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#!/usr/bin/env python
# -*- Mode: Python; py-indent-offset: 4 -*-
# vim: tabstop=4 shiftwidth=4 expandtab
#
# Copyright (C) 2010 Red Hat, Inc., John (J5) Palmieri <johnp@redhat.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
# USA
title = "Printing"
description = """
GtkPrintOperation offers a simple API to support printing in a cross-platform way.
"""
from gi.repository import Gtk, GLib, Pango, PangoCairo
import math
import os
class PrintingApp:
HEADER_HEIGHT = 10 * 72 / 25.4
HEADER_GAP = 3 * 72 / 25.4
def __init__(self):
self.operation = Gtk.PrintOperation()
print_data = {'filename': os.path.abspath(__file__),
'font_size': 12.0,
'lines_per_page': 0,
'lines': None,
'num_lines': 0,
'num_pages': 0
}
self.operation.connect('begin-print', self.begin_print, print_data)
self.operation.connect('draw-page', self.draw_page, print_data)
self.operation.connect('end-print', self.end_print, print_data)
self.operation.set_use_full_page(False)
self.operation.set_unit(Gtk.Unit.POINTS)
self.operation.set_embed_page_setup(True)
settings = Gtk.PrintSettings()
dir = GLib.get_user_special_dir(GLib.UserDirectory.DIRECTORY_DOCUMENTS)
if dir is None:
dir = GLib.get_home_dir()
if settings.get(Gtk.PRINT_SETTINGS_OUTPUT_FILE_FORMAT) == 'ps':
ext = '.ps'
elif settings.get(Gtk.PRINT_SETTINGS_OUTPUT_FILE_FORMAT) == 'svg':
ext = '.svg'
else:
ext = '.pdf'
uri = "file://%s/gtk-demo%s" % (dir, ext)
settings.set(Gtk.PRINT_SETTINGS_OUTPUT_URI, uri)
self.operation.set_print_settings(settings)
def run(self, parent=None):
result = self.operation.run(Gtk.PrintOperationAction.PRINT_DIALOG, parent)
if result == Gtk.PrintOperationResult.ERROR:
message = self.operation.get_error()
dialog = Gtk.MessageDialog(parent,
0,
Gtk.MessageType.ERROR,
Gtk.ButtonsType.CLOSE,
message)
dialog.run()
dialog.destroy()
Gtk.main_quit()
def begin_print(self, operation, print_ctx, print_data):
height = print_ctx.get_height() - self.HEADER_HEIGHT - self.HEADER_GAP
print_data['lines_per_page'] = \
math.floor(height / print_data['font_size'])
file_path = print_data['filename']
if not os.path.isfile(file_path):
file_path = os.path.join('demos', file_path)
if not os.path.isfile:
raise Exception("file not found: " % (file_path, ))
# in reality you should most likely not read the entire
# file into a buffer
source_file = open(file_path, 'r')
s = source_file.read()
print_data['lines'] = s.split('\n')
print_data['num_lines'] = len(print_data['lines'])
print_data['num_pages'] = \
(print_data['num_lines'] - 1) / print_data['lines_per_page'] + 1
operation.set_n_pages(print_data['num_pages'])
def draw_page(self, operation, print_ctx, page_num, print_data):
cr = print_ctx.get_cairo_context()
width = print_ctx.get_width()
cr.rectangle(0, 0, width, self.HEADER_HEIGHT)
cr.set_source_rgb(0.8, 0.8, 0.8)
cr.fill_preserve()
cr.set_source_rgb(0, 0, 0)
cr.set_line_width(1)
cr.stroke()
layout = print_ctx.create_pango_layout()
desc = Pango.FontDescription('sans 14')
layout.set_font_description(desc)
layout.set_text(print_data['filename'], -1)
(text_width, text_height) = layout.get_pixel_size()
if text_width > width:
layout.set_width(width)
layout.set_ellipsize(Pango.EllipsizeMode.START)
(text_width, text_height) = layout.get_pixel_size()
cr.move_to((width - text_width) / 2,
(self.HEADER_HEIGHT - text_height) / 2)
PangoCairo.show_layout(cr, layout)
page_str = "%d/%d" % (page_num + 1, print_data['num_pages'])
layout.set_text(page_str, -1)
layout.set_width(-1)
(text_width, text_height) = layout.get_pixel_size()
cr.move_to(width - text_width - 4,
(self.HEADER_HEIGHT - text_height) / 2)
PangoCairo.show_layout(cr, layout)
layout = print_ctx.create_pango_layout()
desc = Pango.FontDescription('monospace')
desc.set_size(print_data['font_size'] * Pango.SCALE)
layout.set_font_description(desc)
cr.move_to(0, self.HEADER_HEIGHT + self.HEADER_GAP)
lines_pp = int(print_data['lines_per_page'])
num_lines = print_data['num_lines']
data_lines = print_data['lines']
font_size = print_data['font_size']
line = page_num * lines_pp
for i in range(lines_pp):
if line >= num_lines:
break
layout.set_text(data_lines[line], -1)
PangoCairo.show_layout(cr, layout)
cr.rel_move_to(0, font_size)
line += 1
def end_print(self, operation, print_ctx, print_data):
pass
def main(demoapp=None):
app = PrintingApp()
GLib.idle_add(app.run, demoapp.window)
Gtk.main()
if __name__ == '__main__':
main()
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