--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/util/src/gui/itemviews/qstringlistmodel.cpp Wed Mar 31 11:06:36 2010 +0300
@@ -0,0 +1,307 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*
+ A simple model that uses a QStringList as its data source.
+*/
+
+#include "qstringlistmodel.h"
+
+#ifndef QT_NO_STRINGLISTMODEL
+
+QT_BEGIN_NAMESPACE
+
+/*!
+ \class QStringListModel
+ \brief The QStringListModel class provides a model that supplies strings to views.
+
+ \ingroup model-view
+
+
+ QStringListModel is an editable model that can be used for simple
+ cases where you need to display a number of strings in a view
+ widget, such as a QListView or a QComboBox.
+
+ The model provides all the standard functions of an editable
+ model, representing the data in the string list as a model with
+ one column and a number of rows equal to the number of items in
+ the list.
+
+ Model indexes corresponding to items are obtained with the
+ \l{QAbstractListModel::index()}{index()} function, and item flags
+ are obtained with flags(). Item data is read with the data()
+ function and written with setData(). The number of rows (and
+ number of items in the string list) can be found with the
+ rowCount() function.
+
+ The model can be constructed with an existing string list, or
+ strings can be set later with the setStringList() convenience
+ function. Strings can also be inserted in the usual way with the
+ insertRows() function, and removed with removeRows(). The contents
+ of the string list can be retrieved with the stringList()
+ convenience function.
+
+ An example usage of QStringListModel:
+
+ \snippet doc/src/snippets/qstringlistmodel/main.cpp 0
+
+ \sa QAbstractListModel, QAbstractItemModel, {Model Classes}
+*/
+
+/*!
+ Constructs a string list model with the given \a parent.
+*/
+
+QStringListModel::QStringListModel(QObject *parent)
+ : QAbstractListModel(parent)
+{
+}
+
+/*!
+ Constructs a string list model containing the specified \a strings
+ with the given \a parent.
+*/
+
+QStringListModel::QStringListModel(const QStringList &strings, QObject *parent)
+ : QAbstractListModel(parent), lst(strings)
+{
+}
+
+/*!
+ Returns the number of rows in the model. This value corresponds to the
+ number of items in the model's internal string list.
+
+ The optional \a parent argument is in most models used to specify
+ the parent of the rows to be counted. Because this is a list if a
+ valid parent is specified, the result will always be 0.
+
+ \sa insertRows(), removeRows(), QAbstractItemModel::rowCount()
+*/
+
+int QStringListModel::rowCount(const QModelIndex &parent) const
+{
+ if (parent.isValid())
+ return 0;
+
+ return lst.count();
+}
+
+/*!
+ Returns data for the specified \a role, from the item with the
+ given \a index.
+
+ If the view requests an invalid index, an invalid variant is returned.
+
+ \sa setData()
+*/
+
+QVariant QStringListModel::data(const QModelIndex &index, int role) const
+{
+ if (index.row() < 0 || index.row() >= lst.size())
+ return QVariant();
+
+ if (role == Qt::DisplayRole || role == Qt::EditRole)
+ return lst.at(index.row());
+
+ return QVariant();
+}
+
+/*!
+ Returns the flags for the item with the given \a index.
+
+ Valid items are enabled, selectable, editable, drag enabled and drop enabled.
+
+ \sa QAbstractItemModel::flags()
+*/
+
+Qt::ItemFlags QStringListModel::flags(const QModelIndex &index) const
+{
+ if (!index.isValid())
+ return QAbstractItemModel::flags(index) | Qt::ItemIsDropEnabled;
+
+ return QAbstractItemModel::flags(index) | Qt::ItemIsEditable | Qt::ItemIsDragEnabled | Qt::ItemIsDropEnabled;
+}
+
+/*!
+ Sets the data for the specified \a role in the item with the given
+ \a index in the model, to the provided \a value.
+
+ The dataChanged() signal is emitted if the item is changed.
