public Connection(Connector source, Connector sink)
{
DataContext = new DiagramRelationshipViewModel();
this.Source = source;
this.Sink = sink;
base.Unloaded += new RoutedEventHandler(Connection_Unloaded);
}
protected override void OnPreviewMouseMove(MouseEventArgs e)
{
if (e.LeftButton != MouseButtonState.Pressed)
{
dragStartPoint = null;
isDragging = false;
}
else if (dragStartPoint.HasValue && isDragging == false)
{
Point?currentPosition = new Point?(e.GetPosition(this));
if (currentPosition.HasValue && (Math.Abs(currentPosition.Value.X - dragStartPoint.Value.X) > 10 || Math.Abs(currentPosition.Value.Y - dragStartPoint.Value.Y) > 10))
{
isDragging = true;
DiagramRelationshipViewModel diagramView = new DiagramRelationshipViewModel();
diagramView.SourceItem = DataContext as PropertiesViewModel;
diagramView.Solution = diagramView.SourceItem.Solution;
diagramView.SourceDiagramEntityViewModel = ParentEntityDiagramControl.DataContext as DiagramEntityViewModel;
// custom drag/drop is disabled
//ParentDiagramControl.IsDragging = true;
//ParentDiagramControl.DragItem = diagramView;
//ParentEntityDiagramControl.HandleAdorner();
// DoDragDrop would be disabled if custom drag/drop approach with arc drawing adorner is utilized
DragDrop.DoDragDrop(this, diagramView, DragDropEffects.Link);
e.Handled = true;
}
}
}
void Connection_DataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
{
DiagramRelationshipViewModel view = DataContext as DiagramRelationshipViewModel;
SourceArrowSymbol = ArrowSymbol.Arrow;
SinkArrowSymbol = ArrowSymbol.Arrow;
string sourceMin = String.Empty, sourceMax = String.Empty, sinkMin = String.Empty, sinkMax = String.Empty;
if (view != null)
{
// set labels
if (view.RelationshipViewModel.EditRelationship.EntityID != view.RelationshipViewModel.EditRelationship.ReferencedEntityID)
{
sourceMin = view.RelationshipViewModel.EditRelationship.ItemsMin == -1 ? "*" : view.RelationshipViewModel.EditRelationship.ItemsMin.ToString();
sourceMax = view.RelationshipViewModel.EditRelationship.ItemsMax == -1 ? "*" : view.RelationshipViewModel.EditRelationship.ItemsMax.ToString();
sinkMin = view.RelationshipViewModel.EditRelationship.ReferencedItemsMin == -1 ? "*" : view.RelationshipViewModel.EditRelationship.ReferencedItemsMin.ToString();
sinkMax = view.RelationshipViewModel.EditRelationship.ReferencedItemsMax == -1 ? "*" : view.RelationshipViewModel.EditRelationship.ReferencedItemsMax.ToString();
SourceLabel = sourceMin == sourceMax ? sourceMin : sourceMin + ".." + sourceMax;
SinkLabel = sinkMin == sinkMax ? sinkMin : sinkMin + ".." + sinkMax;
}
// set many relationship
if (view.RelationshipViewModel.EditRelationship.ItemsMax == -1 || view.RelationshipViewModel.EditRelationship.ItemsMax > 0)
{
SourceArrowSymbol = ArrowSymbol.DoubleArrow;
}
// if primary key relationship, make diamond headed arrows
bool isPrimaryKeyRelationship = true;
if (view.RelationshipViewModel.Relationship.PropertyCount == 0 || view.RelationshipViewModel.Relationship.PropertyCount != view.RelationshipViewModel.Relationship.Entity.PrimaryKeyCount)
{
isPrimaryKeyRelationship = false;
}
else
{
foreach (RelationshipProperty property in view.RelationshipViewModel.Relationship.RelationshipPropertyList)
{
if (property.Property.IsPrimaryKeyMember == false || property.ReferencedProperty.IsPrimaryKeyMember == false)
{
isPrimaryKeyRelationship = false;
break;
}
}
}
if (isPrimaryKeyRelationship == true)
{
SourceArrowSymbol = ArrowSymbol.None;
SinkArrowSymbol = ArrowSymbol.Diamond;
SourceLabel = String.Empty;
SinkLabel = String.Empty;
}
UpdateSourceAndSink();
}
}
public void UpdateSourceAndSink()
{
DiagramRelationshipViewModel view = DataContext as DiagramRelationshipViewModel;
if (view != null)
{
DesignerCanvas designer = VisualItemHelper.VisualUpwardSearch <DesignerCanvas>(this) as DesignerCanvas;
EntityDiagramControl sourceControl = VisualItemHelper.FindChild <EntityDiagramControl>(designer, view.SourceDiagramEntityViewModel) as EntityDiagramControl;
EntityDiagramControl sinkControl = VisualItemHelper.FindChild <EntityDiagramControl>(designer, view.SinkDiagramEntityViewModel) as EntityDiagramControl;
if (sourceControl != null && sinkControl != null)
{
Source = sourceControl.GetBestConnector(sinkControl, false);
Sink = sinkControl.GetBestConnector(sourceControl, true);
