function.tex

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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Name:        function.tex
%% Purpose:     Functions and macros
%% Author:      wxWidgets Team
%% Modified by:
%% Created:
%% RCS-ID:      $Id: function.tex,v 1.248 2006/05/31 21:34:54 VZ Exp $
%% Copyright:   (c) wxWidgets Team
%% License:     wxWindows license
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\chapter{Functions}\label{functions}
\setheader{{\it CHAPTER \thechapter}}{}{}{}{}{{\it CHAPTER \thechapter}}%
\setfooter{\thepage}{}{}{}{}{\thepage}

The functions and macros defined in wxWidgets are described here: you can
either look up a function using the alphabetical listing of them or find it in
the corresponding topic.

\section{Alphabetical functions and macros list}\label{functionsalphabetically}

\helpref{CLASSINFO}{classinfo}\\
\helpref{copystring}{copystring}\\
\helpref{DECLARE\_ABSTRACT\_CLASS}{declareabstractclass}\\
\helpref{DECLARE\_APP}{declareapp}\\
\helpref{DECLARE\_CLASS}{declareclass}\\
\helpref{DECLARE\_DYNAMIC\_CLASS}{declaredynamicclass}\\
\helpref{IMPLEMENT\_ABSTRACT\_CLASS2}{implementabstractclass2}\\
\helpref{IMPLEMENT\_ABSTRACT\_CLASS}{implementabstractclass}\\
\helpref{IMPLEMENT\_APP}{implementapp}\\
\helpref{IMPLEMENT\_CLASS2}{implementclass2}\\
\helpref{IMPLEMENT\_CLASS}{implementclass}\\
\helpref{IMPLEMENT\_DYNAMIC\_CLASS2}{implementdynamicclass2}\\
\helpref{IMPLEMENT\_DYNAMIC\_CLASS}{implementdynamicclass}\\
\helpref{wxASSERT}{wxassert}\\
\helpref{wxASSERT\_MIN\_BITSIZE}{wxassertminbitsize}\\
\helpref{wxASSERT\_MSG}{wxassertmsg}\\
\helpref{wxBeginBusyCursor}{wxbeginbusycursor}\\
\helpref{wxBell}{wxbell}\\
\helpref{wxBITMAP}{wxbitmapmacro}\\
\helpref{wxCHANGE\_UMASK}{wxchangeumask}\\
\helpref{wxCHECK}{wxcheck}\\
\helpref{wxCHECK2\_MSG}{wxcheck2msg}\\
\helpref{wxCHECK2}{wxcheck2}\\
\helpref{wxCHECK\_GCC\_VERSION}{wxcheckgccversion}\\
\helpref{wxCHECK\_MSG}{wxcheckmsg}\\
\helpref{wxCHECK\_RET}{wxcheckret}\\
\helpref{wxCHECK\_VERSION}{wxcheckversion}\\
\helpref{wxCHECK\_VERSION\_FULL}{wxcheckversionfull}\\
\helpref{wxCHECK\_W32API\_VERSION}{wxcheckw32apiversion}\\
\helpref{wxClientDisplayRect}{wxclientdisplayrect}\\
\helpref{wxClipboardOpen}{functionwxclipboardopen}\\
\helpref{wxCloseClipboard}{wxcloseclipboard}\\
\helpref{wxColourDisplay}{wxcolourdisplay}\\
\helpref{wxCOMPILE\_TIME\_ASSERT}{wxcompiletimeassert}\\
\helpref{wxCOMPILE\_TIME\_ASSERT2}{wxcompiletimeassert2}\\
\helpref{wxCONCAT}{wxconcat}\\
\helpref{wxConcatFiles}{wxconcatfiles}\\
\helpref{wxConstCast}{wxconstcast}\\
\helpref{wxCopyFile}{wxcopyfile}\\
\helpref{wxCreateDynamicObject}{wxcreatedynamicobject}\\
\helpref{wxCreateFileTipProvider}{wxcreatefiletipprovider}\\
\helpref{wxCRIT\_SECT\_DECLARE}{wxcritsectdeclare}\\
\helpref{wxCRIT\_SECT\_DECLARE\_MEMBER}{wxcritsectdeclaremember}\\
\helpref{wxCRIT\_SECT\_LOCKER}{wxcritsectlocker}\\
\helpref{wxCRITICAL\_SECTION}{wxcriticalsectionmacro}\\ % wxcs already taken!
\helpref{wxDDECleanUp}{wxddecleanup}\\
