/// <summary>
/// 重置外包矩形
/// </summary>
/// <returns></returns>
public override WERectangle SetMBR()
{
double minX, maxX, minY, maxY;
minX = ((WEPoint)_Points[0]).X;
minY = ((WEPoint)_Points[0]).Y;
maxX = minX;
maxY = minY;
for (int i = 0; i < _Points.Count; i++)
{
WEPoint poi = (WEPoint)_Points[i];
if (poi.X < minX)
{
minX = poi.X;
}
if (poi.X > maxX)
{
maxX = poi.X;
}
if (poi.Y < minY)
{
minY = poi.Y;
}
if (poi.Y > maxY)
{
maxY = poi.Y;
}
}
_MBR = new WERectangle(minX, maxX, minY, maxY);
return(_MBR);
}
/// <summary>
/// 判断简单折线是否部分或者完全位于矩形盒内
/// </summary>
/// <returns></returns>
public static bool IsPolylinePartiallyWithinBox(WEPolyline polyline, WERectangle box)
{
WERectangle lineBox = polyline.MBR;
if (!IsTwoBoxesIntersect(lineBox, box)) //两外包矩形不相交
{
return(false);
}
int sPointCount = polyline.PointCount;
for (int i = 0; i < sPointCount; i++) //对折线上每个点判断是否在矩形盒内
{
if (IsPointInBox(polyline.Points[i], box))
{
return(true);
}
}
for (int j = 0; j < sPointCount - 1; j++)
{
if (IsSegmentIntersectsBox(polyline.Points[j], polyline.Points[j + 1], box)) //对折线上每一段与矩形盒求交
{
return(true);
}
}
return(false);
}
/// <summary>
/// 根据矩形盒进行选择，返回选中要素集合
/// </summary>
/// <param name="box">矩形盒</param>
/// <returns></returns>
public WEFeature[] SelectByBox(WERectangle box)
{
if (box.Width == 0 || box.Height == 0)
{
WEPoint p1 = new WEPoint((box.MinX + box.MaxX) / 2, (box.MinY + box.MaxY) / 2);
bool flag = false;
foreach (var layer in AllLayer)
{
if (flag)
{
break;
}
foreach (WEFeature fea in layer.Features)
{
if (fea.Geometries.Cover(p1))
{
_SelectedGeometries.Add(fea);
flag = true;
break;
}
}
}
return(_SelectedGeometries.ToArray());
}
else
{
List <WEFeature> selected = new List <WEFeature> {
};
foreach (WELayer lay in AllLayer)
{
selected.AddRange(lay.SelectByBox(box));
}
return(selected.ToArray());
}
}
/// <summary>
/// 缩放地图到指定的矩形区域
/// </summary>
/// <param name="newMBR"></param>
public void ZoomByMBR(WERectangle newMBR)
{
if (newMBR == null)
{
return;
}
if (newMBR.Width / newMBR.Height > WEMapTools.DisplayWidth * 1.0 / WEMapTools.DisplayHeight)
{
// 宽
double delta_y = (newMBR.Width * this.Height / this.Width - newMBR.Height) / 2.0;
newMBR = new WERectangle(newMBR.MinX, newMBR.MaxX, newMBR.MinY - delta_y, newMBR.MaxY + delta_y);
//double newMaxY = newMBR.MinY + newMBR.Width * this.Height / this.Width;
//newMBR = new WERectangle(newMBR.MinX, newMBR.MaxX, newMBR.MinY, newMaxY);
}
else
{
// 高
double delta_x = (newMBR.Height * this.Width / this.Height - newMBR.Width) / 2.0;
newMBR = new WERectangle(newMBR.MinX - delta_x, newMBR.MaxX + delta_x, newMBR.MinY, newMBR.MaxY);
//double newMaxX = newMBR.MinX + newMBR.Height * this.Width / this.Height;
//newMBR = new WERectangle(newMBR.MinX, newMaxX, newMBR.MinY, newMBR.MaxY);
}
if (newMBR != WEMapTools.DisplayMBR && DisplayScaleChanged != null)
{
DisplayScaleChanged(this);
}
WEMapTools.DisplayMBR = newMBR;
foreach (var i in AllLayer)
{
i.SelectDisplay();
}
WEMapTools.Tolerance = 0.01 * DisplayScale;
Refresh();
}
/// <summary>
/// 重置外包矩形
/// </summary>
/// <returns></returns>
