Mercurial > octave
annotate libgui/src/workspace-view.cc @ 15460:7f36f7dc25b2
save and restore the columns order and width of the workspace-view
* workspace-view.cc: restore columns state in constructor and save in destructor
author | Torsten <ttl@justmail.de> |
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date | Sun, 30 Sep 2012 12:55:25 +0200 |
parents | f918db8102d5 |
children | bbbb89cc338f |
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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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 <QHeaderView> |
13501 | 30 #include <QHBoxLayout> |
31 #include <QVBoxLayout> | |
32 #include <QPushButton> | |
33 | |
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34 workspace_view::workspace_view (QWidget *p) |
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35 : QDockWidget (p) |
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36 { |
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37 setObjectName ("WorkspaceView"); |
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38 setWindowTitle (tr ("Workspace")); |
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39 |
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40 // Create a new workspace model. |
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41 _workspace_model = new workspace_model (); |
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42 |
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43 _workspace_tree_view = new QTreeView (this); // Create a new tree view. |
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44 _workspace_tree_view->setHeaderHidden (false); // Do not show header columns. |
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45 _workspace_tree_view->setAlternatingRowColors (true); // Activate alternating row colors. |
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46 _workspace_tree_view->setAnimated (false); // Deactivate animations because of strange glitches. |
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47 _workspace_tree_view->setTextElideMode (Qt::ElideRight);// Elide text to the right side of the cells. |
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48 _workspace_tree_view->setWordWrap (false); // No wordwrapping in cells. |
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49 _workspace_tree_view->setModel (_workspace_model); // Assign model. |
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50 |
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51 // Set an empty widget, so we can assign a layout to it. |
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52 setWidget (new QWidget (this)); |
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53 |
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54 // Create a new layout and add widgets to it. |
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55 QVBoxLayout *vbox_layout = new QVBoxLayout (); |
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56 vbox_layout->addWidget (_workspace_tree_view); |
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57 vbox_layout->setMargin (2); |
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58 |
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59 // Set the empty widget to have our layout. |
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60 widget ()->setLayout (vbox_layout); |
13501 | 61 |
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62 // Initialize collapse/expand state of the workspace subcategories. |
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63 |
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64 QSettings *settings = resource_manager::get_settings (); |
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65 |
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66 // FIXME -- what should happen if settings is 0? |
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67 |
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68 _explicit_collapse.local = settings->value ("workspaceview/local_collapsed", false).toBool (); |
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69 _explicit_collapse.global = settings->value ("workspaceview/global_collapsed", false).toBool ();; |
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70 _explicit_collapse.persistent = settings->value ("workspaceview/persistent_collapsed", false).toBool ();; |
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71 |
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72 // Initialize column order and width of the workspace |
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73 |
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74 _workspace_tree_view->header ()->restoreState (settings->value("workspaceview/column_state").toByteArray ()); |
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75 |
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76 // Connect signals and slots. |
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77 connect (this, SIGNAL (visibilityChanged (bool)), |
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78 this, SLOT(handle_visibility_changed (bool))); |
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80 connect (_workspace_model, SIGNAL (model_changed ()), |
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81 this, SLOT (model_changed ())); |
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82 |
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83 connect (_workspace_tree_view, SIGNAL (collapsed (QModelIndex)), |
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84 this, SLOT (collapse_requested (QModelIndex))); |
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85 connect (_workspace_tree_view, SIGNAL (expanded (QModelIndex)), |
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86 this, SLOT (expand_requested (QModelIndex))); |
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87 |
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88 connect (_workspace_tree_view, SIGNAL (doubleClicked (QModelIndex)), |
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89 this, SLOT (item_double_clicked (QModelIndex))); |
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90 |
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91 } |
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92 |
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93 workspace_view::~workspace_view () |
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94 { |
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95 QSettings *settings = resource_manager::get_settings (); |
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96 |
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97 // FIXME -- what should happen if settings is 0? |
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98 |
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99 settings->setValue("workspaceview/local_collapsed", _explicit_collapse.local); |
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100 settings->setValue("workspaceview/global_collapsed", _explicit_collapse.global); |
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101 settings->setValue("workspaceview/persistent_collapsed", _explicit_collapse.persistent); |
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102 settings->setValue("workspaceview/column_state", _workspace_tree_view->header ()->saveState ()); |
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103 } |
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104 |
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105 void |
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106 workspace_view::handle_visibility_changed (bool visible) |
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107 { |
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108 if (visible) |
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109 emit active_changed (true); |
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110 } |
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111 |
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112 void |
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113 workspace_view::model_changed () |
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114 { |
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115 // This code is very quirky and requires some explanation. |
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116 // Usually, we should not deal with collapsing or expanding ourselves, |
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117 // because the view itself determines (based on the model) whether it |
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118 // is appropriate to collapse or expand items. |
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119 // |
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120 // Now, the logic requires that we update our model item by item, which |
