/// <summary>
/// 从CGM地图文件中复原地图
/// </summary>
internal void GenerateMapFromCGM(string FileName)
{
treeViewLayers.Nodes.Clear();
MapReader.CGM newCGM = new MapReader.CGM(FileName);
myMap = newCGM.MyMap;
ratio = newCGM.Ratio;
scaleIndex = newCGM.ScaleIndex;
centerLngLat = newCGM.CenterPos;
centerXY = ETCProjection.LngLat2XY(centerLngLat); //同步更新屏幕中心点投影坐标系坐标
int i = 0;
TreeNode mapNode = new TreeNode(myMap.MapName, 1, 1); //添加根节点，Map节点
mapNode.Checked = true;
treeViewLayers.Nodes.Add(mapNode);
for (i = 0; i < myMap.LayerNum; i++) //添加空间数据对象节点
{
TreeNode layerNode = new TreeNode(myMap.GetLayerName(i), 2, 2);
layerNode.Checked = true;
treeViewLayers.Nodes[0].Nodes.Add(layerNode);
}
if (myMap.hasBaseMap)
{
TreeNode basemapNode = new TreeNode(myMap.GetLayerName(i), 1, 1); //添加basemap对象节点
basemapNode.Checked = true;
treeViewLayers.Nodes[0].Nodes.Add(basemapNode);
}
treeViewLayers.ExpandAll(); //打开所有节点
picBoxMap.MouseWheel += new MouseEventHandler(picBoxMap_MouseWheel); //添加鼠标滑轮缩放地图
mapImg = new Bitmap(picBoxMap.Bounds.Width, picBoxMap.Bounds.Height); //构造地图内存图
UpdateMapImg();
}
/// <summary>
/// 画注记
/// </summary>
/// <param name="g"></param>
/// <param name="bounds"></param>
/// <param name="centerPos"></param>
/// <param name="scale"></param>
/// <param name="fid2Text"></param>
internal override void DrawLabel(Graphics g, Rectangle bounds, PointF centerPos, double scale, Dictionary <int, string> fid2Text, TextSymbol textSymbol)
{
MyPoint xyCenter = ETCProjection.LngLat2XY(new MyPoint(centerPos.X, centerPos.Y));
double xmin = xyCenter.X - scale * bounds.Width / 2;
double xmax = xyCenter.X + scale * bounds.Width / 2;
double ymin = xyCenter.Y - scale * bounds.Height / 2;
double ymax = xyCenter.Y + scale * bounds.Height / 2;
for (int i = 0; i < polygons.Count; i++)
{
List <PointF> pointfs = new List <PointF>();
for (int j = 0; j < polygons[i].PointCount; j++)
{
MyPoint xyProjection = ETCProjection.LngLat2XY(polygons[i].Points[j]);
double xScreen = bounds.Width * (xyProjection.X - xmin) / (xmax - xmin);
double yScreen = bounds.Height * (xyProjection.Y - ymin) / (ymax - ymin);
PointF p = new PointF((float)xScreen, bounds.Height - (float)yScreen);
pointfs.Add(p);
}
RectangleF mbr = GeometryTools.GetMBR(pointfs.ToArray());
string text = fid2Text[polygons[i].FID];
if (Math.Max(mbr.Width, mbr.Height) > textSymbol.TextStyle.TextSize * text.Length)
{
TextSymbol.PolygonLabel(pointfs.ToArray(), g, textSymbol, text);
}
}
}
/// <summary>
/// 点选
/// </summary>
/// <returns>被选中要素FID的List</returns>
internal override List <int> SelectByPoint(Point mouseLocation, Rectangle bounds, PointF centerPos, double scale)
{
List <int> selectedID = new List <int>();
MyPoint xyCenter = ETCProjection.LngLat2XY(new MyPoint(centerPos.X, centerPos.Y));
double xmin = xyCenter.X - scale * bounds.Width / 2;
double xmax = xyCenter.X + scale * bounds.Width / 2;
double ymin = xyCenter.Y - scale * bounds.Height / 2;
double ymax = xyCenter.Y + scale * bounds.Height / 2;
for (int i = 0; i < polygons.Count; i++)
{
MyPoint[] screenPoints = new MyPoint[polygons[i].PointCount];
for (int j = 0; j < polygons[i].PointCount; j++)
