QBasicTimer Class
The QBasicTimer class provides timer events for objects. More...
| Header: | #include <QBasicTimer> |
| qmake: | QT += core |
Public Functions
Detailed Description
The QBasicTimer class provides timer events for objects.
This is a fast, lightweight, and low-level class used by Qt internally. We recommend using the higher-level QTimer class rather than this class if you want to use timers in your applications. Note that this timer is a repeating timer that will send subsequent timer events unless the stop() function is called.
To use this class, create a QBasicTimer, and call its start() function with a timeout interval and with a pointer to a QObject subclass. When the timer times out it will send a timer event to the QObject subclass. The timer can be stopped at any time using stop(). isActive() returns true for a timer that is running; i.e. it has been started, has not reached the timeout time, and has not been stopped. The timer's ID can be retrieved using timerId().
Objects of this class cannot be copied, but can be moved, so you can maintain a list of basic timers by holding them in container that supports move-only types, e.g. std::vector.
The Wiggly example uses QBasicTimer to repaint a widget at regular intervals.
See also QTimer, QTimerEvent, QObject::timerEvent(), Timers, and Wiggly Example.
Member Function Documentation
void QBasicTimer::start(int msec, Qt::TimerType timerType, QObject *obj)
This is an overloaded function.
Starts (or restarts) the timer with a msec milliseconds timeout and the given timerType. See Qt::TimerType for information on the different timer types.
obj will receive timer events.
See also stop(), isActive(), QObject::timerEvent(), and Qt::TimerType.
void QBasicTimer::stop()
Stops the timer.
See also start() and isActive().