Implement wxCalendarCtrl::SetDateRange() in the native GTK version.

[wxWidgets.git] / interface / wx / log.h

diff --git a/interface/wx/log.h b/interface/wx/log.h
index c350ae8fcebf28ddbc167a55b4bd20f688d86052..26f9180ce0c073fd6d4aaa923d4344bce7551e71 100644 (file)
--- a/interface/wx/log.h
+++ b/interface/wx/log.h
@@ -1,11 +1,73 @@
 /////////////////////////////////////////////////////////////////////////////
 // Name:        log.h
 /////////////////////////////////////////////////////////////////////////////
 // Name:        log.h

-// Purpose:     interface of wxLogWindow
+// Purpose:     interface of wxLog* classes

 // Author:      wxWidgets team
 // RCS-ID:      $Id$
 // Author:      wxWidgets team
 // RCS-ID:      $Id$

-// Licence:     wxWindows license
+// Licence:     wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 /////////////////////////////////////////////////////////////////////////////
 

+
+/**
+    Different standard log levels (you may also define your own) used with
+    by standard wxLog functions wxLogError(), wxLogWarning(), etc...
+*/
+enum wxLogLevelValues
+{
+    wxLOG_FatalError, //!< program can't continue, abort immediately
+    wxLOG_Error,      //!< a serious error, user must be informed about it
+    wxLOG_Warning,    //!< user is normally informed about it but may be ignored
+    wxLOG_Message,    //!< normal message (i.e. normal output of a non GUI app)
+    wxLOG_Status,     //!< informational: might go to the status line of GUI app
+    wxLOG_Info,       //!< informational message (a.k.a. 'Verbose')
+    wxLOG_Debug,      //!< never shown to the user, disabled in release mode
+    wxLOG_Trace,      //!< trace messages are also only enabled in debug mode
+    wxLOG_Progress,   //!< used for progress indicator (not yet)
+    wxLOG_User = 100, //!< user defined levels start here
+    wxLOG_Max = 10000
+};
+
+/**
+    The type used to specify a log level.
+
+    Default values of ::wxLogLevel used by wxWidgets are contained in the
+    ::wxLogLevelValues enumeration.
+*/
+typedef unsigned long wxLogLevel;
+
+/**
+    Information about a log record (unit of the log output).
+ */
+class wxLogRecordInfo
+{
+public:
+    /// The name of the file where this log message was generated.
+    const char *filename;
+
+    /// The line number at which this log message was generated.
+    int line;
+
+    /**
+        The name of the function where the log record was generated.
+
+        This field may be @NULL if the compiler doesn't support @c __FUNCTION__
+        (but most modern compilers do).
+     */
+    const char *func;
+
+    /// Time when the log message was generated.
+    time_t timestamp;
+
+    /**
+        Id of the thread in which the message was generated.
+
+        This field is only available if wxWidgets was built with threads
+        support (<code>wxUSE_THREADS == 1</code>).
+
+        @see wxThread::GetCurrentId()
+     */
+    wxThreadIdType threadId;
+};
+

 /**
     @class wxLogWindow
 
 /**
     @class wxLogWindow
 


@@ -26,17 +88,19 @@ public:
     /**
         Creates the log frame window and starts collecting the messages in it.
 
     /**
         Creates the log frame window and starts collecting the messages in it.
 

-        @param parent
+        @param pParent

             The parent window for the log frame, may be @NULL
             The parent window for the log frame, may be @NULL

-        @param title
+        @param szTitle

             The title for the log frame
         @param show
             @true to show the frame initially (default), otherwise
             Show() must be called later.
         @param passToOld
             The title for the log frame
         @param show
             @true to show the frame initially (default), otherwise
             Show() must be called later.
         @param passToOld

-            @true to process the log messages normally in addition to
-            logging them in the log frame (default), @false to only log them in the
-            log frame.
+            @true to process the log messages normally in addition to logging them 
+            in the log frame (default), @false to only log them in the log frame.
+            Note that if no targets were set using wxLog::SetActiveTarget() then 
+            wxLogWindow simply becomes the active one and messages won't be passed
+            to other targets.