{
MyPoint xyProjection = ETCProjection.LngLat2XY(polygons[i].Points[j]);
double xScreen = bounds.Width * (xyProjection.X - xmin) / (xmax - xmin);
double yScreen = bounds.Height * (xyProjection.Y - ymin) / (ymax - ymin);
MyPoint screen = new MyPoint(xScreen, bounds.Height - yScreen);
screenPoints[j] = screen;
}
polygons[i].Selected = GeometryTools.IsPointInPolygon(new MyPoint(mouseLocation.X, mouseLocation.Y), screenPoints);
if (polygons[i].Selected == true)
{
selectedID.Add(i);
}
}
return(selectedID);
}
/// <summary>
/// 唯一值渲染和分级渲染时的绘制要素
/// </summary>
/// <param name="g"></param>
/// <param name="bounds"></param>
/// <param name="centerPos"></param>
/// <param name="scale"></param>
/// <param name="fid2Symbol"></param>
internal override void DrawSpaceData(Graphics g, Rectangle bounds, PointF centerPos, double scale, Dictionary <int, Symbol> fid2Symbol)
{
//选中要素的样式
Brush selectedBrush = new SolidBrush(Color.Cyan);
MyPoint xyCenter = ETCProjection.LngLat2XY(new MyPoint(centerPos.X, centerPos.Y));
double xmin = xyCenter.X - scale * bounds.Width / 2;
double xmax = xyCenter.X + scale * bounds.Width / 2;
double ymin = xyCenter.Y - scale * bounds.Height / 2;
double ymax = xyCenter.Y + scale * bounds.Height / 2;
for (int i = 0; i < myPoints.Count; i++)
{
//从symbol中获取样式
PointSymbol ps = (PointSymbol)fid2Symbol[myPoints[i].FID];
MyPoint xyProjection = ETCProjection.LngLat2XY(myPoints[i]);
double xScreen = bounds.Width * (xyProjection.X - xmin) / (xmax - xmin);
double yScreen = bounds.Height * (xyProjection.Y - ymin) / (ymax - ymin);
if (GeometryTools.IsPointInBox(new MyPoint(xScreen, yScreen), new MyRectangle(bounds.X, bounds.Width, bounds.Y, bounds.Height)) == true)
{
if (myPoints[i].Selected == true)
{
Rectangle rect = new Rectangle((int)xScreen - 5, bounds.Height - (int)yScreen - 5, 10, 10);
g.FillEllipse(selectedBrush, rect);
}
else
{
ps.GetSymbol(g, new PointF((float)xScreen, bounds.Height - (float)yScreen));
}
}
}
}
/// <summary>
/// 屏幕坐标系转地理坐标系
/// </summary>
/// <param name="screenPos"></param>
/// <returns></returns>
private MyPoint ScreenToWGS84(Point screenPoint)
{
screenPoint.Y = picBoxMap.Height - screenPoint.Y;
double centerScreenX = (double)picBoxMap.Width / 2; //屏幕坐标系中心点X坐标
double centerScreenY = (double)picBoxMap.Height / 2; //屏幕坐标系中心点Y坐标
double x = centerXY.X - (centerScreenX - screenPoint.X) * ratio * scaleChoice[scaleIndex]; //投影坐标系目标点X坐标
double y = centerXY.Y - (centerScreenY - screenPoint.Y) * ratio * scaleChoice[scaleIndex]; //投影坐标系目标点Y坐标
MyPoint xy = new MyPoint(x, y); //投影坐标系下的目标点
MyPoint lnglat = ETCProjection.XY2LngLat(xy); //WGS84坐标系下的目标点
return(lnglat);
}
/// <summary>
/// 判断一个多边形是否完全位于矩形盒内
/// </summary>
/// <param name="polygon"></param>
/// <param name="box"></param>
/// <returns></returns>
public static bool IsPolygonCompleteInBox(MyMultiPolygon polygon, MyRectangle box)
{
int sPointCount = polygon.PointCount;
for (int i = 0; i < sPointCount; i++)
{
MyPoint pointXY = ETCProjection.LngLat2XY(polygon.Points[i]); //投影坐标系下的坐标
if (IsPointInBox(pointXY, box) == false)
{
return(false);
}
}
return(true);
}
/// <summary>
