editor: SaleInvoicePrinterDialog
GtkDialog(main_dialog.toplevel): title='Sale Invoice Dialog', hidden
  GtkVBox(main_dialog._main_vbox):
    GtkVBox(main_dialog.vbox, expand=True, fill=True):
      GtkEventBox(main_dialog.header):
      GtkEventBox(main_dialog.main, expand=True, fill=True, padding=6): slave SaleInvoicePrinterDialog is attached
        GtkHBox(toplevel):
          GtkLabel(label1, expand=True, fill=True): '<b>Invoice Number:</b>'
          ProxySpinButton(invoice_number): '1004'
      GtkHBox(fill=True):
        GtkEventBox(main_dialog.extra_holder, expand=True, fill=True, padding=6):
        GtkEventBox(main_dialog.print_holder, expand=True, fill=True):
        GtkEventBox(main_dialog.notice, fill=True):
        GtkEventBox(main_dialog.details_holder, padding=6, pack-end):
    GtkHButtonBox(fill=True, pack-end):
      GtkButton(main_dialog.cancel_button, expand=True, fill=True, padding=6): 'gtk-cancel'
      GtkButton(main_dialog.ok_button, expand=True, fill=True, padding=6): 'gtk-print'
