api:dk11:delphi:gisviewer.tgis_viewer.locate_tpoint_integer
Table of Contents
TGIS_Viewer.Locate(TPoint; Integer) method
DK11 for Delphi | GisViewer.TGIS_Viewer.Locate | Overloads | Constructors | Fields | Methods | Properties | Events
Locate a shape that is near _pt, but is closer than _prec distance.
Syntax
Implements IGIS_Viewer.Locate.
// Delphi public function Locate( const _pt : TPoint; const _prec : Integer ) : TGIS_ShapeAbstract; overload;
// C++ Builder public: TGIS_ShapeAbstract* Locate( TPoint* const _pt, const int _prec ) /* overload */;
Parameters
| Name | Type | Description |
|---|---|---|
| _pt | TPoint | reference point /searching point/ in pixels |
| _prec | Integer | 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 pixels |
Result
| Type | Description |
|---|---|
| TGIS_ShapeAbstract | Located shape or nil |
Remarks
If no shape is found on a layer, the searcher takes into account labels registered by the allocator (by extent). In order to disable this behavior, _visible must be set to False.
References
2022/11/30 19:19