public override WERectangle SetMBR()
{
double minX, maxX, minY, maxY;
minX = _Points[0].X;
minY = _Points[0].Y;
maxX = minX;
maxY = minY;
for (int i = 0; i < _Points.Count; i++)
{
if (_Points[i].X < minX)
{
minX = _Points[i].X;
}
if (_Points[i].X > maxX)
{
maxX = _Points[i].X;
}
if (_Points[i].Y < minY)
{
minY = _Points[i].Y;
}
if (_Points[i].Y > maxY)
{
maxY = _Points[i].Y;
}
}
_MBR = new WERectangle(minX, maxX, minY, maxY);
return(_MBR);
}
/// <summary>
/// 判断点是否位于矩形盒内
/// </summary>
/// <param name="point"></param>
/// <param name="rect"></param>
public static bool IsPointInBox(WEPoint point, WERectangle box, double tolerance = 0.1)
{
//点完全在矩形盒内时
if (point.X >= box.MinX && point.X <= box.MaxX && point.Y >= box.MinY && point.Y <= box.MaxY)
{
return(true);
}
if (tolerance > 0)
{
//点在一定容限内位于矩形盒边界上
WEPoint LeftTop = new WEPoint(box.MinX, box.MaxY);
WEPoint LeftBottom = new WEPoint(box.MinX, box.MinY);
WEPoint RightTop = new WEPoint(box.MaxX, box.MaxY);
WEPoint RightBottom = new WEPoint(box.MaxX, box.MinY);
if (GetDistanceFromPointToSegment(point, LeftTop, LeftBottom) < Tolerance) //左边界
{
return(true);
}
if (GetDistanceFromPointToSegment(point, RightTop, RightBottom) < Tolerance) //右边界
{
return(true);
}
if (GetDistanceFromPointToSegment(point, LeftTop, RightTop) < Tolerance) //上边界
{
return(true);
}
if (GetDistanceFromPointToSegment(point, LeftBottom, RightBottom) < Tolerance) //下边界
{
return(true);
}
}
return(false);
}
/// <summary>
/// 重置外包矩形
/// </summary>
public void SetMBR()
{
/* 重置外包矩形的简单写法
* _MBR = null;
* foreach (var i in _Features)
* _MBR += i.MBR;
*/
double minX, maxX, minY, maxY;
minX = _Features[0].MBR.MinX;
minY = _Features[0].MBR.MinY;
maxX = minX;
maxY = minY;
for (int i = 0; i < _Features.Count; i++)
{
if (_Features[i].MBR.MinX < minX)
{
minX = _Features[i].MBR.MinX;
}
if (_Features[i].MBR.MaxX > maxX)
{
maxX = _Features[i].MBR.MaxX;
}
if (_Features[i].MBR.MinY < minY)
{
minY = _Features[i].MBR.MinY;
}
if (_Features[i].MBR.MaxY > maxY)
{
maxY = _Features[i].MBR.MaxY;
}
}
_MBR = new WERectangle(minX, maxX, minY, maxY);
}
/// <summary>
/// 移动图层中的所有要素
/// </summary>
/// <param name="deltaX"></param>
/// <param name="deltaY"></param>
public void Move(double deltaX, double deltaY)
{
for (int i = 0; i < _Features.Count; i++)
{
_Features[i].Geometries.Move(deltaX, deltaY);
}
_MBR = new WERectangle(_MBR.MinX + deltaX, _MBR.MaxX + deltaX, _MBR.MinY + deltaY, _MBR.MaxY + deltaY);
}
/// <summary>
/// 移动多线
/// </summary>
/// <param name="deltaX"></param>
/// <param name="deltaY"></param>
public override void Move(double deltaX, double deltaY)
{
for (int i = 0; i < _Polylines.Count; i++)
{
_Polylines[i].Move(deltaX, deltaY);
}
_MBR = new WERectangle(_MBR.MinX + deltaX, _MBR.MaxX + deltaX, _MBR.MinY + deltaY, _MBR.MaxY + deltaY);
}
/// <summary>
/// 判断复合多边形是否部分或者完全位于矩形盒内
/// </summary>
/// <returns></returns>
public static bool IsMultiPolygonPartiallyWithinBox(WEMultiPolygon multiPolygon, WERectangle box)
{
WERectangle multipolygonBox = multiPolygon.MBR; //矩形盒不相交
if (!IsTwoBoxesIntersect(multipolygonBox, box))
