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

bookdelegate.cpp Example File
demos/books/bookdelegate.cpp

 /****************************************************************************
 **
 ** Copyright (C) 2005-2008 Trolltech ASA. All rights reserved.
 **
 ** This file is part of the documentation 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 [email protected].
**
** 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 "bookdelegate.h"

 #include <QtGui>

 BookDelegate::BookDelegate(QObject *parent)
     : QSqlRelationalDelegate(parent), star(QPixmap(":images/star.png"))
 {
 }

 void BookDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
                            const QModelIndex &index) const
 {
     if (index.column() != 5) {
         QStyleOptionViewItemV3 opt = option;
         opt.rect.adjust(0, 0, -1, -1); // since we draw the grid ourselves
         QSqlRelationalDelegate::paint(painter, opt, index);
     } else {
         const QAbstractItemModel *model = index.model();
         QPalette::ColorGroup cg = option.state & QStyle::State_Enabled
                                   ? QPalette::Normal : QPalette::Disabled;
         if (option.state & QStyle::State_Selected)
             painter->fillRect(option.rect, option.palette.color(cg, QPalette::Highlight));

         int rating = model->data(index, Qt::DisplayRole).toInt();
         int width = star.width();
         int height = star.height();
         int x = option.rect.x();
         int y = option.rect.y() + (option.rect.height() / 2) - (height / 2);
         for (int i = 0; i < rating; ++i) {
             painter->drawPixmap(x, y, star);
             x += width;
         }
         drawFocus(painter, option, option.rect.adjusted(0, 0, -1, -1)); // since we draw the grid ourselves
     }

     QPen pen = painter->pen();
     painter->setPen(option.palette.color(QPalette::Mid));
     painter->drawLine(option.rect.bottomLeft(), option.rect.bottomRight());
     painter->drawLine(option.rect.topRight(), option.rect.bottomRight());
     painter->setPen(pen);
 }

 QSize BookDelegate::sizeHint(const QStyleOptionViewItem &option,
                                  const QModelIndex &index) const
 {
     if (index.column() == 5)
         return QSize(5 * star.width(), star.height()) + QSize(1, 1);

     return QSqlRelationalDelegate::sizeHint(option, index) + QSize(1, 1); // since we draw the grid ourselves
 }

 bool BookDelegate::editorEvent(QEvent *event, QAbstractItemModel *model,
                                const QStyleOptionViewItem &option,
                                const QModelIndex &index)
 {
     if (index.column() != 5)
         return QSqlRelationalDelegate::editorEvent(event, model, option, index);

     QMouseEvent *mouseEvent;
     int stars;

     switch (event->type()) {
         case QEvent::MouseButtonPress:
             mouseEvent = static_cast<QMouseEvent*>(event);
             stars = qBound(0, int(0.7 + qreal(mouseEvent->pos().x()
                               - option.rect.x()) / star.width()), 5);
             model->setData(index, QVariant(stars));
             break;
         default:
             break;
     }

     return true;
 }

 QWidget *BookDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option,
                                     const QModelIndex &index) const
 {
     if (index.column() != 4)
         return QSqlRelationalDelegate::createEditor(parent, option, index);

     // for editing the year, return a spinbox with a range from -1000 to 2100.
     QSpinBox *sb = new QSpinBox(parent);
     sb->setFrame(false);
     sb->setMaximum(2100);
     sb->setMinimum(-1000);

     return sb;
 }


Copyright © 2008 Trolltech Trademarks
Qt 4.3.5