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annotate libgui/src/gui-settings.cc @ 31657:61834788d3aa

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get list of fonts from QFontDatabase, not QFontComboBox * gui-settings.cc (gui_settings::get_default_font_family): Get list of available fonts from the thread-safe QFontDatabase class, not QFontComboBox.
author John W. Eaton <jwe@octave.org>
date Fri, 09 Dec 2022 01:09:04 -0500
parents deb553ac2c54
children 1a1f47f17ed4
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2019-2022 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if defined (HAVE_CONFIG_H)
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27 # include "config.h"
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28 #endif
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29
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30 #include <cmath>
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31
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32 #include <QApplication>
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33 #include <QFile>
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34 #include <QFileInfo>
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35 #include <QFontDatabase>
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36 #include <QMessageBox>
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37 #include <QSettings>
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38 #include <QString>
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39 #include <QStringList>
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40
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41 #include "gui-preferences-cs.h"
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42 #include "gui-preferences-global.h"
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43 #include "gui-settings.h"
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44
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45 #include "oct-env.h"
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46
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47 OCTAVE_BEGIN_NAMESPACE(octave)
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48
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49 QString gui_settings::file_name (void) const
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50 {
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51 return fileName ();
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52 }
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53
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54 QString gui_settings::directory_name (void) const
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55 {
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56 QFileInfo sfile (fileName ());
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57
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58 return sfile.absolutePath ();
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59 }
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60
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61 QColor gui_settings::get_color_value (const QVariant& def, int mode) const
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62 {
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63 QColor default_color;
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64
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65 // Determine whether the default value in pref is given as
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66 // QPalette::ColorRole or as QColor
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67 if (def.canConvert (QMetaType::QColor))
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68 default_color = def.value<QColor> ();
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69 else
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70 {
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71 // The default colors are given as color roles for
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72 // the application's palette
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73 default_color = QApplication::palette ().color
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74 (static_cast<QPalette::ColorRole> (def.toInt ()));
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75 // FIXME: use value<QPalette::ColorRole> instead of static cast after
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76 // dropping support of Qt 5.4
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77 }
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78
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79 if ((mode == 1) && (default_color != settings_color_no_change))
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80 {
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81 // In second mode, determine the default color from the first mode
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82 qreal h, s, l, a;
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83 default_color.getHslF (&h, &s, &l, &a);
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84 qreal l_new = 1.0-l*0.85;
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85 if (l < 0.3)
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86 l_new = 1.0-l*0.7; // convert darker into lighter colors
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87 default_color.setHslF (h, s, l_new, a);
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88 }
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89
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90 return default_color;
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91 }
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92
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93 QColor gui_settings::color_value (const gui_pref& pref, int mode) const
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94 {
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95 QColor default_color = get_color_value (pref.def, mode);
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96
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97 return value (pref.key + settings_color_modes_ext[mode],
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98 QVariant (default_color)).value<QColor> ();
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99 }
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100
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101 void gui_settings::set_color_value (const gui_pref& pref,
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102 const QColor& color, int mode)
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103 {
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104 int m = mode;
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105 if (m > 1)
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106 m = 1;
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107
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108 setValue (pref.key + settings_color_modes_ext[m], QVariant (color));
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109 }
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110
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111 QString gui_settings::sc_value (const sc_pref& pref) const
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112 {
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113 QKeySequence key_seq = sc_def_value (pref);
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114
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115 // Get the value from the settings where the key sequences are stored
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116 // as strings
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117 return value (sc_group + pref.key, key_seq.toString ()).toString ();
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118 }
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119
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120 QKeySequence gui_settings::sc_def_value (const sc_pref& pref) const
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121 {
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122 QKeySequence key_seq = QKeySequence ();
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123
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124 // Check, which of the elements for the default value in the sc_pref
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125 // structure has a valid value and take this as default. If both
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126 // elements are not valid, leave the key sequence empty
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127 if (pref.def)
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128 key_seq = QKeySequence (pref.def);
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129 else if (pref.def_std != QKeySequence::UnknownKey)
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130 key_seq = QKeySequence (pref.def_std);
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131
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132 return key_seq;
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133 }
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134
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135 void gui_settings::config_icon_theme (void)
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136 {
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137 int theme_index;
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138
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139 if (contains (global_icon_theme_index.key))
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140 theme_index = value (global_icon_theme_index).toInt ();
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141 else
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142 {
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143 // New pref does not exist. Use old if required. Add new and
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144 // remove deprecated key.
