+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% Name: log.tex
+%% Purpose: wxLog and related classes documentation
+%% Author: Vadim Zeitlin
+%% Modified by:
+%% Created: some time ago
+%% RCS-ID: $Id$
+%% Copyright: (c) 1997-2001 Vadim Zeitlin
+%% License: wxWindows license
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
\section{\class{wxLog}}\label{wxlog}
-wxLog class defines the interface for the {\it log targets} used by wxWindows
+wxLog class defines the interface for the {\it log targets} used by wxWidgets
logging functions as explained in the \helpref{wxLog overview}{wxlogoverview}.
The only situations when you need to directly use this class is when you want
to derive your own log target because the existing ones don't satisfy your
Otherwise, it is completely hidden behind the {\it wxLogXXX()} functions and
you may not even know about its existence.
-See \helpref{log overview}{wxlogoverview} for the descriptions of wxWindows
+See \helpref{log overview}{wxlogoverview} for the descriptions of wxWidgets
logging facilities.
\wxheading{Derived from}
\latexignore{\rtfignore{\wxheading{Function groups}}}
-\membersection{Static functions}
+\membersection{Global functions}
The functions in this section work with and manipulate the active log target.
-The {\it OnLog()} is called by the {\it wxLogXXX()} functions and invokes the
-{\it DoLog()} of the active log target if any. Get/Set methods are used to
-install/query the current active target and, finally, {\it
-DontCreateOnDemand()} disables the automatic creation of a standard log target
-if none actually exists. It is only useful when the application is terminating
-and shouldn't be used in other situations because it may easily lead to a loss
-of messages.
+The \helpref{OnLog()}{wxlogonlog} is called by the {\it wxLogXXX()} functions
+and invokes the \helpref{DoLog()}{wxlogdolog} of the active log target if any.
+Get/Set methods are used to install/query the current active target and,
+finally, \helpref{DontCreateOnDemand()}{wxlogdontcreateondemand} disables the
+automatic creation of a standard log target if none actually exists. It is
+only useful when the application is terminating and shouldn't be used in other
+situations because it may easily lead to a loss of messages.
\helpref{OnLog}{wxlogonlog}\\
\helpref{GetActiveTarget}{wxloggetactivetarget}\\
\helpref{SetActiveTarget}{wxlogsetactivetarget}\\
-\helpref{DontCreateOnDemand}{wxlogdontcreateondemand}
-
-\membersection{Message buffering}
-
-Some of wxLog implementations, most notably the standard
-wxLogGui class, buffer the messages (for example, to avoid
-showing the user a zillion of modal message boxes one after another - which
-would be really annoying). {\it Flush()} shows them all and clears the buffer
-contents. Although this function doesn't do anything if the buffer is already
-empty, {\it HasPendingMessages()} is also provided which allows to explicitly
-verify it.
+\helpref{DontCreateOnDemand}{wxlogdontcreateondemand}\\
+\helpref{Suspend}{wxlogsuspend}\\
+\helpref{Resume}{wxlogresume}
+
+\membersection{Logging functions}\label{loggingfunctions}
+
+There are two functions which must be implemented by any derived class to
+actually process the log messages: \helpref{DoLog}{wxlogdolog} and
+\helpref{DoLogString}{wxlogdologstring}. The second function receives a string
+which just has to be output in some way and the easiest way to write a new log
+target is to override just this function in the derived class. If more control
+over the output format is needed, then the first function must be overridden
+which allows to construct custom messages depending on the log level or even
+do completely different things depending on the message severity (for example,
+throw away all messages except warnings and errors, show warnings on the
+screen and forward the error messages to the user's (or programmer's) cell
+phone - maybe depending on whether the timestamp tells us if it is day or
+night in the current time zone).
+
+There also functions to support message buffering. Why are they needed?
+Some of wxLog implementations, most notably the standard wxLogGui class,
+buffer the messages (for example, to avoid showing the user a zillion of modal
+message boxes one after another -- which would be really annoying).
+\helpref{Flush()}{wxlogflush} shows them all and clears the buffer contents.
+This function doesn't do anything if the buffer is already empty.
\helpref{Flush}{wxlogflush}\\
-\helpref{FlushActive}{wxlogflushactive}\\
-\helpref{HasPendingMessages}{haspendingmessages}
+\helpref{FlushActive}{wxlogflushactive}
\membersection{Customization}\label{wxlogcustomization}
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
-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,
+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.
