetCompositeView(view) as WorkflowItemPresenter;
if (container != this)
{
movedViewElements.Add(view);
}
}
}
return(movedViewElements);
}
//This is more efficient than walking up the VisualTree looking for WorkflowViewElements.
//Assuming that Cut-Copy will always be against selected elements.
//This implies that only elements under the BreadCrumbRoot can be cut/copied.
static List <WorkflowViewElement> GetSelectableParentViewElements(WorkflowViewElement childElement)
{
List <WorkflowViewElement> parentViewElements = new List <WorkflowViewElement>();
if (childElement != null)
{
UIElement breadcrumbRoot = childElement.Context.Services.GetService <DesignerView>().RootDesigner;
ICompositeView container = (ICompositeView)DragDropHelper.GetCompositeView(childElement);
while (!childElement.Equals(breadcrumbRoot) && container != null)
{
childElement = CutCopyPasteHelper.GetParentViewElement(container);
Fx.Assert(childElement != null, "container should be present in a WorkflowViewElement");
parentViewElements.Add(childElement);
container = (ICompositeView)DragDropHelper.GetCompositeView(childElement);
}
}
return(parentViewElements);
}
public static DragDropEffects DoDragMove(WorkflowViewElement draggedViewElement, Point referencePoint)
{
if (draggedViewElement == null)
{
throw FxTrace.Exception.ArgumentNull("draggedViewElement");
}
if (referencePoint == null)
{
throw FxTrace.Exception.ArgumentNull("referencePoint");
}
ModelItem draggedActivityModelItem = draggedViewElement.ModelItem;
DataObject dataObject = new DataObject(ModelItemDataFormat, draggedActivityModelItem);
dataObject.SetData(CompositeViewFormat, GetCompositeView(draggedViewElement));
dataObject.SetData(DragAnchorPointFormat, referencePoint);
List <ModelItem> draggedModelItems = new List <ModelItem>();
draggedModelItems.Add(draggedActivityModelItem);
dataObject.SetData(ModelItemsDataFormat, draggedModelItems);
DesignerView view = draggedViewElement.Context.Services.GetService <DesignerView>();
ViewElementDragShadow dragShadow = new ViewElementDragShadow(view.scrollableContent, draggedViewElement, referencePoint, view.ZoomFactor);
draggedViewElement.IsHitTestVisible = false;
view.BeginDragShadowTracking(dragShadow);
//whenever drag drop fails - ensure getting rid of drag shadow
try
{
DragDrop.DoDragDrop(GetCompositeView(draggedViewElement), dataObject, DragDropEffects.Move | DragDropEffects.Copy | DragDropEffects.Scroll | DragDropEffects.Link);
}
catch
{
//let the caller handle exception
throw;
}
finally
{
view.EndDragShadowTracking(dragShadow);
draggedViewElement.IsHitTestVisible = true;
}
return(GetDragDropCompletedEffects(dataObject));
}
public ViewElementDragShadow(UIElement owner, WorkflowViewElement viewElement, Point offset, double scaleFactor)
: base(owner)
{
Rect bounds = VisualTreeHelper.GetDescendantBounds(viewElement);
this.width = bounds.Width;
this.height = bounds.Height;
this.content = new Rectangle()
{
Width = this.width,
Height = this.height,
Fill = new VisualBrush(viewElement)
{
Opacity = 0.6
}
};
this.InitializeCommon(offset, scaleFactor);
}
static void AddChildContainer(WorkflowViewElement viewElement, ICompositeView sourceContainer)
{
if (viewElement == null)
{
throw FxTrace.Exception.AsError(new ArgumentNullException("viewElement"));
}
if (sourceContainer == null)
{
throw FxTrace.Exception.AsError(new ArgumentNullException("sourceContainer"));
}
HashSet<ICompositeView> containers = (HashSet<ICompositeView>)viewElement.GetValue(CutCopyPasteHelper.ChildContainersProperty);
if (containers == null)
{
containers = new HashSet<ICompositeView>();
viewElement.SetValue(CutCopyPasteHelper.ChildContainersProperty, containers);
}
containers.Add(sourceContainer);
}
static void AddChildContainer(WorkflowViewElement viewElement, ICompositeView sourceContainer)
{
if (viewElement == null)
{
throw FxTrace.Exception.AsError(new ArgumentNullException("viewElement"));
}
if (sourceContainer == null)
{
throw FxTrace.Exception.AsError(new ArgumentNullException("sourceContainer"));
}
HashSet <ICompositeView> containers = (HashSet <ICompositeView>)viewElement.GetValue(CutCopyPasteHelper.ChildContainersProperty);
if (containers == null)
{
containers = new HashSet <ICompositeView>();
viewElement.SetValue(CutCopyPasteHelper.ChildContainersProperty, containers);
}
containers.Add(sourceContainer);
}
private bool IsInParentChain(ModelItem droppedModelItem)
{
bool isInParentChain = false;
// start with immediate workflowviewElement outside this.
