src/YQSignalBlocker.h

   1 /*---------------------------------------------------------------------\
   2 |                                                                      |
   3 |                      __   __    ____ _____ ____                      |
   4 |                      \ \ / /_ _/ ___|_   _|___ \                     |
   5 |                       \ V / _` \___ \ | |   __) |                    |
   6 |                        | | (_| |___) || |  / __/                     |
   7 |                        |_|\__,_|____/ |_| |_____|                    |
   8 |                                                                      |
   9 |                               core system                            |
  10 |                                                        (C) SuSE GmbH |
  11 \----------------------------------------------------------------------/
  12
  13   File:       YQSignalBlocker.h
  14
  15   Author:     Stefan Hundhammer <sh@suse.de>
  16
  17 /-*/
  18
  19 #ifndef YQSignalBlocker_h
  20 #define YQSignalBlocker_h
  21
  22 class QObject;
  23
  24 /**
  25  * Helper class to block Qt signals for QWidgets or QObjects as long as this
  26 Y * object exists.
  27  *
  28  * This object will restore the old blocked state when it goes out of scope.
  29  **/
  30 class YQSignalBlocker
  31 {
  32 public:
  33
  34     /**
  35      * Constructor.
  36      *
  37      * Qt signals for 'qobject' will be blocked as long as this object exists.
  38      * Remember that a QWidget is also a QObject.
  39      **/
  40     YQSignalBlocker( QObject * qobject );
  41
  42     /**
  43      * Destructor.
  44      *
  45      * This will restore the old signal state.
  46      **/
  47     ~YQSignalBlocker();
  48
  49
  50 private:
  51
  52     QObject *   _qobject;
  53     bool        _oldBlockedState;
  54 };
  55
  56
  57 #endif // ifndef YQSignalBlocker_h