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1\section{\class{wxTimer}}\label{wxtimer}
2
3The wxTimer class allows you to execute code at specified intervals. Its
4precision is platform-dependent, but in general will not be better than 1ms nor
5worse than 1s.
6
7There are two different ways to use this class:
8
9\begin{enumerate}
10\item You may derive a new class from wxTimer and override the
11\helpref{Notify}{wxtimernotify} member to perform the required action.
12\item Or you may redirect the notifications to any
13\helpref{wxEvtHandler}{wxevthandler} derived object by using the non default
14constructor or \helpref{SetOwner}{wxtimersetowner}. Then use {\tt EVT\_TIMER}
15macro to connect it to the event handler which will receive
16\helpref{wxTimerEvent}{wxtimerevent} notifications.
17\end{enumerate}
18
19In any case, you must start the timer with \helpref{Start}{wxtimerstart}
20after constructing it before it actually starts sending notifications. It can
21be stopped later with \helpref{Stop}{wxtimerstop}.
22
23\wxheading{Derived from}
24
25\helpref{wxObject}{wxobject}
26
27\wxheading{Include files}
28
29<wx/timer.h>
30
31\wxheading{See also}
32
33\helpref{::wxStartTimer}{wxstarttimer}, \helpref{::wxGetElapsedTime}{wxgetelapsedtime}, \helpref{wxStopWatch}{wxstopwatch}
34
35\latexignore{\rtfignore{\wxheading{Members}}}
36
37\membersection{wxTimer::wxTimer}\label{wxtimerwxtimer}
38
39\func{}{wxTimer}{\void}
40
41Default constructor. If you use it to construct the object and don't call
42\helpref{SetOwner}{wxtimersetowner} later, you must override
43\helpref{Notify}{wxtimernotify} method to process the notifications.
44
45\func{}{wxTimer}{\param{wxEvtHandler *}{owner}, \param{int }{id = -1}}
46
47Creates a timer and associates it with {\it owner}. Please see
48\helpref{SetOwner}{wxtimersetowner} for the description of parameters.
49
50\membersection{wxTimer::\destruct{wxTimer}}
51
52\func{}{\destruct{wxTimer}}{\void}
53
54Destructor. Stops the timer if it is running.
55
56\membersection{wxTimer::GetInterval}{wxtimergetinterval}
57
58\constfunc{int}{GetInterval}{\void}
59
60Returns the current interval for the timer (in milliseconds).
61
62\membersection{wxTimer::IsOneShot}\label{wxtimerisoneshot}
63
64\constfunc{bool}{IsOneShot}{\void}
65
66Returns TRUE if the timer is one shot, i.e. if it will stop after firing the
67first notification automatically.
68
69\membersection{wxTimer::IsRunning}\label{wxtimerisrunning}
70
71\constfunc{bool}{IsRunning}{\void}
72
73Returns TRUE if the timer is running, FALSE if it is stopped.
74
75\membersection{wxTimer::Notify}\label{wxtimernotify}
76
77\func{void}{Notify}{\void}
78
79This member should be overridden by the user if the default constructor was
80used and \helpref{SetOwner}{wxtimersetowner} wasn't called.
81
82Perform whatever action which is to be taken periodically here.
83
84\membersection{wxTimer::SetOwner}\label{wxtimersetowner}
85
86\func{void}{SetOwner}{\param{wxEvtHandler *}{owner}, \param{int }{id = -1}}
87
88Associates the timer with the given {\it owner} object. When the timer is
89running, the owner will receive \helpref{timer events}{wxtimerevent} with
90id equal to {\it id} specified here.
91
92\membersection{wxTimer::Start}\label{wxtimerstart}
93
94\func{bool}{Start}{\param{int}{ milliseconds = -1}, \param{bool}{ oneShot=FALSE}}
95
96(Re)starts the timer. If {\it milliseconds} parameter is -1 (value by default),
97the previous value is used. Returns FALSE if the timer could not be started,
98TRUE otherwise (in MS Windows timers are a limited resource).
99
100If {\it oneShot} is FALSE (the default), the \helpref{Notify}{wxtimernotify}
101function will be called repeatedly until the timer is stopped. If TRUE,
102it will be called only once and the timer will stop automatically.
103
104\membersection{wxTimer::Stop}\label{wxtimerstop}
105
106\func{void}{Stop}{\void}
107
108Stops the timer.
109
110\section{\class{wxTimerEvent}}\label{wxtimerevent}
111
112wxTimerEvent object is passed to the event handler of timer events.
113
114For example:
115
116\begin{verbatim}
117class MyFrame : public wxFrame
118{
119public:
120 ...
121 void OnTimer(wxTimerEvent& event);
122
123private:
124 wxTimer m_timer;
125};
126
127BEGIN_EVENT_TABLE(MyFrame, wxFrame)
128 EVT_TIMER(TIMER_ID, MyFrame::OnTimer)
129END_EVENT_TABLE()
130
131MyFrame::MyFrame()
132 : m_timer(this, TIMER_ID)
133{
134 m_timer.Start(1000); // 1 second interval
135}
136
137void MyFrame::OnTimer(wxTimerEvent& event)
138{
139 // do whatever you want to do every second here
140}
141
142\end{verbatim}
143
144\wxheading{Include files}
145
146<wx/timer.h>
147
148\wxheading{See also}
149
150\helpref{wxTimer}{wxtimer}
151
152\latexignore{\rtfignore{\wxheading{Members}}}
153
154\membersection{wxTimerEvent::GetInterval}\label{wxtimereventgetinterval}
155
156\constfunc{int}{GetInterval}{\void}
157
158Returns the interval of the timer which generated this event.
159