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[wxWidgets.git] / docs / latex / wx / function.tex

diff --git a/docs/latex/wx/function.tex b/docs/latex/wx/function.tex
index b85ec925e5674b0cfe3e08f5eb690501a91f1ebe..ee3b9474735ffe8c4f4ea1b06ef22f1f1996617a 100644 (file)
--- a/docs/latex/wx/function.tex
+++ b/docs/latex/wx/function.tex
@@ -11,7 +11,7 @@ The following constants are defined in wxWindows:
 \begin{itemize}\itemsep=0pt
 \item {\tt wxMAJOR\_VERSION} is the major version of wxWindows
 \item {\tt wxMINOR\_VERSION} is the minor version of wxWindows
 \begin{itemize}\itemsep=0pt
 \item {\tt wxMAJOR\_VERSION} is the major version of wxWindows
 \item {\tt wxMINOR\_VERSION} is the minor version of wxWindows

-\item {\tt wxRELASE\_NUMBER} is the release number
+\item {\tt wxRELEASE\_NUMBER} is the release number

 \end{itemize}
 
 For example, the values or these constants for wxWindows 2.1.15 are 2, 1 and
 \end{itemize}
 
 For example, the values or these constants for wxWindows 2.1.15 are 2, 1 and


@@ -177,6 +177,27 @@ Returns the next file that matches the path passed to \helpref{wxFindFirstFile}{
 
 See \helpref{wxFindFirstFile}{wxfindfirstfile} for an example.
 
 
 See \helpref{wxFindFirstFile}{wxfindfirstfile} for an example.
 

+\membersection{::wxGetDiskSpace}\label{wxgetdiskspace}
+
+\func{bool}{wxGetDiskSpace}{\param{const wxString\& }{path}, \param{wxLongLong }{*total = NULL}, \param{wxLongLong }{*free = NULL}}
+
+This function returns the total number of bytes and number of free bytes on
+the disk containing the directory {\it path} (it should exist). Both
+{\it total} and {\it free} parameters may be {\tt NULL} if the corresponding
+information is not needed.
+
+\wxheading{Returns}
+
+{\tt TRUE} on success, {\tt FALSE} if an error occured (for example, the
+directory doesn't exist).
+
+\wxheading{Portability}
+
+This function is implemented for Win16 (only for drives less than 2Gb), Win32,
+Mac OS and generic Unix provided the system has {\tt statfs()} function.
+
+This function first appeared in wxWindows 2.3.2.
+

 \membersection{::wxGetOSDirectory}\label{wxgetosdirectory}
 
 \func{wxString}{wxGetOSDirectory}{\void}
 \membersection{::wxGetOSDirectory}\label{wxgetosdirectory}
 
 \func{wxString}{wxGetOSDirectory}{\void}


@@ -244,15 +265,19 @@ if the buffer is NULL.
 
 \func{bool}{wxGetTempFileName}{\param{const wxString\& }{prefix}, \param{wxString\& }{buf}}
 
 
 \func{bool}{wxGetTempFileName}{\param{const wxString\& }{prefix}, \param{wxString\& }{buf}}
 

-Makes a temporary filename based on {\it prefix}, opens and closes the file,
-and places the name in {\it buf}. If {\it buf} is NULL, new store
-is allocated for the temporary filename using {\it new}.
-
-Under Windows, the filename will include the drive and name of the
-directory allocated for temporary files (usually the contents of the
-TEMP variable). Under Unix, the {\tt /tmp} directory is used.
-
-It is the application's responsibility to create and delete the file.
+%% Makes a temporary filename based on {\it prefix}, opens and closes the file,
+%% and places the name in {\it buf}. If {\it buf} is NULL, new store
+%% is allocated for the temporary filename using {\it new}.
+%%
+%% Under Windows, the filename will include the drive and name of the
+%% directory allocated for temporary files (usually the contents of the
+%% TEMP variable). Under Unix, the {\tt /tmp} directory is used.
+%%
+%% It is the application's responsibility to create and delete the file.
+
+These functions are obsolete, please use\rtfsp
+\helpref{wxFileName::CreateTempFileName}{wxfilenamecreatetempfilename}\rtfsp
+instead.

