public ISnapPoint SnapPoint(ICanvas canvas, UnitPoint unitPoint, List <IDrawObject> drawObjects, Type[] runningSnapTypes, Type userSnapType)
{
float thWidth = UCCanvas.GetThresholdWidth();
if (runningSnapTypes != null)
{
foreach (Type snaptype in runningSnapTypes)
{
if (snaptype == typeof(VertextSnapPoint))
{
if (HitUtil.CircleHitPoint(this.P1, thWidth, unitPoint))
{
return(new VertextSnapPoint(canvas, this, this.P1));
}
if (HitUtil.CircleHitPoint(this.P2, thWidth, unitPoint))
{
return(new VertextSnapPoint(canvas, this, this.P2));
}
}
if (snaptype == typeof(MidpointSnapPoint))
{
UnitPoint p = MidPoint(canvas, this.P1, this.P2, unitPoint);
if (p != UnitPoint.Empty)
{
return(new MidpointSnapPoint(canvas, this, p));
}
}
if (snaptype == typeof(IntersectSnapPoint))
{
Line otherline = Utils.Utils.FindObjectTypeInList(this, drawObjects, typeof(Line)) as Line;
if (otherline == null)
{
continue;
}
UnitPoint p = HitUtil.LinesIntersectPoint(this.P1, this.P2, otherline.P1, otherline.P2);
if (p != UnitPoint.Empty)
{
return(new IntersectSnapPoint(canvas, this, p));
}
}
}
return(null);
}
if (userSnapType == typeof(MidpointSnapPoint))
{
return(new MidpointSnapPoint(canvas, this, HitUtil.LineMidpoint(this.P1, this.P2)));
}
if (userSnapType == typeof(IntersectSnapPoint))
{
Line otherline = Utils.Utils.FindObjectTypeInList(this, drawObjects, typeof(Line)) as Line;
if (otherline == null)
{
return(null);
}
UnitPoint p = HitUtil.LinesIntersectPoint(this.P1, this.P2, otherline.P1, otherline.P2);
if (p != UnitPoint.Empty)
{
return(new IntersectSnapPoint(canvas, this, p));
}
}
if (userSnapType == typeof(VertextSnapPoint))
{
double d1 = HitUtil.Distance(unitPoint, this.P1);
double d2 = HitUtil.Distance(unitPoint, this.P2);
if (d1 <= d2)
{
return(new VertextSnapPoint(canvas, this, this.P1));
}
return(new VertextSnapPoint(canvas, this, this.P2));
}
if (userSnapType == typeof(NearestSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnLine(this.P1, this.P2, unitPoint);
if (p != UnitPoint.Empty)
{
return(new NearestSnapPoint(canvas, this, p));
}
}
if (userSnapType == typeof(PerpendicularSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnLine(this.P1, this.P2, unitPoint);
if (p != UnitPoint.Empty)
{
return(new PerpendicularSnapPoint(canvas, this, p));
}
}
return(null);
}
/// <summary>
/// 根据给定类型返回点的快照信息
/// </summary>
/// <param name="canvas"></param>
/// <param name="point"></param>
/// <param name="otherobj"></param>
/// <param name="runningsnaptypes"></param>
/// <param name="usersnaptype"></param>
/// <returns></returns>
ISnapPoint IDrawObject.SnapPoint(ICanvas canvas, UnitPoint point, List <IDrawObject> otherobj, Type[] runningsnaptypes, Type usersnaptype)
{
float thWidth = ThresholdWidth(canvas, Width);
if (runningsnaptypes != null)
{
foreach (Type snaptype in runningsnaptypes)
{
if (snaptype == typeof(VertextSnapPoint))
{
if (HitUtil.CircleHitPoint(m_p1, thWidth, point))
{
return(new VertextSnapPoint(canvas, this, m_p1));
}
if (HitUtil.CircleHitPoint(m_p2, thWidth, point))
{
return(new VertextSnapPoint(canvas, this, m_p2));
}
}
