/// <summary>
/// Returns possible parameters for the given label and model.
/// </summary>
/// <param name="label">The label for which to retrieve the parameters</param>
/// <param name="model"> must be <c>this</c> or at least of this type.</param>
public virtual IEnumerable <ILabelModelParameter> GetParameters(ILabel label, ILabelModel model)
{
RotatingEdgeLabelModel rotatingEdgeLabelModel = (RotatingEdgeLabelModel)model;
List <ILabelModelParameter> candidates = new List <ILabelModelParameter>();
for (int i = 0; i <= 10; i++)
{
candidates.Add(new RatioParameter(rotatingEdgeLabelModel, i * 0.1));
}
return(candidates);
}
public void SetGeometry(RotatingEdgeLabelModel model, ILabel label, IMutableOrientedRectangle rect)
{
IEdge edge = (IEdge)label.Owner;
double upX;
double upY;
double cx;
double cy;
if (edge != null && FindAnchorTangent(edge, out upX, out upY, out cx, out cy))
{
double newAngle = Math.Atan2(upX, -upY) + model.Angle;
double distance = model.Distance;
if (distance != 0)
{
double l = Math.Sqrt(upX * upX + upY * upY);
if (l > 0)
{
upX /= l;
upY /= l;
if (!model.EdgeRelativeDistance && upY > 0)
{
distance = -distance;
}
cx += upX * distance;
cy += upY * distance;
}
}
double sin = Math.Sin(newAngle);
double cos = -Math.Cos(newAngle);
rect.SetUpVector(sin, cos);
double w = label.PreferredSize.Width;
double h = label.PreferredSize.Height;
rect.Width = w;
rect.Height = h;
rect.SetCenter(new PointD(cx, cy));
}
else
{
rect.Width = -1;
rect.Height = -1;
}
}
public override object ProvideValue(IServiceProvider serviceProvider)
{
RotatingEdgeLabelModel exModel = (RotatingEdgeLabelModel)Model;
return(exModel.CreateRatio(Ratio));
}
public RatioParameter(RotatingEdgeLabelModel model, double r)
{
this.ratio = r;
this.model = model;
}