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

#define GLADE_FILE "hello.glade"

void on_button1_clicked (GtkButton *button, GtkWidget *entry);

int
main (int argc, char *argv[])
{
    GladeXML        *gxml = NULL;
    GtkWidget       *window = NULL;
    GtkWidget       *entry = NULL;
   
    /* initialize GTK+ libraries */
    gtk_init (&argc, &argv);
   
    /* build from Glade XML file */
    gxml = glade_xml_new (GLADE_FILE, NULL, NULL);
    g_assert (gxml);
   
    /* get widgets from Glade XML file */
    window = glade_xml_get_widget (gxml, "window1");
    entry = glade_xml_get_widget (gxml, "entry1");
   
    /* call gtk_main_quit() when the window's "x" is clicked */
    glade_xml_signal_connect (gxml, "on_window1_destroy",
            G_CALLBACK (gtk_main_quit));
   
    /* call on_button1_clicked() when button1 is clicked, passing the text
    entry widget to the function as the user_data */
    glade_xml_signal_connect_data (gxml, "on_button1_clicked",
            G_CALLBACK (on_button1_clicked), entry);
   
    /* free Glade XML object */
    g_object_unref (G_OBJECT (gxml));
       
    /* begin GTK+ main loop */                   
    gtk_main ();

    return 0;
}

void
on_button1_clicked (GtkButton *button, GtkWidget *entry)
{
    /* set the entry's text */
    gtk_entry_set_text (GTK_ENTRY(entry), "Hello World!");
}