From a52dae6a79c1c19ee2391037cfdc6d557381bb88 Mon Sep 17 00:00:00 2001
From: Paolo Angelelli <paolo.angelelli@qt.io>
Date: Wed, 30 Jan 2019 20:59:59 +0100
Subject: [PATCH] Introduce Qt.labs.location QtLocationLabs singleton type
This singleton is meant to offer tech-preview map-related API.
It starts with a mapObjectsAt invokable, that can be used to probe
MapObjects at a specific coordinate of a map.
Reference implementation for Q*ObjectQSG, based on QGeoShape::contains,
included.
Change-Id: Ief692eb5a43115ca02d4642c82023d1b2e217400
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>
---
src/imports/location/location.cpp | 1 +
src/imports/locationlabs/locationlabs.cpp | 10 ++-
src/imports/locationlabs/locationlabs.pro | 6 +-
.../locationlabs/locationlabssingleton.cpp | 81 +++++++++++++++++++
.../locationlabs/locationlabssingleton_p.h | 68 ++++++++++++++++
src/imports/positioning/locationsingleton.h | 11 +++
.../declarativemaps/qgeomapobject_p.h | 4 +
src/location/labs/qgeotiledmaplabs.cpp | 37 +++++++++
src/location/labs/qgeotiledmaplabs_p.h | 1 +
.../labs/qsg/qgeomapobjectqsgsupport.cpp | 6 +-
src/location/labs/qsg/qmaprouteobjectqsg.cpp | 5 ++
.../labs/qsg/qmaprouteobjectqsg_p_p.h | 1 +
src/location/maps/qgeomap.cpp | 5 ++
src/location/maps/qgeomap_p.h | 1 +
.../itemsoverlay/qgeomapitemsoverlay.cpp | 39 +++++++++
.../itemsoverlay/qgeomapitemsoverlay.h | 1 +
src/positioning/qlocationutils_p.h | 8 +-
17 files changed, 281 insertions(+), 4 deletions(-)
create mode 100644 src/imports/locationlabs/locationlabssingleton.cpp
create mode 100644 src/imports/locationlabs/locationlabssingleton_p.h
diff --git a/src/imports/location/location.cpp b/src/imports/location/location.cpp
index 049d52c09..5d1b6e232 100644
--- a/src/imports/location/location.cpp
+++ b/src/imports/location/location.cpp
@@ -176,6 +176,7 @@ public:
// Register the 5.11 types
minor = 11;
+ qmlRegisterType<QGeoMapObject>();
qmlRegisterType<QDeclarativeGeoManeuver, 11>(uri, major, minor, "RouteManeuver");
qmlRegisterType<QDeclarativeGeoMap, 11>(uri, major, minor, "Map");
qmlRegisterUncreatableType<QDeclarativeGeoMapItemBase, 11>(uri, major, minor, "GeoMapItemBase",
diff --git a/src/imports/locationlabs/locationlabs.cpp b/src/imports/locationlabs/locationlabs.cpp
index c90993eb1..09fba2846 100644
--- a/src/imports/locationlabs/locationlabs.cpp
+++ b/src/imports/locationlabs/locationlabs.cpp
@@ -43,13 +43,20 @@
#include <QtLocation/private/qdeclarativenavigator_p.h>
#include <QtLocation/private/qdeclarativenavigator_p_p.h>
#include <QtLocation/private/qnavigationmanagerengine_p.h>
-
#include <QtQml/qqmlextensionplugin.h>
#include <QtQml/qqml.h>
#include <QtCore/QDebug>
+#include "locationlabssingleton_p.h"
QT_BEGIN_NAMESPACE
+static QObject *singleton_type_factory(QQmlEngine *engine, QJSEngine *jsEngine)
+{
+ Q_UNUSED(engine);
+ Q_UNUSED(jsEngine);
+
+ return new LocationLabsSingleton;
+}
class QtLocationLabsDeclarativeModule: public QQmlExtensionPlugin
{
@@ -78,6 +85,7 @@ public:
qmlRegisterType<QDeclarativeNavigationBasicDirections>();
qmlRegisterType<QDeclarativeNavigator>(uri, major, minor, "Navigator");
qmlRegisterType<QAbstractNavigator>();
+ qmlRegisterSingletonType<LocationLabsSingleton>(uri, major, minor, "QtLocationLabs", singleton_type_factory);
} else {
qDebug() << "Unsupported URI given to load location QML plugin: " << QLatin1String(uri);
}
diff --git a/src/imports/locationlabs/locationlabs.pro b/src/imports/locationlabs/locationlabs.pro
index 2fcc1adc4..c55b09b88 100644
--- a/src/imports/locationlabs/locationlabs.pro
+++ b/src/imports/locationlabs/locationlabs.pro
@@ -5,8 +5,12 @@ CXX_MODULE = $$TARGET
TARGETPATH = Qt/labs/location
IMPORT_VERSION = 1.0
+HEADERS += \
+ locationlabssingleton_p.h
+
SOURCES += \
- locationlabs.cpp
+ locationlabs.cpp \
+ locationlabssingleton.cpp
#CONFIG += no_cxx_module
load(qml_plugin)
diff --git a/src/imports/locationlabs/locationlabssingleton.cpp b/src/imports/locationlabs/locationlabssingleton.cpp
new file mode 100644
index 000000000..c053da9e0
--- /dev/null
+++ b/src/imports/locationlabs/locationlabssingleton.cpp
@@ -0,0 +1,81 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtPositioning module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "locationlabssingleton_p.h"
+
+/*!