}
}
}
public void HandleCustomDrop()
{
// handle "drop" of relationship in custom drag/drop approach with arc drawing adorner
if (DragItem is DiagramRelationshipViewModel)
{
DiagramViewModel diagramView = DataContext as DiagramViewModel;
DiagramEntityViewModel diagramEntityView = GetMouseOverEntity();
DiagramRelationshipViewModel dragRelationship = DragItem as DiagramRelationshipViewModel;
Point currentPosition = MouseUtilities.GetMousePosition(this);
if (dragRelationship != null && diagramEntityView != null)
{
dragRelationship.SinkDiagramEntityViewModel = diagramEntityView;
dragRelationship.Diagram = diagramView;
dialog = new Window();
dialog.Height = 450 * UserSettingsHelper.Instance.ControlSize;
dialog.Width = 650 * UserSettingsHelper.Instance.ControlSize;
dialog.Left = Math.Max(currentPosition.X, 20);
dialog.Top = Math.Max(currentPosition.Y, 20);
dialog.Content = new RelationshipDialogControl();
Relationship newRelationship = new Relationship();
newRelationship.RelationshipID = Guid.NewGuid();
newRelationship.Solution = dragRelationship.Solution;
newRelationship.ReferencedEntity = dragRelationship.SinkDiagramEntityViewModel.DiagramEntity.Entity;
newRelationship.Entity = dragRelationship.SourceDiagramEntityViewModel.DiagramEntity.Entity;
RelationshipViewModel newRelationshipView = new RelationshipViewModel(newRelationship, dragRelationship.Solution);
dialog.DataContext = newRelationshipView;
dialog.Title = newRelationshipView.Title;
newRelationshipView.RequestClose += new EventHandler(Item_RequestClose);
dialog.ShowDialog();
if (newRelationshipView.IsOK == true)
{
dragRelationship.RelationshipViewModel = newRelationshipView;
diagramView.CreateRelationship(dragRelationship);
}
dialog.Close();
dialog = null;
}
}
IsDragging = false;
DragItem = null;
}
protected override void OnMouseUp(MouseButtonEventArgs e)
{
if (HitConnector != null)
{
DiagramEntityViewModel sourceView = sourceConnector.DataContext as DiagramEntityViewModel;
DiagramEntityViewModel sinkView = HitConnector.DataContext as DiagramEntityViewModel;
if (DiagramViewModel != null && sourceView != null && sinkView != null)
{
Relationship relationship = new Relationship();
relationship.RelationshipID = Guid.NewGuid();
relationship.EntityID = sourceView.EntityID;
relationship.ReferencedEntityID = sinkView.EntityID;
// TODO: bring up dialog to set up new entity relationship properties
RelationshipViewModel relationshipViewModel = new RelationshipViewModel(relationship, sourceView.Solution);
DiagramRelationshipViewModel dropDiagramRelationship = new DiagramRelationshipViewModel(sourceView, sinkView, sourceView.Diagram, relationshipViewModel);
dropDiagramRelationship.ZIndex = 0;
DiagramViewModel.DiagramRelationships.Add(dropDiagramRelationship);
DiagramViewModel.ClearSelectedItems();
dropDiagramRelationship.IsSelected = true;
DiagramViewModel.Refresh(true);
}
}
if (HitDesignerItem != null)
{
this.HitDesignerItem.IsDragConnectionOver = false;
}
if (this.IsMouseCaptured)
{
this.ReleaseMouseCapture();
}
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(this.designerCanvas);
if (adornerLayer != null)
{
adornerLayer.Remove(this);
}
}
protected override void OnDrop(DragEventArgs e)
{
base.OnDrop(e);
Point currentPosition = MouseUtilities.GetMousePosition(this);
DiagramViewModel diagramView = ParentCanvas.DataContext as DiagramViewModel;
DiagramEntityViewModel diagramEntityView = DataContext as DiagramEntityViewModel;
if (diagramView != null && diagramEntityView != null)
{
// try drop as diagram relationship
DiagramRelationshipViewModel dragRelationship = e.Data.GetData(typeof(DiagramRelationshipViewModel)) as DiagramRelationshipViewModel;
if (dragRelationship != null)
{
dragRelationship.SinkDiagramEntityViewModel = diagramEntityView;
dragRelationship.Diagram = diagramView;
dialog = new Window();
dialog.Height = 450 * UserSettingsHelper.Instance.ControlSize;
dialog.Width = 650 * UserSettingsHelper.Instance.ControlSize;
dialog.Left = Math.Max(currentPosition.X, 20);
dialog.Top = Math.Max(currentPosition.Y, 20);
dialog.Content = new RelationshipDialogControl();
Relationship newRelationship = new Relationship();
newRelationship.RelationshipID = Guid.NewGuid();
newRelationship.Solution = dragRelationship.Solution;