     */
     wxLogWindow(wxWindow* pParent, const wxString& szTitle, bool show = true,
                 bool passToOld = true);
     */
     wxLogWindow(wxWindow* pParent, const wxString& szTitle, bool show = true,
                 bool passToOld = true);


@@ -396,7 +460,7 @@ public:
         Constructs a log target which sends all the log messages to the given
         output stream. If it is @NULL, the messages are sent to @c cerr.
     */
         Constructs a log target which sends all the log messages to the given
         output stream. If it is @NULL, the messages are sent to @c cerr.
     */

-    wxLogStream(std::ostream ostr = NULL);
+    wxLogStream(std::ostream *ostr = NULL);

 };
 
 
 };
 
 


@@ -405,8 +469,10 @@ public:
     @class wxLogStderr
 
     This class can be used to redirect the log messages to a C file stream (not to
     @class 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 @c stderr.
+    be confused with C++ streams).
+
+    It is the default log target for the non-GUI wxWidgets applications which
+    send all the output to @c stderr.

 
     @library{wxbase}
     @category{logging}
 
     @library{wxbase}
     @category{logging}


@@ -443,6 +509,11 @@ public:
 class wxLogBuffer : public wxLog
 {
 public:
 class wxLogBuffer : public wxLog
 {
 public:

+    /**
+        The default ctor does nothing.
+    */
+    wxLogBuffer();
+

     /**
         Shows all the messages collected so far to the user (using a message box in the
         GUI applications or by printing them out to the console in text mode) and
     /**
         Shows all the messages collected so far to the user (using a message box in the
         GUI applications or by printing them out to the console in text mode) and


@@ -515,153 +586,32 @@ public:
 /**
     @class wxLog
 
 /**
     @class wxLog
 

-    wxLog class defines the interface for the @e log targets used by wxWidgets
+    wxLog class defines the interface for the <em>log targets</em> used by wxWidgets

     logging functions as explained in the @ref overview_log.
     logging functions as explained in the @ref overview_log.

+    

     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
     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

-    needs. Another case is if you wish to customize the behaviour of the standard
-    logging classes (all of which respect the wxLog settings): for example, set
-    which trace messages are logged and which are not or change (or even remove
-    completely) the timestamp on the messages.
-
-    Otherwise, it is completely hidden behind the @e wxLogXXX() functions and
-    you may not even know about its existence.
-
-
-    @section log_derivingyours Deriving your own log target
-
-    There are two functions which must be implemented by any derived class to
-    actually process the log messages: DoLog() and DoLogString().
-    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).
-
-    Flush() shows them all and clears the buffer contents.
-    This function doesn't do anything if the buffer is already empty.
-
-    See also:
-    @li Flush()
-    @li FlushActive()
-
-
-    @section log_tracemasks Using trace masks
-
-    The functions below allow some limited customization of wxLog behaviour
-    without writing a new log target class (which, aside from 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
-    release mode and are generated by 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) @e trace mask which can either be specified using
-    SetTraceMask(), GetTraceMask() and wxLogTrace() which takes an integer mask
-    or using AddTraceMask() 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,
-
-    @code
-    wxLogTrace( wxTraceRefCount|wxTraceOleCalls, "Active object ref count: %d", nRef );
-    @endcode
-
-    will do something only if the current trace mask contains both @c wxTraceRefCount
-    and @c wxTraceOle, but:
-
-    @code
-    wxLogTrace( wxTRACE_OleCalls, "IFoo::Bar() called" );
-    @endcode
-
-    will log the message if it was preceded by:
-
-    @code
-    wxLog::AddTraceMask( wxTRACE_OleCalls);
-    @endcode
+    needs.

 
 

-    Using string masks is simpler and allows you 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 wxLogTrace() documentation.
-
-    Finally, the @e 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 % specifications fully described in the documentation of the
-    standard @e 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.
-
-    See also
-    @li AddTraceMask()
-    @li RemoveTraceMask()
-    @li ClearTraceMasks()
-    @li GetTraceMasks()
-    @li IsAllowedTraceMask()
-    @li SetVerbose()
-    @li GetVerbose()
-    @li SetTimestamp()
-    @li GetTimestamp()
-    @li SetTraceMask()
-    @li GetTraceMask()
-    @li SetRepetitionCounting()
-    @li GetRepetitionCounting()
-
-    @note 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 SetTimestamp() explicitly.
-
-
-    @section log_target Manipulating the log target
-
-    The functions in this section work with and manipulate the active log
-    target. The OnLog() is called by the @e wxLogXXX() functions
-    and invokes the DoLog() of the active log target if any.
-
-    Get/Set methods are used to install/query the current active target and,
-    finally, 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.
-
-    See also:
-    @li OnLog()
-    @li GetActiveTarget()
-    @li SetActiveTarget()
-    @li DontCreateOnDemand()
-    @li Suspend()
-    @li Resume()
+    Otherwise, it is completely hidden behind the @ref group_funcmacro_log "wxLogXXX() functions" 
+    and you may not even know about its existence.

