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annotate libgui/src/workspace-view.cc @ 15367:501a9cc2c68f

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maint: whitespace cleanup in GUI code
author Jordi Gutiérrez Hermoso <jordigh@octave.org>
date Wed, 12 Sep 2012 16:34:39 -0400
parents b565850bdce7
children 36ececf69385
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2
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3 Copyright (C) 2011-2012 Jacob Dawid
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include "workspace-view.h"
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28 #include "resource-manager.h"
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29 #include <QHBoxLayout>
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30 #include <QVBoxLayout>
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31 #include <QPushButton>
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32
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33 workspace_view::workspace_view (QWidget * parent) : QDockWidget
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34 (parent)
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35 {
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36 setObjectName ("WorkspaceView");
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37 setWindowTitle (tr ("Workspace"));
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38
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39 // Create a new workspace model.
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40 _workspace_model = new workspace_model ();
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41
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42 _workspace_tree_view = new QTreeView (this); // Create a new tree view.
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43 _workspace_tree_view->setHeaderHidden (false); // Do not show header columns.
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44 _workspace_tree_view->setAlternatingRowColors (true); // Activate alternating row colors.
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45 _workspace_tree_view->setAnimated (false); // Deactivate animations because of strange glitches.
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46 _workspace_tree_view->setTextElideMode (Qt::ElideRight);// Elide text to the right side of the cells.
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47 _workspace_tree_view->setWordWrap (false); // No wordwrapping in cells.
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48 _workspace_tree_view->setModel (_workspace_model); // Assign model.
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49
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50 // Set an empty widget, so we can assign a layout to it.
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51 setWidget (new QWidget (this));
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52
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53 // Create a new layout and add widgets to it.
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54 QVBoxLayout *layout = new QVBoxLayout ();
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55 layout->addWidget (_workspace_tree_view);
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56 layout->setMargin (2);
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57
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58 // Set the empty widget to have our layout.
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59 widget ()->setLayout (layout);
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60
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61 // Initialize collapse/expand state of the workspace subcategories.
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62
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63 QSettings *settings = resource_manager::get_settings ();
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64
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65 // FIXME -- what should happen if settings is 0?
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66
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67 _explicit_collapse.local = settings->value ("workspaceview/local_collapsed", false).toBool ();
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68 _explicit_collapse.global = settings->value ("workspaceview/global_collapsed", false).toBool ();;
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69 _explicit_collapse.persistent = settings->value ("workspaceview/persistent_collapsed", false).toBool ();;
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71 // Connect signals and slots.
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72 connect (this, SIGNAL (visibilityChanged (bool)),
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73 this, SLOT(handle_visibility_changed (bool)));
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74
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75 connect (_workspace_model, SIGNAL (model_changed ()),
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76 this, SLOT (model_changed ()));
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77
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78 connect (_workspace_tree_view, SIGNAL (collapsed (QModelIndex)),
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79 this, SLOT (collapse_requested (QModelIndex)));
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80 connect (_workspace_tree_view, SIGNAL (expanded (QModelIndex)),
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81 this, SLOT (expand_requested (QModelIndex)));
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82
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83 connect (_workspace_tree_view, SIGNAL (doubleClicked (QModelIndex)),
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84 this, SLOT (item_double_clicked (QModelIndex)));
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85
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86 }
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87
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88 workspace_view::~workspace_view ()
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89 {
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90 QSettings *settings = resource_manager::get_settings ();
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91
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92 // FIXME -- what should happen if settings is 0?
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93
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94 settings->setValue("workspaceview/local_collapsed", _explicit_collapse.local);
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95 settings->setValue("workspaceview/global_collapsed", _explicit_collapse.global);
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96 settings->setValue("workspaceview/persistent_collapsed", _explicit_collapse.persistent);
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97 }
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98
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99 void
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100 workspace_view::handle_visibility_changed (bool visible)
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101 {
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102 if (visible)
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103 emit active_changed (true);
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104 }
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105
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106 void
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107 workspace_view::model_changed ()
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108 {
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109 // This code is very quirky and requires some explanation.