+
+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}
-wxLogTrace(wxTraceRefCount | wxTraceOle, "Active object ref count: %d", nRef);
+// 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 wxTraceRefCount
-and wxTraceOle.
+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(wxTRACE_OleCalls, "IFoo::Bar() called");
+\end{verbatim}
+
+will log the message if it was preceded by
+
+\begin{verbatim}
+wxLog::AddTraceMask(wxTRACE_OleCalls);
+\end{verbatim}
+
+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
-any string with \% specificators fully described in the documentation of the
+any string with \% specifications fully described in the documentation of the
standard {\it strftime()} function. For example, the default format is
"[\%d/\%b/\%y \%H:\%M:\%S] " which gives something like "[17/Sep/98 22:10:16] "
(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{ClearTraceMasks}{wxlogcleartracemasks}\\
+\helpref{GetTraceMasks}{wxloggettracemasks}\\
+\helpref{IsAllowedTraceMask}{wxlogisallowedtracemask}\\
\helpref{SetVerbose}{wxlogsetverbose}\\
\helpref{GetVerbose}{wxloggetverbose}\\
\helpref{SetTimestamp}{wxlogsettimestamp}\\
\helpref{GetTimestamp}{wxloggettimestamp}\\
\helpref{SetTraceMask}{wxlogsettracemask}\\
-\helpref{GetTraceMask}{wxloggettracemask}
+\helpref{GetTraceMask}{wxloggettracemask}\\
+\helpref{SetRepetitionCounting}{wxlogsetrepetitioncounting}\\
+\helpref{GetRepetitionCounting}{wxloggetrepetitioncounting}
%%%%% MEMBERS HERE %%%%%
\helponly{\insertatlevel{2}{
}}
+\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}.
+
+\wxheading{See also}
+
+\helpref{RemoveTraceMask}{wxlogremovetracemask}
+\helpref{GetTraceMasks}{wxloggettracemasks}
+
+\membersection{wxLog::ClearTraceMasks}\label{wxlogcleartracemasks}
+
+\func{static void}{ClearTraceMasks}{\void}
+
+Removes all trace masks previously set with
+\helpref{AddTraceMask}{wxlogaddtracemask}.
+
+\wxheading{See also}
+
+\helpref{RemoveTraceMask}{wxlogremovetracemask}
+
+\membersection{wxLog::GetTraceMasks}\label{wxloggettracemasks}
+
+\func{static const wxArrayString \&}{GetTraceMasks}{\void}
+
+Returns the currently allowed list of string trace masks.
+
+\wxheading{See also}
+
+\helpref{AddTraceMask}{wxlogaddtracemask}.
+
\membersection{wxLog::OnLog}\label{wxlogonlog}
-\func{static void}{OnLog}{\param{wxLogLevel }{ level}, \param{const char * }{ message}}
+\func{static void}{OnLog}{\param{wxLogLevel }{ level}, \param{const wxString\& }{ message}}
Forwards the message at specified level to the {\it DoLog()} function of the
active log target if there is any, does nothing otherwise.
\func{static wxLog *}{SetActiveTarget}{\param{wxLog * }{ logtarget}}
Sets the specified log target as the active one. Returns the pointer to the
-previous active log target (may be NULL).
+previous active log target (may be NULL). To suppress logging use a new
+instance of wxLogNull not NULL. If the active log target is set to NULL a
+new default log target will be created when logging occurs.
+
+\membersection{wxLog::Suspend}\label{wxlogsuspend}
+
+\func{static void}{Suspend}{\void}
+
+Suspends the logging until \helpref{Resume}{wxlogresume} is called. Note that
+the latter must be called the same number of times as the former to undo it,
+i.e. if you call Suspend() twice you must call Resume() twice as well.
+
+Note that suspending the logging means that the log sink won't be be flushed
+periodically, it doesn't have any effect if the current log target does the
+logging immediately without waiting for \helpref{Flush}{wxlogflush} to be
+called (the standard GUI log target only shows the log dialog when it is
+flushed, so Suspend() works as expected with it).
+
+\wxheading{See also}
+
+\helpref{Resume}{wxlogresume},\\
+\helpref{wxLogNull}{wxlogoverview}
+
+\membersection{wxLog::Resume}\label{wxlogresume}
+
+\func{static void}{Resume}{\void}
+
+Resumes logging previously suspended by a call to
+\helpref{Suspend}{wxlogsuspend}. All messages logged in the meanwhile will be
+flushed soon.