{
return(false);
}
int sPolygonCount = multiPolygon.Polygons.Count();
for (int j = 0; j < sPolygonCount; j++) //遍历每个简单多边形判断是否有顶点位于矩形盒内
{
WEPolygon thisPolygon = (WEPolygon)multiPolygon.GetPolygon(j);
int sPointCount = thisPolygon.PointCount;
for (int i = 0; i < sPointCount; i++)
{
if (IsPointInBox(thisPolygon.Points[i], box))
{
return(true);
}
}
}
WEPoint LeftTop = new WEPoint(box.MinX, box.MaxY);
WEPoint LeftBottom = new WEPoint(box.MinX, box.MinY);
WEPoint RightTop = new WEPoint(box.MaxX, box.MaxY);
WEPoint RightBottom = new WEPoint(box.MaxX, box.MinY);
//判断矩形盒是否有顶点位于复合多边形内
if (IsPointInMultiPolygon(LeftTop, multiPolygon) || IsPointInMultiPolygon(LeftBottom, multiPolygon) ||
IsPointInMultiPolygon(RightBottom, multiPolygon) || IsPointInMultiPolygon(RightTop, multiPolygon))
{
return(true);
}
for (int j = 0; j < sPolygonCount; j++) //遍历每个简单多边形判断是否有边与矩形盒相交
{
WEPolygon thisPolygon = (WEPolygon)multiPolygon.GetPolygon(j);
int sPointCount = thisPolygon.PointCount;
WEPoint startPoint, endPoint;
for (int i = 0; i < sPointCount - 1; i++)
{
startPoint = thisPolygon.Points[i];
endPoint = thisPolygon.Points[i + 1];
if (IsSegmentIntersectsBox(startPoint, endPoint, box))
{
return(true);
}
}
startPoint = thisPolygon.Points[sPointCount - 1];
endPoint = thisPolygon.Points[0];
if (IsSegmentIntersectsBox(startPoint, endPoint, box))
{
return(true);
}
}
return(false);
}
/// <summary>
/// 判断点是否在简单多边形内
/// </summary>
/// <param name="point"></param>
/// <param name="polygon"></param>
/// <returns></returns>
public static bool IsPointInPolygon(WEPoint point, WEPolygon polygon, double tolerance = 0.1)
{
WERectangle box = polygon.MBR;
if (!IsPointInBox(point, box))
{
return(false);
}
int sPointCount = polygon.PointCount;
int sIntersectionCount = 0; //射线与边的交点数
WEPoint startPoint, endPoint; //线段起点、终点
for (int i = 0; i < sPointCount - 1; i++)
{
startPoint = polygon.Points[i];
endPoint = polygon.Points[i + 1];
if (IsRayIntersectsSegment(point, startPoint, endPoint))
{
sIntersectionCount++;
}
}
startPoint = polygon.Points[sPointCount - 1];
endPoint = polygon.Points[0];
if (IsRayIntersectsSegment(point, startPoint, endPoint)) //最后一条边
{
sIntersectionCount++;
}
if (sIntersectionCount % 2 == 1) //奇数个交点
{
return(true);
}
if (tolerance > 0)
{
//对每条边判断点是否在一定容限内位于边上
for (int i = 0; i < sPointCount - 1; i++)
{
startPoint = polygon.Points[i];
endPoint = polygon.Points[i + 1];
if (GetDistanceFromPointToSegment(point, startPoint, endPoint) <= Tolerance)
{
return(true);
}
}
startPoint = polygon.Points[sPointCount - 1];
endPoint = polygon.Points[0];
if (GetDistanceFromPointToSegment(point, startPoint, endPoint) < Tolerance)
{
return(true);
}
}
return(false);
}
/// <summary>
/// 缩放至全图
/// </summary>
public void FullExitence()
{
if (AllLayer.Count == 0)
{
return;
}
WERectangle newRect = AllLayer[0].MBR;
foreach (var i in AllLayer)
{
newRect += i.MBR;
}
ZoomByMBR(newRect);
}
/// <summary>
/// 判断简单多边形是否部分或者完全位于矩形盒内
/// </summary>
/// <returns></returns>
public static bool IsPolygonPartiallyWithinBox(WEPolygon polygon, WERectangle box)
