X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/4d5a0f67c6f127ad08548494cdddc5c89bb27194..9379c0d752144826342fa2688a77aa5cccea3d9b:/docs/latex/wx/closeevt.tex diff --git a/docs/latex/wx/closeevt.tex b/docs/latex/wx/closeevt.tex index 611c752b79..abb81d7e87 100644 --- a/docs/latex/wx/closeevt.tex +++ b/docs/latex/wx/closeevt.tex @@ -2,6 +2,20 @@ 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} @@ -27,47 +41,38 @@ This event applies to wxApp only.} \wxheading{See also} -\helpref{wxWindow::OnCloseWindow}{wxwindowonclosewindow},\rtfsp \helpref{wxWindow::Close}{wxwindowclose},\rtfsp -\helpref{wxApp::OnQueryEndSession}{wxapponqueryendsession},\rtfsp %% GD: OnXXX functions are not documented %%\helpref{wxApp::OnEndSession}{wxapponendsession},\rtfsp \helpref{Window deletion overview}{windowdeletionoverview} \latexignore{\rtfignore{\wxheading{Members}}} -\membersection{wxCloseEvent::wxCloseEvent} + +\membersection{wxCloseEvent::wxCloseEvent}\label{wxcloseeventctor} \func{}{wxCloseEvent}{\param{WXTYPE}{ commandEventType = 0}, \param{int}{ id = 0}} Constructor. + \membersection{wxCloseEvent::CanVeto}\label{wxcloseeventcanveto} \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. + \membersection{wxCloseEvent::GetLoggingOff}\label{wxcloseeventgetloggingoff} \constfunc{bool}{GetLoggingOff}{\void} -Returns TRUE if the user is logging off. - -\membersection{wxCloseEvent::GetSessionEnding}\label{wxcloseeventgetsessionending} +Returns true if the user is just logging off or false if the system is +shutting down. This method can only be called for end session and query end +session events, it doesn't make sense for close window event. -\constfunc{bool}{GetSessionEnding}{\void} - -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. -This will shortly be obsolete, replaced by CanVeto. \membersection{wxCloseEvent::SetCanVeto}\label{wxcloseeventsetcanveto} @@ -75,26 +80,29 @@ This will shortly be obsolete, replaced by CanVeto. Sets the 'can veto' flag. + \membersection{wxCloseEvent::SetForce}\label{wxcloseeventsetforce} \constfunc{void}{SetForce}{\param{bool}{ force}} Sets the 'force' flag. + \membersection{wxCloseEvent::SetLoggingOff}\label{wxcloseeventsetloggingoff} \constfunc{void}{SetLoggingOff}{\param{bool}{ loggingOff}} 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.