WorkflowViewElement parentViewElement = GetParentWorkflowViewElement();
if (parentViewElement != null)
{
ModelItem parentModelItem = parentViewElement.ModelItem;
while (parentModelItem != null)
{
if (parentModelItem == droppedModelItem)
{
isInParentChain = true;
break;
}
parentModelItem = parentModelItem.Parent;
}
}
return(isInParentChain);
}
internal static void DoPaste(EditingContext context, Point pastePoint, WorkflowViewElement pastePointReference)
{
if (context == null)
{
throw FxTrace.Exception.AsError(new ArgumentNullException("context"));
}
ModelItem modelItem = context.Items.GetValue <Selection>().PrimarySelection;
if (modelItem == null)
{
return;
}
//Get data from clipboard.
List <object> metaData = null;
List <object> clipboardObjects = GetFromClipboard(out metaData, context);
if (clipboardObjects != null)
{
using (EditingScope es = (EditingScope)modelItem.BeginEdit(SR.PasteUndoDescription))
{
if (clipboardObjects.Count == 3 && clipboardObjects[1] is Func <ModelItem, object, object> )
{
var factoryMethod = (Func <ModelItem, object, object>)clipboardObjects[1];
object result = factoryMethod(modelItem, clipboardObjects[2]);
clipboardObjects = new List <object>();
clipboardObjects.Add(result);
}
ICompositeView container = GetContainerForPaste(modelItem, pastePoint);
if (container != null)
{
container.OnItemsPasted(clipboardObjects, metaData, pastePoint, pastePointReference);
}
es.Complete();
}
}
}
private WorkflowViewElement GetParentWorkflowViewElement()
{
// Walk the logic tree first.
FrameworkElement parent = (FrameworkElement)this.Parent;
while (parent != null && !(parent is WorkflowViewElement))
{
parent = parent.Parent as FrameworkElement;
}
WorkflowViewElement result = parent as WorkflowViewElement;
// If not found, walk the visual tree.
if (null == result)
{
parent = VisualTreeHelper.GetParent(this) as FrameworkElement;
while (parent != null && !(parent is WorkflowViewElement))
{
parent = VisualTreeHelper.GetParent(parent) as FrameworkElement;
}
result = parent as WorkflowViewElement;
}
return(result);
}
internal static void DoCut(List <ModelItem> modelItemsToCut, EditingContext context)
{
if (modelItemsToCut == null)
{
throw FxTrace.Exception.AsError(new ArgumentNullException("modelItemsToCut"));
}
if (context == null)
{
throw FxTrace.Exception.AsError(new ArgumentNullException("context"));
}
modelItemsToCut.RemoveAll((modelItem) => { return(modelItem == null); });
if (modelItemsToCut.Count > 0)
{
using (EditingScope es = (EditingScope)modelItemsToCut[0].BeginEdit(SR.CutOperationEditingScopeDescription))
{
try
{
CutCopyOperation(modelItemsToCut, context, true);
}
catch (ExternalException e)
{
es.Revert();
ErrorReporting.ShowErrorMessage(e.Message);
return;
}
DesignerView view = context.Services.GetService <DesignerView>();
//Setting the selection to Breadcrumb root.
Fx.Assert(view != null, "DesignerView Cannot be null during cut");
WorkflowViewElement rootView = view.RootDesigner as WorkflowViewElement;
if (rootView != null)
{
Selection.SelectOnly(context, rootView.ModelItem);
}
es.Complete();
}
}
}
static void OnReadOnlyChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
WorkflowViewElement viewElement = obj as WorkflowViewElement;
viewElement.OnReadOnlyChanged((bool)e.NewValue);
}
static void OnContextChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
WorkflowViewElement viewElement = obj as WorkflowViewElement;
viewElement.OnContextChanged();
}
public WorkflowViewElementAutomationPeer(WorkflowViewElement owner)
: base(owner)
{
this.owner = owner;
}
public void OnItemsPasted(List<object> itemsToPaste, List<object> metaData, Point pastePoint, WorkflowViewElement pastePointReference)
{
if (this.ModelItem.ItemType == typeof(State))
{
WorkflowViewElement view = VisualTreeUtils.FindVisualAncestor<WorkflowViewElement>(this);
if (view != null)
{
StateContainerEditor container = (StateContainerEditor)DragDropHelper.GetCompositeView(view);
container.OnItemsPasted(itemsToPaste, metaData, pastePoint, pastePointReference);
}
return;
}
if (itemsToPaste.Count == 1 && itemsToPaste.First() is Transition)
{
if (metaData == null || metaData.Count != 1 || !(metaData.First() is string))
{
ShowMessageBox(SR.PasteTransitionWithoutDestinationState);
return;
}
ModelItem destinationState = FindState(metaData.First() as string);
if (destinationState == null)
{
ShowMessageBox(SR.PasteTransitionWithoutDestinationState);
return;
}
this.PopulateVirtualizingContainer(destinationState);
ModelItem[] selectedItems = this.Context.Items.GetValue<Selection>().SelectedObjects.ToArray();
