# wx.Timer¶

The wx.Timer class allows you to execute code at specified intervals.

Its precision is platform-dependent, but in general will not be better than 1ms nor worse than 1s .

There are three different ways to use this class:

• You may derive a new class from wx.Timer and override the wx.Timer.Notify member to perform the required action.

• You may redirect the notifications to any wx.EvtHandler derived object by using the non-default constructor or wx.Timer.SetOwner . Then use the EVT_TIMER macro to connect it to the event handler which will receive wx.TimerEvent notifications.

• You may use a derived class and the EVT_TIMER macro to connect it to an event handler defined in the derived class. If the default constructor is used, the timer object will be its own owner object, since it is derived from wx.EvtHandler.

In any case, you must start the timer with wx.Timer.Start after constructing it before it actually starts sending notifications. It can be stopped later with wx.Timer.Stop .

Note

A timer can only be used from the main thread.

wx.StopWatch

## Class Hierarchy¶

Inheritance diagram for class Timer:

## Methods Summary¶

 __init__ Default constructor. GetId Returns the ID of the events generated by this timer. GetInterval Returns the current interval for the timer (in milliseconds). GetOwner Returns the current owner of the timer. IsOneShot Returns True if the timer is one shot, i.e. if it will stop after firing the first notification automatically. IsRunning Returns True if the timer is running, False if it is stopped. Notify This member should be overridden by the user if the default constructor was used and SetOwner wasn’t called. SetOwner Associates the timer with the given owner object. Start (Re)starts the timer. StartOnce Starts the timer for a once-only notification. Stop Stops the timer.

## Class API¶

class wx.Timer(EvtHandler)

Possible constructors:

Timer()

Timer(owner, id=-1)


The Timer class allows you to execute code at specified intervals.

### Methods¶

__init__(self, *args, **kw)

__init__ (self)

Default constructor.

If you use it to construct the object and don’t call SetOwner later, you must override Notify method to process the notifications.

__init__ (self, owner, id=-1)

Creates a timer and associates it with owner.

Please see SetOwner for the description of parameters.

Parameters

GetId(self)

Returns the ID of the events generated by this timer.

Return type

int

GetInterval(self)

Returns the current interval for the timer (in milliseconds).

Return type

int

GetOwner(self)

Returns the current owner of the timer.

If not None this is the event handler which will receive the timer events (see wx.TimerEvent) when the timer is running.

Return type

wx.EvtHandler

IsOneShot(self)

Returns True if the timer is one shot, i.e. if it will stop after firing the first notification automatically.

Return type

bool

IsRunning(self)

Returns True if the timer is running, False if it is stopped.

Return type

bool

Notify(self)

This member should be overridden by the user if the default constructor was used and SetOwner wasn’t called.

Perform whatever action which is to be taken periodically here.

Notice that throwing exceptions from this method is currently not supported, use event-based timer handling approach if an exception can be thrown while handling timer notifications.

SetOwner(self, owner, id=-1)

Associates the timer with the given owner object.

When the timer is running, the owner will receive timer events (see wx.TimerEvent) with id equal to id specified here.

Parameters

Start(self, milliseconds=-1, oneShot=TIMER_CONTINUOUS)

(Re)starts the timer.

If milliseconds parameter is -1 (value by default), the previous value is used. Returns False if the timer could not be started, True otherwise (in MS Windows timers are a limited resource).

If oneShot is False (the default), the Notify function will be called repeatedly until the timer is stopped. If True, it will be called only once and the timer will stop automatically.

To make your code more readable you may also use the following symbolic constants:

• wx.TIMER_CONTINUOUS: Start a normal, continuously running, timer

• wx.TIMER_ONE_SHOT: Start a one shot timer Alternatively, use StartOnce .

If the timer was already running, it will be stopped by this method before restarting it.

Parameters
• milliseconds (int) –

• oneShot (bool) –

Return type

bool

StartOnce(self, milliseconds=-1)

Starts the timer for a once-only notification.

This is a simple wrapper for Start with TIMER_ONE_SHOT parameter.

Parameters

milliseconds (int) –

Return type

bool

New in version 2.9.5.

Stop(self)

Stops the timer.

### Properties¶

Id

Interval

Owner