QGCMapWidget.cc 29.6 KB
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#include "QGCMapWidget.h"
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#include "QGCMapToolBar.h"
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#include "UASInterface.h"
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#include "UASManager.h"
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#include "MAV2DIcon.h"
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#include "Waypoint2DIcon.h"
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#include "UASWaypointManager.h"
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#include "ArduPilotMegaMAV.h"
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QGCMapWidget::QGCMapWidget(QWidget *parent) :
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    mapcontrol::OPMapWidget(parent),
    firingWaypointChange(NULL),
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    maxUpdateInterval(2.1f), // 2 seconds
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    followUAVEnabled(false),
    trailType(mapcontrol::UAVTrailType::ByTimeElapsed),
    trailInterval(2.0f),
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    followUAVID(0),
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    mapInitialized(false),
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    homeAltitude(0),
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    uas(NULL)
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{
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    currWPManager = UASManager::instance()->getActiveUASWaypointManager();
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    waypointLines.insert(0, new QGraphicsItemGroup(map));
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    connect(currWPManager, SIGNAL(waypointEditableListChanged(int)), this, SLOT(updateWaypointList(int)));
    connect(currWPManager, SIGNAL(waypointEditableChanged(int, Waypoint*)), this, SLOT(updateWaypoint(int,Waypoint*)));
    connect(this, SIGNAL(waypointCreated(Waypoint*)), currWPManager, SLOT(addWaypointEditable(Waypoint*)));
    connect(this, SIGNAL(waypointChanged(Waypoint*)), currWPManager, SLOT(notifyOfChangeEditable(Waypoint*)));
    offlineMode = true;
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    // Widget is inactive until shown
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    defaultGuidedAlt = -1;
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    loadSettings(false);
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    this->setContextMenuPolicy(Qt::ActionsContextMenu);

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    QAction *guidedaction = new QAction(this);
    guidedaction->setText("Go To Here (Guided Mode)");
    connect(guidedaction,SIGNAL(triggered()),this,SLOT(guidedActionTriggered()));
    this->addAction(guidedaction);
    guidedaction = new QAction(this);
    guidedaction->setText("Go To Here Alt (Guided Mode)");
    connect(guidedaction,SIGNAL(triggered()),this,SLOT(guidedAltActionTriggered()));
    this->addAction(guidedaction);
    QAction *cameraaction = new QAction(this);
    cameraaction->setText("Point Camera Here");
    connect(cameraaction,SIGNAL(triggered()),this,SLOT(cameraActionTriggered()));
    this->addAction(cameraaction);
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}
void QGCMapWidget::guidedActionTriggered()
{
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    if (!uas)
    {
        QMessageBox::information(0,"Error","Please connect first");
        return;
    }
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    if (currWPManager)
    {
        if (defaultGuidedAlt == -1)
        {
            if (!guidedAltActionTriggered())
            {
                return;
            }
        }
        // Create new waypoint and send it to the WPManager to send out.
        internals::PointLatLng pos = map->FromLocalToLatLng(mousePressPos.x(), mousePressPos.y());
        qDebug() << "Guided action requested. Lat:" << pos.Lat() << "Lon:" << pos.Lng();
        Waypoint wp;
        wp.setLatitude(pos.Lat());
        wp.setLongitude(pos.Lng());
        wp.setAltitude(defaultGuidedAlt);
        currWPManager->goToWaypoint(&wp);
    }
}
bool QGCMapWidget::guidedAltActionTriggered()
{
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    if (!uas)
    {
        QMessageBox::information(0,"Error","Please connect first");
        return false;
    }
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    bool ok = false;
    int tmpalt = QInputDialog::getInt(this,"Altitude","Enter default altitude (in meters) of destination point for guided mode",100,0,30000,1,&ok);
    if (!ok)
    {
        //Use has chosen cancel. Do not send the waypoint
        return false;
    }
    defaultGuidedAlt = tmpalt;
    guidedActionTriggered();
    return true;
}
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void QGCMapWidget::cameraActionTriggered()
{
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    if (!uas)
    {
        QMessageBox::information(0,"Error","Please connect first");
        return;
    }
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    ArduPilotMegaMAV *newmav = qobject_cast<ArduPilotMegaMAV*>(this->uas);
    if (newmav)
    {
        newmav->setMountConfigure(4,true,true,true);
        internals::PointLatLng pos = map->FromLocalToLatLng(mousePressPos.x(), mousePressPos.y());
        newmav->setMountControl(pos.Lat(),pos.Lng(),100,true);
    }
}
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void QGCMapWidget::mousePressEvent(QMouseEvent *event)
{
    mapcontrol::OPMapWidget::mousePressEvent(event);
}

