/// <summary>
/// 求线段长度的中点
/// </summary>
/// <returns></returns>
public override WEPoint[] getCenterPoint()
{
WEPoint center = new WEPoint();
double length = 0;
for (int i = 0; i < _Points.Count - 1; i++) //获取polyline全长
{
length += WEMapTools.GetDistance(_Points[i], _Points[i + 1]);
}
double calLength = 0;
for (int i = 0; i < _Points.Count - 1; i++)
{
calLength += WEMapTools.GetDistance(_Points[i], _Points[i + 1]);
if (calLength >= length / 2) //长度中点在当前段
{
double thisLength = WEMapTools.GetDistance(_Points[i], _Points[i + 1]);
double diffLength = calLength - thisLength;
center.X = (_Points[i + 1].X - _Points[i].X) * diffLength / thisLength + _Points[i].X;
center.Y = (_Points[i + 1].Y - _Points[i].Y) * diffLength / thisLength + _Points[i].Y;
break;
}
}
return(new WEPoint[1] {
center
});
}
/// <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>
/// 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>
/// 判断一条水平向右的射线与指定线段是否相交
/// </summary>
/// <returns></returns>
public static bool IsRayIntersectsSegment(WEPoint point, WEPoint startPoint, WEPoint endPoint)
{
if (startPoint.Y == endPoint.Y) //排除射线与线段重合或平行的情况
{
return(false);
}
if (startPoint.Y > point.Y && endPoint.Y > point.Y) //线段完全位于射线上方
{
return(false);
}
if (startPoint.Y < point.Y && endPoint.Y < point.Y) //线段完全位于射线下方
{
return(false);
}
if (startPoint.Y == point.Y && endPoint.Y > point.Y) //交点为下端点
{
return(false);
}
if (endPoint.Y == point.Y && startPoint.Y > point.Y) //交点为下端点
{
return(false);
}
if (startPoint.X < point.X && endPoint.X < point.X) //线段完全在射线左侧
{
return(false);
}
double x = endPoint.X - (endPoint.X - startPoint.X) * (endPoint.Y - point.Y)
/ (endPoint.Y - startPoint.Y); //计算交点横坐标
if (x < point.X) //交点在射线起点左侧
{
return(false);
}
return(true);
}
/// <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>
/// 获取一个点到一条线段的最短距离
/// </summary>
/// <param name="point"></param>
/// <param name="polyline"></param>
/// <returns></returns>
public static double GetDistanceFromPointToSegment(WEPoint point, WEPoint startPoint, WEPoint endPoint)
{
double length = GetDistance(startPoint, endPoint);
if (startPoint.Equals(endPoint)) //若线段首尾点重合
{
return(length);
}
else
{
double dot = (point.X - startPoint.X) * (endPoint.X - startPoint.X) +
(point.Y - startPoint.Y) * (endPoint.Y - startPoint.Y); //计算点积
double d = dot / (length * length);
if (d < 0) //最近点取线段起点
{
return(GetDistance(point, startPoint));
}
else if (d > 1) //最近点取线段终点
{
return(GetDistance(point, endPoint));
}
else
{
double Xd = startPoint.X + d * (endPoint.X - startPoint.X);
double Yd = startPoint.Y + d * (endPoint.Y - startPoint.Y);
WEPoint D = new WEPoint(Xd, Yd); //最近点取垂足点
return(GetDistance(point, D));
}
}
}
/// <summary>
/// 将屏幕坐标转换为地图坐标
/// </summary>
/// <param name="point"></param>
/// <returns></returns>
public static WEPoint ToMapPoint(PointF point)
{
WEPoint sPoint = new WEPoint();
sPoint.X = DisplayMBR.MinX + point.X * DisplayMBR.Width / DisplayWidth;
sPoint.Y = DisplayMBR.MaxY - point.Y * DisplayMBR.Height / DisplayHeight;
return(sPoint);
}
public override WEPoint[] getCenterPoint()
{
WEPoint center = new WEPoint(_X, _Y);
return(new WEPoint[1] {
center
});
}
public virtual WEPoint[] getCenterPoint()
{
WEPoint center = new WEPoint();
return(new WEPoint[1] {
center
});
}
/// <summary>
/// 将地图坐标转换为屏幕坐标
/// </summary>
/// <param name="point"></param>
/// <returns></returns>
public static PointF FromMapPoint(WEPoint point)
{
PointF sPoint = new PointF();
sPoint.X = (float)((point.X - DisplayMBR.MinX) * DisplayWidth / DisplayMBR.Width);
sPoint.Y = (float)((DisplayMBR.MaxY - point.Y) * DisplayHeight / DisplayMBR.Height);
