protected override void OnMouseUp(MouseButtonEventArgs e)
{
if (HitConnectionNode != null)
{
ConnectionNode sourceConnectionNode = this.sourceConnectionNode;
ConnectionNode targetConnectionNode = this.HitConnectionNode;
Connection newConnection = new Connection(sourceConnectionNode, targetConnectionNode);
Canvas.SetZIndex(newConnection, DiagramCanvas.Children.Count);
this.DiagramCanvas.Children.Add(newConnection);
}
if (HitDiagramElement != null)
{
this.HitDiagramElement.IsDragConnectionOver = false;
}
if (this.IsMouseCaptured)
{
this.ReleaseMouseCapture();
}
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(this.DiagramCanvas);
if (adornerLayer != null)
{
adornerLayer.Remove(this);
}
}
public Connection(ConnectionNode source, ConnectionNode target)
{
this.ID = Guid.NewGuid();
this.Source = source;
this.Target = target;
base.Unloaded += new RoutedEventHandler(Connection_Unloaded);
}
private void HitTesting(Point hitPoint)
{
bool hitConnectionNodeFlag = false;
DependencyObject hitObject = DiagramCanvas.InputHitTest(hitPoint) as DependencyObject;
while (hitObject != null &&
hitObject != sourceConnectionNode.ParentDiagramElement &&
hitObject.GetType() != typeof(DiagramCanvas))
{
if (hitObject is ConnectionNode)
{
HitConnectionNode = hitObject as ConnectionNode;
hitConnectionNodeFlag = true;
}
if (hitObject is DiagramElement)
{
HitDiagramElement = hitObject as DiagramElement;
if (!hitConnectionNodeFlag)
{
HitConnectionNode = null;
}
return;
}
hitObject = VisualTreeHelper.GetParent(hitObject);
}
HitConnectionNode = null;
HitDiagramElement = null;
}
public ConnectionNodeAdorner(DiagramCanvas designer, ConnectionNode sourceConnectionNode)
: base(designer)
{
this.DiagramCanvas = designer;
this.sourceConnectionNode = sourceConnectionNode;
drawingPen = new Pen(Brushes.LightSlateGray, 1);
drawingPen.LineJoin = PenLineJoin.Round;
this.Cursor = Cursors.Cross;
}
void thumbDragControl_DragStarted(object sender, DragStartedEventArgs e)
{
this.HitDiagramElement = null;
this.HitConnectionNode = null;
this.pathGeometry = null;
this.Cursor = Cursors.Cross;
this.connection.StrokeDashArray = new DoubleCollection(new double[] { 1, 2 });
if (sender == sourceDragControl)
{
fixConnectionNode = connection.Target;
dragConnectionNode = connection.Source;
}
else if (sender == targetDragControl)
{
dragConnectionNode = connection.Target;
fixConnectionNode = connection.Source;
}
}
private void Open_Executed(object sender, ExecutedRoutedEventArgs e)
{
XElement root = LoadSerializedDataFromFile();
if (root == null)
{
return;
}
this.Children.Clear();
this.SelectionService.ClearSelection();
IEnumerable <XElement> itemsXML = root.Elements("DiagramElements").Elements("DiagramElement");
foreach (XElement itemXML in itemsXML)
{
Guid id = new Guid(itemXML.Element("ID").Value);
DiagramElement item = DeserializeDiagramElement(itemXML, id, 0, 0);
this.Children.Add(item);
SetConnectionNodeDecoratorTemplate(item);
}
this.InvalidateVisual();
IEnumerable <XElement> connectionsXML = root.Elements("Connections").Elements("Connection");
foreach (XElement connectionXML in connectionsXML)
{
Guid sourceID = new Guid(connectionXML.Element("SourceID").Value);
Guid targetID = new Guid(connectionXML.Element("TargetID").Value);
String sourceConnectionNodeName = connectionXML.Element("SourceConnectionNodeName").Value;
String targetConnectionNodeName = connectionXML.Element("TargetConnectionNodeName").Value;
ConnectionNode sourceConnectionNode = GetConnectionNode(sourceID, sourceConnectionNodeName);
ConnectionNode targetConnectionNode = GetConnectionNode(targetID, targetConnectionNodeName);
Connection connection = new Connection(sourceConnectionNode, targetConnectionNode);
Canvas.SetZIndex(connection, Int32.Parse(connectionXML.Element("zIndex").Value));
this.Children.Add(connection);
}
}
private void Paste_Executed(object sender, ExecutedRoutedEventArgs e)
{
XElement root = LoadSerializedDataFromClipBoard();
if (root == null)
{
return;
}
// create DiagramElements
Dictionary <Guid, Guid> mappingOldToNewIDs = new Dictionary <Guid, Guid>();
List <ISelectable> newItems = new List <ISelectable>();
IEnumerable <XElement> itemsXML = root.Elements("DiagramElements").Elements("DiagramElement");
double offsetX = Double.Parse(root.Attribute("OffsetX").Value, CultureInfo.InvariantCulture);
double offsetY = Double.Parse(root.Attribute("OffsetY").Value, CultureInfo.InvariantCulture);
foreach (XElement itemXML in itemsXML)
{
Guid oldID = new Guid(itemXML.Element("ID").Value);
Guid newID = Guid.NewGuid();
mappingOldToNewIDs.Add(oldID, newID);
DiagramElement item = DeserializeDiagramElement(itemXML, newID, offsetX, offsetY);
this.Children.Add(item);
SetConnectionNodeDecoratorTemplate(item);
newItems.Add(item);
}
// update group hierarchy
SelectionService.ClearSelection();
foreach (DiagramElement el in newItems)
{
if (el.ParentID != Guid.Empty)
{
el.ParentID = mappingOldToNewIDs[el.ParentID];
}
}
foreach (DiagramElement item in newItems)
{
if (item.ParentID == Guid.Empty)
{
SelectionService.AddToSelection(item);
}
}
// create Connections
IEnumerable <XElement> connectionsXML = root.Elements("Connections").Elements("Connection");
foreach (XElement connectionXML in connectionsXML)
{
Guid oldSourceID = new Guid(connectionXML.Element("SourceID").Value);
Guid oldTargetID = new Guid(connectionXML.Element("TargetID").Value);
if (mappingOldToNewIDs.ContainsKey(oldSourceID) && mappingOldToNewIDs.ContainsKey(oldTargetID))
{
Guid newSourceID = mappingOldToNewIDs[oldSourceID];
Guid newTargetID = mappingOldToNewIDs[oldTargetID];
String sourceConnectionNodeName = connectionXML.Element("SourceConnectionNodeName").Value;
String targetConnectionNodeName = connectionXML.Element("TargetConnectionNodeName").Value;
ConnectionNode sourceConnectionNode = GetConnectionNode(newSourceID, sourceConnectionNodeName);
ConnectionNode targetConnectionNode = GetConnectionNode(newTargetID, targetConnectionNodeName);
Connection connection = new Connection(sourceConnectionNode, targetConnectionNode);
Canvas.SetZIndex(connection, Int32.Parse(connectionXML.Element("zIndex").Value));
this.Children.Add(connection);
SelectionService.AddToSelection(connection);
}
}
// update paste offset
root.Attribute("OffsetX").Value = (offsetX + 10).ToString();
root.Attribute("OffsetY").Value = (offsetY + 10).ToString();
Clipboard.Clear();
Clipboard.SetData(DataFormats.Xaml, root);
}