+
+\membersection{wxLog::DoLog}\label{wxlogdolog}
+
+\func{virtual void}{DoLog}{\param{wxLogLevel }{level}, \param{const wxString\& }{msg}, \param{time\_t }{timestamp}}
+
+Called to process the message of the specified severity. {\it msg} is the text
+of the message as specified in the call of {\it wxLogXXX()} function which
+generated it and {\it timestamp} is the moment when the message was generated.
+
+The base class version prepends the timestamp to the message, adds a prefix
+corresponding to the log level and then calls
+\helpref{DoLogString}{wxlogdologstring} with the resulting string.
+
+\membersection{wxLog::DoLogString}\label{wxlogdologstring}
+
+\func{virtual void}{DoLogString}{\param{const wxString\& }{msg}, \param{time\_t }{timestamp}}
+
+Called to log the specified string. The timestamp is already included in the
+string but still passed to this function.
+
+A simple implementation may just send the string to {\tt stdout} or, better,
+{\tt stderr}.
\membersection{wxLog::DontCreateOnDemand}\label{wxlogdontcreateondemand}
\func{static void}{DontCreateOnDemand}{\void}
Instructs wxLog to not create new log targets on the fly if there is none
-currently. (Almost) for internal use only.
+currently. (Almost) for internal use only: it is supposed to be called by the
+application shutdown code.
+
+Note that this function also calls
+\helpref{ClearTraceMasks}{wxlogcleartracemasks}.
\membersection{wxLog::Flush}\label{wxlogflush}
Flushes the current log target if any, does nothing if there is none.
-See also:
+\wxheading{See also}
\helpref{Flush}{wxlogflush}
-\membersection{wxLog::HasPendingMessages}\label{haspendingmessages}
-
-\constfunc{bool}{HasPendingMessages}{\void}
-
-Returns true if there are any messages in the buffer (not yet shown to the
-user). (Almost) for internal use only.
-
\membersection{wxLog::SetVerbose}\label{wxlogsetverbose}
-\func{void}{SetVerbose}{\param{bool }{ verbose = TRUE}}
+\func{static void}{SetVerbose}{\param{bool }{ verbose = true}}
-Activates or desactivates verbose mode in which the verbose messages are
+Activates or deactivates verbose mode in which the verbose messages are
logged as the normal ones instead of being silently dropped.
\membersection{wxLog::GetVerbose}\label{wxloggetverbose}
-\constfunc{bool}{GetVerbose}{\void}
+\func{static bool}{GetVerbose}{\void}
Returns whether the verbose mode is currently active.
+\membersection{wxLog::SetLogLevel}\label{wxlogsetloglevel}
+
+\func{static void}{SetLogLevel}{\param{wxLogLevel }{ logLevel}}
+
+Specifies that log messages with $level > logLevel$ should be ignored
+and not sent to the active log target.
+
+\membersection{wxLog::GetLogLevel}\label{wxloggetloglevel}
+
+\func{static wxLogLevel}{GetLogLevel}{\void}
+
+Returns the current log level limit.
+
+\membersection{wxLog::SetRepetitionCounting}\label{wxlogsetrepetitioncounting}
+
+\func{static void}{SetRepetitionCounting}{\param{bool }{ repetCounting = true}}
+
+Enables logging mode in which a log message is logged once, and in case exactly
+the same message successively repeats one or more times, only the number of
+repetitions is logged.
+
+\membersection{wxLog::GetRepetitionCounting}\label{wxloggetrepetitioncounting}
+
+\func{static bool}{GetRepetitionCounting}{\void}
+
+Returns whether the repetition counting mode is enabled.
+
+
\membersection{wxLog::SetTimestamp}\label{wxlogsettimestamp}
-\func{void}{SetTimestamp}{\param{const char * }{ format}}
+\func{void}{SetTimestamp}{\param{const wxStrgin\&}{ format}}
Sets the timestamp format prepended by the default log targets to all
messages. The string may contain any normal characters as well as \%
\membersection{wxLog::GetTimestamp}\label{wxloggettimestamp}
-\constfunc{const char *}{GetTimestamp}{\void}
+\constfunc{const wxString\&}{GetTimestamp}{\void}
Returns the current timestamp format string.
Returns the current trace mask, see \helpref{Customization}{wxlogcustomization} section
for details.
+\membersection{wxLog::IsAllowedTraceMask}\label{wxlogisallowedtracemask}
+
+\func{static bool}{IsAllowedTraceMask}{\param{const wxString\& }{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}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% wxLogChain %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\section{\class{wxLogChain}}\label{wxlogchain}
+
+This simple class allows to chain log sinks, that is to install a new sink but
+keep passing log messages to the old one instead of replacing it completely as
+\helpref{SetActiveTarget}{wxlogsetactivetarget} does.
