X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/4ffdb64018ac4e4d76c57914d02f8547bf445683..36a0190ebd5bd9a7302f60f6dcd608b80574e21c:/interface/wx/log.h?ds=sidebyside diff --git a/interface/wx/log.h b/interface/wx/log.h index 314f82e24f..7dbed9bc56 100644 --- a/interface/wx/log.h +++ b/interface/wx/log.h @@ -2,10 +2,10 @@ // Name: log.h // Purpose: interface of wxLog* classes // Author: wxWidgets team -// RCS-ID: $Id$ // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// +#if wxUSE_BASE /** Different standard log levels (you may also define your own) used with @@ -69,1120 +69,1118 @@ public: }; /** - @class wxLogWindow + @class wxLogFormatter - This class represents a background log window: to be precise, it collects all - log messages in the log frame which it manages but also passes them on to the - log target which was active at the moment of its creation. This allows you, for - example, to show all the log messages in a frame but still continue to process - them normally by showing the standard log dialog. + wxLogFormatter class is used to format the log messages. It implements the + default formatting and can be derived from to create custom formatters. + + The default implementation formats the message into a string containing + the time stamp, level-dependent prefix and the message itself. + + To change it, you can derive from it and override its Format() method. For + example, to include the thread id in the log messages you can use + @code + class LogFormatterWithThread : public wxLogFormatter + { + virtual wxString Format(wxLogLevel level, + const wxString& msg, + const wxLogRecordInfo& info) const + { + return wxString::Format("[%d] %s(%d) : %s", + info.threadId, info.filename, info.line, msg); + } + }; + @endcode + And then associate it with wxLog instance using its SetFormatter(). Then, + if you call: + + @code + wxLogMessage(_("*** Application started ***")); + @endcode + + the log output could be something like: + + @verbatim + [7872] d:\testApp\src\testApp.cpp(85) : *** Application started *** + @endverbatim @library{wxbase} @category{logging} - @see wxLogTextCtrl + @see @ref overview_log + + @since 2.9.4 */ -class wxLogWindow : public wxLogInterposer +class wxLogFormatter { public: /** - Creates the log frame window and starts collecting the messages in it. - - @param pParent - The parent window for the log frame, may be @NULL - @param szTitle - The title for the log frame - @param show - @true to show the frame initially (default), otherwise - Show() must be called later. - @param passToOld - @true to process the log messages normally in addition to logging them - in the log frame (default), @false to only log them in the log frame. - Note that if no targets were set using wxLog::SetActiveTarget() then - wxLogWindow simply becomes the active one and messages won't be passed - to other targets. + The default ctor does nothing. */ - wxLogWindow(wxWindow* pParent, const wxString& szTitle, bool show = true, - bool passToOld = true); + wxLogFormatter(); - /** - Returns the associated log frame window. This may be used to position or resize - it but use Show() to show or hide it. - */ - wxFrame* GetFrame() const; /** - Called if the user closes the window interactively, will not be - called if it is destroyed for another reason (such as when program - exits). + This function creates the full log message string. - Return @true from here to allow the frame to close, @false to - prevent this from happening. + Override it to customize the output string format. - @see OnFrameDelete() - */ - virtual bool OnFrameClose(wxFrame* frame); + @param level + The level of this log record, e.g. ::wxLOG_Error. + @param msg + The log message itself. + @param info + All the other information (such as time, component, location...) + associated with this log record. - /** - Called immediately after the log frame creation allowing for - any extra initializations. - */ - virtual void OnFrameCreate(wxFrame* frame); + @return + The formated message. - /** - Called right before the log frame is going to be deleted: will - always be called unlike OnFrameClose(). + @note + Time stamping 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, override + FormatTime(). */ - virtual void OnFrameDelete(wxFrame* frame); + virtual wxString Format(wxLogLevel level, + const wxString& msg, + const wxLogRecordInfo& info) const; +protected: /** - Shows or hides the frame. - */ - void Show(bool show = true); -}; - - - -/** - @class wxLogInterposerTemp + This function formats the time stamp part of the log message. - A special version of wxLogChain which uses itself as the new log target. - It forwards log messages to the previously installed one in addition to - processing them itself. Unlike wxLogInterposer, it doesn't delete the old - target which means it can be used to temporarily redirect log output. + Override this function if you need to customize just the time stamp. - As per wxLogInterposer, this class must be derived from to implement - wxLog::DoLog and/or wxLog::DoLogString methods. + @param time + Time to format. - @library{wxbase} - @category{logging} -*/ -class wxLogInterposerTemp : public wxLogChain -{ -public: - /** - The default constructor installs this object as the current active log target. + @return + The formated time string, may be empty. */ - wxLogInterposerTemp(); + virtual wxString FormatTime(time_t time) const; }; - /** - @class wxLogChain - - This simple class allows you 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 - wxLog::SetActiveTarget does. - - It is especially useful when you want to divert the logs somewhere (for - example to a file or a log window) but also keep showing the error messages - using the standard dialogs as wxLogGui does by default. + @class wxLog - Example of usage: + wxLog class defines the interface for the log targets used by wxWidgets + logging functions as explained in the @ref overview_log. - @code - wxLogChain *logChain = new wxLogChain(new wxLogStderr); + The only situations when you need to directly use this class is when you want + to derive your own log target because the existing ones don't satisfy your + needs. - // all the log messages are sent to stderr and also processed as usually - ... + Otherwise, it is completely hidden behind the @ref group_funcmacro_log "wxLogXXX() functions" + and you may not even know about its existence. - // don't delete logChain directly as this would leave a dangling - // pointer as active log target, use SetActiveTarget() instead - delete wxLog::SetActiveTarget(...something else or NULL...); - @endcode + @note For console-mode applications, the default target is wxLogStderr, so + that all @e wxLogXXX() functions print on @c stderr when @c wxUSE_GUI = 0. @library{wxbase} @category{logging} + + @see @ref overview_log, @ref group_funcmacro_log "wxLogXXX() functions" */ -class wxLogChain : public wxLog +class wxLog { public: /** - Sets the specified @c logger (which may be @NULL) as the default log - target but the log messages are also passed to the previous log target if any. + @name Trace mask functions */ - wxLogChain(wxLog* logger); + //@{ /** - Destroys the previous log target. - */ - virtual ~wxLogChain(); + Add the @a mask to the list of allowed masks for wxLogTrace(). - /** - Detaches the old log target so it won't be destroyed when the wxLogChain object - is destroyed. + @see RemoveTraceMask(), GetTraceMasks() */ - void DetachOldLog(); + static void AddTraceMask(const wxString& mask); /** - Returns the pointer to the previously active log target (which may be @NULL). + Removes all trace masks previously set with AddTraceMask(). + + @see RemoveTraceMask() */ - wxLog* GetOldLog() const; + static void ClearTraceMasks(); /** - Returns @true if the messages are passed to the previously active