{
WERectangle polygonBox = polygon.MBR;
if (!IsTwoBoxesIntersect(polygonBox, box)) //矩形盒不相交
{
return(false);
}
int sPointCount = polygon.PointCount;
for (int i = 0; i < sPointCount; i++) //多边形是否有顶点位于矩形盒内
{
if (IsPointInBox(polygon.Points[i], box))
{
return(true);
}
}
WEPoint LeftTop = new WEPoint(box.MinX, box.MaxY);
WEPoint LeftBottom = new WEPoint(box.MinX, box.MinY);
WEPoint RightTop = new WEPoint(box.MaxX, box.MaxY);
WEPoint RightBottom = new WEPoint(box.MaxX, box.MinY);
if (IsPointInPolygon(LeftTop, polygon) || IsPointInPolygon(LeftBottom, polygon) ||
IsPointInPolygon(RightTop, polygon) || IsPointInPolygon(RightBottom, polygon)) //矩形盒是否有顶点位于多边形内
{
return(true);
}
//简单多边形与矩形盒的边是否有交点
WEPoint startPoint, endPoint;
for (int i = 0; i < sPointCount - 1; i++)
{
startPoint = polygon.Points[i];
endPoint = polygon.Points[i + 1];
if (IsSegmentIntersectsBox(startPoint, endPoint, box))
{
return(true);
}
}
startPoint = polygon.Points[sPointCount - 1]; //最后一条边
endPoint = polygon.Points[0];
if (IsSegmentIntersectsBox(startPoint, endPoint, box))
{
return(true);
}
return(false);
}
/// <summary>
/// 判断多点是否部分或完全位于矩形盒内
/// </summary>
/// <param name="multiPoint"></param>
/// <param name="box"></param>
/// <returns></returns>
public static bool IsMultiPointPartiallyWithinBox(WEMultiPoint multiPoint, WERectangle box)
{
WERectangle pointsBox = multiPoint.MBR;
if (!IsTwoBoxesIntersect(pointsBox, box))
{
return(false);
}
int sPointCount = multiPoint.PointCount;
for (int i = 0; i < sPointCount; i++)
{
if (IsPointInBox((WEPoint)multiPoint.GetPoint(i), box)) //某一个点位于矩形盒内即可
{
return(true);
}
}
return(false);
}
/// <summary>
/// 判断点是否选中多线
/// </summary>
/// <param name="point"></param>
/// <param name="polyline"></param>
/// <returns></returns>
public static bool IsPointOnMultiPolyline(WEPoint point, WEMultiPolyline multipolyline)
{
WERectangle box = multipolyline.MBR;
if (!IsPointInBox(point, box))
{
return(false);
}
int sPolylineCount = multipolyline.Polylines.Count();
for (int i = 0; i < sPolylineCount; i++)
{
if (IsPointOnPolyline(point, (WEPolyline)multipolyline.Polylines[i]))
{
return(true);
}
}
return(false);
}
/// <summary>
/// 判断复合折线是否部分或者完全位于矩形盒内
/// </summary>
/// <returns></returns>
public static bool IsMultiPolylinePartiallyWithinBox(WEMultiPolyline multiPolyline, WERectangle box)
{
WERectangle multiPolylineBox = multiPolyline.MBR;
if (!IsTwoBoxesIntersect(multiPolylineBox, box))
{
return(false);
}
int sPolylineCount = multiPolyline.Polylines.Count();
for (int i = 0; i < sPolylineCount; i++)
{
if (IsPolylinePartiallyWithinBox((WEPolyline)multiPolyline.Polylines[i], box))
{
return(true);
}
}
return(false);
}
/// <summary>
/// 判断点是否在复合多边形内
/// </summary>
/// <param name="point"></param>
/// <param name="multiPolygon"></param>
/// <returns></returns>
public static bool IsPointInMultiPolygon(WEPoint point, WEMultiPolygon multiPolygon)
{
WERectangle box = multiPolygon.MBR;
if (!IsPointInBox(point, box))
{
return(false);
}
int sPolygonCount = multiPolygon.Polygons.Count();
int sIntersectionCount = 0; //射线与边的交点数
