public override void draw(Graphics graphics, GISView view)
{
Point[] points = GISTools.GetScreenPoints(Vertexes, view);
graphics.DrawLines(new Pen(Color.Red, 2), points);
}
public GISExtent extent; //空间范围 最小外接矩形 public abstract void draw(Graphics graphics, GISView view);
public override void draw(Graphics graphics, GISView view)
{
}
public override void draw(Graphics graphics, GISView view)
{
Point[] points = GISTools.GetScreenPoints(Vertexes, view);
graphics.FillPolygon(new SolidBrush(Color.Yellow), points);
graphics.DrawPolygon(new Pen(Color.White, 2), points);
}
public SelectResult SelectPolygon(GISVertex vertex, List <GISFeature> features,
GISView view, GISExtent MinSelectExtent)
{
return(SelectResult.TooFar);
}
public SelectResult Select(GISVertex vertex, List <GISFeature> features, SHAPETYPE shapetype, GISView view)
{
if (features.Count == 0)
{
return(SelectResult.EmptySet);
}
GISExtent MinSelectExtent = BuildExtent(vertex, view);//建立最小选择范围
switch (shapetype)
{
case SHAPETYPE.point:
Console.WriteLine("point");
return(SelectPoint(vertex, features, view, MinSelectExtent));
case SHAPETYPE.line:
Console.WriteLine("line");
return(SelectLine(vertex, features, view, MinSelectExtent));
case SHAPETYPE.polygon:
Console.WriteLine("polygon");
return(SelectPolygon(vertex, features, view, MinSelectExtent));
}
return(SelectResult.UnknownType);
}