log - target (default) or @false if PassMessages() had been called. + Returns the currently allowed list of string trace masks. + + @see AddTraceMask(). */ - bool IsPassingMessages() const; + static const wxArrayString& GetTraceMasks(); /** - By default, the log messages are passed to the previously active log target. - Calling this function with @false parameter disables this behaviour - (presumably temporarily, as you shouldn't use wxLogChain at all otherwise) and - it can be reenabled by calling it again with @a passMessages set to @true. + Returns @true if the @a mask is one of allowed masks for wxLogTrace(). + + See also: AddTraceMask(), RemoveTraceMask() */ - void PassMessages(bool passMessages); + static bool IsAllowedTraceMask(const wxString& mask); /** - Sets another log target to use (may be @NULL). + Remove the @a mask from the list of allowed masks for + wxLogTrace(). - The log target specified in the wxLogChain(wxLog*) constructor or in a - previous call to this function is deleted. - This doesn't change the old log target value (the one the messages are - forwarded to) which still remains the same as was active when wxLogChain - object was created. + @see AddTraceMask() */ - void SetLog(wxLog* logger); -}; + static void RemoveTraceMask(const wxString& mask); + //@} -/** - @class wxLogGui - This is the default log target for the GUI wxWidgets applications. + /** + @name Log target functions + */ + //@{ - Please see @ref overview_log_customize for explanation of how to change the - default log target. + /** + Instructs wxLog to not create new log targets on the fly if there is none + currently (see GetActiveTarget()). - An object of this class is used by default to show the log messages created - by using wxLogMessage(), wxLogError() and other logging functions. It - doesn't display the messages logged by them immediately however but - accumulates all messages logged during an event handler execution and then - shows them all at once when its Flush() method is called during the idle - time processing. This has the important advantage of showing only a single - dialog to the user even if several messages were logged because of a single - error as it often happens (e.g. a low level function could log a message - because it failed to open a file resulting in its caller logging another - message due to the failure of higher level operation requiring the use of - this file). If you need to force the display of all previously logged - messages immediately you can use wxLog::FlushActive() to force the dialog - display. + (Almost) for internal use only: it is supposed to be called by the + application shutdown code (where you don't want the log target to be + automatically created anymore). - Also notice that if an error message is logged when several informative - messages had been already logged before, the informative messages are - discarded on the assumption that they are not useful -- and may be - confusing and hence harmful -- any more after the error. The warning - and error messages are never discarded however and any informational - messages logged after the first error one are also kept (as they may - contain information about the error recovery). You may override DoLog() - method to change this behaviour. + Note that this function also calls ClearTraceMasks(). + */ + static void DontCreateOnDemand(); - At any rate, it is possible that that several messages were accumulated - before this class Flush() method is called. If this is the case, Flush() - uses a custom dialog which shows the last message directly and allows the - user to view the previously logged ones by expanding the "Details" - wxCollapsiblePane inside it. This custom dialog also provides the buttons - for copying the log messages to the clipboard and saving them to a file. + /** + Returns the pointer to the active log target (may be @NULL). - However if only a single message is present when Flush() is called, just a - wxMessageBox() is used to show it. This has the advantage of being closer - to the native behaviour but it doesn't give the user any possibility to - copy or save the message (except for the recent Windows versions where @c - Ctrl-C may be pressed in the message box to copy its contents to the - clipboard) so you may want to override DoShowSingleMessage() to customize - wxLogGui -- the dialogs sample shows how to do this. + Notice that if SetActiveTarget() hadn't been previously explicitly + called, this function will by default try to create a log target by + calling wxAppTraits::CreateLogTarget() which may be overridden in a + user-defined traits class to change the default behaviour. You may also + call DontCreateOnDemand() to disable this behaviour. - @library{wxcore} - @category{logging} -*/ -class wxLogGui : public wxLog -{ -public: - /** - Default constructor. + When this function is called from threads other than main one, + auto-creation doesn't happen. But if the thread has a thread-specific + log target previously set by SetThreadActiveTarget(), it is returned + instead of the global one. Otherwise, the global log target is + returned. */ - wxLogGui(); + static wxLog* GetActiveTarget(); /** - Presents the accumulated log messages, if any, to the user. + Sets the specified log target as the active one. - This method is called during the idle time and should show any messages - accumulated in wxLogGui#m_aMessages field to the user. - */ - virtual void Flush(); + Returns the pointer to the previous active log target (may be @NULL). + To suppress logging use a new instance of wxLogNull not @NULL. If the + active log target is set to @NULL a new default log target will be + created when logging occurs. + + @see SetThreadActiveTarget() + */ + static wxLog* SetActiveTarget(wxLog* logtarget); -protected: /** - Returns the appropriate title for the dialog. + Sets a thread-specific log target. - The title is constructed from wxApp::GetAppDisplayName() and the - severity string (e.g. "error" or "warning") appropriate for the current - wxLogGui#m_bErrors and wxLogGui#m_bWarnings values. - */ - wxString GetTitle() const; + The log target passed to this function will be used for all messages + logged by the current thread using the usual wxLog functions. This + shouldn't be called from the main thread which never uses a thread- + specific log target but can be used for the other threads to handle + thread logging completely separately; instead of buffering thread log + messages in the main thread logger. - /** - Returns wxICON_ERROR, wxICON_WARNING or wxICON_INFORMATION depending on - the current maximal severity. + Notice that unlike for SetActiveTarget(), wxWidgets does not destroy + the thread-specific log targets when the thread terminates so doing + this is your responsibility. - This value is suitable to be used in the style parameter of - wxMessageBox() function. + This method is only available if @c wxUSE_THREADS is 1, i.e. wxWidgets + was compiled with threads support. + + @param logger + The new thread-specific log target, possibly @NULL. + @return + The previous thread-specific log target, initially @NULL. + + @since 2.9.1 */ - int GetSeverityIcon() const; + static wxLog *SetThreadActiveTarget(wxLog *logger); /** - Forgets all the currently stored messages. + Flushes the current log target if any, does nothing if there is none. - If you override Flush() (and don't call the base class version), you - must call this method to avoid messages being logged over and over - again. - */ - void Clear(); + When this method is called from the main thread context, it also + flushes any previously buffered messages logged by the other threads. + When it is called from the other threads it simply calls Flush() on the + currently active log target, so it mostly makes sense to do this if a + thread has its own logger set with SetThreadActiveTarget(). + */ + static void FlushActive(); + /** + Resumes logging previously suspended by a call to Suspend(). + All messages logged in the meanwhile will be flushed soon. + */ + static void Resume(); /** - Method called by Flush() to show a single log message. + Suspends the logging until Resume() is called. - This function can be overridden to show the message in a different way. - By default a simple wxMessageBox() call is used. + Note that the latter must be called the same number of times as the former + to undo it, i.e. if you call Suspend() twice you must call Resume() twice as well. - @param message - The message to show (it can contain multiple lines). - @param title - The suggested title for the dialog showing the message, see - GetTitle(). - @param style - One of @c wxICON_XXX constants, see GetSeverityIcon(). - */ - virtual void DoShowSingleLogMessage(const wxString& message, - const wxString& title, - int style); + Note that suspending the logging means that the log sink won't be flushed + periodically, it doesn't have any effect if the current log target does the + logging immediately without waiting for Flush() to be called (the standard + GUI log target only shows the log dialog when it is flushed, so Suspend() + works as expected with it). - /** - Method called by Flush() to show multiple log messages. + @see Resume(), wxLogNull + */ + static void Suspend(); - This function can be overridden to show the messages in a different way. - By default a special log dialog showing the most recent message and - allowing the user to expand it to view the previously logged ones is - used. + //@} - @param messages - Array of messages to show; it contains more than one element. - @param severities - Array of message severities containing @c wxLOG_XXX values. - @param times - Array of time_t values indicating when each message was logged. - @param title - The suggested title for the dialog showing the message, see - GetTitle(). - @param style - One of @c wxICON_XXX constants, see GetSeverityIcon(). - */ - virtual void DoShowMultipleLogMessages(const wxArrayString& messages, - const wxArrayInt& severities, - const wxArrayLong& times, - const wxString& title, - int style); /** - All currently accumulated messages. + @name Log level functions + */ + //@{ - This array may be empty if no messages were logged. + /** + Returns the current log level limit. - @see m_aSeverity, m_aTimes - */ - wxArrayString m_aMessages; + All messages at levels strictly greater than the value returned by this + function are not logged at all. + + @see SetLogLevel(), IsLevelEnabled() + */ + static wxLogLevel GetLogLevel(); /** - The severities of each logged message. + Returns true if logging at this level is enabled for the current thread. - This array is synchronized with wxLogGui#m_aMessages, i.e. the n-th - element of this array corresponds to the severity of the n-th message. - The possible severity values are @c wxLOG_XXX constants, e.g. - wxLOG_Error, wxLOG_Warning, wxLOG_Message etc. - */ - wxArrayInt m_aSeverity; + This function only returns @true if logging is globally enabled and if + @a level is less than or equal to the maximal log level enabled for the + given @a component. - /** - The time stamps of each logged message. + @see IsEnabled(), SetLogLevel(), GetLogLevel(), SetComponentLevel() - The elements of this array are time_t values corresponding to the time - when the message was logged. + @since 2.9.1 */ - wxArrayLong m_aTimes; + static bool IsLevelEnabled(wxLogLevel level, wxString component); /** - True if there any error messages. - */ - bool m_bErrors; + Sets the log level for the given component. - /** - True if there any warning messages. + For example, to disable all but error messages from wxWidgets network + classes you may use + @code + wxLog::SetComponentLevel("wx/net", wxLOG_Error); + @endcode - If both wxLogGui#m_bErrors and this member are false, there are only - informational messages to be shown. - */ - bool m_bWarnings; + SetLogLevel() may be used to set the global log level. - /** - True if there any messages to be shown to the user. + @param component + Non-empty component name, possibly using slashes (@c /) to separate + it into several parts. + @param level + Maximal level of log messages from this component which will be + handled instead of being simply discarded. - This variable is used instead of simply checking whether - wxLogGui#m_aMessages array is empty to allow blocking further calls to - Flush() while a log dialog is already being shown, even if the messages - array hasn't been emptied yet. + @since 2.9.1 */ - bool m_bHasMessages; -}; - + static void SetComponentLevel(const wxString& component, wxLogLevel level); + /** + Specifies that log messages with level greater (numerically) than + @a logLevel should be ignored and not sent to the active log target. -/** - @class wxLogStream + @see SetComponentLevel() + */ + static void SetLogLevel(wxLogLevel logLevel); - This class can be used to redirect the log messages to a C++ stream. + //@} - Please note that this class is only available if wxWidgets was compiled with - the standard iostream library support (@c wxUSE_STD_IOSTREAM must be on). - @library{wxbase} - @category{logging} - @see wxLogStderr, wxStreamToTextRedirector -*/ -class wxLogStream : public wxLog -{ -public: /** - Constructs a log target which sends all the log messages to the given - output stream. If it is @NULL, the messages are sent to @c cerr. + @name Enable/disable features functions */ - wxLogStream(std::ostream *ostr = NULL); -}; + //@{ + /** + Globally enable or disable logging. + Calling this function with @false argument disables all log messages + for the current thread. -/** - @class wxLogStderr + @see wxLogNull, IsEnabled() - This class can be used to redirect the log messages to a C file stream (not to - be confused with C++ streams). + @return + The old state, i.e. @true if logging was previously enabled and + @false if it was disabled. + */ + static bool EnableLogging(bool enable = true); - It is the default log target for the non-GUI wxWidgets applications which - send all the output to @c stderr. + /** + Returns true if logging is enabled at all now. - @library{wxbase} - @category{logging} + @see IsLevelEnabled(), EnableLogging() + */ + static bool IsEnabled(); - @see wxLogStream -*/ -class wxLogStderr : public wxLog -{ -public: /** - Constructs a log target which sends all the log messages to the given - @c FILE. If it is @NULL, the messages are sent to @c stderr. + Returns whether the repetition counting mode is enabled. */ - wxLogStderr(FILE* fp = NULL); -}; + static bool GetRepetitionCounting(); + /** + Enables logging mode in which a log message is logged once, and in case exactly + the same message successively repeats one or more times, only the number of + repetitions is logged. + */ + static void SetRepetitionCounting(bool repetCounting = true); + /** + Returns the current timestamp format string. -/** - @class wxLogBuffer + Notice that the current time stamp is only used by the default log + formatter and custom formatters may ignore this format. + */ + static const wxString& GetTimestamp(); - wxLogBuffer is a very simple implementation of log sink which simply collects - all the logged messages in a string (except the debug messages which are output - in the usual way immediately as we're presumably not interested in collecting - them for later). The messages from different log function calls are separated - by the new lines. + /** + Sets the timestamp format prepended by the default log targets to all + messages. The string may contain any normal characters as well as % + prefixed format specifiers, see @e strftime() manual for details. + Passing an empty