 
 

+    @note For console-mode applications, the default target is wxLogStderr, so
+          that all @e wxLogXXX() functions print on @c stderr when @c wxUSE_GUI = 0.

 
     @library{wxcore}
     @category{logging}
 
 
     @library{wxcore}
     @category{logging}
 

-    @see @ref overview_log
+    @see @ref overview_log, @ref group_funcmacro_log "wxLogXXX() functions" 

 */
 class wxLog
 {
 public:
 */
 class wxLog
 {
 public:

+    /**
+        @name Trace mask functions
+    */
+    //@{
+    

     /**
         Add the @a mask to the list of allowed masks for wxLogTrace().
 
     /**
         Add the @a mask to the list of allowed masks for wxLogTrace().
 


@@ -677,113 +627,232 @@ public:
     static void ClearTraceMasks();
 
     /**
     static void ClearTraceMasks();
 
     /**

-        Disables time stamping of the log messages.
+        Returns the currently allowed list of string trace masks.

 
 

-        @since 2.9.0
+        @see AddTraceMask().

     */
     */

-    static void SetTimestamp(const wxString& format);
+    static const wxArrayString& GetTraceMasks();

 
     /**
 
     /**

-        Instructs wxLog to not create new log targets on the fly if there is none
-        currently. (Almost) for internal use only: it is supposed to be called by the
-        application shutdown code.
+        Returns @true if the @a mask is one of allowed masks for wxLogTrace().

 
 

-        Note that this function also calls ClearTraceMasks().
+        See also: AddTraceMask(), RemoveTraceMask()

     */
     */

-    static void DontCreateOnDemand();
+    static bool IsAllowedTraceMask(const wxString& mask);

 
     /**
 
     /**

-        Shows all the messages currently in buffer and clears it.
-        If the buffer is already empty, nothing happens.
+        Remove the @a mask from the list of allowed masks for
+        wxLogTrace().
+
+        @see AddTraceMask()

     */
     */

-    virtual void Flush();
+    static void RemoveTraceMask(const wxString& mask);
+    
+    //@}
+
+

 
     /**
 
     /**

-        Flushes the current log target if any, does nothing if there is none.
+        @name Log target functions
+    */
+    //@{
+    
+    /**
+        Instructs wxLog to not create new log targets on the fly if there is none
+        currently (see GetActiveTarget()). 
+        
+        (Almost) for internal use only: it is supposed to be called by the
+        application shutdown code (where you don't want the log target to be
+        automatically created anymore).

 
 

-        @see Flush()
+        Note that this function also calls ClearTraceMasks().

     */
     */

-    static void FlushActive();
+    static void DontCreateOnDemand();

 
     /**
         Returns the pointer to the active log target (may be @NULL).
 
     /**
         Returns the pointer to the active log target (may be @NULL).

+
+        Notice that if SetActiveTarget() hadn't been previously explicitly
+        called, this function will by default try to create a log target by
+        calling wxAppTraits::CreateLogTarget() which may be overridden in a
+        user-defined traits class to change the default behaviour. You may also
+        call DontCreateOnDemand() to disable this behaviour.
+
+        When this function is called from threads other than main one,
+        auto-creation doesn't happen. But if the thread has a thread-specific
+        log target previously set by SetThreadActiveTarget(), it is returned
+        instead of the global one. Otherwise, the global log target is
+        returned.

     */
     static wxLog* GetActiveTarget();
 
     /**
     */
     static wxLog* GetActiveTarget();
 
     /**

-        Returns the current log level limit.
+        Sets the specified log target as the active one.
+
+        Returns the pointer to the 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.
+
+        @see SetThreadActiveTarget()

     */
     */

-    static wxLogLevel GetLogLevel();
+    static wxLog* SetActiveTarget(wxLog* logtarget);

 
     /**
 
     /**

-        Returns whether the repetition counting mode is enabled.
-    */
-    static bool GetRepetitionCounting();
+        Sets a thread-specific log target.
+
+        The log target passed to this function will be used for all messages
+        logged by the current thread using the usual wxLog functions. This
+        shouldn't be called from the main thread which never uses a thread-
+        specific log target but can be used for the other threads to handle
+        thread logging completely separately; instead of buffering thread log
+        messages in the main thread logger.
+
+        Notice that unlike for SetActiveTarget(), wxWidgets does not destroy
+        the thread-specific log targets when the thread terminates so doing
+        this is your responsibility.
+
+        This method is only available if @c wxUSE_THREADS is 1, i.e. wxWidgets
+        was compiled with threads support.
+
+        @param logger
+            The new thread-specific log target, possibly @NULL.
+        @return
+            The previous thread-specific log target, initially @NULL.

