protected override bool OnDragLeave()
{
//Invalidate so that we can clear the drag image and active placement glyphs
WorkflowView parentView = ParentView;
parentView.InvalidateClientRectangle(Rectangle.Empty);
DestroyDragFeedbackImages();
//Clear the control key flag
this.wasCtrlKeyPressed = false;
//Now we fire the drag leave event
if (this.dropTargetDesigner != null)
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragLeave();
}
//Clear the buffered designer as the drag drop has ended
this.dropTargetDesigner = null;
this.draggedActivities.Clear();
this.exceptionInDragDrop = false;
return(true);
}
private void Refresh()
{
WorkflowView parentView = base.ParentView;
for (int i = 0; i < this.actions.Count; i++)
{
parentView.InvalidateClientRectangle(this.GetActionBounds(i));
}
}
protected override bool OnDragDrop(DragEventArgs eventArgs)
{
//Invalidate the entire rectangle so that we draw active placement glyphs on connectors
WorkflowView parentView = ParentView;
parentView.InvalidateClientRectangle(Rectangle.Empty);
//By default we do not allow any drag drop operation
eventArgs.Effect = DragDropEffects.None;
DestroyDragFeedbackImages();
//Get the coordinates
Point clientPoint = parentView.PointToClient(new Point(eventArgs.X, eventArgs.Y));
Point logicalPoint = parentView.ScreenPointToLogical(new Point(eventArgs.X, eventArgs.Y));
//Now we check if the drag drop was in any valid area, if not then do not proceed further
if (!parentView.IsClientPointInActiveLayout(clientPoint))
{
if (this.dropTargetDesigner != null)
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragLeave();
}
this.wasCtrlKeyPressed = false;
this.dropTargetDesigner = null;
this.draggedActivities.Clear();
return(false);
}
//Now we have a potential for successful drag drop, so construct drag event arguments with logical coordinates
this.wasCtrlKeyPressed = ((eventArgs.KeyState & 8) == 8);
ActivityDragEventArgs dragdropEventArgs = new ActivityDragEventArgs(eventArgs, this.dragInitiationPoint, logicalPoint, this.draggedActivities);
//Now check which designer is under the cursor, if we have the same designer as the old one
//If not then we set the new one as drop target and pump in messages
HitTestInfo hitTestInfo = MessageHitTestContext;
if (this.dropTargetDesigner != hitTestInfo.AssociatedDesigner)
{
if (this.dropTargetDesigner != null)
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragLeave();
this.dropTargetDesigner = null;
}
if (hitTestInfo.AssociatedDesigner != null)
{
this.dropTargetDesigner = hitTestInfo.AssociatedDesigner;
if (this.dropTargetDesigner != null)
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragEnter(dragdropEventArgs);
}
}
}
//We now have appropriate droptarget designer
try
{
if (this.dropTargetDesigner != null)
{
//We do not allow recursive drag and drop
if (!this.wasCtrlKeyPressed && IsRecursiveDropOperation(this.dropTargetDesigner) ||
(this.dropTargetDesigner is CompositeActivityDesigner && !((CompositeActivityDesigner)this.dropTargetDesigner).IsEditable))
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragLeave();
dragdropEventArgs.Effect = DragDropEffects.None;
}
else
{
// IMPORTANT: Don't use draggedActivities variable, because components which are
// there may not be created using the assembly references added to ITypeResultionService
// this.workflowView.time the components will be created using the assembly references got added to the project
List <Activity> droppedActivities = new List <Activity>();
string transactionDescription = SR.GetString(SR.DragDropActivities);
//This means that we are trying to move activities so we use the same activities for drop
if (!this.wasCtrlKeyPressed && this.existingDraggedActivities.Count > 0)
{
droppedActivities.AddRange(this.existingDraggedActivities);
if (droppedActivities.Count > 1)
{
transactionDescription = SR.GetString(SR.MoveMultipleActivities, droppedActivities.Count);
}
else if (droppedActivities.Count == 1)
{
transactionDescription = SR.GetString(SR.MoveSingleActivity, droppedActivities[0].GetType());
}
}
else
{
droppedActivities.AddRange(CompositeActivityDesigner.DeserializeActivitiesFromDataObject(ParentView, eventArgs.Data, true));
if (droppedActivities.Count > 0)
{