\helpref{wxDDEInitialize}{wxddeinitialize}\\
\helpref{wxDROP\_ICON}{wxdropicon}\\
\helpref{wxDebugMsg}{wxdebugmsg}\\
\helpref{WXDEBUG\_NEW}{debugnew}\\
\helpref{wxDirExists}{functionwxdirexists}\\
\helpref{wxDirSelector}{wxdirselector}\\
\helpref{wxDisplayDepth}{wxdisplaydepth}\\
\helpref{wxDisplaySize}{wxdisplaysize}\\
\helpref{wxDisplaySizeMM}{wxdisplaysizemm}\\
\helpref{wxDos2UnixFilename}{wxdos2unixfilename}\\
\helpref{wxDynamicCastThis}{wxdynamiccastthis}\\
\helpref{wxDynamicCast}{wxdynamiccast}\\
\helpref{wxDYNLIB\_FUNCTION}{wxdynlibfunction}\\
\helpref{wxEmptyClipboard}{wxemptyclipboard}\\
\helpref{wxEnableTopLevelWindows}{wxenabletoplevelwindows}\\
\helpref{wxEndBusyCursor}{wxendbusycursor}\\
\helpref{wxENTER\_CRIT\_SECT}{wxentercritsect}\\
\helpref{wxEntry}{wxentry}\\
\helpref{wxEnumClipboardFormats}{wxenumclipboardformats}\\
\helpref{wxError}{wxerror}\\
\helpref{wxExecute}{wxexecute}\\
\helpref{wxExit}{wxexit}\\
\helpref{wxEXPLICIT}{wxexplicit}\\
\helpref{wxFAIL\_MSG}{wxfailmsg}\\
\helpref{wxFAIL}{wxfail}\\
\helpref{wxFatalError}{wxfatalerror}\\
\helpref{wxFileExists}{functionwxfileexists}\\
\helpref{wxFileModificationTime}{wxfilemodificationtime}\\
\helpref{wxFileNameFromPath}{wxfilenamefrompath}\\
\helpref{wxFileSelector}{wxfileselector}\\
\helpref{wxFindFirstFile}{wxfindfirstfile}\\
\helpref{wxFindMenuItemId}{wxfindmenuitemid}\\
\helpref{wxFindNextFile}{wxfindnextfile}\\
\helpref{wxFindWindowAtPointer}{wxfindwindowatpointer}\\
\helpref{wxFindWindowAtPoint}{wxfindwindowatpoint}\\
\helpref{wxFindWindowByLabel}{wxfindwindowbylabel}\\
\helpref{wxFindWindowByName}{wxfindwindowbyname}\\
\helpref{wxFinite}{wxfinite}\\
\helpref{wxGetActiveWindow}{wxgetactivewindow}\\
\helpref{wxGetApp}{wxgetapp}\\
\helpref{wxGetBatteryState}{wxgetbatterystate}\\
\helpref{wxGetClipboardData}{wxgetclipboarddata}\\
\helpref{wxGetClipboardFormatName}{wxgetclipboardformatname}\\
\helpref{wxGetColourFromUser}{wxgetcolourfromuser}\\
\helpref{wxGetCwd}{wxgetcwd}\\
\helpref{wxGetDiskSpace}{wxgetdiskspace}\\
\helpref{wxGetDisplayName}{wxgetdisplayname}\\
\helpref{wxGetDisplaySize}{wxdisplaysize}\\
\helpref{wxGetDisplaySizeMM}{wxdisplaysizemm}\\
\helpref{wxGetElapsedTime}{wxgetelapsedtime}\\
\helpref{wxGetEmailAddress}{wxgetemailaddress}\\
\helpref{wxGetEnv}{wxgetenv}\\
\helpref{wxGetFileKind}{wxgetfilekind}\\
\helpref{wxGetFontFromUser}{wxgetfontfromuser}\\
\helpref{wxGetFreeMemory}{wxgetfreememory}\\
\helpref{wxGetFullHostName}{wxgetfullhostname}\\
\helpref{wxGetHomeDir}{wxgethomedir}\\
\helpref{wxGetHostName}{wxgethostname}\\
\helpref{wxGetKeyState}{wxgetkeystate}\\
\helpref{wxGetLocalTimeMillis}{wxgetlocaltimemillis}\\
\helpref{wxGetLocalTime}{wxgetlocaltime}\\
\helpref{wxGetMousePosition}{wxgetmouseposition}\\
\helpref{wxGetMouseState}{wxgetmousestate}\\
\helpref{wxGetMultipleChoices}{wxgetmultiplechoices}\\
\helpref{wxGetMultipleChoice}{wxgetmultiplechoice}\\
\helpref{wxGetNumberFromUser}{wxgetnumberfromuser}\\
\helpref{wxGetOSDirectory}{wxgetosdirectory}\\