void QGCMapWidget::mouseReleaseEvent(QMouseEvent *event)
{
    mousePressPos = event->pos();
    mapcontrol::OPMapWidget::mouseReleaseEvent(event);
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}

QGCMapWidget::~QGCMapWidget()
{
    SetShowHome(false);	// doing this appears to stop the map lib crashing on exit
    SetShowUAV(false);	//   "          "
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    storeSettings();
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}

void QGCMapWidget::showEvent(QShowEvent* event)
{
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    // Disable OP's standard UAV, we have more than one
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    SetShowUAV(false);

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    // Pass on to parent widget
    OPMapWidget::showEvent(event);

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    connect(UASManager::instance(), SIGNAL(UASCreated(UASInterface*)), this, SLOT(addUAS(UASInterface*)), Qt::UniqueConnection);
    connect(UASManager::instance(), SIGNAL(activeUASSet(UASInterface*)), this, SLOT(activeUASSet(UASInterface*)), Qt::UniqueConnection);
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    connect(UASManager::instance(), SIGNAL(homePositionChanged(double,double,double)), this, SLOT(updateHomePosition(double,double,double)));

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    foreach (UASInterface* uas, UASManager::instance()->getUASList())
    {
        addUAS(uas);
    }
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    if (!mapInitialized)
    {
        internals::PointLatLng pos_lat_lon = internals::PointLatLng(0, 0);
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        SetMouseWheelZoomType(internals::MouseWheelZoomType::MousePositionWithoutCenter);	    // set how the mouse wheel zoom functions
        SetFollowMouse(true);				    // we want a contiuous mouse position reading
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        SetShowHome(true);					    // display the HOME position on the map
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        Home->SetSafeArea(0);                         // set radius (meters)
        Home->SetShowSafeArea(false);                                         // show the safe area
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        Home->SetCoord(pos_lat_lon);             // set the HOME position
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        setFrameStyle(QFrame::NoFrame);      // no border frame
        setBackgroundBrush(QBrush(Qt::black)); // tile background
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        // Set current home position
        updateHomePosition(UASManager::instance()->getHomeLatitude(), UASManager::instance()->getHomeLongitude(), UASManager::instance()->getHomeAltitude());
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        // Set currently selected system
        activeUASSet(UASManager::instance()->getActiveUAS());
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        // Connect map updates to the adapter slots
        connect(this, SIGNAL(WPValuesChanged(WayPointItem*)), this, SLOT(handleMapWaypointEdit(WayPointItem*)));
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        SetCurrentPosition(pos_lat_lon);         // set the map position
        setFocus();
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        // Start timer
        connect(&updateTimer, SIGNAL(timeout()), this, SLOT(updateGlobalPosition()));
        mapInitialized = true;
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        //QTimer::singleShot(800, this, SLOT(loadSettings()));
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    }
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    updateTimer.start(maxUpdateInterval*1000);
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    // Update all UAV positions
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    updateGlobalPosition();
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}

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void QGCMapWidget::hideEvent(QHideEvent* event)
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{
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    updateTimer.stop();
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    storeSettings();
    OPMapWidget::hideEvent(event);
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}
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/**
 * @param changePosition Load also the last position from settings and update the map position.
 */
void QGCMapWidget::loadSettings(bool changePosition)
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{
    // Atlantic Ocean near Africa, coordinate origin
    double lastZoom = 1;
    double lastLat = 0;
    double lastLon = 0;

