/// <summary>
/// Adds a mapper with a <see cref="PreferredPlacementDescriptor"/> that matches the given settings to the mapper
/// registry of the given graph. In addition, sets the label model of all edge labels to free since that model
/// can realizes any label placement calculated by a layout algorithm.
/// </summary>
public LayoutData CreateLabelingLayoutData(
IGraph graph, EnumLabelPlacementAlongEdge placeAlongEdge, EnumLabelPlacementSideOfEdge sideOfEdge,
EnumLabelPlacementOrientation orientation, double distanceToEdge)
{
var descriptor = CreatePreferredPlacementDescriptor(
placeAlongEdge,
sideOfEdge,
orientation,
distanceToEdge
);
// change to a free edge label model to support integrated edge labeling
var model = new FreeEdgeLabelModel();
foreach (var label in graph.GetEdgeLabels())
{
if (!(label.LayoutParameter.Model is FreeEdgeLabelModel))
{
graph.SetLabelLayoutParameter(label, model.FindBestParameter(label, model, label.GetLayout()));
}
}
var layoutData = new GenericLayoutData();
layoutData.AddItemMapping(LayoutGraphAdapter.EdgeLabelLayoutPreferredPlacementDescriptorDpKey,
new ItemMapping <ILabel, PreferredPlacementDescriptor>(label => descriptor));
return(layoutData);
}
/// <summary>
/// Adds a mapper with a <see cref="PreferredPlacementDescriptor"/> that matches the given settings to the mapper
/// registry of the given graph. In addition, sets the label model of all edge labels to free since that model
/// can realizes any label placement calculated by a layout algorithm.
/// </summary>
public static void AddPreferredPlacementDescriptor(
IGraph graph, EnumLabelPlacementAlongEdge placeAlongEdge, EnumLabelPlacementSideOfEdge sideOfEdge,
EnumLabelPlacementOrientation orientation, double distanceToEdge)
{
var model = new FreeEdgeLabelModel();
var descriptor = CreatePreferredPlacementDescriptor(placeAlongEdge, sideOfEdge, orientation, distanceToEdge);
graph.MapperRegistry.CreateConstantMapper <ILabel, PreferredPlacementDescriptor>(
LayoutGraphAdapter.EdgeLabelLayoutPreferredPlacementDescriptorDpKey,
descriptor);
foreach (ILabel label in graph.GetEdgeLabels())
{
graph.SetLabelLayoutParameter(
label,
model.FindBestParameter(label, model, label.GetLayout()));
}
}
/// <summary>
/// Creates a new <see cref="PreferredPlacementDescriptor"/> that matches the given settings.
/// </summary>
public PreferredPlacementDescriptor CreatePreferredPlacementDescriptor(
EnumLabelPlacementAlongEdge placeAlongEdge, EnumLabelPlacementSideOfEdge sideOfEdge,
EnumLabelPlacementOrientation orientation, double distanceToEdge)
{
var descriptor = new PreferredPlacementDescriptor();
switch (sideOfEdge)
{
case EnumLabelPlacementSideOfEdge.Anywhere:
descriptor.SideOfEdge = LabelPlacements.Anywhere;
break;
case EnumLabelPlacementSideOfEdge.OnEdge:
descriptor.SideOfEdge = LabelPlacements.OnEdge;
break;
case EnumLabelPlacementSideOfEdge.Left:
descriptor.SideOfEdge = LabelPlacements.LeftOfEdge;
break;
case EnumLabelPlacementSideOfEdge.Right:
descriptor.SideOfEdge = LabelPlacements.RightOfEdge;
break;
case EnumLabelPlacementSideOfEdge.LeftOrRight:
descriptor.SideOfEdge = LabelPlacements.LeftOfEdge | LabelPlacements.RightOfEdge;
break;
}
switch (placeAlongEdge)
{
case EnumLabelPlacementAlongEdge.Anywhere:
descriptor.PlaceAlongEdge = LabelPlacements.Anywhere;
break;
case EnumLabelPlacementAlongEdge.AtSourcePort:
descriptor.PlaceAlongEdge = LabelPlacements.AtSourcePort;
break;
case EnumLabelPlacementAlongEdge.AtTargetPort:
descriptor.PlaceAlongEdge = LabelPlacements.AtTargetPort;
break;
case EnumLabelPlacementAlongEdge.AtSource:
descriptor.PlaceAlongEdge = LabelPlacements.AtSource;
break;
case EnumLabelPlacementAlongEdge.AtTarget:
descriptor.PlaceAlongEdge = LabelPlacements.AtTarget;
break;
case EnumLabelPlacementAlongEdge.Centered:
descriptor.PlaceAlongEdge = LabelPlacements.AtCenter;
break;
}
switch (orientation)
{
case EnumLabelPlacementOrientation.Parallel:
descriptor.Angle = 0.0d;
descriptor.AngleReference = LabelAngleReferences.RelativeToEdgeFlow;
break;
case EnumLabelPlacementOrientation.Orthogonal:
descriptor.Angle = Math.PI / 2;
descriptor.AngleReference = LabelAngleReferences.RelativeToEdgeFlow;
break;
case EnumLabelPlacementOrientation.Horizontal:
descriptor.Angle = 0.0d;
descriptor.AngleReference = LabelAngleReferences.Absolute;
break;
case EnumLabelPlacementOrientation.Vertical:
descriptor.Angle = Math.PI / 2;
descriptor.AngleReference = LabelAngleReferences.Absolute;
break;
}
descriptor.DistanceToEdge = distanceToEdge;
return(descriptor);
}
