main.c

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

static void
main_app_close_cb (GtkWidget *app, gpointer user_data)
{
    gtk_widget_destroy (app);
}

static void
activate_cb (GtkApplication *app, gpointer data)
{
    GtkBuilder *builder;
    GObject *main_app_window;
    GObject *main_grid;
    GError *err;

    err = NULL;
    builder = gtk_builder_new ();
    gtk_builder_add_from_file (builder, "src/builder.ui", &err);

    if (err)
    {
        g_print ("ERROR: main.c/activate_cb ()/line 22: GError == %s\n",
                 err->message);
        g_error_free (err);
    }

    main_app_window = gtk_builder_get_object (builder, "main-window");
    gtk_builder_add_callback_symbol (builder,
                                     "main-app-close-cb",
                                     G_CALLBACK (main_app_close_cb));
    /*
    g_signal_connect (main_app_window,
                      "destroy",
                      G_CALLBACK (main_app_close_cb),
                      NULL);*/
}

gint
main (gint argc, gchar **argv)
{
    GtkApplication *app;
    gint status;

    app = gtk_application_new ("com.gitlab.dsreyes1014.gW2C",
                               G_APPLICATION_FLAGS_NONE);

    g_signal_connect (app, "activate", G_CALLBACK (activate_cb), NULL);
    status = g_application_run (G_APPLICATION (app), argc, argv);
    g_object_unref (app);

    return status;
}