    QSettings settings;
    settings.beginGroup("QGC_MAPWIDGET");
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    if (changePosition)
    {
        lastLat = settings.value("LAST_LATITUDE", lastLat).toDouble();
        lastLon = settings.value("LAST_LONGITUDE", lastLon).toDouble();
        lastZoom = settings.value("LAST_ZOOM", lastZoom).toDouble();
    }
    trailType = static_cast<mapcontrol::UAVTrailType::Types>(settings.value("TRAIL_TYPE", trailType).toInt());
    trailInterval = settings.value("TRAIL_INTERVAL", trailInterval).toFloat();
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    settings.endGroup();

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    // SET CORRECT MENU CHECKBOXES
    // Set the correct trail interval
    if (trailType == mapcontrol::UAVTrailType::ByDistance)
    {
        // XXX
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#ifdef Q_OS_WIN
#pragma message ("WARNING: Settings loading for trail type not implemented")
#else
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#warning Settings loading for trail type not implemented
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#endif
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    }
    else if (trailType == mapcontrol::UAVTrailType::ByTimeElapsed)
    {
        // XXX
    }

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    // SET TRAIL TYPE
    foreach (mapcontrol::UAVItem* uav, GetUAVS())
    {
        // Set the correct trail type
        uav->SetTrailType(trailType);
        // Set the correct trail interval
        if (trailType == mapcontrol::UAVTrailType::ByDistance)
        {
            uav->SetTrailDistance(trailInterval);
        }
        else if (trailType == mapcontrol::UAVTrailType::ByTimeElapsed)
        {
            uav->SetTrailTime(trailInterval);
        }
    }

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    // SET INITIAL POSITION AND ZOOM
    internals::PointLatLng pos_lat_lon = internals::PointLatLng(lastLat, lastLon);
    SetCurrentPosition(pos_lat_lon);        // set the map position
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    SetZoom(lastZoom); // set map zoom level
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}

void QGCMapWidget::storeSettings()
{
    QSettings settings;
    settings.beginGroup("QGC_MAPWIDGET");
    internals::PointLatLng pos = CurrentPosition();
    settings.setValue("LAST_LATITUDE", pos.Lat());
    settings.setValue("LAST_LONGITUDE", pos.Lng());
    settings.setValue("LAST_ZOOM", ZoomReal());
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    settings.setValue("TRAIL_TYPE", static_cast<int>(trailType));
    settings.setValue("TRAIL_INTERVAL", trailInterval);
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    settings.endGroup();
    settings.sync();
}

void QGCMapWidget::mouseDoubleClickEvent(QMouseEvent* event)
{
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    // If a waypoint manager is available
    if (currWPManager)
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    {
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        // Create new waypoint
        internals::PointLatLng pos = map->FromLocalToLatLng(event->pos().x(), event->pos().y());
        Waypoint* wp = currWPManager->createWaypoint();
        //            wp->blockSignals(true);
        //            wp->setFrame(MAV_FRAME_GLOBAL_RELATIVE_ALT);
        wp->setLatitude(pos.Lat());
        wp->setLongitude(pos.Lng());
        wp->setFrame((MAV_FRAME)currWPManager->getFrameRecommendation());
        wp->setAltitude(currWPManager->getAltitudeRecommendation());
        //            wp->blockSignals(false);
        //            currWPManager->notifyOfChangeEditable(wp);
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    }
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    OPMapWidget::mouseDoubleClickEvent(event);
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}


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/**
 *
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 * @param uas the UAS/MAV to monitor/display with the map widget
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 */
void QGCMapWidget::addUAS(UASInterface* uas)
{
    connect(uas, SIGNAL(globalPositionChanged(UASInterface*,double,double,double,quint64)), this, SLOT(updateGlobalPosition(UASInterface*,double,double,double,quint64)));
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    connect(uas, SIGNAL(systemSpecsChanged(int)), this, SLOT(updateSystemSpecs(int)));
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    if (!waypointLines.value(uas->getUASID(), NULL)) {
        waypointLines.insert(uas->getUASID(), new QGraphicsItemGroup(map));
    } else {
        foreach (QGraphicsItem* item, waypointLines.value(uas->getUASID())->childItems())
        {
            delete item;
        }
    }
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}

