Added wxLog::Get/SetLogLevel

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@18474 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/log.tex

@@ -57,7 +57,7 @@ situations because it may easily lead to a loss of messages.
 \membersection{Logging functions}
 
 There are two functions which must be implemented by any derived class to
-actually process the log messages: \helpref{DoLog}{wxlogdolog} and 
+actually process the log messages: \helpref{DoLog}{wxlogdolog} and
 \helpref{DoLogString}{wxlogdologstring}. The second function receives a string
 which just has to be output in some way and the easiest way to write a new log
 target is to override just this function in the derived class. If more control
@@ -72,7 +72,7 @@ night in the current time zone).
 There also functions to support message buffering. Why are they needed?
 Some of wxLog implementations, most notably the standard wxLogGui class,
 buffer the messages (for example, to avoid showing the user a zillion of modal
-message boxes one after another - which would be really annoying). 
+message boxes one after another - which would be really annoying).
 \helpref{Flush()}{wxlogflush} shows them all and clears the buffer contents.
 Although this function doesn't do anything if the buffer is already empty,
 \helpref{HasPendingMessages()}{wxloghaspendingmessages} is also provided which
@@ -96,9 +96,9 @@ problem.
 
 As for the (real) trace messages, their handling depends on the settings of
 the (application global) {\it trace mask}. There are two ways to specify it:
-either by using \helpref{SetTraceMask}{wxlogsettracemask} and 
+either by using \helpref{SetTraceMask}{wxlogsettracemask} and
-\helpref{GetTraceMask}{wxloggettracemask} and using 
+\helpref{GetTraceMask}{wxloggettracemask} and using
-\helpref{wxLogTrace}{wxlogtrace} which takes an integer mask or by using 
+\helpref{wxLogTrace}{wxlogtrace} which takes an integer mask or by using
 \helpref{AddTraceMask}{wxlogaddtracemask} for string trace masks.
 
 The difference between bit-wise and string trace masks is that a message using
@@ -112,7 +112,7 @@ For example,
 // wxTraceOleCalls is one of standard bit masks
 wxLogTrace(wxTraceRefCount | wxTraceOleCalls, "Active object ref count: %d", nRef);
 \end{verbatim}
-will do something only if the current trace mask contains both 
+will do something only if the current trace mask contains both
 {\tt wxTraceRefCount} and {\tt wxTraceOle}, but
 
 \begin{verbatim}
@@ -131,7 +131,7 @@ the preferred way of working with trace messages. The integer trace mask is
 kept for compatibility and for additional (but very rarely needed) flexibility
 only.
 
-The standard trace masks are given in \helpref{wxLogTrace}{wxlogtrace} 
+The standard trace masks are given in \helpref{wxLogTrace}{wxlogtrace}
 documentation.
 
 Finally, the {\it wxLog::DoLog()} function automatically prepends a time stamp
@@ -145,7 +145,7 @@ format disables timestamping of the messages completely.
 {\bf NB:} Timestamping is disabled for Visual C++ users in debug builds by
 default because otherwise it would be impossible to directly go to the line
 from which the log message was generated by simply clicking in the debugger
-window on the corresponding error message. If you wish to enable it, please use 
+window on the corresponding error message. If you wish to enable it, please use
 \helpref{SetTimestamp}{wxlogsettimestamp} explicitly.
 
 \helpref{AddTraceMask}{wxlogaddtracemask}\\
@@ -171,7 +171,7 @@ window on the corresponding error message. If you wish to enable it, please use
 
 \func{static void}{AddTraceMask}{\param{const wxString\& }{mask}}
 
-Add the {\it mask} to the list of allowed masks for 
+Add the {\it mask} to the list of allowed masks for
 \helpref{wxLogTrace}{wxlogtrace}.
 
 \wxheading{See also}
@@ -182,7 +182,7 @@ Add the {\it mask} to the list of allowed masks for
 
 \func{static void}{ClearTraceMasks}{\void}
 
-Removes all trace masks previously set with 
+Removes all trace masks previously set with
 \helpref{AddTraceMask}{wxlogaddtracemask}.
 
 \wxheading{See also}
@@ -240,7 +240,7 @@ flushed, so Suspend() works as expected with it).
 
 \func{static void}{Resume}{\void}
 
-Resumes logging previously suspended by a call to 
+Resumes logging previously suspended by a call to
 \helpref{Suspend}{wxlogsuspend}. All messages logged in the meanwhile will be
 flushed soon.
 
