/// <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>
/// 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);
}