C++ GeoDataLineString::at方法代码示例

bool PolylineAnnotation::processAddingNodesOnPress( QMouseEvent *mouseEvent )
{
    if ( mouseEvent->button() != Qt::LeftButton ) {
        return false;
    }

    GeoDataLineString *line = static_cast<GeoDataLineString*>( placemark()->geometry() );

    // If a virtual node has just been clicked, add it to the polyline and start 'adjusting'
    // its position.
    const int virtualIndex = virtualNodeContains( mouseEvent->pos() );
    if ( virtualIndex != -1 && m_adjustedNode == -1 ) {
        Q_ASSERT( m_virtualHoveredNode == virtualIndex );

        line->insert( virtualIndex + 1, line->at( virtualIndex ).interpolate( line->at( virtualIndex + 1 ), 0.5 ) );
        m_nodesList.insert( virtualIndex + 1, PolylineNode() );

        m_adjustedNode = virtualIndex + 1;
        m_virtualHoveredNode = -1;
        return true;
    }

    // If a virtual node which has been previously clicked and selected to become a
    // 'real node' is clicked one more time, it stops from being 'adjusted'.
    const int realIndex = nodeContains( mouseEvent->pos() );
    if ( realIndex != -1 && m_adjustedNode != -1 ) {
        m_adjustedNode = -1;
        return true;
    }

    return false;
}

void PolylineAnnotation::updateRegions( GeoPainter *painter )
{
    if ( m_busy ) {
        return;
    }

    const GeoDataLineString line = static_cast<const GeoDataLineString>( *placemark()->geometry() );

    if ( state() == SceneGraphicsItem::AddingNodes ) {
        // Create and update virtual nodes lists when being in the AddingPolgonNodes state, to
        // avoid overhead in other states.
        m_virtualNodesList.clear();
        for ( int i = 0; i < line.size() - 1; ++i ) {
            const QRegion newRegion( painter->regionFromEllipse( line.at(i).interpolate( line.at(i+1), 0.5 ),
                                                                 hoveredDim, hoveredDim ) );
            m_virtualNodesList.append( PolylineNode( newRegion ) );
        }
    }


    // Update the polyline region;
    m_polylineRegion = painter->regionFromPolyline( line, 15 );

    // Update the node lists.
    for ( int i = 0; i < m_nodesList.size(); ++i ) {
        const QRegion newRegion = m_nodesList.at(i).isSelected() ?
                                  painter->regionFromEllipse( line.at(i), selectedDim, selectedDim ) :
                                  painter->regionFromEllipse( line.at(i), regularDim, regularDim );
        m_nodesList[i].setRegion( newRegion );
    }
}

bool PolylineAnnotation::processAddingNodesOnMove( QMouseEvent *mouseEvent )
{
    Q_ASSERT( mouseEvent->button() == Qt::NoButton );

    const int index = virtualNodeContains( mouseEvent->pos() );

    // If we are adjusting a virtual node which has just been clicked and became real, just
    // change its coordinates when moving it, as we do with nodes in Editing state on move.
    if ( m_adjustedNode != -1 ) {
        // The virtual node which has just been added is always the last within
        // GeoDataLinearRing's container.qreal lon, lat;
        qreal lon, lat;
        m_viewport->geoCoordinates( mouseEvent->pos().x(),
                                    mouseEvent->pos().y(),
                                    lon, lat,
                                    GeoDataCoordinates::Radian );
        const GeoDataCoordinates newCoords( lon, lat );
        GeoDataLineString *line = static_cast<GeoDataLineString*>( placemark()->geometry() );
        line->at(m_adjustedNode) = newCoords;

        return true;

