QGeoServiceProvider ¶

概要 ¶

详细描述 ¶

The Maps and Navigation API allows people to access various kinds of geographical information, including functionality to perform geocoding, routing and the display of maps. The QGeoServiceProvider aggregates the access to a set of these services that are provided by a single vendor.

It is possible to mix and match service providers for the various domains, so that a geocoding manager from one service provider can be used with a geographic routing manager from another service provider.

This is not recommended unless the client is able to verify that the data provided by the different services are compatible, as differences in the underlying data sets could cause serious incongruences between the services.

子类化的 QGeoServiceProvider guarantee that the different services that they provide are interoperable.

At this point there are two GeoServices plugins packaged with Qt. They are accessible using their provider names:

• “mapbox” -> Mapbox service

• “here” -> HERE Services

• “osm” -> OpenStreetMap Services

• “esri” -> ESRI Services

Each service provider must follow a naming convention for their service specific parameter names/keys. They use the provider name as prefix for all their parameter names. For example, the HERE service provider requires the here.app_id parameter. When a provider is loaded only those parameters are passed on whose parameter names start with the provider name. This avoids the sharing sensitive parameters such as confidential token or app_id parameters with other plugins.

Please check the GeoServices plugin specific documentation to obtain a complete list of the available parameter names/keys and values.

class QGeoServiceProvider ( providerName [ , parameters=QVariantMap() [ , allowExperimental=false ] ] ) ¶

param providerName

unicode

param allowExperimental

bool

param parameters

构造 QGeoServiceProvider whose backend has the name providerName ，使用提供 参数 .

If multiple plugins have the same providerName , the plugin with the highest reported providerVersion() will be used.

若 allowExperimental is true then plugins marked as experimental may be used. By default experimental plugins are not considered.

If no plugin matching providerName was able to be loaded then error() and errorString() will provide details about why this is the case.

注意

Before the list of 参数 is passed on to the to-be-loaded provider plugin, the list is filtered to avoid the sharing of plugin specific parameters with unrelated provider plugins. Plugin specific parameter keys must be prefixed with the provider name (e.g. here.app_id ).

PySide2.QtLocation.QGeoServiceProvider. Error ¶

Describes an error related to the loading and setup of a service provider plugin.

常量	描述
QGeoServiceProvider.NoError	没有发生错误。
QGeoServiceProvider.NotSupportedError	The plugin does not support this functionality.
QGeoServiceProvider.UnknownParameterError	The plugin did not recognize one of the parameters it was given.
QGeoServiceProvider.MissingRequiredParameterError	The plugin did not find one of the parameters it was expecting.
QGeoServiceProvider.ConnectionError	The plugin could not connect to its backend service or database.
QGeoServiceProvider.LoaderError	The plugin failed to load.

PySide2.QtLocation.QGeoServiceProvider. RoutingFeature ¶

Describes the routing features supported by the geo service provider.

常量	描述
QGeoServiceProvider.NoRoutingFeatures	No routing features are supported.
QGeoServiceProvider.OnlineRoutingFeature	Online routing is supported.
QGeoServiceProvider.OfflineRoutingFeature	Offline routing is supported.
QGeoServiceProvider.LocalizedRoutingFeature	Supports returning routes with localized addresses and instructions.
QGeoServiceProvider.RouteUpdatesFeature	Updating an existing route based on the current position is supported.
QGeoServiceProvider.AlternativeRoutesFeature	Supports returning alternative routes.
QGeoServiceProvider.ExcludeAreasRoutingFeature	Supports specifying a areas which the returned route must not cross.
QGeoServiceProvider.AnyRoutingFeatures	Matches a geo service provider that provides any routing features.

PySide2.QtLocation.QGeoServiceProvider. GeocodingFeature ¶

Describes the geocoding features supported by the geo service provider.

常量	描述
QGeoServiceProvider.NoGeocodingFeatures	No geocoding features are supported.
QGeoServiceProvider.OnlineGeocodingFeature	Online geocoding is supported.
QGeoServiceProvider.OfflineGeocodingFeature	Offline geocoding is supported.
QGeoServiceProvider.ReverseGeocodingFeature	Reverse geocoding is supported.
QGeoServiceProvider.LocalizedGeocodingFeature	Supports returning geocoding results with localized addresses.
QGeoServiceProvider.AnyGeocodingFeatures	Matches a geo service provider that provides any geocoding features.

PySide2.QtLocation.QGeoServiceProvider. MappingFeature ¶

Describes the mapping features supported by the geo service provider.