+ \qmltype QtLocationLabs
+ \instantiates LocationLabsSingleton
+ \inqmlmodule Qt.labs.location
+ \since 5.13
+
+ \brief The QtLocationLabs global object provides experimental, tech-preview functions for working with
+ location-based types in QML.
+
+ \qml
+ import Qt.labs.location 1.0
+
+ Map {
+ id: map
+ MouseArea {
+ anchors.fill: parent
+ onClicked: {
+ var mapObjects = QtLocationLabs.mapObjectsAt(map.toCoordinate(Qt.point(mouseX,mouseY)), map)
+ }
+ }
+ }
+ \endqml
+*/
+
+LocationLabsSingleton::LocationLabsSingleton(QObject *parent)
+: QObject(parent)
+{
+}
+
+/*!
+ \qmlmethod coordinate ::QtLocationLabs::mapObjectsAt(coordinate, map)
+
+ Returns the map objects in \a map covering \a coordinate.
+*/
+QList<QObject *> LocationLabsSingleton::mapObjectsAt(const QGeoCoordinate &coordinate, QDeclarativeGeoMap *map) const
+{
+ if (!map)
+ return QList<QObject *>();
+ return map->map()->mapObjectsAt(coordinate);
+}
diff --git a/src/imports/locationlabs/locationlabssingleton_p.h b/src/imports/locationlabs/locationlabssingleton_p.h
new file mode 100644
index 000000000..42f4a21c8
--- /dev/null
+++ b/src/imports/locationlabs/locationlabssingleton_p.h
@@ -0,0 +1,68 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtPositioning module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef LOCATIONLABSSINGLETON_P_H
+#define LOCATIONLABSSINGLETON_P_H
+
+//
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/QObject>
+#include <QtPositioning/QGeoCoordinate>
+#include <QtLocation/private/qdeclarativegeomap_p.h>
+
+class LocationLabsSingleton : public QObject
+{
+ Q_OBJECT
+
+public:
+ explicit LocationLabsSingleton(QObject *parent = 0);
+
+ Q_INVOKABLE QList<QObject *> mapObjectsAt(const QGeoCoordinate &coordinate, QDeclarativeGeoMap *map) const;
+};
+
+#endif // LOCATIONLABSSINGLETON_P_H
diff --git a/src/imports/positioning/locationsingleton.h b/src/imports/positioning/locationsingleton.h
index 9372b8f1a..16d838e67 100644
--- a/src/imports/positioning/locationsingleton.h
+++ b/src/imports/positioning/locationsingleton.h
@@ -40,6 +40,17 @@
#ifndef LOCATIONSINGLETON_H
#define LOCATIONSINGLETON_H
+//
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
#include <QtCore/QObject>
#include <QtCore/qnumeric.h>
#include <QtPositioning/QGeoCoordinate>
diff --git a/src/location/declarativemaps/qgeomapobject_p.h b/src/location/declarativemaps/qgeomapobject_p.h
index bc63e0a6c..000d83206 100644
--- a/src/location/declarativemaps/qgeomapobject_p.h
+++ b/src/location/declarativemaps/qgeomapobject_p.h
@@ -51,6 +51,7 @@
#include <QtLocation/private/qparameterizableobject_p.h>
#include <QExplicitlySharedDataPointer>
#include <QtPositioning/qgeoshape.h>
+#include <qqml.h>
QT_BEGIN_NAMESPACE
@@ -133,6 +134,9 @@ protected:
friend class QGeoMapLayer;
friend class QDeclarativeNavigator;
};
+
QT_END_NAMESPACE
+QML_DECLARE_TYPE(QGeoMapObject)
+
#endif // QGEOMAPOBJECTBASE_H
diff --git a/src/location/labs/qgeotiledmaplabs.cpp b/src/location/labs/qgeotiledmaplabs.cpp
index 22d582c0e..7d8d71080 100644
--- a/src/location/labs/qgeotiledmaplabs.cpp