newRelationship.ReferencedEntity = dragRelationship.SinkDiagramEntityViewModel.DiagramEntity.Entity;
newRelationship.Entity = dragRelationship.SourceDiagramEntityViewModel.DiagramEntity.Entity;
RelationshipViewModel newRelationshipView = new RelationshipViewModel(newRelationship, dragRelationship.Solution);
dialog.DataContext = newRelationshipView;
dialog.Title = newRelationshipView.Title;
newRelationshipView.RequestClose += new EventHandler(Item_RequestClose);
dialog.ShowDialog();
if (newRelationshipView.IsOK == true)
{
dragRelationship.RelationshipViewModel = newRelationshipView;
diagramView.CreateRelationship(dragRelationship);
}
dialog.Close();
dialog = null;
e.Handled = true;
return;
}
// try drop as collection
CollectionsViewModel dragCollections = e.Data.GetData(typeof(CollectionsViewModel)) as CollectionsViewModel;
if (dragCollections != null)
{
dialog = new Window();
dialog.Height = 450 * UserSettingsHelper.Instance.ControlSize;
dialog.Width = 400 * UserSettingsHelper.Instance.ControlSize;
dialog.Left = Math.Max(currentPosition.X, 20);
dialog.Top = Math.Max(currentPosition.Y, 20);
dialog.Content = new CollectionDialogControl();
Collection newProperty = new Collection();
newProperty.PropertyID = Guid.NewGuid();
newProperty.Solution = dragCollections.Solution;
newProperty.Entity = dragCollections.Entity;
newProperty.ReferencedEntity = diagramEntityView.DiagramEntity.Entity;
CollectionViewModel newPropertyView = new CollectionViewModel(newProperty, dragCollections.Solution);
dialog.DataContext = newPropertyView;
dialog.Title = newPropertyView.Title;
newPropertyView.RequestClose += new EventHandler(Item_RequestClose);
dialog.ShowDialog();
if (newPropertyView.IsOK == true)
{
dragCollections.AddCollection(newPropertyView);
}
dialog.Close();
dialog = null;
e.Handled = true;
return;
}
// try drop as property reference
PropertyReferencesViewModel dragPropertyReferences = e.Data.GetData(typeof(PropertyReferencesViewModel)) as PropertyReferencesViewModel;
if (dragPropertyReferences != null)
{
dialog = new Window();
dialog.Height = 450 * UserSettingsHelper.Instance.ControlSize;
dialog.Width = 400 * UserSettingsHelper.Instance.ControlSize;
dialog.Left = Math.Max(currentPosition.X, 20);
dialog.Top = Math.Max(currentPosition.Y, 20);
dialog.Content = new PropertyReferenceDialogControl();
PropertyReference newProperty = new PropertyReference();
newProperty.PropertyID = Guid.NewGuid();
newProperty.Solution = dragPropertyReferences.Solution;
newProperty.Entity = dragPropertyReferences.Entity;
PropertyReferenceViewModel newPropertyView = new PropertyReferenceViewModel(newProperty, dragPropertyReferences.Solution);
newPropertyView.ReferencedEntityID = diagramEntityView.EntityViewModel.EntityID;
newPropertyView.RefreshProperties();
dialog.DataContext = newPropertyView;
dialog.Title = newPropertyView.Title;
newPropertyView.RequestClose += new EventHandler(Item_RequestClose);
dialog.ShowDialog();
if (newPropertyView.IsOK == true)
{
dragPropertyReferences.AddPropertyReference(newPropertyView);
}
dialog.Close();
dialog = null;
e.Handled = true;
return;
}
// try drop as entity reference
EntityReferencesViewModel dragEntityReferences = e.Data.GetData(typeof(EntityReferencesViewModel)) as EntityReferencesViewModel;
if (dragEntityReferences != null)
{
dialog = new Window();
dialog.Height = 450 * UserSettingsHelper.Instance.ControlSize;
dialog.Width = 400 * UserSettingsHelper.Instance.ControlSize;
dialog.Left = Math.Max(currentPosition.X, 20);
dialog.Top = Math.Max(currentPosition.Y, 20);
dialog.Content = new EntityReferenceDialogControl();
EntityReference newProperty = new EntityReference();
newProperty.PropertyID = Guid.NewGuid();
newProperty.Solution = dragEntityReferences.Solution;
newProperty.Entity = dragEntityReferences.Entity;
newProperty.ReferencedEntity = diagramEntityView.DiagramEntity.Entity;
EntityReferenceViewModel newPropertyView = new EntityReferenceViewModel(newProperty, dragEntityReferences.Solution);
dialog.DataContext = newPropertyView;
dialog.Title = newPropertyView.Title;
newPropertyView.RequestClose += new EventHandler(Item_RequestClose);
dialog.ShowDialog();
if (newPropertyView.IsOK == true)
{
dragEntityReferences.AddEntityReference(newPropertyView);
}
dialog.Close();
dialog = null;
e.Handled = true;
return;
}
}
}
