public EditorState()
{
_tool = EditorTool.Spiro;
_mode = EditorMode.Create;
_displayKnots = true;
_displayGuides = true;
_snapX = 15.0;
_snapY = 15.0;
_enableSnap = true;
_shape = null;
_hitTreshold = 7;
_hitTresholdSquared = 49;
_hitSetShapes = new HashSet <SpiroShape>();
_hitSetPoints = new HashSet <int>();
_hitListShapes = new ObservableCollection <SpiroShape>();
_hitListPoints = new ObservableCollection <int>();
_isStroked = true;
_isFilled = false;
_isClosed = true;
_isTagged = false;
_pointType = SpiroPointType.G4;
_isCaptured = false;
_snapTreshold = 10.0;
_snapMode = GuideSnapMode.Point | GuideSnapMode.Middle | GuideSnapMode.Intersection | GuideSnapMode.Horizontal | GuideSnapMode.Vertical;
_snapPointRadius = 3.5;
_snapPoint = default(GuidePoint);
_haveSnapPoint = false;
}
public EditorState()
{
_tool = EditorTool.Spiro;
_mode = EditorMode.Create;
_displayKnots = true;
_displayGuides = true;
_snapX = 15.0;
_snapY = 15.0;
_enableSnap = true;
_shape = null;
_hitTreshold = 7;
_hitTresholdSquared = 49;
_hitSetShapes = new HashSet<SpiroShape>();
_hitSetPoints = new HashSet<int>();
_hitListShapes = new ObservableCollection<SpiroShape>();
_hitListPoints = new ObservableCollection<int>();
_isStroked = true;
_isFilled = false;
_isClosed = true;
_isTagged = false;
_pointType = SpiroPointType.G4;
_isCaptured = false;
_snapTreshold = 10.0;
_snapMode = GuideSnapMode.Point | GuideSnapMode.Middle | GuideSnapMode.Intersection | GuideSnapMode.Horizontal | GuideSnapMode.Vertical;
_snapPointRadius = 3.5;
_snapPoint = default(GuidePoint);
_haveSnapPoint = false;
}
public static bool TryToSnapToGuideLine(IList<GuideLine> guides, GuideSnapMode mode, double treshold, GuidePoint point, out GuidePoint snap, out GuideSnapMode result)
{
snap = default(GuidePoint);
result = default(GuideSnapMode);
if (guides.Count == 0 || mode == GuideSnapMode.None)
{
return false;
}
if (mode.HasFlag(GuideSnapMode.Point))
{
foreach (var guide in guides)
{
var distance0 = GuideHelpers.Distance(guide.Point0, point);
if (distance0 < treshold)
{
snap = new GuidePoint(guide.Point0.X, guide.Point0.Y);
result = GuideSnapMode.Point;
return true;
}
var distance1 = GuideHelpers.Distance(guide.Point1, point);
if (distance1 < treshold)
{
snap = new GuidePoint(guide.Point1.X, guide.Point1.Y);
result = GuideSnapMode.Point;
return true;
}
}
}
if (mode.HasFlag(GuideSnapMode.Middle))
{
foreach (var guide in guides)
{
var middle = GuideHelpers.Middle(guide.Point0, guide.Point1);
var distance = GuideHelpers.Distance(middle, point);
if (distance < treshold)
{
snap = middle;
result = GuideSnapMode.Middle;
return true;
}
}
}
if (mode.HasFlag(GuideSnapMode.Nearest))
{
foreach (var guide in guides)
{
var nearest = GuideHelpers.NearestPointOnLine(guide.Point0, guide.Point1, point);
var distance = GuideHelpers.Distance(nearest, point);
if (distance < treshold)
{
snap = nearest;
result = GuideSnapMode.Nearest;
return true;
}
}
}
if (mode.HasFlag(GuideSnapMode.Intersection))
{
foreach (var guide0 in guides)
{
foreach (var guide1 in guides)
{
if (guide0 == guide1)
continue;
GuidePoint intersection;
if (GuideHelpers.LineLineIntersection(guide0.Point0, guide0.Point1, guide1.Point0, guide1.Point1, out intersection))
{
var distance = GuideHelpers.Distance(intersection, point);
if (distance < treshold)
{
snap = intersection;
result = GuideSnapMode.Intersection;
return true;
}
}
}
}
}
double horizontal = default(double);
double vertical = default(double);
if (mode.HasFlag(GuideSnapMode.Horizontal))
{
foreach (var guide in guides)
{
if (point.Y >= guide.Point0.Y - treshold && point.Y <= guide.Point0.Y + treshold)
{
snap = new GuidePoint(point.X, guide.Point0.Y);
result |= GuideSnapMode.Horizontal;
horizontal = guide.Point0.Y;
break;
}
if (point.Y >= guide.Point1.Y - treshold && point.Y <= guide.Point1.Y + treshold)
{
snap = new GuidePoint(point.X, guide.Point1.Y);
result |= GuideSnapMode.Horizontal;
