CheckButton
| Chapter 6. Buttons |

## CheckButton

`Gtk::CheckButton` inherits directly from `Gtk::Widget`. It is similar to `Gtk::ToggleButton`. The only real difference between the two is `Gtk::CheckButton`'s appearance. You can check and set a check button using the same member methods as for `Gtk::ToggleButton`.

Reference

### Example

Figure 6.2. CheckButton

Source Code

File: `examplewindow.h` (For use with gtkmm 4)

    #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

File: `examplewindow.cc` (For use with gtkmm 4)

    #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;
    }

File: `main.cc` (For use with gtkmm 4)

    #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);
    }

ToggleButton |  | Radio Button