string errorMessage;
if (!CanPasteTransition(destinationState, out errorMessage, selectedItems))
{
ShowMessageBox(errorMessage);
return;
}
Transition pastedTransition = itemsToPaste.First() as Transition;
Fx.Assert(pastedTransition != null, "Copied Transition should not be null.");
using (EditingScope es = (EditingScope)this.ModelItem.BeginEdit(System.Activities.Presentation.SR.PropertyChangeEditingScopeDescription))
{
string displayName = pastedTransition.DisplayName;
bool isFirst = true;
foreach (ModelItem selectedItem in selectedItems)
{
if (!isFirst)
{
StringReader reader = new StringReader(XamlServices.Save(pastedTransition));
pastedTransition = (Transition)XamlServices.Load(reader);
}
ModelItem transitionModelItem = this.Context.Services.GetRequiredService<ModelTreeManager>().WrapAsModelItem(pastedTransition);
ModelItem sourceState = selectedItem;
sourceState.Properties[StateDesigner.TransitionsPropertyName].Collection.Add(transitionModelItem);
transitionModelItem.Properties[TransitionDesigner.ToPropertyName].SetValue(destinationState);
if (isFirst)
{
this.ViewStateService.RemoveViewState(transitionModelItem, ConnectorLocationViewStateKey);
this.ViewStateService.RemoveViewState(transitionModelItem, SrcConnectionPointIndexStateKey);
this.ViewStateService.RemoveViewState(transitionModelItem, DestConnectionPointIndexStateKey);
isFirst = false;
}
}
es.Complete();
}
}
else
{
List<ModelItem> modelItemsPasted = new List<ModelItem>();
List<State> states = new List<State>();
foreach (object obj in itemsToPaste)
{
State state;
if (obj is FinalState)
{
state = new State() { DisplayName = DefaultFinalStateDisplayName, IsFinal = true };
}
else
{
state = (State)obj;
if (state.DisplayName == null)
{
state.DisplayName = DefaultStateDisplayName;
}
}
states.Add(state);
}
RemoveDanglingTransitions(states);
using (EditingScope es = (EditingScope)this.ModelItem.BeginEdit(
System.Activities.Presentation.SR.CollectionAddEditingScopeDescription))
{
// Fix 157591 by storing the height and width of the container "before" the new states are added to the
// panel, and group the insertion inside one editing scope - such that Undo will also restore the
// size of the StateMachineContainer to pre-insert size.
StoreShapeSizeWithUndoRecursively(this.ModelItem);
foreach (State state in states)
{
ModelItem stateModelItem =
(this.ModelItem.ItemType == typeof(StateMachine)) ?
this.ModelItem.Properties[StateMachineDesigner.StatesPropertyName].Collection.Add(state) :
GetStateMachineModelItem(this.ModelItem).Properties[StateMachineDesigner.StatesPropertyName].Collection.Add(state);
modelItemsPasted.Add(stateModelItem);
}
es.Complete();
}
if (modelItemsPasted.Count > 0)
{
// translate location view states to be in the coordinate system of the pasting target
Fx.Assert(this.ModelItem.ItemType == typeof(StateMachine), "Only StateMachine contain the StateContainerEditor.");
this.UpdateLocationViewStatesByMetaData(modelItemsPasted, metaData, this);
if (pastePoint.X > 0 && pastePoint.Y > 0)
{
if (pastePointReference != null)
{
pastePoint = pastePointReference.TranslatePoint(pastePoint, this.panel);
pastePoint.X = pastePoint.X < 0 ? 0 : pastePoint.X;
pastePoint.Y = pastePoint.Y < 0 ? 0 : pastePoint.Y;
}
this.UpdateLocationViewStatesByPoint(modelItemsPasted, pastePoint);
}
// If paste point is not available, paste the items to the top left corner.
else
{
this.UpdateLocationViewStatesToAvoidOverlap(modelItemsPasted);
}
}
this.Dispatcher.BeginInvoke(() =>
{
if (modelItemsPasted.Count > 0 && modelItemsPasted[0] != null)
{
Keyboard.Focus(modelItemsPasted[0].View as IInputElement);
}
this.Context.Items.SetValue(new Selection(modelItemsPasted));
},
DispatcherPriority.ApplicationIdle
);
}
}
public void OnItemsPasted(List<object> itemsToPaste, List<object> metaData, Point pastePoint, WorkflowViewElement pastePointReference)
{
Fx.Assert(this.panel != null, "This code shouldn't be hit if panel is null");
HashSet<Activity> workflowElementsPasted = new HashSet<Activity>();
List<ModelItem> modelItemsToSelect = new List<ModelItem>();
bool shouldStoreCurrentSizeViewState = true;
Fx.Assert(this.ModelItem is IModelTreeItem, "this.ModelItem must implement IModelTreeItem");
using (EditingScope editingScope = ((IModelTreeItem)this.ModelItem).ModelTreeManager.CreateEditingScope(System.Activities.Presentation.SR.CollectionAddEditingScopeDescription))
{
if (metaData != null)
{
List<ModelItem> modelItemsPerMetaData = new List<ModelItem>();
foreach (object designerMetaData in metaData)
{
if (designerMetaData is List<FlowNode>)
{
//This is flowchart metadata.
