QGeoCodingManagerEngine ¶

概要 ¶

详细描述 ¶

In the default implementation, supportsGeocoding() and supportsReverseGeocoding() returns false while geocode() and reverseGeocode() cause UnsupportedOptionError to occur.

If the service provider supports geocoding the subclass should provide an implementation of geocode() and call setSupportsGeocoding(true) at some point in time before geocode() 被调用。

Similarly, if the service provider supports reverse geocoding the subclass should provide an implementation reverseGeocode() and call setSupportsReverseGeocoding(true) at some point in time before reverseGeocode() 被调用。

A subclass of QGeoCodingManagerEngine will often make use of a subclass fo QGeoCodeReply internally, in order to add any engine-specific data (such as a QNetworkReply object for network-based services) to the QGeoCodeReply instances used by the engine.

另请参阅

QGeoCodingManager

class QGeoCodingManagerEngine ( 参数 [ , parent=None ] ) ¶

param parent

QObject

param parameters

Constructs a new engine with the specified parent ，使用 参数 to pass any implementation specific data to the engine.

PySide2.QtLocation.QGeoCodingManagerEngine. error ( reply , error [ , errorString="" ] ) ¶

参数

• reply – QGeoCodeReply

• error – Error

• errorString – unicode

PySide2.QtLocation.QGeoCodingManagerEngine. finished ( reply ) ¶

参数

reply – QGeoCodeReply

PySide2.QtLocation.QGeoCodingManagerEngine. geocode ( address , bounds ) ¶

参数

• address – QGeoAddress

• bounds – QGeoShape

返回类型

QGeoCodeReply

Begins the geocoding of address . Geocoding is the process of finding a coordinate that corresponds to a given address.

A QGeoCodeReply object will be returned, which can be used to manage the geocoding operation and to return the results of the operation.

This engine and the returned QGeoCodeReply object will emit signals indicating if the operation completes or if errors occur.

If supportsGeocoding() returns false an UnsupportedOptionError will occur.

Once the operation has completed, locations() can be used to retrieve the results, which will consist of a list of QGeoLocation objects. These objects represent a combination of coordinate and address data.

The address data returned in the results may be different from address . This will usually occur if the geocoding service backend uses a different canonical form of addresses or if address was only partially filled out.

若 bounds is non-null and a valid QGeoShape it will be used to limit the results to those that are contained by bounds . This is particularly useful if address is only partially filled out, as the service will attempt to geocode all matches for the specified data.

The user is responsible for deleting the returned reply object, although this can be done in the slot connected to finished() , error() , finished() or error() with deleteLater() .

PySide2.QtLocation.QGeoCodingManagerEngine. geocode ( address , limit , offset , bounds ) ¶

参数

• address – unicode

• limit – int

• offset – int

• bounds – QGeoShape

返回类型

QGeoCodeReply

Begins geocoding for a location matching address .

A QGeoCodeReply object will be returned, which can be used to manage the geocoding operation and to return the results of the operation.

This engine and the returned QGeoCodeReply object will emit signals indicating if the operation completes or if errors occur.

Once the operation has completed, locations() can be used to retrieve the results, which will consist of a list of QGeoLocation objects. These objects represent a combination of coordinate and address data.

若 limit is -1 the entire result set will be returned, otherwise at most limit results will be returned.

offset parameter is used to ask the geocoding service to not return the first offset results.

limit and offset results are used together to implement paging.

若 bounds is non-null and a valid QGeoShape it will be used to limit the results to those that are contained by bounds .

The user is responsible for deleting the returned reply object, although this can be done in the slot connected to finished() , error() , finished() or error() with deleteLater() .

PySide2.QtLocation.QGeoCodingManagerEngine. locale ( ) ¶

返回类型

QLocale

Returns the locale used to hint to this geocoding manager about what language to use for the results.

另请参阅

setLocale()

PySide2.QtLocation.QGeoCodingManagerEngine. managerName ( ) ¶

返回类型

unicode

Returns the name which this engine implementation uses to distinguish itself from the implementations provided by other plugins.

The combination of and managerVersion() should be unique amongst plugin implementations.

PySide2.QtLocation.QGeoCodingManagerEngine. managerVersion ( ) ¶

返回类型

int

Returns the version of this engine implementation.

The combination of managerName() and should be unique amongst plugin implementations.

PySide2.QtLocation.QGeoCodingManagerEngine. reverseGeocode ( coordinate , bounds ) ¶

参数

• coordinate – QGeoCoordinate

• bounds – QGeoShape

返回类型

QGeoCodeReply

Begins the reverse geocoding of coordinate . Reverse geocoding is the process of finding an address that corresponds to a given coordinate.

A QGeoCodeReply object will be returned, which can be used to manage the reverse geocoding operation and to return the results of the operation.

This engine and the returned QGeoCodeReply object will emit signals indicating if the operation completes or if errors occur.

If supportsReverseGeocoding() returns false an UnsupportedOptionError will occur.

At that point locations() can be used to retrieve the results, which will consist of a list of QGeoLocation objects. These objects represent a combination of coordinate and address data.

The coordinate data returned in the results may be different from coordinate . This will usually occur if the reverse geocoding service backend shifts the coordinates to be closer to the matching addresses, or if the backend returns results at multiple levels of detail.

If multiple results are returned by the reverse geocoding service backend they will be provided in order of specificity. This normally occurs if the backend is configured to reverse geocode across multiple levels of detail. As an example, some services will return address and coordinate pairs for the street address, the city, the state and the country.

若 bounds is non-null and a valid QGeoShape it will be used to limit the results to those that are contained by bounds .

The user is responsible for deleting the returned reply object, although this can be done in the slot connected to finished() , error() , finished() or error() with deleteLater() .

PySide2.QtLocation.QGeoCodingManagerEngine. setLocale ( locale ) ¶

参数

locale – QLocale

Sets the locale to be used by this manager to locale .

If this geocoding manager supports returning the results in different languages, they will be returned in the language of locale .

The locale used defaults to the system locale if this is not set.

另请参阅

locale()