|  | Home · All Namespaces · All Classes · Main Classes · Grouped Classes · Modules · Functions |

# starrating.cpp Example File
itemviews/stardelegate/starrating.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2007-2008 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the example classes of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
     ** License versions 2.0 or 3.0 as published by the Free Software
     ** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
     ** included in the packaging of this file.  Alternatively you may (at
     ** your option) use any later version of the GNU General Public
     ** License if such license has been publicly approved by Trolltech ASA
     ** (or its successors, if any) and the KDE Free Qt Foundation. In
     ** addition, as a special exception, Trolltech gives you certain
     ** additional rights. These rights are described in the Trolltech GPL
     ** Exception version 1.2, which can be found at
     ** http://www.trolltech.com/products/qt/gplexception/ and in the file
     ** GPL_EXCEPTION.txt in this package.
     **
     ** Please review the following information to ensure GNU General
     ** Public Licensing requirements will be met:
     ** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
     ** you are unsure which license is appropriate for your use, please
     ** review the following information:
     ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
     ** or contact the sales department at sales@trolltech.com.
     **
     ** In addition, as a special exception, Trolltech, as the sole
     ** copyright holder for Qt Designer, grants users of the Qt/Eclipse
     ** Integration plug-in the right for the Qt/Eclipse Integration to
     ** link to functionality provided by Qt Designer and its related
     ** libraries.
     **
     ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
     ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
     ** granted herein.
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #include <QtGui>
     #include <math.h>

     #include "starrating.h"

     const int PaintingScaleFactor = 20;

     StarRating::StarRating(int starCount, int maxStarCount)
     {
         myStarCount = starCount;
         myMaxStarCount = maxStarCount;

         starPolygon << QPointF(1.0, 0.5);
         for (int i = 1; i < 5; ++i)
             starPolygon << QPointF(0.5 + 0.5 * cos(0.8 * i * 3.14),
                                    0.5 + 0.5 * sin(0.8 * i * 3.14));

         diamondPolygon << QPointF(0.4, 0.5) << QPointF(0.5, 0.4)
                        << QPointF(0.6, 0.5) << QPointF(0.5, 0.6)
                        << QPointF(0.4, 0.5);
     }

     QSize StarRating::sizeHint() const
     {
         return PaintingScaleFactor * QSize(myMaxStarCount, 1);
     }

     void StarRating::paint(QPainter *painter, const QRect &rect,
                            const QPalette &palette, EditMode mode) const
     {
         painter->save();

         painter->setRenderHint(QPainter::Antialiasing, true);
         painter->setPen(Qt::NoPen);

         if (mode == Editable) {
             painter->setBrush(palette.highlight());
         } else {
             painter->setBrush(palette.foreground());
         }

         int yOffset = (rect.height() - PaintingScaleFactor) / 2;
         painter->translate(rect.x(), rect.y() + yOffset);
         painter->scale(PaintingScaleFactor, PaintingScaleFactor);

         for (int i = 0; i < myMaxStarCount; ++i) {
             if (i < myStarCount) {
                 painter->drawPolygon(starPolygon, Qt::WindingFill);
             } else if (mode == Editable) {
                 painter->drawPolygon(diamondPolygon, Qt::WindingFill);
             }
             painter->translate(1.0, 0.0);
         }

         painter->restore();
     }