path: root/src/imports/location/qdeclarativegeomap.cpp

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#include "qdeclarativegeomap_p.h"
#include "qdeclarativegeomapmousearea_p.h"

#include "qdeclarativegeomapquickitem_p.h"
#include "qdeclarativecoordinate_p.h"
#include "qdeclarativegeoserviceprovider_p.h"
#include <QtCore/QCoreApplication>
#include <QtCore/qnumeric.h>
#include <QThread>

#include "qgeotilecache_p.h"
#include "qgeotile_p.h"
#include "qgeocameradata_p.h"
#include "qgeomapcontroller_p.h"
#include "mapnode_p.h"
#include <cmath>

#include <qgeoserviceprovider.h>
#include <qgeomappingmanager.h>

#include <QDeclarativeContext>
#include <QtDeclarative/qdeclarativeinfo.h>
#include <QModelIndex>
#include <QtQuick/QQuickCanvas>
#include <QtQuick/QSGEngine>
#include <QtGui/QGuiApplication>

QT_BEGIN_NAMESPACE

/*!
    \qmlclass Map QDeclarativeGeoMap
    \inqmlmodule QtLocation 5
    \ingroup qml-QtLocation5-maps
    \since QtLocation 5.0

    \brief The Map element displays a map.

    The Map element is used to display a map or image of the Earth, with
    the capability to also display interactive objects tied to the map's
    surface.

    There are a variety of different ways to visualise the Earth's surface
    in a 2-dimensional manner, but all of them involve some kind of projection:
    a mathematical relationship between the 3D coordinates (latitude, longitude
    and altitude) and 2D coordinates (X and Y in pixels) on the screen.

    Different sources of map data can use different projections, and from the
    point of view of the Map element, we treat these as one replaceable unit:
    the Map plugin. A Map plugin consists of a data source, as well as all other
    details needed to display its data on-screen.

    The current Map plugin in use is contained in the \l plugin property of
    the Map item. In order to display any image in a Map item, you will need
    to set this property. See the \l Plugin element for a description of how
    to retrieve an appropriate plugin for use.

    The geographic region displayed in the Map item is referred to as its
    viewport, and this is defined by the properties \l center, and
    \l zoomLevel. The \l center property contains a \l Coordinate specifying
    the center of the viewport, while \l zoomLevel controls the scale of the
    map. See each of these properties for further details about their values.

    When the map is displayed, each possible geographic Coordinate that is
    visible will map to some pixel X and Y coordinate on the screen. To perform
    conversions between these two, Map provides the \l toCoordinate and
    \l toScreenPosition functions, which are of general utility.

    \section2 Map Objects

    Map objects can be declared within the body of a Map element in QML and will
    automatically appear on the Map. To add objects programatically, first be
    sure they are created with the Map as their parent (eg. in an argument to
    Component::createObject), and then call the \l addMapItem method on the Map.
    A corresponding \l removeMapItem method also exists to do the opposite and
    remove an object from the Map.

    Moving Map objects around, resizing them or changing their shape normally
    does not involve any special interaction with Map itself -- changing these
    details about a map object will automatically update the display.

    \section2 Interaction

    The Map element includes support for pinch and flick gestures to control
    zooming and panning. These are disabled by default, but available at any
    time by using the \l flick and \l pinch objects. These properties themselves
    are read-only: the actual Flickable and PinchArea are constructed specially
    at startup and cannot be replaced or destroyed. Their properties can be
    altered, however, to control their behaviour.

    Mouse and touch interaction with Maps and map objects is slightly different
    to ordinary QML elements. In a Map or Map object, you will need to make use
    of the \l MapMouseArea element instead of the normal Qt Quick MouseArea.
    MapMouseArea is, in almost all respects, a drop-in replacement for
    MouseArea, but the documentation for that element should be referred to for
    further details.

    \section2 Performance

    Maps are rendered using OpenGL (ES) and the Qt Scene Graph stack, and as
    a result are quite performant where GL accelerated hardware is available.

    For "online" Map plugins, network bandwidth and latency can be major
    contributors to the user's perception of performance. Extensive caching is
    performed to mitigate this, but such mitigation is not always perfect. For
    "offline" plugins, the time spent retrieving the stored geographic data
    and rendering the basic map features can often play a dominant role. Some
    offline plugins may use hardware acceleration themselves to (partially)
    avert this.