/// 根据矩形盒选择要素，矩形盒坐标位于投影坐标系
/// </summary>
/// <param name="box">矩形盒</param>
internal override List <int> SelectByBox(MyRectangle box)
{
List <int> selectedID = new List <int>();
for (int i = 0; i < myPoints.Count; i++)
{
MyPoint pointXY = ETCProjection.LngLat2XY(myPoints[i]); //投影坐标系下的坐标
myPoints[i].Selected = GeometryTools.IsPointInBox(pointXY, box);
if (myPoints[i].Selected == true)
{
selectedID.Add(i);
}
}
return(selectedID);
}
internal void FullExtent()
{
if (myMap.LayerNum != 0)
{
MyRectangle mbr = myMap.GetMBR();
centerLngLat = new PointF(((float)mbr.MaxX + (float)mbr.MinX) * 0.5F, ((float)mbr.MaxY + (float)mbr.MinY) * 0.5F);
double x = ETCProjection.Longitude2X(mbr.MaxX) - ETCProjection.Longitude2X(mbr.MinX);
double y = ETCProjection.Latitude2Y(mbr.MaxY) - ETCProjection.Latitude2Y(mbr.MinY);
double scale1 = x / Width;
double scale2 = y / Height;
Ratio = Math.Max(scale1, scale2);
scaleIndex = maxZoomLevel;
UpdateMapImg();
}
}
/// <summary>
/// 唯一值渲染和分级渲染时的绘制要素
/// </summary>
/// <param name="g"></param>
/// <param name="bounds"></param>
/// <param name="centerPos"></param>
/// <param name="scale"></param>
/// <param name="fid2Symbol"></param>
internal override void DrawSpaceData(Graphics g, Rectangle bounds, PointF centerPos, double scale, Dictionary <int, Symbol> fid2Symbol)
{
//选中要素的样式
Pen selectedPen = new Pen(Color.Cyan);
selectedPen.Width = 2.5F;
MyPoint xyCenter = ETCProjection.LngLat2XY(new MyPoint(centerPos.X, centerPos.Y));
double xmin = xyCenter.X - scale * bounds.Width / 2;
double xmax = xyCenter.X + scale * bounds.Width / 2;
double ymin = xyCenter.Y - scale * bounds.Height / 2;
double ymax = xyCenter.Y + scale * bounds.Height / 2;
for (int i = 0; i < polylines.Count; i++)
{
//从symbol中获取样式
LineSymbol ls = (LineSymbol)fid2Symbol[polylines[i].FID];
Pen mypen = ls.GetPen;
List <int> parts = new List <int>(polylines[i].firstIndex);
parts.Add(polylines[i].PointCount);
for (int k = 0; k < polylines[i].firstIndex.Length; k++) //对于每一条多线的子线段
{
List <PointF> pointfs = new List <PointF>();
for (int j = parts[k]; j < parts[k + 1]; j++)
{
MyPoint xyProjection = ETCProjection.LngLat2XY(polylines[i].Points[j]);
double xScreen = bounds.Width * (xyProjection.X - xmin) / (xmax - xmin);
double yScreen = bounds.Height * (xyProjection.Y - ymin) / (ymax - ymin);
PointF p = new PointF((float)xScreen, bounds.Height - (float)yScreen);
pointfs.Add(p);
}
if (GeometryTools.IsPointsPartInRectangle(pointfs.ToArray(), new MyRectangle(bounds.X, bounds.Width, bounds.Y, bounds.Height)) == true)
{
if (polylines[i].Selected == false)
{
g.DrawLines(mypen, pointfs.ToArray());
}
else
{
g.DrawLines(selectedPen, pointfs.ToArray());
}
}
}
}
}
/// <summary>
/// 移动选中的要素
/// </summary>
/// <param name="deltaX">X方向移动量，屏幕坐标系</param>
/// <param name="deltaY">y方向移动量，屏幕坐标系</param>
/// <param name="bounds"></param>
/// <param name="centerPos"></param>
/// <param name="scale"></param>
internal override void MoveSelectedFeature(int deltaX, int deltaY, Rectangle bounds, PointF centerPos, double scale)
{
for (int i = 0; i < myPoints.Count; i++)
{
if (myPoints[i].Selected == true)
{