return(sPoint);
}
/// <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>
/// 根据提供的中心和缩放级别进行缩放
/// </summary>
/// <param name="center">缩放的屏幕中心</param>
/// <param name="ratio">缩放的比例，大于 1 放大，小于 1 缩小</param>
public void ZoomByCenter(PointF center, double ratio = 1.2)
{
PointF poimin = new PointF(center.X * (float)(ratio - 1), center.Y * (float)(ratio - 1)); // 0,0
PointF poimax = new PointF(WEMapTools.DisplayWidth - (WEMapTools.DisplayWidth - center.X) * (float)(ratio - 1), WEMapTools.DisplayHeight - (WEMapTools.DisplayHeight - center.Y) * (float)(ratio - 1)); // width, height
//PointF poimin = new PointF(center.X * (float)(ratio - 1), center.Y * (float)(ratio - 1));// 0,0
//PointF poimax = new PointF(Width - center.X * (float)(ratio - 1), Height - center.Y * (float)(ratio - 1));// width, height
WEPoint p1 = WEMapTools.ToMapPoint(poimin), p2 = WEMapTools.ToMapPoint(poimax);
ZoomByMBR(new WERectangle(p1.X, p2.X, p2.Y, p1.Y));
}
/// <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>
/// 判断两点在容限内是否重合
/// </summary>
/// <param name="Point1"></param>
/// <param name="Point2"></param>
/// <returns></returns>
public static bool IsPointOnPoint(WEPoint Point1, WEPoint Point2)
{
double Dis = GetDistance(Point1, Point2);
if (Dis <= Tolerance)
{
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// 判断两条线段是否相交
/// </summary>
/// <returns></returns>
public static bool IsTwoSegmentsIntersect(WEPoint startPoint1, WEPoint endPoint1, WEPoint startPoint2, WEPoint endPoint2)
{
//使用向量叉积的方法
double cross1 = (endPoint1.X - startPoint2.X) * (endPoint2.Y - startPoint2.Y) - (endPoint1.Y - startPoint2.Y) * (endPoint2.X - startPoint2.X);
double cross2 = (startPoint1.X - startPoint2.X) * (endPoint2.Y - startPoint2.Y) - (startPoint1.Y - startPoint2.Y) * (endPoint2.X - startPoint2.X);
double dot = cross1 * cross2;
if (dot < 0)
{
return(true);
}
return(false);
}
/// <summary>
/// 判断点是否选中多点
/// </summary>
/// <param name="point"></param>
/// <param name="multiPoint"></param>
/// <returns></returns>
public static bool IsPointOnMultiPoint(WEPoint point, WEMultiPoint multiPoint)
{
int sPointCount = multiPoint.PointCount;
for (int i = 0; i < sPointCount; i++)
{
if (IsPointOnPoint(point, (WEPoint)multiPoint.GetPoint(i)))
{
return(true);
}
}
return(false);
}
/// <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>
/// 求多边形注记的位置（重心位置）
/// </summary>
/// <returns></returns>
public override WEPoint[] getCenterPoint()
{
WEPoint center = new WEPoint(0, 0);
return(new WEPoint[1] {
new WEPoint((_MBR.MinX + _MBR.MaxX) / 2, (_MBR.MinY + _MBR.MaxY) / 2)
});
/*
* for (int i = 0; i < _Points.Count; i++)
* {
* center.X += _Points[i].X;
* center.Y += _Points[i].Y;
* }
* center.X = center.X / _Points.Count;
* center.Y = center.Y / _Points.Count;
* return new WEPoint[1] { center };
*/
}
/// <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>
/// 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);
}
public virtual bool Cover(WEPoint poi)
{
return(false);
}
public override bool Cover(WEPoint poi)
{
return(WEMapTools.IsPointOnPoint(poi, this));
}
public override bool Cover(WEPoint poi)
{
return(WEMapTools.IsPointOnMultiPolyline(poi, this));
}
public void Add(WEPoint poi)
{
_Points.Add(poi);
_MBR += poi.MBR;
}
}; //默认颜色表
/// <summary>
/// 获得两点间距离
/// </summary>
/// <param name="Point1"></param>
/// <param name="Point2"></param>
/// <returns></returns>
public static double GetDistance(WEPoint Point1, WEPoint Point2)
{
return(Math.Sqrt((Point1.X - Point2.X) * (Point1.X - Point2.X) +
(Point1.Y - Point2.Y) * (Point1.Y - Point2.Y)));
}
//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;
}
}