+
+It is especially useful when you want to divert the logs somewhere (for
+example to a file or a log window) but also keep showing the error messages
+using the standard dialogs as \helpref{wxLogGui}{wxlogoverview} does by default.
+
+Example of usage:
+
+\begin{verbatim}
+wxLogChain *logChain = new wxLogChain(new wxLogStderr);
+
+// all the log messages are sent to stderr and also processed as usually
+...
+
+// don't delete logChain directly as this would leave a dangling
+// pointer as active log target, use SetActiveTarget() instead
+delete wxLog::SetActiveTarget(...something else or NULL...);
+
+\end{verbatim}
+
+\wxheading{Derived from}
+
+\helpref{wxLog}{wxlog}
+
+\wxheading{Include files}
+
+<wx/log.h>
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxLogChain::wxLogChain}\label{wxlogchainctor}
+
+\func{}{wxLogChain}{\param{wxLog *}{logger}}
+
+Sets the specified {\tt logger} (which may be {\tt NULL}) as the default log
+target but the log messages are also passed to the previous log target if any.
+
+\membersection{wxLogChain::\destruct{wxLogChain}}\label{wxlogchaindtor}
+
+\func{}{\destruct{wxLogChain}}{\void}
+
+Destroys the previous log target.
+
+\membersection{wxLogChain::DetachOldLog}\label{wxlogchaindetacholdlog}
+
+\func{void}{DetachOldLog}{\void}
+
+Detaches the old log target so it won't be destroyed when the wxLogChain object
+is destroyed.
+
+\membersection{wxLogChain::GetOldLog}\label{wxlogchaingetoldlog}
+
+\constfunc{wxLog *}{GetOldLog}{\void}
+
+Returns the pointer to the previously active log target (which may be {\tt
+NULL}).
+
+\membersection{wxLogChain::IsPassingMessages}\label{wxlogchainispassingmessages}
+
+\constfunc{bool}{IsPassingMessages}{\void}
+
+Returns {\tt true} if the messages are passed to the previously active log
+target (default) or {\tt false} if \helpref{PassMessages}{wxlogchainpassmessages}
+had been called.
+
+\membersection{wxLogChain::PassMessages}\label{wxlogchainpassmessages}
+
+\func{void}{PassMessages}{\param{bool }{passMessages}}
+
+By default, the log messages are passed to the previously active log target.
+Calling this function with {\tt false} parameter disables this behaviour
+(presumably temporarily, as you shouldn't use wxLogChain at all otherwise) and
+it can be reenabled by calling it again with {\it passMessages} set to {\tt
+true}.
+
+\membersection{wxLogChain::SetLog}\label{wxlogchainsetlog}
+
+\func{void}{SetLog}{\param{wxLog *}{logger}}
+
+Sets another log target to use (may be {\tt NULL}). The log target specified
+in the \helpref{constructor}{wxlogchainctor} or in a previous call to
+this function is deleted.
+
+This doesn't change the old log target value (the one the messages are
+forwarded to) which still remains the same as was active when wxLogChain
+object was created.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% wxLogGui %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\section{\class{wxLogGui}}\label{wxloggui}
+
+This is the default log target for the GUI wxWidgets applications. It is passed
+to \helpref{wxLog::SetActiveTarget}{wxlogsetactivetarget} at the program
+startup and is deleted by wxWidgets during the program shut down.
+
+\wxheading{Derived from}
+
+\helpref{wxLog}{wxlog}
+
+\wxheading{Include files}
+
+<wx/log.h>
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxLogGui::wxLogGui}\label{wxlogguictor}
+
+\func{}{wxLogGui}{\void}
+
+Default constructor.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% wxLogNull %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\section{\class{wxLogNull}}\label{wxlognull}
+
+This class allows to temporarily suspend logging. All calls to the log
+functions during the life time of an object of this class are just ignored.
+
+In particular, it can be used to suppress the log messages given by wxWidgets
+itself but it should be noted that it is rarely the best way to cope with this
+problem as {\bf all} log messages are suppressed, even if they indicate a
+completely different error than the one the programmer wanted to suppress.
+
+For instance, the example of the overview:
+
+{\small
+\begin{verbatim}
+ wxFile file;
+
+ // wxFile.Open() normally complains if file can't be opened, we don't want it
+ {
+ wxLogNull logNo;
+ if ( !file.Open("bar") )
+ ... process error ourselves ...
