DataSource#

class DataSource(**properties: Any)#

Superclasses: Object

Subclasses: TileDownloader

The base class used to retrieve tiles as Bytes.

Methods#

class DataSource
do_get_tile_data_async(self, x: int, y: int, zoom_level: int, cancellable: Cancellable | None = None, callback: Callable[[Object | None, AsyncResult, Any], None] | None = None, user_data: Any = None) → None#
Parameters:

  • x

  • y

  • zoom_level

  • cancellable

  • callback

  • user_data

do_get_tile_data_finish(self, result: AsyncResult) → Bytes | None#
Parameters:

result

do_start_request(self, x: int, y: int, zoom_level: int, cancellable: Cancellable | None = None) → DataSourceRequest#
Parameters:

  • x

  • y

  • zoom_level

  • cancellable

get_max_zoom_level() → int#

Gets the data source’s maximum zoom level.

Added in version 1.1.

get_min_zoom_level() → int#

Gets the data source’s minimum zoom level.

Added in version 1.1.

get_tile_data_async(x: int, y: int, zoom_level: int, cancellable: Cancellable | None = None, callback: Callable[[Object | None, AsyncResult, Any], None] | None = None, user_data: Any = None) → None#

Gets the data for the tile at the given coordinates.

Some data sources may return data multiple times. For example, TileDownloader may return data from a cache, then return updated data from the network. received_data is emitted each time data is received, then callback is called after the last update.

Parameters:

  • x – the X coordinate to fetch

  • y – the Y coordinate to fetch

  • zoom_level – the Z coordinate to fetch

  • cancellable – a Cancellable

  • callback – a AsyncReadyCallback to execute upon completion

  • user_data – closure data for callback

get_tile_data_finish(result: AsyncResult) → Bytes | None#

Gets the final result of a request started with get_tile_data_async().

Parameters:

result – a AsyncResult provided to callback

set_max_zoom_level(zoom_level: int) → None#

Sets the data source’s maximum zoom level.

Added in version 1.1.

Parameters:

zoom_level – the maximum zoom level

set_min_zoom_level(zoom_level: int) → None#

Sets the data source’s minimum zoom level.

Added in version 1.1.

Parameters:

zoom_level – the minimum zoom level

start_request(x: int, y: int, zoom_level: int, cancellable: Cancellable | None = None) → DataSourceRequest#

Begins a request for a tile.

Added in version 1.1.

Parameters:

  • x – X coordinate to request

  • y – Y coordinate to request

  • zoom_level – zoom level to request

  • cancellable – for cancelling the request

Properties#

class DataSource
props.max_zoom_level: int#

The type of the None singleton.

Added in version 1.1.

props.min_zoom_level: int#

The type of the None singleton.

Added in version 1.1.

Signals#

class DataSource.signals
received_data(x: int, y: int, zoom_level: int, bytes: Bytes) → None#

The type of the None singleton.

Deprecated since version 1.1: Use start_request and connect to the notify signals of the resulting DataSourceRequest.

Parameters:

  • x – the X coordinate of the tile

  • y – the Y coordinate of the tile

  • zoom_level – the zoom level of the tile

  • bytes – the received data

Virtual Methods#

class DataSource
do_get_tile_data_async(x: int, y: int, zoom_level: int, cancellable: Cancellable | None = None, callback: Callable[[Object | None, AsyncResult, Any], None] | None = None, user_data: Any = None) → None#

Gets the data for the tile at the given coordinates.

Some data sources may return data multiple times. For example, TileDownloader may return data from a cache, then return updated data from the network. received_data is emitted each time data is received, then callback is called after the last update.

Parameters:

  • x – the X coordinate to fetch

  • y – the Y coordinate to fetch

  • zoom_level – the Z coordinate to fetch

  • cancellable – a Cancellable

  • callback – a AsyncReadyCallback to execute upon completion

  • user_data – closure data for callback

do_get_tile_data_finish(result: AsyncResult) → Bytes | None#

Gets the final result of a request started with get_tile_data_async().

Parameters:

result – a AsyncResult provided to callback

do_start_request(x: int, y: int, zoom_level: int, cancellable: Cancellable | None = None) → DataSourceRequest#

Begins a request for a tile.

Added in version 1.1.

Parameters:

  • x – X coordinate to request

  • y – Y coordinate to request

  • zoom_level – zoom level to request

  • cancellable – for cancelling the request

Fields#

class DataSource
parent_instance#