    In general, large and complex Map items such as polygons and polylines with
    large numbers of vertices can have an adverse effect on UI performance.
    Further, more detailed notes on this are in the documentation for each
    map item element.

    \section2 Example Usage

    The following snippet shows a simple Map and the necessary Plugin element
    to use it. The map is centered near Brisbane, Australia, zoomed out to the
    minimum zoom level, with Flickable panning enabled.

    \code
    Plugin {
        id: somePlugin
        // code here to choose the plugin as necessary
    }

    Map {
        id: map

        plugin: somePlugin

        center: Coordinate { latitude: -27; longitude: 153 }
        zoomLevel: map.minimumZoomLevel

        flick.enabled: true
    }
    \endcode

    \image ../../../doc/src/images/api-map.png
*/

QDeclarativeGeoMap::QDeclarativeGeoMap(QQuickItem *parent)
        : QQuickItem(parent),
        plugin_(0),
        serviceProvider_(0),
        mappingManager_(0),
        zoomLevel_(8.0),
        bearing_(0.0),
        tilt_(0.0),
        center_(0),
        activeMapType_(0),
        componentCompleted_(false),
        mappingManagerInitialized_(false),
        flickable_(0),
        pinchArea_(0),
        canvas_(0),
        touchTimer_(-1),
        tileCache_(0)
{
    QLOC_TRACE0;
    setAcceptHoverEvents(false);
    setAcceptedMouseButtons(Qt::LeftButton | Qt::MidButton | Qt::RightButton);
    setFlags(QQuickItem::ItemHasContents | QQuickItem::ItemClipsChildrenToShape);

    // Create internal flickable and pinch area.
    tileCache_ = new QGeoTileCache();
    map_ = new QGeoMap(tileCache_, this);
    map_->setActiveMapType(QGeoMapType());
    flickable_ = new QDeclarativeGeoMapFlickable(this);
    flickable_->setMap(map_);
    pinchArea_ = new QDeclarativeGeoMapPinchArea(this, this);
}

QDeclarativeGeoMap::~QDeclarativeGeoMap()
{
    if (!mapViews_.isEmpty())
        qDeleteAll(mapViews_);
    // remove any map items associations
    for (int i = 0; i < mapItems_.count(); ++i)
        qobject_cast<QDeclarativeGeoMapItemBase*>(mapItems_.at(i))->setMap(0,0);
    mapItems_.clear();
}

void QDeclarativeGeoMap::pluginReady()
{
    serviceProvider_  = plugin_->sharedGeoServiceProvider();
    mappingManager_ = serviceProvider_->mappingManager();

    if (!mappingManager_  || serviceProvider_->error() != QGeoServiceProvider::NoError) {
           qmlInfo(this) << tr("Warning: Plugin does not support mapping.");
           return;
       }

    pinchArea_->zoomLevelLimits(mappingManager_->minimumZoomLevel(), mappingManager_->maximumZoomLevel());

    if (!mappingManager_->isInitialized())
        connect(mappingManager_, SIGNAL(initialized()), this, SLOT(mappingManagerInitialized()));
    else
        mappingManagerInitialized();

    // make sure this is only called once
    disconnect(this, SLOT(pluginReady()));
}

void QDeclarativeGeoMap::componentComplete()
{
    QLOC_TRACE0;

    componentCompleted_ = true;
    populateMap();
    QQuickItem::componentComplete();
}

void QDeclarativeGeoMap::mousePressEvent(QMouseEvent *event)
{
    if (!mouseEvent(event))
        event->ignore();
}

void QDeclarativeGeoMap::mouseMoveEvent(QMouseEvent *event)
{
    if (!mouseEvent(event))
        event->ignore();
}

void QDeclarativeGeoMap::mouseReleaseEvent(QMouseEvent *event)
{
    if (!mouseEvent(event))
        event->ignore();
}

// returns whether flickable used the event
bool QDeclarativeGeoMap::mouseEvent(QMouseEvent* event)
{
    if (!mappingManagerInitialized_)
        return false;
    switch (event->type()) {
    case QEvent::MouseButtonPress:
        return flickable_->mousePressEvent(event);
    case QEvent::MouseButtonRelease:
        return flickable_->mouseReleaseEvent(event);
    case QEvent::MouseMove:
        return flickable_->mouseMoveEvent(event);
    default:
        return false;
    }
}