int id = myPoints[i].FID;
MyPoint pointXY = ETCProjection.LngLat2XY(myPoints[i]);
pointXY.X += scale * deltaX;
pointXY.Y -= scale * deltaY;
myPoints[i] = ETCProjection.XY2LngLat(pointXY);
myPoints[i].FID = id;
myPoints[i].Selected = true;
}
}
SetMaxMin();
}
/// <summary>
/// 移动选中的要素
/// </summary>
/// <param name="deltaX">X方向移动量，屏幕坐标系</param>
/// <param name="deltaY">y方向移动量，屏幕坐标系</param>
/// <param name="bounds"></param>
/// <param name="centerPos"></param>
/// <param name="scale"></param>
internal override void MoveSelectedFeature(int deltaX, int deltaY, Rectangle bounds, PointF centerPos, double scale)
{
for (int i = 0; i < polygons.Count; i++)
{
if (polygons[i].Selected == true)
{
for (int j = 0; j < polygons[i].PointCount; j++)
{
MyPoint pointXY = ETCProjection.LngLat2XY(polygons[i].Points[j]);
pointXY.X += scale * deltaX;
pointXY.Y -= scale * deltaY;
polygons[i].Points[j] = ETCProjection.XY2LngLat(pointXY);
}
}
}
SetMaxMin();
}
/// <summary>
/// 画注记
/// </summary>
/// <param name="g"></param>
/// <param name="bounds"></param>
/// <param name="centerPos"></param>
/// <param name="scale"></param>
/// <param name="fid2Text"></param>
internal override void DrawLabel(Graphics g, Rectangle bounds, PointF centerPos, double scale, Dictionary <int, string> fid2Text, TextSymbol textSymbol)
{
MyPoint xyCenter = ETCProjection.LngLat2XY(new MyPoint(centerPos.X, centerPos.Y));
double xmin = xyCenter.X - scale * bounds.Width / 2;
double xmax = xyCenter.X + scale * bounds.Width / 2;
double ymin = xyCenter.Y - scale * bounds.Height / 2;
double ymax = xyCenter.Y + scale * bounds.Height / 2;
for (int i = 0; i < myPoints.Count; i++)
{
string text = fid2Text[myPoints[i].FID];
MyPoint xyProjection = ETCProjection.LngLat2XY(myPoints[i]);
double xScreen = bounds.Width * (xyProjection.X - xmin) / (xmax - xmin);
double yScreen = bounds.Height * (xyProjection.Y - ymin) / (ymax - ymin);
TextSymbol.PointLabel(new PointF((float)xScreen, bounds.Height - (float)yScreen), g, textSymbol, text); //此处注记样式不能修改。待完善
}
}
/// <summary>
/// 绘制栅格数据
/// </summary>
/// <param name="g"></param>
/// <param name="bounds"></param>
/// <param name="centerPos"></param>
/// <param name="scale"></param>
internal void DrawSpaceData(Graphics g, Rectangle bounds, PointF centerPos, double scale)
{
double x1 = ETCProjection.Longitude2X(minX);
double x2 = ETCProjection.Longitude2X(maxX);
double y1 = ETCProjection.Latitude2Y(minY);
double y2 = ETCProjection.Latitude2Y(maxY);
double width = (x2 - x1) / scale;
double height = (y2 - y1) / scale;
PointF centerXY = ETCProjection.LngLat2XY(centerPos);
float dx = (centerXY.X - (float)x1) / (float)scale;
float dy = (centerXY.Y - (float)y2) / (float)scale;
RectangleF boundary = new RectangleF((float)bounds.Width * 0.5F - dx, (float)bounds.Height * 0.5F + dy, (float)width, (float)height);
g.DrawImage(mapBmp, boundary);
}
/// <summary>
/// 增加Shapefile图层
/// </summary>
/// <param name="shp"></param>
internal void AddLayer(Shapefile shp)
{
myMap.AddLayer(new MyLayer(shp));
TreeNode layerNode = new TreeNode(shp.Name, 2, 2);
layerNode.Checked = true;
centerLngLat = shp.CenterPos;
