Constructor. Called implicitly with a definition of a wxApp object.
-The argument is a language identifier; this is an experimental
-feature and will be expanded and documented in future versions.
-
\membersection{wxApp::\destruct{wxApp}}
\func{void}{\destruct{wxApp}}{\void}
\membersection{wxApp::GetTopWindow}\label{wxappgettopwindow}
-\constfunc{wxWindow *}{GetTopWindow}{\void}
+\constfunc{virtual wxWindow *}{GetTopWindow}{\void}
Returns a pointer to the top window.
Returns 0 under X, and the wParam of the WM\_QUIT message under Windows.
-\membersection{wxApp::OnActivate}\label{wxapponactivate}
+%% VZ: OnXXX() functions should *not* be documented
+%%
+%%\membersection{wxApp::OnActivate}\label{wxapponactivate}
+%%
+%%\func{void}{OnActivate}{\param{wxActivateEvent\& }{event}}
+%%
+%%Provide this member function to know whether the application is being
+%%activated or deactivated (Windows only).
+%%
+%%\wxheading{See also}
+%%
+%%\helpref{wxWindow::OnActivate}{wxwindowonactivate}, \helpref{wxActivateEvent}{wxactivateevent}
+%%
+%%\membersection{wxApp::OnCharHook}\label{wxapponcharhook}
+%%
+%%\func{void}{OnCharHook}{\param{wxKeyEvent\&}{ event}}
+%%
+%%This event handler function is called (under Windows only) to allow the window to intercept keyboard events
+%%before they are processed by child windows.
+%%
+%%\wxheading{Parameters}
+%%
+%%\docparam{event}{The keypress event.}
+%%
+%%\wxheading{Remarks}
+%%
+%%Use the wxEVT\_CHAR\_HOOK macro in your event table.
+%%
+%%If you use this member, you can selectively consume keypress events by calling\rtfsp
+%%\helpref{wxEvent::Skip}{wxeventskip} for characters the application is not interested in.
+%%
+%%\wxheading{See also}
+%%
+%%\helpref{wxKeyEvent}{wxkeyevent}, \helpref{wxWindow::OnChar}{wxwindowonchar},\rtfsp
+%%\helpref{wxWindow::OnCharHook}{wxwindowoncharhook}, \helpref{wxDialog::OnCharHook}{wxdialogoncharhook}
+
+\membersection{wxApp::OnAssert}\label{wxapponassert}
+
+\func{void}{OnAssert}{\param{const wxChar }{*file}, \param{int }{line}, \param{const wxChar }{*msg}}
+
+This function is called when an assert failure occurs, i.e. the condition
+specified in \helpref{wxASSERT}{wxassert} macro evaluated to {\tt FALSE}.
+It is only called in debug mode (when {\tt \_\_WXDEBUG\_\_} is defined) as
+asserts are not left in the release code at all.
+
+The base class version show the default assert failure dialog box proposing to
+the user to stop the program, continue or ignore all subsequent asserts.
-\func{void}{OnActivate}{\param{wxActivateEvent\& }{event}}
+\wxheading{Parameters}
-Provide this member function to know whether the application is being
-activated or deactivated (Windows only).
+\docparam{file}{the name of the source file where the assert occured}
-\wxheading{See also}
+\docparam{line}{the line number in this file where the assert occured}
-\helpref{wxWindow::OnActivate}{wxwindowonactivate}, \helpref{wxActivateEvent}{wxactivateevent}
+\docparam{msg}{the message specified as argument to
+\helpref{wxASSERT\_MSG}{wxassertmsg} or \helpref{wxFAIL\_MSG}{wxfailmsg}, will
+be {\tt NULL} if just \helpref{wxASSERT}{wxassert} or \helpref{wxFAIL}{wxfail}
+was used}
\membersection{wxApp::OnExit}\label{wxapponexit}
Provide this member function for any processing which needs to be done as
the application is about to exit.
-\membersection{wxApp::OnCharHook}\label{wxapponcharhook}
+\membersection{wxApp::OnCmdLineError}\label{wxapponcmdlineerror}
-\func{void}{OnCharHook}{\param{wxKeyEvent\&}{ event}}
+\func{bool}{OnCmdLineError}{\param{wxCmdLineParser\& }{parser}}
-This event handler function is called (under Windows only) to allow the window to intercept keyboard events
-before they are processed by child windows.
