Method setTheme

app/src/Misc/ThemeManager.cpp:276–336

* @brief Sets the current theme to the theme at the specified index. */

 * @brief Sets the current theme to the theme at the specified index.
 */
void Misc::ThemeManager::setTheme(const int index)
{
  int filteredIndex = index;
  if (index < 0 || index >= m_availableThemes.count())
    filteredIndex = 0;

  m_theme     = filteredIndex;
  m_themeName = m_availableThemes.at(filteredIndex);
  if (m_persistSettings)
    m_settings.setValue("ApplicationThemeName", m_themeName);

  if (m_themeName == QStringLiteral("System")) {
    loadSystemTheme();
    return;
  }

  m_applyingTheme = true;

  auto data      = m_themes.value(m_themeName);
  m_colors       = jsonObjectToVariantMap(data.value("colors").toObject());
  m_widgetColors = extractWidgetColors(data.value("colors").toObject());
  m_deviceColors = extractDeviceColors(data.value("colors").toObject());
  m_parameters   = jsonObjectToVariantMap(data.value("parameters").toObject());

  m_palette.setColor(QPalette::Mid, getColor("mid"));
  m_palette.setColor(QPalette::Dark, getColor("dark"));
  m_palette.setColor(QPalette::Text, getColor("text"));
  m_palette.setColor(QPalette::Base, getColor("base"));
  m_palette.setColor(QPalette::Link, getColor("link"));
  m_palette.setColor(QPalette::Light, getColor("light"));
  m_palette.setColor(QPalette::Window, getColor("window"));
  m_palette.setColor(QPalette::Shadow, getColor("shadow"));
  m_palette.setColor(QPalette::Accent, getColor("accent"));
  m_palette.setColor(QPalette::Button, getColor("button"));
  m_palette.setColor(QPalette::Midlight, getColor("midlight"));
  m_palette.setColor(QPalette::Highlight, getColor("highlight"));
  m_palette.setColor(QPalette::WindowText, getColor("window_text"));
  m_palette.setColor(QPalette::BrightText, getColor("bright_text"));
  m_palette.setColor(QPalette::ButtonText, getColor("button_text"));
  m_palette.setColor(QPalette::ToolTipBase, getColor("tooltip_base"));
  m_palette.setColor(QPalette::ToolTipText, getColor("tooltip_text"));
  m_palette.setColor(QPalette::LinkVisited, getColor("link_visited"));
  m_palette.setColor(QPalette::AlternateBase, getColor("alternate_base"));
  m_palette.setColor(QPalette::PlaceholderText, getColor("placeholder_text"));
  m_palette.setColor(QPalette::HighlightedText, getColor("highlighted_text"));

  Q_EMIT themeChanged();

  const auto palette = m_palette;
  const auto bg      = getColor(QStringLiteral("base"));
  const auto fg      = getColor(QStringLiteral("text"));
  QTimer::singleShot(0, this, [this, palette, bg, fg]() {
    qApp->setPalette(palette);
    if (fg.lightness() > bg.lightness())
      qApp->styleHints()->setColorScheme(Qt::ColorScheme::Dark);
    else
      qApp->styleHints()->setColorScheme(Qt::ColorScheme::Light);