public MemoryDataSource(string name,
enumShapeType shapeType,
enumCoordinateType coordType,
Envelope fullEnvelope,
string[] filedNames
)
: base(name)
{
_shapeType = shapeType;
_coordType = enumCoordinateType.Geographic;
_gridDefinition = new GridDefinition((float)(fullEnvelope.Width + float.Epsilon),
(float)(fullEnvelope.Height + float.Epsilon));
_fullEnvelope = fullEnvelope;
_gridStateIndicator = new GridStateIndicator(_fullEnvelope.Clone() as Envelope, _gridDefinition);
_fullGridCount = _gridStateIndicator.Width * _gridStateIndicator.Height;
_grid = new Grid(0, _fullEnvelope.Clone() as Envelope, new Feature[] { });
_fields = filedNames;
}
private bool HitTestByPoint(ShapePoint shapePoint, double tolerance)
{
if (this is ShapePoint)
{
Envelope evp = Envelope.Clone() as Envelope;
evp = evp.Expand((float)tolerance);
return(evp.Contains(shapePoint.Envelope));
}
else if (this is ShapePolyline)
{
return(GeometryMathLib.GetDistance(this as ShapePolyline, shapePoint) < tolerance);
}
else if (this is ShapePolygon)
{
return((this as ShapePolygon).Contains(shapePoint));
}
else
{
throw new NotSupportedException("暂不支持对\"" + this.GetType().ToString() + "\"进行点击测试。");
}
}