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void QGCMapWidget::activeUASSet(UASInterface* uas)
{
    // Only execute if proper UAS is set
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    this->uas = uas;
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    // Disconnect old MAV manager
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    if (currWPManager)
    {
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        // Disconnect the waypoint manager / data storage from the UI
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        disconnect(currWPManager, SIGNAL(waypointEditableListChanged(int)), this, SLOT(updateWaypointList(int)));
        disconnect(currWPManager, SIGNAL(waypointEditableChanged(int, Waypoint*)), this, SLOT(updateWaypoint(int,Waypoint*)));
        disconnect(this, SIGNAL(waypointCreated(Waypoint*)), currWPManager, SLOT(addWaypointEditable(Waypoint*)));
        disconnect(this, SIGNAL(waypointChanged(Waypoint*)), currWPManager, SLOT(notifyOfChangeEditable(Waypoint*)));
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    }

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    // Attach the new waypoint manager if a new UAS was selected. Otherwise, indicate
    // that no such manager exists.
    if (uas)
    {
        currWPManager = uas->getWaypointManager();
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        updateSelectedSystem(uas->getUASID());
        followUAVID = uas->getUASID();
        updateWaypointList(uas->getUASID());
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        // Connect the waypoint manager / data storage to the UI
        connect(currWPManager, SIGNAL(waypointEditableListChanged(int)), this, SLOT(updateWaypointList(int)));
        connect(currWPManager, SIGNAL(waypointEditableChanged(int, Waypoint*)), this, SLOT(updateWaypoint(int,Waypoint*)));
        connect(this, SIGNAL(waypointCreated(Waypoint*)), currWPManager, SLOT(addWaypointEditable(Waypoint*)));
        connect(this, SIGNAL(waypointChanged(Waypoint*)), currWPManager, SLOT(notifyOfChangeEditable(Waypoint*)));
    }
    else
    {
        currWPManager = NULL;
    }
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}

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/**
 * Updates the global position of one MAV and append the last movement to the trail
 *
 * @param uas The unmanned air system
 * @param lat Latitude in WGS84 ellipsoid
 * @param lon Longitutde in WGS84 ellipsoid
 * @param alt Altitude over mean sea level
 * @param usec Timestamp of the position message in milliseconds FIXME will move to microseconds
 */
void QGCMapWidget::updateGlobalPosition(UASInterface* uas, double lat, double lon, double alt, quint64 usec)
{
    Q_UNUSED(usec);

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    // Immediate update
    if (maxUpdateInterval == 0)
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    {
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        // Get reference to graphic UAV item
        mapcontrol::UAVItem* uav = GetUAV(uas->getUASID());
        // Check if reference is valid, else create a new one
        if (uav == NULL)
        {
            MAV2DIcon* newUAV = new MAV2DIcon(map, this, uas);
            newUAV->setParentItem(map);
            UAVS.insert(uas->getUASID(), newUAV);
            uav = GetUAV(uas->getUASID());
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            // Set the correct trail type
            uav->SetTrailType(trailType);
            // Set the correct trail interval
            if (trailType == mapcontrol::UAVTrailType::ByDistance)
            {
                uav->SetTrailDistance(trailInterval);
            }
            else if (trailType == mapcontrol::UAVTrailType::ByTimeElapsed)
            {
                uav->SetTrailTime(trailInterval);
            }
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        }

        // Set new lat/lon position of UAV icon
        internals::PointLatLng pos_lat_lon = internals::PointLatLng(lat, lon);
        uav->SetUAVPos(pos_lat_lon, alt);
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        // Follow status
        if (followUAVEnabled && uas->getUASID() == followUAVID) SetCurrentPosition(pos_lat_lon);
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        // Convert from radians to degrees and apply
        uav->SetUAVHeading((uas->getYaw()/M_PI)*180.0f);
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    }
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}
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/**
 * Pulls in the positions of all UAVs from the UAS manager
 */
void QGCMapWidget::updateGlobalPosition()
{
    QList<UASInterface*> systems = UASManager::instance()->getUASList();
    foreach (UASInterface* system, systems)
    {
        // Get reference to graphic UAV item
        mapcontrol::UAVItem* uav = GetUAV(system->getUASID());
        // Check if reference is valid, else create a new one
        if (uav == NULL)
        {
            MAV2DIcon* newUAV = new MAV2DIcon(map, this, system);
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            AddUAV(system->getUASID(), newUAV);
            uav = newUAV;
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            uav->SetTrailTime(1);
            uav->SetTrailDistance(5);
            uav->SetTrailType(mapcontrol::UAVTrailType::ByTimeElapsed);
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        }

