private void CreateSampleGraph()
{
INodeStyle nodeStyle = new ShapeNodeStyle
{
Shape = ShapeNodeShape.RoundRectangle,
Pen = new Pen(new SolidColorBrush(Color.FromArgb(0xFF, 0x24, 0x9A, 0xE7)), 1),
Brush = new LinearGradientBrush(Color.FromArgb(0xFF, 0xCC, 0xFF, 0xFF), Color.FromArgb(0xFF, 0x24, 0x9A, 0xE7), 90.0)
};
var node1 = CreateNode(new PointD(0, 0), new NodeStyleDecorator(nodeStyle, "Resources/internet.png"), "Root");
var node2 = CreateNode(new PointD(120, -50), new NodeStyleDecorator(nodeStyle, "Resources/switch.png"), "Switch");
var node3 = CreateNode(new PointD(-130, 60), new NodeStyleDecorator(nodeStyle, "Resources/switch.png"), "Switch");
var node4 = CreateNode(new PointD(95, -180), new NodeStyleDecorator(nodeStyle, "Resources/scanner.png"), "Scanner");
var node5 = CreateNode(new PointD(240, -110), new NodeStyleDecorator(nodeStyle, "Resources/printer.png"), "Printer");
var node6 = CreateNode(new PointD(200, 50), new NodeStyleDecorator(nodeStyle, "Resources/computer.png"), "Workstation");
var node7 = CreateNode(new PointD(-160, -60), new NodeStyleDecorator(nodeStyle, "Resources/printer.png"), "Printer");
var node8 = CreateNode(new PointD(-260, 40), new NodeStyleDecorator(nodeStyle, "Resources/scanner.png"), "Scanner");
var node9 = CreateNode(new PointD(-200, 170), new NodeStyleDecorator(nodeStyle, "Resources/computer.png"), "Workstation");
var node10 = CreateNode(new PointD(-50, 160), new NodeStyleDecorator(nodeStyle, "Resources/computer.png"), "Workstation");
Graph.CreateEdge(node1, node2, Graph.EdgeDefaults.Style, TrafficLoad.VeryHigh);
Graph.CreateEdge(node1, node3, Graph.EdgeDefaults.Style, TrafficLoad.High);
Graph.CreateEdge(node2, node4, Graph.EdgeDefaults.Style, TrafficLoad.High);
Graph.CreateEdge(node2, node5, Graph.EdgeDefaults.Style, TrafficLoad.Normal);
Graph.CreateEdge(node2, node6, Graph.EdgeDefaults.Style, TrafficLoad.High);
Graph.CreateEdge(node3, node7, Graph.EdgeDefaults.Style, TrafficLoad.Low);
Graph.CreateEdge(node3, node8, Graph.EdgeDefaults.Style, TrafficLoad.Low);
Graph.CreateEdge(node3, node9, Graph.EdgeDefaults.Style, TrafficLoad.Normal);
Graph.CreateEdge(node3, node10, Graph.EdgeDefaults.Style, TrafficLoad.Low);
}
public FlowChartNodeStyle()
{
NodeStyle = new ShapeNodeStyle
{
Brush = new LinearGradientBrush(new PointF(0, 0), new PointF(1, 1), Color.FromArgb(255, 221, 136), Color.FromArgb(255, 153, 0)),
Pen = new Pen(new SolidBrush(Color.FromArgb(255, 153, 0)))
};
PortStyle = new CirclePortStyle();
}
private void OnWindowLoaded(object sender, RoutedEventArgs e)
{
IGraph graph = graphControl.Graph;
// initialize graph defaults
var adaptedStyle = new ShapeNodeStyle {
Brush = Brushes.Green, Pen = Pens.Transparent
};
graph.NodeDefaults.Ports.Style = new NodeStylePortStyleAdapter(adaptedStyle)
{
RenderSize = new SizeD(7, 7)
};
// each port needs its own style instance to have its own render size
graph.NodeDefaults.Ports.ShareStyleInstance = false;
// disable removing ports when all attached edges have been removed
graph.NodeDefaults.Ports.AutoCleanUp = false;
graph.EdgeDefaults.Style = new PolylineEdgeStyle {
Pen = new Pen(Brushes.Black, 3)
};
// create a default editor input mode
GraphEditorInputMode geim = new GraphEditorInputMode();
// ports are preferred for clicks
geim.ClickHitTestOrder = new [] {
GraphItemTypes.Port,
GraphItemTypes.PortLabel,
GraphItemTypes.Bend,
GraphItemTypes.EdgeLabel,
GraphItemTypes.Edge,
GraphItemTypes.Node,
GraphItemTypes.NodeLabel,
};
// enable orthogonal edge editing
geim.OrthogonalEdgeEditingContext = new OrthogonalEdgeEditingContext();
// PortReshapeHandlerProvider considers pressed Ctrl keys. Whenever Ctrl is pressed or released,
// we force GraphEditorInputMode to requery the handles of selected items
graphControl.KeyDown += UpdateHandles;
graphControl.KeyUp += UpdateHandles;
// finally, set the input mode to the graph control.