常量	描述
QGeoServiceProvider.NoMappingFeatures	No mapping features are supported.
QGeoServiceProvider.OnlineMappingFeature	Online mapping is supported.
QGeoServiceProvider.OfflineMappingFeature	Offline mapping is supported.
QGeoServiceProvider.LocalizedMappingFeature	Supports returning localized map data.
QGeoServiceProvider.AnyMappingFeatures	Matches a geo service provider that provides any mapping features.

PySide2.QtLocation.QGeoServiceProvider. PlacesFeature ¶

Describes the places features supported by the geo service provider.

常量	描述
QGeoServiceProvider.NoPlacesFeatures	No places features are supported.
QGeoServiceProvider.OnlinePlacesFeature	Online places is supported.
QGeoServiceProvider.OfflinePlacesFeature	Offline places is supported.
QGeoServiceProvider.SavePlaceFeature	Saving places is supported.
QGeoServiceProvider.RemovePlaceFeature	Removing or deleting places is supported.
QGeoServiceProvider.SaveCategoryFeature	Saving categories is supported.
QGeoServiceProvider.RemoveCategoryFeature	Removing or deleting categories is supported.
QGeoServiceProvider.PlaceRecommendationsFeature	Searching for recommended places similar to another place is supported.
QGeoServiceProvider.SearchSuggestionsFeature	Search suggestions is supported.
QGeoServiceProvider.LocalizedPlacesFeature	Supports returning localized place data.
QGeoServiceProvider.NotificationsFeature	Notifications of place and category changes is supported.
QGeoServiceProvider.PlaceMatchingFeature	Supports matching places from two different geo service providers.
QGeoServiceProvider.AnyPlacesFeatures	Matches a geo service provider that provides any places features.

PySide2.QtLocation.QGeoServiceProvider. NavigationFeature ¶

Describes the navigation features supported by the geo service provider.

常量	描述
QGeoServiceProvider.NoNavigationFeatures	No navigation features are supported.
QGeoServiceProvider.OnlineNavigationFeature	Online navigation is supported.
QGeoServiceProvider.OfflineNavigationFeature	Offline navigation is supported.
QGeoServiceProvider.AnyNavigationFeatures	Matches a geo service provider that provides any navigation features.

static PySide2.QtLocation.QGeoServiceProvider. availableServiceProviders ( ) ¶

返回类型

字符串列表

Returns a list of names of the available service providers, for use with the QGeoServiceProvider 构造函数。

PySide2.QtLocation.QGeoServiceProvider. error ( ) ¶

返回类型

Error

Returns an error code describing the error which occurred during the last operation that was performed by this class.

PySide2.QtLocation.QGeoServiceProvider. errorString ( ) ¶

返回类型

unicode

Returns a string describing the error which occurred during the last operation that was performed by this class.

PySide2.QtLocation.QGeoServiceProvider. geocodingError ( ) ¶

返回类型

Error

Returns an error code describing the error which occurred during the last attempt to create a geocoding manager.

PySide2.QtLocation.QGeoServiceProvider. geocodingErrorString ( ) ¶

返回类型

unicode

Returns a string describing the error which occurred during the last attempt to create a geocoding manager.

PySide2.QtLocation.QGeoServiceProvider. geocodingFeatures ( ) ¶

返回类型

GeocodingFeatures

Returns the geocoding features supported by the geo service provider.

PySide2.QtLocation.QGeoServiceProvider. geocodingManager ( ) ¶

返回类型

QGeoCodingManager

返回 QGeoCodingManager made available by the service provider.

This function will return 0 if the service provider does not provide any geocoding services.

This function will attempt to construct a QGeoCodingManager instance when it is called for the first time. If the attempt is successful the QGeoCodingManager will be cached, otherwise each call of this function will attempt to construct a QGeoCodingManager instance until the construction is successful.

QGeoCodingManager is owned by this QGeoServiceProvider and should not be deleted separately. Users should assume that deleting the QGeoServiceProvider renders the pointer returned by this method invalid.

After this function has been called, error() and errorString() will report any errors which occurred during the construction of the QGeoCodingManager .

PySide2.QtLocation.QGeoServiceProvider. mappingError ( ) ¶

返回类型

Error

Returns an error code describing the error which occurred during the last attempt to create a mapping manager.

PySide2.QtLocation.QGeoServiceProvider. mappingErrorString ( ) ¶

返回类型

unicode

Returns a string describing the error which occurred during the last attempt to create a mapping manager.

