/// <summary>
/// Return a ConnectionLeg which contains draw instructions for a line that runs
/// from the DepartureSide of a shape to the location of the orbit that runs
/// around the shape.
/// </summary>
/// <param name="FromShape"></param>
/// <param name="DepartureSide"></param>
/// <returns></returns>
public static ConnectionLeg DrawLegToOrbit(Shape FromShape, WhichSide DepartureSide)
{
var sideCoor = FromShape.GetSide(DepartureSide);
var midPt = sideCoor.MidPoint;
double lgthToOrbit = 30;
ConnectionLeg leg = null;
// draw line depending on the side of the shape.
LineCoordinates legCoor = null;
var whichDir = DepartureSide.ToDirection();
legCoor = new LineCoordinates(midPt, new LineVector(lgthToOrbit, whichDir));
// line is off the canvas. do not create a connection leg.
if ((legCoor.Start.X < 0) || (legCoor.Start.Y < 0) || (legCoor.End.X < 0) ||
(legCoor.End.Y < 0))
{
leg = null;
}
else
{
leg = new ConnectionLeg()
{
Start = midPt,
LineCoor = legCoor,
Direction = whichDir
};
}
return(leg);
}
public void AddLeg(ConnectionLeg Connector)
{
var node = new LinkedListNode <ConnectionLeg>(Connector);
Connector.Node = node;
this.LegList.AddLast(node);
}
public static ConnectionLeg DrawLegToShape(
Shape FromShape, Shape ToShape, ConnectionLeg LastLeg,
WhichDirection Direction)
{
ConnectionLeg leg = null;
LineCoordinates legCoor = null;
var toShapeInfo = ToShape.DirectionToShape(LastLeg.End);
// start point of the leg.
var legStart = LastLeg.End;
// attempt to draw a direct line to the shape.
if (legCoor == null)
{
legCoor = ConnectionRoute.TryDrawDirectLineToShape(
toShapeInfo, legStart, Direction);
}
// drawing a vertical line. draw it to the halfway point of the vertical side
// of the shape.
if ((legCoor == null) &&
Direction.IsVertical() &&
(toShapeInfo.VertDirection.Equals(Direction)))
{
var toPoint = new Point(legStart.X, toShapeInfo.VertSide.MidPoint.Y);
legCoor = new LineCoordinates(legStart, toPoint);
}
// drawing a horizontal line. draw it to the halfway point of the horiz side of
// the shape.
if ((legCoor == null) &&
Direction.IsHorizontal() &&
(toShapeInfo.HorizDirection.Equals(Direction)))
{
var toPoint = new Point(toShapeInfo.HorizSide.MidPoint.X, legStart.Y);
legCoor = new LineCoordinates(legStart, toPoint);
}
// leg not drawn. The current leg is part of an orbit around a shape. Have to draw to
// the next corner of the orbit.
if (legCoor == null)
{
var rectMore = ShapeMore.Construct(FromShape);
legCoor = rectMore.DrawLineToOrbitCorner(legStart, Direction);
}
leg = new ConnectionLeg()
{
Direction = Direction,
LineCoor = legCoor,
Start = legStart
};
return(leg);
}
public static ConnectionLeg DrawLegFromPoint(Point FromPoint, LineVector Vector)
{
// draw line depending on the side of the shape.
var legCoor = new LineCoordinates(FromPoint, Vector);
var leg = new ConnectionLeg()
{
Start = FromPoint,
LineCoor = legCoor,
Direction = Vector.Direction
};
return(leg);
}
public ConnectionLeg DrawInitialLegToShape()
{
ConnectionLeg leg = null;
LineCoordinates legCoor = null;
Point? legStart = null;
// starting side
var fromSide = this.FromSide;
var toShapeInfo = new SideToShapeInfo(fromSide, this.ToShape);
// the direction of the initial line.
var dir = fromSide.WhichSide.ToDirection();
// draw horizontal line staight to the target shape.
if (toShapeInfo.HorizDirection.Equals(dir) &&
(toShapeInfo.VertIntersect != null) &&
(toShapeInfo.VertIntersect.Length > 0))
{
var vi = toShapeInfo.VertIntersect;
double centeredIntersect1 = vi.Line1Ofs + (vi.Length / 2);
legStart = vi.Line1.CalcVerticalPointOnLine(centeredIntersect1);
double centeredIntersect2 = vi.Line2Ofs + (vi.Length / 2);
Point toPt = vi.Line2.CalcVerticalPointOnLine(centeredIntersect2);
legCoor = new LineCoordinates(legStart.Value, toPt);
}
// draw vertical staight to the target shape.
else if (toShapeInfo.VertDirection.Equals(dir) &&
(toShapeInfo.HorizIntersect != null) &&
(toShapeInfo.HorizIntersect.Length > 0))
{
var hi = toShapeInfo.HorizIntersect;
double centeredIntersect1 = hi.Line1Ofs + (hi.Length / 2);
legStart = hi.Line1.CalcHorizontalPointOnLine(centeredIntersect1);
double centeredIntersect2 = hi.Line2Ofs + (hi.Length / 2);
Point toPt = hi.Line2.CalcHorizontalPointOnLine(centeredIntersect2);
legCoor = new LineCoordinates(legStart.Value, toPt);
}
// drawing a vertical line.
// The end destination shape is in the direction of the vertical line.
// ( ex: drawing the line down and the shape is below the side )
// Draw the line to the mid point of the vertical side of the to_shape.
else if (toShapeInfo.VertDirection.Equals(dir))
{
// start the leg at the mid point of the start from side.
legStart = fromSide.LineCoor.MidPoint;
// draw the line down ( or up ) to the mid point of the vertical side
// ( either left or right side ) of the "to shape".
var toY = toShapeInfo.VertSide.MidPoint.Y;
var legEnd = new Point(legStart.Value.X, toY);
legCoor = new LineCoordinates(legStart.Value, legEnd);
}
// drawing a horizontal line.
// The end destination shape is in the direction of the horizontal line.
// ( ex: drawing the line to the right and the shape is to the righ of the side )
// Draw the line to the mid point of the horizonntal side of the to_shape.
else if (toShapeInfo.HorizDirection.Equals(dir))
{
// start the leg at the mid point of the start from side.
legStart = fromSide.LineCoor.MidPoint;
// draw the line left ( or right ) to the mid point of the horiz side
var toX = toShapeInfo.HorizSide.MidPoint.X;
var legEnd = new Point(toX, legStart.Value.Y);
legCoor = new LineCoordinates(legStart.Value, legEnd);
}
// create the leg.
if (legCoor != null)
{
leg = new ConnectionLeg()
{
Direction = dir,
LineCoor = legCoor,
Start = legStart.Value
};
}
// draw a short line from the shape to the next available orbit location
// around the from shape.
else
{
leg = ConnectionLeg.DrawLegToOrbit(this.FromSide.Shape, this.FromSide.WhichSide);
}
return(leg);
}