string to this function disables message time stamping. - All the messages collected so far can be shown to the user (and the current - buffer cleared) by calling the overloaded wxLogBuffer::Flush method. + Notice that the current time stamp is only used by the default log + formatter and custom formatters may ignore this format. You can also + define a custom wxLogFormatter to customize the time stamp handling + beyond changing its format. + */ + static void SetTimestamp(const wxString& format); - @library{wxbase} - @category{logging} -*/ -class wxLogBuffer : public wxLog -{ -public: /** - The default ctor does nothing. + Disables time stamping of the log messages. + + Notice that the current time stamp is only used by the default log + formatter and custom formatters may ignore calls to this function. + + @since 2.9.0 */ - wxLogBuffer(); + static void DisableTimestamp(); /** - Shows all the messages collected so far to the user (using a message box in the - GUI applications or by printing them out to the console in text mode) and - clears the internal buffer. + Returns whether the verbose mode is currently active. */ - virtual void Flush(); + static bool GetVerbose(); /** - Returns the current buffer contains. Messages from different log function calls - are separated with the new lines in the buffer. - The buffer can be cleared by Flush() which will also show the current - contents to the user. + Activates or deactivates verbose mode in which the verbose messages are + logged as the normal ones instead of being silently dropped. + + The verbose messages are the trace messages which are not disabled in the + release mode and are generated by wxLogVerbose(). + + @see @ref overview_log */ - const wxString& GetBuffer() const; -}; + static void SetVerbose(bool verbose = true); + //@} -/** - @class wxLogInterposer + /** + Sets the specified formatter as the active one. - A special version of wxLogChain which uses itself as the new log target. - It forwards log messages to the previously installed one in addition to - processing them itself. + @param formatter + The new formatter. If @NULL, reset to the default formatter. - Unlike wxLogChain which is usually used directly as is, this class must be - derived from to implement wxLog::DoLog and/or wxLog::DoLogString methods. + Returns the pointer to the previous formatter. You must delete it + if you don't plan to attach it again to a wxLog object later. + + @since 2.9.4 + */ + wxLogFormatter *SetFormatter(wxLogFormatter* formatter); - wxLogInterposer destroys the previous log target in its destructor. - If you don't want this to happen, use wxLogInterposerTemp instead. - @library{wxbase} - @category{logging} -*/ -class wxLogInterposer : public wxLogChain -{ -public: /** - The default constructor installs this object as the current active log target. + Some of wxLog implementations, most notably the standard wxLogGui class, + buffer the messages (for example, to avoid showing the user a zillion of modal + message boxes one after another -- which would be really annoying). + This function shows them all and clears the buffer contents. + If the buffer is already empty, nothing happens. + + If you override this method in a derived class, call the base class + version first, before doing anything else. */ - wxLogInterposer(); -}; + virtual void Flush(); + /** + Log the given record. + This function should only be called from the DoLog() implementations in + the derived classes if they need to call DoLogRecord() on another log + object (they can, of course, just use wxLog::DoLogRecord() call syntax + to call it on the object itself). It should not be used for logging new + messages which can be only sent to the currently active logger using + OnLog() which also checks if the logging (for this level) is enabled + while this method just directly calls DoLog(). -/** - @class wxLogTextCtrl + Example of use of this class from wxLogChain: + @code + void wxLogChain::DoLogRecord(wxLogLevel level, + const wxString& msg, + const wxLogRecordInfo& info) + { + // let the previous logger show it + if ( m_logOld && IsPassingMessages() ) + m_logOld->LogRecord(level, msg, info); - Using these target all the log messages can be redirected to a text control. - The text control must have been created with @c wxTE_MULTILINE style by the - caller previously. + // and also send it to the new one + if ( m_logNew && m_logNew != this ) + m_logNew->LogRecord(level, msg, info); + } + @endcode - @library{wxbase} - @category{logging} + @since 2.9.1 + */ + void LogRecord(wxLogLevel level, const wxString& msg, const wxLogRecordInfo& info); - @see wxTextCtrl, wxStreamToTextRedirector -*/ -class wxLogTextCtrl : public wxLog -{ -public: +protected: /** - Constructs a log target which sends all the log messages to the given text - control. The @a textctrl parameter cannot be @NULL. - */ - wxLogTextCtrl(wxTextCtrl* pTextCtrl); -}; + @name Logging callbacks. + The functions which should be overridden by custom log targets. + When defining a new log target, you have a choice between overriding + DoLogRecord(), which provides maximal flexibility, DoLogTextAtLevel() + which can be used if you don't intend to change the default log + messages formatting but want to handle log messages of different levels + differently or, in the simplest case, DoLogText(). + */ + //@{ + /** + Called to log a new record. -/** - @class wxLogFormatter + Any log message created by wxLogXXX() functions is passed to this + method of the active log target. The default implementation prepends + the timestamp and, for some log levels (e.g. error and warning), the + corresponding prefix to @a msg and passes it to DoLogTextAtLevel(). - wxLogFormatter class is used to format the log messages. It implements the - default formatting and can be derived from to create custom formatters. + You may override this method to implement custom formatting of the + log messages or to implement custom filtering of log messages (e.g. you + could discard all log messages coming from the given source file). + */ + virtual void DoLogRecord(wxLogLevel level, + const wxString& msg, + const wxLogRecordInfo& info); - The default implementation formats the message into a string containing - the time stamp, level-dependent prefix and the message itself. + /** + Called to log the specified string at given level. - To change it, you can derive from it and override its Format() method. For - example, to include the thread id in the log messages you can use - @code - class LogFormatterWithThread : public wxLogFormatter - { - virtual wxString Format(wxLogLevel level, - const wxString& msg, - const wxLogRecordInfo& info) const - { - return wxString::Format("[%d] %s(%d) : %s", - info.threadId, info.filename, info.line, msg); - } - }; - @endcode - And then associate it with wxLog instance using its SetFormatter(). Then, - if you call: + The base class versions logs debug and trace messages on the system + default debug output channel and passes all the other messages to + DoLogText(). + */ + virtual void DoLogTextAtLevel(wxLogLevel level, const wxString& msg); - @code - wxLogMessage(_("*** Application started ***")); - @endcode + /** + Called to log the specified string. - the log output could be something like: + A simple implementation might just send the string to @c stdout or + @c stderr or save it in a file (of course, the already existing + wxLogStderr can be used for this). - @verbatim - [7872] d:\testApp\src\testApp.cpp(85) : *** Application started *** - @endverbatim + The base class version of this function asserts so it must be + overridden if you don't override DoLogRecord() or DoLogTextAtLevel(). + */ + virtual void DoLogText(const wxString& msg); - @library{wxbase} - @category{logging} + //@} +}; - @see @ref overview_log - @since 