/// <summary>
/// Delegate called to process every polygon in the map.
/// Called by <see cref="BuildLabels"/>.
/// </summary>
/// <param name="o">A polygon ring in the spatial index</param>
/// <returns>True (always), to force examination of the entire spatial index</returns>
bool FindLabelForPolygon(ISpatialObject o)
{
Debug.Assert(o is Ring);
if (o is Polygon)
{
// Only process polygons that don't already have a label, and which
// don't contain any islands (polygons with islands tend to cover
// much larget areas, so trying to find the label this way will
// probably not be very efficient).
Polygon p = (Polygon)o;
if (p.Label == null && !p.HasAnyIslands)
{
TextFeature label = new FindPolygonLabelQuery(m_Model.Index, p).Result;
if (label != null)
{
p.ClaimLabel(label);
label.SetBuilt(true);
}
}
}
return(true);
}