if (snaptype == typeof(MidpointSnapPoint))
{
UnitPoint p = MidPoint(canvas, m_p1, m_p2, point);
if (p != UnitPoint.Empty)
{
return(new MidpointSnapPoint(canvas, this, p));
}
}
if (snaptype == typeof(IntersectSnapPoint))
{
Rectangle rectangle = Utils.FindObjectTypeInList(this, otherobj, typeof(Rectangle)) as Rectangle;
if (rectangle == null)
{
continue;
}
UnitPoint p = HitUtil.LinesIntersectPoint(m_p1, m_p2, rectangle.m_p1, rectangle.m_p2);
if (p != UnitPoint.Empty)
{
return(new IntersectSnapPoint(canvas, this, p));
}
}
}
return(null);
}
if (usersnaptype == typeof(MidpointSnapPoint))
{
return(new MidpointSnapPoint(canvas, this, HitUtil.LineMidpoint(m_p1, m_p2)));
}
if (usersnaptype == typeof(IntersectSnapPoint))
{
Rectangle rectangle = Utils.FindObjectTypeInList(this, otherobj, typeof(Rectangle)) as Rectangle;
if (rectangle == null)
{
return(null);
}
UnitPoint p = HitUtil.LinesIntersectPoint(m_p1, m_p2, rectangle.m_p1, rectangle.m_p2);
if (p != UnitPoint.Empty)
{
return(new IntersectSnapPoint(canvas, this, p));
}
}
if (usersnaptype == typeof(VertextSnapPoint))
{
double d1 = HitUtil.Distance(point, m_p1);
double d2 = HitUtil.Distance(point, m_p2);
if (d1 <= d2)
{
return(new VertextSnapPoint(canvas, this, m_p1));
}
return(new VertextSnapPoint(canvas, this, m_p2));
}
if (usersnaptype == typeof(NearestSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnLine(m_p1, m_p2, point);
if (p != UnitPoint.Empty)
{
return(new NearestSnapPoint(canvas, this, p));
}
}
if (usersnaptype == typeof(PerpendicularSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnLine(m_p1, m_p2, point);
if (p != UnitPoint.Empty)
{
return(new PerpendicularSnapPoint(canvas, this, p));
}
}
return(null);
}
/// <summary>
///
/// </summary>
/// <param name="canvas"></param>
/// <param name="point"></param>
/// <param name="snappoint"></param>
/// <returns></returns>
public eDrawObjectMouseDown OnMouseDown(ICanvas canvas, UnitPoint point, ISnapPoint snappoint)
{
List <IDrawObject> drawitems = canvas.DataModel.GetHitObjects(canvas, point);
List <DrawTools.Line> lines = GetLines(drawitems);
// add to source lines
if (m_originalLines.Count == 0 || Control.ModifierKeys == Keys.Shift)
{
foreach (DrawTools.Line line in lines)
{
AddLine(point, line);
}
SetSelectHint();
return(eDrawObjectMouseDown.Continue);
}
if (m_originalLines.Count == 0 || Control.ModifierKeys == Keys.Control)
{
foreach (DrawTools.Line line in lines)
{
if (m_originalLines.ContainsKey(line))
{
RemoveLine(line);
}
else
{
AddLine(point, line);
}
}
SetSelectHint();
return(eDrawObjectMouseDown.Continue);
}
if (drawitems.Count == 0)
{
return(eDrawObjectMouseDown.Continue);
}
// all lines have been added, now find edge to where to extend
if (drawitems[0] is DrawTools.Line)
{
DrawTools.Line edge = (DrawTools.Line)drawitems[0];
bool modified = false;
foreach (LinePoints originalLp in m_originalLines.Values)
{
UnitPoint intersectpoint = HitUtil.LinesIntersectPoint(edge.P1, edge.P2, originalLp.Line.P1, originalLp.Line.P2);
// lines intersect so shrink line
if (intersectpoint != UnitPoint.Empty)
{
LinePoints lp = new LinePoints();
