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+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtDeclarative/QDeclarativeExtensionPlugin>
+#include <QtDeclarative/qdeclarative.h>
+#include <qdebug.h>
+#include <qdatetime.h>
+#include <qbasictimer.h>
+#include <qapplication.h>
+
+// Implements a "TimeModel" class with hour and minute properties
+// that change on-the-minute yet efficiently sleep the rest
+// of the time.
+
+class MinuteTimer : public QObject
+{
+    Q_OBJECT
+public:
+    MinuteTimer(QObject *parent) : QObject(parent)
+    {
+    }
+
+    void start()
+    {
+        if (!timer.isActive()) {
+            time = QTime::currentTime();
+            timer.start(60000-time.second()*1000, this);
+        }
+    }
+
+    void stop()
+    {
+        timer.stop();
+    }
+
+    int hour() const { return time.hour(); }
+    int minute() const { return time.minute(); }
+
+signals:
+    void timeChanged();
+
+protected:
+    void timerEvent(QTimerEvent *)
+    {
+        QTime now = QTime::currentTime();
+        if (now.second() == 59 && now.minute() == time.minute() && now.hour() == time.hour()) {
+            // just missed time tick over, force it, wait extra 0.5 seconds
+            time.addSecs(60);
+            timer.start(60500, this);
+        } else {
+            time = now;
+            timer.start(60000-time.second()*1000, this);
+        }
+        emit timeChanged();
+    }
+
+private:
+    QTime time;
+    QBasicTimer timer;
+};
+
+class TimeModel : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(int hour READ hour NOTIFY timeChanged)
+    Q_PROPERTY(int minute READ minute NOTIFY timeChanged)
+
+public:
+    TimeModel(QObject *parent=0) : QObject(parent)
+    {
+        if (++instances == 1) {
+            if (!timer)
+                timer = new MinuteTimer(qApp);
+            connect(timer, SIGNAL(timeChanged()), this, SIGNAL(timeChanged()));
+            timer->start();
+        }
+    }
+
+    ~TimeModel()
+    {
+        if (--instances == 0) {
+            timer->stop();
+        }
+    }
+
+    int minute() const { return timer->minute(); }
+    int hour() const { return timer->hour(); }
+
+signals:
+    void timeChanged();
+
+private:
+    QTime t;
+    static MinuteTimer *timer;
+    static int instances;
+};
+
+int TimeModel::instances=0;
+MinuteTimer *TimeModel::timer=0;
+
+class QExampleQmlPlugin : public QDeclarativeExtensionPlugin
+{
+    Q_OBJECT
+public:
+    void registerTypes(const char *uri)
+    {
+        Q_ASSERT(uri == QLatin1String("com.nokia.TimeExample"));
+        qmlRegisterType<TimeModel>(uri, 1, 0, "Time");
+    }
+};
+
+#include "plugin.moc"
+
+Q_EXPORT_PLUGIN2(qtimeexampleqmlplugin, QExampleQmlPlugin);