\helpref{wxGetOsDescription}{wxgetosdescription}\\
\helpref{wxGetOsVersion}{wxgetosversion}\\
\helpref{wxGetPasswordFromUser}{wxgetpasswordfromuser}\\
\helpref{wxGetPowerType}{wxgetpowertype}\\
\helpref{wxGetPrinterCommand}{wxgetprintercommand}\\
\helpref{wxGetPrinterFile}{wxgetprinterfile}\\
\helpref{wxGetPrinterMode}{wxgetprintermode}\\
\helpref{wxGetPrinterOptions}{wxgetprinteroptions}\\
\helpref{wxGetPrinterOrientation}{wxgetprinterorientation}\\
\helpref{wxGetPrinterPreviewCommand}{wxgetprinterpreviewcommand}\\
\helpref{wxGetPrinterScaling}{wxgetprinterscaling}\\
\helpref{wxGetPrinterTranslation}{wxgetprintertranslation}\\
\helpref{wxGetProcessId}{wxgetprocessid}\\
\helpref{wxGetResource}{wxgetresource}\\
\helpref{wxGetSingleChoiceData}{wxgetsinglechoicedata}\\
\helpref{wxGetSingleChoiceIndex}{wxgetsinglechoiceindex}\\
\helpref{wxGetSingleChoice}{wxgetsinglechoice}\\
\helpref{wxGetTempFileName}{wxgettempfilename}\\
\helpref{wxGetTextFromUser}{wxgettextfromuser}\\
\helpref{wxGetTopLevelParent}{wxgettoplevelparent}\\
\helpref{wxGetTranslation}{wxgettranslation}\\
\helpref{wxGetUTCTime}{wxgetutctime}\\
\helpref{wxGetUserHome}{wxgetuserhome}\\
\helpref{wxGetUserId}{wxgetuserid}\\
\helpref{wxGetUserName}{wxgetusername}\\
\helpref{wxGetWorkingDirectory}{wxgetworkingdirectory}\\
\helpref{wxGetenv}{wxgetenvmacro}\\
\helpref{wxHandleFatalExceptions}{wxhandlefatalexceptions}\\
\helpref{wxICON}{wxiconmacro}\\
\helpref{wxINTXX\_SWAP\_ALWAYS}{intswapalways}\\
\helpref{wxINTXX\_SWAP\_ON\_BE}{intswaponbe}\\
\helpref{wxINTXX\_SWAP\_ON\_LE}{intswaponle}\\
\helpref{wxInitAllImageHandlers}{wxinitallimagehandlers}\\
\helpref{wxInitialize}{wxinitialize}\\
\helpref{wxIsAbsolutePath}{wxisabsolutepath}\\
\helpref{wxIsBusy}{wxisbusy}\\
\helpref{wxIsClipboardFormatAvailable}{wxisclipboardformatavailable}\\
\helpref{wxIsDebuggerRunning}{wxisdebuggerrunning}\\
\helpref{wxIsEmpty}{wxisempty}\\
\helpref{wxIsMainThread}{wxismainthread}\\
\helpref{wxIsNaN}{wxisnan}\\
\helpref{wxIsWild}{wxiswild}\\
\helpref{wxKill}{wxkill}\\
\helpref{wxLaunchDefaultBrowser}{wxlaunchdefaultbrowser}\\
\helpref{wxLEAVE\_CRIT\_SECT}{wxleavecritsect}\\
\helpref{wxLoadUserResource}{wxloaduserresource}\\
\helpref{wxLogDebug}{wxlogdebug}\\
\helpref{wxLogError}{wxlogerror}\\
\helpref{wxLogFatalError}{wxlogfatalerror}\\
\helpref{wxLogMessage}{wxlogmessage}\\
\helpref{wxLogStatus}{wxlogstatus}\\
\helpref{wxLogSysError}{wxlogsyserror}\\
\helpref{wxLogTrace}{wxlogtrace}\\
\helpref{wxLogVerbose}{wxlogverbose}\\
\helpref{wxLogWarning}{wxlogwarning}\\
\helpref{wxLL}{wxll}\\
\helpref{wxLongLongFmtSpec}{wxlonglongfmtspec}\\
\helpref{wxMakeMetafilePlaceable}{wxmakemetafileplaceable}\\
\helpref{wxMatchWild}{wxmatchwild}\\
\helpref{wxMessageBox}{wxmessagebox}\\
\helpref{wxMilliSleep}{wxmillisleep}\\
\helpref{wxMicroSleep}{wxmicrosleep}\\
\helpref{wxMkdir}{wxmkdir}\\
\helpref{wxMutexGuiEnter}{wxmutexguienter}\\
\helpref{wxMutexGuiLeave}{wxmutexguileave}\\
\helpref{wxNewId}{wxnewid}\\
\helpref{wxNow}{wxnow}\\