/*!
    \qmlproperty MapPinchArea QtLocation5::Map::pinch
*/

QDeclarativeGeoMapPinchArea* QDeclarativeGeoMap::pinch()
{
    return pinchArea_;
}

/*!
    \qmlproperty MapFlickable QtLocation5::Map::flick

    Contains the MapFlickable created with the Map. Use \c{flick.enabled: true}
    to enable basic flick gestures, or see \l{MapFlickable} for further details.
*/

QDeclarativeGeoMapFlickable* QDeclarativeGeoMap::flick()
{
    return flickable_;
}

void QDeclarativeGeoMap::itemChange(ItemChange change, const ItemChangeData & data)
{
    QLOC_TRACE0;
    if (change == ItemSceneChange)
        canvas_ = data.canvas;
}

void QDeclarativeGeoMap::populateMap()
{
    QObjectList kids = children();
    for (int i = 0; i < kids.size(); ++i) {
        // dispatch items appropriately
        QDeclarativeGeoMapItemView* mapView = qobject_cast<QDeclarativeGeoMapItemView*>(kids.at(i));
        if (mapView) {
            mapViews_.append(mapView);
            setupMapView(mapView);
            continue;
        }
        QDeclarativeGeoMapItemBase* mapItem = qobject_cast<QDeclarativeGeoMapItemBase*>(kids.at(i));
        if (mapItem) {
            addMapItem(mapItem);
        }
    }
}

void QDeclarativeGeoMap::setupMapView(QDeclarativeGeoMapItemView *view)
{
    Q_UNUSED(view)
    view->setMapData(this);
    view->repopulate();
}

// Note: this keyboard handling is for development purposes only
void QDeclarativeGeoMap::keyPressEvent(QKeyEvent *e)
{
    if (!mappingManagerInitialized_)
        return;
    QLOC_TRACE2(" key: ", e->key());
    QGeoCameraData cameraData = map_->cameraData();
    if (e->key() == Qt::Key_Left) {
        if (e->modifiers() & Qt::ShiftModifier) {
            map_->mapController()->pan(-1.0 * map_->width() / 8.0, 0);
            cameraData = map_->cameraData();
        } else {
            cameraData.setBearing(cameraData.bearing() - 5.0);
        }
    } else if (e->key() == Qt::Key_Right) {
        if (e->modifiers() & Qt::ShiftModifier) {
            map_->mapController()->pan(map_->width() / 8.0, 0);
            cameraData = map_->cameraData();
        } else {
            cameraData.setBearing(cameraData.bearing() + 5.0);
        }
    } else if (e->key() == Qt::Key_Up) {
        if (e->modifiers() & Qt::ShiftModifier) {
            map_->mapController()->pan(0, map_->height() / 8.0);
            cameraData = map_->cameraData();
        } else {
            cameraData.setTilt(cameraData.tilt() - 5.0);
        }
    } else if (e->key() == Qt::Key_Down) {
        if (e->modifiers() & Qt::ShiftModifier) {
            map_->mapController()->pan(0, -1.0 * map_->height() / 8.0);
            cameraData = map_->cameraData();
        } else {
            cameraData.setTilt(cameraData.tilt() + 5.0);
        }
    } else if (e->key() == Qt::Key_Plus) {
        if (e->modifiers() & Qt::ShiftModifier) {
            cameraData.setDistance(cameraData.distance() / 2.0);
            cameraData.setZoomLevel(cameraData.zoomLevel() + 1);
            map_->setCameraData(cameraData);
        } else {
            cameraData.setDistance(cameraData.distance() / 1.1);
        }
    } else if (e->key() == Qt::Key_Minus) {
        if (e->modifiers() & Qt::ShiftModifier) {
            if (cameraData.zoomLevel() != 1)
                cameraData.setZoomLevel(cameraData.zoomLevel() - 1);
            cameraData.setDistance(cameraData.distance() * 2.0);
            map_->setCameraData(cameraData);
        } else {
            cameraData.setDistance(cameraData.distance() * 1.1);
        }
    } else if (e->key() == Qt::Key_U) {
        map_->setCameraData(cameraData);
    }
    map_->setCameraData(cameraData);
    update();
}

QSGNode* QDeclarativeGeoMap::updatePaintNode(QSGNode* oldNode, UpdatePaintNodeData* data)
{
    Q_UNUSED(data)
    if (width() <= 0 || height() <= 0) {
        delete oldNode;
        return 0;
    }

    MapNode *node = static_cast<MapNode *>(oldNode);

    if (!node) {
        node = new MapNode(map_);
    }

    node->setSize(QSize(width(), height()));
    node->update();

    return node;
}


/*!
    \qmlproperty Plugin QtLocation5::Map::plugin

    This property holds the plugin which provides the mapping functionality.

