private string GetCircumference()
{
Point p1 = Point.Empty; // previous point
Point p2 = Point.Empty; // current point
double sum = 0;
PointFEnumerator enumerator = pointArray.GetEnumerator();
if (enumerator.MoveNext())
{
p1 = Point.Ceiling(enumerator.Current);
p1.Offset(MovingOffset);
}
while (enumerator.MoveNext())
{
p2 = Point.Ceiling(enumerator.Current);
p2.Offset(MovingOffset);
float x = System.Math.Abs(p2.X - p1.X);
float y = System.Math.Abs(p2.Y - p1.Y);
sum += Math.Sqrt(x * x + y * y) / UnitOfMeasureFactor;
p1 = p2;
}
enumerator.Reset();
if (enumerator.MoveNext())
{
p2 = Point.Ceiling(enumerator.Current);
p2.Offset(MovingOffset);
}
return(string.Format("{0:F2} {1}", sum, pictureBox.UnitOfMeasure.ToString()));
}
/// <summary>
/// draw object
/// </summary>
/// <param name="g"></param>
/// <param name="pictureBox"></param>
public override void Draw(Graphics g, ZWPictureBox pictureBox)
{
Point p1 = Point.Empty; // previous point
Point p2 = Point.Empty; // current point
g.SmoothingMode = SmoothingMode.AntiAlias;
using (Pen pen = new Pen(GraphicsProperties.Color, GraphicsProperties.PenWidth))
{
PointFEnumerator enumerator = pointArray.GetEnumerator();
if (enumerator.MoveNext())
{
p1 = Point.Ceiling(enumerator.Current);
p1.Offset(MovingOffset);
}
while (enumerator.MoveNext())
{
p2 = Point.Ceiling(enumerator.Current);
p2.Offset(MovingOffset);
g.DrawLine(pen, p1, p2);
p1 = p2;
}
enumerator.Reset();
if (enumerator.MoveNext())
{
p2 = Point.Ceiling(enumerator.Current);
p2.Offset(MovingOffset);
g.DrawLine(pen, p1, p2);
}
}
}
/// <summary>
/// Create graphic object used for hit test
/// </summary>
protected void CreateObjects()
{
Invalidate(); // invalidate every time, since draw area may resize
if (AreaPath != null)
{
return;
}
// Create closed path which contains all polygon vertexes
AreaPath = new GraphicsPath();
PointF p1 = PointF.Empty; // previous point
PointF p2 = PointF.Empty; // current point
PointFEnumerator enumerator = pointArray.GetEnumerator();
if (enumerator.MoveNext())
{
p1 = enumerator.Current;
}
while (enumerator.MoveNext())
{
p2 = enumerator.Current;
AreaPath.AddLine(p1, p2);
p1 = p2;
}
AreaPath.CloseFigure();
// Create region from the path
AreaRegion = new Region(AreaPath);
}