QBasicTimer

The QBasicTimer class provides timer events for objects. More…

Synopsis

Functions

• def isActive ()

• def start (msec, obj)

• def start (msec, timerType, obj)

• def stop ()

• def swap (other)

• def timerId ()

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

QTimer QTimerEvent timerEvent() Timers Wiggly Example

class PySide2.QtCore.QBasicTimer

PySide2.QtCore.QBasicTimer(arg__1)

Note

This constructor is deprecated.

param arg__1:

PySide2.QtCore.QBasicTimer

Constructs a basic timer.

See also

start()

PySide2.QtCore.QBasicTimer.isActive()

Return type:

bool

Returns true if the timer is running and has not been stopped; otherwise returns false .

See also

start() stop()

PySide2.QtCore.QBasicTimer.start(msec, obj)

Parameters:

• msec – int

• obj – PySide2.QtCore.QObject

Starts (or restarts) the timer with a msec milliseconds timeout. The timer will be a CoarseTimer . See TimerType for information on the different timer types.

The given object will receive timer events.

See also

stop() isActive() timerEvent() CoarseTimer

PySide2.QtCore.QBasicTimer.start(msec, timerType, obj)

Parameters:

• msec – int

• timerType – TimerType

• obj – PySide2.QtCore.QObject

This is an overloaded function.

Starts (or restarts) the timer with a msec milliseconds timeout and the given timerType . See TimerType for information on the different timer types.

obj will receive timer events.

See also

stop() isActive() timerEvent() TimerType

PySide2.QtCore.QBasicTimer.stop()

Stops the timer.

See also

start() isActive()

PySide2.QtCore.QBasicTimer.swap(other)

Parameters:

other – PySide2.QtCore.QBasicTimer

PySide2.QtCore.QBasicTimer.timerId()

Return type:

int

Returns the timer’s ID.

See also

timerId()