/// <summary>
/// Initializes the styles to use for the graph.
/// </summary>
private void InitializeStyles()
{
defaultNodeStyle = new ShinyPlateNodeStyle {
Brush = Brushes.DarkOrange
};
sourceNodeStyle = new ShinyPlateNodeStyle {
Brush = Brushes.LimeGreen
};
targetNodeStyle = new ShinyPlateNodeStyle {
Brush = Brushes.OrangeRed
};
sourceAndTargetNodeStyle = new ShinyPlateNodeStyle
{
Brush = new LinearGradientBrush
{
GradientStops = new GradientStopCollection
{
new GradientStop {
Color = Colors.Green, Offset = 0.49
},
new GradientStop {
Color = Colors.Red, Offset = 0.51
}
},
SpreadMethod = GradientSpreadMethod.Pad,
}
};
defaultEdgeStyle = new PolylineEdgeStyle {
TargetArrow = directed ? Arrows.Default : Arrows.None
};
pathEdgeStyle = new PolylineEdgeStyle {
Pen = new Pen(Brushes.Red, 4.0f), TargetArrow = directed ? Arrows.Default : Arrows.None
};
}
/// <summary>
/// Sets up default styles for graph elements.
/// </summary>
/// <remarks>
/// Default styles apply only to elements created after the default style has been set,
/// so typically, you'd set these as early as possible in your application.
/// </remarks>
private void SetDefaultStyles()
{
///////////////// New in this Sample /////////////////
#region Default Node Style
// Sets the default style for nodes
// Creates a nice ShinyPlateNodeStyle instance, using an orange Brush.
INodeStyle defaultNodeStyle = new ShinyPlateNodeStyle {
Brush = new SolidBrush(Color.FromArgb(255, 255, 140, 0))
};
// Sets this style as the default for all nodes that don't have another
// style assigned explicitly
Graph.NodeDefaults.Style = defaultNodeStyle;
#endregion
#region Default Edge Style
// Sets the default style for edges:
// Creates an edge style that will apply a gray pen with thickness 1
// to the entire line using PolyLineEdgeStyle,
// which draws a polyline determined by the edge's control points (bends)
var defaultEdgeStyle = new PolylineEdgeStyle {
Pen = Pens.Gray
};
// Sets the source and target arrows on the edge style instance
// (Actually: no source arrow)
// Note that IEdgeStyle itself does not have these properties
// Also note that by default there are no arrows
defaultEdgeStyle.TargetArrow = Arrows.Default;
// Sets the defined edge style as the default for all edges that don't have
// another style assigned explicitly:
Graph.EdgeDefaults.Style = defaultEdgeStyle;
#endregion
#region Default Label Styles
// Sets the default style for labels
// Creates a label style with the label text color set to dark red
ILabelStyle defaultLabelStyle = new DefaultLabelStyle {
Font = new Font("Tahoma", 12), TextBrush = Brushes.DarkRed
};
// Sets the defined style as the default for both edge and node labels:
Graph.EdgeDefaults.Labels.Style = Graph.NodeDefaults.Labels.Style = defaultLabelStyle;
#endregion
#region Default Node size
// Sets the default size explicitly to 40x40
Graph.NodeDefaults.Size = new SizeD(40, 40);
#endregion
///////////////////////////////////////////////////
}
/// <summary>
/// Creates and configures the graph that is used for the placer configuration preview.
