#include <gtk/gtk.h>

GtkWidget *scrolled_window;

void addTimer(GtkWidget *widget, gpointer data)
{
    GObject *mainBox;
    GtkWidget *timer;
    GtkWidget *btn;
    timer = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 3);

    btn = gtk_button_new_with_label("gtk_box_pack");

    gtk_container_add (GTK_CONTAINER (scrolled_window), (GtkWidget *)data);

    gtk_box_pack_start((GtkBox *)data, btn, TRUE, TRUE, 3);
    gtk_widget_show(btn);

    g_print("New thing should be added...\n");
}

int main(int argc, char **argv)
{
    GtkBuilder *builder;
    GtkWidget *window;
    GObject *button;
    GtkWidget *mainBox;
    GtkWidget *header;
    GtkWidget *btn;
    GError *error = NULL;

    gtk_init(&argc, &argv);

    // add header:
    header = gtk_header_bar_new();
    gtk_header_bar_set_title(GTK_HEADER_BAR(header), "Timers");

    /* Construct a GtkBuilder instance and load our UI description */
    builder = gtk_builder_new();

    if (gtk_builder_add_from_file(builder, "timers.glade", &error) == 0)
    {
        g_printerr("Error loading file: %s\n", error->message);
        g_clear_error(&error);
        return 1;
    }

    btn = gtk_button_new_with_label("+ New Timer");

    window = (GtkWidget *)gtk_builder_get_object(builder, "window");

    scrolled_window = gtk_scrolled_window_new(NULL, NULL);

    gtk_container_set_border_width (GTK_CONTAINER (scrolled_window), 10);

    mainBox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 5);

    /* And add it to the scrolled window */
    gtk_container_add (GTK_CONTAINER (scrolled_window), mainBox);

    gtk_header_bar_pack_start(GTK_HEADER_BAR(header), btn);

    gtk_window_set_titlebar (GTK_WINDOW(window), header);

    //gtk_box_pack_start((GtkBox *)mainBox, header, FALSE, TRUE, 3);

    gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_window),
                                  GTK_POLICY_AUTOMATIC,
                                  GTK_POLICY_AUTOMATIC);

    gtk_container_add(GTK_CONTAINER(window), scrolled_window);

    g_signal_connect(window, "destroy", G_CALLBACK (gtk_main_quit), NULL);

    gtk_widget_show_all(window);

    g_signal_connect(btn, "clicked", G_CALLBACK(addTimer), mainBox);

    gtk_main();

    return 0;
}