2.9.4 -*/ -class wxLogFormatter -{ -public: - /** - The default ctor does nothing. - */ - wxLogFormatter(); +/** + @class wxLogChain - /** - This function creates the full log message string. + This simple class allows you 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 + wxLog::SetActiveTarget does. - Override it to customize the output string format. + It is especially useful when you want to divert the logs somewhere (for + example to a file or a log window) but also keep showing the error messages + using the standard dialogs as wxLogGui does by default. - @param level - The level of this log record, e.g. ::wxLOG_Error. - @param msg - The log message itself. - @param info - All the other information (such as time, component, location...) - associated with this log record. + Example of usage: - @return - The formated message. + @code + wxLogChain *logChain = new wxLogChain(new wxLogStderr); - @note - Time stamping 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, override - FormatTime(). + // all the log messages are sent to stderr and also processed as usually + ... + + // don't delete logChain directly as this would leave a dangling + // pointer as active log target, use SetActiveTarget() instead + delete wxLog::SetActiveTarget(...something else or NULL...); + @endcode + + @library{wxbase} + @category{logging} +*/ +class wxLogChain : public wxLog +{ +public: + /** + Sets the specified @c logger (which may be @NULL) as the default log + target but the log messages are also passed to the previous log target if any. */ - virtual wxString Format(wxLogLevel level, - const wxString& msg, - const wxLogRecordInfo& info) const; + wxLogChain(wxLog* logger); -protected: /** - This function formats the time stamp part of the log message. + Destroys the previous log target. + */ + virtual ~wxLogChain(); - Override this function if you need to customize just the time stamp. + /** + Detaches the old log target so it won't be destroyed when the wxLogChain object + is destroyed. + */ + void DetachOldLog(); - @param time - Time to format. + /** + Returns the pointer to the previously active log target (which may be @NULL). + */ + wxLog* GetOldLog() const; - @return - The formated time string, may be empty. + /** + Returns @true if the messages are passed to the previously active log + target (default) or @false if PassMessages() had been called. */ - virtual wxString FormatTime(time_t time) const; + bool IsPassingMessages() const; + + /** + By default, the log messages are passed to the previously active log target. + Calling this function with @false parameter disables this behaviour + (presumably temporarily, as you shouldn't use wxLogChain at all otherwise) and + it can be reenabled by calling it again with @a passMessages set to @true. + */ + void PassMessages(bool passMessages); + + /** + Sets another log target to use (may be @NULL). + + The log target specified in the wxLogChain(wxLog*) constructor or in a + previous call to this function is deleted. + This doesn't change the old log target value (the one the messages are + forwarded to) which still remains the same as was active when wxLogChain + object was created. + */ + void SetLog(wxLog* logger); }; + /** - @class wxLog + @class wxLogInterposer - wxLog class defines the interface for the log targets used by wxWidgets - logging functions as explained in the @ref overview_log. - - The only situations when you need to directly use this class is when you want - to derive your own log target because the existing ones don't satisfy your - needs. + A special version of wxLogChain which uses itself as the new log target. + It forwards log messages to the previously installed one in addition to + processing them itself. - Otherwise, it is completely hidden behind the @ref group_funcmacro_log "wxLogXXX() functions" - and you may not even know about its existence. + Unlike wxLogChain which is usually used directly as is, this class must be + derived from to implement wxLog::DoLog and/or wxLog::DoLogString methods. - @note For console-mode applications, the default target is wxLogStderr, so - that all @e wxLogXXX() functions print on @c stderr when @c wxUSE_GUI = 0. + wxLogInterposer destroys the previous log target in its destructor. + If you don't want this to happen, use wxLogInterposerTemp instead. @library{wxbase} @category{logging} - - @see @ref overview_log, @ref group_funcmacro_log "wxLogXXX() functions" */ -class wxLog +class wxLogInterposer : public wxLogChain { public: /** - @name Trace mask functions + The default constructor installs this object as the current active log target. */ - //@{ - - /** - Add the @a mask to the list of allowed masks for wxLogTrace(). + wxLogInterposer(); +}; - @see RemoveTraceMask(), GetTraceMasks() - */ - static void AddTraceMask(const wxString& mask); - /** - Removes all trace masks previously set with AddTraceMask(). - @see RemoveTraceMask() - */ - static void ClearTraceMasks(); +/** + @class wxLogInterposerTemp - /** - Returns the currently allowed list of string trace masks. + A special version of wxLogChain which uses itself as the new log target. + It forwards log messages to the previously installed one in addition to + processing them itself. Unlike wxLogInterposer, it doesn't delete the old + target which means it can be used to temporarily redirect log output. - @see AddTraceMask(). - */ - static const wxArrayString& GetTraceMasks(); + As per wxLogInterposer, this class must be derived from to implement + wxLog::DoLog and/or wxLog::DoLogString methods. + @library{wxbase} + @category{logging} +*/ +class wxLogInterposerTemp : public wxLogChain +{ +public: /** - Returns @true if the @a mask is one of allowed masks for wxLogTrace(). - - See also: AddTraceMask(), RemoveTraceMask() + The default constructor installs this object as the current active log target. */ - static bool IsAllowedTraceMask(const wxString& mask); + wxLogInterposerTemp(); +}; - /** - Remove the @a mask from the list of allowed masks for - wxLogTrace(). - @see AddTraceMask() - */ - static void RemoveTraceMask(const wxString& mask); - - //@} +/** + @class wxLogStream + This class can be used to redirect the log messages to a C++ stream. + Please note that this class is only available if wxWidgets was compiled with + the standard iostream library support (@c wxUSE_STD_IOSTREAM must be on). - /** - @name Log target functions - */ - //@{ - - /** - Instructs wxLog to not create new log targets on the fly if there is none - currently (see GetActiveTarget()). - - (Almost) for internal use only: it is supposed to be called by the - application shutdown code (where you don't want the log target to be - automatically created anymore). + @library{wxbase} + @category{logging} - Note that this function also calls ClearTraceMasks(). + @see wxLogStderr, wxStreamToTextRedirector +*/ +class wxLogStream : public wxLog +{ +public: + /** + Constructs a log target which sends all the log messages to the given + output stream. If it is @NULL, the messages are sent to @c cerr. */ - static void DontCreateOnDemand(); + wxLogStream(std::ostream *ostr = NULL); +}; - /** - Returns the pointer to the active log target (may be @NULL). - Notice that if SetActiveTarget() hadn't been previously explicitly - called, this function will by default try to create a log target by - calling wxAppTraits::CreateLogTarget() which may be overridden in a - user-defined traits class to change the default behaviour. You may also - call DontCreateOnDemand() to disable this behaviour. - When this function is called from threads other than main one, - auto-creation doesn't happen. But if the thread has a thread-specific - log target previously set by SetThreadActiveTarget(), it is returned - instead of the global one. Otherwise, the global log target is - returned. - */ - static wxLog* GetActiveTarget(); +/** + @class wxLogStderr - /** - Sets the specified log target as the active one. + This class can be used to redirect the log messages to a C file stream (not to + be confused with C++ streams). - Returns the pointer to the previous active log target (may be @NULL). - To suppress logging use a new instance of wxLogNull not @NULL. If the - active log target is set to @NULL a new default log target will be - created when logging occurs. + It is the default log target for the non-GUI wxWidgets applications which + send all the output to @c stderr. - @see SetThreadActiveTarget() - */ - static wxLog* SetActiveTarget(wxLog* logtarget); + @library{wxbase} + @category{logging} + @see wxLogStream +*/ +class wxLogStderr : public wxLog +{ +public: /** - Sets a thread-specific log target. + Constructs a log target which sends all the log messages to the given + @c FILE. If it is @NULL, the messages are sent to @c stderr. + */ + wxLogStderr(FILE* fp = NULL); +}; - The log target passed to this function will be used for all messages - logged by the current thread using the usual wxLog functions. This - shouldn't be called from the main thread which never uses a thread- - specific log target but can be used for the other threads to handle - thread logging completely separately; instead of buffering thread log - messages in the main thread logger. - Notice that unlike for SetActiveTarget(), wxWidgets does not destroy - the thread-specific log targets when the thread terminates so doing - this is your responsibility. - This method is only available if @c wxUSE_THREADS is 1, i.e. wxWidgets - was compiled with threads support. +/** + @class wxLogBuffer - @param logger - The new thread-specific log target, possibly @NULL. - @return - The previous thread-specific log target, initially @NULL. + wxLogBuffer is a very simple implementation of log sink which simply collects + all the logged messages in a string (except the debug messages which are output + in the usual way immediately as we're presumably not interested in collecting + them for later). The messages from different log function calls are separated + by the new lines. - @since 2.9.1 - */ - static wxLog *SetThreadActiveTarget(wxLog *logger); - - /** - Flushes the current log target if any, does nothing if there is none. + All the messages collected so far can be shown to the user (and the current + buffer cleared) by calling the overloaded wxLogBuffer::Flush method. - When this method is called from the main thread context, it also - flushes any previously buffered messages logged by the other threads. - When it is called from the other threads it simply calls Flush() on the - currently active log target, so it mostly makes sense to do this if a - thread has its own logger set with SetThreadActiveTarget(). - */ - static void FlushActive(); - + @library{wxbase} + @category{logging} +*/ +class wxLogBuffer : public wxLog +{ +public: /** - Resumes logging previously suspended by a call to Suspend(). - All messages logged in the meanwhile will be flushed soon. + The default ctor does nothing. */ - static void Resume(); + wxLogBuffer(); /** - Suspends the logging until Resume() is called. - - Note that the latter must be called the same number of times as the former - to undo it, i.e. if you call Suspend() twice you must call Resume() twice as well. - - Note that suspending the logging means that the log sink won't be flushed - periodically, it doesn't have any effect if the current log target does the - logging immediately without waiting for Flush() to be called (the standard - GUI log target only shows the log dialog when it is flushed, so Suspend() - works as expected with it). - - @see Resume(), wxLogNull + Shows all the messages collected so far to the user (using a message box in the + GUI applications or by printing them out to the console in text mode) and + clears the internal buffer. */ - static void Suspend(); - - //@} - - + virtual void Flush(); /** - @name Log level functions + Returns the current buffer contains. Messages from different log function calls + are separated with the new lines in the buffer. + The buffer can be cleared by Flush() which will also show the current + contents to the user. */ - //@{ - - /** - Returns the current log level limit. - - All messages at levels strictly greater than the value returned by this - function are not logged at all. + const wxString& GetBuffer() const; +}; - @see SetLogLevel(), IsLevelEnabled() - */ - static wxLogLevel GetLogLevel(); - - /** - Returns true if logging at this level is enabled for the current thread. - This function only returns @true if logging is globally enabled and if - @a level is less than or equal to the maximal log level enabled for the - given @a component. - @see IsEnabled(), SetLogLevel(), GetLogLevel(), SetComponentLevel() +/** + @class wxLogNull - @since 2.9.1 - */ - static bool IsLevelEnabled(wxLogLevel level, wxString component); + This class allows you to temporarily suspend logging. All calls to the log + functions during the life time of an object of this class are just ignored. - /** - Sets the log level for the given component. + In particular, it can be used to suppress the log messages given by wxWidgets + itself but it should be noted that it is rarely the best way to cope with this + problem as @b all log messages are suppressed, even if they indicate a + completely different error than the one the programmer wanted to suppress. - For example, to disable all but error messages from wxWidgets network - classes you may use - @code - wxLog::SetComponentLevel("wx/net", wxLOG_Error); - @endcode + For instance, the example of the overview: - SetLogLevel() may be used to set the global log level. + @code + wxFile file; - @param component - Non-empty component name, possibly using slashes (@c /) to separate - it into several parts. - @param level - Maximal level of log messages from this component which will be - handled instead of being simply discarded. + // wxFile.Open() normally complains if file can't be opened, we don't want it + { + wxLogNull logNo; + if ( !file.Open("bar") ) + ... process error ourselves ... + } // ~wxLogNull called, old log sink restored - @since 2.9.1 - */ - static void SetComponentLevel(const wxString& component, wxLogLevel level); + wxLogMessage("..."); // ok + @endcode - /** - Specifies that log messages with level greater (numerically) than - @a logLevel should be ignored and not sent to the active log target. + would be better written as: - @see SetComponentLevel() - */ - static void SetLogLevel(wxLogLevel logLevel); - - //@} + @code + wxFile file; + // don't try to open file if it doesn't exist, we are prepared to deal with + // this ourselves - but all other errors are not expected + if ( wxFile::Exists("bar") ) + { + // gives an error message if the file couldn't be opened + file.Open("bar"); + } + else + { + ... + } + @endcode + @library{wxbase} + @category{logging} +*/ +class wxLogNull +{ +public: /** - @name Enable/disable features functions + Suspends logging. */ - //@{ - + wxLogNull(); + /** - Globally enable or disable logging. + Resumes logging. + */ + ~wxLogNull(); +}; - Calling this function with @false argument disables all log messages - for the current thread. +#endif // wxUSE_BASE - @see wxLogNull, IsEnabled() +#if wxUSE_GUI - @return - The old state, i.e. @true if logging was previously enabled and - @false if it was disabled. - */ - static bool EnableLogging(bool enable = true); +/** + @class wxLogWindow - /** - Returns true if logging is enabled at all now. + This class represents a background log window: to be precise, it collects all + log messages in the log frame which it manages but also passes them on to the + log target which was active at the moment