Support using GetTextExtent() with empty string to get descent in wxOSX.

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

diff --git a/include/wx/log.h b/include/wx/log.h
index 6bde1a61d0104d3145b114773927f252f54b88a7..e3e1f54adf4c588df38a7c45800dfe5142cd626c 100644 (file)
--- a/include/wx/log.h
+++ b/include/wx/log.h
@@ -29,7 +29,7 @@ typedef unsigned long wxLogLevel;
     #define wxTraceResAlloc 0x0004  // trace GDI resource allocation
     #define wxTraceRefCount 0x0008  // trace various ref counting operations
 
     #define wxTraceResAlloc 0x0004  // trace GDI resource allocation
     #define wxTraceRefCount 0x0008  // trace various ref counting operations
 

-    #ifdef  __WXMSW__
+    #ifdef  __WINDOWS__

         #define wxTraceOleCalls 0x0100  // OLE interface calls
     #endif
 
         #define wxTraceOleCalls 0x0100  // OLE interface calls
     #endif
 


@@ -43,17 +43,26 @@ typedef unsigned long wxLogLevel;
 #include "wx/string.h"
 #include "wx/strvararg.h"
 
 #include "wx/string.h"
 #include "wx/strvararg.h"
 

+// ----------------------------------------------------------------------------
+// forward declarations
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_FWD_BASE wxObject;
+
+#if wxUSE_GUI
+    class WXDLLIMPEXP_FWD_CORE wxFrame;
+#endif // wxUSE_GUI
+

 #if wxUSE_LOG
 
 #include "wx/arrstr.h"
 
 #if wxUSE_LOG
 
 #include "wx/arrstr.h"
 

-#ifndef __WXPALMOS5__

 #ifndef __WXWINCE__
     #include <time.h>   // for time_t
 #endif
 #ifndef __WXWINCE__
     #include <time.h>   // for time_t
 #endif

-#endif // ! __WXPALMOS5__

 
 #include "wx/dynarray.h"
 
 #include "wx/dynarray.h"

+#include "wx/hashmap.h"

 
 #if wxUSE_THREADS
     #include "wx/thread.h"
 
 #if wxUSE_THREADS
     #include "wx/thread.h"


@@ -77,13 +86,18 @@ typedef unsigned long wxLogLevel;
     #endif
 #endif // wxUSE_LOG_TRACE
 
     #endif
 #endif // wxUSE_LOG_TRACE
 

-// ----------------------------------------------------------------------------
-// forward declarations
-// ----------------------------------------------------------------------------
+// wxLOG_COMPONENT identifies the component which generated the log record and
+// can be #define'd to a user-defined value when compiling the user code to use
+// component-based filtering (see wxLog::SetComponentLevel())
+#ifndef wxLOG_COMPONENT
+    // this is a variable and not a macro in order to allow the user code to
+    // just #define wxLOG_COMPONENT without #undef'ining it first
+    extern WXDLLIMPEXP_DATA_BASE(const char *) wxLOG_COMPONENT;

 
 

-#if wxUSE_GUI
-    class WXDLLIMPEXP_FWD_CORE wxFrame;
-#endif // wxUSE_GUI
+    #ifdef WXBUILDING
+        #define wxLOG_COMPONENT "wx"
+    #endif
+#endif

 
 // ----------------------------------------------------------------------------
 // constants
 
 // ----------------------------------------------------------------------------
 // constants


@@ -114,7 +128,7 @@ enum wxLogLevelValues
 #define wxTRACE_ResAlloc wxT("resalloc") // trace GDI resource allocation
 #define wxTRACE_RefCount wxT("refcount") // trace various ref counting operations
 
 #define wxTRACE_ResAlloc wxT("resalloc") // trace GDI resource allocation
 #define wxTRACE_RefCount wxT("refcount") // trace various ref counting operations
 

-#ifdef  __WXMSW__
+#ifdef  __WINDOWS__

     #define wxTRACE_OleCalls wxT("ole")  // OLE interface calls
 #endif
 
     #define wxTRACE_OleCalls wxT("ole")  // OLE interface calls
 #endif
 


@@ -124,19 +138,72 @@ enum wxLogLevelValues
 // information about a log record, i.e. unit of log output
 // ----------------------------------------------------------------------------
 
 // information about a log record, i.e. unit of log output
 // ----------------------------------------------------------------------------
 

-struct wxLogRecordInfo
+class wxLogRecordInfo

 {
 {

+public:
+    // default ctor creates an uninitialized object

     wxLogRecordInfo()
     {
     wxLogRecordInfo()
     {

-        timestamp = 0;
+        memset(this, 0, sizeof(*this));
+    }
+
+    // normal ctor, used by wxLogger specifies the location of the log
+    // statement; its time stamp and thread id are set up here
+    wxLogRecordInfo(const char *filename_,
+                    int line_,
+                    const char *func_,
+                    const char *component_)
+    {
+        filename = filename_;
+        func = func_;
+        line = line_;
+        component = component_;
+
+        timestamp = time(NULL);

 
 #if wxUSE_THREADS
 
 #if wxUSE_THREADS

-        threadId = 0;
+        threadId = wxThread::GetCurrentId();

 #endif // wxUSE_THREADS
 #endif // wxUSE_THREADS

+
+        m_data = NULL;

     }
 
     }
 

-    // default copy ctor, assignment operator and dtor are ok
+    // we need to define copy ctor and assignment operator because of m_data
+    wxLogRecordInfo(const wxLogRecordInfo& other)
+    {
+        Copy(other);
+    }

 
 

+    wxLogRecordInfo& operator=(const wxLogRecordInfo& other)
+    {
+        if ( &other != this )
+        {
+            delete m_data;
+            Copy(other);
+        }
+
+        return *this;
+    }
+
+    // dtor is non-virtual, this class is not meant to be derived from
+    ~wxLogRecordInfo()
+    {
+        delete m_data;
+    }
+
+
+    // the file name and line number of the file where the log record was
+    // generated, if available or NULL and 0 otherwise
+    const char *filename;
+    int line;
+
+    // the name of the function where the log record was generated (may be NULL
+    // if the compiler doesn't support __FUNCTION__)
+    const char *func;
+
+    // the name of the component which generated this message, may be NULL if
+    // not set (i.e. wxLOG_COMPONENT not defined)
+    const char *component;

 
     // time of record generation
     time_t timestamp;
 
     // time of record generation
     time_t timestamp;


@@ -145,8 +212,129 @@ struct wxLogRecordInfo
     // id of the thread which logged this record
     wxThreadIdType threadId;
 #endif // wxUSE_THREADS
     // id of the thread which logged this record
     wxThreadIdType threadId;
 #endif // wxUSE_THREADS

+
+
+    // store an arbitrary value in this record context
+    //
+    // wxWidgets always uses keys starting with "wx.", e.g. "wx.sys_error"
+    void StoreValue(const wxString& key, wxUIntPtr val)
+    {
+        if ( !m_data )
+            m_data = new ExtraData;
+
+        m_data->numValues[key] = val;
+    }
+
+    void StoreValue(const wxString& key, const wxString& val)
+    {
+        if ( !m_data )
+            m_data = new ExtraData;
+
+        m_data->strValues[key] = val;
+    }
+
+
+    // these functions retrieve the value of either numeric or string key,
+    // return false if not found
+    bool GetNumValue(const wxString& key, wxUIntPtr *val) const
+    {
+        if ( !m_data )
+            return false;
+
+        wxStringToNumHashMap::const_iterator it = m_data->numValues.find(key);
+        if ( it == m_data->numValues.end() )
+            return false;
+
+        *val = it->second;
+
+        return true;
+    }
+
+    bool GetStrValue(const wxString& key, wxString *val) const
+    {
+        if ( !m_data )
+            return false;
+
+        wxStringToStringHashMap::const_iterator it = m_data->strValues.find(key);
+        if ( it == m_data->strValues.end() )
+            return false;
+
+        *val = it->second;
+
+        return true;
+    }
+
+private:
+    void Copy(const wxLogRecordInfo& other)
+    {
+        memcpy(this, &other, sizeof(*this));
+        if ( other.m_data )
+           m_data = new ExtraData(*other.m_data);
+    }
+
+    // extra data associated with the log record: this is completely optional
+    // and can be used to pass information from the log function to the log
+    // sink (e.g. wxLogSysError() uses this to pass the error code)
+    struct ExtraData
+    {
+        wxStringToNumHashMap numValues;
+        wxStringToStringHashMap strValues;
+    };
+
+    // NULL if not used
+    ExtraData *m_data;