 
 \membersection{::wxIsWild}\label{wxiswild}
 
 
 \membersection{::wxIsWild}\label{wxiswild}
 


@@ -461,15 +486,34 @@ if successful, FALSE otherwise.
 Makes a copy of the string {\it s} using the C++ new operator, so it can be
 deleted with the {\it delete} operator.
 
 Makes a copy of the string {\it s} using the C++ new operator, so it can be
 deleted with the {\it delete} operator.
 

+\membersection{::wxIsEmpty}\label{wxisempty}
+
+\func{bool}{wxIsEmpty}{\param{const char *}{ p}}
+
+Returns {\tt TRUE} if the pointer is either {\tt NULL} or points to an empty
+string, {\tt FALSE} otherwise.
+
+\membersection{::wxStricmp}\label{wxstricmp}
+
+\func{int}{wxStricmp}{\param{const char *}{p1}, \param{const char *}{p2}}
+
+Returns a negative value, 0, or positive value if {\it p1} is less than, equal
+to or greater than {\it p2}. The comparison is case-insensitive.
+
+This function complements the standard C function {\it strcmp()} which performs
+case-sensitive comparison.
+

 \membersection{::wxStringMatch}
 
 \func{bool}{wxStringMatch}{\param{const wxString\& }{s1}, \param{const wxString\& }{s2},\\
   \param{bool}{ subString = TRUE}, \param{bool}{ exact = FALSE}}
 
 \membersection{::wxStringMatch}
 
 \func{bool}{wxStringMatch}{\param{const wxString\& }{s1}, \param{const wxString\& }{s2},\\
   \param{bool}{ subString = TRUE}, \param{bool}{ exact = FALSE}}
 

-Returns TRUE if the substring {\it s1} is found within {\it s2},
-ignoring case if {\it exact} is FALSE. If {\it subString} is FALSE,
+Returns {\tt TRUE} if the substring {\it s1} is found within {\it s2},
+ignoring case if {\it exact} is FALSE. If {\it subString} is {\tt FALSE},

 no substring matching is done.
 
 no substring matching is done.
 

+This function is obsolete, use \helpref{wxString::Find}{wxstringfind} instead.
+

 \membersection{::wxStringEq}\label{wxstringeq}
 
 \func{bool}{wxStringEq}{\param{const wxString\& }{s1}, \param{const wxString\& }{s2}}
 \membersection{::wxStringEq}\label{wxstringeq}
 
 \func{bool}{wxStringEq}{\param{const wxString\& }{s1}, \param{const wxString\& }{s2}}


@@ -480,30 +524,15 @@ A macro defined as:
 #define wxStringEq(s1, s2) (s1 && s2 && (strcmp(s1, s2) == 0))
 \end{verbatim}
 
 #define wxStringEq(s1, s2) (s1 && s2 && (strcmp(s1, s2) == 0))
 \end{verbatim}
 

-\membersection{::IsEmpty}\label{isempty}
-
-\func{bool}{IsEmpty}{\param{const char *}{ p}}
+This function is obsolete, use \helpref{wxString}{wxstring} instead.

 
 

-Returns TRUE if the string is empty, FALSE otherwise. It is safe to pass NULL
-pointer to this function and it will return TRUE for it.
+\membersection{::wxStrlen}\label{wxstrlen}

 
 

-\membersection{::Stricmp}\label{stricmp}
-
-\func{int}{Stricmp}{\param{const char *}{p1}, \param{const char *}{p2}}
-
-Returns a negative value, 0, or positive value if {\it p1} is less than, equal
-to or greater than {\it p2}. The comparison is case-insensitive.
-
-This function complements the standard C function {\it strcmp()} which performs
-case-sensitive comparison.
-
-\membersection{::Strlen}\label{strlen}
-
-\func{size\_t}{Strlen}{\param{const char *}{ p}}
+\func{size\_t}{wxStrlen}{\param{const char *}{ p}}

 
 This is a safe version of standard function {\it strlen()}: it does exactly the
 same thing (i.e. returns the length of the string) except that it returns 0 if
 
 This is a safe version of standard function {\it strlen()}: it does exactly the
 same thing (i.e. returns the length of the string) except that it returns 0 if

-{\it p} is the NULL pointer.
+{\it p} is the {\tt NULL} pointer.

