private void InitiateDragDrop()
{
WorkflowView parentView = ParentView;
ISelectionService selectionService = (ISelectionService)GetService(typeof(ISelectionService));
IDesignerHost designerHost = (IDesignerHost)GetService(typeof(IDesignerHost));
if (selectionService == null || designerHost == null)
{
return;
}
// check if we are cutting root component
ICollection components = selectionService.GetSelectedComponents();
if (components == null || components.Count < 1 || selectionService.GetComponentSelected(designerHost.RootComponent) || !Helpers.AreAllActivities(components))
{
return;
}
DragDropEffects effects = DragDropEffects.None;
try
{
// get component serialization service
this.existingDraggedActivities.AddRange(Helpers.GetTopLevelActivities(components));
//IMPORTANT: FOR WITHIN DESIGNER COMPONENT MOVE WE REMOVE THE ACTIVITIES BEFORE WE ADD THEM WHICH IS IN
//ONDRAGDROP FUNCTION. ALTHOUGH THIS VIOLATES THE DODRAGDROP FUNCTION SIMANTICS, WE NEED TO DO THIS
//SO THAT WE CAN USE THE SAME IDS FOR THE ACTIVITIES
DragDropEffects allowedEffects = (DesignerHelpers.AreAssociatedDesignersMovable(this.existingDraggedActivities)) ? DragDropEffects.Move | DragDropEffects.Copy : DragDropEffects.Copy;
IDataObject dataObject = CompositeActivityDesigner.SerializeActivitiesToDataObject(ParentView, this.existingDraggedActivities.ToArray());
effects = parentView.DoDragDrop(dataObject, allowedEffects);
//
}
catch (Exception e)
{
DesignerHelpers.ShowError(ParentView, e.Message);
}
finally
{
//This means drag drop occurred across designer
if (effects == DragDropEffects.Move && this.existingDraggedActivities.Count > 0)
{
string transactionDescription = String.Empty;
if (this.existingDraggedActivities.Count > 1)
{
transactionDescription = SR.GetString(SR.MoveMultipleActivities, this.existingDraggedActivities.Count);
}
else
{
transactionDescription = SR.GetString(SR.MoveSingleActivity, this.existingDraggedActivities[0].GetType());
}
CompositeActivityDesigner.RemoveActivities(ParentView, this.existingDraggedActivities.AsReadOnly(), transactionDescription);
}
this.existingDraggedActivities.Clear();
}
}
internal bool IsValidDropContext(HitTestInfo dropLocation)
{
if (this.draggedActivities.Count == 0)
{
return(false);
}
if (dropLocation == null || dropLocation.AssociatedDesigner == null)
{
return(false);
}
CompositeActivityDesigner compositeDesigner = dropLocation.AssociatedDesigner as CompositeActivityDesigner;
if (compositeDesigner == null)
{
return(false);
}
if (!compositeDesigner.IsEditable || !compositeDesigner.CanInsertActivities(dropLocation, new List <Activity>(this.draggedActivities).AsReadOnly()))
{
return(false);
}
if (!this.wasCtrlKeyPressed && this.existingDraggedActivities.Count > 0)
{
//We are trying to move the actvities with designer
if (!DesignerHelpers.AreAssociatedDesignersMovable(this.draggedActivities))
{
return(false);
}
if (IsRecursiveDropOperation(dropLocation.AssociatedDesigner))
{
return(false);
}
IDictionary commonParentActivities = Helpers.PairUpCommonParentActivities(this.draggedActivities);
foreach (DictionaryEntry entry in commonParentActivities)
{
CompositeActivityDesigner compositeActivityDesigner = ActivityDesigner.GetDesigner(entry.Key as Activity) as CompositeActivityDesigner;
Activity[] activitiesToMove = (Activity[])((ArrayList)entry.Value).ToArray(typeof(Activity));
if (compositeActivityDesigner != null && !compositeActivityDesigner.CanMoveActivities(dropLocation, new List <Activity>(activitiesToMove).AsReadOnly()))
{
return(false);
}
}
}
return(true);
}
private void InitiateDragDrop()
{
WorkflowView parentView = base.ParentView;
ISelectionService service = (ISelectionService)base.GetService(typeof(ISelectionService));
IDesignerHost host = (IDesignerHost)base.GetService(typeof(IDesignerHost));
if ((service != null) && (host != null))
{
