/// <summary>
/// 多选操作
/// </summary>
/// <param name="start"></param>
/// <param name="end"></param>
/// <returns></returns>
public List <IntersectGeometry> MuiltSelect(Vector2D start, Vector2D end)
{
List <IntersectGeometry> selects = new List <IntersectGeometry>();
List <Geometry2D> sgs = this.DrawingControl.GetDrawingVisuals();
Vector2D v1 = start;
Vector2D v3 = end;
Vector2D v2 = Vector2D.Create(v3.X, v1.Y);
Vector2D v4 = Vector2D.Create(v1.X, v3.Y);
Line2D l1 = Line2D.Create(v1, v2);
Line2D l2 = Line2D.Create(v2, v3);
Line2D l3 = Line2D.Create(v3, v4);
Line2D l4 = Line2D.Create(v4, v1);
List <Line2D> region = new List <Line2D>()
{
l1, l2, l3, l4
};
//下拉
if (v1.X < v3.X)
{
for (int i = 0; i < sgs.Count; i++)
{
//必须所有的线都在选中框内部
List <Line2D> lines = sgs[i].Lines;
bool isInRegion = false;
if (lines != null)
{
for (int j = 0; j < lines.Count; j++)
{
isInRegion = true;
if (!lines[j].IsInRegion(region))
{
isInRegion = false;
break;
}
}
}
else
{
if (sgs[i] is CircleGeometry)
{
var circle = sgs[i] as CircleGeometry;
//当前中心点在矩形区域之内
if (circle.Start.IsInRegion(region))
{
isInRegion = true;
}
for (int j = 0; j < region.Count; j++)
{
if (circle.Start.DistanceTo(region[j]) < circle.Radius)
{
isInRegion = false;
}
}
}
}
if (isInRegion)
{
IntersectGeometry ig = new IntersectGeometry();
ig.GeometryShape = sgs[i];
selects.Add(ig);
}
}
}
else
{
for (int i = 0; i < sgs.Count; i++)
{
//主要部分在其中，则选中
List <Line2D> lines = sgs[i].Lines;
bool isInRegion = false;
if (lines != null)
{
for (int j = 0; j < lines.Count; j++)
{
if (lines[j].IsInRegion(region) || lines[j].IsPartInRegion(region))
{
isInRegion = true;
break;
}
}
}
else
{
if (sgs[i] is CircleGeometry)
{
var circle = sgs[i] as CircleGeometry;
for (int j = 0; j < region.Count; j++)
{
if (circle.Start.DistanceTo(region[j]) < circle.Radius)
{
isInRegion = true;
}
}
}
if (sgs[i] is Geometries.Primitives.EllipseGeometry)
{
}
}
if (isInRegion)
{
IntersectGeometry ig = new IntersectGeometry();
ig.GeometryShape = sgs[i];
selects.Add(ig);
}
}
}
return(selects);
}
/// <summary>
/// 开始单选
/// </summary>
/// <param name="v"></param>
/// <returns></returns>
public List <IntersectGeometry> SingleSelect(Vector2D v)
{
//选择的所有图形元素
List <IntersectGeometry> selectIGS = new List <IntersectGeometry>();
//获取图形上所有的元素
List <Geometry2D> gss = this.DrawingControl.GetDrawingVisuals().FindAll(x => x.IsEnabled);
//当相交的图形
List <IntersectGeometry> shapeSelects = new List <IntersectGeometry>();
//循环所有的图形元素
for (int i = 0; i < gss.Count; i++)
{
//获取满足相交运算的所有图形
IntersectPoint ip = gss[i].IntersectPoint(v);
if (ip != null)
{
IntersectGeometry igip = new IntersectGeometry();
igip.IntersectPoint = ip;
igip.GeometryShape = gss[i];
shapeSelects.Add(igip);
}
}
//查找一个离点击点最近的图形
if (shapeSelects.Count > 0)
{
//查找一个最近的图形
var selectShape = shapeSelects.OrderBy(x => x.IntersectPoint.Point.Distance(v)).FirstOrDefault();
//查找具有相同距离的图形
List <IntersectGeometry> igs = shapeSelects.FindAll(x => x.IntersectPoint.Point.Distance(v).AreEqual(selectShape.IntersectPoint.Point.Distance(v)));
if (igs.Count == 1)
{
selectIGS.Add(selectShape);
return(selectIGS);
}
else
{
/**需要判断，当前选择点是否在图形内部，假如直接命中了图形获取选择的点*/
Point point = KernelProperty.MMToPix(v);
var hittestShapes = DrawingControl.CatchVisual(point).FindAll(x => x.IsEnabled);
if (hittestShapes != null && hittestShapes.Count > 0)
{
//假如有多个命中，则要在命中中分离，也有相交关系的图形
List <IntersectGeometry> csigs = new List <IntersectGeometry>();
hittestShapes.ForEach(x =>
{
IntersectGeometry ig = igs.Find(y => y.GeometryShape == x);
if (ig != null)
{
csigs.Add(ig);
}
});
//假如有相交元素中，没有一个被命中，说明当前点没有命中任何相交元素，则还是选择弹出选择
if (csigs != null && csigs.Count > 0)
{
//多个命中，多个选择
return(csigs);
}
else
{
//弹出选择
return(igs);
}
}
else
{
//弹出选择
return(igs);
}
}
}
else
{
//获取选择的点
Point point = KernelProperty.MMToPix(v);
//假如直接命中了图形
var selectedShapes = DrawingControl.CatchVisual(point).FindAll(x => x.IsEnabled);
if (selectedShapes != null && selectedShapes.Count > 0)
{
List <IntersectGeometry> csigs = new List <IntersectGeometry>();
selectedShapes.ForEach(x =>
{
IntersectGeometry igip = new IntersectGeometry();
IntersectPoint ip = new IntersectPoint();
ip.Point = v;
igip.IntersectPoint = ip;
igip.GeometryShape = x;
csigs.Add(igip);
});
return(csigs);
}
else
{
return(selectIGS);
}
}
}