for (int j = 0; j < sPolygonCount; j++) //遍历每个简单多边形求射线交点个数
{
WEPolygon thisPolygon = (WEPolygon)multiPolygon.GetPolygon(j);
if (thisPolygon.PointCount < 3)
{
continue;
}
int sPointCount = thisPolygon.PointCount;
WEPoint startPoint, endPoint; //线段起点、终点
for (int i = 0; i < sPointCount - 1; i++)
{
startPoint = thisPolygon.Points[i];
endPoint = thisPolygon.Points[i + 1];
if (IsRayIntersectsSegment(point, startPoint, endPoint))
{
sIntersectionCount++;
}
}
startPoint = thisPolygon.Points[sPointCount - 1];
endPoint = thisPolygon.Points[0];
if (IsRayIntersectsSegment(point, startPoint, endPoint)) //最后一条边
{
sIntersectionCount++;
}
}
if (sIntersectionCount % 2 == 1) //奇数个交点
{
return(true);
}
return(false);
}
/// <summary>
/// 判断图层里的点是否在矩形盒内并返回部分在矩形盒内的结果
/// </summary>
/// <param name="box"></param>
/// <returns></returns>
public override WEFeature[] SelectByBox(WERectangle box)
{
List <WEFeature> result = new List <WEFeature> {
};
switch (_FeatureType)
{
case FeatureType.WEEntityPoint:
foreach (var i in _Features)
{
if (WEMapTools.IsMultiPointPartiallyWithinBox((WEMultiPoint)i.Geometries, box))
{
result.Add(i);
}
}
break;
//case FeatureType.WEEntityPolyline:
case FeatureType.WEMultiPolyline:
foreach (var i in _Features)
{
if (WEMapTools.IsMultiPolylinePartiallyWithinBox((WEMultiPolyline)i.Geometries, box))
{
result.Add(i);
}
}
break;
//case FeatureType.WEEntityPolygon:
case FeatureType.WEMultiPolygon:
foreach (var i in _Features)
{
if (WEMapTools.IsMultiPolygonPartiallyWithinBox((WEMultiPolygon)i.Geometries, box))
{
result.Add(i);
}
}
break;
}
return(result.ToArray());
}
/// <summary>
/// 判断点在容限内是否在线上
/// </summary>
/// <param name="point"></param>
/// <param name="polyline"></param>
/// <returns></returns>
public static bool IsPointOnPolyline(WEPoint point, WEPolyline polyline)
{
WERectangle box = polyline.MBR;
if (!IsPointInBox(point, box)) //若点不在线外包矩形内，无需继续计算
{
return(false);
}
int sPointCount = polyline.PointCount;
for (int i = 0; i < sPointCount - 1; i++)
{
WEPoint sPoint = polyline.Points[i];
WEPoint ePoint = polyline.Points[i + 1];
double thisDis = GetDistanceFromPointToSegment(point, sPoint, ePoint);
if (thisDis < Tolerance) //点到一段线段的距离小于容限即可
{
return(true);
}
}
return(false);
}
/// <summary>
/// 判断两个矩形盒是否相交
/// </summary>
/// <param name="box1"></param>
/// <param name="box2"></param>
/// <returns></returns>
public static bool IsTwoBoxesIntersect(WERectangle box1, WERectangle box2)
{
double MaxX1, MinX1, MaxY1, MinY1;
double MaxX2, MinX2, MaxY2, MinY2;
MaxX1 = box1.MaxX;
MinX1 = box1.MinX;
MaxY1 = box1.MaxY;
MinY1 = box1.MinY;
MaxX2 = box2.MaxX;
MinX2 = box2.MinX;
MaxY2 = box2.MaxY;
MinY2 = box2.MinY;
if (MinY1 > MaxY2 || MinY2 > MaxY1 || MinX1 > MaxX2 || MinX2 > MaxX1)
{
return(false);
}
else
{
return(true);
}
}
public WELayer(string filePath, FeatureType layerType = FeatureType.WENULL)
{
string fileType = filePath.Split('.').Last();
if (fileType == "shp")
{
WELayer newLayer = WEIO.ReadLayer(filePath);
this._ID = newLayer.ID;
this._LayerName = newLayer.LayerName;
this._FileName = filePath;
