The Navigator type offers functionalities to perform turn-by-turn navigation. 更多...
import 语句: | import Qt.labs.location 1.0 |
The Navigator purpose is to use a plugin's turn-by-turn navigation implementation in a QML application in a seamless manner. This object may take control of the map position, orientation, tilting and zoom, as well as changing the map style, elements on the map such as direction information. In certain cases, it may also restrict user interaction with the Map and with the items on it.
active : bool |
This property tells whether the Navigator is navigating or not. Set this property to
true
to start the navigation. Set it to
false
to stop an active navigation session.
automaticReroutingEnabled : bool |
This property tells whether the Navigator should automatically recalculate the route when the position from
positionSource
ends too far from the route. The operation performed in such case is equivalent to calling
recalculateRoutes
。默认值为
true
.
注意: Whether this property has any effect is plugin-dependent. Also, whether or not it has an effect while the navigator is active is plugin-dependent.
directions group |
---|
[read-only] directions.currentRoute : Route |
[read-only] directions.currentRouteLeg : RouteLeg |
[read-only] directions.currentSegment : int |
[read-only] directions.distanceToNextManeuver : real |
[read-only] directions.remainingTravelDistance : real |
[read-only] directions.remainingTravelDistanceToNextWaypoint : real |
[read-only] directions.remainingTravelTime : int |
[read-only] directions.remainingTravelTimeToNextWaypoint : int |
[read-only] directions.timeToNextManeuver : int |
[read-only] directions.traveledDistance : real |
[read-only] directions.traveledTime : int |
These read-only properties are part of the directions property group. This property group holds the navigation progress information that can be used to access the route data and to extract directions.
注意: Some backends might not provide a full set of navigation progress information.
nextManeuverIcon
property holds the next turn icon.
distanceToNextManeuver
property holds the distance to the next maneuver, in meters.
remainingTravelDistance
property holds the remaining travel distance, in meters.
remainingTravelDistanceToNextWaypoint
property holds the remaining travel distance to the next waypoint, in meters.
traveledDistance
property holds the traveled distance, in meters.
timeToNextManeuver
property holds the time to the next maneuver, in milliseconds.
remainingTravelTime
property holds the remaining travel time, in milliseconds.
remainingTravelTimeToNextWaypoint
property holds the remaining travel time to the next waypoint, in milliseconds.
traveledTime
property holds the traveled time, in milliseconds.
currentRoute
property holds the current route the navigator is following. This can be the same as
route
, or can be different, if the navigator cannot follow the user-specified route. For example, if the position coming from
positionSource
is considerably off route, the navigation engine may recalculate and start to follow a new route.
currentRouteLeg
property holds the current route leg the navigator is following. This is always a part of
currentRoute
, so the
overallRoute
property of
currentRouteLeg
holds the same route as
currentRoute
.
currentSegment
property holds the index of the current
RouteSegment
在
currentRoute
.
alternativeRoutes
property holds the list of alternative routes provided by the engine. If no alternative routes are present, the model will be empty.
另请参阅 directions.waypointReached() , directions.destinationReached() , Route , RouteLeg , RouteSegment ,和 Waypoint .
[read-only] error : enumeration |
This read-only property holds the latest error value of the geocoding request.
常量 | 描述 |
---|---|
Navigator.NoError
|
没有出现错误。 |
Navigator.NotSupportedError
|
Navigation is not supported by the service provider. |
Navigator.ConnectionError
|
An error occurred while communicating with the service provider. |
Navigator.LoaderError
|
The geoservice provider library could not be loaded. Setting QT_DEBUG_PLUGINS environment variable may help diagnosing the problem. |
Navigator.UnknownParameterError
|
An unknown parameter was specified. |
Navigator.MissingRequiredParameterError
|
Required parameter was not specified. |
Navigator.UnknownError
|
Unknown error occurred. |
isOnRoute : bool |
While the Navigator is in active tracking mode, this property tells whether the position from positionSource is on the route or not.
map : Map |
This property holds the Map that the navigator is in charge of controlling.
This is a write-once property. Once the Navigator has a Map associated with it, any attempted modifications of the map property will be ignored.
另请参阅 Map .
: |
This read-only property tells whether the navigator is ready to start the navigation or not. A Navigator becomes ready once the plugin is attached and a navigation engine has been instantiated, and the other required properties are set to valid values.
plugin : Plugin |
This property holds the plugin which provides the navigation functionality.
This is a write-once property. Once the Navigator has a plugin associated with it, any attempted modifications of the plugin property will be ignored.
另请参阅 Plugin .
positionSource : PositionSource |
此特性保持 PositionSource that the navigator will receive position updates from to perform the navigation.
This is a write-once property. Once the Navigator has a PositionSource associated with it, any attempted modifications of the positionSource property will be ignored.
另请参阅 PositionSource .
route : Route |
This property holds the Route that the navigator is using to perform the navigation.
注意: Setting this property while a navigation session is ongoing will stop the navigation.
另请参阅 Route .
trackPositionSource : bool |
This property tells whether the Navigator should control the Map camera to keep track of position source updates. This property is enabled (
true
) by default, and setting it to
false
is useful in cases where e.g. the user starts gesturing over the map area.
Navigator plugins can also control this property directly e.g. user map interaction could trigger the property change. Honoring the user-specified value of this property is plugin dependent.
This signal is emitted when the last waypoint of the route, the destination, has been reached.
注意:
相应处理程序是
directions.onDestinationReached
.
另请参阅 directions and directions.waypointReached() .
directions.waypointReached ( Waypoint waypoint ) |
This signal is emitted when a waypoint has been reached.
注意:
相应处理程序是
directions.onWaypointReached
.
另请参阅 directions and directions.destinationReached() .
Calling this method forces the backend to trigger a routes recalculation.
另请参阅 automaticReroutingEnabled .