public EntitySide(PointD p, RectangleD bounds, EntitySideType type)
{
_type = type;
switch (_type)
{
case EntitySideType.OnBottom:
_range = Math.Abs(bounds.Top - p.Y);
break;
case EntitySideType.OnLeft:
_range = Math.Abs(bounds.Right - p.X);
break;
case EntitySideType.OnRight:
_range = Math.Abs(bounds.Left - p.X);
break;
case EntitySideType.OnTop:
_range = Math.Abs(bounds.Bottom - p.Y);
break;
}
}
private static void DrawAssociationEnd(
DiagramPaintEventArgs e, IGeometryHost geometryHost,
NodeShape node, PointD pointOnBorder, PointD endPoint,
bool many, bool optional, bool id, string predicateText, ref PointF?lineEnd, bool bothOptional)
{
Pen pen;
ShapeElement shapeHost;
IOffsetBorderPoint offsetPointProvider;
Font font;
Brush brush;
Graphics g = e.Graphics;
if (null != (shapeHost = node) &&
null != (offsetPointProvider = shapeHost.ShapeGeometry as IOffsetBorderPoint) &&
null != (pen = geometryHost.GeometryStyleSet.GetPen(DiagramPens.ConnectionLine)) &&
null != (font = geometryHost.GeometryStyleSet.GetFont(DiagramFonts.ConnectionLine)) &&
null != (brush = geometryHost.GeometryStyleSet.GetBrush(DiagramBrushes.ConnectionLineText)))
{
Color restoreColor = pen.Color;
pen.Color = geometryHost.UpdateGeometryLuminosity(e.View, pen);
double angle = GeometryUtility.CalculateRadiansRotationAngle(endPoint, pointOnBorder);
PointD vertexPoint = pointOnBorder;
vertexPoint.Offset(CrowsFootHeight * Math.Cos(angle), CrowsFootHeight * Math.Sin(angle));
#region draw the main line
Pen mainLinePen = (Pen)pen.Clone();
if (optional)
{
mainLinePen.DashPattern = DashPattern;
mainLinePen.DashOffset = DashPattern[0];
}
if (many & optional)
{
if (!bothOptional)
{
g.DrawLine(mainLinePen, PointD.ToPointF(endPoint), PointD.ToPointF(vertexPoint));
}
else
{
lineEnd = PointD.ToPointF(vertexPoint);
}
g.DrawLine(pen, PointD.ToPointF(vertexPoint), PointD.ToPointF(pointOnBorder));
}
else
{
if (!bothOptional)
{
g.DrawLine(mainLinePen, PointD.ToPointF(endPoint), PointD.ToPointF(pointOnBorder));
}
else
{
lineEnd = PointD.ToPointF(pointOnBorder);
}
}
#endregion
#region draw crow's foot if necessary
if (many)
{
PointD?offsetBorderPoint = offsetPointProvider.OffsetBorderPoint(shapeHost, pointOnBorder, vertexPoint, CrowsFootHalfWidth, CrowsFootParallelMode);
if (offsetBorderPoint.HasValue)
{
g.DrawLine(pen, PointD.ToPointF(vertexPoint), PointD.ToPointF(offsetBorderPoint.Value));
}
offsetBorderPoint = offsetPointProvider.OffsetBorderPoint(shapeHost, pointOnBorder, vertexPoint, -CrowsFootHalfWidth, CrowsFootParallelMode);
if (offsetBorderPoint.HasValue)
{
g.DrawLine(pen, PointD.ToPointF(vertexPoint), PointD.ToPointF(offsetBorderPoint.Value));
}
}
#endregion
#region draw tick mark if necessary
if (id)
{
PointD oneMarkLeft = vertexPoint;
double cosAngle = Math.Cos(angle);
double sinAngle = Math.Sin(angle);
oneMarkLeft.Offset(InfEngInnerOneMarkOffset * cosAngle, InfEngInnerOneMarkOffset * sinAngle);
PointD oneMarkRight = oneMarkLeft;
oneMarkLeft.Offset(-InfEngMarkerHalfWidth * sinAngle, InfEngMarkerHalfWidth * cosAngle);
oneMarkRight.Offset(InfEngMarkerHalfWidth * sinAngle, -InfEngMarkerHalfWidth * cosAngle);
g.DrawLine(pen, PointD.ToPointF(oneMarkLeft), PointD.ToPointF(oneMarkRight));
}
#endregion
#region draw text
//determine the line's properties
double edgeX = pointOnBorder.X;
double edgeY = pointOnBorder.Y;
EntitySideType whichSideShapeIsOn = EntitySide.FindWhichSide(pointOnBorder, shapeHost.GeometryBoundingBox);
double w = 0; //, y = 0;
angle = Math.Atan2(Math.Abs(endPoint.Y - edgeY), Math.Abs(endPoint.X - edgeX));
double inDegrees = angle * 180 / Math.PI;
if (inDegrees < 0)
{
inDegrees += 360;
}
SizeF textSize = g.MeasureString(predicateText, font);
w = textSize.Width;
//y = Math.Abs(w * Math.Tan(angle));
//determine what to offset
double textX = edgeX;
double textY = edgeY;
double h = textSize.Height;
bool lessThan45 = inDegrees < 45;
switch (whichSideShapeIsOn)
{
case EntitySideType.OnBottom:
textY -= TextPaddingY + h;
if (lessThan45)
{
textX += TextPaddingX;
}
else
{
textX -= TextPaddingX + w;
}
break;
case EntitySideType.OnTop:
textY += TextPaddingY;
if (lessThan45)
{
textX -= TextPaddingX + w;
}
else
{
textX += TextPaddingX;
}
break;
case EntitySideType.OnLeft:
textX += TextPaddingX;
if (lessThan45)
{
textY -= TextPaddingY + h;
}
else
{
textY += TextPaddingY;
}
break;
case EntitySideType.OnRight:
textX -= TextPaddingX + w;
if (lessThan45)
{
textY += TextPaddingY;
}
else
{
textY -= TextPaddingY + h;
}
break;
}
//perform the drawing
g.DrawString(predicateText, font, brush, new PointF((float)textX, (float)textY));
#endregion
pen.Color = restoreColor;
}
}