    // If we are hovering a virtual node, store its index in order to be painted in drawNodes
    // method.
    } else if ( index != -1 ) {
        m_virtualHoveredNode = index;
        return true;
    }

    return false;
}

bool PolylineAnnotation::processEditingOnMove( QMouseEvent *mouseEvent )
{
    if ( !m_viewport ) {
        return false;
    }

    qreal lon, lat;
    m_viewport->geoCoordinates( mouseEvent->pos().x(),
                                mouseEvent->pos().y(),
                                lon, lat,
                                GeoDataCoordinates::Radian );
    const GeoDataCoordinates newCoords( lon, lat );

    if ( m_interactingObj == InteractingNode ) {
        GeoDataLineString *line = static_cast<GeoDataLineString*>( placemark()->geometry() );
        line->at(m_clickedNodeIndex) = newCoords;

        return true;
    } else if ( m_interactingObj == InteractingPolyline ) {
        GeoDataLineString *lineString = static_cast<GeoDataLineString*>( placemark()->geometry() );
        const GeoDataLineString oldLineString = *lineString;
        lineString->clear();

        const qreal deltaLat = lat - m_movedPointCoords.latitude();
        const qreal deltaLon = lon - m_movedPointCoords.longitude();

        Quaternion latRectAxis = Quaternion::fromEuler( 0, lon, 0);
        Quaternion latAxis = Quaternion::fromEuler( -deltaLat, 0, 0);
        Quaternion lonAxis = Quaternion::fromEuler(0, deltaLon, 0);
        Quaternion rotAxis = latRectAxis * latAxis * latRectAxis.inverse() * lonAxis;

        qreal lonRotated, latRotated;
        for ( int i = 0; i < oldLineString.size(); ++i ) {
            Quaternion qpos = oldLineString.at(i).quaternion();
            qpos.rotateAroundAxis(rotAxis);
            qpos.getSpherical( lonRotated, latRotated );
            GeoDataCoordinates movedPoint( lonRotated, latRotated, 0 );

            lineString->append( movedPoint );
        }

        m_movedPointCoords = newCoords;
        return true;
    }

    return dealWithHovering( mouseEvent );
}

void EditPolylineDialog::handleItemMoving( GeoDataPlacemark *item )
{
    if( item == d->m_placemark ) {
        d->m_nodeModel->clear();
        if( d->m_placemark->geometry()->nodeType() == GeoDataTypes::GeoDataLineStringType ) {
            GeoDataLineString *lineString = static_cast<GeoDataLineString*>( d->m_placemark->geometry() );
            for( int i = 0; i < lineString->size(); ++i ) {
                d->m_nodeModel->addNode( lineString->at( i ) );
            }
        }
    }
}

void RoutingModelPrivate::importPlacemark( RouteSegment &outline, QVector<RouteSegment> &segments, const GeoDataPlacemark *placemark )
{
    GeoDataGeometry* geometry = placemark->geometry();
    GeoDataLineString* lineString = dynamic_cast<GeoDataLineString*>( geometry );
    QStringList blacklist = QStringList() << "" << "Route" << "Tessellated";
    RouteSegment segment;
    bool isOutline = true;
    if ( !blacklist.contains( placemark->name() ) ) {
        if( lineString ) {
            Maneuver maneuver;
            maneuver.setInstructionText( placemark->name() );
            maneuver.setPosition( lineString->at( 0 ) );

            if ( placemark->extendedData().contains( "turnType" ) ) {
                QVariant turnType = placemark->extendedData().value( "turnType" ).value();
                // The enum value is converted to/from an int in the QVariant
                // because only a limited set of data types can be serialized with QVariant's
                // toString() method (which is used to serialize <ExtendedData>/<Data> values)
                maneuver.setDirection( Maneuver::Direction( turnType.toInt() ) );
            }

            if ( placemark->extendedData().contains( "roadName" ) ) {
                QVariant roadName = placemark->extendedData().value( "roadName" ).value();
                maneuver.setRoadName( roadName.toString() );
            }

            segment.setManeuver( maneuver );
            isOutline = false;
        }
    }

    if ( lineString ) {
        segment.setPath( *lineString );

        if ( isOutline ) {
            outline = segment;
        } else {
            segments.push_back( segment );
        }
    }
}

void PolylineAnnotation::move( const GeoDataCoordinates &source, const GeoDataCoordinates &destination )
{
    GeoDataLineString *lineString = static_cast<GeoDataLineString*>( placemark()->geometry() );
    GeoDataLineString oldLineString = *lineString;
    lineString->clear();

    const qreal deltaLat = destination.latitude() - source.latitude();
    const qreal deltaLon = destination.longitude() - source.longitude();

