wxLogTrace documentation updated and expanded, VC++ users note added

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4612 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/docs/latex/wx/log.tex b/docs/latex/wx/log.tex
index 0e2604ace66b3a0d81e571a83a306656aeebbbd6..3c8d763200536ea7337cc5284c182bcbf214780d 100644 (file)
--- a/docs/latex/wx/log.tex
+++ b/docs/latex/wx/log.tex
@@ -62,30 +62,45 @@ without writing a new log target class (which, aside of being a matter of
 several minutes, allows you to do anything you want).
 
 The verbose messages are the trace messages which are not disabled in the
 several minutes, allows you to do anything you want).
 
 The verbose messages are the trace messages which are not disabled in the

-release mode and are generated by {\it wxLogVerbose()}. They are not normally
+release mode and are generated by \helpref{wxLogVerbose}{wxlogverbose}. They are not normally

 shown to the user because they present little interest, but may be activated,
 for example, in order to help the user find some program problem.
 
 shown to the user because they present little interest, but may be activated,
 for example, in order to help the user find some program problem.
 

-As for the (real) trace messages, they come in different kinds:
-
-\begin{itemize}\itemsep=0pt
-\item{wxTraceMemAlloc} for the messages about creating and deleting objects
-\item{wxTraceMessages} for tracing the windowing system messages/events
-\item{wxTraceResAlloc} for allocating and releasing the system ressources
-\item{wxTraceRefCount} for reference counting related messages
-\item{wxTraceOleCalls} for the OLE (or COM) method invocations (wxMSW only)
-\item{other} the remaining bits are free for user-defined trace levels
-\end{itemize}
-
-The trace mask is a bit mask which tells which (if any) of these trace
-messages are going to be actually logged. For the trace message to appear
-somewhere, all the bits in the mask used in the call to {\it wxLogTrace()} 
-function must be set in the current trace mask. For example,
+As for the (real) trace messages, their handling depends on the settings of
+the (application global) {\it trace mask}. There are two ways to specify it:
+either by using helpref{SetTraceMask}{wxlogsettracemask} and 
+\helpref{GetTraceMask}{wxloggettracemask} and using 
+\helpref{wxLogTrace}{wxlogtrace} which takes an integer mask or by using 
+\helpref{AddTraceMask}{wxlogaddtracemask} for string trace masks.
+
+The difference between bit-wise and string trace masks is that a message using
+integer trace mask will only be logged if all bits of the mask are set in the
+current mask while a message using string mask will be logged simply if the
+mask had been added before to the list of allowed ones.
+
+For example,
+\begin{verbatim}
+// wxTraceOleCalls is one of standard bit masks
+wxLogTrace(wxTraceRefCount | wxTraceOleCalls, "Active object ref count: %d", nRef);
+\end{verbatim}
+will do something only if the current trace mask contains both 
+{\tt wxTraceRefCount} and {\tt wxTraceOle}, but
+\begin{verbatim}
+// wxTRACE_OleCalls is one of standard string masks
+wxLogTrace(wxTACE_OleCalls, "IFoo::Bar() called");
+\end{verbatim}
+will log the message if it was preceded by

 \begin{verbatim}
 \begin{verbatim}

-wxLogTrace(wxTraceRefCount | wxTraceOle, "Active object ref count: %d", nRef);
+wxLog::AddTraceMask(wxTRACE_OleCalls);

 \end{verbatim}
 \end{verbatim}

-will do something only if the current trace mask contains both wxTraceRefCount
-and wxTraceOle.
+
+Using string masks is simpler and allows to easily add custom ones, so this is
+the preferred way of working with trace messages. The integer trace mask is
+kept for compatibility and for additional (but very rarely needed) flexibility
+only.
+
+The standard trace masks are given in \helpref{wxLogTrace}{wxlogtrace} 
+documentation.

 
 Finally, the {\it wxLog::DoLog()} function automatically prepends a time stamp
 to all the messages. The format of the time stamp may be changed: it can be
 
 Finally, the {\it wxLog::DoLog()} function automatically prepends a time stamp
 to all the messages. The format of the time stamp may be changed: it can be


@@ -95,6 +110,15 @@ standard {\it strftime()} function. For example, the default format is
 (without quotes) for the current date. Setting an empty string as the time
 format disables timestamping of the messages completely.
 
 (without quotes) for the current date. Setting an empty string as the time
 format disables timestamping of the messages completely.
 

+{\bf NB:} Timestamping is disabled for Visual C++ users in debug builds by
+default because otherwise it would be impossible to directly go to the line
+from which the log message was generated by simply clicking in the debugger
+window on the corresponding error message. If you wish to enable it, please use 
+\helpref{SetTimestamp}{wxlogsettimestamp} explicitly.
+
+\helpref{AddTraceMask}{wxlogaddtracemask}\\
+\helpref{RemoveTraceMask}{wxlogremovetracemask}\\
+\helpref{IsAllowedTraceMask}{wxlogisallowedtracemask}\\

 \helpref{SetVerbose}{wxlogsetverbose}\\
 \helpref{GetVerbose}{wxloggetverbose}\\
 \helpref{SetTimestamp}{wxlogsettimestamp}\\
 \helpref{SetVerbose}{wxlogsetverbose}\\
 \helpref{GetVerbose}{wxloggetverbose}\\
 \helpref{SetTimestamp}{wxlogsettimestamp}\\


@@ -109,6 +133,15 @@ format disables timestamping of the messages completely.
 
 }}
 
 
 }}
 

+\membersection{wxLog::AddTraceMask}\label{wxlogaddtracemask}
+
+\func{static void}{AddTraceMask}{\param{const wxString\& }{mask}}
+
+Add the {\it mask} to the list of allowed masks for 
+\helpref{wxLogTrace}{wxlogtrace}.
+
+See also: \helpref{RemoveTraceMask}{wxlogremovetracemask}
+

 \membersection{wxLog::OnLog}\label{wxlogonlog}
 
 \func{static void}{OnLog}{\param{wxLogLevel }{ level}, \param{const char * }{ message}}
 \membersection{wxLog::OnLog}\label{wxlogonlog}
 
 \func{static void}{OnLog}{\param{wxLogLevel }{ level}, \param{const char * }{ message}}


@@ -200,3 +233,22 @@ section for details.
 Returns the current trace mask, see \helpref{Customization}{wxlogcustomization} section
 for details.
 
 Returns the current trace mask, see \helpref{Customization}{wxlogcustomization} section
 for details.
 

+\membersection{wxLog::IsAllowedTraceMask}\label{wxlogisallowedtracemask}
+
+\func{static bool}{IsAllowedTraceMask}{\param{const wxChar *}{mask}}
+
+Returns TRUE if the {\it mask} is one of allowed masks for 
+\helpref{wxLogTrace}{wxlogtrace}.
+
+See also: \helpref{AddTraceMask}{wxlogaddtracemask}, 
+\helpref{RemoveTraceMask}{wxlogremovetracemask}
+
+\membersection{wxLog::RemoveTraceMask}\label{wxlogremovetracemask}
+
+\func{static void}{RemoveTraceMask}{\param{const wxString\& }{mask}}
+
+Remove the {\it mask} from the list of allowed masks for 
+\helpref{wxLogTrace}{wxlogtrace}.
+
+See also: \helpref{AddTraceMask}{wxlogaddtracemask}
+