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diff --git a/examples/qml/qmlextensionplugins/timemodel.cpp b/examples/qml/qmlextensionplugins/timemodel.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+** * Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** * Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in
+** the documentation and/or other materials provided with the
+** distribution.
+** * Neither the name of The Qt Company Ltd nor the names of its
+** contributors may be used to endorse or promote products derived
+** from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "timemodel.h"
+
+int TimeModel::instances=0;
+MinuteTimer *TimeModel::timer=nullptr;
+
+void MinuteTimer::start()
+{
+ if (!timer.isActive()) {
+ time = QTime::currentTime();
+ timer.start(60000-time.second()*1000, this);
+ }
+}
+
+void MinuteTimer::stop()
+{
+ timer.stop();
+}
+
+void MinuteTimer::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 = time.addSecs(60);
+ timer.start(60500, this);
+ } else {
+ time = now;
+ timer.start(60000-time.second()*1000, this);
+ }
+ emit timeChanged();
+}
+
+TimeModel::TimeModel(QObject *parent) : QObject(parent)
+{
+ if (++instances == 1) {
+ if (!timer)
+ timer = new MinuteTimer(QCoreApplication::instance());
+ connect(timer, &MinuteTimer::timeChanged, this, &TimeModel::timeChanged);
+ timer->start();
+ }
+}
+
+TimeModel::~TimeModel()
+{
+ if (--instances == 0) {
+ timer->stop();
+ }
+}