this._Description = newLayer.Description;
this._FeatureType = newLayer.FeatureType;
this._LayerStyle = newLayer.SymbolStyle;
this._MBR = newLayer._MBR;
this._Visible = true;
this._Selectable = true;
}
else if (fileType == "tif")
{
;
}
}
//鼠标移动
private void WEMapControl_MouseMove(object sender, MouseEventArgs e)
{
if (WEMouseMove != null)
{
WEMouseMove(this, e.Location);
}
switch (MapOpStyle)
{
case 0:
break;
case 1: //放大
if (e.Button == MouseButtons.Left)
{
Refresh();
Graphics g = Graphics.FromHwnd(this.Handle);
Pen sBoxPen = new Pen(mcSelectingBoxColor, mcSelectingBoxWidth);
float sMinX = Math.Min(mStartPoint.X, e.Location.X);
float sMinY = Math.Min(mStartPoint.Y, e.Location.Y);
float sMaxX = Math.Max(mStartPoint.X, e.Location.X);
float sMaxY = Math.Max(mStartPoint.Y, e.Location.Y);
g.DrawRectangle(sBoxPen, sMinX, sMinY, sMaxX - sMinX, sMaxY - sMinY);
g.Dispose();
}
break;
case 2: //缩小
if (e.Button == MouseButtons.Left)
{
Refresh();
Graphics g = Graphics.FromHwnd(this.Handle);
Pen sBoxPen = new Pen(mcSelectingBoxColor, mcSelectingBoxWidth);
float sMinX = Math.Min(mStartPoint.X, e.Location.X);
float sMinY = Math.Min(mStartPoint.Y, e.Location.Y);
float sMaxX = Math.Max(mStartPoint.X, e.Location.X);
float sMaxY = Math.Max(mStartPoint.Y, e.Location.Y);
g.DrawRectangle(sBoxPen, sMinX, sMinY, sMaxX - sMinX, sMaxY - sMinY);
g.Dispose();
}
break;
case 3: //漫游
if (e.Button == MouseButtons.Left)
{
//PointF sPreMouseLocation = new PointF(mStartPoint.X, mStartPoint.Y);
//WEPoint sPrePoint = WEMapTools.ToMapPoint(sPreMouseLocation);
WEPoint sPrePoint = WEMapTools.ToMapPoint(mStartPoint);
//PointF sCurMouseLocation = new PointF(e.Location.X, e.Location.Y);
//WEPoint sCurPoint = WEMapTools.ToMapPoint(sCurMouseLocation);
WEPoint sCurPoint = WEMapTools.ToMapPoint(e.Location);
WEPoint offset = WEMapTools.ToMapPoint(new PointF(e.Location.X - mStartPoint.X, e.Location.Y - mStartPoint.Y));
//修改offset
double mOffsetX = sPrePoint.X - sCurPoint.X;
double mOffsetY = sPrePoint.Y - sCurPoint.Y;
WERectangle newRect = new WERectangle(WEMapTools.DisplayMBR.MinX + mOffsetX, WEMapTools.DisplayMBR.MaxX + mOffsetX,
WEMapTools.DisplayMBR.MinY + mOffsetY, WEMapTools.DisplayMBR.MaxY + mOffsetY);
WEMapTools.DisplayMBR = newRect;
ZoomByMBR(WEMapTools.DisplayMBR);
mStartPoint = e.Location;
/*
* //修改offset
* mOffsetX = (mStartPoint.X - e.Location.X) * WEMapTools.DisplayMBR.Width / WEMapTools.DisplayWidth;
* mOffsetY = (e.Location.Y - mStartPoint.Y) * WEMapTools.DisplayMBR.Height / WEMapTools.DisplayHeight;
* newRect = new WERectangle(WEMapTools.DisplayMBR.MinX + mOffsetX, WEMapTools.DisplayMBR.MaxX + mOffsetX,
* WEMapTools.DisplayMBR.MinY + mOffsetY, WEMapTools.DisplayMBR.MaxY + mOffsetY);
* WEMapTools.DisplayMBR = newRect;
* ZoomByMBR(WEMapTools.DisplayMBR);
* mStartPoint.X = e.Location.X;
* mStartPoint.Y = e.Location.Y;
*/
}
break;
case 4:
mStartPoint = e.Location;
List <WEPoint> tem = new List <WEPoint>();
if (CurrentEdit < 0 || CurrentEdit > AllLayer.Count())
{
break;
}
if (NodeEdit == 0)
{
switch (AllLayer[CurrentEdit].FeatureType)
