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+/****************************************************************************
+**
+** Copyright (C) 2009 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/qmlmoduleplugin.h>
+#include <QtDeclarative/qml.h>
+#include <qdebug.h>
+#include <qdatetime.h>
+#include <qbasictimer.h>
+#include <qapplication.h>
+
+// Implements a "Time" 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 Time : public QObject
+{
+ Q_OBJECT
+ Q_PROPERTY(int hour READ hour NOTIFY timeChanged)
+ Q_PROPERTY(int minute READ minute NOTIFY timeChanged)
+
+public:
+ Time(QObject *parent=0) : QObject(parent)
+ {
+ if (++instances == 1) {
+ if (!timer)
+ timer = new MinuteTimer(qApp);
+ connect(timer, SIGNAL(timeChanged()), this, SIGNAL(timeChanged()));
+ timer->start();
+ }
+ }
+
+ ~Time()
+ {
+ 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 Time::instances=0;
+MinuteTimer *Time::timer=0;
+
+
+QML_DECLARE_TYPE(Time);
+
+
+class QExampleQmlPlugin : public QmlModulePlugin
+{
+ Q_OBJECT
+public:
+ QStringList keys() const
+ {
+ return QStringList() << QLatin1String("com.nokia.TimeExample");
+ }
+
+ void defineModule(const QString& uri)
+ {
+ Q_ASSERT(uri == QLatin1String("com.nokia.TimeExample"));
+ qmlRegisterType<Time>("com.nokia.TimeExample", 1, 0, "Time", "Time");
+ }
+};
+
+#include "plugin.moc"
+
+Q_EXPORT_PLUGIN2(qtimeexampleqmlplugin, QExampleQmlPlugin);