of its creation. This allows you, for + example, to show all the log messages in a frame but still continue to process + them normally by showing the standard log dialog. - @see IsLevelEnabled(), EnableLogging() - */ - static bool IsEnabled(); - - /** - Returns whether the repetition counting mode is enabled. - */ - static bool GetRepetitionCounting(); + @library{wxcore} + @category{logging} + @see wxLogTextCtrl +*/ +class wxLogWindow : public wxLogInterposer +{ +public: /** - Enables logging mode in which a log message is logged once, and in case exactly - the same message successively repeats one or more times, only the number of - repetitions is logged. - */ - static void SetRepetitionCounting(bool repetCounting = true); - - /** - Returns the current timestamp format string. + Creates the log frame window and starts collecting the messages in it. - Notice that the current time stamp is only used by the default log - formatter and custom formatters may ignore this format. + @param pParent + The parent window for the log frame, may be @NULL + @param szTitle + The title for the log frame + @param show + @true to show the frame initially (default), otherwise + Show() must be called later. + @param passToOld + @true to process the log messages normally in addition to logging them + in the log frame (default), @false to only log them in the log frame. + Note that if no targets were set using wxLog::SetActiveTarget() then + wxLogWindow simply becomes the active one and messages won't be passed + to other targets. */ - static const wxString& GetTimestamp(); + wxLogWindow(wxWindow* pParent, const wxString& szTitle, bool show = true, + bool passToOld = true); /** - Sets the timestamp format prepended by the default log targets to all - messages. The string may contain any normal characters as well as % - prefixed format specifiers, see @e strftime() manual for details. - Passing an empty string to this function disables message time stamping. - - Notice that the current time stamp is only used by the default log - formatter and custom formatters may ignore this format. You can also - define a custom wxLogFormatter to customize the time stamp handling - beyond changing its format. + Returns the associated log frame window. This may be used to position or resize + it but use Show() to show or hide it. */ - static void SetTimestamp(const wxString& format); + wxFrame* GetFrame() const; /** - Disables time stamping of the log messages. + Called if the user closes the window interactively, will not be + called if it is destroyed for another reason (such as when program + exits). - Notice that the current time stamp is only used by the default log - formatter and custom formatters may ignore calls to this function. + Return @true from here to allow the frame to close, @false to + prevent this from happening. - @since 2.9.0 + @see OnFrameDelete() */ - static void DisableTimestamp(); - + virtual bool OnFrameClose(wxFrame* frame); + /** - Returns whether the verbose mode is currently active. + Called right before the log frame is going to be deleted: will + always be called unlike OnFrameClose(). */ - static bool GetVerbose(); + virtual void OnFrameDelete(wxFrame* frame); /** - Activates or deactivates verbose mode in which the verbose messages are - logged as the normal ones instead of being silently dropped. - - The verbose messages are the trace messages which are not disabled in the - release mode and are generated by wxLogVerbose(). - - @see @ref overview_log + Shows or hides the frame. */ - static void SetVerbose(bool verbose = true); - - //@} - + void Show(bool show = true); +}; - /** - Sets the specified formatter as the active one. - @param formatter - The new formatter. If @NULL, reset to the default formatter. - Returns the pointer to the previous formatter. You must delete it - if you don't plan to attach it again to a wxLog object later. +/** + @class wxLogGui + + This is the default log target for the GUI wxWidgets applications. + + Please see @ref overview_log_customize for explanation of how to change the + default log target. + + An object of this class is used by default to show the log messages created + by using wxLogMessage(), wxLogError() and other logging functions. It + doesn't display the messages logged by them immediately however but + accumulates all messages logged during an event handler execution and then + shows them all at once when its Flush() method is called during the idle + time processing. This has the important advantage of showing only a single + dialog to the user even if several messages were logged because of a single + error as it often happens (e.g. a low level function could log a message + because it failed to open a file resulting in its caller logging another + message due to the failure of higher level operation requiring the use of + this file). If you need to force the display of all previously logged + messages immediately you can use wxLog::FlushActive() to force the dialog + display. + + Also notice that if an error message is logged when several informative + messages had been already logged before, the informative messages are + discarded on the assumption that they are not useful -- and may be + confusing and hence harmful -- any more after the error. The warning + and error messages are never discarded however and any informational + messages logged after the first error one are also kept (as they may + contain information about the error recovery). You may override DoLog() + method to change this behaviour. + + At any rate, it is possible that that several messages were accumulated + before this class Flush() method is called. If this is the case, Flush() + uses a custom dialog which shows the last message directly and allows the + user to view the previously logged ones by expanding the "Details" + wxCollapsiblePane inside it. This custom dialog also provides the buttons + for copying the log messages to the clipboard and saving them to a file. + + However if only a single message is present when Flush() is called, just a + wxMessageBox() is used to show it. This has the advantage of being closer + to the native behaviour but it doesn't give the user any possibility to + copy or save the message (except for the recent Windows versions where @c + Ctrl-C may be pressed in the message box to copy its contents to the + clipboard) so you may want to override DoShowSingleLogMessage() to + customize wxLogGui -- the dialogs sample shows how to do this. - @since 2.9.4 + @library{wxcore} + @category{logging} +*/ +class wxLogGui : public wxLog +{ +public: + /** + Default constructor. */ - wxLogFormatter *SetFormatter(wxLogFormatter* formatter); - + wxLogGui(); /** - Some of wxLog implementations, most notably the standard wxLogGui class, - buffer the messages (for example, to avoid showing the user a zillion of modal - message boxes one after another -- which would be really annoying). - This function shows them all and clears the buffer contents. - If the buffer is already empty, nothing happens. + Presents the accumulated log messages, if any, to the user. - If you override this method in a derived class, call the base class - version first, before doing anything else. - */ + This method is called during the idle time and should show any messages + accumulated in wxLogGui#m_aMessages field to the user. + */ virtual void Flush(); - - /** - Log the given record. - This function should only be called from the DoLog() implementations in - the derived classes if they need to call DoLogRecord() on another log - object (they can, of course, just use wxLog::DoLogRecord() call syntax - to call it on the object itself). It should not be used for logging new - messages which can be only sent to the currently active logger using - OnLog() which also checks