/// <summary>
/// Creates a new instance and installs it on the given <see cref="GraphControl"/>.
/// </summary>
/// <param name="graphControl">The control to install the z-order support on.</param>
public ZOrderSupport(GraphControl graphControl)
{
GraphControl = graphControl;
// make this ZOrderSupport available via lookup of the view graph and master graph
AddZOrderSupportLookup(graphControl.Graph, this);
FoldingView = graphControl.Graph.GetFoldingView();
MasterGraph = FoldingView.Manager.MasterGraph;
MasterGroupingSupport = MasterGraph.GetGroupingSupport();
AddZOrderSupportLookup(MasterGraph, this);
// use this ZOrderSupport as node comparer for the visualization
graphControl.GraphModelManager = new ZOrderGraphModelManager(graphControl, this);
// keep labels at their owners for this demo
graphControl.GraphModelManager.LabelLayerPolicy = LabelLayerPolicy.AtOwner;
// set a custom GraphMLIOHandler that supports writing and parsing node z-orders to/from GraphML
graphControl.GraphMLIOHandler = new ZOrderGraphMLIOHandler();
// use a custom edit mode to keep z-order consistent during grouping/folding/reparenting gestures
graphControl.InputMode = new ZOrderGraphEditorInputMode(this);
graphControl.Graph.GetDecorator().NodeDecorator.PositionHandlerDecorator.SetFactory(node => new ZOrderNodePositionHandler(node));
// use a custom clipboard that transfers the relative z-order of copied/cut nodes
graphControl.Clipboard = new ZOrderGraphClipboard(this);
// listen for new nodes to assign an initial z-order
MasterGraph.NodeCreated += OnNodeCreated;
AddZOrderForNewNodes = true;
}
public LayoutGraphPanel(LayoutGraph graph)
{
if (!GroupingSupport.IsFlat(graph))
{
grouping = new GroupingSupport(graph);
}
this.BackColor = Color.White;
this.BorderStyle = BorderStyle.Fixed3D;
this.AutoScroll = true;
global::yWorks.Algorithms.Geometry.Rectangle2D rect = LayoutGraphUtilities.GetBoundingBox(graph, graph.GetNodeCursor(), graph.GetEdgeCursor());
this.HScroll = true;
this.VScroll = true;
this.layoutGraph = graph;
this.edgePen = new Pen(Brushes.Black, 1);
this.nodeBorderPen = new Pen(Brushes.DarkGray, 1);
this.labelBorderPen = new Pen(Brushes.Red, 1);
this.nodeFillBrush = new SolidBrush(nodeFillColor);
this.labelBrush = Brushes.Black;
this.labelFont = new Font("sansserif", 6);
this.MouseDown += new MouseEventHandler(LayoutGraphPanel_MouseDown);
SetWorldRect(rect.X - insets, rect.Y - insets, rect.Width + insets * 2, rect.Height + insets * 2);
}
public GraphCanvas(LayoutGraph graph)
{
this.RenderTransform = new TranslateTransform(_padding, _padding);
var grouping = new GroupingSupport(graph);
// Add all edges
foreach (var edge in graph.Edges)
{
IEdgeLayout el = graph.GetLayout(edge);
var l = new Polyline();
l.Stroke = Brushes.Black;
l.Points.Add(new Point(graph.GetSourcePointAbs(edge).X, graph.GetSourcePointAbs(edge).Y));
for (int i = 0; i < el.PointCount(); i++)
{
Point p = new Point(el.GetPoint(i).X, el.GetPoint(i).Y);
l.Points.Add(p);
}
l.Points.Add(new Point(graph.GetTargetPointAbs(edge).X, graph.GetTargetPointAbs(edge).Y));
this.Children.Add(l);
// edge labels
var edgeLabelLayout = graph.GetLabelLayout(edge);
foreach (var labelLayout in edgeLabelLayout)
{
var orientedRectangle = labelLayout.LabelModel.GetLabelPlacement(
labelLayout.BoundingBox,
graph.GetLayout(edge),
graph.GetLayout(edge.Source),
graph.GetLayout(edge.Target),
labelLayout.ModelParameter);
this.Children.Add(GetPolygon(orientedRectangle));
}
}
// add all nodes
foreach (var node in graph.Nodes)
{
INodeLayout nl = graph.GetLayout(node);
Color color = grouping.IsGroupNode(node) ? Color.FromArgb(60, 255, 60, 0) : Color.FromArgb(255, 255, 255, 0);
var rect = new Rectangle();
this.Children.Add(rect);
rect.Stroke = new SolidColorBrush()
{
Color = Colors.Black
};
rect.Fill = new SolidColorBrush()
{
Color = color
};
rect.Width = nl.Width;
rect.Height = nl.Height;
Canvas.SetTop(rect, nl.Y);
Canvas.SetLeft(rect, nl.X);
// display the node index
var text = new TextBlock()
{
Text = String.Empty + node.Index,
HorizontalAlignment = HorizontalAlignment.Center,
VerticalAlignment = VerticalAlignment.Center
};
this.Children.Add(text);
text.Measure(new Size(Double.PositiveInfinity, Double.PositiveInfinity));
Canvas.SetTop(text, nl.Y + nl.Height / 2 - text.DesiredSize.Height / 2);
Canvas.SetLeft(text, nl.X + nl.Width / 2 - text.DesiredSize.Width / 2);
}
}