\helpref{wxOnAssert}{wxonassert}\\
\helpref{wxON\_BLOCK\_EXIT}{wxonblockexit}\\
\helpref{wxON\_BLOCK\_EXIT\_OBJ}{wxonblockexitobj}\\
\helpref{wxOpenClipboard}{wxopenclipboard}\\
\helpref{wxParseCommonDialogsFilter}{wxparsecommondialogsfilter}\\
\helpref{wxPathOnly}{wxpathonly}\\
\helpref{wxPLURAL}{wxplural}\\
\helpref{wxPostDelete}{wxpostdelete}\\
\helpref{wxPostEvent}{wxpostevent}\\
\helpref{wxRegisterClipboardFormat}{wxregisterclipboardformat}\\
\helpref{wxRegisterId}{wxregisterid}\\
\helpref{wxRemoveFile}{wxremovefile}\\
\helpref{wxRenameFile}{wxrenamefile}\\
\helpref{wxRmdir}{wxrmdir}\\
\helpref{wxSafeShowMessage}{wxsafeshowmessage}\\
\helpref{wxSafeYield}{wxsafeyield}\\
\helpref{wxSetClipboardData}{wxsetclipboarddata}\\
\helpref{wxSetCursor}{wxsetcursor}\\
\helpref{wxSetDisplayName}{wxsetdisplayname}\\
\helpref{wxSetEnv}{wxsetenv}\\
\helpref{wxSetPrinterCommand}{wxsetprintercommand}\\
\helpref{wxSetPrinterFile}{wxsetprinterfile}\\
\helpref{wxSetPrinterMode}{wxsetprintermode}\\
\helpref{wxSetPrinterOptions}{wxsetprinteroptions}\\
\helpref{wxSetPrinterOrientation}{wxsetprinterorientation}\\
\helpref{wxSetPrinterPreviewCommand}{wxsetprinterpreviewcommand}\\
\helpref{wxSetPrinterScaling}{wxsetprinterscaling}\\
\helpref{wxSetPrinterTranslation}{wxsetprintertranslation}\\
\helpref{wxSetWorkingDirectory}{wxsetworkingdirectory}\\
\helpref{wxShell}{wxshell}\\
\helpref{wxShowTip}{wxshowtip}\\
\helpref{wxShutdown}{wxshutdown}\\
\helpref{wxSleep}{wxsleep}\\
\helpref{wxSnprintf}{wxsnprintf}\\
\helpref{wxSplitPath}{wxsplitfunction}\\
\helpref{wxStartTimer}{wxstarttimer}\\
\helpref{wxStaticCast}{wxstaticcast}\\
\helpref{wxStrcmp}{wxstrcmp}\\
\helpref{wxStricmp}{wxstricmp}\\
\helpref{wxStringEq}{wxstringeq}\\
\helpref{wxStringMatch}{wxstringmatch}\\
\helpref{wxStringTokenize}{wxstringtokenize}\\
\helpref{wxStripMenuCodes}{wxstripmenucodes}\\
\helpref{wxStrlen}{wxstrlen}\\
\helpref{wxSUPPRESS\_GCC\_PRIVATE\_DTOR\_WARNING}{wxsuppressgccprivatedtorwarning}\\
\helpref{wxSysErrorCode}{wxsyserrorcode}\\
\helpref{wxSysErrorMsg}{wxsyserrormsg}\\
\helpref{wxT}{wxt}\\
\helpref{wxTrace}{wxtrace}\\
\helpref{WXTRACE}{trace}\\
\helpref{wxTraceLevel}{wxtracelevel}\\
\helpref{WXTRACELEVEL}{tracelevel}\\
\helpref{wxTransferFileToStream}{wxtransferfiletostream}\\
\helpref{wxTransferStreamToFile}{wxtransferstreamtofile}\\
\helpref{wxTrap}{wxtrap}\\
\helpref{wxULL}{wxull}\\
\helpref{wxUninitialize}{wxuninitialize}\\
\helpref{wxUnix2DosFilename}{wxunix2dosfilename}\\
\helpref{wxUnsetEnv}{wxunsetenv}\\
\helpref{wxUsleep}{wxusleep}\\
\helpref{wxVaCopy}{wxvacopy}\\
\helpref{wxVsnprintf}{wxvsnprintf}\\
\helpref{wxWakeUpIdle}{wxwakeupidle}\\
\helpref{wxWriteResource}{wxwriteresource}\\
\helpref{wxYield}{wxyield}\\
\helpref{wx\_const\_cast}{wxconstcastraw}\\
\helpref{wx\_reinterpret\_cast}{wxreinterpretcastraw}\\
\helpref{wx\_static\_cast}{wxstaticcastraw}\\
\helpref{wx\_truncate\_cast}{wxtruncatecast}\\
\helpref{\_}{underscore}\\
\helpref{\_T}{underscoret}
\helpref{\_\_WXFUNCTION\_\_}{wxfunction}