foreach (FlowNode element in designerMetaData as List<FlowNode>)
{
FlowStep step = element as FlowStep;
if (step != null)
{
workflowElementsPasted.Add(step.Action);
}
if (shouldStoreCurrentSizeViewState)
{
// Pasting may change the size of flowchart; need this to undo the size change.
this.StoreCurrentSizeViewStateWithUndo();
shouldStoreCurrentSizeViewState = false;
}
ModelItem item = this.ModelItem.Properties["Nodes"].Collection.Add(element);
// if the pasted item is a flowswitch but the default target is not in the pasted selection,
// reset the DefaultCaseDisplayName to "Default".
if (GenericFlowSwitchHelper.IsGenericFlowSwitch(item.ItemType) &&
item.Properties["Default"].Value == null)
{
item.Properties[FlowSwitchLabelFeature.DefaultCaseDisplayNamePropertyName].SetValue(FlowSwitchLabelFeature.DefaultCaseDisplayNameDefaultValue);
}
modelItemsPerMetaData.Add(item);
if (item != null)
{
if (item.ItemType.Equals(typeof(FlowStep)))
{
modelItemsToSelect.Add(item.Properties["Action"].Value);
}
else
{
modelItemsToSelect.Add(item);
}
}
}
if (pastePoint.X > 0 && pastePoint.Y > 0)
{
Point panelPoint = this.TranslatePoint(pastePoint, this.panel);
if (pastePointReference != null && !pastePointReference.Equals(this))
{
if (pastePointReference.ModelItem != null && this.modelElement.ContainsKey(pastePointReference.ModelItem))
{
panelPoint = pastePointReference.TranslatePoint(pastePoint, this.panel);
}
}
panelPoint.X = panelPoint.X < 0 ? 0 : panelPoint.X;
panelPoint.Y = panelPoint.Y < 0 ? 0 : panelPoint.Y;
UpdateViewStateOnPastePoint(modelItemsPerMetaData, panelPoint);
}
else
{
UpdateViewStateToAvoidOverlapOnPaste(modelItemsPerMetaData);
}
modelItemsPerMetaData.Clear();
}
}
}
foreach (object itemToPaste in itemsToPaste)
{
Activity workflowElementToPaste = itemToPaste as Activity;
if (workflowElementToPaste != null && !workflowElementsPasted.Contains(workflowElementToPaste))
{
FlowStep flowStep = new FlowStep { Action = workflowElementToPaste, Next = null };
if (shouldStoreCurrentSizeViewState)
{
// Pasting may change the size of flowchart; need this to undo the size change.
this.StoreCurrentSizeViewStateWithUndo();
shouldStoreCurrentSizeViewState = false;
}
// When paste a non-flowstep object to flowchart, the existing hintsize of the object
// should be removed, and let flowchart panel to compute the right size.
VirtualizedContainerService.SetHintSize(workflowElementToPaste, null);
ModelItem flowStepItem = this.ModelItem.Properties["Nodes"].Collection.Add(flowStep);
if (flowStepItem != null)
{
modelItemsToSelect.Add(flowStepItem.Properties["Action"].Value);
}
}
}
editingScope.Complete();
}
this.Dispatcher.BeginInvoke(() =>
{
if (modelItemsToSelect.Count > 0 && modelItemsToSelect[0] != null)
{
Keyboard.Focus(modelItemsToSelect[0].View as IInputElement);
}
this.Context.Items.SetValue(new Selection(modelItemsToSelect));
},
DispatcherPriority.ApplicationIdle
);
}
//This is more efficient than walking up the VisualTree looking for WorkflowViewElements.
//Assuming that Cut-Copy will always be against selected elements.
//This implies that only elements under the BreadCrumbRoot can be cut/copied.
