corrected a target name

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

diff --git a/include/wx/log.h b/include/wx/log.h
index 4a390ce922318f8d2c437e636010fdbb6a4810c2..c3ee768cbfdd5678e6372b4b037971893f00ed4d 100644 (file)
--- a/include/wx/log.h
+++ b/include/wx/log.h
@@ -1,25 +1,80 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        log.h
+// Name:        wx/log.h

 // Purpose:     Assorted wxLogXXX functions, and wxLog (sink for logs)
 // Author:      Vadim Zeitlin
 // Modified by:
 // Created:     29/01/98
 // RCS-ID:      $Id$
 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
 // Purpose:     Assorted wxLogXXX functions, and wxLog (sink for logs)
 // Author:      Vadim Zeitlin
 // Modified by:
 // Created:     29/01/98
 // RCS-ID:      $Id$
 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>

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

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

-#ifndef   _WX_LOG_H_
-#define   _WX_LOG_H_
+#ifndef _WX_LOG_H_
+#define _WX_LOG_H_

 
 

-#ifdef  __GNUG__
-    #pragma interface "log.h"
+#include "wx/defs.h"
+
+// ----------------------------------------------------------------------------
+// common constants for use in wxUSE_LOG/!wxUSE_LOG
+// ----------------------------------------------------------------------------
+
+// the trace masks have been superceded by symbolic trace constants, they're
+// for compatibility only andwill be removed soon - do NOT use them
+
+// meaning of different bits of the trace mask (which allows selectively
+// enable/disable some trace messages)
+#define wxTraceMemAlloc 0x0001  // trace memory allocation (new/delete)
+#define wxTraceMessages 0x0002  // trace window messages/X callbacks
+#define wxTraceResAlloc 0x0004  // trace GDI resource allocation
+#define wxTraceRefCount 0x0008  // trace various ref counting operations
+
+#ifdef  __WXMSW__
+    #define wxTraceOleCalls 0x0100  // OLE interface calls

 #endif
 
 #endif
 

-#include <time.h>   // for time_t
+// ----------------------------------------------------------------------------
+// types
+// ----------------------------------------------------------------------------
+
+// NB: these types are needed even if wxUSE_LOG == 0
+typedef unsigned long wxTraceMask;
+typedef unsigned long wxLogLevel;
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+#include "wx/string.h"
+
+#if wxUSE_LOG
+
+#include "wx/arrstr.h"
+
+#ifndef __WXWINCE__
+    #include <time.h>   // for time_t
+#endif

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

+#ifndef wxUSE_LOG_DEBUG
+#  ifdef __WXDEBUG__
+#    define wxUSE_LOG_DEBUG 1
+#  else // !__WXDEBUG__
+#    define wxUSE_LOG_DEBUG 0
+#  endif
+#endif
+
+// ----------------------------------------------------------------------------
+// forward declarations
+// ----------------------------------------------------------------------------
+
+#if wxUSE_GUI
+    class WXDLLIMPEXP_CORE wxTextCtrl;
+    class WXDLLIMPEXP_CORE wxLogFrame;
+    class WXDLLIMPEXP_CORE wxFrame;
+    class WXDLLIMPEXP_CORE wxWindow;
+#endif // wxUSE_GUI
+

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


@@ -31,154 +86,208 @@ enum
     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_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_Info,       // informational message (a.k.a. 'Verbose')

     wxLOG_Status,     // informational: might go to the status line of 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_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_User = 100, // user defined levels start here
+    wxLOG_Max = 10000

 };
 
 // symbolic trace masks - wxLogTrace("foo", "some trace message...") will be
 // discarded unless the string "foo" has been added to the list of allowed
 // ones with AddTraceMask()
 
 };
 
 // symbolic trace masks - wxLogTrace("foo", "some trace message...") will be
 // discarded unless the string "foo" has been added to the list of allowed
 // ones with AddTraceMask()
 