lp.SetLine(originalLp.Line);
lp.MousePoint = originalLp.MousePoint;
m_modifiedLines.Add(lp.Line, lp);
lp.SetNewPoints(lp.Line, lp.MousePoint, intersectpoint);
modified = true;
continue;
}
// lines do not intersect, find apparent intersect point on existing edge line
if (intersectpoint == UnitPoint.Empty)
{
UnitPoint apprarentISPoint = HitUtil.FindApparentIntersectPoint(
edge.P1,
edge.P2,
originalLp.Line.P1,
originalLp.Line.P2,
false,
true);
if (apprarentISPoint == UnitPoint.Empty)
{
continue;
}
modified = true;
originalLp.Line.ExtendLineToPoint(apprarentISPoint);
LinePoints lp = new LinePoints();
lp.SetLine(originalLp.Line);
lp.MousePoint = point;
m_modifiedLines.Add(lp.Line, lp);
}
}
if (modified)
{
canvas.DataModel.AfterEditObjects(this);
}
return(eDrawObjectMouseDown.Done);
}
if (drawitems[0] is DrawTools.Arc)
{
DrawTools.Arc edge = (DrawTools.Arc)drawitems[0];
foreach (LinePoints originalLp in m_originalLines.Values)
{
}
bool modified = false;
}
return(eDrawObjectMouseDown.Done);
}
public eDrawObjectMouseDown OnMouseDown(ICanvas canvas, UnitPoint point, ISnapPoint snappoint)
{
List <IDrawObject> items = canvas.DataModel.GetHitObjects(canvas, point);
DrawTools.Line line = null;
// find first line
foreach (IDrawObject item in items)
{
if (item is DrawTools.Line)
{
line = item as DrawTools.Line;
if (line != m_l1Original.Line)
{
break;
}
}
}
if (line == null)
{
if (m_l1Original.Line == null)
{
SetHint("No line selected. Select first line");
}
else
{
SetHint("No line selected. Select second line");
}
return(eDrawObjectMouseDown.Continue);
}
if (m_l1Original.Line == null)
{
line.Highlighted = true;
m_l1Original.SetLine(line);
m_l1Original.MousePoint = point;
SetHint("Select second line");
return(eDrawObjectMouseDown.Continue);
}
if (m_l2Original.Line == null)
{
line.Highlighted = true;
m_l2Original.SetLine(line);
m_l2Original.MousePoint = point;
UnitPoint intersectpoint = HitUtil.LinesIntersectPoint(
m_l1Original.Line.P1,
m_l1Original.Line.P2,
m_l2Original.Line.P1,
m_l2Original.Line.P2);
// if lines do not intersect then extend lines to intersect point
if (intersectpoint == UnitPoint.Empty)
{
UnitPoint apprarentISPoint = HitUtil.FindApparentIntersectPoint(m_l1Original.Line.P1, m_l1Original.Line.P2, m_l2Original.Line.P1, m_l2Original.Line.P2);
if (apprarentISPoint == UnitPoint.Empty)
{
return(eDrawObjectMouseDown.Done);
}
m_l1Original.Line.ExtendLineToPoint(apprarentISPoint);
m_l2Original.Line.ExtendLineToPoint(apprarentISPoint);
m_l1NewPoint.SetLine(m_l1Original.Line);
m_l2NewPoint.SetLine(m_l2Original.Line);
canvas.DataModel.AfterEditObjects(this);
return(eDrawObjectMouseDown.Done);
}
m_l1NewPoint.SetNewPoints(m_l1Original.Line, m_l1Original.MousePoint, intersectpoint);
m_l2NewPoint.SetNewPoints(m_l2Original.Line, m_l2Original.MousePoint, intersectpoint);
canvas.DataModel.AfterEditObjects(this);
return(eDrawObjectMouseDown.Done);
}
return(eDrawObjectMouseDown.Done);
}
public ISnapPoint SnapPoint(ICanvas canvas, UnitPoint point, List <IDrawObject> otherobjs, Type[] runningsnaptypes, Type usersnaptype)
{
try
{