        // Set new lat/lon position of UAV icon
        internals::PointLatLng pos_lat_lon = internals::PointLatLng(system->getLatitude(), system->getLongitude());
        uav->SetUAVPos(pos_lat_lon, system->getAltitude());
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        // Follow status
        if (followUAVEnabled && system->getUASID() == followUAVID) SetCurrentPosition(pos_lat_lon);
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        // Convert from radians to degrees and apply
        uav->SetUAVHeading((system->getYaw()/M_PI)*180.0f);
    }
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}

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void QGCMapWidget::updateLocalPosition()
{
    QList<UASInterface*> systems = UASManager::instance()->getUASList();
    foreach (UASInterface* system, systems)
    {
        // Get reference to graphic UAV item
        mapcontrol::UAVItem* uav = GetUAV(system->getUASID());
        // Check if reference is valid, else create a new one
        if (uav == NULL)
        {
            MAV2DIcon* newUAV = new MAV2DIcon(map, this, system);
            AddUAV(system->getUASID(), newUAV);
            uav = newUAV;
            uav->SetTrailTime(1);
            uav->SetTrailDistance(5);
            uav->SetTrailType(mapcontrol::UAVTrailType::ByTimeElapsed);
        }

        // Set new lat/lon position of UAV icon
        internals::PointLatLng pos_lat_lon = internals::PointLatLng(system->getLatitude(), system->getLongitude());
        uav->SetUAVPos(pos_lat_lon, system->getAltitude());
        // Follow status
        if (followUAVEnabled && system->getUASID() == followUAVID) SetCurrentPosition(pos_lat_lon);
        // Convert from radians to degrees and apply
        uav->SetUAVHeading((system->getYaw()/M_PI)*180.0f);
    }
}

void QGCMapWidget::updateLocalPositionEstimates()
{
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    updateLocalPosition();
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}

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void QGCMapWidget::updateSystemSpecs(int uas)
{
    foreach (mapcontrol::UAVItem* p, UAVS.values())
    {
        MAV2DIcon* icon = dynamic_cast<MAV2DIcon*>(p);
        if (icon && icon->getUASId() == uas)
        {
            // Set new airframe
            icon->setAirframe(UASManager::instance()->getUASForId(uas)->getAirframe());
            icon->drawIcon();
        }
    }
}

/**
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 * Does not update the system type or configuration, only the selected status
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 */
void QGCMapWidget::updateSelectedSystem(int uas)
{
    foreach (mapcontrol::UAVItem* p, UAVS.values())
    {
        MAV2DIcon* icon = dynamic_cast<MAV2DIcon*>(p);
        if (icon)
        {
            // Set as selected if ids match
            icon->setSelectedUAS((icon->getUASId() == uas));
        }
    }
}


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// MAP NAVIGATION
void QGCMapWidget::showGoToDialog()
{
    bool ok;
    QString text = QInputDialog::getText(this, tr("Please enter coordinates"),
                                         tr("Coordinates (Lat,Lon):"), QLineEdit::Normal,
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                                         QString("%1,%2").arg(CurrentPosition().Lat(), 0, 'g', 6).arg(CurrentPosition().Lng(), 0, 'g', 6), &ok);
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    if (ok && !text.isEmpty())
    {
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        QStringList split = text.split(",");
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        if (split.length() == 2)
        {
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            bool convert;
            double latitude = split.first().toDouble(&convert);
            ok &= convert;
            double longitude = split.last().toDouble(&convert);
            ok &= convert;

