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1 /****************************************************************************
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2 **
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3 ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
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4 ** Contact: Qt Software Information (qt-info@nokia.com)
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5 **
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6 ** This file is part of the demonstration applications of the Qt Toolkit.
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7 **
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8 ** Commercial Usage
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9 ** Licensees holding valid Qt Commercial licenses may use this file in
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10 ** accordance with the Qt Commercial License Agreement provided with the
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11 ** Software or, alternatively, in accordance with the terms contained in
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12 ** a written agreement between you and Nokia.
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13 **
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14 **
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15 ** GNU General Public License Usage
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16 ** Alternatively, this file may be used under the terms of the GNU
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17 ** General Public License versions 2.0 or 3.0 as published by the Free
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18 ** Software Foundation and appearing in the file LICENSE.GPL included in
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19 ** the packaging of this file. Please review the following information
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20 ** to ensure GNU General Public Licensing requirements will be met:
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21 ** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
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22 ** http://www.gnu.org/copyleft/gpl.html. In addition, as a special
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23 ** exception, Nokia gives you certain additional rights. These rights
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24 ** are described in the Nokia Qt GPL Exception version 1.3, included in
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25 ** the file GPL_EXCEPTION.txt in this package.
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26 **
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27 ** Qt for Windows(R) Licensees
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28 ** As a special exception, Nokia, as the sole copyright holder for Qt
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29 ** Designer, grants users of the Qt/Eclipse Integration plug-in the
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30 ** right for the Qt/Eclipse Integration to link to functionality
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31 ** provided by Qt Designer and its related libraries.
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32 **
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33 ** If you are unsure which license is appropriate for your use, please
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34 ** contact the sales department at qt-sales@nokia.com.
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35 **
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36 ****************************************************************************/
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37
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211
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38 module model;
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193
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39
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40 import qt.gui.QIcon;
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41 import qt.gui.QPixmap;
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42 import qt.gui.QFileIconProvider;
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43
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44 import qt.core.QAbstractItemModel;
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45 import qt.core.QVariant;
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46 import qt.core.QModelIndex;
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47
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197
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48 import std.conv; //, std.algorithm;
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199
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49 import std.stdio;
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193
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50
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51 class Node
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52 {
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53 this(Node parent_ = null)
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54 {
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55 parent = parent_;
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56 }
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57
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58 Node parent;
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59 Node[] children;
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60 }
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199
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61
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300
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62 size_t find(const Node[] arr, const Node elem)
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197
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63 {
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64 size_t res = arr.length;
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65 for(size_t i = 0; i < arr.length; i++)
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66 if (arr[i] is elem)
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67 res = i;
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68 return res;
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69 }
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199
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70
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193
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71 class Model : QAbstractItemModel
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72 {
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73
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74 this(int rows, int columns, QObject parent = null)
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75 {
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76 super(parent);
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77 rc = rows;
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78 cc = columns;
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79 tree = new Node[rows];
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80 foreach(ref node; tree) {
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81 node = new Node;
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82 }
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83
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84 iconProvider = new QFileIconProvider;
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85
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86 folder = iconProvider.icon(QFileIconProvider.Folder);
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87 file = iconProvider.icon(QFileIconProvider.File);
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88 services = new QIcon(":/images/services.png");
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89 }
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90
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91
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300
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92 override QModelIndex index(int row, int column, const QModelIndex parent) const
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193
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93 {
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94 if (row < rc && row >= 0 && column < cc && column >= 0) {
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300
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95 auto p = cast(Node) parent.internalPointer();
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96 auto n = getNode(row, p);
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202
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97 if (n !is null)
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98 return createIndex(row, column, cast(void*)n);
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193
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99 }
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100 return QModelIndex();
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101 }
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102
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300
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103 override QModelIndex parent(const QModelIndex child) const
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193
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104 {
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105 if (child.isValid()) {
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106 Node n = cast(Node) child.internalPointer();
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107 Node p = parent(n);
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108 if (p !is null)
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109 return createIndex(row(p), 0, cast(void*)p);
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110 }
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111 return QModelIndex();
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112 }
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113
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300
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114 override int rowCount(const QModelIndex parent) const
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193
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115 {
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116 return (parent.isValid() && parent.column() != 0) ? 0 : rc;
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117 }
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118
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300
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119 override int columnCount(const QModelIndex parent) const
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193
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120 {
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121 return cc;
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122 }
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123
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300
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124 override QVariant data(const QModelIndex index, int role) const
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193
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125 {
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126 if (!index.isValid)
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127 return new QVariant;
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128 if (role == Qt.DisplayRole)
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129 return new QVariant("Item " ~ to!string(index.row) ~ ":" ~ to!string(index.column));
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130 if (role == Qt.DecorationRole) {
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131 if (index.column == 0)
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132 //return iconProvider.icon(QFileIconProvider::Folder);
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133 return folder.toVariant;
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134 return file.toVariant;
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135 }
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136 return new QVariant;
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137 }
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138
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300
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139 override QVariant headerData(int section, Qt.Orientation orientation, int role) const
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193
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140 {
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141 if (role == Qt.DisplayRole)
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142 return new QVariant(to!string(section));
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143 if (role == Qt.DecorationRole)
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144 return services.toVariant;
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145 return QAbstractItemModel.headerData(section, orientation, role);
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146 }
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147
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300
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148 override bool hasChildren(const QModelIndex parent) const
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193
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149 {
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150 if (parent.isValid && parent.column != 0)
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151 return false;
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152 return rc > 0 && cc > 0;
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153 }
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154
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300
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155 override int flags(const QModelIndex index) const
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193
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156 {
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157 if (!index.isValid)
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158 return 0;
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159 return (Qt.ItemIsDragEnabled | Qt.ItemIsSelectable | Qt.ItemIsEnabled);
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160 }
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161
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300
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162 const (Node) getNode(int row, Node parent) const
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193
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163 {
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164 if(parent !is null && parent.children.length == 0) {
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165 for(int i = 0; i < rc; i++)
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166 parent.children ~= new Node(parent);
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167 }
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168
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300
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169 auto v = parent !is null ? parent.children : tree;
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193
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170 return v[row];
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171 }
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172
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300
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173 Node parent(Node child) const
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193
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174 {
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175 return child !is null ? child.parent : null;
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176 }
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177
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300
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178 int row(Node node) const
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193
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179 {
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300
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180 auto v = node.parent !is null ? node.parent.children : tree;
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402
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181 return cast(int)find(v, node);
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193
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182 }
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183
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184
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185 int rc, cc;
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186 Node[] tree;
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187 QFileIconProvider iconProvider;
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188
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189 QIcon folder, services, file;
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190 }
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