Method startDemo

app/src/Misc/DemoLauncher.cpp:64–109

* @brief Stage a writable copy, open it under a demo session (never persisted as the last * project), gate the Pro 3D group, then connect so the simulation runs. A failed load * restores the prior mode and session; when the demo is already loaded it re-arms the * session, re-applies mode and gating, and reconnects instead of re-staging. */

 *        session, re-applies mode and gating, and reconnects instead of re-staging.
 */
bool Misc::DemoLauncher::startDemo()
{
  auto& state = AppState::instance();
  if (state.ephemeralSession())
    return false;

  auto& io          = IO::ConnectionManager::instance();
  const auto& model = DataModel::ProjectModel::instance();

  if (model.jsonFilePath() == demoProjectPath()) {
    state.setDemoSession(demoDirectory());
    state.setOperationMode(SerialStudio::ProjectFile);
    applyProGating();

    if (io.isConnected())
      io.disconnectDevice();

    io.connectDevice();
    return true;
  }

  QString projectPath;
  if (!stageDemoProject(projectPath)) {
    showStartFailure();
    return false;
  }

  const auto previousMode = state.operationMode();
  state.setDemoSession(demoDirectory());

  if (!DataModel::ProjectModel::instance().openJsonFile(projectPath)) {
    state.setDemoSession(QString());
    state.setOperationMode(previousMode);
    qWarning() << "[Demo] Failed to open staged demo project:" << projectPath;
    showStartFailure();
    return false;
  }

  applyProGating();

  if (io.isConnected())
    io.disconnectDevice();

  io.connectDevice();
  return true;
}

//--------------------------------------------------------------------------------------------------
// Private helpers