These functions provide a variety of logging functions.
The functions use (implicitly) the currently active log target, so their descriptions here may not apply if the log target is not the standard one (installed by wxWidgets in the beginning of the program).
Related Overviews: Logging Overview
Related class group: Logging
Macros | |
#define | WXTRACE(format, ...) |
#define | WXTRACELEVEL(level, format, ...) |
Functions | |
bool | wxSafeShowMessage (const wxString &title, const wxString &text) |
This function shows a message to the user in a safe way and should be safe to call even before the application has been initialized or if it is currently in some other strange state (for example, about to crash). More... | |
unsigned long | wxSysErrorCode () |
Returns the error code from the last system call. More... | |
wxString | wxSysErrorMsgStr (unsigned long errCode=0) |
Returns the error message corresponding to the given system error code. More... | |
const wxChar * | wxSysErrorMsg (unsigned long errCode=0) |
Returns the error message corresponding to the given system error code. More... | |
void | wxLogGeneric (wxLogLevel level, const char *formatString,...) |
Logs a message with the given wxLogLevel. More... | |
void | wxVLogGeneric (wxLogLevel level, const char *formatString, va_list argPtr) |
void | wxLogMessage (const char *formatString,...) |
For all normal, informational messages. More... | |
void | wxVLogMessage (const char *formatString, va_list argPtr) |
void | wxLogInfo (const char *formatString,...) |
For low priority messages. More... | |
void | wxVLogInfo (const char *formatString, va_list argPtr) |
void | wxLogVerbose (const char *formatString,...) |
For verbose output. More... | |
void | wxVLogVerbose (const char *formatString, va_list argPtr) |
void | wxLogWarning (const char *formatString,...) |
For warnings - they are also normally shown to the user, but don't interrupt the program work. More... | |
void | wxVLogWarning (const char *formatString, va_list argPtr) |
void | wxLogFatalError (const char *formatString,...) |
Like wxLogError(), but also terminates the program with the exit code 3. More... | |
void | wxVLogFatalError (const char *formatString, va_list argPtr) |
void | wxLogError (const char *formatString,...) |
The functions to use for error messages, i.e. More... | |
void | wxVLogError (const char *formatString, va_list argPtr) |
void | wxLogTrace (const char *mask, const char *formatString,...) |
Log a message at wxLOG_Trace log level (see wxLogLevelValues enum). More... | |
void | wxVLogTrace (const char *mask, const char *formatString, va_list argPtr) |
void | wxLogTrace (wxTraceMask mask, const char *formatString,...) |
Like wxLogDebug(), trace functions only do something in debug builds and expand to nothing in the release one. More... | |
void | wxVLogTrace (wxTraceMask mask, const char *formatString, va_list argPtr) |
void | wxLogDebug (const char *formatString,...) |
The right functions for debug output. More... | |
void | wxVLogDebug (const char *formatString, va_list argPtr) |
void | wxLogStatus (wxFrame *frame, const char *formatString,...) |
Messages logged by this function will appear in the statusbar of the frame or of the top level application window by default (i.e. More... | |
void | wxVLogStatus (wxFrame *frame, const char *formatString, va_list argPtr) |
void | wxLogStatus (const char *formatString,...) |
void | wxVLogStatus (const char *formatString, va_list argPtr) |
void | wxLogSysError (const char *formatString,...) |
Mostly used by wxWidgets itself, but might be handy for logging errors after system call (API function) failure. More... | |
void | wxVLogSysError (const char *formatString, va_list argPtr) |
void | wxTrace (const wxString &format,...) |
void | wxTraceLevel (int level, const wxString &format,...) |
#define WXTRACE | ( | format, | |
... | |||
) |
Calls wxTrace() with printf-style variable argument syntax. Output is directed to the current output stream (see wxDebugContext).
Include file:
#include <wx/memory.h>
#define WXTRACELEVEL | ( | level, | |
format, | |||
... | |||
) |
Calls wxTraceLevel with printf-style variable argument syntax. Output is directed to the current output stream (see wxDebugContext). The first argument should be the level at which this information is appropriate. It will only be output if the level returned by wxDebugContext::GetLevel is equal to or greater than this value.
