public void SnapPoint(ref Point snapPosition, out double snapAngle)
{
snapAngle = 0;
PointCollection points = line.Points;
if (points.Count < 2)
{
return;
}
Point bestSnapPoint = new Point(Double.NaN, Double.NaN);
double bestSnapLengthSq = double.PositiveInfinity;
Point lastPoint = points[0];
for (int i = 1; i < points.Count; i++)
{
Point curPoint = points[i];
AnchorPoint.SnapToLineSegment(lastPoint, curPoint, snapPosition, ref bestSnapLengthSq, ref bestSnapPoint, ref snapAngle);
lastPoint = curPoint;
}
snapPosition = bestSnapPoint;
}
private void snapToPolygon(PointCollection points, Point origin, ref double bestSnapLengthSq, ref Point bestSnapPoint, ref double snapAngle)
{
var cv = CanvasView.GetCanvasView(this);
if (cv == null)
{
return;
}
Vector thisOffset = cv.ElementFromControl(this).GetPositionAttributes() - new Point(0, 0);
for (int i = 0; i < points.Count; i++)
{
Point from = points[i] + thisOffset;
Point to = points[(i + 1) % points.Count] + thisOffset;
AnchorPoint.SnapToLineSegment(from, to, origin, ref bestSnapLengthSq, ref bestSnapPoint, ref snapAngle);
}
}
public void SnapPoint(ref Point snapPosition, out double snapAngle)
{
snapAngle = 0;
var cv = CanvasView.GetCanvasView(this);
if (cv == null)
{
return;
}
Point pos = cv.ElementFromControl(this).Position;
// An array of line segments, each line segment represented as four double values.
double[] shape =
{
pos.X, pos.Y,
pos.X, pos.Y + ActualHeight,
pos.X, pos.Y + ActualHeight,
pos.X + ActualWidth, pos.Y + ActualHeight,
pos.X + ActualWidth, pos.Y + ActualHeight,
pos.X + ActualWidth, pos.Y,
pos.X + ActualWidth, pos.Y,
pos.X, pos.Y,
};
Point bestSnapPoint = new Point(double.NaN, double.NaN);
double bestSnapLengthSq = double.PositiveInfinity;
for (int i = 0; i < shape.Length; i += 4)
{
Point from = new Point(shape[i], shape[i + 1]);
Point to = new Point(shape[i + 2], shape[i + 3]);
AnchorPoint.SnapToLineSegment(from, to, snapPosition, ref bestSnapLengthSq, ref bestSnapPoint, ref snapAngle);
}
snapPosition = bestSnapPoint;
}