CMake/Tests/FindGTK2/gtkmm/helloworld.cpp

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

HelloWorld::HelloWorld()
    : m_button("Hello World")   // creates a new button with label "Hello World".
{
    // Sets the border width of the window.
    set_border_width(10);

    // When the button receives the "clicked" signal, it will call the
    // on_button_clicked() method defined below.
    m_button.signal_clicked().connect(sigc::mem_fun(*this,
                                      &HelloWorld::on_button_clicked));

    // This packs the button into the Window (a container).
    add(m_button);

    // The final step is to display this newly created widget...
    m_button.show();
}

HelloWorld::~HelloWorld()
{
}

void HelloWorld::on_button_clicked()
{
    std::cout << "Hello World" << std::endl;
}