 
 \membersection{::wxGetTranslation}\label{wxgettranslation}
 
 
 \membersection{::wxGetTranslation}\label{wxgettranslation}
 


@@ -572,6 +601,32 @@ is remembered between the 2 program runs.}
 
 <wx/tipdlg.h>
 
 
 <wx/tipdlg.h>
 

+\membersection{::wxDirSelector}\label{wxdirselector}
+
+\func{wxString}{wxDirSelector}{\param{const wxString\& }{message = wxDirSelectorPromptStr},\\
+ \param{const wxString\& }{default\_path = ""},\\
+ \param{long }{style = 0}, \param{const wxPoint\& }{pos = wxDefaultPosition},\\
+ \param{wxWindow *}{parent = NULL}}
+
+Pops up a directory selector dialog. The arguments have the same meaning as
+those of wxDirDialog::wxDirDialog(). The message is displayed at the top,
+and the default\_path, if specified, is set as the initial selection.
+
+The application must check for an empty return value (if the user pressed
+Cancel). For example:
+
+\begin{verbatim}
+const wxString& dir = wxDirSelector("Choose a folder");
+if ( !dir.empty() )
+{
+  ...
+}
+\end{verbatim}
+
+\wxheading{Include files}
+
+<wx/dirdlg.h>
+

 \membersection{::wxFileSelector}\label{wxfileselector}
 
 \func{wxString}{wxFileSelector}{\param{const wxString\& }{message}, \param{const wxString\& }{default\_path = ""},\\
 \membersection{::wxFileSelector}\label{wxfileselector}
 
 \func{wxString}{wxFileSelector}{\param{const wxString\& }{message}, \param{const wxString\& }{default\_path = ""},\\


@@ -1466,7 +1521,12 @@ should ensure that this can cause no recursion, in the simplest case by
 calling \helpref{wxEnableTopLevelWindows(FALSE)}{wxenabletoplevelwindows}.
 
 For asynchronous execution, however, the return value is the process id and
 calling \helpref{wxEnableTopLevelWindows(FALSE)}{wxenabletoplevelwindows}.
 
 For asynchronous execution, however, the return value is the process id and

-zero value indicates that the command could not be executed.
+zero value indicates that the command could not be executed. As an added
+complication, the return value of $-1$ in this case indicattes that we didn't
+launch a new process, but connected to the running one (this can only happen in
+case of using DDE under Windows for command execution). In particular, in this,
+and only this, case the calling code will not get the notification about
+process termination.

 
 If callback isn't NULL and if execution is asynchronous (note that callback
 parameter can not be non-NULL for synchronous execution),
 
 If callback isn't NULL and if execution is asynchronous (note that callback
 parameter can not be non-NULL for synchronous execution),


@@ -1642,7 +1702,7 @@ Gets operating system version information.
 
 \begin{twocollist}\itemsep=0pt
 \twocolitemruled{Platform}{Return types}
 
 \begin{twocollist}\itemsep=0pt
 \twocolitemruled{Platform}{Return types}

-\twocolitem{Macintosh}{Return value is wxMACINTOSH.}
+\twocolitem{Mac OS}{Return value is wxMAC when compiled with CodeWarrior under Mac OS 8.x/9.x and Mac OS X, wxMAC\_DARWIN when compiled with the Apple Developer Tools under Mac OS X.}

 \twocolitem{GTK}{Return value is wxGTK, For GTK 1.0, {\it major} is 1, {\it minor} is 0. }
 \twocolitem{Motif}{Return value is wxMOTIF\_X, {\it major} is X version, {\it minor} is X revision.}
 \twocolitem{OS/2}{Return value is wxOS2\_PM.}
 \twocolitem{GTK}{Return value is wxGTK, For GTK 1.0, {\it major} is 1, {\it minor} is 0. }
 \twocolitem{Motif}{Return value is wxMOTIF\_X, {\it major} is X version, {\it minor} is X revision.}
 \twocolitem{OS/2}{Return value is wxOS2\_PM.}


@@ -1744,30 +1804,40 @@ normal way which usually just means that the application will be terminated.
 Calling wxHandleFatalExceptions() with {\it doIt} equal to FALSE will restore
 this default behaviour.
 
