OpenBoard/src/domain/UBPageSizeUndoCommand.cpp

/*
 * Copyright (C) 2012 Webdoc SA
 *
 * This file is part of Open-Sankoré.
 *
 * Open-Sankoré is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation, version 2,
 * with a specific linking exception for the OpenSSL project's
 * "OpenSSL" library (or with modified versions of it that use the
 * same license as the "OpenSSL" library).
 *
 * Open-Sankoré is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with Open-Sankoré; if not, see
 * <http://www.gnu.org/licenses/>.
 */


#include "UBPageSizeUndoCommand.h"

#include <QtGui>

#include "core/UBApplication.h"
#include "board/UBBoardController.h"
#include "UBGraphicsScene.h"

#include "core/memcheck.h"

UBPageSizeUndoCommand::UBPageSizeUndoCommand(UBGraphicsScene* pScene, const QSize& previousSize, const QSize& newSize)
    : mScene(pScene)
        , mPreviousSize(previousSize)
        , mNewSize(newSize)
{
    mFirstRedo = true;
}

UBPageSizeUndoCommand::~UBPageSizeUndoCommand()
{
   //NOOP
}

void UBPageSizeUndoCommand::undo()
{
    if (!mScene){
        return;
    }

    UBApplication::boardController->setPageSize(mPreviousSize);
    // force refresh, QT is a bit lazy and take a lot of time (nb item ^2 ?) to trigger repaint
    mScene->update(mScene->sceneRect());

}

void UBPageSizeUndoCommand::redo()
{
    // the Undo framework calls a redo while appending the undo command.
    // as we have already plotted the elements, we do not want to do it twice
    if (!mFirstRedo)
    {
        if (!mScene){
            return;
        }

        UBApplication::boardController->setPageSize(mNewSize);
        // force refresh, QT is a bit lazy and take a lot of time (nb item ^2) to trigger repaint
        mScene->update(mScene->sceneRect());
    }
    else
    {
        mFirstRedo = false;
    }
}