Shadow for GtkLabel

GtkLabel_shadow.c

static gboolean label_exposed(GtkWidget *widget, GdkEventExpose *event, gpointer userdata)
{
    double width = 4.0;
    int offset_x = 2;
    int offset_y = 2;
    cairo_t *cr = gdk_cairo_create(widget->window);
    gint x = widget->allocation.x;
    gint y = widget->allocation.y;

    PangoLayout *layout = gtk_label_get_layout(GTK_LABEL(widget));
    if PANGO_IS_LAYOUT(layout) {
        cairo_move_to (cr, x+offset_x, y+offset_y);
        cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 1.0);
        cairo_set_line_width (cr, width);
        pango_cairo_layout_path (cr, layout);
        cairo_stroke (cr);

        cairo_move_to (cr, x, y);
        cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 1.0);
        pango_cairo_show_layout(cr, layout);

        cairo_destroy(cr);
    }
    return TRUE;
}