{
case FeatureType.WEMultiPoint:
case FeatureType.WEEntityPoint:
if (NewPoints.Count() != 0)
{
NewPoints[0] = e.Location;
EditFeature.Geometries = new WEMultiPoint(new WEPoint[1] {
WEMapTools.ToMapPoint(NewPoints[0])
});
}
else
{
NewPoints.Add(e.Location);
}
//NewPoints.Clear();
//EditFeature = AllLayer[CurrentEdit].Features.Last();
//AllLayer[CurrentEdit].Features[AllLayer[CurrentEdit].Features.Count() - 1].Geometries = new WEMultiPoint(new WEGeometry[1] { });
break;
case FeatureType.WEEntityPolyline:
case FeatureType.WEMultiPolyline:
NewPoints.Add(e.Location);
WEMultiPolyline temm = (WEMultiPolyline)(EditFeature.Geometries);
WEPolyline temmm = (WEPolyline)temm.Polylines[temm.Polylines.Count() - 1];
//tem.AddRange(temmm.Points);
foreach (var i in NewPoints)
{
tem.Add(WEMapTools.ToMapPoint(i));
}
temmm.Points = (WEPoint[])tem.ToArray();
temm.DeletePolyline(temm.Polylines.Count() - 1);
temm.Add(temmm);
EditFeature.Geometries = temm;
NewPoints.RemoveAt(NewPoints.Count - 1);
break;
case FeatureType.WEEntityPolygon:
case FeatureType.WEMultiPolygon:
NewPoints.Add(e.Location);
WEMultiPolygon temm3 = (WEMultiPolygon)(EditFeature.Geometries);
WEPolygon temmm3 = (WEPolygon)temm3.Polygons[temm3.Polygons.Count() - 1];
//tem.AddRange(temmm3.Points);
foreach (var i in NewPoints)
{
tem.Add(WEMapTools.ToMapPoint(i));
}
temmm3.Points = (WEPoint[])tem.ToArray();
temm3.DeletePolygon(temm3.Polygons.Count() - 1);
temm3.Add(temmm3);
EditFeature.Geometries = temm3;
NewPoints.RemoveAt(NewPoints.Count - 1);
break;
}
Refresh();
}
else if (EditFeature.Geometries.PointCount != 0)
{
CursorMap = WEMapTools.ToMapPoint(e.Location);
switch (EditFeature.FeatureType)
{
case FeatureType.WEMultiPoint:
case FeatureType.WEEntityPoint:
isGravitationCaptured = -1;
for (int i = 0; i < EditFeature.Geometries.PointCount; i++)
{
WEPoint poi = (WEPoint)((WEMultiPoint)EditFeature.Geometries).Points[i];
if (WEMapTools.IsPointOnPoint(CursorMap, poi))
{
isGravitationCaptured = i;
break;
}
}
break;
case FeatureType.WEEntityPolyline:
case FeatureType.WEMultiPolyline:
isGravitationCaptured = -1;
for (int i = 0; i < EditFeature.Geometries.PointCount; i++)
{
WEPolyline polyline = (WEPolyline)((WEMultiPolyline)EditFeature.Geometries).Polylines[i];
for (int j = 0; j < polyline.PointCount; j++)
{
if (WEMapTools.IsPointOnPoint(CursorMap, polyline.Points[j]))
{
isGravitationCaptured = j;
break;
}
}
if (isGravitationCaptured != -1)
{
helpGravitationCaptured = i;
break;
}
if (polyline.PointCount == 1)
{
continue;
}
for (int j = 1; j < polyline.PointCount; j++)
{
if (WEMapTools.IsPointOnPolyline(CursorMap, new WEPolyline(new WEPoint[2] {
polyline.Points[j], polyline.Points[j - 1]
})))
{
;
}
{
isGravitationCaptured = j;
break;
}
}
if (isGravitationCaptured != -1)
{
helpGravitationCaptured = -i;
break;
}
}
break;
case FeatureType.WEEntityPolygon:
case FeatureType.WEMultiPolygon:
isGravitationCaptured = -1;
for (int i = 0; i < EditFeature.Geometries.PointCount; i++)
{
WEPolygon polygon = (WEPolygon)((WEMultiPolyline)EditFeature.Geometries).Polylines[i];