-#define wxTRACE_MemAlloc "memalloc" // trace memory allocation (new/delete)
-#define wxTRACE_Messages "messages" // trace window messages/X callbacks
-#define wxTRACE_ResAlloc "resalloc" // trace GDI resource allocation
-#define wxTRACE_RefCount "refcount" // trace various ref counting operations
-
-#ifdef  __WXMSW__
-    #define wxTRACE_OleCalls "ole"  // OLE interface calls
-#endif
-
-// the trace masks have been superceded by symbolic trace constants, they're
-// for compatibility only andwill be removed soon - do NOT use them
-
-// meaning of different bits of the trace mask (which allows selectively
-// enable/disable some trace messages)
-#define wxTraceMemAlloc 0x0001  // trace memory allocation (new/delete)
-#define wxTraceMessages 0x0002  // trace window messages/X callbacks
-#define wxTraceResAlloc 0x0004  // trace GDI resource allocation
-#define wxTraceRefCount 0x0008  // trace various ref counting operations
+#define wxTRACE_MemAlloc wxT("memalloc") // trace memory allocation (new/delete)
+#define wxTRACE_Messages wxT("messages") // trace window messages/X callbacks
+#define wxTRACE_ResAlloc wxT("resalloc") // trace GDI resource allocation
+#define wxTRACE_RefCount wxT("refcount") // trace various ref counting operations

 
 #ifdef  __WXMSW__
 
 #ifdef  __WXMSW__

-    #define wxTraceOleCalls 0x0100  // OLE interface calls
+    #define wxTRACE_OleCalls wxT("ole")  // OLE interface calls

 #endif
 
 #endif
 

-typedef unsigned long wxTraceMask;
-typedef unsigned long wxLogLevel;
-
-// ----------------------------------------------------------------------------
-// forward declarations
-// ----------------------------------------------------------------------------
-
-class WXDLLEXPORT wxTextCtrl;
-class WXDLLEXPORT wxLogFrame;
-class WXDLLEXPORT wxFrame;
-
-#if wxUSE_IOSTREAMH
-// N.B. BC++ doesn't have istream.h, ostream.h
-#   include <iostream.h>
-#else
-#   include <ostream>
-#   if defined(__VISUALC__) || defined(__MWERKS__)
-        using namespace std;
-#   endif
-#endif
+#include "wx/iosfwrap.h"

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

-class WXDLLEXPORT wxLog
+class WXDLLIMPEXP_BASE wxLog

 {
 public:
     // ctor
 {
 public:
     // ctor

-    wxLog();
+    wxLog(){}
+
+    // Internal buffer.
+
+    // Allow replacement of the fixed size static buffer with
+    // a user allocated one.  Pass in NULL to restore the
+    // built in static buffer.
+    static wxChar *SetLogBuffer( wxChar *buf, size_t size = 0 );

 
     // these functions allow to completely disable all log messages
 
     // these functions allow to completely disable all log messages

-        // is logging disabled now?
+
+    // is logging disabled now?

     static bool IsEnabled() { return ms_doLog; }
     static bool IsEnabled() { return ms_doLog; }

-        // change the flag state, return the previous one
-    static bool EnableLogging(bool doIt = TRUE)
-        { bool doLogOld = ms_doLog; ms_doLog = doIt; return doLogOld; }
+
+    // change the flag state, return the previous one
+    static bool EnableLogging(bool doIt = true)
+    { bool doLogOld = ms_doLog; ms_doLog = doIt; return doLogOld; }

 
     // static sink function - see DoLog() for function to overload in the
     // derived classes
 
     // static sink function - see DoLog() for function to overload in the
     // derived classes

-    static void OnLog(wxLogLevel level, const char *szString, time_t t)
-    {
-        if ( IsEnabled() ) {
-            wxLog *pLogger = GetActiveTarget();
-            if ( pLogger )
-                pLogger->DoLog(level, szString, t);
-        }
-    }
+    static void OnLog(wxLogLevel level, const wxChar *szString, time_t t);

 
     // message buffering
 
     // message buffering

-        // flush shows all messages if they're not logged immediately (FILE
-        // and iostream logs don't need it, but wxGuiLog does to avoid showing
-        // 17 modal dialogs one after another)
+
+    // flush shows all messages if they're not logged immediately (FILE
+    // and iostream logs don't need it, but wxGuiLog does to avoid showing
+    // 17 modal dialogs one after another)

     virtual void Flush();
     virtual void Flush();

-        // call to Flush() may be optimized: call it only if this function
-        // returns true (although Flush() also returns immediately if there is
-        // no messages, this functions is more efficient because inline)
-    bool HasPendingMessages() const { return m_bHasMessages; }
+
+    // flush the active target if any
+    static void FlushActive()
+    {
+        if ( !ms_suspendCount )
+        {
+            wxLog *log = GetActiveTarget();
+            if ( log )
+                log->Flush();
+        }
+    }

