/// <summary>
/// For the given parameter, calculate the actual geometry of the specified label in absolute world coordinates.
/// </summary>
/// <remarks>The actual position is calculated from the <see cref="MyNodeLabelModelParameter.Ratio"/> specified in the parameter as
/// the counterclock-wise angle on the label owner's circumference. Note that we also rotate the label layout itself accordingly.</remarks>
public IOrientedRectangle GetGeometry(ILabel label, ILabelModelParameter parameter)
{
var modelParameter = parameter as MyNodeLabelModelParameter;
var ownerNode = label.Owner as INode;
if (modelParameter != null && ownerNode != null)
{
//If we have a matching parameter and a node as owner, calculate the angle for the label position and the matchin rotation of the label layout box itself.
var center = ownerNode.Layout.GetCenter();
var radius = Math.Max(ownerNode.Layout.Width, ownerNode.Layout.Height) * 0.5d;
var ratio = modelParameter.Ratio;
double angle = ratio * Math.PI * 2;
double x = Math.Sin(angle);
double y = Math.Cos(angle);
PointD up = new PointD(-y, x);
OrientedRectangle result = new OrientedRectangle();
result.SetUpVector(up);
result.Resize(label.PreferredSize);
result.SetCenter(center + (offset + radius + label.PreferredSize.Height * 0.5d) * up);
return(result);
}
else
{
return(OrientedRectangle.Empty);
}
}
public IOrientedRectangle GetGeometry(ILabel label, ILabelModelParameter parameter)
{
var php = parameter as PoolHeaderParameter;
INode owner = (INode)label.Owner;
if (php == null || owner == null)
{
return(null);
}
ITable table = owner.Lookup <ITable>();
InsetsD insets = table != null && table.Insets != InsetsD.Empty ? table.Insets : new InsetsD(0);
var orientedRectangle = new OrientedRectangle();
orientedRectangle.Resize(label.PreferredSize);
switch (php.Side)
{
case 0: // North
orientedRectangle.SetUpVector(0, -1);
orientedRectangle.SetCenter(new PointD(owner.Layout.X + owner.Layout.Width / 2, owner.Layout.Y + insets.Top / 2));
break;
case 1: // East
orientedRectangle.SetUpVector(1, 0);
orientedRectangle.SetCenter(new PointD(owner.Layout.GetMaxX() - insets.Right / 2, owner.Layout.Y + owner.Layout.Height / 2));
break;
case 2: // South
orientedRectangle.SetUpVector(0, -1);
orientedRectangle.SetCenter(new PointD(owner.Layout.X + owner.Layout.Width / 2, owner.Layout.GetMaxY() - insets.Bottom / 2));
break;
case 3: // West
default:
orientedRectangle.SetUpVector(-1, 0);
orientedRectangle.SetCenter(new PointD(owner.Layout.X + insets.Left / 2, owner.Layout.Y + owner.Layout.Height / 2));
break;
}
return(orientedRectangle);
}