1 files changed, 134 insertions, 0 deletions
diff --git a/src/plugins/position/positionpoll/qgeoareamonitor_polling.cpp b/src/plugins/position/positionpoll/qgeoareamonitor_polling.cpp
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+++ b/src/plugins/position/positionpoll/qgeoareamonitor_polling.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtLocation 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qgeoareamonitor_polling.h"
+#include <qgeocoordinate.h>
+
+#include <QtCore/qmetaobject.h>
+
+#define UPDATE_INTERVAL_5S  5000
+
+QGeoAreaMonitorPolling::QGeoAreaMonitorPolling(QObject *parent) : QGeoAreaMonitor(parent)
+{
+    insideArea = false;
+    location = QGeoPositionInfoSource::createDefaultSource(this);
+    if (location) {
+        location->setUpdateInterval(UPDATE_INTERVAL_5S);
+        connect(location, SIGNAL(positionUpdated(QGeoPositionInfo)),
+                this, SLOT(positionUpdated(QGeoPositionInfo)));
+    }
+}
+
+QGeoAreaMonitorPolling::~QGeoAreaMonitorPolling()
+{
+    if (location)
+        location->stopUpdates();
+}
+
+void QGeoAreaMonitorPolling::setCenter(const QGeoCoordinate &coordinate)
+{
+    if (coordinate.isValid()) {
+        QGeoAreaMonitor::setCenter(coordinate);
+        checkStartStop();
+    }
+}
+
+void QGeoAreaMonitorPolling::setRadius(qreal radius)
+{
+    QGeoAreaMonitor::setRadius(radius);
+    checkStartStop();
+}
+
+static QMetaMethod areaEnteredSignal()
+{
+    static QMetaMethod signal = QMetaMethod::fromSignal(&QGeoAreaMonitorPolling::areaEntered);
+    return signal;
+}
+
+static QMetaMethod areaExitedSignal()
+{
+    static QMetaMethod signal = QMetaMethod::fromSignal(&QGeoAreaMonitorPolling::areaExited);
+    return signal;
+}
+
+void QGeoAreaMonitorPolling::connectNotify(const QMetaMethod &signal)
+{
+    if (signal == areaEnteredSignal() ||
+            signal == areaExitedSignal())
+        checkStartStop();
+}
+
+void QGeoAreaMonitorPolling::disconnectNotify(const QMetaMethod &signal)
+{
+    if (signal == areaEnteredSignal() ||
+            signal == areaExitedSignal())
+        checkStartStop();
+}
+
+void QGeoAreaMonitorPolling::checkStartStop()
+{
+    if (!location) return;
+
+    if ((isSignalConnected(areaEnteredSignal()) ||
+            isSignalConnected(areaExitedSignal())) &&
+            QGeoAreaMonitor::center().isValid() &&
+            QGeoAreaMonitor::radius() > qreal(0.0)) {
+        location->startUpdates();
+    } else {
+        location->stopUpdates();
+    }
+}
+
+void QGeoAreaMonitorPolling::positionUpdated(const QGeoPositionInfo &info)
+{
+    double distance = info.coordinate().distanceTo(QGeoAreaMonitor::center());
+
+    if (distance <= QGeoAreaMonitor::radius()) {
+        if (!insideArea)
+            emit areaEntered(info);
+        insideArea = true;
+    } else if (insideArea) {
+        emit areaExited(info);
+        insideArea = false;
+    }
+}
+
+#include "moc_qgeoareamonitor_polling.cpp"