#include <stdlib.h>
#include <gtk/gtk.h>

static void destroy(GtkWidget*, gpointer);
static gboolean delete_event(GtkWidget*, GdkEvent*, gpointer);

int main (int argc, char *argv[])
{
    GtkWidget *window, *label;


    gtk_init(&argc, &argv);

    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

    gtk_window_set_title(GTK_WINDOW (window), "Hello World");
    gtk_container_set_border_width(GTK_CONTAINER (window), 10);
    gtk_widget_set_size_request(window, 200, 100);

    g_signal_connect(G_OBJECT(window), "destroy", G_CALLBACK(destroy), NULL);
    g_signal_connect(G_OBJECT(window), "delete_event", G_CALLBACK(delete_event), NULL); //i think events are before signals, so returning true blocks the signal itself

    label = gtk_label_new("hello world!");
    gtk_label_set_selectable(GTK_LABEL(label), TRUE);

    gtk_container_add(GTK_CONTAINER(window), label);

    gtk_widget_show_all(window);

    gtk_main();

    return 0;
}

static void destroy(GtkWidget *window, gpointer data)
{
    gtk_main_quit();
}

static gboolean delete_event(GtkWidget *window, GdkEvent *event, gpointer data)
{
    return FALSE;
}