+ } // ~wxLogNull called, old log sink restored
+
+ wxLogMessage("..."); // ok
+\end{verbatim}
+}%
+
+would be better written as:
+
+{\small
+\begin{verbatim}
+ wxFile file;
+
+ // don't try to open file if it doesn't exist, we are prepared to deal with
+ // this ourselves - but all other errors are not expected
+ if ( wxFile::Exists("bar") )
+ {
+ // gives an error message if the file couldn't be opened
+ file.Open("bar");
+ }
+ else
+ {
+ ...
+ }
+\end{verbatim}
+}%
+
+\wxheading{Derived from}
+
+\helpref{wxLog}{wxlog}
+
+\wxheading{Include files}
+
+<wx/log.h>
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxLogNull::wxLogNull}\label{wxlognullctor}
+
+\func{}{wxLogNull}{\void}
+
+Suspends logging.
+
+\membersection{wxLogNull::\destruct{wxLogNull}}\label{wxlognulldtor}
+
+Resumes logging.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% wxLogInterposer %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\section{\class{wxLogInterposer}}\label{wxloginterposer}
+
+A special version of \helpref{wxLogChain}{wxlogchain} which uses itself as the
+new log target. It forwards log messages to the previously installed one in addition to
+processing them itself.
+
+Unlike \helpref{wxLogChain}{wxlogchain} which is usually used directly as is,
+this class must be derived from to implement \helpref{DoLog}{wxlogdolog}
+and/or \helpref{DoLogString}{wxlogdologstring} methods.
+
+wxLogInterposer destroys the previous log target in its destructor. If you
+don't want this to happen, use wxLogInterposerTemp instead.
+
+\wxheading{Derived from}
+
+\helpref{wxLogChain}{wxlogchain}
+
+\wxheading{Include files}
+
+<wx/log.h>
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxLogInterposer::wxLogInterposer}\label{wxloginterposerctor}
+
+The default constructor installs this object as the current active log target.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% wxLogInterposerTemp %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\section{\class{wxLogInterposerTemp}}\label{wxloginterposertemp}
+
+A special version of \helpref{wxLogChain}{wxlogchain} which uses itself as the
+new log target. It forwards log messages to the previously installed one in addition to
+processing them itself. Unlike \helpref{wxLogInterposer}{wxloginterposer}, it doesn't
+delete the old target which means it can be used to temporarily redirect log output.
+
+As per wxLogInterposer, this class must be derived from to implement \helpref{DoLog}{wxlogdolog}
+and/or \helpref{DoLogString}{wxlogdologstring} methods.
+
+\wxheading{Derived from}
+
+\helpref{wxLogChain}{wxlogchain}
+
+\wxheading{Include files}
+
+<wx/log.h>
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxLogInterposerTemp::wxLogInterposerTemp}\label{wxloginterposertempctor}
+
+The default constructor installs this object as the current active log target.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% wxLogStderr %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\section{\class{wxLogStderr}}\label{wxlogstderr}
+
+This class can be used to redirect the log messages to a C file stream (not to
+be confused with C++ streams). It is the default log target for the non-GUI
+wxWidgets applications which send all the output to {\tt stderr}.
+
+\wxheading{Derived from}
+
+\helpref{wxLog}{wxlog}
+
+\wxheading{Include files}
+
+<wx/log.h>
+
+\wxheading{See also}
+
+\helpref{wxLogStream}{wxlogstream}
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxLogStderr::wxLogStderr}\label{wxlogstderrctor}
+
+\func{}{wxLogStderr}{\param{FILE }{*fp = NULL}}
+
+Constructs a log target which sends all the log messages to the given
+{\tt FILE}. If it is {\tt NULL}, the messages are sent to {\tt stderr}.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% wxLogStream %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\section{\class{wxLogStream}}\label{wxlogstream}
+
+This class can be used to redirect the log messages to a C++ stream.
+
+Please note that this class is only available if wxWidgets was compiled with
+the standard iostream library support ({\tt wxUSE\_STD\_IOSTREAM} must be on).