centerXY = ETCProjection.LngLat2XY(centerLngLat); //同步更新屏幕中心点投影坐标系坐标
treeViewLayers.Nodes[0].Nodes.Insert(0, layerNode);
treeViewLayers.ExpandAll();
double x = ETCProjection.Longitude2X(shp.Xmax) - ETCProjection.Longitude2X(shp.Xmin);
double y = ETCProjection.Latitude2Y(shp.Ymax) - ETCProjection.Latitude2Y(shp.Ymin);
double scale1 = x / Width;
double scale2 = y / Height;
Ratio = Math.Max(scale1, scale2);
scaleIndex = maxZoomLevel;
UpdateMapImg();
}
/// <summary>
/// 增加栅格图层
/// </summary>
/// <param name="grid"></param>
internal void AddLayer(MyGrid grid)
{
myMap.AddLayer(new MyLayer(grid));
TreeNode layerNode = new TreeNode(grid.Name, 2, 2);
layerNode.Checked = true;
treeViewLayers.Nodes[0].Nodes.Insert(0, layerNode);
treeViewLayers.ExpandAll();
centerLngLat = new PointF(((float)grid.MaxX + (float)grid.MinX) * 0.5F, ((float)grid.MaxY + (float)grid.MinY) * 0.5F);
centerXY = ETCProjection.LngLat2XY(centerLngLat); //同步更新屏幕中心点投影坐标系坐标
double x = ETCProjection.Longitude2X(grid.MaxX) - ETCProjection.Longitude2X(grid.MinX);
double y = ETCProjection.Latitude2Y(grid.MaxY) - ETCProjection.Latitude2Y(grid.MinY);
double scale1 = x / Width;
double scale2 = y / Height;
Ratio = Math.Max(scale1, scale2);
scaleIndex = maxZoomLevel;
UpdateMapImg();
}
/// <summary>
/// 点选选中要素的顶点
/// </summary>
/// <param name="mouseLocation"></param>
/// <param name="bounds"></param>
/// <param name="centerPos"></param>
/// <param name="scale"></param>
internal override void SelectVertex(Point mouseLocation, Rectangle bounds, PointF centerPos, double scale)
{
MyPoint xyCenter = ETCProjection.LngLat2XY(new MyPoint(centerPos.X, centerPos.Y));
double xmin = xyCenter.X - scale * bounds.Width / 2;
double xmax = xyCenter.X + scale * bounds.Width / 2;
double ymin = xyCenter.Y - scale * bounds.Height / 2;
double ymax = xyCenter.Y + scale * bounds.Height / 2;
for (int i = 0; i < polygons.Count; i++)
{
if (polygons[i].Selected == true) //polylines[i]被选中
{
for (int j = 0; j < polygons[i].PointCount; j++)
{
MyPoint xyProjection = ETCProjection.LngLat2XY(polygons[i].Points[j]);
double xScreen = bounds.Width * (xyProjection.X - xmin) / (xmax - xmin);
double yScreen = bounds.Height * (xyProjection.Y - ymin) / (ymax - ymin);
MyPoint screen = new MyPoint(xScreen, bounds.Height - yScreen); //polygons[i].Points[j]在屏幕坐标系的位置
polygons[i].Points[j].Selected = GeometryTools.IsPointInCircle(new MyPoint(mouseLocation.X, mouseLocation.Y), screen, margin); //判断polylines[i].Points[j]是否被选中并修改Selected属性的值
}
}
}
}
/// <summary>
/// 点选
/// </summary>
/// <returns>被选中要素FID的List</returns>
internal override List <int> SelectByPoint(Point mouseLocation, Rectangle bounds, PointF centerPos, double scale)
{
List <int> selectedID = new List <int>();
MyPoint xyCenter = ETCProjection.LngLat2XY(new MyPoint(centerPos.X, centerPos.Y));
double xmin = xyCenter.X - scale * bounds.Width / 2;
double xmax = xyCenter.X + scale * bounds.Width / 2;
double ymin = xyCenter.Y - scale * bounds.Height / 2;
double ymax = xyCenter.Y + scale * bounds.Height / 2;
for (int i = 0; i < myPoints.Count; i++)
{
MyPoint xyProjection = ETCProjection.LngLat2XY(myPoints[i]);
