public override void Draw(Graphics g, Point startPoint, Point endPoint)
{
GPath = new System.Drawing.Drawing2D.GraphicsPath();
GPath.AddLine(startPoint, endPoint);
// OutOfMemoryException if two points equal
if (startPoint != endPoint)
{
try
{
GPath.Widen(new Pen(Color.Red, 50F));
}
catch
{
// Do nothing
}
}
g.DrawLine(ArrowPen, startPoint, endPoint);
if (IsFocused || !string.IsNullOrEmpty(MiddleText))
{
int textHeight = (int)Math.Ceiling(g.MeasureString("A", Font).Height);
double angle = ShapeHelper.GetAngleBetween2PointsInDegrees(startPoint, endPoint);
if (IsFocused && !String.IsNullOrEmpty(StartText))
{
int textLength = (int)Math.Ceiling(g.MeasureString(StartText, Font).Width);
Point textPoint = ShapeHelper.GetPointOnCircle(startPoint, 40, angle);
textPoint.X = textPoint.X - textLength / 2;
textPoint.Y -= textHeight / 2;
g.FillRectangle(new SolidBrush(Color.White), new Rectangle(textPoint.X, textPoint.Y, textLength, textHeight));
g.DrawString(StartText, Font, TextBrush, textPoint);
}
if (IsFocused && !string.IsNullOrEmpty(EndText))
{
int textLength = (int)Math.Ceiling(g.MeasureString(EndText, Font).Width);
Point textPoint = ShapeHelper.GetPointOnCircle(endPoint, -40, angle);
textPoint.X = textPoint.X - textLength / 2;
textPoint.Y -= textHeight / 2;
g.FillRectangle(new SolidBrush(Color.White), new Rectangle(textPoint.X, textPoint.Y, textLength, textHeight));
g.DrawString(EndText, Font, TextBrush, textPoint);
}
if (!string.IsNullOrEmpty(MiddleText))
{
int textLength = (int)Math.Ceiling(g.MeasureString(MiddleText, Font).Width);
double lineLength = ShapeHelper.GetLineLength(startPoint, endPoint);
Point textPoint = ShapeHelper.GetPointOnCircle(startPoint, (int)(lineLength / 2), angle);
textPoint.X = textPoint.X - textLength / 2;
textPoint.Y -= textHeight / 2;
g.FillRectangle(new SolidBrush(Color.White), new Rectangle(textPoint.X, textPoint.Y, textLength, textHeight));
g.DrawString(MiddleText, Font, TextBrush, textPoint);
}
}
}
public override bool HitTest(System.Drawing.Point p)
{
System.Drawing.Drawing2D.GraphicsPath gp = new System.Drawing.Drawing2D.GraphicsPath();
Pen pn = new Pen(Color.Black, 10);
gp.AddLines(myPts);
gp.Widen(pn);
gp.IsVisible(p);
pn.Dispose();
return(gp.IsVisible(p));
}