@@ -253,7 +253,7 @@ of the message as specified in the call of {\it wxLogXXX()} function which
 generated it and {\it timestamp} is the moment when the message was generated.
 
 The base class version prepends the timestamp to the message, adds a prefix
-corresponding to the log level and then calls 
+corresponding to the log level and then calls
 \helpref{DoLogString}{wxlogdologstring} with the resulting string.
 
 \membersection{wxLog::DoLogString}\label{wxlogdologstring}
@@ -263,7 +263,7 @@ corresponding to the log level and then calls
 Called to log the specified string. The timestamp is already included into the
 string but still passed to this function.
 
-A simple implementation may just send the string to {\tt stdout} or, better, 
+A simple implementation may just send the string to {\tt stdout} or, better,
 {\tt stderr}.
 
 \membersection{wxLog::DontCreateOnDemand}\label{wxlogdontcreateondemand}
@@ -274,7 +274,7 @@ Instructs wxLog to not create new log targets on the fly if there is none
 currently. (Almost) for internal use only: it is supposed to be called by the
 application shutdown code.
 
-Note that this function also calls 
+Note that this function also calls
 \helpref{ClearTraceMasks}{wxlogcleartracemasks}.
 
 \membersection{wxLog::Flush}\label{wxlogflush}
@@ -314,6 +314,19 @@ logged as the normal ones instead of being silently dropped.
 
 Returns whether the verbose mode is currently active.
 
+\membersection{wxLog::SetLogLevel}\label{wxlogsetloglevel}
+
+\func{static void}{SetLogLevel}{\param{wxLogLevel }{ logLevel}}
+
+Specifies that log messages with $level > logLevel$ should be ignored
+and not sent to the active log target.
+
+\membersection{wxLog::GetLogLevel}\label{wxloggetloglevel}
+
+\func{static wxLogLevel}{GetLogLevel}{\void}
+
+Returns the current log level limit.
+
 \membersection{wxLog::SetTimestamp}\label{wxlogsettimestamp}
 
 \func{void}{SetTimestamp}{\param{const char * }{ format}}
@@ -345,17 +358,17 @@ for details.
 
 \func{static bool}{IsAllowedTraceMask}{\param{const wxChar *}{mask}}
 
-Returns TRUE if the {\it mask} is one of allowed masks for 
+Returns TRUE if the {\it mask} is one of allowed masks for
 \helpref{wxLogTrace}{wxlogtrace}.
 
-See also: \helpref{AddTraceMask}{wxlogaddtracemask}, 
+See also: \helpref{AddTraceMask}{wxlogaddtracemask},
 \helpref{RemoveTraceMask}{wxlogremovetracemask}
 
 \membersection{wxLog::RemoveTraceMask}\label{wxlogremovetracemask}
 
 \func{static void}{RemoveTraceMask}{\param{const wxString\& }{mask}}
 
-Remove the {\it mask} from the list of allowed masks for 
+Remove the {\it mask} from the list of allowed masks for
 \helpref{wxLogTrace}{wxlogtrace}.
 
 See also: \helpref{AddTraceMask}{wxlogaddtracemask}
@@ -365,7 +378,7 @@ See also: \helpref{AddTraceMask}{wxlogaddtracemask}
 \section{\class{wxLogChain}}\label{wxlogchain}
 
 This simple class allows to chain log sinks, that is to install a new sink but
-keep passing log messages to the old one instead of replacing it completely as 
+keep passing log messages to the old one instead of replacing it completely as
 \helpref{SetActiveTarget}{wxlogsetactivetarget} does.
 
 It is especially useful when you want to divert the logs somewhere (for
@@ -421,7 +434,7 @@ NULL}).
 \constfunc{bool}{IsPassingMessages}{\void}
 
 Returns {\tt TRUE} if the messages are passed to the previously active log
-target (default) or {\tt FALSE} if \helpref{PassMessages}{wxlogchainpassmessages} 
+target (default) or {\tt FALSE} if \helpref{PassMessages}{wxlogchainpassmessages}
 had been called.
 
 \membersection{wxLogChain::PassMessages}\label{wxlogchainpassmessages}
@@ -549,7 +562,7 @@ forwards the log messages to the previously installed one in addition to
 processing them itself.
 
 Unlike \helpref{wxLogChain}{wxlogchain} which is usually used directly as is,
-this class must be derived from to implement \helpref{DoLog}{wxlogdolog} 
+this class must be derived from to implement \helpref{DoLog}{wxlogdolog}
 and/or \helpref{DoLogString}{wxlogdologstring} methods.
 