transactionDescription = SR.GetString(SR.CreateActivityFromToolbox, droppedActivities[0].GetType());
}
}
//Now that we have what needs to be dropped, we start the actual drag and drop
IDesignerHost designerHost = GetService(typeof(IDesignerHost)) as IDesignerHost;
DesignerTransaction transaction = null;
if (droppedActivities.Count > 0)
{
transaction = designerHost.CreateTransaction(transactionDescription);
}
dragdropEventArgs = new ActivityDragEventArgs(eventArgs, this.dragInitiationPoint, logicalPoint, droppedActivities);
try
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragDrop(dragdropEventArgs);
if (dragdropEventArgs.Effect == DragDropEffects.Move)
{
this.existingDraggedActivities.Clear();
}
if (transaction != null)
{
transaction.Commit();
}
}
catch (Exception e)
{
if (transaction != null)
{
transaction.Cancel();
}
throw e;
}
//We deserialize the designers and try to store the designer states
if (droppedActivities.Count > 0)
{
Stream componentStateStream = eventArgs.Data.GetData(DragDropManager.CF_DESIGNERSTATE) as Stream;
if (componentStateStream != null)
{
Helpers.DeserializeDesignersFromStream(droppedActivities, componentStateStream);
}
//Set the current selection
ISelectionService selectionService = (ISelectionService)GetService(typeof(ISelectionService));
if (selectionService != null)
{
selectionService.SetSelectedComponents(droppedActivities, SelectionTypes.Replace);
}
}
//Active the design surface
if (designerHost != null)
{
designerHost.Activate();
}
}
}
}
catch (Exception ex)
{
//We purposely consume application thrown exception which are result of user cancelling the action
//during dragdrop where we popup UI Wizards during drag drop. Ref: InvokeWebService
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragLeave();
dragdropEventArgs.Effect = DragDropEffects.None;
string dragDropException = ex.Message;
if (ex.InnerException != null && !String.IsNullOrEmpty(ex.InnerException.Message))
{
dragDropException = ex.InnerException.Message;
}
string errorMessage = DR.GetString(DR.Error_FailedToDeserializeComponents);
errorMessage += "\r\n" + DR.GetString(DR.Error_Reason, dragDropException);
DesignerHelpers.ShowError(ParentView, errorMessage);
if (ex != CheckoutException.Canceled)
{
throw new Exception(errorMessage, ex);
}
}
finally
{
//Make sure that mouse over designer is set to null
this.wasCtrlKeyPressed = false;
this.draggedActivities.Clear();
this.dropTargetDesigner = null;
this.exceptionInDragDrop = false;
eventArgs.Effect = dragdropEventArgs.Effect;
}
return(true);
}
protected override bool OnDragOver(DragEventArgs eventArgs)
{
//By default we do not allow any drag drop operation
eventArgs.Effect = DragDropEffects.None;
this.wasCtrlKeyPressed = false;
this.dragImageSnapped = false;
//Get the coordinates
WorkflowView parentView = ParentView;
Point clientPoint = parentView.PointToClient(new Point(eventArgs.X, eventArgs.Y));
Point logicalPoint = parentView.ScreenPointToLogical(new Point(eventArgs.X, eventArgs.Y));
//Update the drag image position
Point oldDragImagePoint = this.dragImagePointInClientCoOrd;
this.dragImagePointInClientCoOrd = new Point(clientPoint.X + SystemInformation.CursorSize.Width / 4, clientPoint.Y + SystemInformation.CursorSize.Height / 4);
//Now check if the drag point is in active layout if not then clear the designer
if (!parentView.IsClientPointInActiveLayout(clientPoint))
{
if (this.dropTargetDesigner != null)
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragLeave();
}
this.dropTargetDesigner = null;
}
else
{
//Now we have a potential for successful drag drop, so construct drag event arguments with logical coordinates
this.wasCtrlKeyPressed = ((eventArgs.KeyState & 8) == 8);
ActivityDragEventArgs dragdropEventArgs = new ActivityDragEventArgs(eventArgs, this.dragInitiationPoint, logicalPoint, this.draggedActivities);
//Now check which designer is under the cursor, if there is no designer then we return
HitTestInfo hitTestInfo = MessageHitTestContext;
ActivityDesigner potentialDropTargetDesigner = hitTestInfo.AssociatedDesigner;
if (potentialDropTargetDesigner != null)
{
CompositeActivityDesigner compositeDesigner = potentialDropTargetDesigner as CompositeActivityDesigner;
if ((!this.wasCtrlKeyPressed && IsRecursiveDropOperation(potentialDropTargetDesigner)) ||
