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/****************************************************************************

**

** 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 an example program for Qt.

** EDITIONS: NOLIMITS

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****************************************************************************/

/*

  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]