int PrintNotesNoteAddin::compute_footer_height(const Glib::RefPtr<Gtk::PrintContext> & context)
{
Glib::RefPtr<Pango::Layout> layout = create_layout_for_timestamp(context);
Pango::Rectangle ink_rect;
Pango::Rectangle logical_rect;
layout->get_extents(ink_rect, logical_rect);
return pango_units_to_double(ink_rect.get_height())
+ cm_to_pixel(0.5, context->get_dpi_y());
}
void PrintNotesNoteAddin::on_begin_print(const Glib::RefPtr<Gtk::PrintContext>& context)
{
m_timestamp_footer = create_layout_for_timestamp(context);
// Create and initialize the page margins
m_margin_top = cm_to_pixel (1.5, context->get_dpi_y());
m_margin_left = cm_to_pixel (1, context->get_dpi_x());
m_margin_right = cm_to_pixel (1, context->get_dpi_x());
m_margin_bottom = 0;
double max_height = pango_units_from_double(context->get_height()
- m_margin_top - m_margin_bottom
- compute_footer_height(context));
DBG_OUT("margins = %d %d %d %d", m_margin_top, m_margin_left,
m_margin_right, m_margin_bottom);
m_page_breaks.clear();
Gtk::TextIter position;
Gtk::TextIter end_iter;
get_buffer()->get_bounds (position, end_iter);
double page_height = 0;
bool done = position.compare (end_iter) >= 0;
while (!done) {
Gtk::TextIter line_end = position;
if (!line_end.ends_line ()) {
line_end.forward_to_line_end ();
}
int paragraph_number = position.get_line();
int indentation = 0;
Glib::RefPtr<Pango::Layout> layout = create_layout_for_paragraph(
context, position, line_end, indentation);
Pango::Rectangle ink_rect;
Pango::Rectangle logical_rect;
for(int line_in_paragraph = 0; line_in_paragraph < layout->get_line_count();
line_in_paragraph++) {
Glib::RefPtr<Pango::LayoutLine> line = layout->get_line(line_in_paragraph);
line->get_extents (ink_rect, logical_rect);
if ((page_height + logical_rect.get_height()) >= max_height) {
PageBreak(paragraph_number, line_in_paragraph);
m_page_breaks.push_back (PageBreak(paragraph_number, line_in_paragraph));
page_height = 0;
}
page_height += logical_rect.get_height();
}
position.forward_line ();
done = position.compare (end_iter) >= 0;
}
m_print_op->set_n_pages(m_page_breaks.size() + 1);
}