wxLogNull

This class allows to temporarily suspend logging. All calls to the log functions during the life time of an object of this class are just ignored.

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 all log messages are suppressed, even if they indicate a completely different error than the one the programmer wanted to suppress.

For instance, the example of the overview:

  wxFile file;

  // 通常はファイルを開けなかった場合に wxFile.Open() がエラーメッセージを出力するが、そうさせたくない
  {
    wxLogNull logNo;
    if ( !file.Open("bar") )
      ... 自分自身でエラー処理を行なう ...
  } // ~wxLogNull が呼ばれ、古いログ出力先が元に戻される

  wxLogMessage("..."); // ok

  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
  {
      ...
  }

wxLog

インクルードファイル

<wx/log.h>

Members

wxLogNull::wxLogNull
wxLogNull::~wxLogNull

wxLogNull::wxLogNull

wxLogNull()

Suspends logging.

wxLogNull::~wxLogNull

Resumes logging.