    This is write-once property.  Once the map has a plugin associated with
    it any attempted modifications of the plugin will be ignored.
*/

void QDeclarativeGeoMap::setPlugin(QDeclarativeGeoServiceProvider *plugin)
{
    if (plugin_) {
        qmlInfo(this) << tr("Plugin is a write-once property, and cannot be set again.");
        return;
    }
    plugin_ = plugin;
    emit pluginChanged(plugin_);

    if (plugin_->ready()) {
        pluginReady();
    } else {
        connect(plugin_, SIGNAL(supportedFeaturesChanged(PluginFeatures)),
                this, SLOT(pluginReady()));
    }
}

// this function will only be ever called once
void QDeclarativeGeoMap::mappingManagerInitialized()
{
    mappingManagerInitialized_ = true;
    if (zoomLevel_ < mappingManager_->minimumZoomLevel())
        setZoomLevel(mappingManager_->minimumZoomLevel());
    else if (zoomLevel_ > mappingManager_->maximumZoomLevel())
        setZoomLevel(mappingManager_->maximumZoomLevel());
    connect(map_,
            SIGNAL(updateRequired()),
            this,
            SLOT(update()));
    connect(map_->mapController(),
            SIGNAL(centerChanged(AnimatableCoordinate)),
            this,
            SLOT(mapCenterChanged(AnimatableCoordinate)));
    connect(map_->mapController(),
            SIGNAL(bearingChanged(qreal)),
            this,
            SLOT(mapBearingChanged(qreal)));
    connect(map_->mapController(),
            SIGNAL(tiltChanged(qreal)),
            this,
            SLOT(mapTiltChanged(qreal)));
    connect(map_->mapController(),
            SIGNAL(zoomChanged(qreal)),
            this,
            SLOT(mapZoomLevelChanged(qreal)));

    map_->setMappingManager(mappingManager_);
    map_->resize(width(), height());
    AnimatableCoordinate acenter = map_->mapController()->center();
    acenter.setCoordinate(center()->coordinate());
    map_->mapController()->setCenter(acenter);
    map_->mapController()->setZoom(zoomLevel_);
    map_->mapController()->setBearing(bearing_);
    map_->mapController()->setTilt(tilt_);

    QList<QGeoMapType> types = mappingManager_->supportedMapTypes();
    for (int i = 0; i < types.size(); ++i) {
        QDeclarativeGeoMapType *type = new QDeclarativeGeoMapType(types[i], this);
        supportedMapTypes_.append(type);
    }

    if (!supportedMapTypes_.isEmpty()) {
        QDeclarativeGeoMapType *type = supportedMapTypes_.at(0);
        activeMapType_ = type;
        map_->setActiveMapType(type->mapType());
    }

    map_->update();
    emit minimumZoomLevelChanged();
    emit maximumZoomLevelChanged();
    emit supportedMapTypesChanged();
    emit activeMapTypeChanged();
}

void QDeclarativeGeoMap::updateMapDisplay(const QRectF &target)
{
    Q_UNUSED(target);
    QQuickItem::update();
}

QDeclarativeGeoServiceProvider* QDeclarativeGeoMap::plugin() const
{
    return plugin_;
}

/*!
    \qmlproperty qreal QtLocation5::Map::minimumZoomLevel

    This property holds the minimum valid zoom level for the map.

    The minimum zoom level is defined by the \l plugin used.
    If plugin supporting mapping is not set, a -1.0 is returned.
*/

qreal QDeclarativeGeoMap::minimumZoomLevel() const
{
    if (mappingManager_)
        return mappingManager_->minimumZoomLevel();
    else
        return -1.0;
}

/*!
\qmlproperty qreal QtLocation5::Map::maximumZoomLevel

    This property holds the maximum valid zoom level for the map.

