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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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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 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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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 ** |
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44 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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45 ** All rights reserved. |
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46 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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47 ** |
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48 ** This file is part of an example program for Qt. |
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49 ** EDITIONS: NOLIMITS |
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50 ** |
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51 ****************************************************************************/ |
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52 |
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53 /* |
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54 model.cpp |
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55 |
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56 A simple model that uses a QStringList as its data source. |
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57 */ |
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58 |
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59 #include <QtGui> |
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60 |
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61 #include "model.h" |
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62 |
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63 DragDropListModel::DragDropListModel(const QStringList &strings, |
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64 QObject *parent) |
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65 : QStringListModel(strings, parent) |
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66 { |
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67 } |
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68 |
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69 //! [0] |
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70 bool DragDropListModel::dropMimeData(const QMimeData *data, |
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71 Qt::DropAction action, int row, int column, const QModelIndex &parent) |
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72 { |
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73 if (action == Qt::IgnoreAction) |
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74 return true; |
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75 |
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76 if (!data->hasFormat("application/vnd.text.list")) |
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77 return false; |
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78 |
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79 if (column > 0) |
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80 //! [0] //! [1] |
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81 return false; |
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82 //! [1] |
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83 |
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84 //! [2] |
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85 int beginRow; |
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86 |
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87 if (row != -1) |
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88 beginRow = row; |
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89 //! [2] //! [3] |
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90 else if (parent.isValid()) |
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91 beginRow = parent.row(); |
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92 //! [3] //! [4] |
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93 else |
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94 beginRow = rowCount(QModelIndex()); |
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95 //! [4] |
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96 |
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97 //! [5] |
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98 QByteArray encodedData = data->data("application/vnd.text.list"); |
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99 QDataStream stream(&encodedData, QIODevice::ReadOnly); |
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100 QStringList newItems; |
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101 int rows = 0; |
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102 |
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103 while (!stream.atEnd()) { |
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104 QString text; |
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105 stream >> text; |
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106 newItems << text; |
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107 ++rows; |
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108 } |
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109 //! [5] |
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110 |
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111 //! [6] |
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112 insertRows(beginRow, rows, QModelIndex()); |
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113 foreach (QString text, newItems) { |
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114 QModelIndex idx = index(beginRow, 0, QModelIndex()); |
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115 setData(idx, text); |
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116 beginRow++; |
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117 } |
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118 |
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119 return true; |
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120 } |
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121 //! [6] |
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122 |
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123 //! [7] |
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124 Qt::ItemFlags DragDropListModel::flags(const QModelIndex &index) const |
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125 { |
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126 Qt::ItemFlags defaultFlags = QStringListModel::flags(index); |
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127 |
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128 if (index.isValid()) |
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129 return Qt::ItemIsDragEnabled | Qt::ItemIsDropEnabled | defaultFlags; |
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130 else |
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131 return Qt::ItemIsDropEnabled | defaultFlags; |
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132 } |
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133 //! [7] |
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134 |
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135 //! [8] |
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136 QMimeData *DragDropListModel::mimeData(const QModelIndexList &indexes) const |
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137 { |
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138 QMimeData *mimeData = new QMimeData(); |
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139 QByteArray encodedData; |
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140 |
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141 QDataStream stream(&encodedData, QIODevice::WriteOnly); |
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142 |
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143 foreach (QModelIndex index, indexes) { |
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144 if (index.isValid()) { |
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145 QString text = data(index, Qt::DisplayRole).toString(); |
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146 stream << text; |
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147 } |
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148 } |
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149 |
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150 mimeData->setData("application/vnd.text.list", encodedData); |
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151 return mimeData; |
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152 } |
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153 //! [8] |
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154 |
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155 //! [9] |
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156 QStringList DragDropListModel::mimeTypes() const |
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157 { |
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158 QStringList types; |
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159 types << "application/vnd.text.list"; |
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160 return types; |
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161 } |
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162 //! [9] |
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163 |
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164 //! [10] |
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165 Qt::DropActions DragDropListModel::supportedDropActions() const |
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166 { |
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167 return Qt::CopyAction | Qt::MoveAction; |
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168 } |
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169 //! [10] |