QBasicTimer Class▲
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Header: QBasicTimer
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CMake:
find_package(Qt6 REQUIRED COMPONENTS Core)
target_link_libraries(mytarget PRIVATE Qt6::Core)
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qmake: QT += core
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Group: QBasicTimer is part of Event Classes
Detailed Description▲
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▲
See also QTimer, QTimerEvent, QObject::timerEvent(), Timers, Wiggly Example
Member Function Documentation▲
[since 5.14] void QBasicTimer::swap(QBasicTimer &other)▲
Swaps string other with this string, or lhs with rhs. This operation is very fast and never fails.
This function was introduced in Qt 5.14.
[constexpr] QBasicTimer::QBasicTimer()▲
[since 5.14] QBasicTimer::QBasicTimer(QBasicTimer &&other)▲
Move-constructs a basic timer from other, which is left inactive.
This function was introduced in Qt 5.14.
See Also▲
QBasicTimer::~QBasicTimer()▲
Destroys the basic timer.
bool QBasicTimer::isActive() const▲
Returns true if the timer is running and has not been stopped; otherwise returns false.
See Also▲
void QBasicTimer::start(int msec, QObject *object)▲
Starts (or restarts) the timer with a msec milliseconds timeout. The timer will be a Qt::CoarseTimer. See Qt::TimerType for information on the different timer types.
The given object will receive timer events.
See Also▲
See also stop(), isActive(), QObject::timerEvent(), Qt::CoarseTimer
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▲
See also stop(), isActive(), QObject::timerEvent(), Qt::TimerType