1 | /****************************************************************************
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2 | **
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3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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4 | ** All rights reserved.
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5 | ** Contact: Nokia Corporation ([email protected])
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6 | **
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7 | ** This file is part of the documentation of the Qt Toolkit.
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8 | **
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9 | ** $QT_BEGIN_LICENSE:BSD$
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10 | ** You may use this file under the terms of the BSD license as follows:
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11 | **
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12 | ** "Redistribution and use in source and binary forms, with or without
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13 | ** modification, are permitted provided that the following conditions are
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14 | ** met:
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15 | ** * Redistributions of source code must retain the above copyright
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16 | ** notice, this list of conditions and the following disclaimer.
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17 | ** * Redistributions in binary form must reproduce the above copyright
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18 | ** notice, this list of conditions and the following disclaimer in
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19 | ** the documentation and/or other materials provided with the
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20 | ** distribution.
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21 | ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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22 | ** the names of its contributors may be used to endorse or promote
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23 | ** products derived from this software without specific prior written
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24 | ** permission.
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25 | **
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26 | ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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27 | ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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28 | ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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29 | ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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30 | ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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31 | ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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32 | ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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33 | ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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34 | ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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35 | ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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36 | ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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37 | ** $QT_END_LICENSE$
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38 | **
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39 | ****************************************************************************/
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40 |
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41 | /****************************************************************************
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42 | **
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43 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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44 | ** All rights reserved.
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45 | ** Contact: Nokia Corporation ([email protected])
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46 | **
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47 | ** This file is part of an example program for Qt.
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48 | ** EDITIONS: NOLIMITS
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49 | **
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50 | ****************************************************************************/
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51 |
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52 | /*
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53 | model.cpp
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54 |
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55 | A simple model that uses a QStringList as its data source.
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56 | */
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57 |
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58 | #include <QtGui>
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59 |
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60 | #include "model.h"
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61 |
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62 | DragDropListModel::DragDropListModel(const QStringList &strings,
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63 | QObject *parent)
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64 | : QStringListModel(strings, parent)
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65 | {
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66 | }
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67 |
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68 | //! [0]
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69 | bool DragDropListModel::dropMimeData(const QMimeData *data,
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70 | Qt::DropAction action, int row, int column, const QModelIndex &parent)
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71 | {
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72 | if (action == Qt::IgnoreAction)
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73 | return true;
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74 |
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75 | if (!data->hasFormat("application/vnd.text.list"))
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76 | return false;
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77 |
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78 | if (column > 0)
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79 | //! [0] //! [1]
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80 | return false;
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81 | //! [1]
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82 |
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83 | //! [2]
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84 | int beginRow;
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85 |
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86 | if (row != -1)
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87 | beginRow = row;
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88 | //! [2] //! [3]
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89 | else if (parent.isValid())
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90 | beginRow = parent.row();
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91 | //! [3] //! [4]
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92 | else
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93 | beginRow = rowCount(QModelIndex());
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94 | //! [4]
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95 |
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96 | //! [5]
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97 | QByteArray encodedData = data->data("application/vnd.text.list");
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98 | QDataStream stream(&encodedData, QIODevice::ReadOnly);
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99 | QStringList newItems;
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100 | int rows = 0;
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101 |
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102 | while (!stream.atEnd()) {
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103 | QString text;
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104 | stream >> text;
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105 | newItems << text;
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106 | ++rows;
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107 | }
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108 | //! [5]
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109 |
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110 | //! [6]
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111 | insertRows(beginRow, rows, QModelIndex());
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112 | foreach (const QString &text, newItems) {
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113 | QModelIndex idx = index(beginRow, 0, QModelIndex());
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114 | setData(idx, text);
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115 | beginRow++;
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116 | }
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117 |
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118 | return true;
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119 | }
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120 | //! [6]
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121 |
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122 | //! [7]
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123 | Qt::ItemFlags DragDropListModel::flags(const QModelIndex &index) const
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124 | {
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125 | Qt::ItemFlags defaultFlags = QStringListModel::flags(index);
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126 |
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127 | if (index.isValid())
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128 | return Qt::ItemIsDragEnabled | Qt::ItemIsDropEnabled | defaultFlags;
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129 | else
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130 | return Qt::ItemIsDropEnabled | defaultFlags;
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131 | }
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132 | //! [7]
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133 |
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134 | //! [8]
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135 | QMimeData *DragDropListModel::mimeData(const QModelIndexList &indexes) const
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136 | {
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137 | QMimeData *mimeData = new QMimeData();
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138 | QByteArray encodedData;
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139 |
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140 | QDataStream stream(&encodedData, QIODevice::WriteOnly);
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141 |
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142 | foreach (const QModelIndex &index, indexes) {
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143 | if (index.isValid()) {
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144 | QString text = data(index, Qt::DisplayRole).toString();
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145 | stream << text;
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146 | }
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147 | }
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148 |
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149 | mimeData->setData("application/vnd.text.list", encodedData);
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150 | return mimeData;
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151 | }
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152 | //! [8]
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153 |
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154 | //! [9]
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155 | QStringList DragDropListModel::mimeTypes() const
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156 | {
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157 | QStringList types;
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158 | types << "application/vnd.text.list";
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159 | return types;
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160 | }
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161 | //! [9]
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162 |
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163 | //! [10]
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164 | Qt::DropActions DragDropListModel::supportedDropActions() const
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165 | {
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166 | return Qt::CopyAction | Qt::MoveAction;
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167 | }
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168 | //! [10]
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