qt-everywhere-src-5.14.1/qtlocation/src/location/declarativemaps/qdeclarativegeoroutesegment.cpp

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#include "qdeclarativegeoroutesegment_p.h"

#include <QtQml/QQmlEngine>
#include <QtQml/private/qqmlengine_p.h>
#include <QtQml/private/qv4scopedvalue_p.h>
#include <QtQml/private/qv4arrayobject_p.h>

QT_BEGIN_NAMESPACE

/*!
    \qmltype RouteSegment
    \instantiates QDeclarativeGeoRouteSegment
    \inqmlmodule QtLocation
    \ingroup qml-QtLocation5-routing
    \since QtLocation 5.5

    \brief The RouteSegment type represents a segment of a Route.

    A RouteSegment 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 optional RouteManeuvers associated with
    the end of the route segment.

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

    The primary means of acquiring Route objects is via Routes via \l RouteModel.

    \section1 Example

    The following QML snippet demonstrates how to print information about a
    route segment:

    \snippet declarative/routing.qml QtQuick import
    \snippet declarative/maps.qml QtLocation import
    \codeline
    \snippet declarative/routing.qml RouteSegment
*/

QDeclarativeGeoRouteSegment::QDeclarativeGeoRouteSegment(QObject *parent)
    : QObject(parent)
{
    maneuver_ = new QDeclarativeGeoManeuver(this);
}

QDeclarativeGeoRouteSegment::QDeclarativeGeoRouteSegment(const QGeoRouteSegment &segment,
                                                         QObject *parent)
    : QObject(parent),
      segment_(segment)
{
    maneuver_ = new QDeclarativeGeoManeuver(segment_.maneuver(), this);
}

QDeclarativeGeoRouteSegment::~QDeclarativeGeoRouteSegment() {}

/*!
    \qmlproperty int QtLocation::RouteSegment::travelTime

    Read-only property which holds the estimated amount of time it will take to
    traverse this segment, in seconds.

*/

int QDeclarativeGeoRouteSegment::travelTime() const
{
    return segment_.travelTime();
}

/*!
    \qmlproperty real QtLocation::RouteSegment::distance

    Read-only property which holds the distance covered by this segment of the route, in meters.

*/

qreal QDeclarativeGeoRouteSegment::distance() const
{
    return segment_.distance();
}

/*!
    \qmlproperty RouteManeuver QtLocation::RouteSegment::maneuver

    Read-only property which holds the maneuver for this route segment.

    Will return invalid maneuver if no information has been attached to the endpoint
    of this route segment.
*/

QDeclarativeGeoManeuver *QDeclarativeGeoRouteSegment::maneuver() const
{
    return maneuver_;
}

/*!
    \qmlproperty list<coordinate> QtLocation::RouteSegment::path

    Read-only property which holds the geographical coordinates of this segment.
    Coordinates are listed in the order in which they would be traversed by someone
    traveling along this segment of the route.

    To access individual segments you can use standard list accessors: 'path.length'
    indicates the number of objects and 'path[index starting from zero]' gives
    the actual object.

    \sa QtPositioning::coordinate
*/

QJSValue QDeclarativeGeoRouteSegment::path() const
{
    QQmlContext *context = QQmlEngine::contextForObject(parent());
    QQmlEngine *engine = context->engine();
    QV4::ExecutionEngine *v4 = QQmlEnginePrivate::getV4Engine(engine);

    QV4::Scope scope(v4);
    QV4::Scoped<QV4::ArrayObject> pathArray(scope, v4->newArrayObject(segment_.path().length()));
    for (int i = 0; i < segment_.path().length(); ++i) {
        const QGeoCoordinate &c = segment_.path().at(i);

        QV4::ScopedValue cv(scope, v4->fromVariant(QVariant::fromValue(c)));
        pathArray->put(i, cv);
    }

    return QJSValue(v4, pathArray.asReturnedValue());
}

QT_END_NAMESPACE