 
 

+        @since 2.9.1
+     */
+    static wxLog *SetThreadActiveTarget(wxLog *logger);
+    

     /**
     /**

-        Returns the current timestamp format string.
-    */
-    static const wxString GetTimestamp();
+        Flushes the current log target if any, does nothing if there is none.

 
 

+        When this method is called from the main thread context, it also
+        flushes any previously buffered messages logged by the other threads.
+        When it is called from the other threads it simply calls Flush() on the
+        currently active log target, so it mostly makes sense to do this if a
+        thread has its own logger set with SetThreadActiveTarget().
+    */
+    static void FlushActive();
+    

     /**
     /**

-        Returns the current trace mask, see Customization() section for details.
+        Resumes logging previously suspended by a call to Suspend().
+        All messages logged in the meanwhile will be flushed soon.

     */
     */

-    static wxTraceMask GetTraceMask();
+    static void Resume();

 
     /**
 
     /**

-        Returns the currently allowed list of string trace masks.
+        Suspends the logging until Resume() is called.

 
 

-        @see AddTraceMask().
+        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 flushed
+        periodically, it doesn't have any effect if the current log target does the
+        logging immediately without waiting for Flush() to be called (the standard
+        GUI log target only shows the log dialog when it is flushed, so Suspend()
+        works as expected with it).
+
+        @see Resume(), wxLogNull

     */
     */

-    static const wxArrayString GetTraceMasks();
+    static void Suspend();
+    
+    //@}
+    
+

 
     /**
 
     /**

-        Returns whether the verbose mode is currently active.
+        @name Log level functions

     */
     */

-    static bool GetVerbose();
-
+    //@{
+    

     /**
     /**

-        Returns @true if the @a mask is one of allowed masks for wxLogTrace().
+        Returns the current log level limit.

 
 

-        See also: AddTraceMask(), RemoveTraceMask()
+        All messages at levels strictly greater than the value returned by this
+        function are not logged at all.
+
+        @see SetLogLevel(), IsLevelEnabled()

     */
     */

-    static bool IsAllowedTraceMask(const wxString& mask);
+    static wxLogLevel GetLogLevel();
+    
+    /**
+        Returns true if logging at this level is enabled for the current thread.
+
+        This function only returns @true if logging is globally enabled and if
+        @a level is less than or equal to the maximal log level enabled for the
+        given @a component.
+
+        @see IsEnabled(), SetLogLevel(), GetLogLevel(), SetComponentLevel()
+
+        @since 2.9.1
+     */
+    static bool IsLevelEnabled(wxLogLevel level, wxString component);

 
     /**
 
     /**

-        Forwards the message at specified level to the @e DoLog() function of the
-        active log target if there is any, does nothing otherwise.
-    */
-    static void OnLog(wxLogLevel level, const wxString& message);
+        Sets the log level for the given component.
+
+        For example, to disable all but error messages from wxWidgets network
+        classes you may use
+        @code
+            wxLog::SetComponentLevel("wx/net", wxLOG_Error);
+        @endcode
+
+        SetLogLevel() may be used to set the global log level.
+
+        @param component
+            Non-empty component name, possibly using slashes (@c /) to separate
+            it into several parts.
+        @param level
+            Maximal level of log messages from this component which will be
+            handled instead of being simply discarded.
+
+        @since 2.9.1
+     */
+    static void SetComponentLevel(const wxString& component, wxLogLevel level);

 
     /**
 
     /**

-        Remove the @a mask from the list of allowed masks for
-        wxLogTrace().
+        Specifies that log messages with level greater (numerically) than
+        @a logLevel should be ignored and not sent to the active log target.

 
 

-        @see AddTraceMask()
+        @see SetComponentLevel()

     */
     */

-    static void RemoveTraceMask(const wxString& mask);
+    static void SetLogLevel(wxLogLevel logLevel);
+    
+    //@}
+
+

 
     /**
 
     /**

-        Resumes logging previously suspended by a call to Suspend().
-        All messages logged in the meanwhile will be flushed soon.
+        @name Enable/disable features functions

     */
     */

-    static void Resume();
-
+    //@{
+    

     /**
     /**

-        Sets the specified log target as the active one.
+        Globally enable or disable logging.