    The maximum zoom level is defined by the \l plugin used.
    If plugin supporting mapping is not set, a -1.0 is returned.
*/

qreal QDeclarativeGeoMap::maximumZoomLevel() const
{
    if (mappingManager_)
        return mappingManager_->maximumZoomLevel();
    else
        return -1.0;
}

void QDeclarativeGeoMap::setBearing(qreal bearing)
{
    if (bearing_ == bearing)
        return;
    bool clockwise = (bearing >= 0);
    qreal fractions = bearing - int(bearing);
    bearing = (int(qAbs(bearing))) % 359;
    if (!clockwise)
        bearing = (-1.0 * bearing) + 360;
    bearing_ = bearing + fractions;
    if (mappingManagerInitialized_)
        map_->mapController()->setBearing(bearing_);
    emit bearingChanged(bearing_);
}

/* <- put '!' mark here, temporarily undocumented until supported
    \qmlproperty qreal Map::bearing

    This property holds the current bearing (starting from 0 and increasing
    clockwise to 359,9 degrees) pointing up.

    For example setting bearing to 10 will set bearing 10 to point up, which
    visually looks like rotating the map counter-clockwise.

    You can also assign negative values, which will internally get
    translated into positive bearing (e.g. -10 equals 350). This is primarily for
    convenience (e.g. you can decrement bearing without worrying about it).
    Assigning values greater than abs(360) will be mod'd (e.g. 365 will result
    in 5).

    The default value is 0 corresponding North pointing up.
*/

qreal QDeclarativeGeoMap::bearing() const
{
    if (mappingManagerInitialized_) {
        if (map_->mapController()->bearing() >= 0)
            return map_->mapController()->bearing();
        else
            return map_->mapController()->bearing() + 360;
    } else {
        return bearing_;
    }
}

void QDeclarativeGeoMap::setTilt(qreal tilt)
{
    if (tilt_ == tilt || tilt > 85.0 || tilt < 0)
        return;
    tilt_ = tilt;
    if (mappingManagerInitialized_)
        map_->mapController()->setTilt(tilt);
    emit tiltChanged(tilt);
}

qreal QDeclarativeGeoMap::tilt() const
{
    if (!mappingManagerInitialized_)
        return tilt_;
    return map_->mapController()->tilt();
}

/*!
\qmlproperty qreal QtLocation5::Map::zoomLevel

    This property holds the zoom level for the map.

    Larger values for the zoom level provide more detail. Zoom levels
    are always non-negative. The default value is 8.0.
*/
void QDeclarativeGeoMap::setZoomLevel(qreal zoomLevel)
{
    if (zoomLevel_ == zoomLevel || zoomLevel < 0)
        return;
    if (mappingManagerInitialized_ &&
            (zoomLevel < mappingManager_->minimumZoomLevel() ||
             zoomLevel > mappingManager_->maximumZoomLevel())) {
        return;
    }
    zoomLevel_ = zoomLevel;
    if (mappingManagerInitialized_)
        map_->mapController()->setZoom(zoomLevel_);
    emit zoomLevelChanged(zoomLevel);
}

qreal QDeclarativeGeoMap::zoomLevel() const
{
    if (mappingManagerInitialized_)
        return map_->mapController()->zoom();
    else
        return zoomLevel_;
}

/*!
\qmlproperty Coordinate QtLocation5::Map::center

    This property holds the coordinate which occupies the center of the
    mapping viewport.

    The default value is an arbitrary valid coordinate.
*/
void QDeclarativeGeoMap::setCenter(QDeclarativeCoordinate *center)
{
    if (center == center_)
        return;
    if (center_)
        center_->disconnect(this);
    center_ = center;
    if (center_) {
        connect(center_,
                SIGNAL(latitudeChanged(double)),
                this,
                SLOT(centerLatitudeChanged(double)));
        connect(center_,
                SIGNAL(longitudeChanged(double)),
                this,
                SLOT(centerLongitudeChanged(double)));
        connect(center_,
                SIGNAL(altitudeChanged(double)),
                this,
                SLOT(centerAltitudeChanged(double)));
        if (center_->coordinate().isValid() && mappingManagerInitialized_) {
            AnimatableCoordinate acoord = map_->mapController()->center();
            acoord.setCoordinate(center_->coordinate());
            map_->mapController()->setCenter(acoord);
            update();
        }
    }
    emit centerChanged(center_);
}