if (Type == LineType.Line || Type == LineType.Dote)
{
float thWidth = ThresholdWidth(canvas, Width);
if (runningsnaptypes != null)
{
foreach (Type snaptype in runningsnaptypes)
{
if (snaptype == typeof(VertextSnapPoint))
{
if (HitUtil.CircleHitPoint(m_p1, thWidth, point))
{
return(new VertextSnapPoint(canvas, this, m_p1));
}
if (HitUtil.CircleHitPoint(m_p2, thWidth, point))
{
return(new VertextSnapPoint(canvas, this, m_p2));
}
}
//if (snaptype == typeof(MidpointSnapPoint))
//{
// UnitPoint p = MidPoint(canvas, m_p1, m_p2, point);
// if (p != UnitPoint.Empty)
// return new MidpointSnapPoint(canvas, this, p);
//}
if (snaptype == typeof(IntersectSnapPoint))
{
LineTool otherline = Utiles.FindObjectTypeInList(this, otherobjs, typeof(LineTool)) as LineTool;
if (otherline == null)
{
continue;
}
UnitPoint p = HitUtil.LinesIntersectPoint(m_p1, m_p2, otherline.m_p1, otherline.m_p2);
if (p != UnitPoint.Empty)
{
return(new IntersectSnapPoint(canvas, this, p));
}
}
}
return(null);
}
//if (usersnaptype == typeof(MidpointSnapPoint))
// return new MidpointSnapPoint(canvas, this, HitUtil.LineMidpoint(m_p1, m_p2));
if (usersnaptype == typeof(IntersectSnapPoint))
{
LineTool otherline = Utiles.FindObjectTypeInList(this, otherobjs, typeof(LineTool)) as LineTool;
if (otherline == null)
{
return(null);
}
UnitPoint p = HitUtil.LinesIntersectPoint(m_p1, m_p2, otherline.m_p1, otherline.m_p2);
if (p != UnitPoint.Empty)
{
return(new IntersectSnapPoint(canvas, this, p));
}
}
if (usersnaptype == typeof(VertextSnapPoint))
{
double d1 = HitUtil.Distance(point, m_p1);
double d2 = HitUtil.Distance(point, m_p2);
if (d1 <= d2)
{
return(new VertextSnapPoint(canvas, this, m_p1));
}
return(new VertextSnapPoint(canvas, this, m_p2));
}
if (usersnaptype == typeof(NearestSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnLine(m_p1, m_p2, point);
if (p != UnitPoint.Empty)
{
return(new NearestSnapPoint(canvas, this, p));
}
}
if (usersnaptype == typeof(PerpendicularSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnLine(m_p1, m_p2, point);
if (p != UnitPoint.Empty)
{
return(new PerpendicularSnapPoint(canvas, this, p));
}
}
}
return(null);
}
catch (Exception ex)
{ throw ex; }
}
public eDrawObjectMouseDownEnum OnMouseDown(ICanvas canvas, UnitPoint point, ISnapPoint snappoint)
{
try
{
List <IDrawObject> items = canvas.DataModel.GetHitObjects(canvas, point);
DrawTools.LineTool line = null;
foreach (IDrawObject item in items)
{
if (item is DrawTools.LineTool)
{
line = item as DrawTools.LineTool;
if (line.Type == DrawTools.LineType.PointLine)
{
return(eDrawObjectMouseDownEnum.Done);
}
if (line != m_l1Original.Line)
{
break;
}
}
}
if (line == null)
{
if (m_l1Original.Line == null)
{
SetHint("请选择第一个直线");
}
else
{
SetHint("请选择第二个直线");
}
return(eDrawObjectMouseDownEnum.Continue);
}
if (m_l1Original.Line == null)
{
line.Highlighted = true;
m_l1Original.SetLine(line);
m_l1Original.MousePoint = point;
SetHint("请选择第二个直线");
return(eDrawObjectMouseDownEnum.Continue);
}
if (m_l2Original.Line == null)
{
line.Highlighted = true;
m_l2Original.SetLine(line);
m_l2Original.MousePoint = point;
