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Qt Location GeoServices

The Qt Location provides the majority of its functionality through GeoService plugins. This document outlines how to develop a new GeoService plugin.

Implementing Plugins

A plugin implementer needs to subclass QGeoServiceProviderFactory and as many of the ManagerEngine classes as they want to provide implementations for.

Subclassing QGeoServiceProviderFactory will only involve exposing a name and a version by overriding QGeoServiceProviderFactory::providerName() and QGeoServiceProviderFactory::providerVersion(), and overriding QGeoServiceProviderFactory::createSearchManagerEngine(), QGeoServiceProviderFactory::createMappingManagerEngine() and QGeoServiceProviderFactory::createRoutingManagerEngine() as appropriate.

Tile-Based Map Convenience Classes

Most of the current tile based mapping APIs are very similar, and so we provide a number of classes intended to make writing tile based mapping plugins much simpler.

If the Mercator projection and the most common tile addressing scheme is used this will mainly involve subclassing QGeoTiledMappingManagerEngine and providing an implementation of QGeoTiledMappingManagerEngine::getTileImage().

GeoService Classes

QGeoCameraCapabilities	Describes the limitations on camera settings imposed by a mapping plugin
QGeoMappingManagerEngine
QGeoPositionInfoSourceFactory	Factory class used as the plugin interface for external providers of positioning data
QGeoRoutingManagerEngine	Interface and convenience methods to implementers of QGeoServiceProvider plugins who want to provide access to geographic routing information
QGeoServiceProviderFactory	Factory class used as the plugin interface for services related to geographical information
QGeoTiledMapReply	Manages a tile fetch operation started by an instance of QGeoTiledManagerEngine
QGeocodingManagerEngine	Interface and convenience methods to implementers of QGeoServiceProvider plugins who want to provide support for geocoding operations
QPlaceManagerEngine	Interface for implementers of QGeoServiceProvider plugins who want to provide access to place functionality

The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation.

Documentation sources may be obtained from www.qt-project.org.

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