+Called when command line parsing fails (i.e. an incorrect command line option
+was specified by the user). The default behaviour is to show the program usage
+text and abort the program.
-\wxheading{Parameters}
+Return {\tt TRUE} to continue normal execution or {\tt FALSE} to return
+{\tt FALSE} from \helpref{OnInit}{wxapponinit} thus terminating the program.
-\docparam{event}{The keypress event.}
+\wxheading{See also}
-\wxheading{Remarks}
+\helpref{OnInitCmdLine}{wxapponinitcmdline}
-Use the wxEVT\_CHAR\_HOOK macro in your event table.
+\membersection{wxApp::OnCmdLineHelp}\label{wxapponcmdlinehelp}
-If you use this member, you can selectively consume keypress events by calling\rtfsp
-\helpref{wxEvent::Skip}{wxeventskip} for characters the application is not interested in.
+\func{bool}{OnCmdLineHelp}{\param{wxCmdLineParser\& }{parser}}
-\wxheading{See also}
+Called when the help option ({\tt --help}) was specified on the command line.
+The default behaviour is to show the program usage text and abort the program.
-\helpref{wxKeyEvent}{wxkeyevent}, \helpref{wxWindow::OnChar}{wxwindowonchar},\rtfsp
-\helpref{wxWindow::OnCharHook}{wxwindowoncharhook}, \helpref{wxDialog::OnCharHook}{wxdialogoncharhook}
+Return {\tt TRUE} to continue normal execution or {\tt FALSE} to return
+{\tt FALSE} from \helpref{OnInit}{wxapponinit} thus terminating the program.
-\membersection{wxApp::OnIdle}\label{wxapponidle}
-
-\func{void}{OnIdle}{\param{wxIdleEvent\& }{event}}
+\wxheading{See also}
-Override this member function for any processing which needs to be done
-when the application is idle. You should call wxApp::OnIdle from your own function,
-since this forwards OnIdle events to windows and also performs garbage collection for
-windows whose destruction has been delayed.
+\helpref{OnInitCmdLine}{wxapponinitcmdline}
-wxWindows' strategy for OnIdle processing is as follows. After pending user interface events for an
-application have all been processed, wxWindows sends an OnIdle event to the application object. wxApp::OnIdle itself
-sends an OnIdle event to each application window, allowing windows to do idle processing such as updating
-their appearance. If either wxApp::OnIdle or a window OnIdle function requested more time, by
-caling \helpref{wxIdleEvent::ReqestMore}{wxidleeventrequestmore}, wxWindows will send another OnIdle
-event to the application object. This will occur in a loop until either a user event is found to be
-pending, or OnIdle requests no more time. Then all pending user events are processed until the system
-goes idle again, when OnIdle is called, and so on.
+\membersection{wxApp::OnCmdLineParsed}\label{wxapponcmdlineparsed}
-\wxheading{See also}
+\func{bool}{OnCmdLineParsed}{\param{wxCmdLineParser\& }{parser}}
-\helpref{wxWindow::OnIdle}{wxwindowonidle}, \helpref{wxIdleEvent}{wxidleevent},\rtfsp
-\helpref{wxWindow::SendIdleEvents}{wxappsendidleevents}
+Called after the command line had been successfully parsed. You may override
+this method to test for the values of the various parameters which could be
+set from the command line.
-\membersection{wxApp::OnEndSession}\label{wxapponendsession}
+Don't forget to call the base class version unless you want to suppress
+processing of the standard command line options.
-\func{void}{OnEndSession}{\param{wxCloseEvent\& }{event}}
+Return {\tt TRUE} to continue normal execution or {\tt FALSE} to return
+{\tt FALSE} from \helpref{OnInit}{wxapponinit} thus terminating the program.
-This is an event handler function called when the operating system or GUI session is
-about to close down. The application has a chance to silently save information,
-and can optionally close itself.
+\wxheading{See also}
-Use the EVT\_END\_SESSION event table macro to handle query end session events.
+\helpref{OnInitCmdLine}{wxapponinitcmdline}
-The default handler calls \helpref{wxWindow::Close}{wxwindowclose} with a TRUE argument
-(forcing the application to close itself silently).
