/// <summary>
/// Creates a default enumerator for a given stroke
/// If using the strokes drawing attributes, pass stroke.DrawingAttributes for the second
/// argument. If using an overridden DA, use that instance.
/// </summary>
internal static StrokeNodeIterator GetIterator(StylusPointCollection stylusPoints, DrawingAttributes drawingAttributes)
{
if (stylusPoints == null)
{
throw new System.ArgumentNullException("stylusPoints");
}
if (drawingAttributes == null)
{
throw new System.ArgumentNullException("drawingAttributes");
}
StrokeNodeOperations operations =
StrokeNodeOperations.CreateInstance(drawingAttributes.StylusShape);
bool usePressure = !drawingAttributes.IgnorePressure;
return(new StrokeNodeIterator(stylusPoints, operations, usePressure));
}
/// <summary>
/// Constructor for an incremental node enumerator that builds nodes
/// from array(s) of points and a given stylus shape.
/// </summary>
/// <param name="nodeShape">a shape that defines the stroke contour</param>
internal StrokeNodeIterator(StylusShape nodeShape)
: this(null, //stylusPoints
StrokeNodeOperations.CreateInstance(nodeShape),
false) //usePressure)
{
}
/// <summary>
/// Constructor for an incremental node enumerator that builds nodes
/// from StylusPointCollections
/// called by the IncrementalRenderer
/// </summary>
/// <param name="drawingAttributes">drawing attributes</param>
internal StrokeNodeIterator(DrawingAttributes drawingAttributes)
: this(null, //stylusPoints
StrokeNodeOperations.CreateInstance((drawingAttributes == null ? null : drawingAttributes.StylusShape)),
(drawingAttributes == null ? false : !drawingAttributes.IgnorePressure)) //usePressure
{
}