#include <gtk/gtk.h>
#include <gdk/gdkx.h>

// cc -Wall example1-gtk.c -o example1-gtk `pkg-config --cflags gtk+-2.0` `pkg-config --libs gtk+-2.0`

static void button_clicked (GtkWidget * widget, gpointer data)
{
    g_print("Button was clicked!\n");
}

static gboolean delete_event (GtkWidget * widget, GdkEvent * event, gpointer data)
{
    g_print("Delete event occurred\n");
    return FALSE;
}

static void destroy (GtkWidget * widget, gpointer data)
{
    g_print("Destroy signal was sent\n");
    gtk_main_quit();
}

int main(int argc, char ** argv)
{
    GtkWidget * window;
    GtkWidget * button;
    const gchar * title = "Hello World!";
    gtk_init (&argc, &argv);
    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title (GTK_WINDOW (window), title);
    gtk_container_set_border_width (GTK_CONTAINER (window), 25);
    g_signal_connect (G_OBJECT(window), "delete_event", G_CALLBACK (delete_event), NULL);
    g_signal_connect (G_OBJECT (window), "destroy", G_CALLBACK (destroy), NULL);
    button = gtk_button_new_with_label ("Quit");
    g_signal_connect (G_OBJECT (button), "clicked", G_CALLBACK (button_clicked), NULL);
    g_signal_connect_swapped (G_OBJECT (button), "clicked", G_CALLBACK (gtk_widget_destroy), G_OBJECT (window));
    gtk_container_add (GTK_CONTAINER (window), button);
    gdk_window_set_decorations (GTK_WIDGET(window)->window, GDK_DECOR_BORDER | GDK_DECOR_TITLE);
    gtk_widget_show (button);
    gtk_widget_show (window);
    gtk_main();
    return 0;
}