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121 // would make it work correctly, but this is extremely slow and scales |
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122 // very bad (O(n^2)). That's why we throw away our model and rebuild it |
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123 // completely from scratch (O(n)), which is why the view renders all |
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124 // displayed data as invalid. |
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125 // |
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126 // In order to make collapsing/expanding work again, we need to set |
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127 // flags ourselves here. |
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128 |
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129 QModelIndex local_model_index = _workspace_model->index (0, 0); |
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130 QModelIndex global_model_index = _workspace_model->index (1, 0); |
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131 QModelIndex persistent_model_index = _workspace_model->index (2, 0); |
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132 |
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133 if (_explicit_collapse.local) { |
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134 _workspace_tree_view->collapse (local_model_index); |
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135 } else { |
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136 _workspace_tree_view->expand (local_model_index); |
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137 } |
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138 |
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139 if (_explicit_collapse.global) { |
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140 _workspace_tree_view->collapse (global_model_index); |
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141 } else { |
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142 _workspace_tree_view->expand (global_model_index); |
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143 } |
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144 |
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145 if (_explicit_collapse.persistent) { |
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146 _workspace_tree_view->collapse (persistent_model_index); |
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147 } else { |
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148 _workspace_tree_view->expand (persistent_model_index); |
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149 } |
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150 } |
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151 |
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152 void |
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153 workspace_view::collapse_requested (QModelIndex index) |
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154 { |
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155 // This code is very quirky and requires some explanation. |
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156 // Usually, we should not deal with collapsing or expanding ourselves, |
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157 // because the view itself determines (based on the model) whether it |
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158 // is appropriate to collapse or expand items. |
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159 // |
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160 // Now, the logic requires that we update our model item by item, which |
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161 // would make it work correctly, but this is extremely slow and scales |
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162 // very bad (O(n^2)). That's why we throw away our model and rebuild it |
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163 // completely from scratch (O(n)), which is why the view renders all |
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164 // displayed data as invalid. |
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165 // |
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166 // In order to make collapsing/expanding work again, we need to set |
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167 // flags ourselves here. |
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168 QMap<int, QVariant> item_data |
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169 = _workspace_model->itemData (index); |
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170 |
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171 if (item_data[0] == "Local") |
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172 _explicit_collapse.local = true; |
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173 if (item_data[0] == "Global") |
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174 _explicit_collapse.global = true; |
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175 if (item_data[0] == "Persistent") |
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176 _explicit_collapse.persistent = true; |
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177 } |
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178 |
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179 void |
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180 workspace_view::expand_requested (QModelIndex index) |
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181 { |
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182 // This code is very quirky and requires some explanation. |
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183 // Usually, we should not deal with collapsing or expanding ourselves, |
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184 // because the view itself determines (based on the model) whether it |
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185 // is appropriate to collapse or expand items. |
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186 // |
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187 // Now, the logic requires that we update our model item by item, which |
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188 // would make it work correctly, but this is extremely slow and scales |
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189 // very bad (O(n^2)). That's why we throw away our model and rebuild it |
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190 // completely from scratch (O(n)), which is why the view renders all |
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191 // displayed data as invalid. |
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192 // |
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193 // In order to make collapsing/expanding work again, we need to do set |
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194 // flags ourselves here. |
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195 QMap<int, QVariant> item_data |
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196 = _workspace_model->itemData (index); |
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197 |
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198 if (item_data[0] == "Local") |
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199 _explicit_collapse.local = false; |
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200 if (item_data[0] == "Global") |
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201 _explicit_collapse.global = false; |
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202 if (item_data[0] == "Persistent") |
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203 _explicit_collapse.persistent = false; |
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204 } |
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205 |
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206 void |
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207 workspace_view::item_double_clicked (QModelIndex) |
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208 { |
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209 // TODO: Implement opening a dialog that allows the user to change a variable in the workspace. |
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210 } |
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211 |
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212 void |
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213 workspace_view::closeEvent (QCloseEvent *e) |
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214 { |
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215 emit active_changed (false); |
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216 QDockWidget::closeEvent (e); |
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217 } |