 };
 
 };
 

+#define wxLOG_KEY_TRACE_MASK "wx.trace_mask"
+
+// ----------------------------------------------------------------------------
+// log record: a unit of log output
+// ----------------------------------------------------------------------------
+
+struct wxLogRecord
+{
+    wxLogRecord(wxLogLevel level_,
+                const wxString& msg_,
+                const wxLogRecordInfo& info_)
+        : level(level_),
+          msg(msg_),
+          info(info_)
+    {
+    }
+
+    wxLogLevel level;
+    wxString msg;
+    wxLogRecordInfo info;
+};
+
+// ----------------------------------------------------------------------------
+// Derive from this class to customize format of log messages.
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_BASE wxLogFormatter
+{
+public:
+    // Default constructor.
+    wxLogFormatter() { }
+
+    // Trivial but virtual destructor for the base class.
+    virtual ~wxLogFormatter() { }
+
+
+    // Override this method to implement custom formatting of the given log
+    // record. The default implementation simply prepends a level-dependent
+    // prefix to the message and optionally adds a time stamp.
+    virtual wxString Format(wxLogLevel level,
+                            const wxString& msg,
+                            const wxLogRecordInfo& info) const;
+
+protected:
+    // Override this method to change just the time stamp formatting. It is
+    // called by default Format() implementation.
+    virtual wxString FormatTime(time_t t) const;
+};
+
+

 // ----------------------------------------------------------------------------
 // derive from this class to redirect (or suppress, or ...) log messages
 // normally, only a single instance of this class exists but it's not enforced
 // ----------------------------------------------------------------------------
 // derive from this class to redirect (or suppress, or ...) log messages
 // normally, only a single instance of this class exists but it's not enforced


@@ -156,50 +344,106 @@ class WXDLLIMPEXP_BASE wxLog
 {
 public:
     // ctor
 {
 public:
     // ctor

-    wxLog() { }
+    wxLog() : m_formatter(new wxLogFormatter) { }

 
     // make dtor virtual for all derived classes
     virtual ~wxLog();
 
 
 
     // make dtor virtual for all derived classes
     virtual ~wxLog();
 
 

-    // these functions allow to completely disable all log messages
+    // log messages selection
+    // ----------------------
+
+    // these functions allow to completely disable all log messages or disable
+    // log messages at level less important than specified for the current
+    // thread

 
     // is logging enabled at all now?
 
     // is logging enabled at all now?

-    static bool IsEnabled() { return ms_doLog; }
+    static bool IsEnabled()
+    {
+#if wxUSE_THREADS
+        if ( !wxThread::IsMain() )
+            return IsThreadLoggingEnabled();
+#endif // wxUSE_THREADS

 
 

-    // is logging at this level enabled?
-    static bool IsLevelEnabled(wxLogLevel level)
-        { return IsEnabled() && level <= ms_logLevel; }
+        return ms_doLog;
+    }

 
     // change the flag state, return the previous one
 
     // change the flag state, return the previous one

-    static bool EnableLogging(bool doIt = true)
-        { bool doLogOld = ms_doLog; ms_doLog = doIt; return doLogOld; }
+    static bool EnableLogging(bool enable = true)
+    {
+#if wxUSE_THREADS
+        if ( !wxThread::IsMain() )
+            return EnableThreadLogging(enable);
+#endif // wxUSE_THREADS
+
+        bool doLogOld = ms_doLog;
+        ms_doLog = enable;
+        return doLogOld;
+    }
+
+    // return the current global log level
+    static wxLogLevel GetLogLevel() { return ms_logLevel; }
+
+    // set global log level: messages with level > logLevel will not be logged
+    static void SetLogLevel(wxLogLevel logLevel) { ms_logLevel = logLevel; }
+
+    // set the log level for the given component
+    static void SetComponentLevel(const wxString& component, wxLogLevel level);
+
+    // return the effective log level for this component, falling back to
+    // parent component and to the default global log level if necessary
+    //
+    // NB: component argument is passed by value and not const reference in an
+    //     attempt to encourage compiler to avoid an extra copy: as we modify
+    //     the component internally, we'd create one anyhow and like this it
+    //     can be avoided if the string is a temporary anyhow
+    static wxLogLevel GetComponentLevel(wxString component);
+
+
+    // is logging of messages from this component enabled at this level?
+    //
+    // usually always called with wxLOG_COMPONENT as second argument
+    static bool IsLevelEnabled(wxLogLevel level, wxString component)
+    {
+        return IsEnabled() && level <= GetComponentLevel(component);
+    }
+
+
+    // enable/disable messages at wxLOG_Verbose level (only relevant if the
+    // current log level is greater or equal to it)
+    //
+    // notice that verbose mode can be activated by the standard command-line
+    // '--verbose' option
+    static void SetVerbose(bool bVerbose = true) { ms_bVerbose = bVerbose; }
+
+    // check if verbose messages are enabled
+    static bool GetVerbose() { return ms_bVerbose; }
+

 
     // message buffering
 
     // message buffering

+    // -----------------

 
     // flush shows all messages if they're not logged immediately (FILE
 
     // flush shows all messages if they're not logged immediately (FILE

-    // and iostream logs don't need it, but wxGuiLog does to avoid showing
+    // and iostream logs don't need it, but wxLogGui does to avoid showing

     // 17 modal dialogs one after another)
     virtual void Flush();
 
     // 17 modal dialogs one after another)
     virtual void Flush();
 

-    // flush the active target if any
-    static void FlushActive()
-    {
-        if ( !ms_suspendCount )
-        {
-            wxLog *log = GetActiveTarget();
-            if ( log )
-                log->Flush();
-        }
-    }
+    // flush the active target if any and also output any pending messages from
+    // background threads
+    static void FlushActive();

 
 

-    // only one sink is active at each moment
-    // get current log target, will call wxApp::CreateLogTarget() to
-    // create one if none exists
+    // only one sink is active at each moment get current log target, will call
+    // wxAppTraits::CreateLogTarget() to create one if none exists

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

-    // change log target, pLogger may be NULL
-    static wxLog *SetActiveTarget(wxLog *pLogger);
+    // change log target, logger may be NULL
+    static wxLog *SetActiveTarget(wxLog *logger);
+
+#if wxUSE_THREADS
+    // change log target for the current thread only, shouldn't be called from
+    // the main thread as it doesn't use thread-specific log target
+    static wxLog *SetThreadActiveTarget(wxLog *logger);
+#endif // wxUSE_THREADS

 
     // suspend the message flushing of the main target until the next call
     // to Resume() - this is mainly for internal use (to prevent wxYield()
 
     // suspend the message flushing of the main target until the next call
     // to Resume() - this is mainly for internal use (to prevent wxYield()


@@ -209,14 +453,6 @@ public:
     // must be called for each Suspend()!
     static void Resume() { ms_suspendCount--; }
 
     // must be called for each Suspend()!
     static void Resume() { ms_suspendCount--; }
 

