/// <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);
}