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            if (ok)
            {
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                internals::PointLatLng pos_lat_lon = internals::PointLatLng(latitude, longitude);
                SetCurrentPosition(pos_lat_lon);        // set the map position
            }
        }
    }
}


void QGCMapWidget::updateHomePosition(double latitude, double longitude, double altitude)
{
    Home->SetCoord(internals::PointLatLng(latitude, longitude));
    Home->SetAltitude(altitude);
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    homeAltitude = altitude;
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    SetShowHome(true);                      // display the HOME position on the map
}

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void QGCMapWidget::goHome()
{
    SetCurrentPosition(Home->Coord());
}

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/**
 * Limits the update rate on the specified interval. Set to zero (0) to run at maximum
 * telemetry speed. Recommended rate is 2 s.
 */
void QGCMapWidget::setUpdateRateLimit(float seconds)
{
    maxUpdateInterval = seconds;
    updateTimer.start(maxUpdateInterval*1000);
}

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void QGCMapWidget::cacheVisibleRegion()
{
    internals::RectLatLng rect = map->SelectedArea();

    if (rect.IsEmpty())
    {
        QMessageBox msgBox(this);
        msgBox.setIcon(QMessageBox::Information);
        msgBox.setText("Cannot cache tiles for offline use");
        msgBox.setInformativeText("Please select an area first by holding down SHIFT or ALT and selecting the area with the left mouse button.");
        msgBox.setStandardButtons(QMessageBox::Ok);
        msgBox.setDefaultButton(QMessageBox::Ok);
        msgBox.exec();
    }
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    else
    {
        RipMap();
        // Set empty area = unselect area
        map->SetSelectedArea(internals::RectLatLng());
    }
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}

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// WAYPOINT MAP INTERACTION FUNCTIONS

void QGCMapWidget::handleMapWaypointEdit(mapcontrol::WayPointItem* waypoint)
{
    // Block circle updates
    Waypoint* wp = iconsToWaypoints.value(waypoint, NULL);
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    // Delete UI element if wp doesn't exist
    if (!wp)
        WPDelete(waypoint);

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    // Protect from vicious double update cycle
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    if (firingWaypointChange == wp) return;
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    // Not in cycle, block now from entering it
    firingWaypointChange = wp;
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    // // qDebug() << "UPDATING WP FROM MAP";
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    // Update WP values
    internals::PointLatLng pos = waypoint->Coord();
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    // Block waypoint signals
    wp->blockSignals(true);
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    wp->setLatitude(pos.Lat());
    wp->setLongitude(pos.Lng());
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    // XXX Magic values
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//    wp->setAltitude(homeAltitude + 50.0f);
//    wp->setAcceptanceRadius(10.0f);
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    wp->blockSignals(false);
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    internals::PointLatLng coord = waypoint->Coord();
    QString coord_str = " " + QString::number(coord.Lat(), 'f', 6) + "   " + QString::number(coord.Lng(), 'f', 6);
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    // // qDebug() << "MAP WP COORD (MAP):" << coord_str << __FILE__ << __LINE__;
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    QString wp_str = QString::number(wp->getLatitude(), 'f', 6) + "   " + QString::number(wp->getLongitude(), 'f', 6);
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    // // qDebug() << "MAP WP COORD (WP):" << wp_str << __FILE__ << __LINE__;
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    firingWaypointChange = NULL;
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    emit waypointChanged(wp);
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}
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// WAYPOINT UPDATE FUNCTIONS
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/**
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 * This function is called if a a single waypoint is updated and
 * also if the whole list changes.
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 */
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void QGCMapWidget::updateWaypoint(int uas, Waypoint* wp)
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{
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    qDebug() << __FILE__ << __LINE__ << "UPDATING WP FUNCTION CALLED";
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    // Source of the event was in this widget, do nothing
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    if (firingWaypointChange == wp) {
        return;
    }
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    // Currently only accept waypoint updates from the UAS in focus
    // this has to be changed to accept read-only updates from other systems as well.
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    UASInterface* uasInstance = UASManager::instance()->getUASForId(uas);
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    if (currWPManager)
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    {
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        // Only accept waypoints in global coordinate frame
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        if (((wp->getFrame() == MAV_FRAME_GLOBAL) || (wp->getFrame() == MAV_FRAME_GLOBAL_RELATIVE_ALT)) && wp->isNavigationType())
        {
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            // We're good, this is a global waypoint

