684761db46
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@22915 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
124 lines
4.0 KiB
TeX
124 lines
4.0 KiB
TeX
\section{\class{wxIdleEvent}}\label{wxidleevent}
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This class is used for idle events, which are generated when the system is idle.
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By default, idle events are sent to all windows. If this is causing a significant
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overhead in your application, you can call \helpref{wxIdleEvent::SetMode}{wxidleeventsetmode} with
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the value wxIDLE\_PROCESS\_SPECIFIED, and set the wxWS\_EX\_PROCESS\_IDLE extra
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window style for every window which should receive idle events.
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The function \helpref{wxWindow::OnInternalIdle}{wxwindowoninternalidle} is
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also provided for internal purposes, and cannot be disabled. wxUpdateUIEvents
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are sent from OnInternalIdle.
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\wxheading{Derived from}
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\helpref{wxEvent}{wxevent}\\
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\helpref{wxObject}{wxobject}
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\wxheading{Include files}
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<wx/event.h>
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\wxheading{Event table macros}
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To process an idle event, use this event handler macro to direct input to a member
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function that takes a wxIdleEvent argument.
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\twocolwidtha{7cm}
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\begin{twocollist}\itemsep=0pt
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\twocolitem{{\bf EVT\_IDLE(func)}}{Process a wxEVT\_IDLE event.}
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\end{twocollist}%
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\wxheading{Remarks}
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Idle events can be caught by the wxApp class, or by top-level window classes.
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\wxheading{See also}
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\helpref{Event handling overview}{eventhandlingoverview}, \helpref{wxUpdateUIEvent}{wxupdateuievent},
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\helpref{wxWindow::OnInternalIdle}{wxwindowoninternalidle}
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxIdleEvent::wxIdleEvent}
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\func{}{wxIdleEvent}{\void}
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Constructor.
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\membersection{wxIdleEvent::CanSend}\label{wxidleeventcansend}
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\func{static bool}{CanSend}{\param{wxWindow*}{ window}}
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Returns {\tt true} if it is appropriate to send idle events to
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this window.
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This function looks at the mode used (see \helpref{wxIdleEvent::SetMode}{wxidleeventsetmode}),
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and the wxWS\_EX\_PROCESS\_IDLE style in {\it window} to determine whether idle events should be sent to
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this window now. By default this will always return {\tt true} because
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the update mode is initially wxIDLE\_PROCESS\_ALL. You can change the mode
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to only send idle events to windows with the wxWS\_EX\_PROCESS\_IDLE extra window style set.
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\wxheading{See also}
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\helpref{wxIdleEvent::SetMode}{wxidleeventsetmode}
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\membersection{wxIdleEvent::GetMode}\label{wxidleeventgetmode}
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\func{static wxIdleMode}{GetMode}{\void}
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Static function returning a value specifying how wxWindows
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will send idle events: to all windows, or only to those which specify that they
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will process the events.
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See \helpref{wxIdleEvent::SetMode}{wxidleeventsetmode}.
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\membersection{wxIdleEvent::RequestMore}\label{wxidleeventrequestmore}
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\func{void}{RequestMore}{\param{bool}{ needMore = true}}
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Tells wxWindows that more processing is required. This function can be called by an OnIdle
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handler for a window or window event handler to indicate that wxApp::OnIdle should
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forward the OnIdle event once more to the application windows. If no window calls this function
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during OnIdle, then the application will remain in a passive event loop (not calling OnIdle) until a
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new event is posted to the application by the windowing system.
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\wxheading{See also}
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\helpref{wxIdleEvent::MoreRequested}{wxidleeventmorerequested}
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\membersection{wxIdleEvent::MoreRequested}\label{wxidleeventmorerequested}
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\constfunc{bool}{MoreRequested}{\void}
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Returns true if the OnIdle function processing this event requested more processing time.
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\wxheading{See also}
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\helpref{wxIdleEvent::RequestMore}{wxidleeventrequestmore}
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\membersection{wxIdleEvent::SetMode}\label{wxidleeventsetmode}
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\func{static void}{SetMode}{\param{wxIdleMode }{mode}}
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Static function for specifying how wxWindows will send idle events: to
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all windows, or only to those which specify that they
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will process the events.
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{\it mode} can be one of the following values.
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The default is wxIDLE\_PROCESS\_ALL.
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\begin{verbatim}
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enum wxIdleMode
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{
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// Send idle events to all windows
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wxIDLE_PROCESS_ALL,
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// Send idle events to windows that have
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// the wxWS_EX_PROCESS_IDLE flag specified
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wxIDLE_PROCESS_SPECIFIED
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};
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\end{verbatim}
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