(compositeDesigner != null && !compositeDesigner.IsEditable))
{
dragdropEventArgs.Effect = DragDropEffects.None;
potentialDropTargetDesigner = null;
}
}
//If the designers differ then send appropriate messages
if (this.dropTargetDesigner != potentialDropTargetDesigner)
{
if (this.dropTargetDesigner != null)
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragLeave();
}
this.dropTargetDesigner = potentialDropTargetDesigner;
if (this.dropTargetDesigner != null)
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragEnter(dragdropEventArgs);
}
}
else
{
//Looks like we got the same designer
if (this.dropTargetDesigner != null)
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragOver(dragdropEventArgs);
}
//Check if there is a potential for the drag image to be snapped
if (DragDropEffects.None != dragdropEventArgs.Effect && !dragdropEventArgs.DragImageSnapPoint.IsEmpty)
{
Point midPointInClientCoOrd = parentView.LogicalPointToClient(dragdropEventArgs.DragImageSnapPoint);
Size dragImageIconSize = parentView.LogicalSizeToClient(AmbientTheme.DragImageIconSize);
this.dragImagePointInClientCoOrd = new Point(midPointInClientCoOrd.X - dragImageIconSize.Width / 2, midPointInClientCoOrd.Y - dragImageIconSize.Height / 2);
this.dragImageSnapped = true;
}
}
eventArgs.Effect = dragdropEventArgs.Effect;
}
//
if (this.dragImage != null)
{
parentView.InvalidateClientRectangle(new Rectangle(oldDragImagePoint, this.dragImage.Size));
parentView.InvalidateClientRectangle(new Rectangle(this.dragImagePointInClientCoOrd, this.dragImage.Size));
}
if (eventArgs.Effect == DragDropEffects.None && this.exceptionInDragDrop)
{
eventArgs.Effect = (this.wasCtrlKeyPressed) ? DragDropEffects.Copy : DragDropEffects.Move;
}
return(true);
}
protected override bool OnDragEnter(DragEventArgs eventArgs)
{
//We purposely pass the DragEnter thru to the next behavior so that the WindowingBehavior can clear the
//active designer
Debug.Assert(this.dropTargetDesigner == null);
//Invalidate the entire rectangle so that we draw active placement glyphs on connectors
WorkflowView parentView = ParentView;
parentView.InvalidateClientRectangle(Rectangle.Empty);
//By default we do not allow any drag drop operation
eventArgs.Effect = DragDropEffects.None;
this.wasCtrlKeyPressed = false;
//Now cache the components which are getting dragged so that we don't need to create them again and again
if (this.existingDraggedActivities.Count > 0)
{
this.draggedActivities.AddRange(this.existingDraggedActivities);
}
else
{
try
{
Activity[] activities = CompositeActivityDesigner.DeserializeActivitiesFromDataObject(ParentView, eventArgs.Data);
if (activities != null)
{
this.draggedActivities.AddRange(activities);
}
}
catch
{
this.exceptionInDragDrop = true;
}
}
//Get the coordinates
Point clientPoint = parentView.PointToClient(new Point(eventArgs.X, eventArgs.Y));
Point logicalPoint = parentView.ScreenPointToLogical(new Point(eventArgs.X, eventArgs.Y));
//Now try to create the drag image and invalidate the area so that we can draw the dragged image
Debug.Assert(this.dragImage == null);
CreateDragFeedbackImages(this.draggedActivities);
if (this.dragImage != null)
{
this.dragImagePointInClientCoOrd = new Point(clientPoint.X + SystemInformation.CursorSize.Width / 4, clientPoint.Y + SystemInformation.CursorSize.Height / 4);
}
//If the hit is not in the layouts then we need to bail out, this is very important
if (!parentView.IsClientPointInActiveLayout(clientPoint))
{
return(false);
}
//Now we have a potential for successful drag drop, so construct drag event arguments with logical coordinates
this.wasCtrlKeyPressed = ((eventArgs.KeyState & 8) == 8);
ActivityDragEventArgs dragdropEventArgs = new ActivityDragEventArgs(eventArgs, this.dragInitiationPoint, logicalPoint, this.draggedActivities);
//Now check which designer is under the cursor, if there is no designer then we return
HitTestInfo hitTestInfo = MessageHitTestContext;
ActivityDesigner potentialDropTargetDesigner = hitTestInfo.AssociatedDesigner;
if (potentialDropTargetDesigner == null)
{
return(false);
}
//Now that we found a potential droptarget designer, make sure that we can start drag drop
//If the drag drop can not be performed then return.
