1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the documentation of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

    32 **

    33 **

    34 **

    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 /****************************************************************************

    43 **

    44 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

    45 ** All rights reserved.

    46 ** Contact: Nokia Corporation (qt-info@nokia.com)

    47 **

    48 ** This file is part of an example program for Qt.

    49 ** EDITIONS: NOLIMITS

    50 **

    51 ****************************************************************************/

    52 

    53 #include <QtGui>

    54 

    55 #include "dragdropmodel.h"

    56 

    57 DragDropModel::DragDropModel(const QStringList &strings, QObject *parent)

    58     : TreeModel(strings, parent)

    59 {

    60 }

    61 

    62 bool DragDropModel::dropMimeData(const QMimeData *data,

    63     Qt::DropAction action, int row, int column, const QModelIndex &parent)

    64 {

    65     if (action == Qt::IgnoreAction)

    66         return true;

    67 

    68     if (!data->hasFormat("text/plain"))

    69         return false;

    70 

    71     int beginRow;

    72 

    73     if (row != -1)

    74         beginRow = row;

    75     else if (parent.isValid())

    76         beginRow = 0;

    77     else

    78         beginRow = rowCount(QModelIndex());

    79 

    80     QByteArray encodedData = data->data("text/plain");

    81     QDataStream stream(&encodedData, QIODevice::ReadOnly);

    82     QHash<qint64, QMap<int,QHash<int,QString> > > newItems;

    83 

    84     while (!stream.atEnd()) {

    85         qint64 id;

    86         int row;

    87         int column;

    88         QString text;

    89         stream >> id >> row >> column >> text;

    90         newItems[id][row][column] = text;

    91     }

    92     int rows = newItems.count();

    93 

    94     insertRows(beginRow, rows, parent);

    95     QMap<int,QHash<int,QString> > childItems;

    96     foreach (childItems, newItems.values()) {

    97         QHash<int,QString> rowItems;

    98         foreach (rowItems, childItems.values()) {

    99             foreach (int column, rowItems.keys()) {

   100                 QModelIndex idx = index(beginRow, column, parent);

   101                 setData(idx, rowItems[column]);

   102             }

   103             ++beginRow;

   104         }

   105     }

   106 

   107     return true;

   108 }

   109 

   110 Qt::ItemFlags DragDropModel::flags(const QModelIndex &index) const

   111 {

   112     Qt::ItemFlags defaultFlags = TreeModel::flags(index);

   113 

   114     if (index.isValid())

   115         return Qt::ItemIsDragEnabled | Qt::ItemIsDropEnabled | defaultFlags;

   116     else

   117         return Qt::ItemIsDropEnabled | defaultFlags;

   118 }

   119 

   120 QMimeData *DragDropModel::mimeData(const QModelIndexList &indexes) const

   121 {

   122     QMimeData *mimeData = new QMimeData();

   123     QByteArray encodedData;

   124 

   125     QDataStream stream(&encodedData, QIODevice::WriteOnly);

   126 

   127     foreach (QModelIndex index, indexes) {

   128         if (index.isValid()) {

   129             QString text = data(index, Qt::DisplayRole).toString();

   130             stream << index.internalId() << index.row() << index.column() << text;

   131         }

   132     }

   133 

   134     mimeData->setData("text/plain", encodedData);

   135     return mimeData;

   136 }

   137 

   138 QStringList DragDropModel::mimeTypes() const

   139 {

   140     QStringList types;

   141     types << "text/plain";

   142     return types;

   143 }

   144 

   145 Qt::DropActions DragDropModel::supportedDropActions() const

   146 {

   147     return Qt::CopyAction | Qt::MoveAction;

   148 }