 
     // only one sink is active at each moment
 
     // only one sink is active at each moment

-        // get current log target, will call wxApp::CreateLogTarget() to
-        // create one if none exists
+    // get current log target, will call wxApp::CreateLogTarget() to
+    // create one if none exists

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

-        // change log target, pLogger may be NULL
+
+    // change log target, pLogger may be NULL

     static wxLog *SetActiveTarget(wxLog *pLogger);
 
     static wxLog *SetActiveTarget(wxLog *pLogger);
 

+    // suspend the message flushing of the main target until the next call
+    // to Resume() - this is mainly for internal use (to prevent wxYield()
+    // from flashing the messages)
+    static void Suspend() { ms_suspendCount++; }
+
+    // must be called for each Suspend()!
+    static void Resume() { ms_suspendCount--; }
+

     // functions controlling the default wxLog behaviour
     // functions controlling the default wxLog behaviour

-        // verbose mode is activated by standard command-line '-verbose'
-        // option
-    void SetVerbose(bool bVerbose = TRUE) { m_bVerbose = bVerbose; }
-        // should GetActiveTarget() try to create a new log object if the
-        // current is NULL?
-    static void DontCreateOnDemand() { ms_bAutoCreate = FALSE; }
-
-        // trace mask (see wxTraceXXX constants for details)
+    // 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();
+
+    // log the count of repeating messages instead of logging the messages
+    // multiple times
+    static void SetRepetitionCounting(bool bRepetCounting = true)
+    { ms_bRepetCounting = bRepetCounting; }
+
+    // gets duplicate counting status
+    static bool GetRepetitionCounting() { return ms_bRepetCounting; }
+
+    // trace mask (see wxTraceXXX constants for details)

     static void SetTraceMask(wxTraceMask ulMask) { ms_ulTraceMask = ulMask; }
     static void SetTraceMask(wxTraceMask ulMask) { ms_ulTraceMask = ulMask; }

-        // add string trace mask
-    static void AddTraceMask(const wxString& str) { ms_aTraceMasks.Add(str); }
-        // add string trace mask
+
+    // add string trace mask
+    static void AddTraceMask(const wxString& str)
+    { ms_aTraceMasks.push_back(str); }
+
+    // add string trace mask

     static void RemoveTraceMask(const wxString& str);
 
     static void RemoveTraceMask(const wxString& str);
 

+    // remove all string trace masks
+    static void ClearTraceMasks();
+
+    // get string trace masks
+    static const wxArrayString &GetTraceMasks() { return ms_aTraceMasks; }
+
+    // sets the timestamp string: this is used as strftime() format string
+    // for the log targets which add time stamps to the messages - set it
+    // to NULL to disable time stamping completely.
+    static void SetTimestamp(const wxChar *ts) { ms_timestamp = ts; }
+
+

     // accessors
     // accessors

-        // gets the verbose status
-    bool GetVerbose() const { return m_bVerbose; }
-        // get trace mask
+
+    // gets the verbose status
+    static bool GetVerbose() { return ms_bVerbose; }
+
+    // get trace mask

     static wxTraceMask GetTraceMask() { return ms_ulTraceMask; }
     static wxTraceMask GetTraceMask() { return ms_ulTraceMask; }

-        // is this trace mask in the list?
-    static bool IsAllowedTraceMask(const char *mask)
-        { return ms_aTraceMasks.Index(mask) != wxNOT_FOUND; }
+
+    // is this trace mask in the list?
+    static bool IsAllowedTraceMask(const wxChar *mask);
+
+    // return the current loglevel limit
+    static wxLogLevel GetLogLevel() { return ms_logLevel; }
+
+    // get the current timestamp format string (may be NULL)
+    static const wxChar *GetTimestamp() { return ms_timestamp; }
+
+
+    // helpers
+
+    // put the time stamp into the string if ms_timestamp != NULL (don't
+    // change it otherwise)
+    static void TimeStamp(wxString *str);

 
     // make dtor virtual for all derived classes
 
     // make dtor virtual for all derived classes

-    virtual ~wxLog() { }
+    virtual ~wxLog();

 
 

-protected:
-    bool m_bHasMessages; // any messages in the queue?
-    bool m_bVerbose;     // FALSE => ignore LogInfo messages

 
 

