/// <summary>
/// Calculates the position of the intersection (if any).
/// </summary>
/// <returns>The position of the intersection (null if it cannot be calculated).</returns>
IPosition Calculate()
{
IPosition xsect;
PointFeature closest;
if (m_Line1.Intersect(m_Line2, m_CloseTo, out xsect, out closest))
{
return(xsect);
}
else
{
return(null);
}
}
/// <summary>
/// Saves a line-line intersection.
/// </summary>
/// <returns>The point feature at the intersection (null if something went wrong).</returns>
PointFeature SaveLineLine()
{
IntersectTwoLinesOperation op = null;
try
{
LineFeature line1 = getLine1.Line;
bool wantSplit1 = getLine1.WantSplit;
LineFeature line2 = getLine2.Line;
bool wantSplit2 = getLine2.WantSplit;
IdHandle pointId = intersectInfo.PointId;
PointFeature closeTo = intersectInfo.ClosestPoint;
if (closeTo == null)
{
IPosition xsect;
if (!line1.Intersect(line2, null, out xsect, out closeTo))
{
throw new Exception("Cannot calculate intersection point");
}
Debug.Assert(closeTo != null);
}
op = new IntersectTwoLinesOperation(line1, wantSplit1, line2, wantSplit2, closeTo);
op.Execute(pointId);
return(op.IntersectionPoint);
}
catch (Exception ex)
{
MessageBox.Show(ex.StackTrace, ex.Message);
}
return(null);
}
/// <summary>
/// Returns the point feature closest to an intersection involving one or more line features.
/// </summary>
/// <returns>Null (always). Dialogs that involve instances of <see cref="GetLineControl"/>
/// are expected to override.</returns>
internal override PointFeature GetDefaultClosestPoint()
{
LineFeature line1 = getLine1.Line;
if (line1 == null)
{
return(null);
}
LineFeature line2 = getLine2.Line;
if (line2 == null)
{
return(null);
}
// The closest point may be null if the finish page has never been shown
PointFeature closeTo = intersectInfo.ClosestPoint;
IPosition xsect;
PointFeature closest;
line1.Intersect(line2, closeTo, out xsect, out closest);
return(closest);
}