            // Get the index of this waypoint
            // note the call to getGlobalFrameAndNavTypeIndexOf()
            // as we're only handling global waypoints
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            int wpindex = currWPManager->getGlobalFrameAndNavTypeIndexOf(wp);
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            // If not found, return (this should never happen, but helps safety)
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            if (wpindex < 0) return;
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            // Mark this wp as currently edited
            firingWaypointChange = wp;

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            qDebug() << "UPDATING WAYPOINT" << wpindex << "IN 2D MAP";

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            // Check if wp exists yet in map
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            if (!waypointsToIcons.contains(wp))
            {
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                // Create icon for new WP
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                QColor wpColor(Qt::red);
                if (uasInstance) wpColor = uasInstance->getColor();
                Waypoint2DIcon* icon = new Waypoint2DIcon(map, this, wp, wpColor, wpindex);
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                ConnectWP(icon);
                icon->setParentItem(map);
                // Update maps to allow inverse data association
                waypointsToIcons.insert(wp, icon);
                iconsToWaypoints.insert(icon, wp);

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                // Add line element if this is NOT the first waypoint
                if (wpindex > 0)
                {
                    // Get predecessor of this WP
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                    QList<Waypoint* > wps = currWPManager->getGlobalFrameAndNavTypeWaypointList();
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                    Waypoint* wp1 = wps.at(wpindex-1);
                    mapcontrol::WayPointItem* prevIcon = waypointsToIcons.value(wp1, NULL);
                    // If we got a valid graphics item, continue
                    if (prevIcon)
                    {
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                        mapcontrol::WaypointLineItem* line = new mapcontrol::WaypointLineItem(prevIcon, icon, wpColor, map);
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                        line->setParentItem(map);
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                        QGraphicsItemGroup* group = waypointLines.value(uas, NULL);
                        if (group)
                        {
                            group->addToGroup(line);
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                            group->setParentItem(map);
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                        }
                    }
                }
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            }
            else
            {
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                // Waypoint exists, block it's signals and update it
                mapcontrol::WayPointItem* icon = waypointsToIcons.value(wp);
                // Make sure we don't die on a null pointer
                // this should never happen, just a precaution
                if (!icon) return;
                // Block outgoing signals to prevent an infinite signal loop
                // should not happen, just a precaution
                this->blockSignals(true);
                // Update the WP
                Waypoint2DIcon* wpicon = dynamic_cast<Waypoint2DIcon*>(icon);
                if (wpicon)
                {
                    // Let icon read out values directly from waypoint
                    icon->SetNumber(wpindex);
                    wpicon->updateWaypoint();
                }
                else
                {
                    // Use safe standard interfaces for non Waypoint-class based wps
                    icon->SetCoord(internals::PointLatLng(wp->getLatitude(), wp->getLongitude()));
                    icon->SetAltitude(wp->getAltitude());
                    icon->SetHeading(wp->getYaw());
                    icon->SetNumber(wpindex);
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                }
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                // Re-enable signals again
                this->blockSignals(false);
            }
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            firingWaypointChange = NULL;
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        }
        else
        {
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            // Check if the index of this waypoint is larger than the global
            // waypoint list. This implies that the coordinate frame of this
            // waypoint was changed and the list containing only global
            // waypoints was shortened. Thus update the whole list
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            if (waypointsToIcons.count() > currWPManager->getGlobalFrameAndNavTypeCount())
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            {
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                updateWaypointList(uas);
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            }
        }
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    }
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}

/**
 * Update the whole list of waypoints. This is e.g. necessary if the list order changed.
 * The UAS manager will emit the appropriate signal whenever updating the list
 * is necessary.
 */
void QGCMapWidget::updateWaypointList(int uas)
{
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    qDebug() << "UPDATE WP LIST IN 2D MAP CALLED FOR UAS" << uas;
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    // Currently only accept waypoint updates from the UAS in focus
    // this has to be changed to accept read-only updates from other systems as well.
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    UASInterface* uasInstance = UASManager::instance()->getUASForId(uas);
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    if (currWPManager)
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    {
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        // ORDER MATTERS HERE!
        // TWO LOOPS ARE NEEDED - INFINITY LOOP ELSE
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        qDebug() << "DELETING NOW OLD WPS";

