/// <summary>
/// Builds the properties for the labels's <see cref="ILabelModel"/> type.
/// </summary>
protected virtual void BuildModelProperties(IPropertyBuildContext <ILabel> context)
{
ValueGetterDelegate <Type> labelModelGetter = new ValueGetterDelegate <Type>(
delegate {
var type = context.CurrentInstance.LayoutParameter.Model.GetType();
while (!type.IsPublic)
{
type = type.BaseType;
}
return(type);
});
ValueSetterDelegate <Type> labelModelSetter = new ValueSetterDelegate <Type>(
delegate(Type value) {
IGraph graph = context.Lookup(typeof(IGraph)) as IGraph;
if (graph != null)
{
ILabelModel model = Activator.CreateInstance(value) as ILabelModel;
if (model != null)
{
ILabelModelParameterFinder finder =
model.Lookup(typeof(ILabelModelParameterFinder)) as ILabelModelParameterFinder;
ILabelModelParameter parameter;
ILabel subject = context.CurrentInstance;
if (finder != null)
{
parameter = finder.FindBestParameter(subject, model, subject.GetLayout());
}
else
{
parameter = model.CreateDefaultParameter();
}
graph.SetLabelLayoutParameter(subject, parameter);
}
}
});
ILabel currentLabel;
currentLabel = context.CurrentInstance;
if (currentLabel == null)
{
return;
}
if (currentLabel.Owner is IEdge)
{
context.AddEntry(EdgeLabelModelProperty,
labelModelGetter,
labelModelSetter, null);
}
if (currentLabel.Owner is INode)
{
context.AddEntry(NodeLabelModelProperty, labelModelGetter, labelModelSetter, null);
}
if (currentLabel.Owner is IPort)
{
context.AddEntry(PortLabelModelProperty, labelModelGetter, labelModelSetter, null);
}
}
/// <summary>
/// Finds the label model parameter that describes the given label layout best.
/// </summary>
/// <remarks>
/// Sometimes the layout cannot be met exactly, then the nearest location is used.
/// </remarks>
public ILabelModelParameter FindBestParameter(ILabel label, ILabelModel model, IOrientedRectangle labelLayout)
{
var wrapperModel = model as RotatableNodeLabelModelDecorator;
var styleWrapper = wrapperModel.GetNodeStyleWrapper(label);
if (!wrapperModel.UseNodeRotation || styleWrapper == null || styleWrapper.Angle == 0)
{
return
(wrapperModel.CreateWrappingParameter(wrappedFinder.FindBestParameter(label, wrapperModel.Wrapped,
labelLayout)));
}
var node = label.Owner as INode;
var rotatedCenter = styleWrapper.GetRotatedPoint(labelLayout.GetCenter(), node, false);
var rotatedLayout = styleWrapper.GetRotatedLayout(node);
var rectangle = new OrientedRectangle(labelLayout);
rectangle.Angle -= rotatedLayout.GetRadians();
rectangle.SetCenter(rotatedCenter);
return
(wrapperModel.CreateWrappingParameter(wrappedFinder.FindBestParameter(label, wrapperModel.Wrapped, rectangle)));
}