void RemoveLine(DrawTools.LineTool line)
{
try
{
if (m_originalLines.ContainsKey(line))
{
m_originalLines[line].Line.Highlighted = false;
m_originalLines.Remove(line);
}
}
catch (Exception ex)
{ throw ex; }
}
void AddLine(UnitPoint point, DrawTools.LineTool line)
{
try
{
if (m_originalLines.ContainsKey(line) == false)
{
line.Highlighted = true;
LinePoints lp = new LinePoints();
lp.SetLine(line);
lp.MousePoint = point;
m_originalLines.Add(line, lp);
}
}
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; }
}