QDeclarativeCoordinate* QDeclarativeGeoMap::center()
{
    if (!center_) {
        if (mappingManagerInitialized_)
            center_ = new QDeclarativeCoordinate(map_->mapController()->center().coordinate());
        else
            center_ = new QDeclarativeCoordinate(QGeoCoordinate(0, 0, 0));
        connect(center_,
                SIGNAL(latitudeChanged(double)),
                this,
                SLOT(centerLatitudeChanged(double)));
        connect(center_,
                SIGNAL(longitudeChanged(double)),
                this,
                SLOT(centerLongitudeChanged(double)));
        connect(center_,
                SIGNAL(altitudeChanged(double)),
                this,
                SLOT(centerAltitudeChanged(double)));
    }
    return center_;
}

void QDeclarativeGeoMap::mapZoomLevelChanged(qreal zoom)
{
    if (zoom == zoomLevel_)
        return;
    zoomLevel_ = zoom;
    emit zoomLevelChanged(zoomLevel_);
}

void QDeclarativeGeoMap::mapTiltChanged(qreal tilt)
{
    if (tilt == zoomLevel_)
        return;
    tilt_ = tilt;
    emit tiltChanged(tilt_);
}

void QDeclarativeGeoMap::mapBearingChanged(qreal bearing)
{
    if (bearing == bearing_)
        return;
    bearing_ = bearing;
    emit bearingChanged(bearing_);
}

void QDeclarativeGeoMap::mapCenterChanged(AnimatableCoordinate center)
{
    if (center.coordinate() != this->center()->coordinate()) {
        QDeclarativeCoordinate* currentCenter = this->center();
        currentCenter->setCoordinate(center.coordinate());
        emit centerChanged(currentCenter);
    }
}

void QDeclarativeGeoMap::centerLatitudeChanged(double latitude)
{
    if (qIsNaN(latitude))
        return;
    if (mappingManagerInitialized_) {
        AnimatableCoordinate acoord = map_->mapController()->center();
        QGeoCoordinate coord = acoord.coordinate();
        // if the change originated from app, emit (other changes via mapctrl signals)
        if (latitude != coord.latitude())
            emit centerChanged(center_);
        coord.setLatitude(latitude);
        acoord.setCoordinate(coord);
        map_->mapController()->setCenter(acoord);
        update();
    } else {
        emit centerChanged(center_);
    }
}

void QDeclarativeGeoMap::centerLongitudeChanged(double longitude)
{
    if (qIsNaN(longitude))
        return;
    if (mappingManagerInitialized_) {
        AnimatableCoordinate acoord = map_->mapController()->center();
        QGeoCoordinate coord = acoord.coordinate();
        // if the change originated from app, emit (other changes via mapctrl signals)
        if (longitude != coord.longitude())
            emit centerChanged(center_);
        coord.setLongitude(longitude);
        acoord.setCoordinate(coord);
        map_->mapController()->setCenter(acoord);
        update();
    } else {
        emit centerChanged(center_);
    }
}

void QDeclarativeGeoMap::centerAltitudeChanged(double altitude)
{
    if (qIsNaN(altitude))
        return;
    if (mappingManagerInitialized_) {
        AnimatableCoordinate acoord = map_->mapController()->center();
        QGeoCoordinate coord = acoord.coordinate();
        // if the change originated from app, emit (other changes via mapctrl signals)
        if (altitude != coord.altitude())
            emit centerChanged(center_);
        coord.setAltitude(altitude);
        acoord.setCoordinate(coord);
        map_->mapController()->setCenter(acoord);
        update();
    } else {
        emit centerChanged(center_);
    }
}

QDeclarativeListProperty<QDeclarativeGeoMapType> QDeclarativeGeoMap::supportedMapTypes()
{
    return QDeclarativeListProperty<QDeclarativeGeoMapType>(this, supportedMapTypes_);
}

/*!
    \qmlmethod QtLocation5::Map::toCoordinate(QPointF screenPosition)

    Returns the coordinate which corresponds to the screen position
    \a screenPosition.

    Returns an invalid coordinate if \a screenPosition is not within
    the current viewport.
*/

QDeclarativeCoordinate* QDeclarativeGeoMap::toCoordinate(QPointF screenPosition) const
{
    QGeoCoordinate coordinate;
    if (map_)
        coordinate = map_->screenPositionToCoordinate(screenPosition);
    // by default objects returned from method call get javascript ownership,
    // so we don't need to worry about this as long as we don't set the parent
    return new QDeclarativeCoordinate(coordinate);
}

/*!
\qmlmethod QtLocation5::Map::toScreenPosition(Coordinate coordinate)

    Returns the screen position which corresponds to the coordinate
    \a coordinate.

