ChamplainNetworkTileSource: libchamplain Reference Manual

## ChamplainNetworkTileSource ChamplainNetworkTileSource — A map source that downloads tile data from a web server |

## Functions

ChamplainNetworkTileSource * | champlain_network_tile_source_new_full ()
void | champlain_network_tile_source_set_uri_format ()
const gchar * | champlain_network_tile_source_get_uri_format ()
void | champlain_network_tile_source_set_offline ()
gboolean | champlain_network_tile_source_get_offline ()
void | champlain_network_tile_source_set_proxy_uri ()
const gchar * | champlain_network_tile_source_get_proxy_uri ()
void | champlain_network_tile_source_set_max_conns ()
gint | champlain_network_tile_source_get_max_conns ()
void | champlain_network_tile_source_set_user_agent ()

## Properties

gint | max-conns | Read / Write
gboolean | offline | Read / Write
gchar * | proxy-uri | Read / Write
gchar * | uri-format | Read / Write / Construct
gchar * | user-agent | Write

## Types and Values

struct | ChamplainNetworkTileSource

## Object Hierarchy

        GObject
        ╰── GInitiallyUnowned
            ╰── ChamplainMapSource
                ╰── ChamplainTileSource
                    ╰── ChamplainNetworkTileSource

## Description

This class is specialized for map tiles that can be downloaded from a web server. This includes all web based map services such as OpenStreetMap, Google Maps, Yahoo Maps and more. This class contains all mechanisms necessary to download tiles.

Some preconfigured network map sources are built-in this library, see ChamplainMapSourceFactory.

## Functions

### champlain_network_tile_source_new_full ()

    ChamplainNetworkTileSource *
    champlain_network_tile_source_new_full
                                   (const gchar *id,
                                    const gchar *name,
                                    const gchar *license,
                                    const gchar *license_uri,
                                    guint min_zoom,
                                    guint max_zoom,
                                    guint tile_size,
                                    ChamplainMapProjection projection,
                                    const gchar *uri_format,
                                    ChamplainRenderer *renderer);

Constructor of ChamplainNetworkTileSource.

#### Parameters

id | the map source's id |
name | the map source's name |
license | the map source's license |
license_uri | the map source's license URI |
min_zoom | the map source's minimum zoom level |
max_zoom | the map source's maximum zoom level |
tile_size | the map source's tile size (in pixels) |
projection | the map source's projection |
uri_format | the URI to fetch the tiles from, see champlain_network_tile_source_set_uri_format |
renderer | the ChamplainRenderer used to render tiles |

#### Returns

a constructed ChamplainNetworkTileSource object

Since: 0.4

### champlain_network_tile_source_set_uri_format ()

    void
    champlain_network_tile_source_set_uri_format
                                   (ChamplainNetworkTileSource *tile_source,
                                    const gchar *uri_format);

A URI format is a URI where x, y and zoom level information have been marked for parsing and insertion. There can be an unlimited number of marked items in a URI format. They are delimited by "#" before and after the variable name. There are 4 defined variable names: X, Y, Z, and TMSY for Y in TMS coordinates.

For example, this is the OpenStreetMap URI format: "http://tile.openstreetmap.org/#Z#/#X#/#Y#.png"

#### Parameters

tile_source | the ChamplainNetworkTileSource |
uri_format | the URI format |

Since: 0.4

### champlain_network_tile_source_get_uri_format ()

    const gchar *
    champlain_network_tile_source_get_uri_format
                                   (ChamplainNetworkTileSource *tile_source);

Default constructor of ChamplainNetworkTileSource.

#### Parameters

tile_source | the ChamplainNetworkTileSource |

#### Returns

A URI format used for URI creation when downloading tiles. See `champlain_network_tile_source_set_uri_format()` for more information.

Since: 0.6

### champlain_network_tile_source_set_offline ()

    void
    champlain_network_tile_source_set_offline
                                   (ChamplainNetworkTileSource *tile_source,
                                    gboolean offline);

Sets offline status.

#### Parameters

tile_source | the ChamplainNetworkTileSource |
offline | TRUE when the tile source should be offline; FALSE otherwise |

Since: 0.6

### champlain_network_tile_source_get_offline ()

    gboolean
    champlain_network_tile_source_get_offline
                                   (ChamplainNetworkTileSource *tile_source);

Gets offline status.

#### Parameters

tile_source | the ChamplainNetworkTileSource |

#### Returns

TRUE when the tile source is set to be offline; FALSE otherwise.

Since: 0.6

### champlain_network_tile_source_set_proxy_uri ()

    void
    champlain_network_tile_source_set_proxy_uri
                                   (ChamplainNetworkTileSource *tile_source,
                                    const gchar *proxy_uri);

Override the default proxy for accessing the network.

#### Parameters

tile_source | the ChamplainNetworkTileSource |
proxy_uri | the proxy uri used to access network |

Since: 0.6

### champlain_network_tile_source_get_proxy_uri ()

    const gchar *
    champlain_network_tile_source_get_proxy_uri
                                   (ChamplainNetworkTileSource *tile_source);

Gets the proxy uri used to access network.

#### Parameters

tile_source | the ChamplainNetworkTileSource |

#### Returns

the proxy uri

Since: 0.6

### champlain_network_tile_source_set_max_conns ()

    void
    champlain_network_tile_source_set_max_conns
                                   (ChamplainNetworkTileSource *tile_source,
                                    gint max_conns);

Sets the max number of allowed simultaneous connections for this tile source.

Before changing this remember to verify how many simultaneous connections your tile provider allows you to make.

#### Parameters

tile_source | the ChamplainNetworkTileSource |
max_conns | the number of allowed simultaneous connections |

Since: 0.12.14

### champlain_network_tile_source_get_max_conns ()

    gint
    champlain_network_tile_source_get_max_conns
                                   (ChamplainNetworkTileSource *tile_source);

Gets the max number of allowed simultaneous connections for this tile source.

#### Parameters

tile_source | the ChamplainNetworkTileSource |

#### Returns

the max number of allowed simultaneous connections for this tile source.

Since: 0.12.14

### champlain_network_tile_source_set_user_agent ()

    void
    champlain_network_tile_source_set_user_agent
                                   (ChamplainNetworkTileSource *tile_source,
                                    const gchar *user_agent);

Since: 0.12.16

## Types and Values

### struct ChamplainNetworkTileSource

    struct ChamplainNetworkTileSource;

The ChamplainNetworkTileSource structure contains only private data and should be accessed using the provided API

Since: 0.6

## Property Details

### The `“max-conns”` property

      “max-conns”                gint

Specifies the max number of allowed simultaneous connections for this tile source.

Before changing this remember to verify how many simultaneous connections your tile provider allows you to make.

Flags: Read / Write

Allowed values: >= 1

Default value: 2

Since: 0.12.14

### The `“offline”` property

      “offline”                  gboolean

Specifies whether the network tile source can access network

Flags: Read / Write

Default value: FALSE

Since: 0.4

### The `“proxy-uri”` property

      “proxy-uri”                gchar *

Used to override the default proxy for accessing the network.

Flags: Read / Write

Default value: ""

Since: 0.4

### The `“uri-format”` property

      “uri-format”               gchar *

The uri format of the tile source, see champlain_network_tile_source_set_uri_format

Flags: Read / Write / Construct

Default value: ""

Since: 0.4

### The `“user-agent”` property

      “user-agent”               gchar *

The HTTP user agent used for network requests.

Flags: Write

Default value: "libchamplain/0.12.16"

Since: 0.12.16