\section{Version macros}\label{versionfunctions}

The following constants are defined in wxWidgets:

\begin{itemize}\itemsep=0pt
\item {\tt wxMAJOR\_VERSION} is the major version of wxWidgets
\item {\tt wxMINOR\_VERSION} is the minor version of wxWidgets
\item {\tt wxRELEASE\_NUMBER} is the release number
\item {\tt wxSUBRELEASE\_NUMBER} is the subrelease number which is $0$ for all
official releases
\end{itemize}

For example, the values or these constants for wxWidgets 2.1.15 are 2, 1 and
15.

Additionally, {\tt wxVERSION\_STRING} is a user-readable string containing
the full wxWidgets version and {\tt wxVERSION\_NUMBER} is a combination of the
three version numbers above: for 2.1.15, it is 2115 and it is 2200 for
wxWidgets 2.2.

The subrelease number is only used for the sources in between official releases
and so normally is not useful.

\wxheading{Include files}

<wx/version.h> or <wx/defs.h>


\membersection{wxCHECK\_GCC\_VERSION}\label{wxcheckgccversion}

\func{bool}{wxCHECK\_GCC\_VERSION}{\param{}{major, minor, release}}

Returns $1$ if the compiler being used to compile the code is GNU C++
compiler (g++) version major.minor.release or greater. Otherwise, and also if
the compiler is not GNU C++ at all, returns $0$.


\membersection{wxCHECK\_VERSION}\label{wxcheckversion}

\func{bool}{wxCHECK\_VERSION}{\param{}{major, minor, release}}

This is a macro which evaluates to true if the current wxWidgets version is at
least major.minor.release.

For example, to test if the program is compiled with wxWidgets 2.2 or higher,
the following can be done:

\begin{verbatim}
    wxString s;
#if wxCHECK_VERSION(2, 2, 0)
    if ( s.StartsWith("foo") )
#else // replacement code for old version
    if ( strncmp(s, "foo", 3) == 0 )
#endif
    {
        ...
    }
\end{verbatim}


\membersection{wxCHECK\_VERSION\_FULL}\label{wxcheckversionfull}

\func{bool}{wxCHECK\_VERSION\_FULL}{\param{}{major, minor, release, subrel}}

Same as \helpref{wxCHECK\_VERSION}{wxcheckversion} but also checks that
\texttt{wxSUBRELEASE\_NUMBER} is at least \arg{subrel}.


\membersection{wxCHECK\_W32API\_VERSION}\label{wxcheckw32apiversion}

\func{bool}{wxCHECK\_GCC\_VERSION}{\param{}{major, minor, release}}

Returns $1$ if the version of w32api headers used is major.minor.release or
greater. Otherwise, and also if we are not compiling with mingw32/cygwin under
Win32 at all, returns $0$.



\section{Application initialization and termination}\label{appinifunctions}

The functions in this section are used on application startup/shutdown and also
to control the behaviour of the main event loop of the GUI programs.


\membersection{::wxEntry}\label{wxentry}

This initializes wxWidgets in a platform-dependent way. Use this if you
are not using the default wxWidgets entry code (e.g. main or WinMain). For example,
you can initialize wxWidgets from an Microsoft Foundation Classes application using
this function.