IlvShapeFileTileLoader Class Reference

This class implements a tile loader to read tiles from an ESRI Shapefile whose spatial index has been created. More...

#include <ilviews/maps/format/shapefile/shptloader.h>

Inheritance diagram for IlvShapeFileTileLoader:

Public Member Functions
	IlvShapeFileTileLoader (const char *shpFilename, const char *dbfFilename, const char *shxFilename, const char *indexFilename, const IlvMapAdapter *adapter)
	Constructs a new .shp file tile loader. More...
const char *	getDBFFilename () const
	Returns the .dbf file from which this tile loader loads attributes.
virtual IlvFeatureRenderer *	getDefaultFeatureRenderer (IlvDisplay *display)
	Returns the default feature renderer for this tile loader.
virtual IlvMapFeatureIterator *	getFeatureIterator (IlvTile *tile)
	Returns the feature iterator to load features from the specified tile. More...
virtual IlBoolean	getLowerRightCorner (IlvCoordinate &c) const
	Returns the lower right corner of data read by this tile loader. More...
virtual IlvMapInfo *	getMapInfo ()
	Returns the IlvMapInfo used to generate the IlvGraphic objects.
const char *	getSHPFilename () const
	Returns the .shp file from which this tile l oader loads geometries.
const char *	getSHXFilename () const
	Returns the .shx file used as the shape index file.
const char *	getSpatialIndexFilename () const
	Returns the spatial index file used by this tile loader to index geometries by tile.
virtual IlvRect &	getTileOrigin ()
	Returns the tile origin. More...
virtual IlBoolean	getUpperLeftCorner (IlvCoordinate &c) const
	Returns the upper left corner of data read by this tile loader. More...
virtual IlBoolean	isPersistent () const
	Indicates if this tile loader must be saved by a tile controller. More...
Public Member Functions inherited from IlvMapTileLoader
virtual IlvFeatureRenderer *	getFeatureRenderer (IlvDisplay *display)
	Returns the renderer to use with this tile loader. More...
IlvMapsError	getInitStatus () const
	Checks the initialization status of this tile loader. More...
virtual IlBoolean	isAttachingAttributes () const
	Test if this tile loader is attaching attributes. More...
IlBoolean	isOwnerOfRenderer () const
	Returns whether the tile loader is owner of its feature renderer or not. More...
virtual IlvMapsError	load (IlvTile *tile)
	Method called when a tile has to be loaded. More...
virtual void	release (IlvTile *tile)
	Releases the specified tile. More...
virtual void	setAttachingAttributes (IlBoolean set)
	Specifies whether this tile loader is attaching attributes to the graphic objects it loads. More...
virtual void	setFeatureRenderer (IlvFeatureRenderer *renderer, IlBoolean owner=IlFalse)
	Sets the renderer to use with this tile loader. More...
Public Member Functions inherited from IlvTileLoader
virtual void	controllerDeleted (IlvTileController *controller)
	Called when the controller is deleted. More...
virtual void	tileDeleted (IlvTile *tile)
	Called when a tile is deleted during the controller destruction. More...

Protected Member Functions
virtual IlvShapeFileReader *	getReader (const char *shpFilename, const char *dbfFilename, const char *shxFilename)
	Creates the IlvShapeFileReader to read from specified files. More...
Protected Member Functions inherited from IlvMapTileLoader
	IlvMapTileLoader ()
	Constructor. More...
void	setInitStatus (IlvMapsError status)
	Sets the error status of the tile loader. More...

Detailed Description

This class implements a tile loader to read tiles from an ESRI Shapefile whose spatial index has been created.

Library: ilvmaps

An ESRI Shapefile can be opened in load-on-demand mode if:

• The main file of the ESRI Shapefile is present (.shp file).
• The index file of the ESRI Shapefile is present (.shx file).
• A Rogue Wave Views Maps spatial index for the Shapefile is present (typically, .idx files).

If an attribute table (.dbf file) is available, the attributes can be attached to objects.

Constructor & Destructor Documentation

IlvShapeFileTileLoader()

IlvShapeFileTileLoader::IlvShapeFileTileLoader	(	const char *	shpFilename,
		const char *	dbfFilename,
		const char *	shxFilename,
		const char *	indexFilename,
		const IlvMapAdapter *	adapter
	)

Constructs a new .shp file tile loader.

Parameters

shpFilename	The name of the .shp filename.
dbfFilename	The name of the .dbf filename.
shxFilename	The name of the .shx filename.
indexFilename	The name of the Rogue Wave Views spatial index filename.
adapter	The adapter to be used for this .shp file.

Member Function Documentation

getFeatureIterator()

virtual IlvMapFeatureIterator* IlvShapeFileTileLoader::getFeatureIterator ( IlvTile *  tile )

virtual

Returns the feature iterator to load features from the specified tile.

This implementation returns an IlvLookAheadFeatureIterator to read features for the specified tile.

Parameters

tile

The tile.

Returns

The feature iterator.

Implements IlvMapTileLoader.

getLowerRightCorner()

virtual IlBoolean IlvShapeFileTileLoader::getLowerRightCorner ( IlvCoordinate &  c ) const

virtual

Returns the lower right corner of data read by this tile loader.

Returns

The lower right corner.

getReader()

virtual IlvShapeFileReader* IlvShapeFileTileLoader::getReader ( const char *  shpFilename, const char *  dbfFilename, const char *  shxFilename  )

protectedvirtual

Creates the IlvShapeFileReader to read from specified files.

Subclasses of IlvShapeFileTileLoader can override this method to produce a reader with the customized parameters for specific applications.

Parameters

shpFilename	The name of the .shp filename.
dbfFilename	The name of the .dbf filename.
shxFilename	The name of the .shx filename.

Returns

The default implementation returns an IlvShapeFileReader with the specified files.

getTileOrigin()

virtual IlvRect& IlvShapeFileTileLoader::getTileOrigin ( )

virtual

Returns the tile origin.

Returns

The tile origin.

getUpperLeftCorner()

virtual IlBoolean IlvShapeFileTileLoader::getUpperLeftCorner ( IlvCoordinate &  c ) const

virtual

Returns the upper left corner of data read by this tile loader.

Returns

The upper left corner.

isPersistent()

virtual IlBoolean IlvShapeFileTileLoader::isPersistent ( ) const

virtual

Indicates if this tile loader must be saved by a tile controller.

Returns

IlTrue since this tile loader is to be saved by a tile controller.

Implements IlvMapTileLoader.