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110 // Usually, we should not deal with collapsing or expanding ourselves,
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111 // because the view itself determines (based on the model) whether it
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112 // is appropriate to collapse or expand items.
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113 //
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114 // Now, the logic requires that we update our model item by item, which
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115 // would make it work correctly, but this is extremely slow and scales
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116 // very bad (O(n^2)). That's why we throw away our model and rebuild it
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117 // completely from scratch (O(n)), which is why the view renders all
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118 // displayed data as invalid.
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119 //
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120 // In order to make collapsing/expanding work again, we need to set
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121 // flags ourselves here.
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122
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123 QModelIndex local_model_index = _workspace_model->index (0, 0);
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124 QModelIndex global_model_index = _workspace_model->index (1, 0);
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125 QModelIndex persistent_model_index = _workspace_model->index (2, 0);
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126
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127 if (_explicit_collapse.local) {
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128 _workspace_tree_view->collapse (local_model_index);
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129 } else {
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130 _workspace_tree_view->expand (local_model_index);
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131 }
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132
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133 if (_explicit_collapse.global) {
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134 _workspace_tree_view->collapse (global_model_index);
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135 } else {
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136 _workspace_tree_view->expand (global_model_index);
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137 }
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138
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139 if (_explicit_collapse.persistent) {
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140 _workspace_tree_view->collapse (persistent_model_index);
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141 } else {
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142 _workspace_tree_view->expand (persistent_model_index);
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143 }
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144 }
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145
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146 void
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147 workspace_view::collapse_requested (QModelIndex index)
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148 {
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149 // This code is very quirky and requires some explanation.
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150 // Usually, we should not deal with collapsing or expanding ourselves,
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151 // because the view itself determines (based on the model) whether it
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152 // is appropriate to collapse or expand items.
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153 //
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154 // Now, the logic requires that we update our model item by item, which
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155 // would make it work correctly, but this is extremely slow and scales
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156 // very bad (O(n^2)). That's why we throw away our model and rebuild it
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157 // completely from scratch (O(n)), which is why the view renders all
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158 // displayed data as invalid.
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159 //
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160 // In order to make collapsing/expanding work again, we need to set
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161 // flags ourselves here.
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162 QMap<int, QVariant> item_data
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163 = _workspace_model->itemData (index);
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164
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165 if (item_data[0] == "Local")
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166 _explicit_collapse.local = true;
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167 if (item_data[0] == "Global")
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168 _explicit_collapse.global = true;
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169 if (item_data[0] == "Persistent")
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170 _explicit_collapse.persistent = true;
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171 }
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172
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173 void
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174 workspace_view::expand_requested (QModelIndex index)
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175 {
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176 // This code is very quirky and requires some explanation.
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177 // Usually, we should not deal with collapsing or expanding ourselves,
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178 // because the view itself determines (based on the model) whether it
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179 // is appropriate to collapse or expand items.
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180 //
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181 // Now, the logic requires that we update our model item by item, which
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182 // would make it work correctly, but this is extremely slow and scales
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183 // very bad (O(n^2)). That's why we throw away our model and rebuild it
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184 // completely from scratch (O(n)), which is why the view renders all
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185 // displayed data as invalid.
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186 //
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187 // In order to make collapsing/expanding work again, we need to do set
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188 // flags ourselves here.
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189 QMap<int, QVariant> item_data
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190 = _workspace_model->itemData (index);
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191
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192 if (item_data[0] == "Local")
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193 _explicit_collapse.local = false;
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194 if (item_data[0] == "Global")
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195 _explicit_collapse.global = false;
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196 if (item_data[0] == "Persistent")
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197 _explicit_collapse.persistent = false;
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198 }
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199
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200 void
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201 workspace_view::item_double_clicked (QModelIndex index)
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202 {
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203 Q_UNUSED (index);
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204 // TODO: Implement opening a dialog that allows the user to change a variable in the workspace.
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205 }
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206
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207 void
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208 workspace_view::closeEvent (QCloseEvent *event)
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209 {
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210 emit active_changed (false);
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211 QDockWidget::closeEvent (event);
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212 }