public virtual ISnapPoint SnapPoint(ICanvas canvas, UnitPoint point, List <IDrawObject> otherobj, Type[] runningsnaptypes, Type usersnaptype)
{
float thWidth = Line.ThresholdWidth(canvas, Width, ThresholdPixel);
if (runningsnaptypes != null)
{
foreach (Type snaptype in runningsnaptypes)
{
//if (snaptype == typeof(QuadrantSnapPoint))
//{
// UnitPoint p = HitUtil.NearestPointOnCircle(m_center, m_radius, point, 90);
// if (p != UnitPoint.Empty && HitUtil.PointInPoint(p, point, thWidth))
// return new QuadrantSnapPoint(canvas, this, p);
//}
if (snaptype == typeof(DivisionSnapPoint) && this.GetType().FullName == "Canvas.DrawTools.Circle")
{
double angle = 360 / Divisions;
UnitPoint p = HitUtil.NearestPointOnCircle(m_center, m_radius, point, angle);
if (p != UnitPoint.Empty && HitUtil.PointInPoint(p, point, thWidth))
{
return(new DivisionSnapPoint(canvas, this, p));
}
}
if (snaptype == typeof(DivisionSnapPoint))
{
//RadiusPoint
return(new NearestSnapPoint(canvas, this, RadiusPoint));
}
if (snaptype == typeof(CenterSnapPoint))
{
if (HitUtil.PointInPoint(m_center, point, thWidth))
{
return(new CenterSnapPoint(canvas, this, m_center));
}
}
if (snaptype == typeof(VertextSnapPoint))
{
if (HitUtil.PointInPoint(StartAnglePoint, point, thWidth))
{
return(new VertextSnapPoint(canvas, this, StartAnglePoint));
}
if (HitUtil.PointInPoint(EndAnglePoint, point, thWidth))
{
return(new VertextSnapPoint(canvas, this, EndAnglePoint));
}
}
}
return(null);
}
if (usersnaptype == typeof(NearestSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnCircle(m_center, m_radius, point, 0);
if (p != UnitPoint.Empty)
{
return(new NearestSnapPoint(canvas, this, p));
}
}
if (usersnaptype == typeof(PerpendicularSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnCircle(m_center, m_radius, point, 0);
if (p != UnitPoint.Empty)
{
return(new PerpendicularSnapPoint(canvas, this, p));
}
}
if (usersnaptype == typeof(QuadrantSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnCircle(m_center, m_radius, point, 90);
if (p != UnitPoint.Empty)
{
return(new QuadrantSnapPoint(canvas, this, p));
}
}
if (usersnaptype == typeof(DivisionSnapPoint))
{
double angle = 360 / Divisions;
UnitPoint p = HitUtil.NearestPointOnCircle(m_center, m_radius, point, angle);
if (p != UnitPoint.Empty)
{
return(new DivisionSnapPoint(canvas, this, p));
}
}
if (usersnaptype == typeof(TangentSnapPoint))
{
IDrawObject drawingObject = canvas.CurrentObject;
UnitPoint p = UnitPoint.Empty;
if (drawingObject is LineEdit)
{
UnitPoint mousepoint = point;
point = ((LineEdit)drawingObject).P1;
UnitPoint p1 = HitUtil.TangentPointOnCircle(m_center, m_radius, point, false);
UnitPoint p2 = HitUtil.TangentPointOnCircle(m_center, m_radius, point, true);
double d1 = HitUtil.Distance(mousepoint, p1);
double d2 = HitUtil.Distance(mousepoint, p2);
if (d1 <= d2)
{
return(new TangentSnapPoint(canvas, this, p1));
}
else
{
return(new TangentSnapPoint(canvas, this, p2));
}
}
//if (p != PointF.Empty)
return(new TangentSnapPoint(canvas, this, p));
}
if (usersnaptype == typeof(CenterSnapPoint))
{
return(new CenterSnapPoint(canvas, this, m_center));
}
return(null);
}
public virtual ISnapPoint SnapPoint(ICanvas canvas, UnitPoint point, List <IDrawObject> otherobj, Type[] runningsnaptypes, Type usersnaptype)
{
float thWidth = Line.ThresholdWidth(canvas, Width, ThresholdPixel);
if (runningsnaptypes != null)
{
foreach (Type snaptype in runningsnaptypes)
{
/*
* if (snaptype == typeof(QuadrantSnapPoint))
* {
* UnitPoint p = HitUtil.NearestPointOnCircle(m_center, m_radius, point, 90);
* if (p != UnitPoint.Empty && HitUtil.PointInPoint(p, point, thWidth))
* return new QuadrantSnapPoint(canvas, this, p);
* }
* if (snaptype == typeof(CenterSnapPoint))
* {
* if (HitUtil.PointInPoint(m_center, point, thWidth))
* return new CenterSnapPoint(canvas, this, m_center);
* }
* */
if (snaptype == typeof(VertextSnapPoint))
{
if (HitUtil.PointInPoint(P1, point, thWidth))
{
return(new VertextSnapPoint(canvas, this, P1));
}
if (HitUtil.PointInPoint(P3, point, thWidth))
{
return(new VertextSnapPoint(canvas, this, P3));
}
}
}
return(null);
}
if (usersnaptype == typeof(NearestSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnCircle(m_center, m_radius, point, 0);
if (p != UnitPoint.Empty)
{
return(new NearestSnapPoint(canvas, this, p));
}
}
if (usersnaptype == typeof(PerpendicularSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnCircle(m_center, m_radius, point, 0);
if (p != UnitPoint.Empty)
{
return(new PerpendicularSnapPoint(canvas, this, p));
}
}
if (usersnaptype == typeof(QuadrantSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnCircle(m_center, m_radius, point, 90);
if (p != UnitPoint.Empty)
{
return(new QuadrantSnapPoint(canvas, this, p));
}
}
if (usersnaptype == typeof(TangentSnapPoint))
{
IDrawObject drawingObject = canvas.CurrentObject;
UnitPoint p = UnitPoint.Empty;
if (drawingObject is LineEdit)
{
UnitPoint mousepoint = point;
point = ((LineEdit)drawingObject).P1;
UnitPoint p1 = HitUtil.TangentPointOnCircle(m_center, m_radius, point, false);
UnitPoint p2 = HitUtil.TangentPointOnCircle(m_center, m_radius, point, true);
double d1 = HitUtil.Distance(mousepoint, p1);
double d2 = HitUtil.Distance(mousepoint, p2);
if (d1 <= d2)
{
return(new TangentSnapPoint(canvas, this, p1));
}
else
{
return(new TangentSnapPoint(canvas, this, p2));
}
}
//if (p != PointF.Empty)
return(new TangentSnapPoint(canvas, this, p));
}
if (usersnaptype == typeof(CenterSnapPoint))
{
return(new CenterSnapPoint(canvas, this, m_center));
}
return(null);
}