1 | /****************************************************************************
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2 | **
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3 | ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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4 | ** Contact: Qt Software Information ([email protected])
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5 | **
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6 | ** This file is part of the examples of the Qt Toolkit.
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7 | **
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8 | ** $QT_BEGIN_LICENSE:LGPL$
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9 | ** Commercial Usage
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10 | ** Licensees holding valid Qt Commercial licenses may use this file in
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11 | ** accordance with the Qt Commercial License Agreement provided with the
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12 | ** Software or, alternatively, in accordance with the terms contained in
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13 | ** a written agreement between you and Nokia.
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14 | **
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15 | ** GNU Lesser General Public License Usage
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16 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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17 | ** General Public License version 2.1 as published by the Free Software
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18 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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19 | ** packaging of this file. Please review the following information to
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20 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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21 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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22 | **
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23 | ** In addition, as a special exception, Nokia gives you certain
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24 | ** additional rights. These rights are described in the Nokia Qt LGPL
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25 | ** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
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26 | ** package.
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27 | **
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28 | ** GNU General Public License Usage
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29 | ** Alternatively, this file may be used under the terms of the GNU
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30 | ** General Public License version 3.0 as published by the Free Software
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31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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32 | ** packaging of this file. Please review the following information to
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33 | ** ensure the GNU General Public License version 3.0 requirements will be
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34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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35 | **
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36 | ** If you are unsure which license is appropriate for your use, please
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37 | ** contact the sales department at [email protected].
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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 | #include <QtGui>
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43 |
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44 | #include "settingstree.h"
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45 | #include "variantdelegate.h"
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46 |
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47 | SettingsTree::SettingsTree(QWidget *parent)
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48 | : QTreeWidget(parent)
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49 | {
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50 | setItemDelegate(new VariantDelegate(this));
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51 |
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52 | QStringList labels;
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53 | labels << tr("Setting") << tr("Type") << tr("Value");
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54 | setHeaderLabels(labels);
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55 | header()->setResizeMode(0, QHeaderView::Stretch);
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56 | header()->setResizeMode(2, QHeaderView::Stretch);
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57 |
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58 | settings = 0;
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59 | refreshTimer.setInterval(2000);
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60 | autoRefresh = false;
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61 |
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62 | groupIcon.addPixmap(style()->standardPixmap(QStyle::SP_DirClosedIcon),
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63 | QIcon::Normal, QIcon::Off);
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64 | groupIcon.addPixmap(style()->standardPixmap(QStyle::SP_DirOpenIcon),
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65 | QIcon::Normal, QIcon::On);
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66 | keyIcon.addPixmap(style()->standardPixmap(QStyle::SP_FileIcon));
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67 |
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68 | connect(&refreshTimer, SIGNAL(timeout()), this, SLOT(maybeRefresh()));
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69 | }
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70 |
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71 | void SettingsTree::setSettingsObject(QSettings *settings)
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72 | {
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73 | delete this->settings;
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74 | this->settings = settings;
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75 | clear();
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76 |
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77 | if (settings) {
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78 | settings->setParent(this);
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79 | refresh();
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80 | if (autoRefresh)
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81 | refreshTimer.start();
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82 | } else {
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83 | refreshTimer.stop();
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84 | }
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85 | }
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86 |
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87 | QSize SettingsTree::sizeHint() const
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88 | {
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89 | return QSize(800, 600);
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90 | }
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91 |
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92 | void SettingsTree::setAutoRefresh(bool autoRefresh)
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93 | {
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94 | this->autoRefresh = autoRefresh;
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95 | if (settings) {
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96 | if (autoRefresh) {
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97 | maybeRefresh();
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98 | refreshTimer.start();
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99 | } else {
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100 | refreshTimer.stop();
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101 | }
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102 | }
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103 | }
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104 |
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105 | void SettingsTree::setFallbacksEnabled(bool enabled)
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106 | {
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107 | if (settings) {
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108 | settings->setFallbacksEnabled(enabled);
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109 | refresh();
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110 | }
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111 | }
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112 |
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113 | void SettingsTree::maybeRefresh()
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114 | {
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115 | if (state() != EditingState)
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116 | refresh();
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117 | }
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118 |
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119 | void SettingsTree::refresh()
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120 | {
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121 | if (!settings)
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122 | return;
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123 |
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124 | disconnect(this, SIGNAL(itemChanged(QTreeWidgetItem *, int)),
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125 | this, SLOT(updateSetting(QTreeWidgetItem *)));
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126 |
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127 | settings->sync();
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128 | updateChildItems(0);
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129 |
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130 | connect(this, SIGNAL(itemChanged(QTreeWidgetItem *, int)),
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131 | this, SLOT(updateSetting(QTreeWidgetItem *)));