if (!this.wasCtrlKeyPressed && IsRecursiveDropOperation(potentialDropTargetDesigner))
{
return(false);
}
CompositeActivityDesigner compositeDesigner = potentialDropTargetDesigner as CompositeActivityDesigner;
if (compositeDesigner != null && !compositeDesigner.IsEditable)
{
return(false);
}
//Now that we can truely perform drag and drop operation we can pump in the message
this.dropTargetDesigner = potentialDropTargetDesigner;
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragEnter(dragdropEventArgs);
//Check the return value, if this is a potential snap location then we need to snap the image
if (!dragdropEventArgs.DragImageSnapPoint.IsEmpty)
{
Point midPointInClientCoOrd = parentView.LogicalPointToClient(dragdropEventArgs.DragImageSnapPoint);
Size dragImageIconSize = parentView.LogicalSizeToClient(AmbientTheme.DragImageIconSize);
this.dragImagePointInClientCoOrd = new Point(midPointInClientCoOrd.X - dragImageIconSize.Width / 2, midPointInClientCoOrd.Y - dragImageIconSize.Height / 2);
this.dragImageSnapped = true;
}
eventArgs.Effect = dragdropEventArgs.Effect;
if (eventArgs.Effect == DragDropEffects.None && this.exceptionInDragDrop)
{
eventArgs.Effect = (this.wasCtrlKeyPressed) ? DragDropEffects.Copy : DragDropEffects.Move;
}
return(true);
}
protected override bool OnDragOver(DragEventArgs eventArgs)
{
eventArgs.Effect = DragDropEffects.None;
this.wasCtrlKeyPressed = false;
this.dragImageSnapped = false;
WorkflowView parentView = base.ParentView;
Point clientPoint = parentView.PointToClient(new Point(eventArgs.X, eventArgs.Y));
Point point = parentView.ScreenPointToLogical(new Point(eventArgs.X, eventArgs.Y));
Point dragImagePointInClientCoOrd = this.dragImagePointInClientCoOrd;
this.dragImagePointInClientCoOrd = new Point(clientPoint.X + (SystemInformation.CursorSize.Width / 4), clientPoint.Y + (SystemInformation.CursorSize.Height / 4));
if (!parentView.IsClientPointInActiveLayout(clientPoint))
{
if (this.dropTargetDesigner != null)
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragLeave();
}
this.dropTargetDesigner = null;
}
else
{
this.wasCtrlKeyPressed = (eventArgs.KeyState & 8) == 8;
ActivityDragEventArgs e = new ActivityDragEventArgs(eventArgs, this.dragInitiationPoint, point, this.draggedActivities);
ActivityDesigner associatedDesigner = base.MessageHitTestContext.AssociatedDesigner;
if (associatedDesigner != null)
{
CompositeActivityDesigner designer2 = associatedDesigner as CompositeActivityDesigner;
if ((!this.wasCtrlKeyPressed && this.IsRecursiveDropOperation(associatedDesigner)) || ((designer2 != null) && !designer2.IsEditable))
{
e.Effect = DragDropEffects.None;
associatedDesigner = null;
}
}
if (this.dropTargetDesigner != associatedDesigner)
{
if (this.dropTargetDesigner != null)
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragLeave();
}
this.dropTargetDesigner = associatedDesigner;
if (this.dropTargetDesigner != null)
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragEnter(e);
}
}
else
{
if (this.dropTargetDesigner != null)
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragOver(e);
}
if ((e.Effect != DragDropEffects.None) && !e.DragImageSnapPoint.IsEmpty)
{
Point point4 = parentView.LogicalPointToClient(e.DragImageSnapPoint);
Size size = parentView.LogicalSizeToClient(AmbientTheme.DragImageIconSize);
this.dragImagePointInClientCoOrd = new Point(point4.X - (size.Width / 2), point4.Y - (size.Height / 2));
this.dragImageSnapped = true;
}
}
eventArgs.Effect = e.Effect;
}
if (this.dragImage != null)
{