+++ b/src/location/labs/qgeotiledmaplabs.cpp
@@ -44,6 +44,8 @@
#include <QtLocation/private/qmapiconobjectqsg_p_p.h>
#include <QtLocation/private/qdeclarativepolylinemapitem_p.h>
#include <QtLocation/private/qgeomapobjectqsgsupport_p.h>
+#include <QtPositioning/private/qlocationutils_p.h>
+#include <math.h>
QT_BEGIN_NAMESPACE
@@ -57,6 +59,7 @@ public:
QGeoMapObjectPrivate *createMapObjectImplementation(QGeoMapObject *obj) override;
virtual QList<QGeoMapObject *> mapObjects() const override;
void removeMapObject(QGeoMapObject *obj);
+ QList<QObject *>mapObjectsAt(const QGeoCoordinate &coordinate) const;
void updateMapObjects(QSGNode *root, QQuickWindow *window);
void updateObjectsGeometry();
@@ -95,6 +98,34 @@ void QGeoTiledMapLabsPrivate::removeMapObject(QGeoMapObject *obj)
m_qsgSupport.removeMapObject(obj);
}
+QList<QObject *> QGeoTiledMapLabsPrivate::mapObjectsAt(const QGeoCoordinate &coordinate) const
+{
+ // ToDo: use a space partitioning strategy
+ QList<QObject *> res;
+ for (const auto o: mapObjects()) {
+ // explicitly handle lines
+ bool contains = false;
+ if (o->type() == QGeoMapObject::PolylineType ) {
+ QMapPolylineObject *mpo = static_cast<QMapPolylineObject *>(o);
+ qreal mpp = QLocationUtils::metersPerPixel(m_cameraData.zoomLevel(), coordinate);
+ QGeoPath path = o->geoShape();
+ path.setWidth(mpp * mpo->border()->width());
+ contains = path.contains(coordinate);
+ } else if (o->type() == QGeoMapObject::RouteType) {
+ qreal mpp = QLocationUtils::metersPerPixel(m_cameraData.zoomLevel(), coordinate);
+ QGeoPath path = o->geoShape();
+ path.setWidth(mpp * 4); // MapRouteObjectQSG has a hardcoded 4 pixels width;
+ contains = path.contains(coordinate);
+ } else {
+ contains = o->geoShape().contains(coordinate);
+ }
+
+ if (contains)
+ res.append(o);
+ }
+ return res;
+}
+
void QGeoTiledMapLabsPrivate::updateMapObjects(QSGNode *root, QQuickWindow *window)
{
m_qsgSupport.updateMapObjects(root, window);
@@ -161,6 +192,12 @@ void QGeoTiledMapLabs::removeMapObject(QGeoMapObject *obj)
d->removeMapObject(obj);
}
+QList<QObject *> QGeoTiledMapLabs::mapObjectsAt(const QGeoCoordinate &coordinate) const
+{
+ Q_D(const QGeoTiledMapLabs);
+ return d->mapObjectsAt(coordinate);
+}
+
QGeoTiledMapLabs::QGeoTiledMapLabs(QGeoTiledMapLabsPrivate &dd, QGeoTiledMappingManagerEngine *engine, QObject *parent)
: QGeoTiledMap(dd, engine, parent)
{
diff --git a/src/location/labs/qgeotiledmaplabs_p.h b/src/location/labs/qgeotiledmaplabs_p.h
index 4f1790287..d10ec6338 100644
--- a/src/location/labs/qgeotiledmaplabs_p.h
+++ b/src/location/labs/qgeotiledmaplabs_p.h
@@ -72,6 +72,7 @@ public:
bool createMapObjectImplementation(QGeoMapObject *obj) override;
void removeMapObject(QGeoMapObject *obj) override;
+ QList<QObject *> mapObjectsAt(const QGeoCoordinate &coordinate) const override;
protected:
QSGNode *updateSceneGraph(QSGNode *node, QQuickWindow *window) override;
diff --git a/src/location/labs/qsg/qgeomapobjectqsgsupport.cpp b/src/location/labs/qsg/qgeomapobjectqsgsupport.cpp
index e0e3a6d74..1a1b102b3 100644
