1 /****************************************************************************
3 ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4 ** All rights reserved.
5 ** Contact: Nokia Corporation (qt-info@nokia.com)
7 ** This file is part of the examples of the Qt Toolkit.
9 ** $QT_BEGIN_LICENSE:BSD$
10 ** You may use this file under the terms of the BSD license as follows:
12 ** "Redistribution and use in source and binary forms, with or without
13 ** modification, are permitted provided that the following conditions are
15 ** * Redistributions of source code must retain the above copyright
16 ** notice, this list of conditions and the following disclaimer.
17 ** * Redistributions in binary form must reproduce the above copyright
18 ** notice, this list of conditions and the following disclaimer in
19 ** the documentation and/or other materials provided with the
21 ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
22 ** the names of its contributors may be used to endorse or promote
23 ** products derived from this software without specific prior written
26 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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39 ****************************************************************************/
41 #include <QtDeclarative/QDeclarativeExtensionPlugin>
42 #include <QtDeclarative/qdeclarative.h>
44 #include <qdatetime.h>
45 #include <qbasictimer.h>
46 #include <qapplication.h>
48 // Implements a "TimeModel" class with hour and minute properties
49 // that change on-the-minute yet efficiently sleep the rest
52 class MinuteTimer : public QObject
56 MinuteTimer(QObject *parent) : QObject(parent)
62 if (!timer.isActive()) {
63 time = QTime::currentTime();
64 timer.start(60000-time.second()*1000, this);
73 int hour() const { return time.hour(); }
74 int minute() const { return time.minute(); }
80 void timerEvent(QTimerEvent *)
82 QTime now = QTime::currentTime();
83 if (now.second() == 59 && now.minute() == time.minute() && now.hour() == time.hour()) {
84 // just missed time tick over, force it, wait extra 0.5 seconds
86 timer.start(60500, this);
89 timer.start(60000-time.second()*1000, this);
100 class TimeModel : public QObject
103 Q_PROPERTY(int hour READ hour NOTIFY timeChanged)
104 Q_PROPERTY(int minute READ minute NOTIFY timeChanged)
108 TimeModel(QObject *parent=0) : QObject(parent)
110 if (++instances == 1) {
112 timer = new MinuteTimer(qApp);
113 connect(timer, SIGNAL(timeChanged()), this, SIGNAL(timeChanged()));
120 if (--instances == 0) {
125 int minute() const { return timer->minute(); }
126 int hour() const { return timer->hour(); }
133 static MinuteTimer *timer;
134 static int instances;
137 int TimeModel::instances=0;
138 MinuteTimer *TimeModel::timer=0;
141 class QExampleQmlPlugin : public QDeclarativeExtensionPlugin
145 void registerTypes(const char *uri)
147 Q_ASSERT(uri == QLatin1String("com.nokia.TimeExample"));
148 qmlRegisterType<TimeModel>(uri, 1, 0, "Time");
153 #include "plugin.moc"
156 Q_EXPORT_PLUGIN2(qmlqtimeexampleplugin, QExampleQmlPlugin);