onDrawPage

fun onDrawPage(    connectFlags: <Error class: unknown class> = ConnectFlags(0u),     handler: (context: PrintContext, <Error class: unknown class>) -> Unit): <Error class: unknown class>

Emitted for every page that is printed.

The signal handler must render the @page_nr's page onto the cairo context obtained from @context using method@Gtk.PrintContext.get_cairo_context.

static void
draw_page (GtkPrintOperation *operation,
           GtkPrintContext   *context,
           int                page_nr,
           gpointer           user_data)
{
  cairo_t *cr;
  PangoLayout *layout;
  double width, text_height;
  int layout_height;
  PangoFontDescription *desc;

  cr = gtk_print_context_get_cairo_context (context);
  width = gtk_print_context_get_width (context);

  cairo_rectangle (cr, 0, 0, width, HEADER_HEIGHT);

  cairo_set_source_rgb (cr, 0.8, 0.8, 0.8);
  cairo_fill (cr);

  layout = gtk_print_context_create_pango_layout (context);

  desc = pango_font_description_from_string ("sans 14");
  pango_layout_set_font_description (layout, desc);
  pango_font_description_free (desc);

  pango_layout_set_text (layout, "some text", -1);
  pango_layout_set_width (layout, width * PANGO_SCALE);
  pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);

  pango_layout_get_size (layout, NULL, &layout_height);
  text_height = (double)layout_height / PANGO_SCALE;

  cairo_move_to (cr, width / 2,  (HEADER_HEIGHT - text_height) / 2);
  pango_cairo_show_layout (cr, layout);

  g_object_unref (layout);
}

Use method@Gtk.PrintOperation.set_use_full_page and method@Gtk.PrintOperation.set_unit before starting the print operation to set up the transformation of the cairo context according to your needs.

Parameters

connectFlags

a combination of ConnectFlags

handler

the Callback to connect. Params: context the GtkPrintContext for the current operation; pageNr the number of the currently printed page (0-based)