Extender el diálogo de impresión

You may add a custom tab to the print dialog:

  • Set the title of the tab via PrintOperation::set_custom_tab_label(), create a new widget and return it from the create_custom_widget signal handler. You'll probably want this to be a container widget, packed with some others.
  • Get the data from the widgets in the custom_widget_apply signal handler.

Although the custom_widget_apply signal provides the widget you previously created, to simplify things you can keep the widgets you expect to contain some user input as class members. For example, let's say you have a Gtk::Entry called m_Entry as a member of your CustomPrintOperation class:

Gtk::Widget* CustomPrintOperation::on_create_custom_widget()
{
  set_custom_tab_label("My custom tab");

  auto hbox = new Gtk::Box(Gtk::Orientation::HORIZONTAL, 8);
  hbox->set_margin(6);

  auto label = Gtk::make_managed<Gtk::Label>("Enter some text: ");
  hbox->add(*label);

  hbox->add(m_Entry);

  return hbox;
}

void CustomPrintOperation::on_custom_widget_apply(Gtk::Widget* /* widget */)
{
  auto user_input = m_Entry.get_text();
  //...
}

El ejemplo en examples/book/printing/advanced demuestra esto.