/// <summary>
/// Initializes a new instance of the <see cref="ArcGeometry"/> class
/// using the data read from persistent storage.
/// </summary>
/// <param name="editDeserializer">The mechanism for reading back content.</param>
internal ArcGeometry(EditDeserializer editDeserializer)
: base(editDeserializer)
{
m_IsClockwise = editDeserializer.ReadBool(DataField.Clockwise);
if (editDeserializer.IsNextField(DataField.Center))
{
PointFeature center = editDeserializer.ReadFeatureRef <PointFeature>(this, DataField.Center);
// The arc is the first arc attached to the circle. However, we cannot
// calculate the radius just yet because the bc/ec points are not persisted
// as part of the ArcGeometry definition (they are defined as part of the
// LineFeature object that utilizes the ArcGeometry).
// Even if we did have the bc/ec points at this stage, their positions will
// only be available if the data came from an import (they will still be
// undefined if the geometry is calculated, since calculation only occurs
// after deserialization has been completed).
if (center != null)
{
ApplyFeatureRef(DataField.Center, center);
}
}
else
{
ArcFeature firstArc = editDeserializer.ReadFeatureRef <ArcFeature>(this, DataField.FirstArc);
if (firstArc != null)
{
ApplyFeatureRef(DataField.FirstArc, firstArc);
}
}
}
/// <summary>
/// Reads data that was previously written using <see cref="WriteData"/>
/// </summary>
/// <param name="editDeserializer">The mechanism for reading back content.</param>
/// <param name="isTopological">Are we dealing with a polygon label</param>
/// <param name="polPos">The label reference point (usually applies onlt to polygon labels). Null if it's
/// identical to the position recorded via the geometry object.</param>
/// <param name="geom">The geometry for the text.</param>
static void ReadData(EditDeserializer editDeserializer, out bool isTopological, out PointGeometry polPos, out TextGeometry geom)
{
isTopological = editDeserializer.ReadBool(DataField.Topological);
if (editDeserializer.IsNextField(DataField.PolygonX))
{
polPos = editDeserializer.ReadPointGeometry(DataField.PolygonX, DataField.PolygonY);
}
else
{
polPos = null;
}
geom = editDeserializer.ReadPersistent <TextGeometry>(DataField.Type);
}
