Signal

GtkPrintOperation::draw-page

Declaration

void
draw_page (
  GtkPrintOperation* self,
  GtkPrintContext* context,
  gint page_nr,
  gpointer user_data
)

Description [src]

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 gtk_print_context_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 gtk_print_operation_set_use_full_page() and gtk_print_operation_set_unit() before starting the print operation to set up the transformation of the cairo context according to your needs.

Default handler:

The default handler is called after the handlers added via g_signal_connect().

Parameters

context

Type: GtkPrintContext

The GtkPrintContext for the current operation.

The data is owned by the caller of the function.

page_nr

Type: gint

The number of the currently printed page (0-based).