graphControl.InputMode = geim;
// register the reshape handle provider for ports
RegisterReshapeHandleProvider();
// read initial graph from embedded resource
graphControl.ImportFromGraphML("Resources\\defaultGraph.graphml");
}
private void InitializeHighlightStyles()
{
// we want to create a non-default nice highlight styling
// for the hover highlight, create semi transparent orange stroke first
var orangeRed = Colors.OrangeRed;
var orangePen = new Pen(new SolidColorBrush(Color.FromArgb(220, orangeRed.R, orangeRed.G, orangeRed.B)), 3);
// freeze it for slightly improved performance
orangePen.Freeze();
// now decorate the nodes and edges with custom hover highlight styles
var decorator = graphControl.Graph.GetDecorator();
// nodes should be given a rectangular orange rectangle highlight shape
var highlightShape = new ShapeNodeStyle {
Shape = ShapeNodeShape.RoundRectangle,
Pen = orangePen,
Brush = null
};
var nodeStyleHighlight = new NodeStyleDecorationInstaller {
NodeStyle = highlightShape,
// that should be slightly larger than the real node
Margins = new InsetsD(5),
// but have a fixed size in the view coordinates
ZoomPolicy = StyleDecorationZoomPolicy.ViewCoordinates
};
// register it as the default implementation for all nodes
decorator.NodeDecorator.HighlightDecorator.SetImplementation(nodeStyleHighlight);
// a similar style for the edges, however cropped by the highlight's insets
var dummyCroppingArrow = new Arrow {
Type = ArrowType.None,
CropLength = 5
};
var edgeStyle = new PolylineEdgeStyle {
Pen = orangePen,
TargetArrow = dummyCroppingArrow,
SourceArrow = dummyCroppingArrow
};
var edgeStyleHighlight = new EdgeStyleDecorationInstaller {
EdgeStyle = edgeStyle,
ZoomPolicy = StyleDecorationZoomPolicy.ViewCoordinates
};
decorator.EdgeDecorator.HighlightDecorator.SetImplementation(edgeStyleHighlight);
}
public FlowChartNodeStyle()
{
NodeStyle = new ShapeNodeStyle()
{
Brush = new LinearGradientBrush
{
StartPoint = new PointD(0, 0),
EndPoint = new PointD(1, 1),
GradientStops = new GradientStopCollection
{
new GradientStop(Color.FromRgb(255, 221, 136), 0.3),
new GradientStop(Color.FromRgb(255, 153, 0), 0.6)
}
},
Pen = new Pen(new SolidColorBrush(Color.FromRgb(255, 153, 0)), 1),
};
PortStyle = new CirclePortStyle();
}
/// <summary>
/// Creates a sample graph and introduces all important graph elements present in
/// yFiles.NET. Additionally, this method now overrides the label placement for some specific labels.
