public void Execute(Shape s, string context)
        {
            RationallyModel model     = Globals.RationallyAddIn.Model;
            VisioShape      component = new VisioShape(Globals.RationallyAddIn.Application.ActivePage)
            {
                Shape = s
            };

            int          index         = component.Index;
            Alternative  alternative   = model.Alternatives[index];
            DialogResult confirmResult = MessageBox.Show("Are you sure you want to delete " + alternative.Title + "?", "Confirm Deletion", MessageBoxButtons.YesNo);

            if (confirmResult == DialogResult.Yes)
            {
                Shape shapeToPass;

                if (AlternativeShape.IsAlternativeContainer(s.Name))
                {
                    shapeToPass = s;
                }
                else //subpart of alternative container
                {
                    //trace alternatives container
                    AlternativesContainer alternativesContainer = (AlternativesContainer)Globals.RationallyAddIn.View.Children.First(c => c is AlternativesContainer);
                    //trace the correct alternative container
                    AlternativeShape alternativeShape = (AlternativeShape)alternativesContainer.Children.First(c => c is AlternativeShape && (component.Index == c.Index));

                    shapeToPass = alternativeShape.Shape;
                }
                //initiate a delete handler with the container's shape
                shapeToPass.Delete();
            }
        }
        private void Application_CellChangedEvent(Cell cell)
        {
            Shape changedShape = cell.Shape;

            // ReSharper disable once MergeSequentialChecksWhenPossible
            if ((changedShape == null) || !changedShape.Document.Template.Contains(Information.TemplateName) || (changedShape.CellExistsU[VisioFormulas.Cell_RationallyType, (short)VisExistsFlags.visExistsAnywhere] != Constants.CellExists)) //No need to continue when the shape is not part of our model.
            {
                return;
            }
            try
            {
                if (RelatedUrlComponent.IsRelatedUrlComponent(changedShape.Name) && cell.LocalName.Equals(VisioFormulas.Cell_HyperlinkAddress)) //Link has updated
                {
                    Log.Debug("Cell changed of hyperlink shape:" + changedShape.Name);
                    //find the container that holds all Related Documents
                    RelatedDocumentsContainer relatedDocumentsContainer = (RelatedDocumentsContainer)View.Children.First(c => c is RelatedDocumentsContainer);
                    //find the related document holding the changed shape (one of his children has Shape equal to changedShape)
                    RelatedDocumentContainer relatedDocumentContainer = relatedDocumentsContainer.Children.Where(c => c is RelatedDocumentContainer).Cast <RelatedDocumentContainer>().First(dc => dc.Children.Where(c => c.Shape.Equals(changedShape)).ToList().Count > 0);
                    //update the text of the URL display component to the new url
                    RelatedURLURLComponent relatedURLURLComponent = (RelatedURLURLComponent)relatedDocumentContainer.Children.First(c => c is RelatedURLURLComponent);
                    relatedURLURLComponent.Text = changedShape.Hyperlink.Address;
                }
                else if (Application.IsUndoingOrRedoing && CheckBoxStateComponent.IsCheckBoxStateComponent(changedShape.Name) && cell.LocalName.Equals(VisioFormulas.Cell_BackGroundColour))
                {
                    CheckBoxStateComponent checkBoxState = View.GetComponentByShape(changedShape) as CheckBoxStateComponent;
                    if (checkBoxState != null)
                    {
                        Model.PlanningItems[checkBoxState.Index].Finished = checkBoxState.Checked;
                    }
                }
                else if (Application.IsUndoingOrRedoing && ForceContainer.IsForceContainer(changedShape.Name) && cell.LocalName.Equals(VisioFormulas.Cell_Index))
                {
                    Log.Debug("Forceindex cell changed of forcecontainer. shape:" + changedShape.Name);
                    VisioShape forcesComponent = View.Children.FirstOrDefault(x => x is ForcesContainer);
                    if (forcesComponent != null)
                    {
                        rebuildTree = true; //Wait with the rebuild till the undo is done
                    }
                }
                else if (Application.IsUndoingOrRedoing && AlternativeShape.IsAlternativeContainer(changedShape.Name) && cell.LocalName.Equals(VisioFormulas.Cell_Index))
                {
                    Log.Debug("Alternative index cell changed of alternativecontainer. shape:" + changedShape.Name);
                    VisioShape alternativesComponent = View.Children.FirstOrDefault(x => x is AlternativesContainer);
                    if (alternativesComponent != null)
                    {
                        rebuildTree = true; //Wait with the rebuild till the undo is done
                    }
                }
                else if (Application.IsUndoingOrRedoing && RelatedDocumentContainer.IsRelatedDocumentContainer(changedShape.Name) && cell.LocalName.Equals(VisioFormulas.Cell_Index))
                {
                    Log.Debug("Document index cell changed of documentcontainer. shape:" + changedShape.Name);
                    VisioShape docComponent = View.Children.FirstOrDefault(x => x is RelatedDocumentsContainer);
                    if (docComponent != null)
                    {
                        rebuildTree = true; //Wait with the rebuild till the undo is done
                    }
                }
                else if (Application.IsUndoingOrRedoing && StakeholderContainer.IsStakeholderContainer(changedShape.Name) && cell.LocalName.Equals(VisioFormulas.Cell_Index))
                {
                    Log.Debug("Stakeholder index cell changed of stakeholdercontainer. shape:" + changedShape.Name);
                    VisioShape stakeholderComponent = View.Children.FirstOrDefault(x => x is StakeholdersContainer);
                    if (stakeholderComponent != null)
                    {
                        rebuildTree = true; //Wait with the rebuild till the undo is done
                    }
                }
            }
            catch (Exception ex)
            {
                Log.Error(ex, ex);
#if DEBUG
                throw;
#endif
            }
        }