The base abstract class for tile loaders specialized in loading map formats.
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#include <ilviews/maps/format/maptloader.h>
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
.
§ IlvMapTileLoader()
IlvMapTileLoader::IlvMapTileLoader |
( |
| ) |
|
|
protected |
Constructor.
This class can only be instantiated by subclasses.
§ getDefaultFeatureRenderer()
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
-
- Returns
- The default feature renderer.
Implemented in IlvShapeFileTileLoader, IlvImageTileLoader, and IlvGeoTIFFTileLoader.
§ getFeatureIterator()
§ getFeatureRenderer()
Returns the renderer to use with this tile loader.
- Returns
- The renderer to use with this tile loader.
§ getInitStatus()
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.
§ getMapInfo()
virtual IlvMapInfo* IlvMapTileLoader::getMapInfo |
( |
| ) |
|
|
pure virtual |
§ isAttachingAttributes()
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
.
§ isOwnerOfRenderer()
IlBoolean IlvMapTileLoader::isOwnerOfRenderer |
( |
| ) |
const |
§ isPersistent()
virtual IlBoolean IlvMapTileLoader::isPersistent |
( |
| ) |
const |
|
pure virtual |
§ load()
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
-
- Returns
- An
IlvMapsError
if an error occurs when loading objects from the specified tile.
Implements IlvTileLoader.
§ release()
virtual void IlvMapTileLoader::release |
( |
IlvTile * |
tile | ) |
|
|
virtual |
Releases the specified tile.
The default implementation callsn tile->deleteAll()
- Parameters
-
Implements IlvTileLoader.
§ setAttachingAttributes()
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. |
§ setFeatureRenderer()
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. |
§ setInitStatus()
void IlvMapTileLoader::setInitStatus |
( |
IlvMapsError |
status | ) |
|
|
protected |
Sets the error status of the tile loader.
- Parameters
-
status | The initialization error code. |
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