private void InitializeDecoration()
{
nodeDecorationInstaller = new NodeStyleDecorationInstaller
{
NodeStyle = new ShapeNodeStyle {
Shape = ShapeNodeShape.Rectangle, Pen = Pens.DeepSkyBlue, Brush = Brushes.Transparent
},
Margins = new InsetsD(10.0)
};
edgeDecorationInstaller = new EdgeStyleDecorationInstaller
{
EdgeStyle = new PolylineEdgeStyle {
Pen = new Pen(Brushes.DeepSkyBlue, 3)
}
};
labelDecorationInstaller = new LabelStyleDecorationInstaller
{
LabelStyle = new NodeStyleLabelStyleAdapter(
new ShapeNodeStyle {
Shape = ShapeNodeShape.RoundRectangle, Pen = Pens.DeepSkyBlue, Brush = Brushes.Transparent
},
VoidLabelStyle.Instance),
Margins = new InsetsD(5.0)
};
styleDecorationZoomPolicies = new[]
{
StyleDecorationZoomPolicy.Mixed,
StyleDecorationZoomPolicy.WorldCoordinates,
StyleDecorationZoomPolicy.ViewCoordinates
};
zoomModeComboBox.ComboBox.DataSource = styleDecorationZoomPolicies;
zoomModeComboBox.SelectedIndex = 0;
}
private void InitializeGraph()
{
var graph = graphControl.Graph;
// Enable undo support
graph.SetUndoEngineEnabled(true);
// set some nice defaults
// use a node style renderer which highlights the node based on its tag.
graph.NodeDefaults.Style = new ShapeNodeStyle(new AnalysisShapeNodeStyleRenderer())
{
Shape = ShapeNodeShape.Ellipse
};
// use an ede style renderer which highlights the edge based on its tag.
graph.EdgeDefaults.Style = new PolylineEdgeStyle(new AnalysisPolylineEdgeStyleRenderer());
// use a special decorator for selection
var selectionInstaller = new NodeStyleDecorationInstaller {
NodeStyle = new ShapeNodeStyle
{
Shape = ShapeNodeShape.Ellipse, Pen = (Pen) new Pen(Brushes.Gray, 5).GetAsFrozen(), Brush = null
}
};
// use a special decorator for focus
var focusIndicatorInstaller = new NodeStyleDecorationInstaller {
NodeStyle = new ShapeNodeStyle {
Shape = ShapeNodeShape.Ellipse,
Pen = (Pen) new Pen(Brushes.LightGray, 3)
{
DashStyle = DashStyles.Dash
}.GetAsFrozen(),
Brush = null
}
};
var decorator = graph.GetDecorator();
decorator.NodeDecorator.SelectionDecorator.SetImplementation(selectionInstaller);
decorator.NodeDecorator.FocusIndicatorDecorator.SetImplementation(focusIndicatorInstaller);
graph.EdgeDefaults.Labels.LayoutParameter = FreeEdgeLabelModel.Instance.CreateDefaultParameter();
graph.EdgeDefaults.Labels.Style = new DefaultLabelStyle {
TextSize = 10,
BackgroundBrush = Brushes.AliceBlue,
BackgroundPen = (Pen) new Pen(Brushes.LightSkyBlue, 2).GetAsFrozen(),
AutoFlip = false
};
}
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);
}