 
 

-        Returns the pointer to the 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.
-    */
-    static wxLog* SetActiveTarget(wxLog* logtarget);
+        Calling this function with @false argument disables all log messages
+        for the current thread.
+
+        @see wxLogNull, IsEnabled()
+
+        @return
+            The old state, i.e. @true if logging was previously enabled and
+            @false if it was disabled.
+     */
+    static bool EnableLogging(bool enable = true);

 
     /**
 
     /**

-        Specifies that log messages with level  logLevel should be ignored
-        and not sent to the active log target.
+        Returns true if logging is enabled at all now.
+
+        @see IsLevelEnabled(), EnableLogging()
+     */
+    static bool IsEnabled();
+    
+    /**
+        Returns whether the repetition counting mode is enabled.

     */
     */

-    static void SetLogLevel(wxLogLevel logLevel);
+    static bool GetRepetitionCounting();

 
     /**
         Enables logging mode in which a log message is logged once, and in case exactly
 
     /**
         Enables logging mode in which a log message is logged once, and in case exactly


@@ -791,63 +860,142 @@ public:
         repetitions is logged.
     */
     static void SetRepetitionCounting(bool repetCounting = true);
         repetitions is logged.
     */
     static void SetRepetitionCounting(bool repetCounting = true);

+    
+    /**
+        Returns the current timestamp format string.
+    */
+    static const wxString& GetTimestamp();

 
     /**
         Sets the timestamp format prepended by the default log targets to all
         messages. The string may contain any normal characters as well as %
 
     /**
         Sets the timestamp format prepended by the default log targets to all
         messages. The string may contain any normal characters as well as %

-        prefixed format specificators, see @e strftime() manual for details.
+        prefixed format specifiers, see @e strftime() manual for details.

         Passing an empty string to this function disables message time stamping.
     */
     static void SetTimestamp(const wxString& format);
 
     /**
         Passing an empty string to this function disables message time stamping.
     */
     static void SetTimestamp(const wxString& format);
 
     /**

-        Sets the trace mask, see @ref log_derivingyours section for details.
+        Disables time stamping of the log messages.
+
+        @since 2.9.0
+    */
+    static void DisableTimestamp();
+    
+    /**
+        Returns whether the verbose mode is currently active.

     */
     */

-    static void SetTraceMask(wxTraceMask mask);
+    static bool GetVerbose();

 
     /**
         Activates or deactivates verbose mode in which the verbose messages are
         logged as the normal ones instead of being silently dropped.
 
     /**
         Activates or deactivates verbose mode in which the verbose messages are
         logged as the normal ones instead of being silently dropped.

+        
+        The verbose messages are the trace messages which are not disabled in the
+        release mode and are generated by wxLogVerbose().
+        
+        @see @ref overview_log

     */
     static void SetVerbose(bool verbose = true);
     */
     static void SetVerbose(bool verbose = true);

+    
+    //@}
+    
+    

 
     /**
 
     /**

-        Suspends the logging until Resume() 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 Flush() to be called (the standard
-        GUI log target only shows the log dialog when it is flushed, so Suspend()
-        works as expected with it).
+        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).
+        This function shows them all and clears the buffer contents.
+        If the buffer is already empty, nothing happens.

 
 

-        @see Resume(), wxLogNull
+        If you override this method in a derived class, call the base class
+        version first, before doing anything else.

     */
     */

-    static void Suspend();
+    virtual void Flush();
+    
+    /**
+        Log the given record.
+
+        This function should only be called from the DoLog() implementations in
+        the derived classes if they need to call DoLogRecord() on another log
+        object (they can, of course, just use wxLog::DoLogRecord() call syntax
+        to call it on the object itself). It should not be used for logging new
+        messages which can be only sent to the currently active logger using
+        OnLog() which also checks if the logging (for this level) is enabled
+        while this method just directly calls DoLog().
+
+        Example of use of this class from wxLogChain:
+        @code
+        void wxLogChain::DoLogRecord(wxLogLevel level,
+                                     const wxString& msg,
+                                     const wxLogRecordInfo& info)
+        {
+            // let the previous logger show it
+            if ( m_logOld && IsPassingMessages() )
+                m_logOld->LogRecord(level, msg, info);
+
+            // and also send it to the new one
+            if ( m_logNew && m_logNew != this )
+                m_logNew->LogRecord(level, msg, info);
+        }
+        @endcode
+
+        @since 2.9.1
+     */
+    void LogRecord(wxLogLevel level, const wxString& msg, time_t timestamp);

 
 protected:
 
 protected:

+    /**
+        @name Logging callbacks.
+
+        The functions which should be overridden by custom log targets.
+
+        When defining a new log target, you have a choice between overriding
+        DoLogRecord(), which provides maximal flexibility, DoLogTextAtLevel()
+        which can be used if you don't intend to change the default log
+        messages formatting but want to handle log messages of different levels
+        differently or, in the simplest case, DoLogText().
+     */
+    //@{
+
+    /**
+        Called to log a new record.
+
+        Any log message created by wxLogXXX() functions is passed to this
+        method of the active log target. The default implementation prepends
+        the timestamp and, for some log levels (e.g. error and warning), the
+        corresponding prefix to @a msg and passes it to DoLogTextAtLevel().
+
+        You may override this method to implement custom formatting of the
+        log messages or to implement custom filtering of log messages (e.g. you
+        could discard all log messages coming from the given source file).
+     */
+    virtual void DoLogRecord(wxLogLevel level,
+                             const wxString& msg,
+                             const wxLogRecordInfo& info);

 
     /**
 
     /**

-        Called to process the message of the specified severity. @a msg is the text
-        of the message as specified in the call of @e wxLogXXX() function which
-        generated it and @a timestamp is the moment when the message was generated.
+        Called to log the specified string at given level.

 
 

-        The base class version prepends the timestamp to the message, adds a prefix
-        corresponding to the log level and then calls
-        DoLogString() with the resulting string.
+        The base class versions logs debug and trace messages on the system
+        default debug output channel and passes all the other messages to
+        DoLogText().

     */
     */

-    virtual void DoLog(wxLogLevel level, const wxString& msg, time_t timestamp);
+    virtual void DoLogTextAtLevel(wxLogLevel level, const wxString& msg);

 
     /**
 
     /**

-        Called to log the specified string. The timestamp is already included in the
-        string but still passed to this function.
+        Called to log the specified string.
+
+        A simple implementation might just send the string to @c stdout or
+        @c stderr or save it in a file (of course, the already existing
+        wxLogStderr can be used for this).

 
 

-        A simple implementation may just send the string to @c stdout or, better,
-        @c stderr.
+        The base class version of this function asserts so it must be
+        overridden if you don't override DoLogRecord() or DoLogTextAtLevel().

     */
     */

-    virtual void DoLogString(const wxString& msg, time_t timestamp);
+    virtual void DoLogText(const wxString& msg);
+
+    //@}

 };
 
 
 };
 
 


@@ -900,7 +1048,7 @@ protected:
     @library{wxbase}
     @category{logging}
 */
     @library{wxbase}
     @category{logging}
 */

-class wxLogNull : public wxLog
+class wxLogNull

 {
 public:
     /**
 {
 public:
     /**


@@ -920,7 +1068,7 @@ public:
 // Global functions/macros
 // ============================================================================
 
 // Global functions/macros
 // ============================================================================
 

-/** @ingroup group_funcmacro_log */
+/** @addtogroup group_funcmacro_log */

 //@{
 
 /**
 //@{
 
 /**


@@ -966,7 +1114,7 @@ const wxChar* wxSysErrorMsg(unsigned long errCode = 0);
 
 //@}
 
 
 //@}
 

-/** @ingroup group_funcmacro_log */
+/** @addtogroup group_funcmacro_log */

 //@{
 /**
     For all normal, informational messages. They also appear in a message box
 //@{
 /**
     For all normal, informational messages. They also appear in a message box


@@ -978,7 +1126,7 @@ void wxLogMessage(const char* formatString, ... );
 void wxVLogMessage(const char* formatString, va_list argPtr);
 //@}
 
 void wxVLogMessage(const char* formatString, va_list argPtr);
 //@}
 

-/** @ingroup group_funcmacro_log */
+/** @addtogroup group_funcmacro_log */

 //@{
 /**
     For verbose output. Normally, it is suppressed, but might be activated if
 //@{
 /**
     For verbose output. Normally, it is suppressed, but might be activated if


@@ -991,7 +1139,7 @@ void wxLogVerbose(const char* formatString, ... );
 void wxVLogVerbose(const char* formatString, va_list argPtr);
 //@}
 
 void wxVLogVerbose(const char* formatString, va_list argPtr);
 //@}
 

-/** @ingroup group_funcmacro_log */
+/** @addtogroup group_funcmacro_log */

 //@{
 /**
     For warnings - they are also normally shown to the user, but don't
 //@{
 /**
     For warnings - they are also normally shown to the user, but don't


@@ -1003,7 +1151,7 @@ void wxLogWarning(const char* formatString, ... );
 void wxVLogWarning(const char* formatString, va_list argPtr);
 //@}
 
 void wxVLogWarning(const char* formatString, va_list argPtr);
 //@}
 

-/** @ingroup group_funcmacro_log */
+/** @addtogroup group_funcmacro_log */

 //@{
 /**
     Like wxLogError(), but also terminates the program with the exit code 3.
 //@{
 /**
     Like wxLogError(), but also terminates the program with the exit code 3.


