kalzium/libavogadro-kalzium/src/undosequence.cpp

   1 /**********************************************************************
   2   UndoSequence - Provides an sequence of Undo/Redo in a single command
   3
   4   Copyright (C) 2007 Donald Ephraim Curtis
   5
   6   This file is part of the Avogadro molecular editor project.
   7   For more information, see <http://avogadro.sourceforge.net/>
   8
   9   Avogadro is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU General Public License as published by
  11   the Free Software Foundation; either version 2 of the License, or
  12   (at your option) any later version.
  13
  14   Avogadro is distributed in the hope that it will be useful,
  15   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17   GNU General Public License for more details.
  18
  19   You should have received a copy of the GNU General Public License
  20   along with this program; if not, write to the Free Software
  21   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  22   02110-1301, USA.
  23  **********************************************************************/
  24
  25 #include <config.h>
  26 #include <avogadro/undosequence.h>
  27
  28 namespace Avogadro {
  29
  30   class UndoSequencePrivate {
  31     public:
  32       UndoSequencePrivate()  {};
  33
  34       QList<QUndoCommand *> commands;
  35   };
  36
  37   UndoSequence::UndoSequence() : d(new UndoSequencePrivate)
  38   {
  39   }
  40
  41   UndoSequence::~UndoSequence()
  42   {
  43     while(!d->commands.isEmpty()) {
  44       delete d->commands.takeFirst();
  45     }
  46     delete d;
  47   }
  48
  49   void UndoSequence::undo()
  50   {
  51     // last in first to undo
  52     for(int i=d->commands.count()-1; i >= 0; i--)
  53     {
  54       d->commands.at(i)->undo();
  55     }
  56   }
  57
  58   void UndoSequence::redo()
  59   {
  60     foreach(QUndoCommand *command, d->commands)
  61     {
  62       command->redo();
  63     }
  64   }
  65
  66   void UndoSequence::append(QUndoCommand *command)
  67   {
  68     d->commands.append(command);
  69   }
  70
  71 } // end namespace Avogadro