    Returns an invalid QPointF if \a coordinate is not within the
    current viewport.
*/

QPointF QDeclarativeGeoMap::toScreenPosition(QDeclarativeCoordinate* coordinate) const
{
    QPointF point(qQNaN(), qQNaN());
    if (coordinate && map_)
        point = map_->coordinateToScreenPosition(coordinate->coordinate());
    return point;
}

void QDeclarativeGeoMap::pan(int dx, int dy)
{
    if (!mappingManagerInitialized_)
        return;
    map_->mapController()->pan(dx, dy);
}

void QDeclarativeGeoMap::touchEvent(QTouchEvent *event)
{
    if (!mappingManagerInitialized_) {
        event->ignore();
        return;
    }
    QLOC_TRACE0;
    event->accept();
    pinchArea_->touchEvent(event);
}

void QDeclarativeGeoMap::wheelEvent(QWheelEvent *event)
{
    QLOC_TRACE0;
    event->accept();
    emit wheel(event->delta());
}

/*!
    \qmlmethod QtLocation5::Map::addMapItem(MapItem)

    Adds the given MapItem to the Map (e.g. MapQuickItem, MapCircle). If the object
    already is on the Map, it will not be added again.

    As an example, consider you have a MapCircle presenting your current position:

    \snippet TODO
    You can add it to Map (alternatively it can be defined as a child element of the Map):

    \snippet TODO
    Note: MapItemViews can not be added with this method.
*/

void QDeclarativeGeoMap::addMapItem(QDeclarativeGeoMapItemBase *item)
{
    QLOC_TRACE0;
    if (!item || item->quickMap())
        return;
    updateMutex_.lock();
    item->setParentItem(this);
    item->setMap(this, map_);
    mapItems_.append(item);
    emit mapItemsChanged();
    updateMutex_.unlock();
}

/*!
    \qmlmethod QtLocation5::Map::mapItems()

    Returns the list of all map items in no particular order.
    These items include items that were declared statically as part of
    the element declaration, as well as dynamical items (\l addMapItem,
    \l MapItemView).

    \snippet TODO

*/

QList<QObject*> QDeclarativeGeoMap::mapItems()
{
    return mapItems_;
}

void QDeclarativeGeoMap::removeMapItem(QDeclarativeGeoMapItemBase *item)
{
    QLOC_TRACE0;
    if (!item || !map_)
        return;
    if (!mapItems_.contains(item))
        return;
    updateMutex_.lock();
    item->setParentItem(0);
    item->setMap(0, 0);
    // these can be optmized for perf, as we already check the 'contains' above
    mapItems_.removeOne(item);
    emit mapItemsChanged();
    updateMutex_.unlock();
}

void QDeclarativeGeoMap::clearMapItems()
{
    QLOC_TRACE0;
    if (mapItems_.isEmpty())
        return;
    updateMutex_.lock();
    for (int i = 0; i < mapItems_.count(); ++i) {
        qobject_cast<QDeclarativeGeoMapItemBase*>(mapItems_.at(i))->setParentItem(0);
        qobject_cast<QDeclarativeGeoMapItemBase*>(mapItems_.at(i))->setMap(0, 0);
    }
    mapItems_.clear();
    emit mapItemsChanged();
    updateMutex_.unlock();
}

void QDeclarativeGeoMap::setActiveMapType(QDeclarativeGeoMapType *mapType)
{
    activeMapType_ = mapType;
    map_->setActiveMapType(mapType->mapType());
    emit activeMapTypeChanged();
}

QDeclarativeGeoMapType * QDeclarativeGeoMap::activeMapType() const
{
    return activeMapType_;
}

/*!
    \qmlmethod QtLocation5::Map::removeMapItem(MapItem)

    Removes the given MapItem from the Map. If the MapItem does not
    exist, function does nothing.

    As an example, consider you have a MapCircle presenting your current position:
    \snippet TODO

    You can remove it from the Map element:
    \snippet TODO

*/

void QDeclarativeGeoMap::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry)
{
    map_->resize(newGeometry.width(), newGeometry.height());
    QQuickItem::geometryChanged(newGeometry, oldGeometry);
}

#include "moc_qdeclarativegeomap_p.cpp"

QT_END_NAMESPACE