--- a/src/location/labs/qsg/qgeomapobjectqsgsupport.cpp
+++ b/src/location/labs/qsg/qgeomapobjectqsgsupport.cpp
@@ -126,7 +126,11 @@ QGeoMapObjectPrivate *QGeoMapObjectQSGSupport::createMapObjectImplementationPriv
QList<QGeoMapObject *> QGeoMapObjectQSGSupport::mapObjects() const
{
- return QList<QGeoMapObject *>();
+ QList<QGeoMapObject *> res;
+ for (int i = 0; i < m_mapObjects.size(); ++i) {
+ res.append(m_mapObjects.at(i).object.data());
+ }
+ return res;
}
void QGeoMapObjectQSGSupport::removeMapObject(QGeoMapObject *obj)
diff --git a/src/location/labs/qsg/qmaprouteobjectqsg.cpp b/src/location/labs/qsg/qmaprouteobjectqsg.cpp
index eaea64f33..8f347f884 100644
--- a/src/location/labs/qsg/qmaprouteobjectqsg.cpp
+++ b/src/location/labs/qsg/qmaprouteobjectqsg.cpp
@@ -100,4 +100,9 @@ void QMapRouteObjectPrivateQSG::setVisible(bool visible)
m_polyline->setVisible(visible);
}
+QGeoShape QMapRouteObjectPrivateQSG::geoShape() const
+{
+ return m_polyline->geoShape();
+}
+
QT_END_NAMESPACE
diff --git a/src/location/labs/qsg/qmaprouteobjectqsg_p_p.h b/src/location/labs/qsg/qmaprouteobjectqsg_p_p.h
index 0c946259f..2ade5d534 100644
--- a/src/location/labs/qsg/qmaprouteobjectqsg_p_p.h
+++ b/src/location/labs/qsg/qmaprouteobjectqsg_p_p.h
@@ -80,6 +80,7 @@ public:
QGeoMapObjectPrivate *clone() override;
void setMap(QGeoMap *map) override;
void setVisible(bool visible) override;
+ virtual QGeoShape geoShape() const override;
// Data Members
QScopedPointer<QMapPolylineObjectPrivateQSG> m_polyline;
diff --git a/src/location/maps/qgeomap.cpp b/src/location/maps/qgeomap.cpp
index 80edac1af..dc8aa2c87 100644
--- a/src/location/maps/qgeomap.cpp
+++ b/src/location/maps/qgeomap.cpp
@@ -305,6 +305,11 @@ void QGeoMap::removeMapObject(QGeoMapObject * /*obj*/)
{
}
+QList<QObject *> QGeoMap::mapObjectsAt(const QGeoCoordinate &/*coordinate*/) const
+{
+ return QList<QObject *>();
+}
+
void QGeoMap::setVisibleArea(const QRectF &visibleArea)
{
Q_D(QGeoMap);
diff --git a/src/location/maps/qgeomap_p.h b/src/location/maps/qgeomap_p.h
index c0af9e10c..216c8b64f 100644
--- a/src/location/maps/qgeomap_p.h
+++ b/src/location/maps/qgeomap_p.h
@@ -154,6 +154,7 @@ public:
virtual void setCopyrightVisible(bool visible);
virtual void removeMapObject(QGeoMapObject *obj);
+ virtual QList<QObject *> mapObjectsAt(const QGeoCoordinate &coordinate) const;
void setVisibleArea(const QRectF &visibleArea);
QRectF visibleArea() const;
diff --git a/src/plugins/geoservices/itemsoverlay/qgeomapitemsoverlay.cpp b/src/plugins/geoservices/itemsoverlay/qgeomapitemsoverlay.cpp
index f65204849..1ebad08da 100644
--- a/src/plugins/geoservices/itemsoverlay/qgeomapitemsoverlay.cpp
+++ b/src/plugins/geoservices/itemsoverlay/qgeomapitemsoverlay.cpp
@@ -65,6 +65,7 @@ public:
virtual QList<QGeoMapObject *> mapObjects() const override;
void removeMapObject(QGeoMapObject *obj);
void updateMapObjects(QSGNode *root, QQuickWindow *window);
+ QList<QObject *>mapObjectsAt(const QGeoCoordinate &coordinate) const;
QGeoMapObjectQSGSupport m_qsgSupport;
#endif
@@ -137,6 +138,16 @@ void QGeoMapItemsOverlay::removeMapObject(QGeoMapObject *obj)
