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50
51#ifndef TIMEMODEL_H
52#define TIMEMODEL_H
53
54#include <QtQml/qqml.h>
55#include <QtCore/qdatetime.h>
56#include <QtCore/qbasictimer.h>
57#include <QtCore/qcoreapplication.h>
58
59// Implements a "TimeModel" class with hour and minute properties
60// that change on-the-minute yet efficiently sleep the rest
61// of the time.
62
63class MinuteTimer : public QObject
64{
65 Q_OBJECT
66public:
67 MinuteTimer(QObject *parent) : QObject(parent) {}
68
69 void start();
70 void stop();
71
72 int hour() const { return time.hour(); }
73 int minute() const { return time.minute(); }
74
75signals:
76 void timeChanged();
77
78protected:
79 void timerEvent(QTimerEvent *) override;
80
81private:
82 QTime time;
83 QBasicTimer timer;
84};
85
86//![0]
87class TimeModel : public QObject
88{
89 Q_OBJECT
90 Q_PROPERTY(int hour READ hour NOTIFY timeChanged)
91 Q_PROPERTY(int minute READ minute NOTIFY timeChanged)
92 QML_NAMED_ELEMENT(Time)
93//![0]
94
95public:
96 TimeModel(QObject *parent=nullptr);
97 ~TimeModel() override;
98
99 int minute() const { return timer->minute(); }
100 int hour() const { return timer->hour(); }
101
102signals:
103 void timeChanged();
104
105private:
106 QTime t;
107 static MinuteTimer *timer;
108 static int instances;
109};
110
111#endif // TIMEMODEL_H
112

source code of qtdeclarative/examples/qml/qmlextensionplugins/timemodel.h