 Calling wxHandleFatalExceptions() with {\it doIt} equal to FALSE will restore
 this default behaviour.
 

-\membersection{::wxKill}\label{wxkill}
+\membersection{::wxInitAllImageHandlers}\label{wxinitallimagehandlers}
+
+\func{void}{wxInitAllImageHandlers}{\void}

 
 

-\func{int}{wxKill}{\param{long}{ pid}, \param{int}{ sig}}
+Initializes all available image handlers. For a list of available handlers,
+see \helpref{wxImage}{wximage}.

 
 

-Under Unix (the only supported platform), equivalent to the Unix kill function.
-Returns 0 on success, -1 on failure.
+\wxheading{See also}

 
 

-Tip: sending a signal of 0 to a process returns -1 if the process does not exist.
-It does not raise a signal in the receiving process.
+\helpref{wxImage}{wximage}, \helpref{wxImageHandler}{wximagehandler}

 
 \wxheading{Include files}
 
 
 \wxheading{Include files}
 

-<wx/utils.h>
+<wx/image.h>

 
 

-\membersection{::wxInitAllImageHandlers}\label{wxinitallimagehandlers}
+\membersection{::wxInitialize}\label{wxinitialize}

 
 

-\func{void}{wxInitAllImageHandlers}{\void}
+\func{bool}{wxInitialize}{\void}

 
 

-Initializes all available image handlers. For a list of available handlers,
-see \helpref{wxImage}{wximage}.
+This function is used in wxBase only and only if you don't create
+\helpref{wxApp}{wxapp} object at all. In this case you must call it from your
+{\tt main()} function before calling any other wxWindows functions.

 
 

-\wxheading{See also}
+If the function returns {\tt FALSE} the initialization could not be performed,
+in this case the library cannot be used and
+\helpref{wxUninitialize}{wxuninitialize} shouldn't be called neither.

 
 

-\helpref{wxImage}{wximage}, \helpref{wxImageHandler}{wximagehandler}
+This function may be called several times but
+\helpref{wxUninitialize}{wxuninitialize} must be called for each successful
+call to this function.
+
+\wxheading{Include files}
+
+<wx/app.h>

 
 \membersection{::wxIsBusy}\label{wxisbusy}
 
 
 \membersection{::wxIsBusy}\label{wxisbusy}
 


@@ -1782,6 +1852,63 @@ See also \helpref{wxBusyCursor}{wxbusycursor}.
 
 <wx/utils.h>
 
 
 <wx/utils.h>
 

+\membersection{::wxKill}\label{wxkill}
+
+\func{int}{wxKill}{\param{long}{ pid}, \param{int}{ sig = wxSIGTERM}, \param{wxKillError }{*rc = NULL}}
+
+Equivalent to the Unix kill function: send the given signal {\it sig} to the
+process with PID {\it pid}. The valud signal values are
+
+\begin{verbatim}
+enum wxSignal
+{
+    wxSIGNONE = 0,  // verify if the process exists under Unix
+    wxSIGHUP,
+    wxSIGINT,
+    wxSIGQUIT,
+    wxSIGILL,
+    wxSIGTRAP,
+    wxSIGABRT,
+    wxSIGEMT,
+    wxSIGFPE,
+    wxSIGKILL,      // forcefully kill, dangerous!
+    wxSIGBUS,
+    wxSIGSEGV,
+    wxSIGSYS,
+    wxSIGPIPE,
+    wxSIGALRM,
+    wxSIGTERM       // terminate the process gently
+};
+\end{verbatim}
+
+{\tt wxSIGNONE}, {\tt wxSIGKILL} and {\tt wxSIGTERM} have the same meaning
+under both Unix and Windows but all the other signals are equivalent to
+{\tt wxSIGTERM} under Windows.
+
+Returns 0 on success, -1 on failure. If {\it rc} parameter is not NULL, it will
+be filled with an element of {\tt wxKillError} enum:
+
+\begin{verbatim}
+enum wxKillError
+{
+    wxKILL_OK,              // no error
+    wxKILL_BAD_SIGNAL,      // no such signal
+    wxKILL_ACCESS_DENIED,   // permission denied
+    wxKILL_NO_PROCESS,      // no such process
+    wxKILL_ERROR            // another, unspecified error
+};
+\end{verbatim}
+
+\wxheading{See also}
+
+\helpref{wxProcess::Kill}{wxprocesskill},\rtfsp
+\helpref{wxProcess::Exists}{wxprocessexists},\rtfsp
+\helpref{Exec sample}{sampleexec}
+
+\wxheading{Include files}
+
+<wx/utils.h>
+

