draw_page
Description:
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].
```c 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:
context |
the `GtkPrintContext` for the current operation |
page_nr |
the number of the currently printed page (0-based) |