/// </summary>
private void SetupPreview()
{
IGraph graph = previewControl.Graph;
DictionaryMapper <INode, bool> assistantMap =
graph.MapperRegistry.CreateMapper <INode, bool>(AssistantNodePlacer.AssistantNodeDpKey);
graph.NodeDefaults.Size = new SizeD(40, 30);
graph.NodeDefaults.Style = new ShinyPlateNodeStyle
{
Brush = Brushes.LightGray,
Insets = new InsetsD(5),
DrawShadow = false,
Pen = Pens.Black
};
var rootStyle = new ShinyPlateNodeStyle
{
Brush = Brushes.Red,
Insets = new InsetsD(5),
Pen = Pens.Black,
DrawShadow = false
};
var assistantStyle = new ShinyPlateNodeStyle
{
Brush = Brushes.LightGray,
Insets = new InsetsD(5),
Pen = new Pen(Brushes.Black, 1)
{
DashStyle = DashStyles.Dash
},
DrawShadow = false
};
INode root = graph.CreateNode();
graph.SetStyle(root, rootStyle);
INode n1 = graph.CreateNode();
graph.SetStyle(n1, assistantStyle);
assistantMap[n1] = true;
INode n2 = graph.CreateNode();
INode n3 = graph.CreateNode();
INode n4 = graph.CreateNode();
INode n5 = graph.CreateNode(new RectD(0, 0, 60, 30));
graph.CreateEdge(root, n1);
graph.CreateEdge(root, n2);
graph.CreateEdge(root, n3);
graph.CreateEdge(root, n4);
graph.CreateEdge(root, n5);
previewLayout = new TreeLayout();
}
///<summary>
/// Create a sample graph: a simple tree with SimpleNodePlacers assigned to each node.
/// This implementation creates three layers with three children each.
///</summary>
private void CreateSampleGraph(IGraph graph)
{
graph.Clear();
INode root = graph.CreateNode();
var style = new ShinyPlateNodeStyle {
Brush = NodePlacerPanel.LayerBrushes[0]
};
graph.SetStyle(root, style);
var placer = new DefaultNodePlacer
{
ChildPlacement = ChildPlacement.VerticalToRight
};
placers[root] = placer;
CreateSubTree(graph, root, 1, 2);
}
/// <summary>
/// Initializes the styles to use for the graph.
/// </summary>
private void InitializeStyles()
{
defaultNodeStyle = new ShinyPlateNodeStyle {
Brush = Brushes.DarkOrange
};
sourceNodeStyle = new ShinyPlateNodeStyle {
Brush = Brushes.LimeGreen
};
targetNodeStyle = new ShinyPlateNodeStyle {
Brush = Brushes.OrangeRed
};
sourceAndTargetNodeStyle = new ShinyPlateNodeStyle {
Brush = new HatchBrush(HatchStyle.LargeCheckerBoard, Color.LimeGreen, Color.OrangeRed)
};
defaultEdgeStyle = new PolylineEdgeStyle {
Pen = Pens.Black, TargetArrow = directed ? Arrows.Default : Arrows.None
};
pathEdgeStyle = new PolylineEdgeStyle {
Pen = new Pen(Color.Red, 4.0f), TargetArrow = directed ? Arrows.Default : Arrows.None
};
}
/// <summary>
/// Creates the sample graph of the given color with two nodes and a single edge.
/// </summary>
private static IEdge CreateSubgraph(IGraph graph, Color color, double yOffset, bool createPorts)
{
var brush = new SolidColorBrush(color);
// Create two nodes
var nodeStyle = new ShinyPlateNodeStyle {
Brush = brush
};
var n1 = graph.CreateNode(new RectD(110, 100 + yOffset, 40, 40), nodeStyle, color);
var n2 = graph.CreateNode(new RectD(450, 130 + yOffset, 40, 40), nodeStyle, color);
// Create an edge, either between the two nodes or between the nodes's ports
IEdge edge;
if (!createPorts)
{
edge = graph.CreateEdge(n1, n2, new PolylineEdgeStyle {
Pen = new Pen(brush, 1)
}, color);
}
else
{
var p1 = CreateSamplePorts(graph, n1, true);
var p2 = CreateSamplePorts(graph, n2, false);
edge = graph.CreateEdge(p1[1], p2[2], new PolylineEdgeStyle {
Pen = new Pen(brush, 1)
}, color);
}
// Add bends that create a veredge.SourcePort.Locationtical segment in the middle of the edge
var sourcePortLocation = edge.SourcePort.GetLocation();
var targetPortLocation = edge.TargetPort.GetLocation();
var x = (sourcePortLocation.X + targetPortLocation.X) / 2;
graph.AddBend(edge, new PointD(x, sourcePortLocation.Y));
graph.AddBend(edge, new PointD(x, targetPortLocation.Y));
return(edge);
}