+    // this method exists for backwards compatibility only, don't use
+    bool HasPendingMessages() const { return true; }
+
+protected:

     // the logging functions that can be overriden
     // the logging functions that can be overriden

-        // default DoLog() prepends the time stamp and a prefix corresponding
-        // to the message to szString and then passes it to DoLogString()
-    virtual void DoLog(wxLogLevel level, const char *szString, time_t t);
-        // default DoLogString does nothing but is not pure virtual because if
-        // you override DoLog() you might not need it at all
-    virtual void DoLogString(const char *szString, time_t t);
+
+    // default DoLog() prepends the time stamp and a prefix corresponding
+    // to the message to szString and then passes it to DoLogString()
+    virtual void DoLog(wxLogLevel level, const wxChar *szString, time_t t);
+
+    // default DoLogString does nothing but is not pure virtual because if
+    // you override DoLog() you might not need it at all
+    virtual void DoLogString(const wxChar *szString, time_t t);
+
+    // log a line containing the number of times the previous message was
+    // repeated
+    // returns: the number
+    static unsigned DoLogNumberOfRepeats();

 
 private:
     // static variables
     // ----------------
 
 
 private:
     // static variables
     // ----------------
 

+    // traditional behaviour or counting repetitions
+    static bool        ms_bRepetCounting;
+    static wxString    ms_prevString;   // previous message that was logged
+    // how many times the previous message was logged
+    static unsigned    ms_prevCounter;
+    static time_t      ms_prevTimeStamp;// timestamp of the previous message
+    static wxLogLevel  ms_prevLevel;    // level of the previous message
+

     static wxLog      *ms_pLogger;      // currently active log sink
     static wxLog      *ms_pLogger;      // currently active log sink

-    static bool        ms_doLog;        // FALSE => all logging disabled
+    static bool        ms_doLog;        // false => all logging disabled

     static bool        ms_bAutoCreate;  // create new log targets on demand?
     static bool        ms_bAutoCreate;  // create new log targets on demand?

+    static bool        ms_bVerbose;     // false => ignore LogInfo messages
+
+    static wxLogLevel  ms_logLevel;     // limit logging to levels <= ms_logLevel
+
+    static size_t      ms_suspendCount; // if positive, logs are not flushed
+
+    // format string for strftime(), if NULL, time stamping log messages is
+    // disabled
+    static const wxChar *ms_timestamp;

 
     static wxTraceMask ms_ulTraceMask;   // controls wxLogTrace behaviour
     static wxArrayString ms_aTraceMasks; // more powerful filter for wxLogTrace
 
     static wxTraceMask ms_ulTraceMask;   // controls wxLogTrace behaviour
     static wxArrayString ms_aTraceMasks; // more powerful filter for wxLogTrace


@@ -188,156 +297,158 @@ private:
 // "trivial" derivations of wxLog
 // ----------------------------------------------------------------------------
 
 // "trivial" derivations of wxLog
 // ----------------------------------------------------------------------------
 

+// log everything to a buffer
+class WXDLLIMPEXP_BASE wxLogBuffer : public wxLog
+{
+public:
+    wxLogBuffer() { }
+
+    // get the string contents with all messages logged
+    const wxString& GetBuffer() const { return m_str; }
+
+    // show the buffer contents to the user in the best possible way (this uses
+    // wxMessageOutputMessageBox) and clear it
+    virtual void Flush();
+
+protected:
+    virtual void DoLog(wxLogLevel level, const wxChar *szString, time_t t);
+    virtual void DoLogString(const wxChar *szString, time_t t);
+
+private:
+    wxString m_str;
+
+    DECLARE_NO_COPY_CLASS(wxLogBuffer)
+};
+
+

 // log everything to a "FILE *", stderr by default
 // log everything to a "FILE *", stderr by default

-class WXDLLEXPORT wxLogStderr : public wxLog
+class WXDLLIMPEXP_BASE wxLogStderr : public wxLog

 {
 public:
     // redirect log output to a FILE
     wxLogStderr(FILE *fp = (FILE *) NULL);
 
 {
 public:
     // redirect log output to a FILE
     wxLogStderr(FILE *fp = (FILE *) NULL);
 

-private:
+protected:

     // implement sink function
     // implement sink function

-    virtual void DoLogString(const char *szString, time_t t);
+    virtual void DoLogString(const wxChar *szString, time_t t);

 
     FILE *m_fp;
 
