doc/src/snippets/qlistview-dnd/model.cpp
changeset 0 1918ee327afb
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc/src/snippets/qlistview-dnd/model.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,169 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (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 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of an example program for Qt.
+** EDITIONS: NOLIMITS
+**
+****************************************************************************/
+
+/*
+  model.cpp
+
+  A simple model that uses a QStringList as its data source.
+*/
+
+#include <QtGui>
+
+#include "model.h"
+
+DragDropListModel::DragDropListModel(const QStringList &strings,
+                                     QObject *parent)
+    : QStringListModel(strings, parent)
+{
+}
+
+//! [0]
+bool DragDropListModel::dropMimeData(const QMimeData *data,
+    Qt::DropAction action, int row, int column, const QModelIndex &parent)
+{
+    if (action == Qt::IgnoreAction)
+        return true;
+
+    if (!data->hasFormat("application/vnd.text.list"))
+        return false;
+
+    if (column > 0)
+//! [0] //! [1]
+        return false;
+//! [1]
+
+//! [2]
+    int beginRow;
+
+    if (row != -1)
+        beginRow = row;
+//! [2] //! [3]
+    else if (parent.isValid())
+        beginRow = parent.row();
+//! [3] //! [4]
+    else
+        beginRow = rowCount(QModelIndex());
+//! [4]
+
+//! [5]
+    QByteArray encodedData = data->data("application/vnd.text.list");
+    QDataStream stream(&encodedData, QIODevice::ReadOnly);
+    QStringList newItems;
+    int rows = 0;
+
+    while (!stream.atEnd()) {
+        QString text;
+        stream >> text;
+        newItems << text;
+        ++rows;
+    }
+//! [5]
+
+//! [6]
+    insertRows(beginRow, rows, QModelIndex());
+    foreach (QString text, newItems) {
+        QModelIndex idx = index(beginRow, 0, QModelIndex());
+        setData(idx, text);
+        beginRow++;
+    }
+
+    return true;
+}
+//! [6]
+
+//! [7]
+Qt::ItemFlags DragDropListModel::flags(const QModelIndex &index) const
+{
+    Qt::ItemFlags defaultFlags = QStringListModel::flags(index);
+
+    if (index.isValid())
+        return Qt::ItemIsDragEnabled | Qt::ItemIsDropEnabled | defaultFlags;
+    else
+        return Qt::ItemIsDropEnabled | defaultFlags;
+}
+//! [7]
+
+//! [8]
+QMimeData *DragDropListModel::mimeData(const QModelIndexList &indexes) const
+{
+    QMimeData *mimeData = new QMimeData();
+    QByteArray encodedData;
+
+    QDataStream stream(&encodedData, QIODevice::WriteOnly);
+
+    foreach (QModelIndex index, indexes) {
+        if (index.isValid()) {
+            QString text = data(index, Qt::DisplayRole).toString();
+            stream << text;
+        }
+    }
+
+    mimeData->setData("application/vnd.text.list", encodedData);
+    return mimeData;
+}
+//! [8]
+
+//! [9]
+QStringList DragDropListModel::mimeTypes() const
+{
+    QStringList types;
+    types << "application/vnd.text.list";
+    return types;
+}
+//! [9]
+
+//! [10]
+Qt::DropActions DragDropListModel::supportedDropActions() const
+{
+    return Qt::CopyAction | Qt::MoveAction;
+}
+//! [10]