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        // Delete connecting waypoint lines
        QGraphicsItemGroup* group = waypointLines.value(uas, NULL);
        if (group)
        {
            foreach (QGraphicsItem* item, group->childItems())
            {
                delete item;
            }
        }

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        // Delete first all old waypoints
        // this is suboptimal (quadratic, but wps should stay in the sub-100 range anyway)
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        QList<Waypoint* > wps = currWPManager->getGlobalFrameAndNavTypeWaypointList();
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        foreach (Waypoint* wp, waypointsToIcons.keys())
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        {
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            if (!wps.contains(wp))
            {
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                // Get icon to work on
                mapcontrol::WayPointItem* icon = waypointsToIcons.value(wp);
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                waypointsToIcons.remove(wp);
                iconsToWaypoints.remove(icon);
                WPDelete(icon);
            }
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        }

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        // Update all existing waypoints
        foreach (Waypoint* wp, waypointsToIcons.keys())
        {
            // Update remaining waypoints
            updateWaypoint(uas, wp);
        }
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        // Update all potentially new waypoints
        foreach (Waypoint* wp, wps)
        {
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            qDebug() << "UPDATING NEW WP" << wp->getId();
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            // Update / add only if new
            if (!waypointsToIcons.contains(wp)) updateWaypoint(uas, wp);
        }
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        // Add line element if this is NOT the first waypoint
        mapcontrol::WayPointItem* prevIcon = NULL;
        foreach (Waypoint* wp, wps)
        {
            mapcontrol::WayPointItem* currIcon = waypointsToIcons.value(wp, NULL);
            // Do not work on first waypoint, but only increment counter
            // do not continue if icon is invalid
            if (prevIcon && currIcon)
            {
                // If we got a valid graphics item, continue
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                QColor wpColor(Qt::red);
                if (uasInstance) wpColor = uasInstance->getColor();
                mapcontrol::WaypointLineItem* line = new mapcontrol::WaypointLineItem(prevIcon, currIcon, wpColor, map);
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                line->setParentItem(map);
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                QGraphicsItemGroup* group = waypointLines.value(uas, NULL);
                if (group)
                {
                    group->addToGroup(line);
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                    group->setParentItem(map);
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                }
            }
            prevIcon = currIcon;
        }
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    }
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}
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//// ADAPTER / HELPER FUNCTIONS
//float QGCMapWidget::metersToPixels(double meters)
//{
//    return meters/map->Projection()->GetGroundResolution(map->ZoomTotal(),coord.Lat());
//}

//double QGCMapWidget::headingP1P2(internals::PointLatLng p1, internals::PointLatLng p2)
//{
//    double lat1 = p1.Lat() * deg_to_rad;
//    double lon1 = p2.Lng() * deg_to_rad;

//    double lat2 = p2.Lat() * deg_to_rad;
//    double lon2 = p2.Lng() * deg_to_rad;

//    double delta_lon = lon2 - lon1;

//    double y = sin(delta_lon) * cos(lat2);
//    double x = cos(lat1) * sin(lat2) - sin(lat1) * cos(lat2) * cos(delta_lon);
//    double heading = atan2(y, x) * rad_to_deg;

//    heading += 360;
//    while (heading < 0) bear += 360;
//    while (heading >= 360) bear -= 360;

//    return heading;
//}

//internals::PointLatLng QGCMapWidget::targetLatLon(internals::PointLatLng source, double heading, double dist)
//{
//    double lat1 = source.Lat() * deg_to_rad;
//    double lon1 = source.Lng() * deg_to_rad;

//    heading *= deg_to_rad;

//    double ad = dist / earth_mean_radius;

//    double lat2 = asin(sin(lat1) * cos(ad) + cos(lat1) * sin(ad) * cos(heading));
//    double lon2 = lon1 + atan2(sin(bear) * sin(ad) * cos(lat1), cos(ad) - sin(lat1) * sin(lat2));

//    return internals::PointLatLng(lat2 * rad_to_deg, lon2 * rad_to_deg);
//}