 \wxheading{Derived from}
@@ -592,7 +605,7 @@ wxWindows applications which send all the output to {\tt stderr}.
 
 \func{}{wxLogStderr}{\param{FILE }{*fp = NULL}}
 
-Constructs a log target which sends all the log messages to the given 
+Constructs a log target which sends all the log messages to the given
 {\tt FILE}. If it is {\tt NULL}, the messages are sent to {\tt stderr}.
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% wxLogStream %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -623,7 +636,7 @@ the standard iostream library support ({\tt wxUSE\_STD\_IOSTREAM} must be on).
 
 \func{}{wxLogStream}{\param{std::ostream }{*ostr = NULL}}
 
-Constructs a log target which sends all the log messages to the given 
+Constructs a log target which sends all the log messages to the given
 output stream. If it is {\tt NULL}, the messages are sent to {\tt cerr}.
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% wxLogTextCtrl %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -692,7 +705,7 @@ Creates the log frame window and starts collecting the messages in it.
 
 \docparam{title}{The title for the log frame}
 
-\docparam{show}{{\tt TRUE} to show the frame initially (default), otherwise 
+\docparam{show}{{\tt TRUE} to show the frame initially (default), otherwise
 \helpref{wxLogWindow::Show}{wxlogwindowshow} must be called later.}
 
 \docparam{passToOld}{{\tt TRUE} to process the log messages normally in addition to

include/wx/log.h

@@ -44,6 +44,14 @@ typedef unsigned long wxLogLevel;
 
 #include "wx/dynarray.h"
 
+#ifndef wxUSE_LOG_DEBUG
+#  ifdef __WXDEBUG__
+#    define wxUSE_LOG_DEBUG 1
+#  else // !__WXDEBUG__
+#    define wxUSE_LOG_DEBUG 0
+#  endif
+#endif
+
 // ----------------------------------------------------------------------------
 // constants
 // ----------------------------------------------------------------------------
@@ -55,12 +63,13 @@ 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_Info,       // informational message (a.k.a. 'Verbose')
     wxLOG_Status,     // informational: might go to the status line of GUI app
+    wxLOG_Info,       // informational message (a.k.a. 'Verbose')
     wxLOG_Debug,      // never shown to the user, disabled in release mode
     wxLOG_Trace,      // trace messages are also only enabled in debug mode
     wxLOG_Progress,   // used for progress indicator (not yet)
-    wxLOG_User = 100  // user defined levels start here
+    wxLOG_User = 100, // user defined levels start here
+    wxLOG_Max = UINT_MAX
 };
 
 // symbolic trace masks - wxLogTrace("foo", "some trace message...") will be
@@ -120,7 +129,7 @@ public:
     // derived classes
     static void OnLog(wxLogLevel level, const wxChar *szString, time_t t)
     {
-        if ( IsEnabled() ) {
+        if ( IsEnabled() && ms_logLevel >= level ) {
             wxLog *pLogger = GetActiveTarget();
             if ( pLogger )
                 pLogger->DoLog(level, szString, t);
@@ -165,6 +174,10 @@ public:
         // 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();
@@ -185,6 +198,7 @@ public:
         // to NULL to disable time stamping completely.
     static void SetTimestamp(const wxChar *ts) { ms_timestamp = ts; }
 
+
     // accessors
         // gets the verbose status
     static bool GetVerbose() { return ms_bVerbose; }
@@ -193,10 +207,13 @@ public:
         // is this trace mask in the list?
     static bool IsAllowedTraceMask(const wxChar *mask)
         { return ms_aTraceMasks.Index(mask) != wxNOT_FOUND; }
+        // 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)
@@ -225,6 +242,8 @@ private:
     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
@@ -539,7 +558,7 @@ DECLARE_LOG_FUNCTION(SysError);
 DECLARE_LOG_FUNCTION2(SysError, long lErrCode);
 
 // debug functions do nothing in release mode
-#ifdef  __WXDEBUG__
+#if wxUSE_LOG_DEBUG
     DECLARE_LOG_FUNCTION(Debug);
 
     // first kind of LogTrace is unconditional: it doesn't check the level,

src/common/log.cpp

@@ -845,6 +845,8 @@ bool            wxLog::ms_doLog        = TRUE;
 bool            wxLog::ms_bAutoCreate  = TRUE;
 bool            wxLog::ms_bVerbose     = FALSE;
 
+wxLogLevel      wxLog::ms_logLevel     = wxLOG_Max;  // log everything by default
+
 size_t          wxLog::ms_suspendCount = 0;
 
 #if wxUSE_GUI