// ========================================
// property
// ========================================
// ========================================
// method
// ========================================
public void Relocate(IFigure figure, IFigure parent)
{
var edge = (IEdge)parent;
var srcPt = edge.SourcePoint;
var nextPt = edge.FirstRef.Next.EdgePoint;
var bounds = figure.Bounds;
var srcBounds = Rectangle.Empty;
if (edge.Source == null)
{
var xDiff = Math.Abs(srcPt.X - nextPt.X);
var yDiff = Math.Abs(srcPt.Y - nextPt.Y);
if (xDiff < yDiff)
{
if (srcPt.Y < nextPt.Y)
{
srcBounds = Rectangle.FromLTRB(
srcPt.X - _boundsDistance / 2,
srcPt.Y - _boundsDistance,
srcPt.X + _boundsDistance / 2,
srcPt.Y
);
}
else
{
srcBounds = Rectangle.FromLTRB(
srcPt.X - _boundsDistance / 2,
srcPt.Y,
srcPt.X + _boundsDistance / 2,
srcPt.Y + _boundsDistance
);
}
}
else
{
if (srcPt.X < nextPt.X)
{
srcBounds = Rectangle.FromLTRB(
srcPt.X - _boundsDistance,
srcPt.Y - _boundsDistance / 2,
srcPt.X,
srcPt.Y + _boundsDistance / 2
);
}
else
{
srcBounds = Rectangle.FromLTRB(
srcPt.X,
srcPt.Y - _boundsDistance / 2,
srcPt.X + _boundsDistance,
srcPt.Y + _boundsDistance / 2
);
}
}
}
else
{
srcBounds = edge.Source.Bounds;
}
var inflatedBounds = srcBounds;
inflatedBounds.Inflate(_boundsDistance, _boundsDistance);
var isPt = RectUtil.GetIntersectionPointOfRectAndExtendedLineSeg(inflatedBounds, edge.SourcePoint, nextPt);
var dir = RectUtil.GetOuterDirection(srcBounds, isPt);
if (DirectionUtil.ContainsUp(dir))
{
/// up
if (_direction == LocateDirectionKind.Left)
{
figure.Location = new Point(isPt.X - _intersectionDistance - bounds.Width + FigureConsts.LineEndCharWidth, isPt.Y - bounds.Height);
}
else
{
figure.Location = new Point(isPt.X + _intersectionDistance, isPt.Y - bounds.Height);
}
}
else if (DirectionUtil.ContainsDown(dir))
{
/// down
if (_direction == LocateDirectionKind.Left)
{
figure.Location = new Point(isPt.X - _intersectionDistance - bounds.Width + FigureConsts.LineEndCharWidth, isPt.Y);
}
else
{
figure.Location = new Point(isPt.X + _intersectionDistance, isPt.Y);
}
}
else if (DirectionUtil.ContainsLeft(dir))
{
/// left
if (_direction == LocateDirectionKind.Left)
{
figure.Location = new Point(isPt.X - bounds.Width + FigureConsts.LineEndCharWidth, isPt.Y - _intersectionDistance - bounds.Height);
}
else
{
figure.Location = new Point(isPt.X - bounds.Width + FigureConsts.LineEndCharWidth, isPt.Y + _intersectionDistance);
}
}
else
{
/// right
if (_direction == LocateDirectionKind.Left)
{
figure.Location = new Point(isPt.X, isPt.Y - _intersectionDistance - bounds.Height);
}
else
{
figure.Location = new Point(isPt.X, isPt.Y + _intersectionDistance);
}
}
}
