X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b0a2d8a882a59d30d95a836b5897132de0262d91..c266eff98c5e44012647f54f38a1e29ecabd8759:/docs/latex/wx/timer.tex?ds=inline diff --git a/docs/latex/wx/timer.tex b/docs/latex/wx/timer.tex index 7830183b5d..f5d7b52f5f 100644 --- a/docs/latex/wx/timer.tex +++ b/docs/latex/wx/timer.tex @@ -4,33 +4,44 @@ The wxTimer 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 two different ways to use this class: +There are three different ways to use this class: \begin{enumerate} \item You may derive a new class from wxTimer and override the \helpref{Notify}{wxtimernotify} member to perform the required action. \item Or you may redirect the notifications to any -\helpref{wxEvtHandler}{wxevthandler} derived object by using the non default -constructor or \helpref{SetOwner}{wxtimersetowner}. Then use {\tt EVT\_TIMER} +\helpref{wxEvtHandler}{wxevthandler} derived object by using the non-default +constructor or \helpref{SetOwner}{wxtimersetowner}. Then use the {\tt EVT\_TIMER} macro to connect it to the event handler which will receive \helpref{wxTimerEvent}{wxtimerevent} notifications. +\item Or you may use a derived class and the {\tt 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 wxEvtHandler. \end{enumerate} In any case, you must start the timer with \helpref{Start}{wxtimerstart} after constructing it before it actually starts sending notifications. It can be stopped later with \helpref{Stop}{wxtimerstop}. +{\bf Note:} A timer can only be used from the main thread. + \wxheading{Derived from} +\helpref{wxEvtHandler}{wxevthandler} \helpref{wxObject}{wxobject} \wxheading{Include files} +\wxheading{Library} + +\helpref{wxBase}{librarieslist} + \wxheading{See also} -\helpref{::wxStartTimer}{wxstarttimer}, \helpref{::wxGetElapsedTime}{wxgetelapsedtime}, \helpref{wxStopWatch}{wxstopwatch} +\helpref{wxStopWatch}{wxstopwatch} \latexignore{\rtfignore{\wxheading{Members}}} @@ -47,30 +58,44 @@ Default constructor. If you use it to construct the object and don't call Creates a timer and associates it with {\it owner}. Please see \helpref{SetOwner}{wxtimersetowner} for the description of parameters. -\membersection{wxTimer::\destruct{wxTimer}} +\membersection{wxTimer::\destruct{wxTimer}}\label{wxtimerdtor} \func{}{\destruct{wxTimer}}{\void} Destructor. Stops the timer if it is running. -\membersection{wxTimer::GetInterval}{wxtimergetinterval} +\membersection{wxTimer::GetInterval}\label{wxtimergetinterval} \constfunc{int}{GetInterval}{\void} Returns the current interval for the timer (in milliseconds). +\membersection{wxTimer::GetOwner}\label{wxtimergetowner} + +\constfunc{wxEvtHandler}{GetOwner}{\void} + +Returns the current {\it owner} of the timer. +If non-\NULL this is the event handler which will receive the +\helpref{timer events}{wxtimerevent} when the timer is running. + +\membersection{wxTimer::GetId}\label{wxtimergetid} + +\constfunc{int}{GetId}{\void} + +Returns the ID of the events generated by this timer. + \membersection{wxTimer::IsOneShot}\label{wxtimerisoneshot} \constfunc{bool}{IsOneShot}{\void} -Returns {\tt TRUE} if the timer is one shot, i.e.\ if it will stop after firing the +Returns {\tt true} if the timer is one shot, i.e.\ if it will stop after firing the first notification automatically. \membersection{wxTimer::IsRunning}\label{wxtimerisrunning} \constfunc{bool}{IsRunning}{\void} -Returns {\tt TRUE} if the timer is running, {\tt FALSE} if it is stopped. +Returns {\tt true} if the timer is running, {\tt false} if it is stopped. \membersection{wxTimer::Notify}\label{wxtimernotify} @@ -91,23 +116,23 @@ id equal to {\it id}\/ specified here. \membersection{wxTimer::Start}\label{wxtimerstart} -\func{bool}{Start}{\param{int}{milliseconds = -1}, \param{bool }{oneShot = {\tt FALSE}}} +\func{bool}{Start}{\param{int }{milliseconds = -1}, \param{bool }{oneShot = {\tt false}}} (Re)starts the timer. If {\it milliseconds}\/ parameter is -1 (value by default), -the previous value is used. Returns {\tt FALSE} if the timer could not be started, -{\tt TRUE} otherwise (in MS Windows timers are a limited resource). +the previous value is used. Returns {\tt false} if the timer could not be started, +{\tt true} otherwise (in MS Windows timers are a limited resource). -If {\it oneShot}\/ is {\tt FALSE} (the default), the \helpref{Notify}{wxtimernotify} -function will be called repeatedly until the timer is stopped. If {\tt TRUE}, +If {\it oneShot}\/ is {\tt false} (the default), the \helpref{Notify}{wxtimernotify} +function will be called repeatedly until the timer is stopped. If {\tt 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 -\twocolwidtha{5cm}% +code more readable you may also use the following symbolic constants: + +\twocolwidtha{5cm} \begin{twocollist}\itemsep=0pt \twocolitem{wxTIMER\_CONTINUOUS}{Start a normal, continuously running, timer} \twocolitem{wxTIMER\_ONE\_SHOT}{Start a one shot timer} \end{twocollist} - If the timer was already running, it will be stopped by this method before restarting it. @@ -117,6 +142,13 @@ restarting it. Stops the timer. + + + + +%% wxTimerEvent + + \section{\class{wxTimerEvent}}\label{wxtimerevent} wxTimerEvent object is passed to the event handler of timer events. @@ -151,10 +183,19 @@ void MyFrame::OnTimer(wxTimerEvent& event) \end{verbatim} +\wxheading{Derived from} + +\helpref{wxEvent}{wxevent}\\ +\helpref{wxObject}{wxobject} + \wxheading{Include files} +\wxheading{Library} + +\helpref{wxBase}{librarieslist} + \wxheading{See also} \helpref{wxTimer}{wxtimer} @@ -167,3 +208,10 @@ void MyFrame::OnTimer(wxTimerEvent& event) Returns the interval of the timer which generated this event. + +\membersection{wxTimerEvent::GetTimer}\label{wxtimereventgettimer} + +\constfunc{wxTimer\&}{GetTimer}{\void} + +Returns the timer object which generated this event. +