static List<WorkflowViewElement> GetSelectableParentViewElements(WorkflowViewElement childElement)
{
List<WorkflowViewElement> parentViewElements = new List<WorkflowViewElement>();
if (childElement != null)
{
UIElement breadcrumbRoot = childElement.Context.Services.GetService<DesignerView>().RootDesigner;
ICompositeView container = (ICompositeView)DragDropHelper.GetCompositeView(childElement);
while (!childElement.Equals(breadcrumbRoot) && container != null)
{
childElement = CutCopyPasteHelper.GetParentViewElement(container);
Fx.Assert(childElement != null, "container should be present in a WorkflowViewElement");
parentViewElements.Add(childElement);
container = (ICompositeView)DragDropHelper.GetCompositeView(childElement);
}
}
return parentViewElements;
}
void StartDragging()
{
try
{
using (ModelEditingScope editingScope = this.ModelItem.BeginEdit(SR.MoveEditingScopeDescription, true))
{
HashSet <WorkflowViewElement> draggedViews = new HashSet <WorkflowViewElement>();
Dictionary <ModelItem, ICompositeView> sourceContainers = new Dictionary <ModelItem, ICompositeView>();
HashSet <ICompositeView> compViewSet = new HashSet <ICompositeView>();
Selection selection = this.Context.Items.GetValue <Selection>();
IEnumerable <ModelItem> selectedObjects = selection.SelectedObjects;
IEnumerable <ModelItem> modelItemsToDrag = DragDropHelper.GetModelItemsToDrag(selectedObjects);
// Save the source containers for the dragged items
foreach (ModelItem modelItem in modelItemsToDrag)
{
WorkflowViewElement view = (WorkflowViewElement)modelItem.View;
draggedViews.Add(view);
ICompositeView container = DragDropHelper.GetCompositeView(view) as ICompositeView;
sourceContainers.Add(modelItem, container);
// If Add returns true => the container is added the first time, which is always ok
// If Add returns false => the container is added more than once
// it must be a IMultipleDragEnabledCompositeView, otherwise, return, because
// we don't support dragging from ICompositeView.
if (!compViewSet.Add(container) && !(container is IMultipleDragEnabledCompositeView))
{
return;
}
}
// Calculate the anchor point for the dragged items
Point relativeLocation = GetRelativeLocation(draggedViews);
Point referencePoint = this.lastMouseDownPoint;
referencePoint.Offset(relativeLocation.X, relativeLocation.Y);
DataObject dataObject = DragDropHelper.DoDragMoveImpl(draggedViews, referencePoint);
IEnumerable <WorkflowViewElement> movedViewElements = DragDropHelper.GetDragDropMovedViewElements(dataObject);
// once drag drop is done make sure the CompositeView is notified of the change in data
if (movedViewElements != null)
{
Dictionary <ICompositeView, List <ModelItem> > containerMovedModelItemList = new Dictionary <ICompositeView, List <ModelItem> >();
// Create containerMovedModelItemList
foreach (WorkflowViewElement view in movedViewElements)
{
ICompositeView compView = DragDropHelper.GetCompositeView(view) as ICompositeView;
Fx.Assert(compView != null, "not an ICompositeView");
if (!containerMovedModelItemList.ContainsKey(compView))
{
containerMovedModelItemList.Add(compView, new List <ModelItem>());
}
containerMovedModelItemList[compView].Add(view.ModelItem);
}
// Call OnItemsMoved to notify the source container.
foreach (KeyValuePair <ICompositeView, List <ModelItem> > pair in containerMovedModelItemList)
{
if (pair.Key is IMultipleDragEnabledCompositeView)
{
((IMultipleDragEnabledCompositeView)pair.Key).OnItemsMoved(pair.Value);
}
else
{
if (pair.Value.Count >= 2)
{
throw FxTrace.Exception.AsError(
new InvalidOperationException(SR.Error_MovingMoreThanOneItemsFromICompositeView));
}
pair.Key.OnItemMoved(pair.Value[0]);
}
}
// animation
foreach (WorkflowViewElement view in movedViewElements)
{
BeginDropAnimation(view);
}
}
// the drop target is using old DragDropHelper API and did not set the moved view elements
else
{
DragDropEffects executedDragDropEffect = DragDropHelper.GetDragDropCompletedEffects(dataObject);
if (executedDragDropEffect == DragDropEffects.Move)
{
if (modelItemsToDrag.Count() == 1)
{
ModelItem movedItem = modelItemsToDrag.First <ModelItem>();
sourceContainers[movedItem].OnItemMoved(movedItem);
BeginDropAnimation((WorkflowViewElement)movedItem.View);
}
else
{
throw FxTrace.Exception.AsError(new InvalidOperationException(SR.DraggingMulitpleItemsError));
}
}
}
editingScope.Complete();
bool dropHappened = movedViewElements != null ||
DragDropHelper.GetDragDropCompletedEffects(dataObject) == DragDropEffects.Move;
if (dropHappened)
{
// add the selected objects back into selection.
