Marble::StackedTileLoader Class Reference

#include <StackedTileLoader.h>

Inheritance diagram for Marble::StackedTileLoader:

Signals
void	cleared ()
void	tileLoaded (TileId const &tileId)

Public Member Functions
	StackedTileLoader (MergedLayerDecorator *mergedLayerDecorator, QObject *parent=0)
virtual	~StackedTileLoader ()
void	cleanupTilehash ()
void	clear ()
const StackedTile *	loadTile (TileId const &stackedTileId)
void	resetTilehash ()
void	setVolatileCacheLimit (quint64 kiloBytes)
int	tileColumnCount (int level) const
int	tileCount () const
GeoSceneTextureTile::Projection	tileProjection () const
int	tileRowCount (int level) const
QSize	tileSize () const
void	updateTile (TileId const &tileId, QImage const &tileImage)
QList< TileId >	visibleTiles () const
quint64	volatileCacheLimit () const

Detailed Description

Tile loading from a quad tree.

This class loads tiles into memory. For faster access we keep the tileIDs and their respective pointers to the tiles in a hashtable. The class also contains convenience methods to remove entries from the hashtable and to return more detailed properties about each tile level and their tiles.

Author

Torsten Rahn rahn@.nosp@m.kde..nosp@m.org

Definition at line 59 of file StackedTileLoader.h.

Constructor & Destructor Documentation

Marble::StackedTileLoader::StackedTileLoader ( MergedLayerDecorator *  mergedLayerDecorator, QObject *  parent = 0  )

explicit

Creates a new tile loader.

Parameters

downloadManager

The download manager that shall be used to fetch the tiles from a remote resource.

Definition at line 59 of file StackedTileLoader.cpp.

Marble::StackedTileLoader::~StackedTileLoader ( )

virtual

Definition at line 65 of file StackedTileLoader.cpp.

Member Function Documentation

void Marble::StackedTileLoader::cleanupTilehash

(

)

Cleans up the internal tile hash.

Removes all superfluous tiles from the hash.

Definition at line 101 of file StackedTileLoader.cpp.

void Marble::StackedTileLoader::clear

(

)

Effectively triggers a reload of all tiles that are currently in use and clears the tile cache in physical memory.

Definition at line 210 of file StackedTileLoader.cpp.

void Marble::StackedTileLoader::cleared ( )

signal

const StackedTile * Marble::StackedTileLoader::loadTile

(

TileId const &

stackedTileId

)

Loads a tile and returns it.

Parameters

stackedTileId

The Id of the requested tile, containing the x and y coordinate and the zoom level.

Definition at line 119 of file StackedTileLoader.cpp.

void Marble::StackedTileLoader::resetTilehash

(

)

Resets the internal tile hash.

Definition at line 91 of file StackedTileLoader.cpp.

void Marble::StackedTileLoader::setVolatileCacheLimit

(

quint64

kiloBytes

)

Set the limit of the volatile (in RAM) cache.

Parameters

bytes

The limit in kilobytes.

Definition at line 183 of file StackedTileLoader.cpp.

int Marble::StackedTileLoader::tileColumnCount

(

int

level

)

const

Definition at line 71 of file StackedTileLoader.cpp.

int Marble::StackedTileLoader::tileCount

(

)

const

Return the number of tiles in the cache.

Returns

number of tiles in cache

Definition at line 178 of file StackedTileLoader.cpp.

void Marble::StackedTileLoader::tileLoaded ( TileId const &  tileId )

signal

GeoSceneTiled::Projection Marble::StackedTileLoader::tileProjection

(

)

const

Definition at line 81 of file StackedTileLoader.cpp.

int Marble::StackedTileLoader::tileRowCount

(

int

level

)

const

Definition at line 76 of file StackedTileLoader.cpp.

QSize Marble::StackedTileLoader::tileSize

(

)

const

Definition at line 86 of file StackedTileLoader.cpp.

void Marble::StackedTileLoader::updateTile	(	TileId const &	tileId,
		QImage const &	tileImage
	)

Definition at line 189 of file StackedTileLoader.cpp.

QList< TileId > Marble::StackedTileLoader::visibleTiles

(

)

const

Reloads the tiles that are currently displayed.

Definition at line 173 of file StackedTileLoader.cpp.

quint64 Marble::StackedTileLoader::volatileCacheLimit

(

)

const

Returns the limit of the volatile (in RAM) cache.

Returns

the cache limit in kilobytes

Definition at line 168 of file StackedTileLoader.cpp.

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The documentation for this class was generated from the following files:

• StackedTileLoader.h
• StackedTileLoader.cpp