public Boolean Evaluate(Feature feature)
{
if (feature.geometry == null)
{
return(false);
}
switch (feature.geometry.geometryType)
{
case OSGeo.OGR.wkbGeometryType.wkbPoint:
PointD point_data = (PointD)feature.geometry;
PointD point_map = this.rsTransfrom.sourceToTarget(point_data);
return(SpatialTopology.IsPointInRectangle(point_map, this.rect));
case OSGeo.OGR.wkbGeometryType.wkbPolygon:
SimplePolygon polygon_data = (SimplePolygon)feature.geometry;
return(checksimplepolygon(polygon_data));
case OSGeo.OGR.wkbGeometryType.wkbLineString:
SimplePolyline line_data = (SimplePolyline)feature.geometry;
return(checkpolyline(line_data));
case OSGeo.OGR.wkbGeometryType.wkbMultiPolygon:
Polygon mutipolygon_data = (Polygon)feature.geometry;
return(checkmutipolygon(mutipolygon_data));
case OSGeo.OGR.wkbGeometryType.wkbMultiLineString:
break;
}
//to do
return(false);
}
public bool checkpolyline(SimplePolyline polyline_data)
{
List <PointD> polyline_points_map = new List <PointD>();
int pointcount = polyline_data.points.Count;
for (int i = 0; i < pointcount; i++)
{
polyline_points_map.Add(rsTransfrom.sourceToTarget(polyline_data.points[i]));
}
SimplePolyline polyline_map = new SimplePolyline(polyline_points_map);
return(SpatialTopology.IsSimplePolyLineInRectangle(polyline_map, rect));
}
public bool checksimplepolygon(SimplePolygon polygon_data)
{
List <PointD> ring0_points_data = polygon_data.rings[0].points;
List <PointD> ring0_points_map = new List <PointD>();
for (int i = 0; i < ring0_points_data.Count; i++)
{
ring0_points_map.Add(this.rsTransfrom.sourceToTarget(ring0_points_data[i]));
}
SimplePolyline ring0 = new SimplePolyline(ring0_points_map);
List <SimplePolyline> temp = new List <SimplePolyline>(); temp.Add(ring0);
SimplePolygon polygon_map = new SimplePolygon(temp);
return(SpatialTopology.IsSimplePolygonIntersectRect(polygon_map, this.rect));
}
public bool CheckIsPointSelectedofSelectedFeatureCollection(PointD mouselocation, double interval)
{
if (selectedFeatureCollection == null || selectedFeatureCollection.featureList.Count == 0)
{
return(false);
}
foreach (Feature feature in selectedFeatureCollection.featureList)
{
switch (feature.geometry.geometryType)
{
case OSGeo.OGR.wkbGeometryType.wkbPoint:
if (SpatialTopology.GetDistanceBetweenPoints((PointD)feature.geometry, mouselocation) < interval)
{
this.selectedPoint = (PointD)feature.geometry;
return(true);
}
break;
case OSGeo.OGR.wkbGeometryType.wkbLineString:
SimplePolyline simpleline = (SimplePolyline)feature.geometry;
foreach (PointD linepoint in simpleline.points)
{
if (SpatialTopology.GetDistanceBetweenPoints(linepoint, mouselocation) < interval)
{
this.selectedPoint = linepoint;
return(true);
}
}
break;
case OSGeo.OGR.wkbGeometryType.wkbPolygon:
SimplePolygon simplepolygon = (SimplePolygon)feature.geometry;
foreach (SimplePolyline ring in simplepolygon.rings)
{
foreach (PointD linepoint in ring.points)
{
if (SpatialTopology.GetDistanceBetweenPoints(linepoint, mouselocation) < interval)
{
this.selectedPoint = linepoint;
return(true);
}
}
}
break;
}
}
this.selectedPoint = null; return(false);
}