UnitPoint intersectpoint = HitUtil.LinesIntersectPoint(
m_l1Original.Line.P1,
m_l1Original.Line.P2,
m_l2Original.Line.P1,
m_l2Original.Line.P2);
//如果两条实现没有相交，则将两条直线延长到交点
if (intersectpoint == UnitPoint.Empty)
{
UnitPoint apprarentISPoint = HitUtil.FindApparentIntersectPoint(m_l1Original.Line.P1, m_l1Original.Line.P2, m_l2Original.Line.P1, m_l2Original.Line.P2);
if (apprarentISPoint == UnitPoint.Empty)
{
return(eDrawObjectMouseDownEnum.Done);
}
m_l1Original.Line.ExtendLineToPoint(apprarentISPoint);
m_l2Original.Line.ExtendLineToPoint(apprarentISPoint);
m_l1NewPoint.SetLine(m_l1Original.Line);
m_l2NewPoint.SetLine(m_l2Original.Line);
canvas.DataModel.AfterEditObjects(this);
return(eDrawObjectMouseDownEnum.Done);
}
m_l1NewPoint.SetNewPoints(m_l1Original.Line, m_l1Original.MousePoint, intersectpoint);
m_l2NewPoint.SetNewPoints(m_l2Original.Line, m_l2Original.MousePoint, intersectpoint);
canvas.DataModel.AfterEditObjects(this);
return(eDrawObjectMouseDownEnum.Done);
}
return(eDrawObjectMouseDownEnum.Done);
}
catch (Exception ex)
{ throw ex; }
}
public eDrawObjectMouseDownEnum OnMouseDown(ICanvas canvas, UnitPoint point, ISnapPoint snappoint)
{
try
{
List <IDrawObject> drawitems = canvas.DataModel.GetHitObjects(canvas, point);
List <DrawTools.LineTool> lines = GetLines(drawitems);
if (m_originalLines.Count == 0 || Control.ModifierKeys == Keys.Shift)
{
foreach (DrawTools.LineTool line in lines)
{
AddLine(point, line);
}
SetSelectHint();
return(eDrawObjectMouseDownEnum.Continue);
}
if (m_originalLines.Count == 0 || Control.ModifierKeys == Keys.Control)
{
foreach (DrawTools.LineTool line in lines)
{
if (m_originalLines.ContainsKey(line))
{
RemoveLine(line);
}
else
{
AddLine(point, line);
}
}
SetSelectHint();
return(eDrawObjectMouseDownEnum.Continue);
}
if (drawitems.Count == 0)
{
return(eDrawObjectMouseDownEnum.Continue);
}
if (drawitems[0] is DrawTools.LineTool)
{
DrawTools.LineTool edge = (DrawTools.LineTool)drawitems[0];
if (edge.Type == DrawTools.LineType.PointLine)
{
return(eDrawObjectMouseDownEnum.Done);
}
bool modified = false;
foreach (LinePoints originalLp in m_originalLines.Values)
{
UnitPoint intersectpoint = HitUtil.LinesIntersectPoint(edge.P1, edge.P2, originalLp.Line.P1, originalLp.Line.P2);
if (intersectpoint != UnitPoint.Empty)
{
LinePoints lp = new LinePoints();
lp.SetLine(originalLp.Line);
lp.MousePoint = originalLp.MousePoint;
m_modifiedLines.Add(lp.Line, lp);
lp.SetNewPoints(lp.Line, lp.MousePoint, intersectpoint);
modified = true;
continue;
}
if (intersectpoint == UnitPoint.Empty)
{
UnitPoint apprarentISPoint = HitUtil.FindApparentIntersectPoint(
edge.P1,
edge.P2,
originalLp.Line.P1,
originalLp.Line.P2,
false,
true);
if (apprarentISPoint == UnitPoint.Empty)
{
continue;
}
modified = true;
originalLp.Line.ExtendLineToPoint(apprarentISPoint);
LinePoints lp = new LinePoints();
lp.SetLine(originalLp.Line);
lp.MousePoint = point;
m_modifiedLines.Add(lp.Line, lp);
}
}
if (modified)
{
canvas.DataModel.AfterEditObjects(this);
}
return(eDrawObjectMouseDownEnum.Done);
}
return(eDrawObjectMouseDownEnum.Done);
}
catch (Exception ex)
{ throw ex; }
}