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145
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146 if (value (global_icon_theme).toBool ())
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147 theme_index = ICON_THEME_SYSTEM;
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148 else
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149 theme_index = ICON_THEME_OCTAVE;
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150
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151 setValue (global_icon_theme_index.key, theme_index);
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152 remove (global_icon_theme.key);
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153 }
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154
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155 QIcon::setThemeName (global_all_icon_themes.at (theme_index));
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156
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157 QStringList icon_fallbacks;
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158
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159 // Set the required fallback search paths.
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160
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161 switch (theme_index)
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162 {
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163 case ICON_THEME_SYSTEM:
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164 icon_fallbacks << global_icon_paths.at (ICON_THEME_OCTAVE);
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165 icon_fallbacks << global_icon_paths.at (ICON_THEME_TANGO);
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166 break;
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167 case ICON_THEME_TANGO:
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168 icon_fallbacks << global_icon_paths.at (ICON_THEME_OCTAVE);
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169 break;
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170 case ICON_THEME_OCTAVE:
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171 icon_fallbacks << global_icon_paths.at (ICON_THEME_TANGO);
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172 break;
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173 }
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174
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175 icon_fallbacks << global_icon_paths.at (ICON_THEME_CURSORS);
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176
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177 setValue (global_icon_fallbacks.key, icon_fallbacks);
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178 }
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179
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180 QIcon gui_settings::icon (const QString& icon_name, bool octave_only,
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181 const QString& icon_alt_name)
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182 {
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183 if (octave_only)
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184 return QIcon (global_icon_paths.at (ICON_THEME_OCTAVE) + icon_name + ".png");
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185
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186 if (QIcon::hasThemeIcon (icon_name))
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187 return QIcon (QIcon::fromTheme (icon_name));
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188 else if ((! icon_alt_name.isEmpty ()) && QIcon::hasThemeIcon (icon_alt_name))
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189 return QIcon (QIcon::fromTheme (icon_alt_name));
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190
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191 QStringList icon_fallbacks
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192 = value (global_icon_fallbacks.key).toStringList ();
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193
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194 for (int i = 0; i < icon_fallbacks.length (); i++ )
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195 {
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196 QString icon_file (icon_fallbacks.at (i) + icon_name + ".png");
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197 if (QFile (icon_file).exists ())
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198 return QIcon (icon_file);
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199 }
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200
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201 //QIcon::setThemeName (current_theme);
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202 return QIcon ();
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203 }
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204
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205 QString gui_settings::get_default_font_family (void)
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206 {
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207 // Get all available fixed width fonts from the Qt font database.
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208
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209 QFontDatabase font_database;
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210 QStringList fonts;
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211
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212 for (QString font : font_database.families ())
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213 {
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214 if (font_database.isFixedPitch (font))
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215 fonts << font;
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216 }
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217
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218 QString default_family;
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219
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220 #if defined (Q_OS_MAC)
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221 // Use hard coded default on macOS, since selection of fixed width
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222 // default font is unreliable (see bug #59128).
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223 // Test for macOS default fixed width font
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224 if (fonts.contains (global_mono_font.def.toString ()))
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225 default_family = global_mono_font.def.toString ();
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226 #endif
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227
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228 // If default font is still empty (on all other platforms or
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229 // if macOS default font is not available): use QFontDatabase
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230 if (default_family.isEmpty ())
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231 {
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232 // Get the system's default monospaced font
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233 QFont fixed_font = QFontDatabase::systemFont (QFontDatabase::FixedFont);
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234 default_family = fixed_font.defaultFamily ();
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235
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236 // Since this might be unreliable, test all available fixed width fonts
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237 if (! fonts.contains (default_family))
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238 {
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239 // Font returned by QFontDatabase is not in fixed fonts list.