-    // functions controlling the default wxLog behaviour
-    // verbose mode is activated by standard command-line '--verbose'
-    // option
-    static void SetVerbose(bool bVerbose = true) { ms_bVerbose = bVerbose; }
-
-    // Set log level.  Log messages with level > logLevel will not be logged.
-    static void SetLogLevel(wxLogLevel logLevel) { ms_logLevel = logLevel; }
-

     // should GetActiveTarget() try to create a new log object if the
     // current is NULL?
     static void DontCreateOnDemand();
     // should GetActiveTarget() try to create a new log object if the
     // current is NULL?
     static void DontCreateOnDemand();


@@ -243,7 +479,27 @@ public:
 
     // get string trace masks: note that this is MT-unsafe if other threads can
     // call AddTraceMask() concurrently
 
     // get string trace masks: note that this is MT-unsafe if other threads can
     // call AddTraceMask() concurrently

-    static const wxArrayString& GetTraceMasks() { return ms_aTraceMasks; }
+    static const wxArrayString& GetTraceMasks();
+
+    // is this trace mask in the list?
+    static bool IsAllowedTraceMask(const wxString& mask);
+
+
+    // log formatting
+    // -----------------
+
+    // Change wxLogFormatter object used by wxLog to format the log messages.
+    //
+    // wxLog takes ownership of the pointer passed in but the caller is
+    // responsible for deleting the returned pointer.
+    wxLogFormatter* SetFormatter(wxLogFormatter* formatter);
+
+
+    // All the time stamp related functions below only work when the default
+    // wxLogFormatter is being used. Defining a custom formatter overrides them
+    // as it could use its own time stamp format or format messages without
+    // using time stamp at all.
+

 
     // sets the time stamp string format: this is used as strftime() format
     // string for the log targets which add time stamps to the messages; set
 
     // sets the time stamp string format: this is used as strftime() format
     // string for the log targets which add time stamps to the messages; set


@@ -254,17 +510,6 @@ public:
     static void DisableTimestamp() { SetTimestamp(wxEmptyString); }
 
 
     static void DisableTimestamp() { SetTimestamp(wxEmptyString); }
 
 

-    // accessors
-
-    // gets the verbose status
-    static bool GetVerbose() { return ms_bVerbose; }
-
-    // is this trace mask in the list?
-    static bool IsAllowedTraceMask(const wxString& mask);
-
-    // return the current loglevel limit
-    static wxLogLevel GetLogLevel() { return ms_logLevel; }
-

     // get the current timestamp format string (maybe empty)
     static const wxString& GetTimestamp() { return ms_timestamp; }
 
     // get the current timestamp format string (maybe empty)
     static const wxString& GetTimestamp() { return ms_timestamp; }
 


@@ -273,9 +518,10 @@ public:
     // helpers: all functions in this section are mostly for internal use only,
     // don't call them from your code even if they are not formally deprecated
 
     // helpers: all functions in this section are mostly for internal use only,
     // don't call them from your code even if they are not formally deprecated
 

-    // put the time stamp into the string if ms_timestamp != NULL (don't
-    // change it otherwise)
+    // put the time stamp into the string if ms_timestamp is not empty (don't
+    // change it otherwise); the first overload uses the current time.

     static void TimeStamp(wxString *str);
     static void TimeStamp(wxString *str);

+    static void TimeStamp(wxString *str, time_t t);

 
     // these methods should only be called from derived classes DoLogRecord(),
     // DoLogTextAtLevel() and DoLogText() implementations respectively and
 
     // these methods should only be called from derived classes DoLogRecord(),
     // DoLogTextAtLevel() and DoLogText() implementations respectively and


@@ -320,17 +566,19 @@ public:
 
 #if WXWIN_COMPATIBILITY_2_6
     // this function doesn't do anything any more, don't call it
 
 #if WXWIN_COMPATIBILITY_2_6
     // this function doesn't do anything any more, don't call it

-    wxDEPRECATED_INLINE(
-        static wxChar *SetLogBuffer(wxChar *, size_t = 0), return NULL;
+    static wxDEPRECATED_INLINE(
+        wxChar *SetLogBuffer(wxChar *, size_t = 0), return NULL;

     );
 #endif // WXWIN_COMPATIBILITY_2_6
 
     // don't use integer masks any more, use string trace masks instead
 #if WXWIN_COMPATIBILITY_2_8
     );
 #endif // WXWIN_COMPATIBILITY_2_6
 
     // don't use integer masks any more, use string trace masks instead
 #if WXWIN_COMPATIBILITY_2_8

-    wxDEPRECATED_INLINE( static void SetTraceMask(wxTraceMask ulMask),
+    static wxDEPRECATED_INLINE( void SetTraceMask(wxTraceMask ulMask),

         ms_ulTraceMask = ulMask; )
         ms_ulTraceMask = ulMask; )

-    wxDEPRECATED_BUT_USED_INTERNALLY_INLINE( static wxTraceMask GetTraceMask(),
-        return ms_ulTraceMask; )
+
+    // this one can't be marked deprecated as it's used in our own wxLogger
+    // below but it still is deprecated and shouldn't be used
+    static wxTraceMask GetTraceMask() { return ms_ulTraceMask; }

 #endif // WXWIN_COMPATIBILITY_2_8
 
 protected:
 #endif // WXWIN_COMPATIBILITY_2_8
 
 protected:


@@ -338,7 +586,7 @@ protected:
     // for every "record", i.e. a unit of log output, to be logged and by
     // default formats the message and passes it to DoLogTextAtLevel() which in
     // turn passes it to DoLogText() by default
     // for every "record", i.e. a unit of log output, to be logged and by
     // default formats the message and passes it to DoLogTextAtLevel() which in
     // turn passes it to DoLogText() by default

-    
+

     // override this method if you want to change message formatting or do
     // dynamic filtering
     virtual void DoLogRecord(wxLogLevel level,
     // override this method if you want to change message formatting or do
     // dynamic filtering
     virtual void DoLogRecord(wxLogLevel level,


@@ -374,11 +622,13 @@ protected:
     wxDEPRECATED_BUT_USED_INTERNALLY_INLINE(
         virtual void DoLogString(const char *WXUNUSED(szString),
                                  time_t WXUNUSED(t)),
     wxDEPRECATED_BUT_USED_INTERNALLY_INLINE(
         virtual void DoLogString(const char *WXUNUSED(szString),
                                  time_t WXUNUSED(t)),

+        wxEMPTY_PARAMETER_VALUE

     )
 
     wxDEPRECATED_BUT_USED_INTERNALLY_INLINE(
         virtual void DoLogString(const wchar_t *WXUNUSED(wzString),
                                  time_t WXUNUSED(t)),
     )
 
     wxDEPRECATED_BUT_USED_INTERNALLY_INLINE(
         virtual void DoLogString(const wchar_t *WXUNUSED(wzString),
                                  time_t WXUNUSED(t)),

+        wxEMPTY_PARAMETER_VALUE

     )
 #endif // WXWIN_COMPATIBILITY_2_8
 
     )
 #endif // WXWIN_COMPATIBILITY_2_8
 


@@ -389,9 +639,37 @@ protected:
     unsigned LogLastRepeatIfNeeded();
 
 private:
     unsigned LogLastRepeatIfNeeded();
 
 private:

-    // implement of LogLastRepeatIfNeeded(): it assumes that the
-    // caller had already locked GetPreviousLogCS()
-    unsigned LogLastRepeatIfNeededUnlocked();
+#if wxUSE_THREADS
+    // called from FlushActive() to really log any buffered messages logged
+    // from the other threads
+    void FlushThreadMessages();
+
+    // these functions are called for non-main thread only by IsEnabled() and
+    // EnableLogging() respectively
+    static bool IsThreadLoggingEnabled();
+    static bool EnableThreadLogging(bool enable = true);
+#endif // wxUSE_THREADS
+
+    // get the active log target for the main thread, auto-creating it if
+    // necessary
+    //
+    // this is called from GetActiveTarget() and OnLog() when they're called
+    // from the main thread
+    static wxLog *GetMainThreadActiveTarget();
+
+    // called from OnLog() if it's called from the main thread or if we have a
+    // (presumably MT-safe) thread-specific logger and by FlushThreadMessages()
+    // when it plays back the buffered messages logged from the other threads
+    void CallDoLogNow(wxLogLevel level,
+                      const wxString& msg,
+                      const wxLogRecordInfo& info);
+
+
+    // variables
+    // ----------------
+
+    wxLogFormatter    *m_formatter; // We own this pointer.
+

 
     // static variables
     // ----------------
 
     // static variables
     // ----------------


@@ -416,9 +694,6 @@ private:
 #if WXWIN_COMPATIBILITY_2_8
     static wxTraceMask ms_ulTraceMask;   // controls wxLogTrace behaviour
 #endif // WXWIN_COMPATIBILITY_2_8
 #if WXWIN_COMPATIBILITY_2_8
     static wxTraceMask ms_ulTraceMask;   // controls wxLogTrace behaviour
 #endif // WXWIN_COMPATIBILITY_2_8

-
-    // currently enabled trace masks
-    static wxArrayString ms_aTraceMasks;

 };
 
 // ----------------------------------------------------------------------------
 };
 
 // ----------------------------------------------------------------------------


@@ -597,15 +872,404 @@ private:
     #include "wx/generic/logg.h"
 #endif // wxUSE_GUI
 
     #include "wx/generic/logg.h"
 #endif // wxUSE_GUI
 

+// ----------------------------------------------------------------------------
+// wxLogger
+// ----------------------------------------------------------------------------
+
+// wxLogger is a helper class used by wxLogXXX() functions implementation,
+// don't use it directly as it's experimental and subject to change (OTOH it
+// might become public in the future if it's deemed to be useful enough)
+
+// contains information about the context from which a log message originates
+// and provides Log() vararg method which forwards to wxLog::OnLog() and passes
+// this context to it
+class wxLogger
+{
+public:
+    // ctor takes the basic information about the log record
+    wxLogger(wxLogLevel level,
+             const char *filename,
+             int line,
+             const char *func,
+             const char *component)
+        : m_level(level),
+          m_info(filename, line, func, component)
+    {
+    }
+
+    // store extra data in our log record and return this object itself (so
+    // that further calls to its functions could be chained)
+    template <typename T>
+    wxLogger& Store(const wxString& key, T val)
+    {
+        m_info.StoreValue(key, val);
+        return *this;
+    }
+
+    // hack for "overloaded" wxLogXXX() functions: calling this method
+    // indicates that we may have an extra first argument preceding the format
+    // string and that if we do have it, we should store it in m_info using the
+    // given key (while by default 0 value will be used)
+    wxLogger& MaybeStore(const wxString& key, wxUIntPtr value = 0)
+    {
+        wxASSERT_MSG( m_optKey.empty(), "can only have one optional value" );
+        m_optKey = key;
+
+        m_info.StoreValue(key, value);
+        return *this;
+    }
+
+
+    // non-vararg function used by wxVLogXXX():
+
+    // log the message at the level specified in the ctor if this log message
+    // is enabled
+    void LogV(const wxString& format, va_list argptr)
+    {
+        // remember that fatal errors can't be disabled
+        if ( m_level == wxLOG_FatalError ||
+                wxLog::IsLevelEnabled(m_level, m_info.component) )
+            DoCallOnLog(format, argptr);
+    }
+
+    // overloads used by functions with optional leading arguments (whose
+    // values are stored in the key passed to MaybeStore())
+    void LogV(long num, const wxString& format, va_list argptr)
+    {
+        Store(m_optKey, num);
+
+        LogV(format, argptr);
+    }
+
+    void LogV(void *ptr, const wxString& format, va_list argptr)
+    {
+        Store(m_optKey, wxPtrToUInt(ptr));
+
+        LogV(format, argptr);
+    }
+
+    void LogVTrace(const wxString& mask, const wxString& format, va_list argptr)
+    {
+        if ( !wxLog::IsAllowedTraceMask(mask) )
+            return;
+
+        Store(wxLOG_KEY_TRACE_MASK, mask);
+
+        LogV(format, argptr);
+    }
+
+
+    // vararg functions used by wxLogXXX():
+
+    // will log the message at the level specified in the ctor
+    //
+    // notice that this function supposes that the caller already checked that
+    // the level was enabled and does no checks itself
+    WX_DEFINE_VARARG_FUNC_VOID
+    (
+        Log,
+        1, (const wxFormatString&),
+        DoLog, DoLogUtf8
+    )
+
+    // same as Log() but with an extra numeric or pointer parameters: this is
+    // used to pass an optional value by storing it in m_info under the name
+    // passed to MaybeStore() and is required to support "overloaded" versions
+    // of wxLogStatus() and wxLogSysError()
+    WX_DEFINE_VARARG_FUNC_VOID
+    (
+        Log,
+        2, (long, const wxFormatString&),
+        DoLogWithNum, DoLogWithNumUtf8
+    )
+
+    // unfortunately we can't use "void *" here as we get overload ambiguities
+    // with Log(wxFormatString, ...) when the first argument is a "char *" or
+    // "wchar_t *" then -- so we only allow passing wxObject here, which is
+    // ugly but fine in practice as this overload is only used by wxLogStatus()
+    // whose first argument is a wxFrame
+    WX_DEFINE_VARARG_FUNC_VOID
+    (
+        Log,
+        2, (wxObject *, const wxFormatString&),
+        DoLogWithPtr, DoLogWithPtrUtf8
+    )
+
+    // log the message at the level specified as its first argument
+    //
+    // as the macros don't have access to the level argument in this case, this
+    // function does check that the level is enabled itself
+    WX_DEFINE_VARARG_FUNC_VOID
+    (
+        LogAtLevel,
+        2, (wxLogLevel, const wxFormatString&),
+        DoLogAtLevel, DoLogAtLevelUtf8
+    )
+
+    // special versions for wxLogTrace() which is passed either string or
+    // integer mask as first argument determining whether the message should be
+    // logged or not
+    WX_DEFINE_VARARG_FUNC_VOID
+    (
+        LogTrace,
+        2, (const wxString&, const wxFormatString&),
+        DoLogTrace, DoLogTraceUtf8
+    )
+
+#if WXWIN_COMPATIBILITY_2_8
+    WX_DEFINE_VARARG_FUNC_VOID
+    (
+        LogTrace,
+        2, (wxTraceMask, const wxFormatString&),
+        DoLogTraceMask, DoLogTraceMaskUtf8
+    )
+#endif // WXWIN_COMPATIBILITY_2_8
+
+#ifdef __WATCOMC__
+    // workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               1, (const wxString&),
+                               (wxFormatString(f1)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               1, (const wxCStrData&),
+                               (wxFormatString(f1)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               1, (const char*),
+                               (wxFormatString(f1)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               1, (const wchar_t*),
+                               (wxFormatString(f1)))
+
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               2, (long, const wxString&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               2, (long, const wxCStrData&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               2, (long, const char *),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               2, (long, const wchar_t *),
+                               (f1, wxFormatString(f2)))
+
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               2, (wxObject *, const wxString&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               2, (wxObject *, const wxCStrData&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               2, (wxObject *, const char *),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               2, (wxObject *, const wchar_t *),
+                               (f1, wxFormatString(f2)))
+
+    WX_VARARG_WATCOM_WORKAROUND(void, LogAtLevel,
+                               2, (wxLogLevel, const wxString&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogAtLevel,
+                               2, (wxLogLevel, const wxCStrData&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogAtLevel,
+                               2, (wxLogLevel, const char *),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogAtLevel,
+                               2, (wxLogLevel, const wchar_t *),
+                               (f1, wxFormatString(f2)))
+
+    WX_VARARG_WATCOM_WORKAROUND(void, LogTrace,
+                               2, (const wxString&, const wxString&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogTrace,
+                               2, (const wxString&, const wxCStrData&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogTrace,
+                               2, (const wxString&, const char *),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogTrace,
+                               2, (const wxString&, const wchar_t *),
+                               (f1, wxFormatString(f2)))
+
+#if WXWIN_COMPATIBILITY_2_8
+    WX_VARARG_WATCOM_WORKAROUND(void, LogTrace,
+                               2, (wxTraceMask, wxTraceMask),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogTrace,
+                               2, (wxTraceMask, const wxCStrData&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogTrace,
+                               2, (wxTraceMask, const char *),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogTrace,
+                               2, (wxTraceMask, const wchar_t *),
+                               (f1, wxFormatString(f2)))
+#endif // WXWIN_COMPATIBILITY_2_8
+#endif // __WATCOMC__
+
+private:
+#if !wxUSE_UTF8_LOCALE_ONLY
+    void DoLog(const wxChar *format, ...)
+    {
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+
+    void DoLogWithNum(long num, const wxChar *format, ...)
+    {
+        Store(m_optKey, num);
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+
+    void DoLogWithPtr(void *ptr, const wxChar *format, ...)
+    {
+        Store(m_optKey, wxPtrToUInt(ptr));
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+
+    void DoLogAtLevel(wxLogLevel level, const wxChar *format, ...)
+    {
+        if ( !wxLog::IsLevelEnabled(level, m_info.component) )
+            return;
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(level, format, argptr);
+        va_end(argptr);
+    }
+
+    void DoLogTrace(const wxString& mask, const wxChar *format, ...)
+    {
+        if ( !wxLog::IsAllowedTraceMask(mask) )
+            return;
+
+        Store(wxLOG_KEY_TRACE_MASK, mask);
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+
+#if WXWIN_COMPATIBILITY_2_8
+    void DoLogTraceMask(wxTraceMask mask, const wxChar *format, ...)
+    {
+        if ( (wxLog::GetTraceMask() & mask) != mask )
+            return;
+
+        Store(wxLOG_KEY_TRACE_MASK, mask);
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+#endif // WXWIN_COMPATIBILITY_2_8
+#endif // !wxUSE_UTF8_LOCALE_ONLY
+
+#if wxUSE_UNICODE_UTF8
+    void DoLogUtf8(const char *format, ...)
+    {
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+
+    void DoLogWithNumUtf8(long num, const char *format, ...)
+    {
+        Store(m_optKey, num);
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+
+    void DoLogWithPtrUtf8(void *ptr, const char *format, ...)
+    {
+        Store(m_optKey, wxPtrToUInt(ptr));
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+
+    void DoLogAtLevelUtf8(wxLogLevel level, const char *format, ...)
+    {
+        if ( !wxLog::IsLevelEnabled(level, m_info.component) )
+            return;
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(level, format, argptr);
+        va_end(argptr);
+    }
+
+    void DoLogTraceUtf8(const wxString& mask, const char *format, ...)
+    {
+        if ( !wxLog::IsAllowedTraceMask(mask) )
+            return;
+
+        Store(wxLOG_KEY_TRACE_MASK, mask);
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+
+#if WXWIN_COMPATIBILITY_2_8
+    void DoLogTraceMaskUtf8(wxTraceMask mask, const char *format, ...)
+    {
+        if ( (wxLog::GetTraceMask() & mask) != mask )
+            return;
+
+        Store(wxLOG_KEY_TRACE_MASK, mask);
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+#endif // WXWIN_COMPATIBILITY_2_8
+#endif // wxUSE_UNICODE_UTF8
+
+    void DoCallOnLog(wxLogLevel level, const wxString& format, va_list argptr)
+    {
+        wxLog::OnLog(level, wxString::FormatV(format, argptr), m_info);
+    }
+
+    void DoCallOnLog(const wxString& format, va_list argptr)
+    {
+        DoCallOnLog(m_level, format, argptr);
+    }
+
+
+    const wxLogLevel m_level;
+    wxLogRecordInfo m_info;
+
+    wxString m_optKey;
+
+    wxDECLARE_NO_COPY_CLASS(wxLogger);
+};
+