PySide2.QtLocation.QGeoServiceProvider. mappingFeatures ( ) ¶

返回类型

MappingFeatures

Returns the mapping features supported by the geo service provider.

PySide2.QtLocation.QGeoServiceProvider. navigationError ( ) ¶

返回类型

Error

Returns an error code describing the error which occurred during the last attempt to create a navigation manager.

PySide2.QtLocation.QGeoServiceProvider. navigationErrorString ( ) ¶

返回类型

unicode

Returns a string describing the error which occurred during the last attempt to create a navigation manager.

PySide2.QtLocation.QGeoServiceProvider. navigationFeatures ( ) ¶

返回类型

NavigationFeatures

Returns the navigation features supported by the geo service provider.

PySide2.QtLocation.QGeoServiceProvider. placeManager ( ) ¶

返回类型

QPlaceManager

返回 QPlaceManager made available by the service provider.

This function will attempt to construct a QPlaceManager instance when it is called for the first time. If the attempt is successful the QPlaceManager will be cached, otherwise each call of this function will attempt to construct a QPlace instance until the construction is successful.

The QGeoPlaceManager is owned by this QGeoServiceProvider and should not be deleted separately. Users should assume that deleting the QGeoServiceProvider renders the pointer returned by this method invalid.

After this function has been called, error() and errorString() will report any errors which occurred during the construction of the QPlaceManager .

PySide2.QtLocation.QGeoServiceProvider. placesError ( ) ¶

返回类型

Error

Returns an error code describing the error which occurred during the last attempt to create a places manager.

PySide2.QtLocation.QGeoServiceProvider. placesErrorString ( ) ¶

返回类型

unicode

Returns a string describing the error which occurred during the last attempt to create a places manager.

PySide2.QtLocation.QGeoServiceProvider. placesFeatures ( ) ¶

返回类型

PlacesFeatures

Returns the places features supported by the geo service provider.

PySide2.QtLocation.QGeoServiceProvider. routingError ( ) ¶

返回类型

Error

Returns an error code describing the error which occurred during the last attempt to create a routing manager.

PySide2.QtLocation.QGeoServiceProvider. routingErrorString ( ) ¶

返回类型

unicode

Returns a string describing the error which occurred during the last attempt to create a routing manager.

PySide2.QtLocation.QGeoServiceProvider. routingFeatures ( ) ¶

返回类型

RoutingFeatures

Returns the routing features supported by the geo service provider.

PySide2.QtLocation.QGeoServiceProvider. routingManager ( ) ¶

返回类型

QGeoRoutingManager

返回 QGeoRoutingManager made available by the service provider.

This function will return 0 if the service provider does not provide any geographic routing services.

This function will attempt to construct a QGeoRoutingManager instance when it is called for the first time. If the attempt is successful the QGeoRoutingManager will be cached, otherwise each call of this function will attempt to construct a QGeoRoutingManager instance until the construction is successful.

QGeoRoutingManager is owned by this QGeoServiceProvider and should not be deleted separately. Users should assume that deleting the QGeoServiceProvider renders the pointer returned by this method invalid.

After this function has been called, error() and errorString() will report any errors which occurred during the construction of the QGeoRoutingManager .

PySide2.QtLocation.QGeoServiceProvider. setAllowExperimental ( allow ) ¶

参数

allow – bool

Sets whether experimental plugins are considered when locating the correct plugin library for this service provider to allow .

Important: this will destroy any existing managers held by this service provider instance. You should be sure not to attempt to use any pointers that you have previously retrieved after calling this method.

PySide2.QtLocation.QGeoServiceProvider. setLocale ( locale ) ¶

参数

locale – QLocale

Sets the locale used by this service provider to locale . If the relevant features (see LocalizedMappingFeature etc), this will change the languages, units and other locale-specific attributes of the provider’s data.

PySide2.QtLocation.QGeoServiceProvider. setParameters ( 参数 ) ¶

参数

参数 –

Sets the parameters used to construct individual manager classes for this service provider to 参数 .

Before the list of 参数 is passed on to the to-be-loaded service provider, the list is filtered to avoid the sharing of provider specific parameters with unrelated service providers. Provider specific parameter keys must be prefixed with the provider name (e.g. here.app_id ).

Important: this will destroy any existing managers held by this service provider instance. You should be sure not to attempt to use any pointers that you have previously retrieved after calling this method.

PySide2.QtLocation.QGeoServiceProvider. setQmlEngine ( engine ) ¶

参数

engine – QQmlEngine