public Edge(IInternalEdgePresenter presenter, object edgeObject, Node source, Node target, FrameworkElement endDecoration = null, FrameworkElement centerDecoration = null, FrameworkElement startDecoration = null)
{
Presenter = presenter;
EdgeObject = edgeObject;
Source = source;
Target = target;
StartDecoration = startDecoration;
EndDecoration = endDecoration;
CenterDecoration = centerDecoration;
#region Prepare grid
linkGridRotateTransform = new RotateTransform();
linkGrid = new Grid {
ColumnDefinitions = {
new ColumnDefinition { Width = new GridLength(1, GridUnitType.Auto) },
new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) },
new ColumnDefinition { Width = new GridLength(1, GridUnitType.Auto) },
new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) },
new ColumnDefinition { Width = new GridLength(1, GridUnitType.Auto) }
},
RenderTransformOrigin = new Point(0, 0.5d),
RenderTransform = linkGridRotateTransform
};
#endregion
#region Prepare link line
LinkInnerLine = new Line {
StrokeThickness = 1d,
Stroke = Brushes.Black,
};
linkLine = new Border {
Height = 20,
Background = Brushes.Transparent,
Child = LinkInnerLine
};
linkLine.Width = double.NaN;
linkLine.VerticalAlignment = VerticalAlignment.Center;
Grid.SetColumn(linkLine, 0);
Grid.SetColumnSpan(linkLine, 5);
linkGrid.Children.Add(linkLine);
#endregion
#region Prepare decorations
if (StartDecoration != null) {
StartDecoration.VerticalAlignment = VerticalAlignment.Center;
Grid.SetColumn(StartDecoration, 0);
linkGrid.Children.Add(StartDecoration);
}
if (CenterDecoration != null) {
CenterDecoration.VerticalAlignment = VerticalAlignment.Center;
Grid.SetColumn(CenterDecoration, 2);
linkGrid.Children.Add(CenterDecoration);
}
if (EndDecoration != null) {
EndDecoration.VerticalAlignment = VerticalAlignment.Center;
Grid.SetColumn(EndDecoration, 4);
linkGrid.Children.Add(EndDecoration);
}
#endregion
UILink = linkGrid;
Canvas.SetZIndex(UILink, Presenter.ZIndex);
}
private void UpdateDiagram()
{
#region Update nodes
var oldNodes = Nodes.ToArray();
Nodes.Clear();
foreach (var nodeObject in GraphPresenter.GetNodes()) {
Node node = oldNodes.FirstOrDefault(n => n.NodeObject == nodeObject);
if (node == null) {
var nodePresenter = GraphPresenter.CreateNodePresenter(nodeObject);
node = new Node(nodePresenter, this, nodeObject);
}
Nodes.Add(node);
}
#endregion
#region Update edges
var oldEdges = Edges.ToArray();
Edges.Clear();
foreach (var edgeObject in GraphPresenter.GetEdges()) {
Edge edge = oldEdges.FirstOrDefault(e => e.EdgeObject == edgeObject);
if (edge == null) {
var edgePresenter = GraphPresenter.CreateEdgePresenter(edgeObject);
Node sourceNode = GetNodeByObject(edgePresenter.Source);
Node targetNode = GetNodeByObject(edgePresenter.Target);
edge = new Edge(edgePresenter, edgeObject, sourceNode, targetNode, Edge.CreateEndArrow());
}
Edges.Add(edge);
}
#endregion
}