 // ============================================================================
 // global functions
 // ============================================================================
 
 // ============================================================================
 // global functions
 // ============================================================================
 

-// ----------------------------------------------------------------------------
-// Log functions should be used by application instead of stdio, iostream &c
-// for log messages for easy redirection
-// ----------------------------------------------------------------------------
-

 // ----------------------------------------------------------------------------
 // get error code/error message from system in a portable way
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // get error code/error message from system in a portable way
 // ----------------------------------------------------------------------------


@@ -617,76 +1281,165 @@ WXDLLIMPEXP_BASE unsigned long wxSysErrorCode();
 WXDLLIMPEXP_BASE const wxChar* wxSysErrorMsg(unsigned long nErrCode = 0);
 
 // ----------------------------------------------------------------------------
 WXDLLIMPEXP_BASE const wxChar* wxSysErrorMsg(unsigned long nErrCode = 0);
 
 // ----------------------------------------------------------------------------

-// define wxLog<level>
+// define wxLog<level>() functions which can be used by application instead of
+// stdio, iostream &c for log messages for easy redirection

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-#define DECLARE_LOG_FUNCTION(level)                                         \
-    extern void WXDLLIMPEXP_BASE                                            \
-    wxDoLog##level##Wchar(const wxChar *format, ...);                       \
-    extern void WXDLLIMPEXP_BASE                                            \
-    wxDoLog##level##Utf8(const char *format, ...);                          \
-    WX_DEFINE_VARARG_FUNC_VOID(wxLog##level,                                \
-                               1, (const wxFormatString&),                  \
-                               wxDoLog##level##Wchar, wxDoLog##level##Utf8) \
-    DECLARE_LOG_FUNCTION_WATCOM(level)                                      \
-    extern void WXDLLIMPEXP_BASE wxVLog##level(const wxString& format,      \
-                                               va_list argptr)
+/*
+    The code below is unreadable because it (unfortunately unavoidably)
+    contains a lot of macro magic but all it does is to define wxLogXXX() such
+    that you can call them as vararg functions to log a message at the
+    corresponding level.
+
+    More precisely, it defines:
+
+        - wxLog{FatalError,Error,Warning,Message,Verbose,Debug}() functions
+        taking the format string and additional vararg arguments if needed.
+        - wxLogGeneric(wxLogLevel level, const wxString& format, ...) which
+        takes the log level explicitly.
+        - wxLogSysError(const wxString& format, ...) and wxLogSysError(long
+        err, const wxString& format, ...) which log a wxLOG_Error severity
+        message with the error message corresponding to the system error code
+        err or the last error.
+        - wxLogStatus(const wxString& format, ...) which logs the message into
+        the status bar of the main application window and its overload
+        wxLogStatus(wxFrame *frame, const wxString& format, ...) which logs it
+        into the status bar of the specified frame.
+        - wxLogTrace(Mask mask, const wxString& format, ...) which only logs
+        the message is the specified mask is enabled. This comes in two kinds:
+        Mask can be a wxString or a long. Both are deprecated.
+
+    In addition, wxVLogXXX() versions of all the functions above are also
+    defined. They take a va_list argument instead of "...".
+ */

 
 