double xScreen = bounds.Width * (xyProjection.X - xmin) / (xmax - xmin);
double yScreen = bounds.Height - bounds.Height * (xyProjection.Y - ymin) / (ymax - ymin);
MyPoint screen = new MyPoint(xScreen, yScreen);
myPoints[i].Selected = GeometryTools.IsPointInCircle(new MyPoint(mouseLocation.X, mouseLocation.Y), screen, margin);
if (myPoints[i].Selected == true)
{
selectedID.Add(i);
}
}
return(selectedID);
}
/// <summary>
/// 画注记
/// </summary>
/// <param name="g"></param>
/// <param name="bounds"></param>
/// <param name="centerPos"></param>
/// <param name="scale"></param>
/// <param name="fid2Text"></param>
internal override void DrawLabel(Graphics g, Rectangle bounds, PointF centerPos, double scale, Dictionary <int, string> fid2Text, TextSymbol textSymbol)
{
MyPoint xyCenter = ETCProjection.LngLat2XY(new MyPoint(centerPos.X, centerPos.Y));
double xmin = xyCenter.X - scale * bounds.Width / 2;
double xmax = xyCenter.X + scale * bounds.Width / 2;
double ymin = xyCenter.Y - scale * bounds.Height / 2;
double ymax = xyCenter.Y + scale * bounds.Height / 2;
for (int i = 0; i < polylines.Count; i++)
{
string text = fid2Text[polylines[i].FID];
List <PointF> pointfs = new List <PointF>();
for (int j = 0; j < polylines[i].PointCount; j++)
{
MyPoint xyProjection = ETCProjection.LngLat2XY(polylines[i].Points[j]);
double xScreen = bounds.Width * (xyProjection.X - xmin) / (xmax - xmin);
double yScreen = bounds.Height * (xyProjection.Y - ymin) / (ymax - ymin);
PointF p = new PointF((float)xScreen, bounds.Height - (float)yScreen);
pointfs.Add(p);
}
TextSymbol.LineLabel(pointfs.ToArray(), g, textSymbol, text); //此处注记样式不能修改。待完善
}
}
/// <summary>
/// 地图鼠标移动事件
/// </summary>
private void picBoxMap_MouseMove(object sender, MouseEventArgs e)
{
isClick = false;
switch (operationType)
{
case MapOperation.SelectElement:
break;
case MapOperation.ZoomIn:
break;
case MapOperation.ZoomOut:
break;
case MapOperation.Pan: //漫游
if (e.Button == MouseButtons.Left)
{
int deltaX = e.X - mouseOldLoc.X;
int deltaY = e.Y - mouseOldLoc.Y;
centerXY = ETCProjection.LngLat2XY(centerLngLat);
centerXY.X -= deltaX * (float)ratio * (float)scaleChoice[scaleIndex];
centerXY.Y += deltaY * (float)ratio * (float)scaleChoice[scaleIndex]; //由于屏幕坐标系是左上坐标系，和地理坐标系相反，所以这里应该是+
centerLngLat = ETCProjection.XY2LngLat(centerXY);
mouseOldLoc = e.Location;
UpdateMapImg();
}
break;
case MapOperation.SelectFeatures: //选择要素
if (e.Button == MouseButtons.Left)
{
picBoxMap.Refresh();
int minX = Math.Min(startPoint.X, e.Location.X);
int maxX = Math.Max(startPoint.X, e.Location.X);
int minY = Math.Min(startPoint.Y, e.Location.Y);
int maxY = Math.Max(startPoint.Y, e.Location.Y);
DrawSelectBox(minX, minY, maxX - minX, maxY - minY); //画选择盒
}
break;
case MapOperation.Edit: //编辑要素
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
int deltaX = e.X - mouseOldLoc.X;
int deltaY = e.Y - mouseOldLoc.Y;
myMap.Layers[EditingIndex].MoveSelectedFeature(deltaX, deltaY, picBoxMap.Bounds, centerLngLat, ratio * scaleChoice[scaleIndex]);
mouseOldLoc = e.Location;
UpdateMapImg();
}
break;
case MapOperation.EditVertices: //编辑要素顶点
