QGeoRouteSegment Class

The QGeoRouteSegment class represents a segment of a route. 更多...

头：	#include <QGeoRouteSegment>
qmake:	QT += location

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特性

• distance : const qreal
• maneuver : const QGeoManeuver
• path : const QList<QGeoCoordinate>
• travelTime : const int

公共函数

	QGeoRouteSegment ()
	QGeoRouteSegment (const QGeoRouteSegment & other )
	~QGeoRouteSegment ()
qreal	distance () const
bool	isLegLastSegment () const
bool	isValid () const
QGeoManeuver	maneuver () const
QGeoRouteSegment	nextRouteSegment () const
QList<QGeoCoordinate>	path () const
void	setNextRouteSegment (const QGeoRouteSegment & routeSegment )
int	travelTime () const
QGeoRouteSegment &	operator= (const QGeoRouteSegment & other )

相关非成员

bool	operator!= (const QGeoRouteSegment & lhs , const QGeoRouteSegment & rhs )
bool	operator== (const QGeoRouteSegment & lhs , const QGeoRouteSegment & rhs )

详细描述

A QGeoRouteSegment instance has information about the physical layout of the route segment, the length of the route and estimated time required to traverse the route segment and an optional QGeoManeuver associated with the beginning of the route segment.

QGeoRouteSegment instances can be thought of as edges on a routing graph, with QGeoManeuver instances as optional labels attached to the vertices of the graph.

特性文档编制

[read-only] distance : const qreal

This property holds the distance covered by this segment of the route, in meters.

访问函数：

qreal

distance () const

[read-only] maneuver : const QGeoManeuver

This property holds the maneuver for this route segment.

Holds an invalid QGeoManeuver if no information has been attached to the starting point of this route segment.

访问函数：

QGeoManeuver

maneuver () const

[read-only] path : const QList < QGeoCoordinate >

This property holds the geometric shape of this route segment of the route.

The coordinates should be listed in the order in which they would be traversed by someone traveling along this segment of the route.

访问函数：

QList<QGeoCoordinate>

path () const

[read-only] travelTime : const int

This property holds the estimated amount of time, in seconds, that it will take to traverse this segment.

访问函数：

int	travelTime () const

成员函数文档编制

QGeoRouteSegment:: QGeoRouteSegment ()

Constructs an invalid route segment object.

The route segment will remain invalid until one of setNextRouteSegment (), setTravelTime(), setDistance(), setPath() or setManeuver() is called.

[noexcept] QGeoRouteSegment:: QGeoRouteSegment (const QGeoRouteSegment & other )

Constructs a route segment object from the contents of other .

[noexcept] QGeoRouteSegment:: ~QGeoRouteSegment ()

Destroys this route segment object.

bool QGeoRouteSegment:: isLegLastSegment () const

Returns whether this route segment is the last segment of a route leg.

bool QGeoRouteSegment:: isValid () const

Returns whether this route segment is valid or not.

若 nextRouteSegment () is called on the last route segment of a route, the returned value will be an invalid route segment.

QGeoRouteSegment QGeoRouteSegment:: nextRouteSegment () const

Returns the next route segment in the route.

Will return an invalid route segment if this is the last route segment in the route.

另请参阅 setNextRouteSegment ().

void QGeoRouteSegment:: setNextRouteSegment (const QGeoRouteSegment & routeSegment )

Sets the next route segment in the route to routeSegment .

另请参阅 nextRouteSegment ().

[noexcept] QGeoRouteSegment &QGeoRouteSegment:: operator= (const QGeoRouteSegment & other )

赋值 other to this route segment object and then returns a reference to this route segment object.

相关非成员

[noexcept] bool operator!= (const QGeoRouteSegment & lhs , const QGeoRouteSegment & rhs )

Returns whether the route segments lhs and rhs are not equal.

值 nextRouteSegment () is not considered in the comparison.

[noexcept] bool operator== (const QGeoRouteSegment & lhs , const QGeoRouteSegment & rhs )

Returns whether the route segments lhs and rhs 相等。

值 nextRouteSegment () is not considered in the comparison.

内容

• 特性

• 公共函数

• 相关非成员

• 详细描述