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132 | }
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133 |
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134 | bool SettingsTree::event(QEvent *event)
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135 | {
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136 | if (event->type() == QEvent::WindowActivate) {
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137 | if (isActiveWindow() && autoRefresh)
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138 | maybeRefresh();
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139 | }
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140 | return QTreeWidget::event(event);
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141 | }
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142 |
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143 | void SettingsTree::updateSetting(QTreeWidgetItem *item)
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144 | {
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145 | QString key = item->text(0);
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146 | QTreeWidgetItem *ancestor = item->parent();
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147 | while (ancestor) {
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148 | key.prepend(ancestor->text(0) + "/");
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149 | ancestor = ancestor->parent();
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150 | }
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151 |
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152 | settings->setValue(key, item->data(2, Qt::UserRole));
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153 | if (autoRefresh)
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154 | refresh();
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155 | }
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156 |
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157 | void SettingsTree::updateChildItems(QTreeWidgetItem *parent)
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158 | {
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159 | int dividerIndex = 0;
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160 |
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161 | foreach (QString group, settings->childGroups()) {
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162 | QTreeWidgetItem *child;
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163 | int childIndex = findChild(parent, group, dividerIndex);
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164 | if (childIndex != -1) {
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165 | child = childAt(parent, childIndex);
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166 | child->setText(1, "");
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167 | child->setText(2, "");
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168 | child->setData(2, Qt::UserRole, QVariant());
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169 | moveItemForward(parent, childIndex, dividerIndex);
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170 | } else {
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171 | child = createItem(group, parent, dividerIndex);
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172 | }
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173 | child->setIcon(0, groupIcon);
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174 | ++dividerIndex;
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175 |
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176 | settings->beginGroup(group);
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177 | updateChildItems(child);
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178 | settings->endGroup();
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179 | }
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180 |
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181 | foreach (QString key, settings->childKeys()) {
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182 | QTreeWidgetItem *child;
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183 | int childIndex = findChild(parent, key, 0);
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184 |
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185 | if (childIndex == -1 || childIndex >= dividerIndex) {
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186 | if (childIndex != -1) {
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187 | child = childAt(parent, childIndex);
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188 | for (int i = 0; i < child->childCount(); ++i)
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189 | delete childAt(child, i);
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190 | moveItemForward(parent, childIndex, dividerIndex);
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191 | } else {
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192 | child = createItem(key, parent, dividerIndex);
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193 | }
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194 | child->setIcon(0, keyIcon);
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195 | ++dividerIndex;
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196 | } else {
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197 | child = childAt(parent, childIndex);
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198 | }
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199 |
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200 | QVariant value = settings->value(key);
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201 | if (value.type() == QVariant::Invalid) {
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202 | child->setText(1, "Invalid");
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203 | } else {
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204 | child->setText(1, value.typeName());
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205 | }
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206 | child->setText(2, VariantDelegate::displayText(value));
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207 | child->setData(2, Qt::UserRole, value);
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208 | }
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209 |
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210 | while (dividerIndex < childCount(parent))
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211 | delete childAt(parent, dividerIndex);
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212 | }
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213 |
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214 | QTreeWidgetItem *SettingsTree::createItem(const QString &text,
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215 | QTreeWidgetItem *parent, int index)
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216 | {
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217 | QTreeWidgetItem *after = 0;
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218 | if (index != 0)
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219 | after = childAt(parent, index - 1);
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220 |
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221 | QTreeWidgetItem *item;
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222 | if (parent)
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223 | item = new QTreeWidgetItem(parent, after);
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224 | else
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225 | item = new QTreeWidgetItem(this, after);
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226 |
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227 | item->setText(0, text);
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228 | item->setFlags(item->flags() | Qt::ItemIsEditable);
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229 | return item;
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230 | }
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231 |
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232 | QTreeWidgetItem *SettingsTree::childAt(QTreeWidgetItem *parent, int index)
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233 | {
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234 | if (parent)
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235 | return parent->child(index);
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236 | else
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237 | return topLevelItem(index);
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238 | }
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239 |
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240 | int SettingsTree::childCount(QTreeWidgetItem *parent)
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241 | {
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242 | if (parent)
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243 | return parent->childCount();
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244 | else
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245 | return topLevelItemCount();
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246 | }
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247 |
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248 | int SettingsTree::findChild(QTreeWidgetItem *parent, const QString &text,
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249 | int startIndex)
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250 | {
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251 | for (int i = startIndex; i < childCount(parent); ++i) {
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252 | if (childAt(parent, i)->text(0) == text)
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253 | return i;
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254 | }
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255 | return -1;
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256 | }
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257 |
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258 | void SettingsTree::moveItemForward(QTreeWidgetItem *parent, int oldIndex,
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259 | int newIndex)
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260 | {
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261 | for (int i = 0; i < oldIndex - newIndex; ++i)
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262 | delete childAt(parent, newIndex);
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263 | }
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