     FILE *m_fp;

+
+    DECLARE_NO_COPY_CLASS(wxLogStderr)

 };
 
 #if wxUSE_STD_IOSTREAM
 };
 
 #if wxUSE_STD_IOSTREAM

+

 // log everything to an "ostream", cerr by default
 // log everything to an "ostream", cerr by default

-class WXDLLEXPORT wxLogStream : public wxLog
+class WXDLLIMPEXP_BASE wxLogStream : public wxLog

 {
 public:
     // redirect log output to an ostream
 {
 public:
     // redirect log output to an ostream

-    wxLogStream(ostream *ostr = (ostream *) NULL);
+    wxLogStream(wxSTD ostream *ostr = (wxSTD ostream *) NULL);

 
 protected:
     // implement sink function
 
 protected:
     // implement sink function

-    virtual void DoLogString(const char *szString, time_t t);
+    virtual void DoLogString(const wxChar *szString, time_t t);

 
     // using ptr here to avoid including <iostream.h> from this file
 
     // using ptr here to avoid including <iostream.h> from this file

-    ostream *m_ostr;
+    wxSTD ostream *m_ostr;

 };
 };

-#endif

 
 

-#ifndef wxUSE_NOGUI
-
-#if wxUSE_STD_IOSTREAM
-// log everything to a text window (GUI only of course)
-class WXDLLEXPORT wxLogTextCtrl : public wxLogStream
-{
-public:
-    // we just create an ostream from wxTextCtrl and use it in base class
-    wxLogTextCtrl(wxTextCtrl *pTextCtrl);
-    ~wxLogTextCtrl();
-};
-#endif
+#endif // wxUSE_STD_IOSTREAM

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

-// GUI log target, the default one for wxWindows programs
+// /dev/null log target: suppress logging until this object goes out of scope

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

-class WXDLLEXPORT wxLogGui : public wxLog
-{
-public:
-    // ctor
-    wxLogGui();

 
 

-    // show all messages that were logged since the last Flush()
-    virtual void Flush();
+// example of usage:
+/*
+    void Foo()
+    {
+        wxFile file;

 
 

-protected:
-    virtual void DoLog(wxLogLevel level, const char *szString, time_t t);
+        // wxFile.Open() normally complains if file can't be opened, we don't
+        // want it
+        wxLogNull logNo;
+
+        if ( !file.Open("bar") )
+            ... process error ourselves ...

 
 

-    // empty everything
-    void Clear();
+        // ~wxLogNull called, old log sink restored
+    }
+ */
+class WXDLLIMPEXP_BASE wxLogNull
+{
+public:
+    wxLogNull() : m_flagOld(wxLog::EnableLogging(false)) { }
+    ~wxLogNull() { (void)wxLog::EnableLogging(m_flagOld); }

 
 

-    wxArrayString m_aMessages;
-    wxArrayLong   m_aTimes;
-    bool          m_bErrors,        // do we have any errors?
-                  m_bWarnings;      // any warnings?
+private:
+    bool m_flagOld; // the previous value of the wxLog::ms_doLog

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

-// (background) log window: this class forwards all log messages to the log
-// target which was active when it was instantiated, but also collects them
-// to the log window. This window has it's own menu which allows the user to
-// close it, clear the log contents or save it to the file.
+// chaining log target: installs itself as a log target and passes all
+// messages to the real log target given to it in the ctor but also forwards
+// them to the previously active one
+//
+// note that you don't have to call SetActiveTarget() with this class, it
+// does it itself in its ctor

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

-class WXDLLEXPORT wxLogWindow : public wxLog
+
+class WXDLLIMPEXP_BASE wxLogChain : public wxLog

 {
 public:
 {
 public:

-    wxLogWindow(wxFrame *pParent,         // the parent frame (can be NULL)
-            const char *szTitle,      // the title of the frame
-            bool bShow = TRUE,        // show window immediately?
-            bool bPassToOld = TRUE);  // pass log messages to the old target?
-    ~wxLogWindow();
-
-    // window operations
-    // show/hide the log window
-    void Show(bool bShow = TRUE);
-    // retrieve the pointer to the frame
-    wxFrame *GetFrame() const;
+    wxLogChain(wxLog *logger);
+    virtual ~wxLogChain();
+
+    // change the new log target
+    void SetLog(wxLog *logger);
+
+    // this can be used to temporarily disable (and then reenable) passing
+    // messages to the old logger (by default we do pass them)
+    void PassMessages(bool bDoPass) { m_bPassMessages = bDoPass; }