 \membersection{::wxLoadUserResource}\label{wxloaduserresource}
 
 \func{wxString}{wxLoadUserResource}{\param{const wxString\& }{resourceName}, \param{const wxString\& }{resourceType=``TEXT"}}
 \membersection{::wxLoadUserResource}\label{wxloaduserresource}
 
 \func{wxString}{wxLoadUserResource}{\param{const wxString\& }{resourceName}, \param{const wxString\& }{resourceType=``TEXT"}}


@@ -1974,6 +2101,31 @@ This function is now obsolete, replaced by \helpref{Log functions}{logfunctions}
 
 <wx/memory.h>
 
 
 <wx/memory.h>
 

+\membersection{::wxTrap}\label{wxtrap}
+
+\func{void}{wxTrap}{\void}
+
+In debug mode (when {\tt \_\_WXDEBUG\_\_} is defined) this function generates a
+debugger exception meaning that the control is passed to the debugger if one is
+attached to the process. Otherwise the program just terminates abnormally.
+
+In release mode this function does nothing.
+
+\wxheading{Include files}
+
+<wx/debug.h>
+
+\membersection{::wxUninitialize}\label{wxuninitialize}
+
+\func{void}{wxUninitialize}{\void}
+
+This function is for use in console (wxBase) programs only. It must be called
+once for each previous successful call to \helpref{wxInitialize}{wxinitialize}.
+
+\wxheading{Include files}
+
+<wx/app.h>
+

 \membersection{::wxUsleep}\label{wxusleep}
 
 \func{void}{wxUsleep}{\param{unsigned long}{ milliseconds}}
 \membersection{::wxUsleep}\label{wxusleep}
 
 \func{void}{wxUsleep}{\param{unsigned long}{ milliseconds}}


@@ -2021,22 +2173,10 @@ See also \helpref{wxGetResource}{wxgetresource}, \helpref{wxConfigBase}{wxconfig
 
 \func{bool}{wxYield}{\void}
 
 
 \func{bool}{wxYield}{\void}
 

-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.
+Calls \helpref{wxApp::Yield}{wxappyield}.

 
 

-Note that wxYield will not flush the message logs. This is intentional as
-calling wxYield 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}.
+This function is kept only for backwards compatibility, please use the
+wxApp method instead in any new code.

 
 \wxheading{Include files}
 
 
 \wxheading{Include files}
 


@@ -2336,7 +2476,7 @@ avoid using {\tt \#ifdef}s when creating bitmaps.
 
 \membersection{wxConstCast}\label{wxconstcast}
 
 
 \membersection{wxConstCast}\label{wxconstcast}
 

-\func{}{wxConstCast}{ptr, classname}
+\func{classname *}{wxConstCast}{ptr, classname}

 
 This macro expands into {\tt const\_cast<classname *>(ptr)} if the compiler
 supports {\it const\_cast} or into an old, C-style cast, otherwise.
 
 This macro expands into {\tt const\_cast<classname *>(ptr)} if the compiler
 supports {\it const\_cast} or into an old, C-style cast, otherwise.


@@ -2365,14 +2505,15 @@ In non-debug mode, this is defined as the normal new operator.
 
 \membersection{wxDynamicCast}\label{wxdynamiccast}
 
 
 \membersection{wxDynamicCast}\label{wxdynamiccast}
 

-\func{}{wxDynamicCast}{ptr, classname}
+\func{classname *}{wxDynamicCast}{ptr, classname}

 
 This macro returns the pointer {\it ptr} cast to the type {\it classname *} if
 
 This macro returns the pointer {\it ptr} cast to the type {\it classname *} if

-the pointer is of this type (the check is done during the run-time) or NULL
-otherwise. Usage of this macro is preferred over obsoleted wxObject::IsKindOf()
-function.
+the pointer is of this type (the check is done during the run-time) or
+{\tt NULL} otherwise. Usage of this macro is preferred over obsoleted
+wxObject::IsKindOf() function.