+
+\wxheading{Derived from}
+
+\helpref{wxLog}{wxlog}
+
+\wxheading{Include files}
+
+<wx/log.h>
+
+\wxheading{See also}
+
+\helpref{wxLogStderr}{wxlogstderr},\\
+\helpref{wxStreamToTextRedirector}{wxstreamtotextredirector}
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxLogStream::wxLogStream}\label{wxlogstreamctor}
+
+\func{}{wxLogStream}{\param{std::ostream }{*ostr = NULL}}
+
+Constructs a log target which sends all the log messages to the given
+output stream. If it is {\tt NULL}, the messages are sent to {\tt cerr}.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% wxLogTextCtrl %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\section{\class{wxLogTextCtrl}}\label{wxlogtextctrl}
+
+Using these target all the log messages can be redirected to a text control.
+The text control must have been created with {\tt wxTE\_MULTILINE} style by the
+caller previously.
+
+\wxheading{Derived from}
+
+\helpref{wxLog}{wxlog}
+
+\wxheading{Include files}
+
+<wx/log.h>
+
+\wxheading{See also}
+
+\helpref{wxTextCtrl}{wxtextctrl},\\
+\helpref{wxStreamToTextRedirector}{wxstreamtotextredirector}
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxLogTextCtrl::wxLogTextCtrl}\label{wxlogtextctrlctor}
+
+\func{}{wxLogTextCtrl}{\param{wxTextCtrl }{*textctrl}}
+
+Constructs a log target which sends all the log messages to the given text
+control. The {\it textctrl} parameter cannot be {\tt NULL}.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% wxLogWindow %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\section{\class{wxLogWindow}}\label{wxlogwindow}
+
+This class represents a background log window: to be precise, it collects all
+log messages in the log frame which it manages but also passes them on to the
+log target which was active at the moment of its creation. This allows, for
+example, to show all the log messages in a frame but still continue to process
+them normally by showing the standard log dialog.
+
+\wxheading{Derived from}
+
+\helpref{wxLogInterposer}{wxloginterposer}
+
+\wxheading{Include files}
+
+<wx/log.h>
+
+\wxheading{See also}
+
+\helpref{wxLogTextCtrl}{wxlogtextctrl}
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxLogWindow::wxLogWindow}\label{wxlogwindowctor}
+
+\func{}{wxLogWindow}{\param{wxFrame }{*parent}, \param{const wxChar }{*title}, \param{bool }{show = {\tt true}}, \param{bool }{passToOld = {\tt true}}}
+
+Creates the log frame window and starts collecting the messages in it.
+
+\wxheading{Parameters}
+
+\docparam{parent}{The parent window for the log frame, may be {\tt NULL}}
+
+\docparam{title}{The title for the log frame}
+
+\docparam{show}{{\tt true} to show the frame initially (default), otherwise
+\helpref{wxLogWindow::Show}{wxlogwindowshow} must be called later.}
+
+\docparam{passToOld}{{\tt true} to process the log messages normally in addition to
+logging them in the log frame (default), {\tt false} to only log them in the
+log frame.}
+
+\membersection{wxLogWindow::Show}\label{wxlogwindowshow}
+
+\func{void}{Show}{\param{bool }{show = {\tt true}}}
+
+Shows or hides the frame.
+
+\membersection{wxLogWindow::GetFrame}\label{wxlogwindowgetframe}
+
+\constfunc{wxFrame *}{GetFrame}{\void}
+
+Returns the associated log frame window. This may be used to position or resize
+it but use \helpref{wxLogWindow::Show}{wxlogwindowshow} to show or hide it.
+
+\membersection{wxLogWindow::OnFrameCreate}\label{wxlogwindowonframecreate}
+
+\func{virtual void}{OnFrameCreate}{\param{wxFrame }{*frame}}
+
+Called immediately after the log frame creation allowing for
+any extra initializations.
+
+\membersection{wxLogWindow::OnFrameClose}\label{wxlogwindowonframeclose}
+
+\func{virtual bool}{OnFrameClose}{\param{wxFrame }{*frame}}
+
+Called if the user closes the window interactively, will not be
+called if it is destroyed for another reason (such as when program
+exits).
+
+Return {\tt true} from here to allow the frame to close, {\tt false} to
+prevent this from happening.
+
+\wxheading{See also}
+
+\helpref{wxLogWindow::OnFrameDelete}{wxlogwindowonframedelete}
+
+\membersection{wxLogWindow::OnFrameDelete}\label{wxlogwindowonframedelete}
+
+\func{virtual void}{OnFrameDelete}{\param{wxFrame }{*frame}}
+
+Called right before the log frame is going to be deleted: will
+always be called unlike \helpref{OnFrameClose()}{wxlogwindowonframeclose}.
+
projects / wxWidgets.git / blobdiff