多选按钮(CheckButton)

#ifndef GTKMM_EXAMPLE_BUTTONS_H
#define GTKMM_EXAMPLE_BUTTONS_H

#include <gtkmm/window.h>
#include <gtkmm/checkbutton.h>

class ExampleWindow : public Gtk::Window
{
public:
  ExampleWindow();
  virtual ~ExampleWindow();

protected:
  //Signal handlers:
  void on_button_toggled();

  //Child widgets:
  Gtk::CheckButton m_button;
};

#endif //GTKMM_EXAMPLE_BUTTONS_H

#include "examplewindow.h"
#include <gtkmm/application.h>

int main(int argc, char *argv[])
{
  auto app = Gtk::Application::create("org.gtkmm.example");

  //Shows the window and returns when it is closed.
  return app->make_window_and_run<ExampleWindow>(argc, argv);
}

#include "examplewindow.h"
#include <iostream>

ExampleWindow::ExampleWindow()
: m_button("something")
{
  set_title("checkbutton example");

  m_button.signal_toggled().connect(sigc::mem_fun(*this,
              &ExampleWindow::on_button_toggled) );

  m_button.set_margin(10);
  set_child(m_button);
}

ExampleWindow::~ExampleWindow()
{
}

void ExampleWindow::on_button_toggled()
{
  std::cout << "The Button was toggled: state="
      << (m_button.get_active() ? "true" : "false")
      << std::endl;
}