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240 // Fallback: take first from this list
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241 default_family = fonts[0];
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242 }
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243 }
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244
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245 // Test env variable which has preference
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246 std::string env_default_family = sys::env::getenv ("OCTAVE_DEFAULT_FONT");
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247 if (! env_default_family.empty ())
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248 default_family = QString::fromStdString (env_default_family);
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249
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250 return default_family;
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251 }
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252
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253 QStringList gui_settings::get_default_font (void)
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254 {
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255 QString default_family = get_default_font_family ();
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256
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257 // determine the fefault font size of the system
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258 // FIXME: QApplication::font () does not return the monospace font,
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259 // but the size should be probably near to the monospace font
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260 QFont font = QApplication::font ();
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261
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262 int font_size = font.pointSize ();
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263 if (font_size == -1)
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264 font_size = static_cast <int> (std::floor(font.pointSizeF ()));
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265
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266 // check for valid font size, otherwise take default 10
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267 QString default_font_size = "10";
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268 if (font_size > 0)
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269 default_font_size = QString::number (font_size);
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270
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271 std::string env_default_font_size
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272 = sys::env::getenv ("OCTAVE_DEFAULT_FONT_SIZE");
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273
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274 if (! env_default_font_size.empty ())
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275 default_font_size = QString::fromStdString (env_default_font_size);
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276
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277 QStringList result;
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278 result << default_family;
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279 result << default_font_size;
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280 return result;
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281 }
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282
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283 void gui_settings::reload (void)
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284 {
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285 // Declare some empty options, which may be set at first startup for
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286 // writing them into the newly created settings file
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287 QString custom_editor;
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288 QStringList def_font;
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289
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290 // Check whether the settings file does not yet exist
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291 if (! QFile::exists (file_name ()))
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292 {
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293 // Get the default font (for terminal)
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294 def_font = get_default_font ();
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295
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296 // Get a custom editor defined as env variable
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297 std::string env_default_editor
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298 = sys::env::getenv ("OCTAVE_DEFAULT_EDITOR");
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299
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300 if (! env_default_editor.empty ())
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301 custom_editor = QString::fromStdString (env_default_editor);
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302 }
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303
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304 check ();
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305
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306 // Write some settings that were dynamically determined at first startup
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307
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308 // Custom editor
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309 if (! custom_editor.isEmpty ())
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310 setValue (global_custom_editor.key, custom_editor);
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311
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312 // Default monospace font for the terminal
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313 if (def_font.count () > 1)
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314 {
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315 setValue (cs_font.key, def_font[0]);
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316 setValue (cs_font_size.key, def_font[1].toInt ());
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317 }
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318
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319 // Write the default monospace font into the settings for later use by
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320 // console and editor as fallbacks of their font preferences.
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321 setValue (global_mono_font.key, get_default_font_family ());
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322 }
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323
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324 void gui_settings::check (void)
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325 {
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326 if (status () == QSettings::NoError)
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327 {
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328 // Test usability (force file to be really created)
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329 setValue ("dummy", 0);
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330 sync ();
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331 }
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332
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333 if (! (QFile::exists (file_name ())
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334 && isWritable ()
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335 && status () == QSettings::NoError))
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336 {
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337 QString msg
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338 = QString (QT_TR_NOOP ("Error %1 creating the settings file\n%2\n"
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339 "Make sure you have read and write permissions to\n%3\n\n"
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340 "Octave GUI must be closed now."));
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341
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342 QMessageBox::critical (nullptr,
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343 QString (QT_TR_NOOP ("Octave Critical Error")),
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344 msg.arg (status ())
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345 .arg (file_name ())
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346 .arg (directory_name ()));
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347
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348 exit (1);
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349 }
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350 else
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351 remove ("dummy"); // Remove test entry
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352 }
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353
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354 OCTAVE_END_NAMESPACE(octave)