-#ifdef __WATCOMC__
-    // workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351;
-    // can't use WX_WATCOM_ONLY_CODE here because the macro would expand to
-    // something too big for Borland C++ to handle
-    #define DECLARE_LOG_FUNCTION_WATCOM(level)                              \
-        WX_VARARG_WATCOM_WORKAROUND(void, wxLog##level,                     \
-                                   1, (const wxString&),                    \
-                                   (wxFormatString(f1)))                    \
-        WX_VARARG_WATCOM_WORKAROUND(void, wxLog##level,                     \
-                                   1, (const wxCStrData&),                  \
-                                   (wxFormatString(f1)))                    \
-        WX_VARARG_WATCOM_WORKAROUND(void, wxLog##level,                     \
-                                   1, (const char*),                        \
-                                   (wxFormatString(f1)))                    \
-        WX_VARARG_WATCOM_WORKAROUND(void, wxLog##level,                     \
-                                   1, (const wchar_t*),                     \
-                                   (wxFormatString(f1)))
-#else
-    #define DECLARE_LOG_FUNCTION_WATCOM(level)
-#endif
+// creates wxLogger object for the current location
+#define wxMAKE_LOGGER(level) \
+    wxLogger(wxLOG_##level, __FILE__, __LINE__, __WXFUNCTION__, wxLOG_COMPONENT)

 
 

+// this macro generates the expression which logs whatever follows it in
+// parentheses at the level specified as argument
+#define wxDO_LOG(level) wxMAKE_LOGGER(level).Log

 
 

-#define DECLARE_LOG_FUNCTION2_EXP(level, argclass, arg, expdecl)            \
-    extern void expdecl wxDoLog##level##Wchar(argclass arg,                 \
-                                              const wxChar *format, ...);   \
-    extern void expdecl wxDoLog##level##Utf8(argclass arg,                  \
-                                             const char *format, ...);      \
-    WX_DEFINE_VARARG_FUNC_VOID(wxLog##level,                                \
-                               2, (argclass, const wxFormatString&),        \
-                               wxDoLog##level##Wchar, wxDoLog##level##Utf8) \
-    DECLARE_LOG_FUNCTION2_EXP_WATCOM(level, argclass, arg, expdecl)         \
-    extern void expdecl wxVLog##level(argclass arg,                         \
-                                      const wxString& format,               \
-                                      va_list argptr)
+// this is the non-vararg equivalent
+#define wxDO_LOGV(level, format, argptr) \
+    wxMAKE_LOGGER(level).LogV(format, argptr)

 
 

-#ifdef __WATCOMC__
-    // workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351;
-    // can't use WX_WATCOM_ONLY_CODE here because the macro would expand to
-    // something too big for Borland C++ to handle
-    #define DECLARE_LOG_FUNCTION2_EXP_WATCOM(level, argclass, arg, expdecl) \
-        WX_VARARG_WATCOM_WORKAROUND(void, wxLog##level,                     \
-                                   2, (argclass, const wxString&),          \
-                                   (f1, wxFormatString(f2)))                \
-        WX_VARARG_WATCOM_WORKAROUND(void, wxLog##level,                     \
-                                   2, (argclass, const wxCStrData&),        \
-                                   (f1, wxFormatString(f2)))                \
-        WX_VARARG_WATCOM_WORKAROUND(void, wxLog##level,                     \
-                                   2, (argclass, const char*),              \
-                                   (f1, wxFormatString(f2)))                \
-        WX_VARARG_WATCOM_WORKAROUND(void, wxLog##level,                     \
-                                   2, (argclass, const wchar_t*),           \
-                                   (f1, wxFormatString(f2)))
-#else
-    #define DECLARE_LOG_FUNCTION2_EXP_WATCOM(level, argclass, arg, expdecl)
-#endif
+// this macro declares wxLog<level>() macro which logs whatever follows it if
+// logging at specified level is enabled (notice that if it is false, the
+// following arguments are not even evaluated which is good as it avoids
+// unnecessary overhead)
+//
+// Note: the strange if/else construct is needed to make the following code
+//
+//          if ( cond )
+//              wxLogError("!!!");
+//          else
+//              ...
+//
+//       work as expected, without it the second "else" would match the "if"
+//       inside wxLogError(). Unfortunately code like
+//
+//          if ( cond )
+//              wxLogError("!!!");
+//
+//       now provokes "suggest explicit braces to avoid ambiguous 'else'"
+//       warnings from g++ 4.3 and later with -Wparentheses on but they can be
+//       easily fixed by adding curly braces around wxLogError() and at least
+//       the code still does do the right thing.
+#define wxDO_LOG_IF_ENABLED(level)                                            \
+    if ( !wxLog::IsLevelEnabled(wxLOG_##level, wxLOG_COMPONENT) )             \
+    {}                                                                        \
+    else                                                                      \
+        wxDO_LOG(level)
+
+// wxLogFatalError() is special as it can't be disabled
+#define wxLogFatalError wxDO_LOG(FatalError)
+#define wxVLogFatalError(format, argptr) wxDO_LOGV(FatalError, format, argptr)
+
+#define wxLogError wxDO_LOG_IF_ENABLED(Error)
+#define wxVLogError(format, argptr) wxDO_LOGV(Error, format, argptr)
+
+#define wxLogWarning wxDO_LOG_IF_ENABLED(Warning)
+#define wxVLogWarning(format, argptr) wxDO_LOGV(Warning, format, argptr)
+
+#define wxLogMessage wxDO_LOG_IF_ENABLED(Message)
+#define wxVLogMessage(format, argptr) wxDO_LOGV(Message, format, argptr)
+
+// this one is special as it only logs if we're in verbose mode
+#define wxLogVerbose                                                          \
+    if ( !(wxLog::IsLevelEnabled(wxLOG_Info, wxLOG_COMPONENT) &&              \
+            wxLog::GetVerbose()) )                                            \
+    {}                                                                        \
+    else                                                                      \
+        wxDO_LOG(Info)
+#define wxVLogVerbose(format, argptr)                                         \
+    if ( !(wxLog::IsLevelEnabled(wxLOG_Info, wxLOG_COMPONENT) &&              \
+            wxLog::GetVerbose()) )                                            \
+    {}                                                                        \
+    else                                                                      \
+        wxDO_LOGV(Info, format, argptr)
+
+// deprecated synonyms for wxLogVerbose() and wxVLogVerbose()
+#define wxLogInfo wxLogVerbose
+#define wxVLogInfo wxVLogVerbose
+
+
+// another special case: the level is passed as first argument of the function
+// and so is not available to the macro
+//
+// notice that because of this, arguments of wxLogGeneric() are currently
+// always evaluated, unlike for the other log functions
+#define wxLogGeneric wxMAKE_LOGGER(Max).LogAtLevel
+#define wxVLogGeneric(level, format, argptr) \
+    if ( !wxLog::IsLevelEnabled(wxLOG_##level, wxLOG_COMPONENT) )             \
+    {}                                                                        \
+    else                                                                      \
+        wxDO_LOGV(level, format, argptr)
+
+
+// wxLogSysError() needs to stash the error code value in the log record info
+// so it needs special handling too; additional complications arise because the
+// error code may or not be present as the first argument
+//
+// notice that we unfortunately can't avoid the call to wxSysErrorCode() even
+// though it may be unneeded if an explicit error code is passed to us because
+// the message might not be logged immediately (e.g. it could be queued for
+// logging from the main thread later) and so we can't to wait until it is
+// logged to determine whether we have last error or not as it will be too late
+// and it will have changed already by then (in fact it even changes when
+// wxString::Format() is called because of vsnprintf() inside it so it can
+// change even much sooner)
+#define wxLOG_KEY_SYS_ERROR_CODE "wx.sys_error"
+
+#define wxLogSysError                                                         \
+    if ( !wxLog::IsLevelEnabled(wxLOG_Error, wxLOG_COMPONENT) )               \
+    {}                                                                        \
+    else                                                                      \
+        wxMAKE_LOGGER(Error).MaybeStore(wxLOG_KEY_SYS_ERROR_CODE,             \
+                                        wxSysErrorCode()).Log
+
+// unfortunately we can't have overloaded macros so we can't define versions
+// both with and without error code argument and have to rely on LogV()
+// overloads in wxLogger to select between them
+#define wxVLogSysError \
+    wxMAKE_LOGGER(Error).MaybeStore(wxLOG_KEY_SYS_ERROR_CODE, \
+                                    wxSysErrorCode()).LogV
+
+#if wxUSE_GUI
+    // wxLogStatus() is similar to wxLogSysError() as it allows to optionally
+    // specify the frame to which the message should go
+    #define wxLOG_KEY_FRAME "wx.frame"
+
+    #define wxLogStatus                                                       \
+        if ( !wxLog::IsLevelEnabled(wxLOG_Status, wxLOG_COMPONENT) )          \
+        {}                                                                    \
+        else                                                                  \
+            wxMAKE_LOGGER(Status).MaybeStore(wxLOG_KEY_FRAME).Log
+
+    #define wxVLogStatus \
+        wxMAKE_LOGGER(Status).MaybeStore(wxLOG_KEY_FRAME).LogV
+#endif // wxUSE_GUI