ICollection selectedComponents = service.GetSelectedComponents();
if (((selectedComponents != null) && (selectedComponents.Count >= 1)) && (!service.GetComponentSelected(host.RootComponent) && Helpers.AreAllActivities(selectedComponents)))
{
DragDropEffects none = DragDropEffects.None;
try
{
this.existingDraggedActivities.AddRange(Helpers.GetTopLevelActivities(selectedComponents));
DragDropEffects allowedEffects = DesignerHelpers.AreAssociatedDesignersMovable(this.existingDraggedActivities) ? (DragDropEffects.Move | DragDropEffects.Copy) : DragDropEffects.Copy;
IDataObject data = CompositeActivityDesigner.SerializeActivitiesToDataObject(base.ParentView, this.existingDraggedActivities.ToArray());
none = parentView.DoDragDrop(data, allowedEffects);
}
catch (Exception exception)
{
DesignerHelpers.ShowError(base.ParentView, exception.Message);
}
finally
{
if ((none == DragDropEffects.Move) && (this.existingDraggedActivities.Count > 0))
{
string transactionDescription = string.Empty;
if (this.existingDraggedActivities.Count > 1)
{
transactionDescription = SR.GetString("MoveMultipleActivities", new object[] { this.existingDraggedActivities.Count });
}
else
{
transactionDescription = SR.GetString("MoveSingleActivity", new object[] { this.existingDraggedActivities[0].GetType() });
}
CompositeActivityDesigner.RemoveActivities(base.ParentView, this.existingDraggedActivities.AsReadOnly(), transactionDescription);
}
this.existingDraggedActivities.Clear();
}
}
}
}
internal bool IsValidDropContext(System.Workflow.ComponentModel.Design.HitTestInfo dropLocation)
{
if (this.draggedActivities.Count == 0)
{
return(false);
}
if ((dropLocation == null) || (dropLocation.AssociatedDesigner == null))
{
return(false);
}
CompositeActivityDesigner associatedDesigner = dropLocation.AssociatedDesigner as CompositeActivityDesigner;
if (associatedDesigner == null)
{
return(false);
}
if (!associatedDesigner.IsEditable || !associatedDesigner.CanInsertActivities(dropLocation, new List <Activity>(this.draggedActivities).AsReadOnly()))
{
return(false);
}
if (!this.wasCtrlKeyPressed && (this.existingDraggedActivities.Count > 0))
{
if (!DesignerHelpers.AreAssociatedDesignersMovable(this.draggedActivities))
{
return(false);
}
if (this.IsRecursiveDropOperation(dropLocation.AssociatedDesigner))
{
return(false);
}
foreach (DictionaryEntry entry in Helpers.PairUpCommonParentActivities(this.draggedActivities))
{
CompositeActivityDesigner designer = ActivityDesigner.GetDesigner(entry.Key as Activity) as CompositeActivityDesigner;
Activity[] collection = (Activity[])((ArrayList)entry.Value).ToArray(typeof(Activity));
if ((designer != null) && !designer.CanMoveActivities(dropLocation, new List <Activity>(collection).AsReadOnly()))
{
return(false);
}
}
}
return(true);
}
private void OnMenuCut(object sender, EventArgs e)
{
IDesignerHost service = this.serviceProvider.GetService(typeof(IDesignerHost)) as IDesignerHost;
if ((service == null) || !this.selectionService.GetComponentSelected(service.RootComponent))
{
ICollection selectedComponents = this.selectionService.GetSelectedComponents();
if (Helpers.AreAllActivities(selectedComponents) && DesignerHelpers.AreAssociatedDesignersMovable(selectedComponents))
{
this.OnMenuCopy(sender, e);
string description = string.Empty;
if (selectedComponents.Count > 1)
{
description = SR.GetString("CutMultipleActivities", new object[] { selectedComponents.Count });
}
else
{
ArrayList list = new ArrayList(selectedComponents);
if (list.Count > 0)
{
description = SR.GetString("CutSingleActivity", new object[] { (list[0] as Activity).Name });
}
else
{
description = SR.GetString("CutActivity");
}
}
DesignerTransaction transaction = service.CreateTransaction(description);
try
{
this.OnMenuDelete(sender, e);
transaction.Commit();
}
catch
{
transaction.Cancel();
}
}
}
}