parentView.InvalidateClientRectangle(new Rectangle(dragImagePointInClientCoOrd, this.dragImage.Size));
parentView.InvalidateClientRectangle(new Rectangle(this.dragImagePointInClientCoOrd, this.dragImage.Size));
}
if ((eventArgs.Effect == DragDropEffects.None) && this.exceptionInDragDrop)
{
eventArgs.Effect = this.wasCtrlKeyPressed ? DragDropEffects.Copy : DragDropEffects.Move;
}
return(true);
}
protected override bool OnDragEnter(DragEventArgs eventArgs)
{
WorkflowView parentView = base.ParentView;
parentView.InvalidateClientRectangle(Rectangle.Empty);
eventArgs.Effect = DragDropEffects.None;
this.wasCtrlKeyPressed = false;
if (this.existingDraggedActivities.Count > 0)
{
this.draggedActivities.AddRange(this.existingDraggedActivities);
}
else
{
try
{
Activity[] collection = CompositeActivityDesigner.DeserializeActivitiesFromDataObject(base.ParentView, eventArgs.Data);
if (collection != null)
{
this.draggedActivities.AddRange(collection);
}
}
catch
{
this.exceptionInDragDrop = true;
}
}
Point clientPoint = parentView.PointToClient(new Point(eventArgs.X, eventArgs.Y));
Point point = parentView.ScreenPointToLogical(new Point(eventArgs.X, eventArgs.Y));
this.CreateDragFeedbackImages(this.draggedActivities);
if (this.dragImage != null)
{
this.dragImagePointInClientCoOrd = new Point(clientPoint.X + (SystemInformation.CursorSize.Width / 4), clientPoint.Y + (SystemInformation.CursorSize.Height / 4));
}
if (!parentView.IsClientPointInActiveLayout(clientPoint))
{
return(false);
}
this.wasCtrlKeyPressed = (eventArgs.KeyState & 8) == 8;
ActivityDragEventArgs e = new ActivityDragEventArgs(eventArgs, this.dragInitiationPoint, point, this.draggedActivities);
ActivityDesigner associatedDesigner = base.MessageHitTestContext.AssociatedDesigner;
if (associatedDesigner == null)
{
return(false);
}
if (!this.wasCtrlKeyPressed && this.IsRecursiveDropOperation(associatedDesigner))
{
return(false);
}
CompositeActivityDesigner designer2 = associatedDesigner as CompositeActivityDesigner;
if ((designer2 != null) && !designer2.IsEditable)
{
return(false);
}
this.dropTargetDesigner = associatedDesigner;
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragEnter(e);
if (!e.DragImageSnapPoint.IsEmpty)
{
Point point3 = parentView.LogicalPointToClient(e.DragImageSnapPoint);
Size size = parentView.LogicalSizeToClient(AmbientTheme.DragImageIconSize);
this.dragImagePointInClientCoOrd = new Point(point3.X - (size.Width / 2), point3.Y - (size.Height / 2));
this.dragImageSnapped = true;
}
eventArgs.Effect = e.Effect;
if ((eventArgs.Effect == DragDropEffects.None) && this.exceptionInDragDrop)
{
eventArgs.Effect = this.wasCtrlKeyPressed ? DragDropEffects.Copy : DragDropEffects.Move;
}
return(true);
}
protected override bool OnDragDrop(DragEventArgs eventArgs)
{
WorkflowView parentView = base.ParentView;
parentView.InvalidateClientRectangle(Rectangle.Empty);
eventArgs.Effect = DragDropEffects.None;
this.DestroyDragFeedbackImages();
Point clientPoint = parentView.PointToClient(new Point(eventArgs.X, eventArgs.Y));
Point point = parentView.ScreenPointToLogical(new Point(eventArgs.X, eventArgs.Y));
if (!parentView.IsClientPointInActiveLayout(clientPoint))
{
if (this.dropTargetDesigner != null)
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragLeave();
}
this.wasCtrlKeyPressed = false;
this.dropTargetDesigner = null;
this.draggedActivities.Clear();
return(false);
}
this.wasCtrlKeyPressed = (eventArgs.KeyState & 8) == 8;
ActivityDragEventArgs e = new ActivityDragEventArgs(eventArgs, this.dragInitiationPoint, point, this.draggedActivities);
