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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
104If the timer was already running, it will be stopped by this method before
105restarting it.
106
107\membersection{wxTimer::Stop}\label{wxtimerstop}
108
109\func{void}{Stop}{\void}
110
111Stops the timer.
112
113\section{\class{wxTimerEvent}}\label{wxtimerevent}
114
115wxTimerEvent object is passed to the event handler of timer events.
116
117For example:
118
119\begin{verbatim}
120class MyFrame : public wxFrame
121{
122public:
123 ...
124 void OnTimer(wxTimerEvent& event);
125
126private:
127 wxTimer m_timer;
128};
129
130BEGIN_EVENT_TABLE(MyFrame, wxFrame)
131 EVT_TIMER(TIMER_ID, MyFrame::OnTimer)
132END_EVENT_TABLE()
133
134MyFrame::MyFrame()
135 : m_timer(this, TIMER_ID)
136{
137 m_timer.Start(1000); // 1 second interval
138}
139
140void MyFrame::OnTimer(wxTimerEvent& event)
141{
142 // do whatever you want to do every second here
143}
144
145\end{verbatim}
146
147\wxheading{Include files}
148
149<wx/timer.h>
150
151\wxheading{See also}
152
153\helpref{wxTimer}{wxtimer}
154
155\latexignore{\rtfignore{\wxheading{Members}}}
156
157\membersection{wxTimerEvent::GetInterval}\label{wxtimereventgetinterval}
158
159\constfunc{int}{GetInterval}{\void}
160
161Returns the interval of the timer which generated this event.
162