this.Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle, (Action)(() =>
{
foreach (ModelItem item in selectedObjects)
{
// We need only the first one
IInputElement viewToFocus = item == null ? null : item.View as IInputElement;
if (viewToFocus != null)
{
Keyboard.Focus(viewToFocus);
break;
}
}
this.Context.Items.SetValue(new Selection(selectedObjects));
}));
}
}
}
catch (Exception e)
{
ErrorReporting.ShowErrorMessage(e.Message);
}
}
void OnItemsDropped(DragEventArgs e, int index)
{
ModelItemHelper.TryCreateImmediateEditingScopeAndExecute(this.Items.GetEditingContext(), System.Activities.Presentation.SR.CollectionAddEditingScopeDescription, (es) =>
{
DragDropHelper.SetDragDropCompletedEffects(e, DragDropEffects.None);
List <object> droppedObjects = new List <object>(DragDropHelper.GetDroppedObjects(this, e, Context));
List <WorkflowViewElement> movedViewElements = new List <WorkflowViewElement>();
List <object> externalMoveList = new List <object>();
List <ModelItem> internalMoveList = new List <ModelItem>();
// Step 1: Sort the list
List <object> sortedDroppingList = DragDropHelper.SortSelectedObjects(droppedObjects);
// Step 2: Categorize dropped objects by their source container.
foreach (object droppedObject in sortedDroppingList)
{
ModelItem modelItem = droppedObject as ModelItem;
WorkflowViewElement view = (modelItem == null) ? null : (modelItem.View as WorkflowViewElement);
if (view == null)
{
externalMoveList.Add(droppedObject);
continue;
}
UIElement container = DragDropHelper.GetCompositeView(view);
if (container == this)
{
internalMoveList.Add(modelItem);
continue;
}
movedViewElements.Add(view);
externalMoveList.Add(droppedObject);
}
// Step 3: Internal movement
if (this.ShouldMoveItems(internalMoveList, index))
{
foreach (ModelItem modelItem in internalMoveList)
{
int oldIndex = this.Items.IndexOf(modelItem);
this.Items.Remove(modelItem);
//if element is placed ahead of old location, decrement the index not to include moved object
if (oldIndex < index)
{
this.InsertItem(index - 1, modelItem);
}
else
{
this.InsertItem(index, modelItem);
index++;
}
}
}
// Step 4: External move and drop from toolbox
foreach (object droppedObject in externalMoveList)
{
if (!this.IsDropAllowed(droppedObject))
{
continue;
}
this.InsertItem(index++, droppedObject);
DragDropHelper.SetDragDropCompletedEffects(e, DragDropEffects.Move);
}
DragDropHelper.SetDragDropMovedViewElements(e, movedViewElements);
e.Handled = true;
if (es != null)
{
es.Complete();
}
});
}
void ICompositeView.OnItemsPasted(List<object> itemsToPaste, List<object> metaData, Point pastePoint, WorkflowViewElement pastePointReference)
{
if (itemsToPaste.Count == 1)
{
// Single Paste
UpdateItem(itemsToPaste[0]);
}
else
{
// Mutiple Paste.
IList<object> sortedList = CutCopyPasteHelper.SortFromMetaData(itemsToPaste, metaData);
Fx.Assert(this.Item == null, "multi-paste on item != null is not supported now");
this.DoAutoWrapDrop(InsertionPosition.None, sortedList);
}
}
public WorkflowViewElementAutomationPeer(WorkflowViewElement owner)
: base(owner)
{
this.owner = owner;
}
void BeginDropAnimation(WorkflowViewElement target)
{
DropAnimation opacityAnimation = new DropAnimation();
target.BeginAnimation(FrameworkElement.OpacityProperty, opacityAnimation);
}
void StoreShapeLocationViewState(WorkflowViewElement view, Point newLocation)
{
StoreShapeLocationViewState(view.ModelItem, newLocation);
}
static void OnModelItemChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e)
{
WorkflowViewElement viewElement = (WorkflowViewElement)dependencyObject;
viewElement.OnModelItemChanged(e.NewValue);
}
static HashSet<ICompositeView> GetChildContainers(WorkflowViewElement workflowViewElement)
{
HashSet<ICompositeView> childContainers = null;
if (workflowViewElement != null && workflowViewElement.ShowExpanded)
{
childContainers = (HashSet<ICompositeView>)workflowViewElement.GetValue(CutCopyPasteHelper.ChildContainersProperty);
}
return childContainers;
}
void BeginDropAnimation(WorkflowViewElement target)
{
DropAnimation opacityAnimation = new DropAnimation();
target.BeginAnimation(FrameworkElement.OpacityProperty, opacityAnimation);
}
void PerformInternalMove(WorkflowViewElement movedElement, Point newPoint, Point shapeAnchorPoint)
{
using (EditingScope es = (EditingScope)this.ModelItem.BeginEdit(SR.ItemMove))
{
RemoveAdorner(movedElement, typeof(ConnectionPointsAdorner));
Point newLocation = SnapVisualToGrid(movedElement, newPoint, shapeAnchorPoint);
object viewState = this.ViewStateService.RetrieveViewState(movedElement.ModelItem, ShapeLocationViewStateKey);
if (viewState != null)
{
Point oldLocation = (Point)viewState;
// To make sure the connectors are still connected to the connection points
this.OffsetConnectorViewState(movedElement.ModelItem, oldLocation, newLocation);
}
this.StoreShapeLocationViewState(movedElement, newLocation);
// To make sure the connector changes are undoable
this.StoreAttachedConnectorViewStates(movedElement);
es.Complete();
}
}
public void OnItemsPasted(List<object> itemsToPaste, List<object> metaData, Point pastePoint, WorkflowViewElement pastePointReference)
{
// first see if a spacer is selected.