    Quaternion latRectAxis = Quaternion::fromEuler( 0, destination.longitude(), 0);
    Quaternion latAxis = Quaternion::fromEuler( -deltaLat, 0, 0);
    Quaternion lonAxis = Quaternion::fromEuler(0, deltaLon, 0);
    Quaternion rotAxis = latRectAxis * latAxis * latRectAxis.inverse() * lonAxis;

    qreal lonRotated, latRotated;
    for ( int i = 0; i < oldLineString.size(); ++i ) {
        Quaternion qpos = oldLineString.at(i).quaternion();
        qpos.rotateAroundAxis(rotAxis);
        qpos.getSpherical( lonRotated, latRotated );
        GeoDataCoordinates movedPoint( lonRotated, latRotated, 0 );

        lineString->append( movedPoint );
    }
}

GeoDataDocument* MapQuestRunner::parse( const QByteArray &content ) const
{
    QDomDocument xml;
    if ( !xml.setContent( content ) ) {
        mDebug() << "Cannot parse xml file with routing instructions.";
        return 0;
    }

    // mDebug() << xml.toString(2);
    QDomElement root = xml.documentElement();

    GeoDataDocument* result = new GeoDataDocument();
    result->setName( "MapQuest" );
    GeoDataPlacemark* routePlacemark = new GeoDataPlacemark;
    routePlacemark->setName( "Route" );

    GeoDataLineString* routeWaypoints = new GeoDataLineString;
    QDomNodeList shapePoints = root.elementsByTagName( "shapePoints" );
    if ( shapePoints.size() == 1 ) {
        QDomNodeList geometry = shapePoints.at( 0 ).toElement().elementsByTagName( "latLng" );
        for ( int i=0; i<geometry.size(); ++i ) {
            double const lat = geometry.item( i ).namedItem( "lat" ).toElement().text().toDouble();
            double const lon = geometry.item( i ).namedItem( "lng" ).toElement().text().toDouble();
            GeoDataCoordinates const position( lon, lat, 0.0, GeoDataCoordinates::Degree );
            routeWaypoints->append( position );
        }
    }
    routePlacemark->setGeometry( routeWaypoints );

    QTime time;
    time = time.addSecs( root.elementsByTagName( "time" ).at( 0 ).toElement().text().toInt() );
    qreal length = routeWaypoints->length( EARTH_RADIUS );
    const QString name = nameString( "MQ", length, time );
    const GeoDataExtendedData data = routeData( length, time );
    routePlacemark->setExtendedData( data );
    result->setName( name );
    result->append( routePlacemark );

    QMap<int,int> mapping;
    QDomNodeList maneuvers = root.elementsByTagName( "maneuverIndexes" );
    if ( maneuvers.size() == 1 ) {
        maneuvers = maneuvers.at( 0 ).childNodes();
        for ( int i=0; i<maneuvers.size(); ++i ) {
            mapping[i] = maneuvers.at( i ).toElement().text().toInt();
            if ( mapping[i] == routeWaypoints->size() ) {
                --mapping[i];
            }
        }
    }

    QDomNodeList instructions = root.elementsByTagName( "maneuver" );
    unsigned int const lastInstruction = qMax<int>( 0, instructions.length()-1 ); // ignore the last 'Welcome to xy' instruction
    for ( unsigned int i = 0; i < lastInstruction; ++i ) {
        QDomElement node = instructions.item( i ).toElement();

        QDomNodeList maneuver = node.elementsByTagName( "turnType" );
        QDomNodeList textNodes = node.elementsByTagName( "narrative" );
        QDomNodeList points = node.elementsByTagName( "startPoint" );
        QDomNodeList streets = node.elementsByTagName( "streets" );

        Q_ASSERT( mapping.contains( i ) );
        if ( textNodes.size() == 1 && maneuver.size() == 1 && points.size() == 1 && mapping.contains( i ) ) {
            GeoDataPlacemark* instruction = new GeoDataPlacemark;
            instruction->setName( textNodes.at( 0 ).toElement().text() );