+
+ \sa Qt::ItemDataRole, data()
+*/
+
+bool QStringListModel::setData(const QModelIndex &index, const QVariant &value, int role)
+{
+ if (index.row() >= 0 && index.row() < lst.size()
+ && (role == Qt::EditRole || role == Qt::DisplayRole)) {
+ lst.replace(index.row(), value.toString());
+ emit dataChanged(index, index);
+ return true;
+ }
+ return false;
+}
+
+/*!
+ Inserts \a count rows into the model, beginning at the given \a row.
+
+ The \a parent index of the rows is optional and is only used for
+ consistency with QAbstractItemModel. By default, a null index is
+ specified, indicating that the rows are inserted in the top level of
+ the model.
+
+ \sa QAbstractItemModel::insertRows()
+*/
+
+bool QStringListModel::insertRows(int row, int count, const QModelIndex &parent)
+{
+ if (count < 1 || row < 0 || row > rowCount(parent))
+ return false;
+
+ beginInsertRows(QModelIndex(), row, row + count - 1);
+
+ for (int r = 0; r < count; ++r)
+ lst.insert(row, QString());
+
+ endInsertRows();
+
+ return true;
+}
+
+/*!
+ Removes \a count rows from the model, beginning at the given \a row.
+
+ The \a parent index of the rows is optional and is only used for
+ consistency with QAbstractItemModel. By default, a null index is
+ specified, indicating that the rows are removed in the top level of
+ the model.
+
+ \sa QAbstractItemModel::removeRows()
+*/
+
+bool QStringListModel::removeRows(int row, int count, const QModelIndex &parent)
+{
+ if (count <= 0 || row < 0 || (row + count) > rowCount(parent))
+ return false;
+
+ beginRemoveRows(QModelIndex(), row, row + count - 1);
+
+ for (int r = 0; r < count; ++r)
+ lst.removeAt(row);
+
+ endRemoveRows();
+
+ return true;
+}
+
+static bool ascendingLessThan(const QPair<QString, int> &s1, const QPair<QString, int> &s2)
+{
+ return s1.first < s2.first;
+}
+
+static bool decendingLessThan(const QPair<QString, int> &s1, const QPair<QString, int> &s2)
+{
+ return s1.first > s2.first;
+}
+
+/*!
+ \reimp
+*/
+void QStringListModel::sort(int, Qt::SortOrder order)
+{
+ emit layoutAboutToBeChanged();
+
+ QList<QPair<QString, int> > list;
+ for (int i = 0; i < lst.count(); ++i)
+ list.append(QPair<QString, int>(lst.at(i), i));
+
+ if (order == Qt::AscendingOrder)
+ qSort(list.begin(), list.end(), ascendingLessThan);
+ else
+ qSort(list.begin(), list.end(), decendingLessThan);
+
+ lst.clear();
+ QVector<int> forwarding(list.count());
+ for (int i = 0; i < list.count(); ++i) {
+ lst.append(list.at(i).first);
+ forwarding[list.at(i).second] = i;
+ }
+
+ QModelIndexList oldList = persistentIndexList();
+ QModelIndexList newList;
+ for (int i = 0; i < oldList.count(); ++i)
+ newList.append(index(forwarding.at(oldList.at(i).row()), 0));
+ changePersistentIndexList(oldList, newList);
+
+ emit layoutChanged();
+}
+
+/*!
+ Returns the string list used by the model to store data.
+*/
+QStringList QStringListModel::stringList() const
+{
+ return lst;
+}
+
+/*!
+ Sets the model's internal string list to \a strings. The model will
+ notify any attached views that its underlying data has changed.
+
+ \sa dataChanged()
+*/
+void QStringListModel::setStringList(const QStringList &strings)
+{
+ lst = strings;
+ reset();
+}
+
+/*!
+ \reimp
+*/
+Qt::DropActions QStringListModel::supportedDropActions() const
+{
+ return QAbstractItemModel::supportedDropActions() | Qt::MoveAction;
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_STRINGLISTMODEL