User Tools

Site Tools


Table of Contents

IGIS_Viewer.Locate(TGIS_Point, double, bool) method

DK11 for Java | tatukgis.jdk.IGIS_Viewer.Locate | Overloads | Methods | Properties

Locate a shape that is near _ptg, but is closer than _prec distance.

Available also on: Delphi | .NET | ActiveX.


// Java
public abstract TGIS_ShapeAbstract Locate(
  TGIS_Point _ptg,
  double _prec,
  bool _visible
// Oxygene
  function Locate(
    _ptg : TGIS_Point;
    _prec : Double;
    _visible : Boolean
  ) : TGIS_ShapeAbstract;


Name Type Description
_ptg TGIS_Point reference point /searching point/
_prec double
precision /not a longer distance than/; for points inside the polygon (if _prec >= 0) the distance will be multiply by 0.95 (to prefer points inside the polygon) but will not be bigger then _prec; for point distance will be multiplied by 0.9 to prefer points over lines and polygons; precision is express in map units
_visible bool
if true the only visible shapes will be evaluated; shapes turned of by query of hidden will be ignored


Type Description
TGIS_ShapeAbstract Located shape or nil


To improve performance sections visibility can be used to choose layer to call its Locate method. Only visible shapes will be evaluated.

If locate is called upon active paint operations then result could be null. But Locate and paint process are using the same vector enumerator context.

It is recommended to check InPaint property before calling this Locate.

2020/05/07 01:14

Page Tools