/// <summary>
/// Creates a new <c>Selection</c> that contains a single item (or nothing).
/// </summary>
/// <param name="so">The object to remember as part of this selection (if null, it
/// will not be added to the selection)</param>
/// <param name="searchPosition">A position associated with the selection (null
/// if a specific position isn't relevant). This is used to determine whether a
/// topological section is relevant when a line is selected.</param>
public Selection(ISpatialObject so, IPosition searchPosition)
{
m_Items = new List<ISpatialObject>(1);
if (so!=null)
m_Items.Add(so);
// If we're dealing with a single line that's been topologically sectioned,
// determine which divider we're closest to.
m_Section = null;
if (searchPosition != null)
{
LineFeature line = (so as LineFeature);
if (line != null && line.Topology is SectionTopologyList)
{
SectionTopologyList sections = (line.Topology as SectionTopologyList);
IDivider d = sections.FindClosestSection(searchPosition);
if (d != null)
m_Section = new DividerObject(d);
}
}
}
/// <summary>
/// Creates a new <c>Selection</c> that consists of the items in the supplied list.
/// </summary>
/// <param name="items">The items defining the content of the new selection</param>
internal Selection(IEnumerable<ISpatialObject> items)
{
m_Section = null;
m_Items = new List<ISpatialObject>(items);
}
/// <summary>
/// Creates a new <c>Selection</c> that refers to nothing.
/// </summary>
internal Selection()
{
m_Section = null;
m_Items = new List<ISpatialObject>();
}
