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 virtual void Draw(Graphics g, Point startPoint, Point endPoint)
{
if (startPoint == endPoint)
{
return;
}
MidPoint = ShapeHelper.GetLineMidPoint(startPoint, endPoint);
GPath = new System.Drawing.Drawing2D.GraphicsPath();
//GPath.AddLine(startPoint, endPoint);
Point pointA = new Point(startPoint.X + 16, startPoint.Y);
Point pointB = new Point(endPoint.X - 16, endPoint.Y);
GPath.AddLine(pointA, pointB);
// OutOfMemoryException if two points equal
if (pointA != pointB)
{
try
{
GPath.Widen(new Pen(Color.Red, 50F));
}
catch
{
// Do nothing
}
}
g.DrawLine(ArrowPen, startPoint, endPoint);
bool isHorizontal = startPoint.Y == endPoint.Y;
bool isVertical = startPoint.X == endPoint.X;
GPathFinishEnd = new GraphicsPath();
GPathStartEnd = new GraphicsPath();
if ((IsFocused || !ShowEndTextOnlyWhenFocused) || (!string.IsNullOrEmpty(MiddleText) && !ShowMiddleTextOnlyWhenFocused))
{
int textHeight = (int)Math.Ceiling(g.MeasureString("A", Font).Height);
double angle = ShapeHelper.GetAngleBetween2PointsInDegrees(startPoint, endPoint);
if ((IsFocused || !ShowEndTextOnlyWhenFocused) && !String.IsNullOrEmpty(StartText))
{
SizeF textSize = g.MeasureString(StartText, Font);
int textLength = (int)Math.Ceiling(textSize.Width);
Point textPoint = ShapeHelper.GetPointAlongLine(startPoint, endPoint, 35);
if (isHorizontal)
{
if (startPoint.X < endPoint.X)
{
textPoint.X = startPoint.X + 10;
textPoint.Y -= textHeight + 2;
}
else
{
textPoint.X = startPoint.X - textLength - 5;
textPoint.Y = startPoint.Y + 2;
}
}
else if (isVertical)
{
if (startPoint.Y > endPoint.Y)
{
textPoint.X = startPoint.X - textLength / 2;
textPoint.Y = startPoint.Y - textHeight * 2;
}
else
{
textPoint.X = startPoint.X - textLength / 2;
textPoint.Y = startPoint.Y + textHeight;
}
}
else
{
textPoint.X = textPoint.X - textLength / 2;
textPoint.Y -= textHeight / 2;
}
EndRectangle1 = new Rectangle(textPoint, new Size(textLength, textHeight));
if (!isHorizontal && !isVertical)
{
g.FillRectangle(BackBrush, EndRectangle1);
}
g.DrawString(StartText, Font, TextBrush, textPoint);
GPathFinishEnd.AddRectangle(EndRectangle1);
GPathStartImage = new GraphicsPath();
if (IsFocused && StartImage != null)
{
//StartImageRectangle = new Rectangle(EndRectangle1.Left - StartImage.Width - 2, EndRectangle1.Top, StartImage.Width, StartImage.Height);
StartImageRectangle = new Rectangle(EndRectangle1.Right + 2, EndRectangle1.Top, StartImage.Width, StartImage.Height);
g.FillRectangle(BackBrush, StartImageRectangle);
g.DrawImage(StartImage, StartImageRectangle);
GPathStartImage.AddRectangle(StartImageRectangle);
}
}
if ((IsFocused || !ShowEndTextOnlyWhenFocused) && !string.IsNullOrEmpty(EndText))
{
int textLength = (int)Math.Ceiling(g.MeasureString(EndText, Font).Width);
Point textPoint = ShapeHelper.GetPointAlongLine(endPoint, startPoint, 35);
if (isHorizontal)
{
if (startPoint.X < endPoint.X)
{
textPoint.X = endPoint.X - textLength - 5;
textPoint.Y = endPoint.Y + 2;
}
else
{
textPoint.X = endPoint.X + 10;
textPoint.Y -= textHeight + 2;
}
}
else if (isVertical)
{
if (startPoint.Y > endPoint.Y)
{
textPoint.X = endPoint.X - textLength / 2;
textPoint.Y = endPoint.Y + textHeight;
}
else
{
textPoint.X = endPoint.X - textLength / 2;
textPoint.Y = endPoint.Y - textHeight * 2;
}
}
else
{
textPoint.X = textPoint.X - textLength / 2;
textPoint.Y -= textHeight / 2;
}
EndRectangle2 = new Rectangle(textPoint, new Size(textLength, textHeight));
if (!isHorizontal && !isVertical)
{
g.FillRectangle(BackBrush, EndRectangle2);
}
g.DrawString(EndText, Font, TextBrush, textPoint);
GPathStartEnd.AddRectangle(EndRectangle2);
GPathEndImage = new GraphicsPath();
if (IsFocused && StartImage != null)
{
//EndImageRectangle = new Rectangle(EndRectangle2.Right + 2, EndRectangle2.Bottom - EndImage.Height, EndImage.Width, EndImage.Height);
EndImageRectangle = new Rectangle(EndRectangle2.Left - EndImage.Width - 2, EndRectangle2.Bottom - EndImage.Height, EndImage.Width, EndImage.Height);
g.FillRectangle(BackBrush, EndImageRectangle);
g.DrawImage(EndImage, EndImageRectangle);
GPathEndImage.AddRectangle(EndImageRectangle);
}
}
if (!string.IsNullOrEmpty(MiddleText) &&
(IsFocused || !ShowMiddleTextOnlyWhenFocused))
{
int textLength = (int)Math.Ceiling(g.MeasureString(MiddleText, Font).Width);
Point textPoint = MidPoint;
if (isHorizontal)
{
textPoint.X = textPoint.X - textLength / 2;
textPoint.Y -= textHeight + 2;
if (MiddleImage != null)
{
textPoint.Y -= MiddleImage.Height;
}
}
else
{
textPoint.X = textPoint.X - textLength / 2;
textPoint.Y -= textHeight * MiddleTextLineCount + MiddleImage.Height / 2 + 2;
}
g.FillRectangle(BackBrush, new Rectangle(textPoint.X, textPoint.Y, textLength, textHeight * MiddleTextLineCount));
g.DrawString(MiddleText, Font, TextBrush, textPoint);
}
}
GPathMiddleImage = new System.Drawing.Drawing2D.GraphicsPath();
Image image;
if (!IsFocused)
{
image = MiddleImage;
}
else
{
image = MiddleImageFocused != null ? MiddleImageFocused : MiddleImage;
}
if (image != null)
{
Point imagePos = MidPoint;
imagePos.Offset(-1 * image.Width / 2, -1 * image.Height / 2);
MiddleImageRectangle = new Rectangle(imagePos, image.Size);
g.FillRectangle(BackBrush, MiddleImageRectangle);
g.DrawImage(image, MiddleImageRectangle);
GPathMiddleImage.AddRectangle(MiddleImageRectangle);
}
//#region Add circles at each end
//int radius = 20;
//Point circleCentre = ShapeHelper.GetPointAlongLine(startPoint, endPoint, radius);
//GPathEnd1.AddPath(ShapeHelper.GetCirclePath(circleCentre, radius), false);
////g.DrawPath(new Pen(TextBrush), GPathEnd1);
//circleCentre = ShapeHelper.GetPointAlongLine(endPoint, startPoint, radius);
//GPathEnd2.AddPath(ShapeHelper.GetCirclePath(circleCentre, radius), false);
////g.DrawPath(new Pen(TextBrush), GPathEnd2);
//#endregion
}