horizontal = guide.Point1.Y;
break;
}
}
}
if (mode.HasFlag(GuideSnapMode.Vertical))
{
foreach (var guide in guides)
{
if (point.X >= guide.Point0.X - treshold && point.X <= guide.Point0.X + treshold)
{
snap = new GuidePoint(guide.Point0.X, point.Y);
result |= GuideSnapMode.Vertical;
vertical = guide.Point0.X;
break;
}
if (point.X >= guide.Point1.X - treshold && point.X <= guide.Point1.X + treshold)
{
snap = new GuidePoint(guide.Point1.X, point.Y);
result |= GuideSnapMode.Vertical;
vertical = guide.Point1.X;
break;
}
}
}
if (result.HasFlag(GuideSnapMode.Horizontal) || result.HasFlag(GuideSnapMode.Vertical))
{
snap = new GuidePoint(
result.HasFlag(GuideSnapMode.Vertical) ? vertical : point.X,
result.HasFlag(GuideSnapMode.Horizontal) ? horizontal : point.Y);
return true;
}
return false;
}
public static bool TryToSnapToGuideLine(IList <GuideLine> guides, GuideSnapMode mode, double treshold, GuidePoint point, out GuidePoint snap, out GuideSnapMode result)
{
snap = default(GuidePoint);
result = default(GuideSnapMode);
if (guides.Count == 0 || mode == GuideSnapMode.None)
{
return(false);
}
if (mode.HasFlag(GuideSnapMode.Point))
{
foreach (var guide in guides)
{
var distance0 = GuideHelpers.Distance(guide.Point0, point);
if (distance0 < treshold)
{
snap = new GuidePoint(guide.Point0.X, guide.Point0.Y);
result = GuideSnapMode.Point;
return(true);
}
var distance1 = GuideHelpers.Distance(guide.Point1, point);
if (distance1 < treshold)
{
snap = new GuidePoint(guide.Point1.X, guide.Point1.Y);
result = GuideSnapMode.Point;
return(true);
}
}
}
if (mode.HasFlag(GuideSnapMode.Middle))
{
foreach (var guide in guides)
{
var middle = GuideHelpers.Middle(guide.Point0, guide.Point1);
var distance = GuideHelpers.Distance(middle, point);
if (distance < treshold)
{
snap = middle;
result = GuideSnapMode.Middle;
return(true);
}
}
}
if (mode.HasFlag(GuideSnapMode.Nearest))
{
foreach (var guide in guides)
{
var nearest = GuideHelpers.NearestPointOnLine(guide.Point0, guide.Point1, point);
var distance = GuideHelpers.Distance(nearest, point);
if (distance < treshold)
{
snap = nearest;
result = GuideSnapMode.Nearest;
return(true);
}
}
}
if (mode.HasFlag(GuideSnapMode.Intersection))
{
foreach (var guide0 in guides)
{
foreach (var guide1 in guides)
{
if (guide0 == guide1)
{
continue;
}
GuidePoint intersection;
if (GuideHelpers.LineLineIntersection(guide0.Point0, guide0.Point1, guide1.Point0, guide1.Point1, out intersection))
{
var distance = GuideHelpers.Distance(intersection, point);
if (distance < treshold)
{
snap = intersection;
result = GuideSnapMode.Intersection;
return(true);
}
}
}
}
}
double horizontal = default(double);
double vertical = default(double);
if (mode.HasFlag(GuideSnapMode.Horizontal))
{
foreach (var guide in guides)
{
if (point.Y >= guide.Point0.Y - treshold && point.Y <= guide.Point0.Y + treshold)
{
snap = new GuidePoint(point.X, guide.Point0.Y);
result |= GuideSnapMode.Horizontal;
horizontal = guide.Point0.Y;
break;
}
if (point.Y >= guide.Point1.Y - treshold && point.Y <= guide.Point1.Y + treshold)
{
snap = new GuidePoint(point.X, guide.Point1.Y);
result |= GuideSnapMode.Horizontal;
horizontal = guide.Point1.Y;
break;
}
}
}
if (mode.HasFlag(GuideSnapMode.Vertical))
{
foreach (var guide in guides)
{
if (point.X >= guide.Point0.X - treshold && point.X <= guide.Point0.X + treshold)
{
snap = new GuidePoint(guide.Point0.X, point.Y);
result |= GuideSnapMode.Vertical;
vertical = guide.Point0.X;
break;
}
if (point.X >= guide.Point1.X - treshold && point.X <= guide.Point1.X + treshold)
{
snap = new GuidePoint(guide.Point1.X, point.Y);
result |= GuideSnapMode.Vertical;
vertical = guide.Point1.X;
break;
}
}
}
if (result.HasFlag(GuideSnapMode.Horizontal) || result.HasFlag(GuideSnapMode.Vertical))
{
snap = new GuidePoint(
result.HasFlag(GuideSnapMode.Vertical) ? vertical : point.X,
result.HasFlag(GuideSnapMode.Horizontal) ? horizontal : point.Y);
return(true);
}
return(false);
}
