KDE API Referencemarble
#include <Tile.h>
Public Member Functions | |
| Tile (TileId const &tileId) | |
| virtual | ~Tile () |
| TileId const & | id () const |
Detailed Description
A class that resembles a tile (then it is extended to TextureTile or Vectortile).
A tile provides a bitmap image or vector data for a certain (geographic) area and for a given zoom level. Each Tile can be identified via a unique TileId.
A stack of Tiles that cover the same area and the same zoom level can be stored (and painted) layer by layer in a StackedTile object. For this purpose each Texture Tile specifies a blending type.
Usually the tiles are organized in so called quad tiles: This means that with increasing zoom level four other tiles cover the same area as a single "parent" tile in the previous zoom level. These four tiles have the same pixel size as the "parent" tile.
The process of "filling the tile with data is done in stages: The State describes the current progress of loading the data (Empty, Scaled, Expired, StateUptodate).
The life time cycle of a Tile can also be influenced by its expiration time which will trigger a reload of the tile data.
Constructor & Destructor Documentation
Member Function Documentation
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