 
 
 #else // !wxUSE_LOG
 
 
 #else // !wxUSE_LOG


@@ -697,13 +1450,6 @@ WXDLLIMPEXP_BASE const wxChar* wxSysErrorMsg(unsigned long nErrCode = 0);
 #undef wxUSE_LOG_TRACE
 #define wxUSE_LOG_TRACE 0
 
 #undef wxUSE_LOG_TRACE
 #define wxUSE_LOG_TRACE 0
 

-#ifdef __WATCOMC__
-    // workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351
-    #define WX_WATCOM_ONLY_CODE( x )  x
-#else
-    #define WX_WATCOM_ONLY_CODE( x )
-#endif
-

 #if defined(__WATCOMC__) || defined(__MINGW32__)
     // Mingw has similar problem with wxLogSysError:
     #define WX_WATCOM_OR_MINGW_ONLY_CODE( x )  x
 #if defined(__WATCOMC__) || defined(__MINGW32__)
     // Mingw has similar problem with wxLogSysError:
     #define WX_WATCOM_OR_MINGW_ONLY_CODE( x )  x


@@ -711,28 +1457,47 @@ WXDLLIMPEXP_BASE const wxChar* wxSysErrorMsg(unsigned long nErrCode = 0);
     #define WX_WATCOM_OR_MINGW_ONLY_CODE( x )
 #endif
 
     #define WX_WATCOM_OR_MINGW_ONLY_CODE( x )
 #endif
 

-// log functions do nothing at all
-#define DECLARE_LOG_FUNCTION(level)                                         \
-    WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 1, (const wxString&))           \
+// define macros for defining log functions which do nothing at all
+//
+// WX_WATCOM_ONLY_CODE is needed to work around
+// http://bugzilla.openwatcom.org/show_bug.cgi?id=351
+#define wxDEFINE_EMPTY_LOG_FUNCTION(level)                                  \
+    WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 1, (const wxFormatString&))     \

     WX_WATCOM_ONLY_CODE(                                                    \
         WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 1, (const char*))           \
         WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 1, (const wchar_t*))        \
         WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 1, (const wxCStrData&))     \
     )                                                                       \
     WX_WATCOM_ONLY_CODE(                                                    \
         WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 1, (const char*))           \
         WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 1, (const wchar_t*))        \
         WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 1, (const wxCStrData&))     \
     )                                                                       \

-    inline void wxVLog##level(const wxString& WXUNUSED(format),             \
+    inline void wxVLog##level(const wxFormatString& WXUNUSED(format),       \

                               va_list WXUNUSED(argptr)) { }                 \
 
                               va_list WXUNUSED(argptr)) { }                 \
 

-#define DECLARE_LOG_FUNCTION2_EXP(level, argclass, arg, expdecl)            \
-    WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 2, (argclass, const wxString&)) \
+#define wxDEFINE_EMPTY_LOG_FUNCTION2(level, argclass)                       \
+    WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 2, (argclass, const wxFormatString&)) \

     WX_WATCOM_OR_MINGW_ONLY_CODE(                                           \
         WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 2, (argclass, const char*)) \
         WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 2, (argclass, const wchar_t*)) \
         WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 2, (argclass, const wxCStrData&)) \
     )                                                                       \
     inline void wxVLog##level(argclass WXUNUSED(arg),                       \
     WX_WATCOM_OR_MINGW_ONLY_CODE(                                           \
         WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 2, (argclass, const char*)) \
         WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 2, (argclass, const wchar_t*)) \
         WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 2, (argclass, const wxCStrData&)) \
     )                                                                       \
     inline void wxVLog##level(argclass WXUNUSED(arg),                       \

-                              const wxString& WXUNUSED(format),             \
+                              const wxFormatString& WXUNUSED(format),       \

                               va_list WXUNUSED(argptr)) {}
 
                               va_list WXUNUSED(argptr)) {}
 

+wxDEFINE_EMPTY_LOG_FUNCTION(FatalError);
+wxDEFINE_EMPTY_LOG_FUNCTION(Error);
+wxDEFINE_EMPTY_LOG_FUNCTION(SysError);
+wxDEFINE_EMPTY_LOG_FUNCTION2(SysError, long);
+wxDEFINE_EMPTY_LOG_FUNCTION(Warning);
+wxDEFINE_EMPTY_LOG_FUNCTION(Message);
+wxDEFINE_EMPTY_LOG_FUNCTION(Info);
+wxDEFINE_EMPTY_LOG_FUNCTION(Verbose);
+
+wxDEFINE_EMPTY_LOG_FUNCTION2(Generic, wxLogLevel);
+
+#if wxUSE_GUI
+    wxDEFINE_EMPTY_LOG_FUNCTION(Status);
+    wxDEFINE_EMPTY_LOG_FUNCTION2(Status, wxFrame *);
+#endif // wxUSE_GUI
+

 // Empty Class to fake wxLogNull
 class WXDLLIMPEXP_BASE wxLogNull
 {
 // Empty Class to fake wxLogNull
 class WXDLLIMPEXP_BASE wxLogNull
 {


@@ -749,51 +1514,6 @@ public:
 
 #endif // wxUSE_LOG/!wxUSE_LOG
 
 
 #endif // wxUSE_LOG/!wxUSE_LOG
 

-#define DECLARE_LOG_FUNCTION2(level, argclass, arg)                         \
-    DECLARE_LOG_FUNCTION2_EXP(level, argclass, arg, WXDLLIMPEXP_BASE)
-
-// VC6 produces a warning if we a macro expanding to nothing to
-// DECLARE_LOG_FUNCTION2:
-#if defined(__VISUALC__) && __VISUALC__ < 1300
-    #pragma warning(push)
-    // "not enough actual parameters for macro 'DECLARE_LOG_FUNCTION2_EXP'"
-    #pragma warning(disable:4003)
-#endif
-
-// a generic function for all levels (level is passes as parameter)
-DECLARE_LOG_FUNCTION2(Generic, wxLogLevel, level);
-
-// one function per each level
-DECLARE_LOG_FUNCTION(FatalError);
-DECLARE_LOG_FUNCTION(Error);
-DECLARE_LOG_FUNCTION(Warning);
-DECLARE_LOG_FUNCTION(Message);
-DECLARE_LOG_FUNCTION(Info);
-DECLARE_LOG_FUNCTION(Verbose);
-
-// this function sends the log message to the status line of the top level
-// application frame, if any
-DECLARE_LOG_FUNCTION(Status);
-
-#if wxUSE_GUI
-    // this one is the same as previous except that it allows to explicitly
-    class WXDLLIMPEXP_FWD_CORE wxFrame;
-    // specify the frame to which the output should go
-    DECLARE_LOG_FUNCTION2_EXP(Status, wxFrame *, pFrame, WXDLLIMPEXP_CORE);
-#endif // wxUSE_GUI
-
-// additional one: as wxLogError, but also logs last system call error code
-// and the corresponding error message if available
-DECLARE_LOG_FUNCTION(SysError);
-
-// and another one which also takes the error code (for those broken APIs
-// that don't set the errno (like registry APIs in Win32))
-DECLARE_LOG_FUNCTION2(SysError, long, lErrCode);
-#ifdef __WATCOMC__
-// workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351
-DECLARE_LOG_FUNCTION2(SysError, unsigned long, lErrCode);
-#endif
-

