#include <iostream>
#include <gtkmm/button.h>
#include <gtkmm.h>
#include <gtkmm/application.h>


class MyWindow : public Gtk::Window
{
    public:
        MyWindow(){
            loadCss();
            m_button = Gtk::Button("test");
            m_button.signal_clicked().connect(sigc::mem_fun(*this,&MyWindow::onButtonClicked));

            m_label = Gtk::Label("Hello!");
            m_label.get_style_context()->add_provider(css_provider,GTK_STYLE_PROVIDER_PRIORITY_USER+1);
            m_label.add_css_class("label");

            m_picture = Gtk::Picture("/usr/share/doc/gtkmm-4.0/reference/html/image1.png");
            m_picture.set_size_request(200,200);

            m_layout_grid = Gtk::Grid();
            m_layout_grid.get_style_context()->add_provider(css_provider,GTK_STYLE_PROVIDER_PRIORITY_USER+1);
            m_layout_grid.attach(m_button, 0, 0);
            m_layout_grid.attach(m_label, 1, 0);
            m_layout_grid.attach(m_picture, 0, 1);
            m_layout_grid.add_css_class("grid");

            set_child(m_layout_grid);
            set_size_request(800,600);
        }
        void onButtonClicked(){
            std::cout<<"hello world";
            std::flush(std::cout);
        }
        void loadCss(){
            css_provider = Gtk::CssProvider::create();
            css_provider->load_from_path("main.css");
        }
        Gtk::Picture m_picture;
        Gtk::Button m_button;
        Gtk::Label m_label;
        Gtk::Grid m_layout_grid;
        Glib::RefPtr<Gtk::CssProvider> css_provider;
};

int main(int argc, char **argv)
{
    auto app = Gtk::Application::create("org.gtkmm.example");
    return app->make_window_and_run<MyWindow>(argc, argv);
}