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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*
+ model.cpp
+
+ A simple model that uses a QStringList as its data source.
+*/
+
+#include <qdebug.h>
+
+#include "model.h"
+
+/*!
+ Returns the number of items in the string list as the number of rows
+ in the model.
+*/
+
+int StringListModel::rowCount(const QModelIndex &parent) const
+{
+ return stringList.count();
+}
+
+/*!
+ Returns an appropriate value for the requested data.
+ If the view requests an invalid index, an invalid variant is returned.
+ If a header is requested then we just return the column or row number,
+ depending on the orientation of the header.
+ Any valid index that corresponds to a string in the list causes that
+ string to be returned.
+*/
+
+QVariant StringListModel::data(const QModelIndex &index, int role) const
+{
+ if (!index.isValid())
+ return QVariant();
+
+ if (index.row() < 0 || index.row() >= stringList.size())
+ return QVariant();
+
+ if (role == Qt::DisplayRole)
+ return stringList.at(index.row());
+ else
+ return QVariant();
+}
+
+/*!
+ Returns the appropriate header string depending on the orientation of
+ the header and the section. If anything other than the display role is
+ requested, we return an invalid variant.
+*/
+
+QVariant StringListModel::headerData(int section, Qt::Orientation orientation,
+ int role) const
+{
+ if (role != Qt::DisplayRole)
+ return QVariant();
+
+ if (orientation == Qt::Horizontal)
+ return QString("Column %1").arg(section);
+ else
+ return QString("Row %1").arg(section);
+}
+
+/*!
+ Returns an appropriate value for the item's flags. Valid items are
+ enabled, selectable, and editable.
+*/
+
+Qt::ItemFlags StringListModel::flags(const QModelIndex &index) const
+{
+ if (!index.isValid())
+ return Qt::ItemIsEnabled;
+
+ return QAbstractItemModel::flags(index) | Qt::ItemIsEditable;
+}
+
+/*!
+ Changes an item in the string list, but only if the following conditions
+ are met:
+
+ * The index supplied is valid.
+ * The index corresponds to an item to be shown in a view.
+ * The role associated with editing text is specified.
+
+ The dataChanged() signal is emitted if the item is changed.
+*/
+
+bool StringListModel::setData(const QModelIndex &index,
+ const QVariant &value, int role)
+{
+ if (index.isValid() && role == Qt::EditRole) {
+
+ stringList.replace(index.row(), value.toString());
+ emit dataChanged(index, index);
+ return true;
+ }
+ return false;
+}
+
+/*!
+ Inserts a number of rows into the model at the specified position.
+*/
+
+bool StringListModel::insertRows(int position, int rows, const QModelIndex &parent)
+{
+ beginInsertRows(parent, position, position + rows - 1);
+
+ for (int row = 0; row < rows; ++row) {
+ stringList.insert(position, "");
+ }
+
+ endInsertRows();
+ return true;
+}
+
+/*!
+ Removes a number of rows from the model at the specified position.
+*/
+
+bool StringListModel::removeRows(int position, int rows, const QModelIndex &parent)
+{
+ beginRemoveRows(parent, position, position + rows - 1);
+
+ for (int row = 0; row < rows; ++row) {
+ stringList.removeAt(position);
+ }
+
+ endRemoveRows();
+ return true;
+}