/// </summary>
private void PopulateGraph()
{
#region Sample Graph creation
//////////// Sample node creation ///////////////////
// Creates two nodes with the default node size
// The location is specified for the _center_
INode node1 = Graph.CreateNode(new PointD(50, 50));
INode node2 = Graph.CreateNode(new PointD(150, 50));
// Creates a third node with a different size of 80x40
// In this case, the location of (360,380) describes the _upper left_
// corner of the node bounds
INode node3 = Graph.CreateNode(new RectD(360, 380, 80, 40));
/////////////////////////////////////////////////////
//////////// Sample edge creation ///////////////////
// Creates some edges between the nodes
IEdge edge1 = Graph.CreateEdge(node1, node2);
IEdge edge2 = Graph.CreateEdge(node2, node3);
/////////////////////////////////////////////////////
//////////// Using Bends ////////////////////////////
// Creates the first bend for edge2 at (400, 50)
IBend bend1 = Graph.AddBend(edge2, new PointD(400, 50));
/////////////////////////////////////////////////////
//////////// Using Ports ////////////////////////////
// Actually, edges connect "ports", not nodes directly.
// If necessary, you can manually create ports at nodes
// and let the edges connect to these.
// Creates a port in the center of the node layout
IPort port1AtNode1 = Graph.AddPort(node1, FreeNodePortLocationModel.NodeCenterAnchored);
// Creates a port at the middle of the left border
// Note to use absolute locations when placing ports using PointD.
IPort port1AtNode3 = Graph.AddPort(node3, new PointD(node3.Layout.X, node3.Layout.GetCenter().Y));
// Creates an edge that connects these specific ports
IEdge edgeAtPorts = Graph.CreateEdge(port1AtNode1, port1AtNode3);
/////////////////////////////////////////////////////
//////////// Sample label creation ///////////////////
// Adds labels to several graph elements
Graph.AddLabel(node1, "N 1");
Graph.AddLabel(node2, "N 2");
Graph.AddLabel(node3, "N 3");
var edgeLabel = Graph.AddLabel(edgeAtPorts, "Edge at Ports");
/////////////////////////////////////////////////////
/////////////////////////////////////////////////////
#endregion
///////////////// New in this Sample /////////////////
// Override default styles
// Changes the style for the second node
// Creates a new node style, this time a ShapeNodeStyle:
ShapeNodeStyle sns = new ShapeNodeStyle {
Shape = ShapeNodeShape.Ellipse, Pen = Pens.Black, Brush = Brushes.OrangeRed
};
// Sets the node's style property to the new style through its owning graph,
// since you can't set the style property of an INode directly
// (you'll set most other graph object properties this way as well)
Graph.SetStyle(node2, sns);
// Creates a different style for the label with black text and a red border
// and intransparent white background
DefaultLabelStyle sls = new DefaultLabelStyle {
Font = new Font("Arial Black", 12), TextBrush = Brushes.Black
};
sls.BackgroundPen = Pens.Red;
sls.BackgroundBrush = Brushes.White;
// And sets the style for the edge label, again through its owning graph.
Graph.SetStyle(edgeLabel, sls);
// Override the style for the "Edge at Ports" edge:
// Uses a dashed red Pen with thickness 2.
Pen defaultPen = new Pen(Brushes.Red, 2)
{
DashStyle = DashStyle.Dash
};
// Creates an edge style that will apply the new default pen
// to the entire line using PolyLineEdgeStyle,
// which draws a polyline determined by the edge's control points (bends)
var edgeStyle = new PolylineEdgeStyle {
Pen = defaultPen
};
// Sets the source and target arrows on the edge style instance
// Note that IEdgeStyle itself does not have these properties
// also note: by default the arrows have a default brush and pen
edgeStyle.SourceArrow = Arrows.Circle;
// set color and size to match the thick red line
edgeStyle.TargetArrow = new Arrow(Color.Red)
{
Type = ArrowType.Short, Scale = 2
};
// Sets the style for the "Edge at Ports" edge, again through its owning graph.
Graph.SetStyle(edge2, edgeStyle);
//////////////////////////////////////////////////////
}