 
 

-    // accessors
-    // the previous log target (may be NULL)
-    wxLog *GetOldLog() const { return m_pOldLog; }

     // are we passing the messages to the previous log target?
     bool IsPassingMessages() const { return m_bPassMessages; }
 
     // are we passing the messages to the previous log target?
     bool IsPassingMessages() const { return m_bPassMessages; }
 

-    // we can pass the messages to the previous log target (we're in this mode by
-    // default: we collect all messages in the window, but also let the default
-    // processing take place)
-    void PassMessages(bool bDoPass) { m_bPassMessages = bDoPass; }
+    // return the previous log target (may be NULL)
+    wxLog *GetOldLog() const { return m_logOld; }

 
 

-    // base class virtuals
-    // we don't need it ourselves, but we pass it to the previous logger
+    // override base class version to flush the old logger as well

     virtual void Flush();
 
     virtual void Flush();
 

-    // overridables
-    // called immediately after the log frame creation allowing for
-    // any extra initializations
-    virtual void OnFrameCreate(wxFrame *frame);
-    // called right before the log frame is going to be deleted
-    virtual void OnFrameDelete(wxFrame *frame);
-

 protected:
 protected:

-    virtual void DoLog(wxLogLevel level, const char *szString, time_t t);
-    virtual void DoLogString(const char *szString, time_t t);
+    // pass the chain to the old logger if needed
+    virtual void DoLog(wxLogLevel level, const wxChar *szString, time_t t);

 
 private:
 
 private:

-    bool        m_bPassMessages;  // pass messages to m_pOldLog?
-    wxLog      *m_pOldLog;        // previous log target
-    wxLogFrame *m_pLogFrame;      // the log frame
-};
+    // the current log target
+    wxLog *m_logNew;

 
 

-#endif // wxUSE_NOGUI
+    // the previous log target
+    wxLog *m_logOld;

 
 

-// ----------------------------------------------------------------------------
-// /dev/null log target: suppress logging until this object goes out of scope
-// ----------------------------------------------------------------------------
+    // do we pass the messages to the old logger?
+    bool m_bPassMessages;

 
 

-// example of usage:
-/*
-   void Foo() {
-   wxFile file;
-
-// wxFile.Open() normally complains if file can't be opened, we don't want it
-wxLogNull logNo;
-if ( !file.Open("bar") )
-... process error ourselves ...
+    DECLARE_NO_COPY_CLASS(wxLogChain)
+};

 
 

-// ~wxLogNull called, old log sink restored
-}
- */
-class WXDLLEXPORT wxLogNull
+// a chain log target which uses itself as the new logger
+class WXDLLIMPEXP_BASE wxLogPassThrough : public wxLogChain

 {
 public:
 {
 public:

-    wxLogNull() { m_flagOld = wxLog::EnableLogging(FALSE); }
-    ~wxLogNull() { (void)wxLog::EnableLogging(m_flagOld);   }
+    wxLogPassThrough();

 
 private:
 
 private:

-    bool m_flagOld; // the previous value of the wxLog::ms_doLog
+    DECLARE_NO_COPY_CLASS(wxLogPassThrough)

 };
 
 };
 

+#if wxUSE_GUI
+    // include GUI log targets:
+    #include "wx/generic/logg.h"
+#endif // wxUSE_GUI
+

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


@@ -347,93 +458,162 @@ private:
 // for log messages for easy redirection
 // ----------------------------------------------------------------------------
 
 // for log messages for easy redirection
 // ----------------------------------------------------------------------------
 

+// ----------------------------------------------------------------------------
+// get error code/error message from system in a portable way
+// ----------------------------------------------------------------------------
+
+// return the last system error code
+WXDLLIMPEXP_BASE unsigned long wxSysErrorCode();
+
+// return the error message for given (or last if 0) error code
+WXDLLIMPEXP_BASE const wxChar* wxSysErrorMsg(unsigned long nErrCode = 0);
+
+// ----------------------------------------------------------------------------