if the logging (for this level) is enabled - while this method just directly calls DoLog(). +protected: + /** + Returns the appropriate title for the dialog. - Example of use of this class from wxLogChain: - @code - void wxLogChain::DoLogRecord(wxLogLevel level, - const wxString& msg, - const wxLogRecordInfo& info) - { - // let the previous logger show it - if ( m_logOld && IsPassingMessages() ) - m_logOld->LogRecord(level, msg, info); + The title is constructed from wxApp::GetAppDisplayName() and the + severity string (e.g. "error" or "warning") appropriate for the current + wxLogGui#m_bErrors and wxLogGui#m_bWarnings values. + */ + wxString GetTitle() const; - // and also send it to the new one - if ( m_logNew && m_logNew != this ) - m_logNew->LogRecord(level, msg, info); - } - @endcode + /** + Returns wxICON_ERROR, wxICON_WARNING or wxICON_INFORMATION depending on + the current maximal severity. - @since 2.9.1 + This value is suitable to be used in the style parameter of + wxMessageBox() function. */ - void LogRecord(wxLogLevel level, const wxString& msg, const wxLogRecordInfo& info); + int GetSeverityIcon() const; -protected: /** - @name Logging callbacks. - - The functions which should be overridden by custom log targets. + Forgets all the currently stored messages. - When defining a new log target, you have a choice between overriding - DoLogRecord(), which provides maximal flexibility, DoLogTextAtLevel() - which can be used if you don't intend to change the default log - messages formatting but want to handle log messages of different levels - differently or, in the simplest case, DoLogText(). + If you override Flush() (and don't call the base class version), you + must call this method to avoid messages being logged over and over + again. */ - //@{ + void Clear(); + /** - Called to log a new record. + All currently accumulated messages. - Any log message created by wxLogXXX() functions is passed to this - method of the active log target. The default implementation prepends - the timestamp and, for some log levels (e.g. error and warning), the - corresponding prefix to @a msg and passes it to DoLogTextAtLevel(). + This array may be empty if no messages were logged. - You may override this method to implement custom formatting of the - log messages or to implement custom filtering of log messages (e.g. you - could discard all log messages coming from the given source file). + @see m_aSeverity, m_aTimes */ - virtual void DoLogRecord(wxLogLevel level, - const wxString& msg, - const wxLogRecordInfo& info); + wxArrayString m_aMessages; /** - Called to log the specified string at given level. + The severities of each logged message. - The base class versions logs debug and trace messages on the system - default debug output channel and passes all the other messages to - DoLogText(). - */ - virtual void DoLogTextAtLevel(wxLogLevel level, const wxString& msg); + This array is synchronized with wxLogGui#m_aMessages, i.e. the n-th + element of this array corresponds to the severity of the n-th message. + The possible severity values are @c wxLOG_XXX constants, e.g. + wxLOG_Error, wxLOG_Warning, wxLOG_Message etc. + */ + wxArrayInt m_aSeverity; /** - Called to log the specified string. + The time stamps of each logged message. - A simple implementation might just send the string to @c stdout or - @c stderr or save it in a file (of course, the already existing - wxLogStderr can be used for this). + The elements of this array are time_t values corresponding to the time + when the message was logged. + */ + wxArrayLong m_aTimes; - The base class version of this function asserts so it must be - overridden if you don't override DoLogRecord() or DoLogTextAtLevel(). - */ - virtual void DoLogText(const wxString& msg); + /** + True if there any error messages. + */ + bool m_bErrors; - //@} -}; + /** + True if there any warning messages. + If both wxLogGui#m_bErrors and this member are false, there are only + informational messages to be shown. + */ + bool m_bWarnings; + /** + True if there any messages to be shown to the user. -/** - @class wxLogNull + This variable is used instead of simply checking whether + wxLogGui#m_aMessages array is empty to allow blocking further calls to + Flush() while a log dialog is already being shown, even if the messages + array hasn't been emptied yet. + */ + bool m_bHasMessages; - This class allows you to temporarily suspend logging. All calls to the log - functions during the life time of an object of this class are just ignored. +private: + /** + Method called by Flush() to show a single log message. - In particular, it can be used to suppress the log messages given by wxWidgets - itself but it should be noted that it is rarely the best way to cope with this - problem as @b all log messages are suppressed, even if they indicate a - completely different error than the one the programmer wanted to suppress. + This function can be overridden to show the message in a different way. + By default a simple wxMessageBox() call is used. - For instance, the example of the overview: + @param message + The message to show (it can contain multiple lines). + @param title + The suggested title for the dialog showing the message, see + GetTitle(). + @param style + One of @c wxICON_XXX constants, see GetSeverityIcon(). + */ + virtual void DoShowSingleLogMessage(const wxString& message, + const wxString& title, + int style); - @code - wxFile file; + /** + Method called by Flush() to show multiple log messages. - // wxFile.Open() normally complains if file can't be opened, we don't want it - { - wxLogNull logNo; - if ( !file.Open("bar") ) - ... process error ourselves ... - } // ~wxLogNull called, old log sink restored + This function can be overridden to show the messages in a different way. + By default a special log dialog showing the most recent message and + allowing the user to expand it to view the previously logged ones is + used. - wxLogMessage("..."); // ok - @endcode + @param messages + Array of messages to show; it contains more than one element. + @param severities + Array of message severities containing @c wxLOG_XXX values. + @param times + Array of time_t values indicating when each message was logged. + @param title + The suggested title for the dialog showing the message, see + GetTitle(). + @param style + One of @c wxICON_XXX constants, see GetSeverityIcon(). + */ + virtual void DoShowMultipleLogMessages(const wxArrayString& messages, + const wxArrayInt& severities, + const wxArrayLong& times, + const wxString& title, + int style); +}; - would be better written as: - @code - wxFile file; - // don't try to open file if it doesn't exist, we are prepared to deal with - // this ourselves - but all other errors are not expected - if ( wxFile::Exists("bar") ) - { - // gives an error message if the file couldn't be opened - file.Open("bar"); - } - else - { - ... - } - @endcode +/** + @class wxLogTextCtrl + Using these target all the log messages can be redirected to a text control. + The text control must have been created with @c wxTE_MULTILINE style by the + caller previously. - @library{wxbase} + @library{wxcore} @category{logging} + + @see wxTextCtrl, wxStreamToTextRedirector */ -class wxLogNull +class wxLogTextCtrl : public wxLog { public: /** - Suspends logging. - */ - wxLogNull(); - - /** - Resumes logging. + Constructs a log target which sends all the log messages to the given text + control. The @a textctrl parameter cannot be @NULL. */ - ~wxLogNull(); + wxLogTextCtrl(wxTextCtrl* pTextCtrl); }; +#endif // wxUSE_GUI + +#if wxUSE_BASE + // ============================================================================ // Global functions/macros @@ -1447,3 +1445,4 @@ void wxVLogSysError(const char* formatString, va_list argPtr); //@} +#endif // wxUSE_BASE