 
 

-The {\it ptr} argument may be NULL, in which case NULL will be returned.
+The {\it ptr} argument may be {\tt NULL}, in which case {\tt NULL} will be
+returned.

 
 Example:
 
 
 Example:
 


@@ -2392,9 +2533,23 @@ Example:
 \wxheading{See also}
 
 \helpref{RTTI overview}{runtimeclassoverview}\\
 \wxheading{See also}
 
 \helpref{RTTI overview}{runtimeclassoverview}\\

+\helpref{wxDynamicCastThis}{wxdynamiccastthis}\\

 \helpref{wxConstCast}{wxconstcast}\\
 \helpref{wxStatiicCast}{wxstaticcast}
 
 \helpref{wxConstCast}{wxconstcast}\\
 \helpref{wxStatiicCast}{wxstaticcast}
 

+\membersection{wxDynamicCastThis}\label{wxdynamiccastthis}
+
+\func{classname *}{wxDynamicCastThis}{classname}
+
+This macro is equivalent to {\tt wxDynamicCast(this, classname)} but the
+latter provokes spurious compilation warnings from some compilers (because it
+tests whether {\tt this} pointer is non {\tt NULL} which is always true), so
+this macro should be used to avoid them.
+
+\wxheading{See also}
+
+\helpref{wxDynamicCast}{wxdynamiccast}
+

 \membersection{wxICON}\label{wxiconmacro}
 
 \func{}{wxICON}{iconName}
 \membersection{wxICON}\label{wxiconmacro}
 
 \func{}{wxICON}{iconName}


@@ -2414,7 +2569,7 @@ avoid using {\tt \#ifdef}s when creating icons.
 
 \membersection{wxStaticCast}\label{wxstaticcast}
 
 
 \membersection{wxStaticCast}\label{wxstaticcast}
 

-\func{}{wxStaticCast}{ptr, classname}
+\func{classname *}{wxStaticCast}{ptr, classname}

 
 This macro checks that the cast is valid in debug mode (an assert failure will
 result if {\tt wxDynamicCast(ptr, classname) == NULL}) and then returns the
 
 This macro checks that the cast is valid in debug mode (an assert failure will
 result if {\tt wxDynamicCast(ptr, classname) == NULL}) and then returns the


@@ -2477,7 +2632,7 @@ loading from resource data.
 \func{bool}{wxResourceAddIdentifier}{\param{const wxString\& }{name}, \param{int }{value}}
 
 Used for associating a name with an integer identifier (equivalent to dynamically\rtfsp
 \func{bool}{wxResourceAddIdentifier}{\param{const wxString\& }{name}, \param{int }{value}}
 
 Used for associating a name with an integer identifier (equivalent to dynamically\rtfsp

-\verb$#$defining a name to an integer). Unlikely to be used by an application except
+\tt{#}defining a name to an integer). Unlikely to be used by an application except

 perhaps for implementing resource functionality for interpreted languages.
 
 \membersection{::wxResourceClear}
 perhaps for implementing resource functionality for interpreted languages.
 
 \membersection{::wxResourceClear}


@@ -2643,7 +2798,7 @@ load an entire {\tt .wxr file} into a string.
 
 \func{bool}{wxResourceRegisterBitmapData}{\param{const wxString\& }{name}, \param{char** }{xpm\_data}}
 
 
 \func{bool}{wxResourceRegisterBitmapData}{\param{const wxString\& }{name}, \param{char** }{xpm\_data}}
 

-Makes \verb$#$included XBM or XPM bitmap data known to the wxWindows resource system.
+Makes \tt{#}included XBM or XPM bitmap data known to the wxWindows resource system.

 This is required if other resources will use the bitmap data, since otherwise there
 is no connection between names used in resources, and the global bitmap data.
 
 This is required if other resources will use the bitmap data, since otherwise there
 is no connection between names used in resources, and the global bitmap data.