gwenview/lib/cropimageoperation.cpp

   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 // Self
  22 #include "cropimageoperation.h"
  23
  24 // Qt
  25 #include <QImage>
  26 #include <QPainter>
  27
  28 // KDE
  29 #include <kdebug.h>
  30 #include <klocale.h>
  31
  32 // Local
  33 #include "document/document.h"
  34 #include "document/abstractdocumenteditor.h"
  35
  36 namespace Gwenview {
  37
  38
  39 struct CropImageOperationPrivate {
  40         QRect mRect;
  41         QImage mOriginalImage;
  42 };
  43
  44
  45 CropImageOperation::CropImageOperation(const QRect& rect)
  46 : d(new CropImageOperationPrivate) {
  47         d->mRect = rect;
  48         setText(i18n("Crop"));
  49 }
  50
  51
  52 CropImageOperation::~CropImageOperation() {
  53         delete d;
  54 }
  55
  56
  57 void CropImageOperation::redo() {
  58         QImage src = document()->image();
  59         d->mOriginalImage = src;
  60         QImage dst(d->mRect.size(), src.format());
  61         QPainter painter(&dst);
  62         painter.setCompositionMode(QPainter::CompositionMode_Source);
  63         painter.drawImage(QPoint(0, 0), src, d->mRect);
  64         painter.end();
  65         if (!document()->editor()) {
  66                 kWarning() << "!document->editor()";
  67                 return;
  68         }
  69         document()->editor()->setImage(dst);
  70 }
  71
  72
  73 void CropImageOperation::undo() {
  74         if (!document()->editor()) {
  75                 kWarning() << "!document->editor()";
  76                 return;
  77         }
  78         document()->editor()->setImage(d->mOriginalImage);
  79 }
  80
  81
  82 } // namespace