void RemoveLine(DrawTools.Line line)
{
if (m_originalLines.ContainsKey(line))
{
m_originalLines[line].Line.Highlighted = false;
m_originalLines.Remove(line);
}
}
void AddLine(UnitPoint point, DrawTools.Line line)
{
if (m_originalLines.ContainsKey(line) == false)
{
line.Highlighted = true;
LinePoints lp = new LinePoints();
lp.SetLine(line);
lp.MousePoint = point;
m_originalLines.Add(line, lp);
}
}
public void SetNewPoints(DrawTools.Line l, UnitPoint hitpoint, UnitPoint intersectpoint)
{
SetLine(l);
double hitToVp1 = HitUtil.Distance(hitpoint, l.P1); // hit point to vertex point
double ispToVp1 = HitUtil.Distance(intersectpoint, l.P1); // intersect point to vertex point
// if hit is closer than intersect point, then keep this point and adjust the other
if (hitToVp1 <= ispToVp1)
{
m_p2 = intersectpoint;
}
else
{
m_p1 = intersectpoint;
}
ResetLine();
}
/// <summary>
/// 设置新的点
/// </summary>
/// <param name="l"></param>
/// <param name="hitpoint"></param>
/// <param name="intersectpoint"></param>
public void SetNewPoints(DrawTools.Line l, UnitPoint hitpoint, UnitPoint intersectpoint)
{
SetLine(l);
double hitToVp1 = HitUtil.Distance(hitpoint, l.P1); //点击点到顶点的距离
double ispToVp1 = HitUtil.Distance(intersectpoint, l.P1); //交点到顶点的距离
// if hit is closer than intersect point, then keep this point and adjust the other
//如果点击点很靠近交点，就保持这个点然后调整其他的点
if (hitToVp1 <= ispToVp1)
{
m_p2 = intersectpoint;
}
else
{
m_p1 = intersectpoint;
}
ResetLine();
}
/// <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 void SetLine(DrawTools.Line l)
{
m_line = l;
m_p1 = l.P1;
m_p2 = l.P2;
}
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 void SetLine(DrawTools.Line l)
{
m_line = l;
m_p1 = l.P1;
m_p2 = l.P2;
}
