Method refreshNodesLayout

bt_editor/mainwindow.cpp:1161–1195

void MainWindow::refreshNodesLayout(QtNodes::PortLayout new_layout)
{
    if( new_layout != _current_layout)
    {
        QString icon_name = ( new_layout == QtNodes::PortLayout::Horizontal ) ?
                                                                            ":/icons/BT-horizontal.png" :
                                                                            ":/icons/BT-vertical.png";
        QIcon icon;
        icon.addFile(icon_name, QSize(), QIcon::Normal, QIcon::Off);
        ui->toolButtonLayout->setIcon(icon);
        ui->toolButtonLayout->update();
    }

    bool refreshed = false;
    {
        const QSignalBlocker blocker( currentTabInfo() );
        for(auto& tab: _tab_info)
        {
            auto scene = tab.second->scene();
            if( scene->layout() != new_layout )
            {
                auto abstract_tree = BuildTreeFromScene( scene );
                scene->setLayout( new_layout );
                NodeReorder( *scene, abstract_tree );
                refreshed = true;
            }
        }
        on_toolButtonCenterView_pressed();
    }
    _current_layout = new_layout;
    if(refreshed)
    {
        onPushUndo();
    }
}

void MainWindow::refreshExpandedSubtrees()
{