Qt 4.7: delegate.cpp Example File (itemviews/spinboxdelegate/delegate.cpp)

Qt Reference Documentation

# delegate.cpp Example File

itemviews/spinboxdelegate/delegate.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
     ** All rights reserved.
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
     **     the names of its contributors may be used to endorse or promote
     **     products derived from this software without specific prior written
     **     permission.
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     /*
         delegate.cpp

         A delegate that allows the user to change integer values from the model
         using a spin box widget.
     */

     #include <QtGui>

     #include "delegate.h"

     SpinBoxDelegate::SpinBoxDelegate(QObject *parent)
         : QItemDelegate(parent)
     {
     }

     QWidget *SpinBoxDelegate::createEditor(QWidget *parent,
         const QStyleOptionViewItem &/* option */,
         const QModelIndex &/* index */) const
     {
         QSpinBox *editor = new QSpinBox(parent);
         editor->setMinimum(0);
         editor->setMaximum(100);

         return editor;
     }

     void SpinBoxDelegate::setEditorData(QWidget *editor,
                                         const QModelIndex &index) const
     {
         int value = index.model()->data(index, Qt::EditRole).toInt();

         QSpinBox *spinBox = static_cast<QSpinBox*>(editor);
         spinBox->setValue(value);
     }

     void SpinBoxDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
                                        const QModelIndex &index) const
     {
         QSpinBox *spinBox = static_cast<QSpinBox*>(editor);
         spinBox->interpretText();
         int value = spinBox->value();

         model->setData(index, value, Qt::EditRole);
     }

     void SpinBoxDelegate::updateEditorGeometry(QWidget *editor,
         const QStyleOptionViewItem &option, const QModelIndex &/* index */) const
     {
         editor->setGeometry(option.rect);
     }