 
 // debug functions can be completely disabled in optimized builds
 
 
 // debug functions can be completely disabled in optimized builds
 


@@ -818,38 +1538,29 @@ DECLARE_LOG_FUNCTION2(SysError, unsigned long, lErrCode);
 #endif
 
 #if wxUSE_LOG_DEBUG
 #endif
 
 #if wxUSE_LOG_DEBUG

-    DECLARE_LOG_FUNCTION(Debug);
+    #define wxLogDebug wxDO_LOG_IF_ENABLED(Debug)
+    #define wxVLogDebug(format, argptr) wxDO_LOGV(Debug, format, argptr)

 #else // !wxUSE_LOG_DEBUG
     #define wxVLogDebug(fmt, valist) wxLogNop()
 
     #ifdef HAVE_VARIADIC_MACROS
         #define wxLogDebug(fmt, ...) wxLogNop()
     #else // !HAVE_VARIADIC_MACROS
 #else // !wxUSE_LOG_DEBUG
     #define wxVLogDebug(fmt, valist) wxLogNop()
 
     #ifdef HAVE_VARIADIC_MACROS
         #define wxLogDebug(fmt, ...) wxLogNop()
     #else // !HAVE_VARIADIC_MACROS

-        WX_DEFINE_VARARG_FUNC_NOP(wxLogDebug, 1, (const wxString&))
+        WX_DEFINE_VARARG_FUNC_NOP(wxLogDebug, 1, (const wxFormatString&))

     #endif
 #endif // wxUSE_LOG_DEBUG/!wxUSE_LOG_DEBUG
 
 #if wxUSE_LOG_TRACE
     #endif
 #endif // wxUSE_LOG_DEBUG/!wxUSE_LOG_DEBUG
 
 #if wxUSE_LOG_TRACE

-    // this version only logs the message if the mask had been added to the
-    // list of masks with AddTraceMask()
-    DECLARE_LOG_FUNCTION2(Trace, const wxString&, mask);
-#ifdef __WATCOMC__
-    // workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351
-    DECLARE_LOG_FUNCTION2(Trace, const char*, mask);
-    DECLARE_LOG_FUNCTION2(Trace, const wchar_t*, mask);
-#endif
-
-    // and this one does nothing if all of level bits are not set in
-    // wxLog::GetActive()->GetTraceMask() -- it's deprecated in favour of
-    // string identifiers
-#if WXWIN_COMPATIBILITY_2_8
-    DECLARE_LOG_FUNCTION2(Trace, wxTraceMask, mask);
-#ifdef __WATCOMC__
-    // workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351
-    DECLARE_LOG_FUNCTION2(Trace, int, mask);
-#endif
-#endif // WXWIN_COMPATIBILITY_2_8
-
+    #define wxLogTrace                                                        \
+        if ( !wxLog::IsLevelEnabled(wxLOG_Trace, wxLOG_COMPONENT) )           \
+        {}                                                                    \
+        else                                                                  \
+            wxMAKE_LOGGER(Trace).LogTrace
+    #define wxVLogTrace                                                       \
+        if ( !wxLog::IsLevelEnabled(wxLOG_Trace, wxLOG_COMPONENT) )           \
+        {}                                                                    \
+        else                                                                  \
+            wxMAKE_LOGGER(Trace).LogVTrace

 #else  // !wxUSE_LOG_TRACE
     #define wxVLogTrace(mask, fmt, valist) wxLogNop()
 
 #else  // !wxUSE_LOG_TRACE
     #define wxVLogTrace(mask, fmt, valist) wxLogNop()
 


@@ -857,9 +1568,9 @@ DECLARE_LOG_FUNCTION2(SysError, unsigned long, lErrCode);
         #define wxLogTrace(mask, fmt, ...) wxLogNop()
     #else // !HAVE_VARIADIC_MACROS
         #if WXWIN_COMPATIBILITY_2_8
         #define wxLogTrace(mask, fmt, ...) wxLogNop()
     #else // !HAVE_VARIADIC_MACROS
         #if WXWIN_COMPATIBILITY_2_8

-        WX_DEFINE_VARARG_FUNC_NOP(wxLogTrace, 2, (wxTraceMask, const wxString&))
+        WX_DEFINE_VARARG_FUNC_NOP(wxLogTrace, 2, (wxTraceMask, const wxFormatString&))

         #endif
         #endif

-        WX_DEFINE_VARARG_FUNC_NOP(wxLogTrace, 2, (const wxString&, const wxString&))
+        WX_DEFINE_VARARG_FUNC_NOP(wxLogTrace, 2, (const wxString&, const wxFormatString&))

         #ifdef __WATCOMC__
         // workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351
         WX_DEFINE_VARARG_FUNC_NOP(wxLogTrace, 2, (const char*, const char*))
         #ifdef __WATCOMC__
         // workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351
         WX_DEFINE_VARARG_FUNC_NOP(wxLogTrace, 2, (const char*, const char*))


@@ -868,10 +1579,6 @@ DECLARE_LOG_FUNCTION2(SysError, unsigned long, lErrCode);
     #endif // HAVE_VARIADIC_MACROS/!HAVE_VARIADIC_MACROS
 #endif // wxUSE_LOG_TRACE/!wxUSE_LOG_TRACE
 
     #endif // HAVE_VARIADIC_MACROS/!HAVE_VARIADIC_MACROS
 #endif // wxUSE_LOG_TRACE/!wxUSE_LOG_TRACE
 

-#if defined(__VISUALC__) && __VISUALC__ < 1300
-    #pragma warning(pop)
-#endif
-

 // wxLogFatalError helper: show the (fatal) error to the user in a safe way,
 // i.e. without using wxMessageBox() for example because it could crash
 void WXDLLIMPEXP_BASE
 // wxLogFatalError helper: show the (fatal) error to the user in a safe way,
 // i.e. without using wxMessageBox() for example because it could crash
 void WXDLLIMPEXP_BASE


@@ -913,5 +1620,14 @@ wxSafeShowMessage(const wxString& title, const wxString& text);
     #undef WX_WATCOM_ONLY_CODE
 #endif
 
     #undef WX_WATCOM_ONLY_CODE
 #endif
 

+// macro which disables debug logging in release builds: this is done by
+// default by wxIMPLEMENT_APP() so usually it doesn't need to be used explicitly
+#if defined(NDEBUG) && wxUSE_LOG_DEBUG
+    #define wxDISABLE_DEBUG_LOGGING_IN_RELEASE_BUILD() \
+        wxLog::SetLogLevel(wxLOG_Info)
+#else // !NDEBUG
+    #define wxDISABLE_DEBUG_LOGGING_IN_RELEASE_BUILD()
+#endif // NDEBUG/!NDEBUG
+

 #endif  // _WX_LOG_H_
 
 #endif  // _WX_LOG_H_