| Version: 3.2.5

Public Member Functions | Protected Member Functions | List of all members
wxLogFormatter Class Reference
Class List by Category » Logging

`#include <wx/log.h>`

## Detailed Description

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

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);
}
};
wxLogFormatter
wxLogFormatter class is used to format the log messages.
Definition: log.h:126
wxLogFormatter::Format
virtual wxString Format(wxLogLevel level, const wxString &msg, const wxLogRecordInfo &info) const
This function creates the full log message string.
wxLogRecordInfo
Information about a log record (unit of the log output).
Definition: log.h:41
wxLogRecordInfo::line
int line
The line number at which this log message was generated.
Definition: log.h:47
wxLogRecordInfo::filename
const char * filename
The name of the file where this log message was generated.
Definition: log.h:44
wxLogRecordInfo::threadId
wxThreadIdType threadId
Id of the thread in which the message was generated.
Definition: log.h:79
wxString
String class for passing textual data to or receiving it from wxWidgets.
Definition: string.h:315
wxString::Format
static wxString Format(const wxString &format,...)
This static function returns the string containing the result of calling Printf() with the passed par...
wxLogLevel
unsigned long wxLogLevel
The type used to specify a log level.
Definition: log.h:35

And then associate it with wxLog instance using its SetFormatter(). Then, if you call:

wxLogMessage(_("*** Application started ***"));
wxLogMessage
void wxLogMessage(const char *formatString,...)
For all normal, informational messages.
_
const wxString & _(const wxString &string)
Macro to be used around all literal strings that should be translated.

the log output could be something like:

        [7872] d:\testApp\src\testApp.cpp(85) : *** Application started ***

##

Library: wxBase
Category: Logging

See also
  Logging Overview

Since
  2.9.4

## Public Member Functions

| wxLogFormatter ()
| The default ctor does nothing. More...
virtual wxString | Format (wxLogLevel level, const wxString &msg, const wxLogRecordInfo &info) const
| This function creates the full log message string. More...

## Protected Member Functions

virtual wxString | FormatTimeMS (wxLongLong_t msec) const
| This function formats the time stamp part of the log message including milliseconds. More...
virtual wxString | FormatTime (time_t time) const
| This function formats the time stamp part of the log message. More...

## Constructor & Destructor Documentation

## ◆ wxLogFormatter()

wxLogFormatter::wxLogFormatter | ( |  | ) |

The default ctor does nothing.

## Member Function Documentation

## ◆ Format()

virtual wxString wxLogFormatter::Format | ( | wxLogLevel | level,
|  | const wxString & | msg,
|  | const wxLogRecordInfo & | info
| ) |  | const

virtual

This function creates the full log message string.

Override it to customize the output string format.

Parameters

  level | The level of this log record, e.g. wxLOG_Error.
  msg | The log message itself.
  info | All the other information (such as time, component, location...) associated with this log record.

Returns
  The formatted message.

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().

## ◆ FormatTime()

virtual wxString wxLogFormatter::FormatTime | ( | time_t | time | ) | const

protected virtual

This function formats the time stamp part of the log message.

Deprecated:
  This function only exists for compatibility, please override FormatTimeMS() in the new code.

Override this function if you need to customize just the time stamp.

Parameters

  time | Time to format.

Returns
  The formatted time string, may be empty.

## ◆ FormatTimeMS()

virtual wxString wxLogFormatter::FormatTimeMS | ( | wxLongLong_t | msec | ) | const

protected virtual

This function formats the time stamp part of the log message including milliseconds.

Override this function if you need to customize just the time stamp formatting in the log messages.

Parameters

  msec | Time to format as the number of milliseconds since 1970-01-01T00:00:00.

Returns
  The formatted time string, may be empty.

Since
  3.1.5