Qt Location QML 类型

概述

Provided that a position has been obtained, this module can add a Map with Places of Interest (POI) and Places . The user can be made aware of nearby features and related information, displayed graphically. Features on the Map can be places of business, entertainment, and so on. They may include paths, roads, or forms of transport, enabling navigation optimization and assistance.

To perform navigation we need Route s from start to destination. These routes are made up of segments, where each RouteSegment can be considered a navigation subtask: drive 100 meters, turn left. The beginning and end of each segment is a waypoint , that is, one part of our journey.

A typical use case for the API is a user looking for a particular type of place, say a restaurant. The user could enter a search string into the map application and respond to a list or display of results for restaurants "near" the device. The application could then be used to navigate to the restaurant using an optimized route that is aware of features in the environment that can help or hinder the journey. The navigation then proceeds with the user's progress monitored by means of the current 定位 . In the context of this API the map application would be aware of the location and size of various places and the location of the user. Plugins would supply the data required by the application to determine routes and navigation instructions. The Place types would hold information about the destination and surrounding objects including displayable representations. The Map type would enable this information to be displayed, panned, zoomed and so on. The Route would be determined by a plugin with each RouteSegment holding the navigation instructions guided by the updated current 定位 .

Plugin s are a means of specifying which location-based service to use. For example, a plugin may allow connection to a provider's service that provides geocoding and routing information, which can be consumed by the application. There may be various GeoServices plugins for various tasks with some plugins providing more than one service. One QML Plugin must be created for each required GeoService plugin. Plugins are required for maps, routing and geocoding, and places, however the default plugin handles all four of these services. A plugin may require online access or may support on-board maps and data.

注意： Plugins may not provide features such as paging or relevance hints.

The following links provide more detailed information about maps and places:

Maps and Navigation	Displaying maps and finding routes.
Places	Searching for and managing points of interest.

Common QML Types

Plugin	Type describes a Location based services plugin
PluginParameter	Type describes a parameter to a Plugin

Maps QML Types

MapCircle	Type displays a geographic circle on a Map
Map	Type displays a map
MapCopyrightNotice	Item displays the current valid copyright notice for a Map element
MapItemGroup	Type is a container for map items
MapItemView	Used to populate Map from a model
MapParameter	Type represents a parameter for a Map element. This type provides a mean to specify plugin-dependent optional parameters for a map
MapQuickItem	Type displays an arbitrary Qt Quick object on a Map
MapType	Type holds information about a map type
MapPolygon	Type displays a polygon on a Map
MapPolyline	Type displays a polyline on a map
MapRectangle	Type displays a rectangle on a Map
MapRoute	Type displays a Route on a Map
MapGestureArea	Type provides Map gesture interaction
MapPinchEvent	Type provides basic information about pinch event

RouteManeuver	Type represents the information relevant to the point at which two RouteSegments meet
Route	Type represents one geographical route
RouteModel	Type provides access to routes
RouteQuery	Type is used to provide query parameters to a RouteModel
RouteSegment	Type represents a segment of a Route

Geocoding QML Types

GeocodeModel

Type provides support for searching operations related to geographic information

Places QML Types

Category	Type represents a category that a Place can be associated with
ContactDetail	Type holds a contact detail such as a phone number or a website address
ContactDetails	Type holds contact details for a Place
Place	Type represents a location that is a position of interest
ExtendedAttributes	Type holds additional data about a Place
PlaceAttribute	Type holds generic place attribute information
EditorialModel	Type provides a model of place editorials
图标	Type represents an icon image source which can have multiple sizes
ImageModel	Type provides a model of place images
User	Type identifies a user who contributed a particular Place content item
Ratings	Type holds place rating information
ReviewModel	Provides access to reviews of a Place
PlaceSearchModel	Provides access to place search results
PlaceSearchSuggestionModel	Provides access to search term suggestions
Supplier	Holds data regarding the supplier of a place, a place's image, review, or editorial
CategoryModel	Type provides a model of the categories supported by a Plugin

Alphabetical Listing of All QML Types

MapCircle	Type displays a geographic circle on a Map
GeocodeModel	Type provides support for searching operations related to geographic information
RouteManeuver	Type represents the information relevant to the point at which two RouteSegments meet
Map	Type displays a map
MapCopyrightNotice	Item displays the current valid copyright notice for a Map element
MapItemGroup	Type is a container for map items
MapItemView	Used to populate Map from a model
MapParameter	Type represents a parameter for a Map element. This type provides a mean to specify plugin-dependent optional parameters for a map
MapQuickItem	Type displays an arbitrary Qt Quick object on a Map
MapType	Type holds information about a map type
Route	Type represents one geographical route
RouteModel	Type provides access to routes
RouteQuery	Type is used to provide query parameters to a RouteModel
RouteSegment	Type represents a segment of a Route
Plugin	Type describes a Location based services plugin
PluginParameter	Type describes a parameter to a Plugin
MapPolygon	Type displays a polygon on a Map
MapPolyline	Type displays a polyline on a map
MapRectangle	Type displays a rectangle on a Map
MapRoute	Type displays a Route on a Map
MapGestureArea	Type provides Map gesture interaction
MapPinchEvent	Type provides basic information about pinch event
Category	Type represents a category that a Place can be associated with
ContactDetail	Type holds a contact detail such as a phone number or a website address
ContactDetails	Type holds contact details for a Place
Place	Type represents a location that is a position of interest
ExtendedAttributes	Type holds additional data about a Place
PlaceAttribute	Type holds generic place attribute information
EditorialModel	Type provides a model of place editorials
图标	Type represents an icon image source which can have multiple sizes
ImageModel	Type provides a model of place images
User	Type identifies a user who contributed a particular Place content item
Ratings	Type holds place rating information
ReviewModel	Provides access to reviews of a Place
PlaceSearchModel	Provides access to place search results
PlaceSearchSuggestionModel	Provides access to search term suggestions
Supplier	Holds data regarding the supplier of a place, a place's image, review, or editorial
CategoryModel	Type provides a model of the categories supported by a Plugin

内容