Include file:
#include <wx/memory.h>
void wxLogDebug | ( | const char * | formatString, |
... | |||
) |
The right functions for debug output.
They only do something in debug mode (when the preprocessor symbol __WXDEBUG__
is defined) and expand to nothing in release mode (otherwise).
Include file:
#include <wx/log.h>
void wxLogError | ( | const char * | formatString, |
... | |||
) |
The functions to use for error messages, i.e.
the messages that must be shown to the user. The default processing is to pop up a message box to inform the user about it.
Include file:
#include <wx/log.h>
void wxLogFatalError | ( | const char * | formatString, |
... | |||
) |
Like wxLogError(), but also terminates the program with the exit code 3.
Using abort() standard function also terminates the program with this exit code.
Include file:
#include <wx/log.h>
void wxLogGeneric | ( | wxLogLevel | level, |
const char * | formatString, | ||
... | |||
) |
Logs a message with the given wxLogLevel.
E.g. using wxLOG_Message
as first argument, this function behaves like wxLogMessage().
Include file:
#include <wx/log.h>
void wxLogInfo | ( | const char * | formatString, |
... | |||
) |
For low priority messages.
They are handled in the same way as messages logged by wxLogMessage() by the default logger but could be handled differently by the custom loggers.
Include file:
#include <wx/log.h>
void wxLogMessage | ( | const char * | formatString, |
... | |||
) |
For all normal, informational messages.
They also appear in a message box by default (but it can be changed).
Include file:
#include <wx/log.h>
void wxLogStatus | ( | const char * | formatString, |
... | |||
) |
void wxLogStatus | ( | wxFrame * | frame, |
const char * | formatString, | ||
... | |||
) |
Messages logged by this function will appear in the statusbar of the frame or of the top level application window by default (i.e.
when using the second version of the functions).
If the target frame doesn't have a statusbar, the message will be lost.
Include file:
#include <wx/log.h>
void wxLogSysError | ( | const char * | formatString, |
... | |||
) |
Mostly used by wxWidgets itself, but might be handy for logging errors after system call (API function) failure.
It logs the specified message text as well as the last system error code (errno or GetLastError() depending on the platform) and the corresponding error message. The second form of this function takes the error code explicitly as the first argument.
Include file:
#include <wx/log.h>
void wxLogTrace | ( | const char * | mask, |
const char * | formatString, | ||
... | |||
) |
Log a message at wxLOG_Trace
log level (see wxLogLevelValues enum).
Notice that the use of trace masks is not recommended any more as setting the log components (please see Log Messages Selection) provides a way to do the same thing for log messages of any level, and not just the tracing ones.
Like wxLogDebug(), trace functions only do something in debug builds and expand to nothing in the release one. The reason for making it a separate function is that usually there are a lot of trace messages, so it might make sense to separate them from other debug messages.
Trace messages can be separated into different categories; these functions in facts only log the message if the given mask is currently enabled in wxLog. This lets you selectively trace only some operations and not others by enabling the desired trace masks with wxLog::AddTraceMask() or by setting the WXTRACE
environment variable.
The predefined string trace masks used by wxWidgets are:
wxTRACE_MemAlloc | Trace memory allocation (new/delete) |
wxTRACE_Messages | Trace window messages/X callbacks |
wxTRACE_ResAlloc | Trace GDI resource allocation |
wxTRACE_RefCount | Trace various ref counting operations |
wxTRACE_OleCalls | Trace OLE method calls (Win32 only) |
Include file:
#include <wx/log.h>
void wxLogTrace | ( | wxTraceMask | mask, |
const char * | formatString, | ||
... | |||
) |
Like wxLogDebug(), trace functions only do something in debug builds and expand to nothing in the release one.
The reason for making it a separate function is that usually there are a lot of trace messages, so it might make sense to separate them from other debug messages.
The following bitmasks are defined for wxTraceMask:
wxTraceMemAlloc | Trace memory allocation (new/delete) |
wxTraceMessages | Trace window messages/X callbacks |
wxTraceResAlloc | Trace GDI resource allocation |
wxTraceRefCount | Trace various ref counting operations |
wxTraceOleCalls | Trace OLE method calls (Win32 only) |
Include file:
#include <wx/log.h>
void wxLogVerbose | ( | const char * | formatString, |
... | |||
) |
For verbose output.