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
picBoxMap.Cursor = Cursors.SizeAll;
myMap.Layers[EditingIndex].MoveVertex(ScreenToWGS84(e.Location));
UpdateMapImg();
}
break;
case MapOperation.CreateFeatures: //创建要素
if (trackingPoints.Count > 0)
{
picBoxMap.Refresh();
DrawTrackingFeature();
DrawRubberBand(e.Location); //画橡皮筋
}
break;
}
//更新鼠标当前位置对应地理坐标
MyPoint mouseLngLat = ScreenToWGS84(e.Location);
StatusStripLblCoordinate.Text = mouseLngLat.X.ToString() + "," + mouseLngLat.Y.ToString();
StatusStripLblScale.Text = MapScale.ToString();
}
/// <summary>
/// 简单渲染时的绘制要素
/// </summary>
/// <param name="g"></param>
/// <param name="bounds"></param>
/// <param name="centerPos"></param>
/// <param name="scale"></param>
/// <param name="symbol"></param>
internal override void DrawSpaceData(Graphics g, Rectangle bounds, PointF centerPos, double scale, Symbol symbol)
{
//选中要素的样式
Pen selectedPen = new Pen(Color.Cyan);
selectedPen.Width = 2.5F;
//从symbol中获取样式
PolygonSymbol ps = (PolygonSymbol)symbol;
Pen mypen = ps.LineStyle.GetPen;
Brush mybrush = new SolidBrush(ps.GetColor());
MyPoint xyCenter = ETCProjection.LngLat2XY(new MyPoint(centerPos.X, centerPos.Y));
double xmin = xyCenter.X - scale * bounds.Width / 2;
double xmax = xyCenter.X + scale * bounds.Width / 2;
double ymin = xyCenter.Y - scale * bounds.Height / 2;
double ymax = xyCenter.Y + scale * bounds.Height / 2;
for (int i = 0; i < polygons.Count; i++)
{
List <int> parts = new List <int>(polygons[i].firstIndex);
parts.Add(polygons[i].PointCount);
for (int k = 0; k < polygons[i].firstIndex.Length; k++) //对于每一个MultiPolygon的子多边形
{
List <PointF> pointfs = new List <PointF>();
for (int j = parts[k]; j < parts[k + 1]; j++)
{
MyPoint xyProjection = ETCProjection.LngLat2XY(polygons[i].Points[j]);
double xScreen = bounds.Width * (xyProjection.X - xmin) / (xmax - xmin);
double yScreen = bounds.Height * (xyProjection.Y - ymin) / (ymax - ymin);
PointF p = new PointF((float)xScreen, bounds.Height - (float)yScreen);
pointfs.Add(p);
}
if (GeometryTools.IsPointsPartInRectangle(pointfs.ToArray(), new MyRectangle(bounds.X, bounds.Width, bounds.Y, bounds.Height)) == true)
{
g.DrawPolygon(mypen, pointfs.ToArray());
g.FillPolygon(mybrush, pointfs.ToArray());
}
}
}
for (int i = 0; i < polygons.Count; i++)
{
if (polygons[i].Selected == true)
{
List <int> parts = new List <int>(polygons[i].firstIndex);
parts.Add(polygons[i].PointCount);
for (int k = 0; k < polygons[i].firstIndex.Length; k++) //对于每一个MultiPolygon的子多边形
{
List <PointF> pointfs = new List <PointF>();
for (int j = parts[k]; j < parts[k + 1]; j++)
{
MyPoint xyProjection = ETCProjection.LngLat2XY(polygons[i].Points[j]);
double xScreen = bounds.Width * (xyProjection.X - xmin) / (xmax - xmin);
double yScreen = bounds.Height * (xyProjection.Y - ymin) / (ymax - ymin);
PointF p = new PointF((float)xScreen, bounds.Height - (float)yScreen);
pointfs.Add(p);
}
if (GeometryTools.IsPointsPartInRectangle(pointfs.ToArray(), new MyRectangle(bounds.X, bounds.Width, bounds.Y, bounds.Height)) == true)
{
g.DrawPolygon(selectedPen, pointfs.ToArray()); //画选中多边形的轮廓
}
}
}
}
}
