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+/****************************************************************************
+**
+** Copyright (C) 2011 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;
+};
+
+//![0]
+class TimeModel : public QObject
+{
+ Q_OBJECT
+ Q_PROPERTY(int hour READ hour NOTIFY timeChanged)
+ Q_PROPERTY(int minute READ minute NOTIFY timeChanged)
+//![0]
+
+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;
+
+//![plugin]
+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");
+ }
+};
+//![plugin]
+
+#include "plugin.moc"
+
+//![export]
+Q_EXPORT_PLUGIN2(qmlqtimeexampleplugin, QExampleQmlPlugin);
+//![export]