 // define wxLog<level>
 // define wxLog<level>

-// -------------------
+// ----------------------------------------------------------------------------
+
+#define DECLARE_LOG_FUNCTION(level)                                         \
+extern void WXDLLIMPEXP_BASE wxVLog##level(const wxChar *szFormat,          \
+                                           va_list argptr);                 \
+extern void WXDLLIMPEXP_BASE wxLog##level(const wxChar *szFormat,           \
+                                          ...) ATTRIBUTE_PRINTF_1
+#define DECLARE_LOG_FUNCTION2_EXP(level, argclass, arg, expdecl)            \
+extern void expdecl wxVLog##level(argclass arg,                             \
+                                  const wxChar *szFormat,                   \
+                                  va_list argptr);                          \
+extern void expdecl wxLog##level(argclass arg,                              \
+                                 const wxChar *szFormat,                    \
+                                 ...) ATTRIBUTE_PRINTF_2
+#else // !wxUSE_LOG
+
+// log functions do nothing at all
+#define DECLARE_LOG_FUNCTION(level)                                         \
+inline void wxVLog##level(const wxChar *WXUNUSED(szFormat),                 \
+                          va_list WXUNUSED(argptr)) { }                     \
+inline void wxLog##level(const wxChar *WXUNUSED(szFormat),                  \
+                         ...) { }
+#define DECLARE_LOG_FUNCTION2_EXP(level, argclass, arg, expdecl)            \
+inline void wxVLog##level(argclass WXUNUSED(arg),                           \
+                          const wxChar *WXUNUSED(szFormat),                 \
+                          va_list WXUNUSED(argptr)) {}                      \
+inline void wxLog##level(argclass WXUNUSED(arg),                            \
+                         const wxChar *WXUNUSED(szFormat),                  \
+                         ...) { }
+
+// Empty Class to fake wxLogNull
+class WXDLLIMPEXP_BASE wxLogNull
+{
+public:
+    wxLogNull() { }
+};

 
 

-#define DECLARE_LOG_FUNCTION(level)                                 \
-extern void WXDLLEXPORT wxLog##level(const char *szFormat, ...)
-#define DECLARE_LOG_FUNCTION2(level, arg1)                          \
-extern void WXDLLEXPORT wxLog##level(arg1, const char *szFormat, ...)
+// Dummy macros to replace some functions.
+#define wxSysErrorCode() (unsigned long)0
+#define wxSysErrorMsg( X ) (const wxChar*)NULL

 
 

-    // a generic function for all levels (level is passes as parameter)
-    DECLARE_LOG_FUNCTION2(Generic, wxLogLevel level);
+// Fake symbolic trace masks... for those that are used frequently
+#define wxTRACE_OleCalls wxEmptyString // OLE interface calls

 
 

-    // 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);
+#endif // wxUSE_LOG/!wxUSE_LOG
+#define DECLARE_LOG_FUNCTION2(level, argclass, arg)                         \
+    DECLARE_LOG_FUNCTION2_EXP(level, argclass, arg, WXDLLIMPEXP_BASE)

 
 

-    // this function sends the log message to the status line of the top level
-    // application frame, if any
-    DECLARE_LOG_FUNCTION(Status);

 
 

+// 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
     // this one is the same as previous except that it allows to explicitly

+    class WXDLLEXPORT wxFrame;

     // specify the frame to which the output should go
     // specify the frame to which the output should go

-    DECLARE_LOG_FUNCTION2(Status, wxFrame *pFrame);
+    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);
+// 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);
+// 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);

 
 

-    // debug functions do nothing in release mode
-#ifdef  __WXDEBUG__
+// debug functions do nothing in release mode
+#if wxUSE_LOG_DEBUG

     DECLARE_LOG_FUNCTION(Debug);
 
     DECLARE_LOG_FUNCTION(Debug);
 

-    // first king of LogTrace is uncoditional: it doesn't check the level,
-    DECLARE_LOG_FUNCTION(Trace);
+    // there is no more unconditional LogTrace: it is not different from
+    // LogDebug and it creates overload ambiguities
+    //DECLARE_LOG_FUNCTION(Trace);

 
 

-    // this second version will only log the message if the mask had been
-    // added to the list of masks with AddTraceMask()
-    DECLARE_LOG_FUNCTION2(Trace, const char *mask);
+    // this version only logs the message if the mask had been added to the
+    // list of masks with AddTraceMask()
+    DECLARE_LOG_FUNCTION2(Trace, const wxChar *, mask);

 
 

-    // the last one does nothing if all of level bits are not set
-    // in wxLog::GetActive()->GetTraceMask() - it's deprecated in favour of
+    // 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
     // string identifiers