            GeoDataExtendedData extendedData;
            GeoDataData turnType;
            turnType.setName( "turnType" );
            turnType.setValue( maneuverType( maneuver.at( 0 ).toElement().text().toInt() ) );
            extendedData.addValue( turnType );
            if ( streets.size() == 1 ) {
                GeoDataData roadName;
                roadName.setName( "roadName" );
                roadName.setValue( streets.at( 0 ).toElement().text() );
                extendedData.addValue( roadName );
            }
            instruction->setExtendedData( extendedData );

            int const start = mapping[i];
            int const end = mapping.contains(i+1) ? mapping[i+1] : routeWaypoints->size()-1;
            if ( start >= 0 && start < routeWaypoints->size() && end < routeWaypoints->size() ) {
                instruction->setName( textNodes.item( 0 ).toElement().text() );
                GeoDataLineString *lineString = new GeoDataLineString;
                for ( int j=start; j<=end; ++j ) {
                    *lineString << GeoDataCoordinates( routeWaypoints->at( j ).longitude(), routeWaypoints->at( j ).latitude() );
                }

                if ( !lineString->isEmpty() ) {
                    instruction->setGeometry( lineString );
                    result->append( instruction );
                }
            }
        }
    }

    if ( routeWaypoints->size() < 1 ) {
        delete result;
        result = 0;
    }

//.........这里部分代码省略.........

void PolylineAnnotation::drawNodes( GeoPainter *painter )
{
    // These are the 'real' dimensions of the drawn nodes. The ones which have class scope are used
    // to generate the regions and they are a little bit larger, because, for example, it would be
    // a little bit too hard to select nodes.
    static const int d_regularDim = 10;
    static const int d_selectedDim = 10;
    static const int d_mergedDim = 20;
    static const int d_hoveredDim = 20;

    const GeoDataLineString line = static_cast<const GeoDataLineString>( *placemark()->geometry() );

    QColor glowColor = QApplication::palette().highlightedText().color();
    glowColor.setAlpha(120);

    for ( int i = 0; i < line.size(); ++i ) {
        // The order here is important, because a merged node can be at the same time selected.
        if ( m_nodesList.at(i).isBeingMerged() ) {
            painter->setBrush( mergedColor );
            painter->drawEllipse( line.at(i), d_mergedDim, d_mergedDim );
        } else if ( m_nodesList.at(i).isSelected() ) {
            painter->setBrush( selectedColor );
            painter->drawEllipse( line.at(i), d_selectedDim, d_selectedDim );

            if ( m_nodesList.at(i).isEditingHighlighted() ||
                 m_nodesList.at(i).isMergingHighlighted() ) {
                QPen defaultPen = painter->pen();
                QPen newPen;
                newPen.setWidth( defaultPen.width() + 3 );
                newPen.setColor( glowColor );

                painter->setBrush( Qt::NoBrush );
                painter->setPen( newPen );
                painter->drawEllipse( line.at(i), d_selectedDim + 2, d_selectedDim + 2 );
                painter->setPen( defaultPen );
            }
        } else {
            painter->setBrush( regularColor );
            painter->drawEllipse( line.at(i), d_regularDim, d_regularDim );

            if ( m_nodesList.at(i).isEditingHighlighted() ||
                 m_nodesList.at(i).isMergingHighlighted() ) {
                QPen defaultPen = painter->pen();
                QPen newPen;
                newPen.setWidth( defaultPen.width() + 3 );
                newPen.setColor( glowColor );

                painter->setPen( newPen );
                painter->setBrush( Qt::NoBrush );
                painter->drawEllipse( line.at(i), d_regularDim + 2, d_regularDim + 2 );
                painter->setPen( defaultPen );
            }
        }
    }

    if ( m_virtualHoveredNode != -1 ) {
        painter->setBrush( hoveredColor );

        GeoDataCoordinates newCoords;
        if ( m_virtualHoveredNode + 1 ) {
            newCoords = line.at( m_virtualHoveredNode + 1 ).interpolate( line.at( m_virtualHoveredNode ), 0.5 );
        } else {
            newCoords = line.first().interpolate( line.last(), 0.5 );
        }
        painter->drawEllipse( newCoords, d_hoveredDim, d_hoveredDim );
    }
}