int index = this.selectedSpacerIndex;
// else see if we can paste after a selected child
if (index < 0)
{
Selection currentSelection = this.Context.Items.GetValue<Selection>();
index = this.Items.IndexOf(currentSelection.PrimarySelection);
//paste after the selected child
if (index >= 0)
{
index++;
}
}
if (index < 0)
{
index = addAtEndMarker;
}
IList<object> mergedItemsToPaste = CutCopyPasteHelper.SortFromMetaData(itemsToPaste, metaData);
List<ModelItem> modelItemsToSelect = new List<ModelItem>();
foreach (object itemToPaste in mergedItemsToPaste)
{
if (IsDropAllowed(itemToPaste))
{
if (index == addAtEndMarker)
{
modelItemsToSelect.Add(this.Items.Add(itemToPaste));
}
else
{
modelItemsToSelect.Add(this.Items.Insert(index, itemToPaste));
}
if (index >= 0)
{
index++;
}
}
}
this.Dispatcher.BeginInvoke(
new Action(() =>
{
this.Context.Items.SetValue(new Selection(modelItemsToSelect));
}),
Windows.Threading.DispatcherPriority.ApplicationIdle,
null);
}
public void OnItemsPasted(List <object> itemsToPaste, List <object> metaData, Point pastePoint, WorkflowViewElement pastePointReference)
{
// first see if a spacer is selected.
int index = this.selectedSpacerIndex;
// else see if we can paste after a selected child
if (index < 0)
{
Selection currentSelection = this.Context.Items.GetValue <Selection>();
index = this.Items.IndexOf(currentSelection.PrimarySelection);
//paste after the selected child
if (index >= 0)
{
index++;
}
}
if (index < 0)
{
index = addAtEndMarker;
}
IList <object> mergedItemsToPaste = CutCopyPasteHelper.SortFromMetaData(itemsToPaste, metaData);
List <ModelItem> modelItemsToSelect = new List <ModelItem>();
foreach (object itemToPaste in mergedItemsToPaste)
{
if (IsDropAllowed(itemToPaste))
{
if (index == addAtEndMarker)
{
modelItemsToSelect.Add(this.Items.Add(itemToPaste));
}
else
{
modelItemsToSelect.Add(this.Items.Insert(index, itemToPaste));
}
if (index >= 0)
{
index++;
}
}
}
this.Dispatcher.BeginInvoke(
new Action(() =>
{
this.Context.Items.SetValue(new Selection(modelItemsToSelect));
}),
Windows.Threading.DispatcherPriority.ApplicationIdle,
null);
}
public void OnItemsPasted(List<object> itemsToPaste, List<object> metaData, Point pastePoint, WorkflowViewElement pastePointReference)
{
List<ModelItem> modelItemsPasted = new List<ModelItem>();
List<State> states = new List<State>();
foreach (object obj in itemsToPaste)
{
State state;
if (obj is FinalState)
{
state = new State() { DisplayName = SR.DefaultFinalStateDisplayName, IsFinal = true };
}
else
{
state = (State)obj;
if (state.DisplayName == null)
{
state.DisplayName = SR.DefaultStateDisplayName;
}
}
states.Add(state);
}
RemoveDanglingTransitions(states);
foreach (State state in states)
{
ModelItem stateModelItem = this.ModelItem.Properties[ChildStatesPropertyName].Collection.Add(state);
modelItemsPasted.Add(stateModelItem);
}
if (modelItemsPasted.Count > 0)
{
// translate location view states to be in the coordinate system of the pasting target
this.UpdateLocationViewStatesByMetaData(modelItemsPasted, metaData);
if (pastePoint.X > 0 && pastePoint.Y > 0)
{
if (pastePointReference != null)
{
pastePoint = pastePointReference.TranslatePoint(pastePoint, this.panel);
pastePoint.X = pastePoint.X < 0 ? 0 : pastePoint.X;
pastePoint.Y = pastePoint.Y < 0 ? 0 : pastePoint.Y;
}
this.UpdateLocationViewStatesByPoint(modelItemsPasted, pastePoint);
}
// If paste point is not available, paste the items to the top left corner.
