--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/declarative/cppextensions/plugins/plugin.cpp	Tue Jul 06 15:10:48 2010 +0300
@@ -0,0 +1,151 @@
+/****************************************************************************
+**
+** 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.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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 Nokia Corporation and its Subsidiary(-ies) 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 <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);