X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/da36f5446f10eace61869a3e42672667f344e63b..50c538600e7586c256fe0145ac8054f045be6fbb:/docs/latex/wx/closeevt.tex diff --git a/docs/latex/wx/closeevt.tex b/docs/latex/wx/closeevt.tex index 58bf4391f0..4a70a1707d 100644 --- a/docs/latex/wx/closeevt.tex +++ b/docs/latex/wx/closeevt.tex @@ -2,10 +2,28 @@ This event class contains information about window and session close events. +The handler function for EVT\_CLOSE is called when the user has tried to close a a frame +or dialog box using the window manager (X) or system menu (Windows). It can +also be invoked by the application itself programmatically, for example by +calling the \helpref{wxWindow::Close}{wxwindowclose} function. + +You should check whether the application is forcing the deletion of the window +using \helpref{wxCloseEvent::CanVeto}{wxcloseeventcanveto}. If this is {\tt false}, +you {\it must} destroy the window using \helpref{wxWindow::Destroy}{wxwindowdestroy}. +If the return value is true, it is up to you whether you respond by destroying the window. + +If you don't destroy the window, you should call \helpref{wxCloseEvent::Veto}{wxcloseeventveto} to +let the calling code know that you did not destroy the window. This allows the \helpref{wxWindow::Close}{wxwindowclose} function +to return {\tt true} or {\tt false} depending on whether the close instruction was honoured or not. + \wxheading{Derived from} \helpref{wxEvent}{wxevent} +\wxheading{Include files} + + + \wxheading{Event table macros} To process a close event, use these event handler macros to direct input to member @@ -17,16 +35,16 @@ functions that take a wxCloseEvent argument. event applies to wxFrame and wxDialog classes.} \twocolitem{{\bf EVT\_QUERY\_END\_SESSION(func)}}{Process a query end session event, supplying the member function. This event applies to wxApp only.} -\twocolitem{{\bf EVT\__END\_SESSION(func)}}{Process an end session event, supplying the member function. +\twocolitem{{\bf EVT\_END\_SESSION(func)}}{Process an end session event, supplying the member function. This event applies to wxApp only.} \end{twocollist}% \wxheading{See also} -\helpref{wxWindow::OnCloseWindow}{wxwindowonclosewindow},\rtfsp \helpref{wxWindow::Close}{wxwindowclose},\rtfsp \helpref{wxApp::OnQueryEndSession}{wxapponqueryendsession},\rtfsp -\helpref{wxApp::OnEndSession}{wxapponendsession},\rtfsp +%% GD: OnXXX functions are not documented +%%\helpref{wxApp::OnEndSession}{wxapponendsession},\rtfsp \helpref{Window deletion overview}{windowdeletionoverview} \latexignore{\rtfignore{\wxheading{Members}}} @@ -41,7 +59,7 @@ Constructor. \func{bool}{CanVeto}{\void} -Returns TRUE if you can veto a system shutdown or a window close event. +Returns true if you can veto a system shutdown or a window close event. Vetoing a window close event is not possible if the calling code wishes to force the application to exit, and so this function must be called to check this. @@ -49,19 +67,19 @@ force the application to exit, and so this function must be called to check this \constfunc{bool}{GetLoggingOff}{\void} -Returns TRUE if the user is logging off. +Returns true if the user is logging off. \membersection{wxCloseEvent::GetSessionEnding}\label{wxcloseeventgetsessionending} \constfunc{bool}{GetSessionEnding}{\void} -Returns TRUE if the session is ending. +Returns true if the session is ending. \membersection{wxCloseEvent::GetForce}\label{wxcloseeventgetforce} \constfunc{bool}{GetForce}{\void} -Returns TRUE if the application wishes to force the window to close. +Returns true if the application wishes to force the window to close. This will shortly be obsolete, replaced by CanVeto. \membersection{wxCloseEvent::SetCanVeto}\label{wxcloseeventsetcanveto} @@ -84,12 +102,12 @@ Sets the 'logging off' flag. \membersection{wxCloseEvent::Veto}\label{wxcloseeventveto} -\func{void}{Veto}{\param{bool}{ veto = TRUE}} +\func{void}{Veto}{\param{bool}{ veto = true}} Call this from your event handler to veto a system shutdown or to signal to the calling application that a window close did not happen. You can only veto a shutdown if \helpref{wxCloseEvent::CanVeto}{wxcloseeventcanveto} returns -TRUE. +true.