else
{
this.UpdateLocationViewStatesToTopLeft(modelItemsPasted);
}
}
this.Context.Items.SetValue(new Selection(modelItemsPasted));
}
void RemoveStateVisual(WorkflowViewElement removedStateDesigner)
{
HashSet<Connector> connectorsToDelete = new HashSet<Connector>();
ModelService modelService = this.Context.Services.GetService<ModelService>();
List<UIElement> removedStateDesigners = new List<UIElement>();
removedStateDesigners.Add(removedStateDesigner);
removedStateDesigners.AddRange(GetAllChildStateDesigners(removedStateDesigner));
StateContainerEditor outmostEditor = this.GetOutmostStateContainerEditor();
foreach (UIElement designer in removedStateDesigners)
{
if (outmostEditor.activeSrcConnectionPoint != null)
{
List<ConnectionPoint> connectionPoints = GetConnectionPoints(designer);
if (connectionPoints.Contains(outmostEditor.activeSrcConnectionPoint))
{
outmostEditor.activeSrcConnectionPoint = null;
RemoveAdorner(outmostEditor.panel, typeof(ConnectorCreationAdorner));
}
}
if (outmostEditor.lastConnectionPointMouseUpElement == designer)
{
outmostEditor.lastConnectionPointMouseUpElement = null;
}
connectorsToDelete.UnionWith(GetAttachedConnectors(designer));
}
// Remove any connector visuals attached to this shape. This is required for the scenarios as follows:
// Copy and paste two connected States into StateMachine and undo the paste.
// The Transition is not removed as a model change. Hence the connector visual will remain dangling on the designer.
foreach (Connector connector in connectorsToDelete)
{
this.RemoveConnectorOnOutmostEditor(connector);
}
this.modelItemToUIElement.Remove(removedStateDesigner.ModelItem);
removedStateDesigner.MouseEnter -= new MouseEventHandler(OnChildElementMouseEnter);
removedStateDesigner.MouseLeave -= new MouseEventHandler(OnChildElementMouseLeave);
((FrameworkElement)removedStateDesigner).SizeChanged -= new SizeChangedEventHandler(OnChildElementSizeChanged);
this.panel.Children.Remove(removedStateDesigner);
// deselect removed item
if (this.Context != null)
{
HashSet<ModelItem> selectedItems = new HashSet<ModelItem>(this.Context.Items.GetValue<Selection>().SelectedObjects);
if (selectedItems.Contains(removedStateDesigner.ModelItem))
{
Selection.Toggle(this.Context, removedStateDesigner.ModelItem);
}
}
object locationOfShape = this.ViewStateService.RetrieveViewState(removedStateDesigner.ModelItem, StateContainerEditor.ShapeLocationViewStateKey);
if (locationOfShape != null)
{
this.shapeLocations.Remove((Point)locationOfShape);
}
}
// Move the object to correct position after drop
private void PostDropUpdateViewState(WorkflowViewElement view,
ModelItem flownodeMI,
AutoConnectDirections autoConnectDirection,
Connector connectorToSplit,
Point newPoint,
Point anchorPoint,
bool keepRelativePosition,
ShapeOffsetter shapeOffsetter)
{
Fx.Assert((view != null && flownodeMI != null),
"movedItem != null && flownodeMI != null");
Point shapeLocationPtr;
if (autoConnectDirection != AutoConnectDirections.None)
{
shapeLocationPtr = this.CalculateDropLocationForAutoConnect(autoConnectDirection, view.DesiredSize);
}
else
{
shapeLocationPtr = SnapVisualToGrid(view, newPoint, anchorPoint, keepRelativePosition);
if (!keepRelativePosition)
{
// To avoid overlaps
shapeLocationPtr = shapeOffsetter.OffsetShapeLocation(shapeLocationPtr);
}
}
if (connectorToSplit != null)
{
shapeLocationPtr = this.CalculateDropLocationForAutoSplit(newPoint, shapeLocationPtr, connectorToSplit, view.DesiredSize);
}
//
if (keepRelativePosition)
{
this.OffsetDroppedItemToNewPosition(flownodeMI, shapeLocationPtr);
}
else
{
this.StoreShapeViewState(flownodeMI, shapeLocationPtr);
}
}
internal static void DoPaste(EditingContext context, Point pastePoint, WorkflowViewElement pastePointReference)
{
if (context == null)
{
throw FxTrace.Exception.AsError(new ArgumentNullException("context"));
}
ModelItem modelItem = context.Items.GetValue<Selection>().PrimarySelection;
if (modelItem == null)
{
return;
}
//Get data from clipboard.
List<object> metaData = null;
List<object> clipboardObjects = GetFromClipboard(out metaData, context);
if (clipboardObjects != null)
{
using (EditingScope es = (EditingScope)modelItem.BeginEdit(SR.PasteUndoDescription))
{
if (clipboardObjects.Count == 3 && clipboardObjects[1] is Func<ModelItem, object, object>)
{
var factoryMethod = (Func<ModelItem, object, object>)clipboardObjects[1];
object result = factoryMethod(modelItem, clipboardObjects[2]);
clipboardObjects = new List<object>();
clipboardObjects.Add(result);
}
ICompositeView container = GetContainerForPaste(modelItem, pastePoint);
if (container != null)
{
container.OnItemsPasted(clipboardObjects, metaData, pastePoint, pastePointReference);
}
es.Complete();
}
}
}