System.Workflow.ComponentModel.Design.HitTestInfo messageHitTestContext = base.MessageHitTestContext;
if (this.dropTargetDesigner != messageHitTestContext.AssociatedDesigner)
{
if (this.dropTargetDesigner != null)
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragLeave();
this.dropTargetDesigner = null;
}
if (messageHitTestContext.AssociatedDesigner != null)
{
this.dropTargetDesigner = messageHitTestContext.AssociatedDesigner;
if (this.dropTargetDesigner != null)
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragEnter(e);
}
}
}
try
{
if (this.dropTargetDesigner != null)
{
if ((!this.wasCtrlKeyPressed && this.IsRecursiveDropOperation(this.dropTargetDesigner)) || ((this.dropTargetDesigner is CompositeActivityDesigner) && !((CompositeActivityDesigner)this.dropTargetDesigner).IsEditable))
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragLeave();
e.Effect = DragDropEffects.None;
}
else
{
List <Activity> draggedActivities = new List <Activity>();
string description = SR.GetString("DragDropActivities");
if (!this.wasCtrlKeyPressed && (this.existingDraggedActivities.Count > 0))
{
draggedActivities.AddRange(this.existingDraggedActivities);
if (draggedActivities.Count > 1)
{
description = SR.GetString("MoveMultipleActivities", new object[] { draggedActivities.Count });
}
else if (draggedActivities.Count == 1)
{
description = SR.GetString("MoveSingleActivity", new object[] { draggedActivities[0].GetType() });
}
}
else
{
draggedActivities.AddRange(CompositeActivityDesigner.DeserializeActivitiesFromDataObject(base.ParentView, eventArgs.Data, true));
if (draggedActivities.Count > 0)
{
description = SR.GetString("CreateActivityFromToolbox", new object[] { draggedActivities[0].GetType() });
}
}
IDesignerHost host = base.GetService(typeof(IDesignerHost)) as IDesignerHost;
DesignerTransaction transaction = null;
if (draggedActivities.Count > 0)
{
transaction = host.CreateTransaction(description);
}
e = new ActivityDragEventArgs(eventArgs, this.dragInitiationPoint, point, draggedActivities);
try
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragDrop(e);
if (e.Effect == DragDropEffects.Move)
{
this.existingDraggedActivities.Clear();
}
if (transaction != null)
{
transaction.Commit();
}
}
catch (Exception exception)
{
if (transaction != null)
{
transaction.Cancel();
}
throw exception;
}
if (draggedActivities.Count > 0)
{
Stream data = eventArgs.Data.GetData("CF_WINOEDESIGNERCOMPONENTSSTATE") as Stream;
if (data != null)
{
Helpers.DeserializeDesignersFromStream(draggedActivities, data);
}
ISelectionService service = (ISelectionService)base.GetService(typeof(ISelectionService));
if (service != null)
{
service.SetSelectedComponents(draggedActivities, SelectionTypes.Replace);
}
}
if (host != null)
{
host.Activate();
}
}
}
}
catch (Exception exception2)
{
((IWorkflowDesignerMessageSink)this.dropTargetDesigner).OnDragLeave();
e.Effect = DragDropEffects.None;
string message = exception2.Message;
if ((exception2.InnerException != null) && !string.IsNullOrEmpty(exception2.InnerException.Message))
{
message = exception2.InnerException.Message;
}
string str3 = DR.GetString("Error_FailedToDeserializeComponents", new object[0]) + "\r\n" + DR.GetString("Error_Reason", new object[] { message });
DesignerHelpers.ShowError(base.ParentView, str3);
if (exception2 != CheckoutException.Canceled)
{
throw new Exception(str3, exception2);
}
}
finally
{
this.wasCtrlKeyPressed = false;
this.draggedActivities.Clear();
this.dropTargetDesigner = null;
this.exceptionInDragDrop = false;
eventArgs.Effect = e.Effect;
}
return(true);
}
