gwenview/lib/signalblocker.h

   1 // vim: set tabstop=4 shiftwidth=4 noexpandtab:
   2 /*
   3 Gwenview: an image viewer
   4 Copyright 2007 Aurélien Gâteau <aurelien.gateau@free.fr>
   5
   6 This program is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU General Public License
   8 as published by the Free Software Foundation; either version 2
   9 of the License, or (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19
  20 */
  21 #ifndef SIGNALBLOCKER_H
  22 #define SIGNALBLOCKER_H
  23
  24 #include <QObject>
  25
  26
  27 namespace Gwenview {
  28
  29
  30 /**
  31  * An RAII class to block and unblock signals from a QObject instance
  32  */
  33 class SignalBlocker {
  34 public:
  35         SignalBlocker(QObject* object) {
  36                 mObject = object;
  37                 mWasBlocked = object->blockSignals(true);
  38         }
  39
  40         ~SignalBlocker() {
  41                 mObject->blockSignals(mWasBlocked);
  42         }
  43
  44 private:
  45         QObject* mObject;
  46         bool mWasBlocked;
  47 };
  48
  49
  50 } // namespace
  51
  52
  53 #endif /* SIGNALBLOCKER_H */