+\membersection{wxApp::OnFatalException}\label{wxapponfatalexception}
-\wxheading{Remarks}
+\func{void}{OnFatalException}{\void}
-Under X, OnEndSession is called in response to the `die' event.
+This function may be called if something fatal happens: an unhandled
+exception under Win32 or a a fatal signal under Unix, for example. However,
+this will not happen by default: you have to explicitly call
+\helpref{wxHandleFatalExceptions}{wxhandlefatalexceptions} to enable this.
-Under Windows, OnEndSession is called in response to the WM\_ENDSESSION message.
+Generally speaking, this function should only show a message to the user and
+return. You may attempt to save unsaved data but this is not guaranteed to
+work and, in fact, probably won't.
\wxheading{See also}
-\helpref{wxWindow::Close}{wxwindowclose},\rtfsp
-\helpref{wxWindow::OnCloseWindow}{wxwindowonclosewindow},\rtfsp
-\helpref{wxCloseEvent}{wxcloseevent},\rtfsp
-\helpref{wxApp::OnQueryEndSession}{wxapponqueryendsession}
+\helpref{wxHandleFatalExcetions}{wxhandlefatalexceptions}
+
+%% VZ: the wxApp event handler are private and should not be documented here!
+%%
+%%\membersection{wxApp::OnIdle}\label{wxapponidle}
+%%
+%%\func{void}{OnIdle}{\param{wxIdleEvent\& }{event}}
+%%
+%%Override this member function for any processing which needs to be done
+%%when the application is idle. You should call wxApp::OnIdle from your own function,
+%%since this forwards OnIdle events to windows and also performs garbage collection for
+%%windows whose destruction has been delayed.
+%%
+%%wxWindows' strategy for OnIdle processing is as follows. After pending user interface events for an
+%%application have all been processed, wxWindows sends an OnIdle event to the application object. wxApp::OnIdle itself
+%%sends an OnIdle event to each application window, allowing windows to do idle processing such as updating
+%%their appearance. If either wxApp::OnIdle or a window OnIdle function requested more time, by
+%%caling \helpref{wxIdleEvent::RequestMore}{wxidleeventrequestmore}, wxWindows will send another OnIdle
+%%event to the application object. This will occur in a loop until either a user event is found to be
+%%pending, or OnIdle requests no more time. Then all pending user events are processed until the system
+%%goes idle again, when OnIdle is called, and so on.
+%%
+%%\wxheading{See also}
+%%
+%%\helpref{wxWindow::OnIdle}{wxwindowonidle}, \helpref{wxIdleEvent}{wxidleevent},\rtfsp
+%%\helpref{wxWindow::SendIdleEvents}{wxappsendidleevents}
+%%
+%%\membersection{wxApp::OnEndSession}\label{wxapponendsession}
+%%
+%%\func{void}{OnEndSession}{\param{wxCloseEvent\& }{event}}
+%%
+%%This is an event handler function called when the operating system or GUI session is
+%%about to close down. The application has a chance to silently save information,
+%%and can optionally close itself.
+%%
+%%Use the EVT\_END\_SESSION event table macro to handle query end session events.
+%%
+%%The default handler calls \helpref{wxWindow::Close}{wxwindowclose} with a TRUE argument
+%%(forcing the application to close itself silently).
+%%
+%%\wxheading{Remarks}
+%%
+%%Under X, OnEndSession is called in response to the `die' event.
+%%
+%%Under Windows, OnEndSession is called in response to the WM\_ENDSESSION message.
+%%
+%%\wxheading{See also}
+%%
+%%\helpref{wxWindow::Close}{wxwindowclose},\rtfsp
+%%\helpref{wxWindow::OnCloseWindow}{wxwindowonclosewindow},\rtfsp
+%%\helpref{wxCloseEvent}{wxcloseevent},\rtfsp
+%%\helpref{wxApp::OnQueryEndSession}{wxapponqueryendsession}
\membersection{wxApp::OnInit}\label{wxapponinit}
\func{bool}{OnInit}{\void}
This must be provided by the application, and will usually create the
-application's main window, optionally calling \helpref{wxApp::SetTopWindow}{wxappsettopwindow}.
+application's main window, optionally calling
+\helpref{wxApp::SetTopWindow}{wxappsettopwindow}.
+
+Notice that if you want to to use the command line processing provided by
+wxWindows you have to call the base class version in the derived class
+OnInit().
