/// <summary>
/// Provides the center of the transition arrow
/// </summary>
/// <returns></returns>
public Point getCenter()
{
// Set the start & end location of the arrow
Point startLocation = StartLocation;
Point targetLocation = TargetLocation;
// Set the location of the text
Span Xspan = new Span(startLocation.X, targetLocation.X);
Span Yspan = new Span(startLocation.Y, targetLocation.Y);
int x = Math.Min(startLocation.X, targetLocation.X) + Xspan.Center;
int y = Math.Min(startLocation.Y, targetLocation.Y) + Yspan.Center;
return new Point(x, y);
}
/// <summary>
/// Provides the intersection of two spans
/// </summary>
/// <param name="span1"></param>
/// <param name="span2"></param>
/// <returns></returns>
public static Span Intersection(Span span1, Span span2)
{
Span retVal = null;
if (span1.LowBound > span2.LowBound)
{
Span tmp = span1;
span1 = span2;
span2 = tmp;
}
// span1.LowBound <= span2.LowBound
if (span1.HighBound < span2.LowBound)
{
retVal = null;
}
else
{
// span1.LowBound < span2.LowBound and span1.HighBound >= span2.LowBound
int LowBound = span2.LowBound;
int HighBound;
if (span1.HighBound > span2.HighBound)
{
HighBound = span2.HighBound;
}
else
{
HighBound = span1.HighBound;
}
retVal = new Span(LowBound, HighBound);
}
return retVal;
}