@@ -1016,7 +1164,7 @@ void wxLogFatalError(const char* formatString, ... );
 void wxVLogFatalError(const char* formatString, va_list argPtr);
 //@}
 
 void wxVLogFatalError(const char* formatString, va_list argPtr);
 //@}
 

-/** @ingroup group_funcmacro_log */
+/** @addtogroup group_funcmacro_log */

 //@{
 /**
     The functions to use for error messages, i.e. the messages that must be
 //@{
 /**
     The functions to use for error messages, i.e. the messages that must be


@@ -1029,38 +1177,25 @@ void wxLogError(const char* formatString, ... );
 void wxVLogError(const char* formatString, va_list argPtr);
 //@}
 
 void wxVLogError(const char* formatString, va_list argPtr);
 //@}
 

-/** @ingroup group_funcmacro_log */
+/** @addtogroup group_funcmacro_log */

 //@{
 /**
 //@{
 /**

-    Like wxLogDebug(), trace functions only do something in debug builds and
-    expand to nothing in the release one. The reason for making it a separate
-    function is that usually there are a lot of trace messages, so it might
-    make sense to separate them from other debug messages.
+    Log a message at @c wxLOG_Trace log level (see ::wxLogLevelValues enum).

 
 

-    wxLogDebug(const char*,const char*,...) and
-    wxLogDebug(wxTraceMask,const char*,...) can be used instead if you would
-    like to be able to separate trace messages into different categories which
-    can be enabled or disabled with the static functions provided in wxLog.
+    Notice that the use of trace masks is not recommended any more as setting
+    the log components (please see @ref overview_log_enable) provides a way to
+    do the same thing for log messages of any level, and not just the tracing
+    ones.

 
 

-    @header{wx/log.h}
-*/
-void wxLogTrace(const char* formatString, ... );
-void wxVLogTrace(const char* formatString, va_list argPtr);
-//@}
-
-/** @ingroup group_funcmacro_log */
-//@{
-/**

     Like wxLogDebug(), trace functions only do something in debug builds and
     expand to nothing in the release one. The reason for making it a separate
     function is that usually there are a lot of trace messages, so it might
     make sense to separate them from other debug messages.
 
     Like wxLogDebug(), trace functions only do something in debug builds and
     expand to nothing in the release one. The reason for making it a separate
     function is that usually there are a lot of trace messages, so it might
     make sense to separate them from other debug messages.
 

-    In this version of wxLogTrace(), trace messages can be separated into
-    different categories and calls using this function only log the message if
-    the given @a mask is currently enabled in wxLog. This lets you selectively
-    trace only some operations and not others by enabling the desired trace
-    masks with wxLog::AddTraceMask() or by setting the
+    Trace messages can be separated into different categories; these functions in facts
+    only log the message if the given @a mask is currently enabled in wxLog. 
+    This lets you selectively trace only some operations and not others by enabling the 
+    desired trace masks with wxLog::AddTraceMask() or by setting the

     @ref overview_envvars "@c WXTRACE environment variable".
 
     The predefined string trace masks used by wxWidgets are:
     @ref overview_envvars "@c WXTRACE environment variable".
 
     The predefined string trace masks used by wxWidgets are:


@@ -1073,25 +1208,13 @@ void wxVLogTrace(const char* formatString, va_list argPtr);
     @itemdef{ wxTRACE_OleCalls, Trace OLE method calls (Win32 only) }
     @endDefList
 
     @itemdef{ wxTRACE_OleCalls, Trace OLE method calls (Win32 only) }
     @endDefList
 

-    @note Since both the mask and the format string are strings, this might
-          lead to function signature confusion in some cases: if you intend to
-          call the format string only version of wxLogTrace(), add a "%s"
-          format string parameter and then supply a second string parameter for
-          that "%s", the string mask version of wxLogTrace() will erroneously
-          get called instead, since you are supplying two string parameters to
-          the function. In this case you'll unfortunately have to avoid having
-          two leading string parameters, e.g. by adding a bogus integer (with
-          its "%d" format string).
-