#endif
}
+QList<QObject *> QGeoMapItemsOverlay::mapObjectsAt(const QGeoCoordinate &coordinate) const
+{
+#ifdef LOCATIONLABS
+ Q_D(const QGeoMapItemsOverlay);
+ return d->mapObjectsAt(coordinate);
+#else
+ return QGeoMap::mapObjectsAt(coordinate);
+#endif
+}
+
void QGeoMapItemsOverlayPrivate::setVisibleArea(const QRectF &visibleArea)
{
Q_Q(QGeoMapItemsOverlay);
@@ -185,6 +196,34 @@ void QGeoMapItemsOverlayPrivate::updateMapObjects(QSGNode *root, QQuickWindow *w
{
m_qsgSupport.updateMapObjects(root, window);
}
+
+QList<QObject *> QGeoMapItemsOverlayPrivate::mapObjectsAt(const QGeoCoordinate &coordinate) const
+{
+ // ToDo: use a space partitioning strategy
+ QList<QObject *> res;
+ for (const auto o: mapObjects()) {
+ // explicitly handle lines
+ bool contains = false;
+ if (o->type() == QGeoMapObject::PolylineType ) {
+ QMapPolylineObject *mpo = static_cast<QMapPolylineObject *>(o);
+ qreal mpp = QLocationUtils::metersPerPixel(m_cameraData.zoomLevel(), coordinate);
+ QGeoPath path = o->geoShape();
+ path.setWidth(mpp * mpo->border()->width());
+ contains = path.contains(coordinate);
+ } else if (o->type() == QGeoMapObject::RouteType) {
+ qreal mpp = QLocationUtils::metersPerPixel(m_cameraData.zoomLevel(), coordinate);
+ QGeoPath path = o->geoShape();
+ path.setWidth(mpp * 4); // MapRouteObjectQSG has a hardcoded 4 pixels width;
+ contains = path.contains(coordinate);
+ } else {
+ contains = o->geoShape().contains(coordinate);
+ }
+
+ if (contains)
+ res.append(o);
+ }
+ return res;
+}
#endif
void QGeoMapItemsOverlayPrivate::updateObjectsGeometry()
diff --git a/src/plugins/geoservices/itemsoverlay/qgeomapitemsoverlay.h b/src/plugins/geoservices/itemsoverlay/qgeomapitemsoverlay.h
index 1594ffb31..c287345c3 100644
--- a/src/plugins/geoservices/itemsoverlay/qgeomapitemsoverlay.h
+++ b/src/plugins/geoservices/itemsoverlay/qgeomapitemsoverlay.h
@@ -56,6 +56,7 @@ public:
QGeoMap::Capabilities capabilities() const override;
bool createMapObjectImplementation(QGeoMapObject *obj) override;
void removeMapObject(QGeoMapObject *obj) override;
+ QList<QObject *> mapObjectsAt(const QGeoCoordinate &coordinate) const override;
protected:
QSGNode *updateSceneGraph(QSGNode *node, QQuickWindow *window) override;
diff --git a/src/positioning/qlocationutils_p.h b/src/positioning/qlocationutils_p.h
index d9e6524a3..e3881f6f5 100644
--- a/src/positioning/qlocationutils_p.h
+++ b/src/positioning/qlocationutils_p.h
@@ -229,7 +229,7 @@ public:
return 6371007.2;
}
- inline static double earthMeanDiameter()
+ inline static double earthMeanCircumference()
{
return earthMeanRadius() * 2.0 * M_PI;
}
@@ -256,6 +256,12 @@ public:
return wrapLong(centerLongitude - leftOffset);
}
+ static qreal metersPerPixel(qreal zoomLevel, const QGeoCoordinate &coordinate)
+ {
+ const qreal metersPerTile = earthMeanCircumference() * std::cos(radians(coordinate.latitude())) / std::pow(2, zoomLevel);
+ return metersPerTile / 256.0;
+ }
+
/*
returns the NMEA sentence type.
*/
--
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