Return TRUE to continue processing, FALSE to exit the application.
+\membersection{wxApp::OnInitCmdLine}\label{wxapponinitcmdline}
+
+\func{void}{OnInitCmdLine}{\param{wxCmdLineParser\& }{parser}}
+
+Called from \helpref{OnInit}{wxapponinit} and may be used to initialize the
+parser with the command line options for this application. The base class
+versions adds support for a few standard options only.
+
\membersection{wxApp::OnQueryEndSession}\label{wxapponqueryendsession}
\func{void}{OnQueryEndSession}{\param{wxCloseEvent\& }{event}}
\helpref{wxWindow::Close}{wxwindowclose},\rtfsp
\helpref{wxWindow::OnCloseWindow}{wxwindowonclosewindow},\rtfsp
-\helpref{wxCloseEvent}{wxcloseevent},\rtfsp
-\helpref{wxApp::OnEndSession}{wxapponendsession}
+\helpref{wxCloseEvent}{wxcloseevent}
+%% GD: OnXXX functions are not documented
+%%\helpref{wxApp::OnEndSession}{wxapponendsession}
\membersection{wxApp::ProcessMessage}\label{wxappprocessmessage}
\wxheading{See also}
-\helpref{wxApp::OnIdle}{wxapponidle}, \helpref{wxWindow::OnIdle}{wxwindowonidle}, \helpref{wxIdleEvent}{wxidleevent}
+%% GD: OnXXX functions are not documented
+%%\helpref{wxApp::OnIdle}{wxapponidle}
+\helpref{wxWindow::OnIdle}{wxwindowonidle},\rtfsp
+\helpref{wxIdleEvent}{wxidleevent}
\membersection{wxApp::SetAppName}\label{wxappsetappname}
Sets the `top' window. You can call this from within \helpref{wxApp::OnInit}{wxapponinit} to
let wxWindows know which is the main window. You don't have to set the top window;
-it's only a convenience so that (for example) certain dialogs without parents can use a
+it is only a convenience so that (for example) certain dialogs without parents can use a
specific window as the top window. If no top window is specified by the application,
wxWindows just uses the first frame or dialog in its top-level window list, when it
needs to use the top window.
\wxheading{Parameters}
-\docparam{which}{One of the wxICON\_XXX defines and chooses which icon to return.}
+\docparam{which}{One of the wxICON\_XXX specifies which icon to return.}
+
+See \helpref{wxMessageBox}{wxmessagebox} for a list of icon identifiers.
\membersection{wxApp::SetUseBestVisual}\label{wxappsetusebestvisual}
case under Solaris and IRIX, where the default visual is only 8-bit whereas certain
appications are supposed to run in TrueColour mode.
-Note that this function has to be called in the constructor of the {\tt wxApp}
+Note that this function has to be called in the constructor of the {\tt wxApp}
instance and won't have any effect when called later on.
This function currently only has effect under GTK.
\docparam{flag}{If TRUE, the app will use the best visual.}
+\membersection{wxApp::Yield}\label{wxappyield}
+
+\func{bool}{Yield}{\param{bool}{ onlyIfNeeded = FALSE}}
+
+Yields control to pending messages in the windowing system. This can be useful, for example, when a
+time-consuming process writes to a text window. Without an occasional
+yield, the text window will not be updated properly, and on systems with
+cooperative multitasking, such as Windows 3.1 other processes will not respond.
+
+Caution should be exercised, however, since yielding may allow the
+user to perform actions which are not compatible with the current task.
+Disabling menu items or whole menus during processing can avoid unwanted
+reentrance of code: see \helpref{::wxSafeYield}{wxsafeyield} for a better
+function.
+
+Note that Yield() will not flush the message logs. This is intentional as
+calling Yield() is usually done to quickly update the screen and popping up a
+message box dialog may be undesirable. If you do wish to flush the log
+messages immediately (otherwise it will be done during the next idle loop
+iteration), call \helpref{wxLog::FlushActive}{wxlogflushactive}.
+
+Calling Yield() recursively is normally an error and an assert failure is
+raised in debug build if such situation is detected. However if the the
+{\it onlyIfNeeded} parameter is {\tt TRUE}, the method will just silently
+return {\tt FALSE} instead.
+
projects / wxWidgets.git / blobdiff