IlvMapTileLoader Class Reference

The base abstract class for tile loaders specialized in loading map formats. More...

#include <ilviews/maps/format/maptloader.h>

Inheritance diagram for IlvMapTileLoader:

Public Member Functions
virtual IlvFeatureRenderer *	getDefaultFeatureRenderer (IlvDisplay *display)=0
	Returns the default feature renderer used for the rendering of map features of the current tile. More...
virtual IlvMapFeatureIterator *	getFeatureIterator (IlvTile *tile)=0
	Returns the feature iterator to read features for the specified tile. More...
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 IlvMapInfo *	getMapInfo ()=0
	Returns the IlvMapInfo used to generate the IlvGraphic objects. 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 IlBoolean	isPersistent () const =0
	Returns IlTrue if this tile loader must be saved by a tile controller. 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
	IlvMapTileLoader ()
	Constructor. More...
void	setInitStatus (IlvMapsError status)
	Sets the error status of the tile loader. More...

Detailed Description

The base abstract class for tile loaders specialized in loading map formats.

Library: ilvmaps

This default implementation of an IlvTileLoader can load data from any data set on which IlvMapFeatureIterator can be constructed for a given tile.
This default implementation can also take advantage of classes implementing IlvLookAheadFeatureIterator.

Constructor & Destructor Documentation

IlvMapTileLoader::IlvMapTileLoader ( )

protected

Constructor.

This class can only be instantiated by subclasses.

Member Function Documentation

virtual IlvFeatureRenderer* IlvMapTileLoader::getDefaultFeatureRenderer ( IlvDisplay *  display )

pure virtual

Returns the default feature renderer used for the rendering of map features of the current tile.

This default feature renderer is used when the user does not set a feature renderer.

Parameters

display

The IlvDisplay

Returns

The default feature renderer.

Implemented in IlvShapeFileTileLoader, IlvImageTileLoader, and IlvGeoTIFFTileLoader.

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

pure virtual

Returns the feature iterator to read features for the specified tile.

Parameters

tile	The tile to load.

Returns

The feature iterator to load features for this tile, or 0 if no features are to be loaded.

Implemented in IlvShapeFileTileLoader, IlvImageTileLoader, and IlvGeoTIFFTileLoader.

virtual IlvFeatureRenderer* IlvMapTileLoader::getFeatureRenderer ( IlvDisplay *  display )

virtual

Returns the renderer to use with this tile loader.

Returns

The renderer to use with this tile loader.

IlvMapsError IlvMapTileLoader::getInitStatus

(

)

const

Checks the initialization status of this tile loader.

Returns

IlvMaps::NoError() if the initialization of this tile loader is successful, or an error code if an error occurred during the initalization.

virtual IlvMapInfo* IlvMapTileLoader::getMapInfo ( )

pure virtual

Returns the IlvMapInfo used to generate the IlvGraphic objects.

Returns

The IlvMapInfo used to generate the IlvGraphic objects.

Implemented in IlvShapeFileTileLoader, IlvImageTileLoader, and IlvGeoTIFFTileLoader.

virtual IlBoolean IlvMapTileLoader::isAttachingAttributes ( ) const

virtual

Test if this tile loader is attaching attributes.

Returns

IlTrue if this tile loader is attaching attributes to the graphic objects it loads, when these are available, and IlFalse otherwise. The default is IlTrue.

IlBoolean IlvMapTileLoader::isOwnerOfRenderer

(

)

const

Returns whether the tile loader is owner of its feature renderer or not.

See Also

IlvMapTileLoader::setFeatureRenderer()

virtual IlBoolean IlvMapTileLoader::isPersistent ( ) const

pure virtual

Returns IlTrue if this tile loader must be saved by a tile controller.

Returns

IlTrue if this tile loader must be saved.

Implements IlvTileLoader.

Implemented in IlvShapeFileTileLoader, IlvImageTileLoader, and IlvGeoTIFFTileLoader.

virtual IlvMapsError IlvMapTileLoader::load ( IlvTile *  tile )

virtual

Method called when a tile has to be loaded.

The default implementation gets the feature iterator for the tile to load by using getFeatureIterator(), and then adds all the objects to the tile using the feature renderer of this tile loader.

If getFeatureIterator() returns 0, the specified tile is assumed to be inexistent and tile->loadComplete() is called.

Parameters

tile	The tile to load.

Returns

An IlvMapsError if an error occurs when loading objects from the specified tile.

Implements IlvTileLoader.

virtual void IlvMapTileLoader::release ( IlvTile *  tile )

virtual

Releases the specified tile.

The default implementation callsn tile->deleteAll()

Parameters

tile	The tile to release.

Implements IlvTileLoader.

virtual void IlvMapTileLoader::setAttachingAttributes ( IlBoolean  set )

virtual

Specifies whether this tile loader is attaching attributes to the graphic objects it loads.

Parameters

set	If IlTrue, attributes are attached.

virtual void IlvMapTileLoader::setFeatureRenderer ( IlvFeatureRenderer *  renderer, IlBoolean  owner = IlFalse  )

virtual

Sets the renderer to use with this tile loader.

Parameters

renderer	The feature renderer.
owner	If this parameter is set to IlTrue, then the tile loader destructor will delete the renderer passed as first argument.

void IlvMapTileLoader::setInitStatus ( IlvMapsError  status )

protected

Sets the error status of the tile loader.

Parameters

status

The initialization error code.