#include <TGUI/TGUI.hpp>class MyFrame{public: MyFrame(sf::RenderWindow& w, tgui::Gui& g); void main();protected: tgui::ComboBox::Ptr m_choice; tgui::ListBoxRenderer m_listBoxRenderer; sf::RenderWindow& window; tgui::Gui& gui;};MyFrame::MyFrame(sf::RenderWindow& w, tgui::Gui& g) : window(w), gui(g){ m_listBoxRenderer.setBackgroundColor(tgui::Color(190, 190, 190)); m_listBoxRenderer.setBackgroundColorHover(tgui::Color::Yellow); auto m_Panel = tgui::Panel::create(); m_choice = tgui::ComboBox::create(); m_choice->getRenderer()->setListBox(m_listBoxRenderer.getData()); m_choice->addItem(L"1"); m_choice->addItem(L"2"); m_choice->addItem(L"3"); m_choice->setSelectedItemByIndex(0); m_Panel->add(m_choice); m_choice->setSize({ window.getSize().x / 2, window.getSize().y / 15 }); gui.add(m_Panel);}void MyFrame::main(){ while (window.isOpen()) { sf::Event event; while (window.pollEvent(event)) { if (event.type == sf::Event::Closed) window.close(); if (event.type == sf::Event::Resized) { m_choice->setSize({ window.getSize().x / 2, window.getSize().y / 15 }); } gui.handleEvent(event); } window.clear(); gui.draw(); window.display(); }}int main(){ sf::RenderWindow window(sf::VideoMode(800, 600), "MCVE"); window.setFramerateLimit(60); tgui::Gui gui(window); MyFrame(window, gui).main(); return EXIT_SUCCESS;}