for (int j = 0; j < polygon.PointCount; j++)
{
if (WEMapTools.IsPointOnPoint(CursorMap, polygon.Points[j]))
{
isGravitationCaptured = j;
break;
}
}
if (isGravitationCaptured != -1)
{
helpGravitationCaptured = i;
break;
}
if (polygon.PointCount == 1)
{
continue;
}
for (int j = 1; j < polygon.PointCount; j++)
{
if (WEMapTools.IsPointOnPolyline(CursorMap, new WEPolyline(new WEPoint[2] {
polygon.Points[j], polygon.Points[j - 1]
})))
{
;
}
{
isGravitationCaptured = j;
break;
}
}
if (WEMapTools.IsPointOnPolyline(CursorMap, new WEPolyline(new WEPoint[2] {
polygon.Points.Last(), polygon.Points.First()
})))
{
;
}
isGravitationCaptured = polygon.PointCount;
if (isGravitationCaptured != -1)
{
helpGravitationCaptured = -i;
break;
}
}
break;
default:
isGravitationCaptured = -1;
break;
}
if (isGravitationCaptured != -1)
{
Cursor = Cursors.SizeAll;
using (Graphics g = Graphics.FromHwnd(this.Handle))
{
g.FillRectangle(new SolidBrush(Color.Black), 0, 0, 100, 100);
}
}
else
{
Cursor = Cursors.Cross;
}
}
if (isGravitationCaptured != -1)
{
}
break;
case 5: //选择要素
if (e.Button == MouseButtons.Left)
{
Refresh();
Graphics g = Graphics.FromHwnd(this.Handle);
Pen sBoxPen = new Pen(mcSelectingBoxColor, mcSelectingBoxWidth);
float sMinX = Math.Min(mStartPoint.X, e.Location.X);
float sMinY = Math.Min(mStartPoint.Y, e.Location.Y);
float sMaxX = Math.Max(mStartPoint.X, e.Location.X);
float sMaxY = Math.Max(mStartPoint.Y, e.Location.Y);
g.DrawRectangle(sBoxPen, sMinX, sMinY, sMaxX - sMinX, sMaxY - sMinY);
g.Dispose();
}
break;
default:
mStartPoint = e.Location;
break;
}
}
/// <summary>
/// 判断一条线段是否和矩形盒相交
/// </summary>
/// <returns></returns>
public static bool IsSegmentIntersectsBox(WEPoint startPoint, WEPoint endPoint, WERectangle box)
{
if (startPoint.X < box.MinX && endPoint.X < box.MinX) //线段在矩形盒左边的外侧
{
return(false);
}
if (startPoint.X > box.MaxX && endPoint.X > box.MaxX) //线段在矩形盒右边的外侧
{
return(false);
}
if (startPoint.Y < box.MinY && endPoint.Y < box.MinY) //线段在矩形盒下边的外侧
{
return(false);
}
if (startPoint.Y > box.MaxY && endPoint.Y > box.MaxY) //线段在矩形盒上边的外侧
{
return(false);
}
WEPoint LeftTop = new WEPoint(box.MinX, box.MaxY);
WEPoint LeftBottom = new WEPoint(box.MinX, box.MinY);
WEPoint RightTop = new WEPoint(box.MaxX, box.MaxY);
WEPoint RightBottom = new WEPoint(box.MaxX, box.MinY);
if (IsTwoSegmentsIntersect(startPoint, endPoint, LeftBottom, LeftTop)) //线段与矩形盒左边界求交
{
return(true);
}
if (IsTwoSegmentsIntersect(startPoint, endPoint, RightBottom, RightTop)) //线段与矩形盒右边界求交
{
return(true);
}
if (IsTwoSegmentsIntersect(startPoint, endPoint, RightTop, LeftTop)) //线段与矩形盒上边界求交
{
return(true);
}
if (IsTwoSegmentsIntersect(startPoint, endPoint, LeftBottom, RightBottom)) //线段与矩形盒下边界求交
{
return(true);
}
return(false);
}
/// <summary>
/// 获取外包矩形
/// </summary>
public override WERectangle SetMBR()
{
_MBR = new WERectangle(_X - WEMapTools.Tolerance, _X + WEMapTools.Tolerance, _Y - WEMapTools.Tolerance, _Y + WEMapTools.Tolerance);
return(_MBR);
}
public virtual WEFeature[] SelectByBox(WERectangle box)
{
throw new Exception("不能直接对未定义的对象进行选择.");
}