Messages generated by these functions are suppressed by default, even if the log level is higher than wxLOG_Info and need to be explicitly activated by calling wxLog::SetVerbose().
Notice that this is done automatically by wxWidgets, unless the standard command line handling is overridden, if --verbose
option is specified on the program command line, so using these functions provides a simple way of having some diagnostic messages not shown by default but which can be easily shown by the user if needed.
Include file:
#include <wx/log.h>
void wxLogWarning | ( | const char * | formatString, |
... | |||
) |
For warnings - they are also normally shown to the user, but don't interrupt the program work.
Include file:
#include <wx/log.h>
This function shows a message to the user in a safe way and should be safe to call even before the application has been initialized or if it is currently in some other strange state (for example, about to crash).
Under Windows this function shows a message box using a native dialog instead of wxMessageBox() (which might be unsafe to call), elsewhere it simply prints the message to the standard output using the title as prefix.
title | The title of the message box shown to the user or the prefix of the message string. |
text | The text to show to the user. |
Include file:
#include <wx/log.h>
unsigned long wxSysErrorCode | ( | ) |
Returns the error code from the last system call.
This function uses errno
on Unix platforms and GetLastError
under Win32.
Include file:
#include <wx/log.h>
const wxChar* wxSysErrorMsg | ( | unsigned long | errCode = 0 | ) |
Returns the error message corresponding to the given system error code.
If errCode is 0 (default), the last error code (as returned by wxSysErrorCode()) is used.
Use wxSysErrorMsgStr() instead of this function especially in a multi-threaded application.
Include file:
#include <wx/log.h>
wxString wxSysErrorMsgStr | ( | unsigned long | errCode = 0 | ) |
Returns the error message corresponding to the given system error code.
If errCode is 0 (default), the last error code (as returned by wxSysErrorCode()) is used.
Use this function instead of wxSysErrorMsg(), as the latter one is not thread-safe.
Include file:
#include <wx/log.h>
void wxTrace | ( | const wxString & | format, |
... | |||
) |
Takes printf-style variable argument syntax. Output is directed to the current output stream (see wxDebugContext).
Include file:
#include <wx/memory.h>
void wxTraceLevel | ( | int | level, |
const wxString & | format, | ||
... | |||
) |
Takes printf() style variable argument syntax. Output is directed to the current output stream (see wxDebugContext). The first argument should be the level at which this information is appropriate. It will only be output if the level returned by wxDebugContext::GetLevel() is equal to or greater than this value.
Include file:
#include <wx/memory.h>
void wxVLogDebug | ( | const char * | formatString, |
va_list | argPtr | ||
) |
void wxVLogError | ( | const char * | formatString, |
va_list | argPtr | ||
) |
void wxVLogFatalError | ( | const char * | formatString, |
va_list | argPtr | ||
) |
void wxVLogGeneric | ( | wxLogLevel | level, |
const char * | formatString, | ||
va_list | argPtr | ||
) |
void wxVLogInfo | ( | const char * | formatString, |
va_list | argPtr | ||
) |
void wxVLogMessage | ( | const char * | formatString, |
va_list | argPtr | ||
) |
void wxVLogStatus | ( | const char * | formatString, |
va_list | argPtr | ||
) |
void wxVLogStatus | ( | wxFrame * | frame, |
const char * | formatString, | ||
va_list | argPtr | ||
) |
void wxVLogSysError | ( | const char * | formatString, |
va_list | argPtr | ||
) |
void wxVLogTrace | ( | const char * | mask, |
const char * | formatString, | ||
va_list | argPtr | ||
) |
void wxVLogTrace | ( | wxTraceMask | mask, |
const char * | formatString, | ||
va_list | argPtr | ||
) |
void wxVLogVerbose | ( | const char * | formatString, |
va_list | argPtr | ||
) |
void wxVLogWarning | ( | const char * | formatString, |
va_list | argPtr | ||
) |