     @header{wx/log.h}
 */
 void wxLogTrace(const char* mask, const char* formatString, ... );
     @header{wx/log.h}
 */
 void wxLogTrace(const char* mask, const char* formatString, ... );

-void wxVLogTrace(const char* mask,
-                  const char* formatString,
-                  va_list argPtr);
+void wxVLogTrace(const char* mask, const char* formatString, va_list argPtr);

 //@}
 
 //@}
 

-/** @ingroup group_funcmacro_log */
+/** @addtogroup group_funcmacro_log */

 //@{
 /**
     Like wxLogDebug(), trace functions only do something in debug builds and
 //@{
 /**
     Like wxLogDebug(), trace functions only do something in debug builds and


@@ -1099,10 +1222,11 @@ void wxVLogTrace(const char* mask,
     function is that usually there are a lot of trace messages, so it might
     make sense to separate them from other debug messages.
 
     function is that usually there are a lot of trace messages, so it might
     make sense to separate them from other debug messages.
 

+    @deprecated

     This version of wxLogTrace() only logs the message if all the bits
     corresponding to the @a mask are set in the wxLog trace mask which can be
     set by calling wxLog::SetTraceMask(). This version is less flexible than
     This version of wxLogTrace() only logs the message if all the bits
     corresponding to the @a mask are set in the wxLog trace mask which can be
     set by calling wxLog::SetTraceMask(). This version is less flexible than

-    wxLogDebug(const char*,const char*,...) because it doesn't allow defining
+    wxLogTrace(const char*,const char*,...) because it doesn't allow defining

     the user trace masks easily. This is why it is deprecated in favour of
     using string trace masks.
 
     the user trace masks easily. This is why it is deprecated in favour of
     using string trace masks.
 


@@ -1122,7 +1246,7 @@ void wxLogTrace(wxTraceMask mask, const char* formatString, ... );
 void wxVLogTrace(wxTraceMask mask, const char* formatString, va_list argPtr);
 //@}
 
 void wxVLogTrace(wxTraceMask mask, const char* formatString, va_list argPtr);
 //@}
 

-/** @ingroup group_funcmacro_log */
+/** @addtogroup group_funcmacro_log */

 //@{
 /**
     The right functions for debug output. They only do something in debug mode
 //@{
 /**
     The right functions for debug output. They only do something in debug mode


@@ -1135,7 +1259,7 @@ void wxLogDebug(const char* formatString, ... );
 void wxVLogDebug(const char* formatString, va_list argPtr);
 //@}
 
 void wxVLogDebug(const char* formatString, va_list argPtr);
 //@}
 

-/** @ingroup group_funcmacro_log */
+/** @addtogroup group_funcmacro_log */

 //@{
 /**
     Messages logged by this function will appear in the statusbar of the
 //@{
 /**
     Messages logged by this function will appear in the statusbar of the


@@ -1152,7 +1276,7 @@ void wxLogStatus(const char* formatString, ... );
 void wxVLogStatus(const char* formatString, va_list argPtr);
 //@}
 
 void wxVLogStatus(const char* formatString, va_list argPtr);
 //@}
 

-/** @ingroup group_funcmacro_log */
+/** @addtogroup group_funcmacro_log */

 //@{
 /**
     Mostly used by wxWidgets itself, but might be handy for logging errors
 //@{
 /**
     Mostly used by wxWidgets itself, but might be handy for logging errors


@@ -1170,3 +1294,24 @@ void wxLogSysError(const char* formatString, ... );
 void wxVLogSysError(const char* formatString, va_list argPtr);
 //@}
 
 void wxVLogSysError(const char* formatString, va_list argPtr);
 //@}
 

+/** @addtogroup group_funcmacro_debug */
+//@{
+
+/**
+    @def wxDISABLE_DEBUG_LOGGING_IN_RELEASE_BUILD()
+
+    Use this macro to disable logging at debug and trace levels in release
+    build when not using wxIMPLEMENT_APP().
+
+    @see wxDISABLE_DEBUG_SUPPORT(),
+         wxDISABLE_ASSERTS_IN_RELEASE_BUILD(),
+         @ref overview_debugging
+
+    @since 2.9.1
+
+    @header{wx/log.h}
+ */
+#define wxDISABLE_DEBUG_LOGGING_IN_RELEASE_BUILD()
+
+//@}
+