-    DECLARE_LOG_FUNCTION2(Trace, wxTraceMask mask);
+    DECLARE_LOG_FUNCTION2(Trace, wxTraceMask, mask);

 #else   //!debug
     // these functions do nothing in release builds
 #else   //!debug
     // these functions do nothing in release builds

-    inline void wxLogDebug(const char *, ...) { }
-    inline void wxLogTrace(const char *, ...) { }
-    inline void wxLogTrace(wxTraceMask, const char *, ...) { }
-    inline void wxLogTrace(const char *, const char *, ...) { }
-#endif
-
-
-    // are we in 'verbose' mode?
-    // (note that it's often handy to change this var manually from the
-    //  debugger, thus enabling/disabling verbose reporting for some
-    //  parts of the program only)
-    WXDLLEXPORT_DATA(extern bool) g_bVerbose;

 
 

-    // ----------------------------------------------------------------------------
-    // get error code/error message from system in a portable way
-    // ----------------------------------------------------------------------------
+    // note that leaving out "fmt" in the vararg functions provokes a warning
+    // from SGI CC: "the last argument of the varargs function is unnamed"
+    inline void wxVLogDebug(const wxChar *, va_list) { }
+    inline void wxLogDebug(const wxChar *fmt, ...) { wxUnusedVar(fmt); }
+    inline void wxVLogTrace(wxTraceMask, const wxChar *, va_list) { }
+    inline void wxLogTrace(wxTraceMask, const wxChar *fmt, ...) { wxUnusedVar(fmt); }
+    inline void wxVLogTrace(const wxChar *, const wxChar *, va_list) { }
+    inline void wxLogTrace(const wxChar *, const wxChar *fmt, ...) { wxUnusedVar(fmt); }
+#endif // debug/!debug
+
+// 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
+wxSafeShowMessage(const wxString& title, const wxString& text);

 
 

-    // return the last system error code
-    WXDLLEXPORT unsigned long wxSysErrorCode();
-    // return the error message for given (or last if 0) error code
-    WXDLLEXPORT const char* wxSysErrorMsg(unsigned long nErrCode = 0);
+// ----------------------------------------------------------------------------
+// debug only logging functions: use them with API name and error code
+// ----------------------------------------------------------------------------

 
 

-    // ----------------------------------------------------------------------------
-    // debug only logging functions: use them with API name and error code
-    // ----------------------------------------------------------------------------
+#ifdef __WXDEBUG__
+    // make life easier for people using VC++ IDE: clicking on the message
+    // will take us immediately to the place of the failed API
+#ifdef __VISUALC__
+    #define wxLogApiError(api, rc)                                            \
+        wxLogDebug(wxT("%s(%d): '%s' failed with error 0x%08lx (%s)."),       \
+                   __TFILE__, __LINE__, api,                                  \
+                   (long)rc, wxSysErrorMsg(rc))
+#else // !VC++
+    #define wxLogApiError(api, rc)                                            \
+        wxLogDebug(wxT("In file %s at line %d: '%s' failed with ")            \
+                   wxT("error 0x%08lx (%s)."),                                \
+                   __TFILE__, __LINE__, api,                                  \
+                   (long)rc, wxSysErrorMsg(rc))
+#endif // VC++/!VC++
+
+    #define wxLogLastError(api) wxLogApiError(api, wxSysErrorCode())

 
 

-#ifdef  __WXDEBUG__
-#define wxLogApiError(api, rc)                                              \
-    wxLogDebug("At %s(%d) '%s' failed with error %lx (%s).",  \
-            __FILE__, __LINE__, api,                       \
-            rc, wxSysErrorMsg(rc))
-#define wxLogLastError(api) wxLogApiError(api, wxSysErrorCode())

 #else   //!debug
 #else   //!debug

-    inline void wxLogApiError(const char *, long) { }
-    inline void wxLogLastError(const char *) { }
+    inline void wxLogApiError(const wxChar *, long) { }
+    inline void wxLogLastError(const wxChar *) { }

 #endif  //debug/!debug
 
 #endif  //debug/!debug
 

+// wxCocoa has additiional trace masks
+#if defined(__WXCOCOA__)
+#include "wx/cocoa/log.h"
+#endif
+

 #endif  // _WX_LOG_H_
 #endif  // _WX_LOG_H_

+