Initial import from the monolithic Qt.

This is the beginning of revision history for this module. If you
want to look at revision history older than this, please refer to the
Qt Git wiki for how to use Git history grafting. At the time of
writing, this wiki is located here:

http://qt.gitorious.org/qt/pages/GitIntroductionWithQt

If you have already performed the grafting and you don't see any
history beyond this commit, try running "git log" with the "--follow"
argument.

Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 308 insertions, 0 deletions

diff --git a/src/gui/itemviews/qstringlistmodel.cpp b/src/gui/itemviews/qstringlistmodel.cpp
new file mode 100644
index 0000000000..d2e4c2204e
--- /dev/null
+++ b/src/gui/itemviews/qstringlistmodel.cpp
@@ -0,0 +1,308 @@
+/****************************************************************************
+**
+** 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 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)
+{
+    emit beginResetModel();
+    lst = strings;
+    emit endResetModel();
+}
+
+/*!
+  \reimp
+*/
+Qt::DropActions QStringListModel::supportedDropActions() const
+{
+    return QAbstractItemModel::supportedDropActions() | Qt::MoveAction;
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_STRINGLISTMODEL