--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/requirements.txt	Sun Jun 15 11:58:49 2014 +0200
@@ -0,0 +1,5 @@
+hatta
+werkzeug
+pygments
+mercurial
+jinja2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/slides.py	Sun Jun 15 11:58:49 2014 +0200
@@ -0,0 +1,65 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+An example of extending Hatta: adding a slideshow functionality.
+"""
+
+import os.path
+import webbrowser
+
+import werkzeug
+
+import hatta.wiki
+import hatta.page
+import hatta.views
+
+
+class WikiPageWiki(hatta.page.WikiPageWiki):
+    def footer(self, special_title, edit_url):
+        _ = self.wiki.gettext
+        for part in super(WikiPageWiki, self).footer(special_title, edit_url):
+            yield part
+        yield werkzeug.html.a(werkzeug.html(_('Slides')),
+            href=self.get_url(self.title, 'slides'),
+            class_='slides')
+        yield u'\n'
+
+
+@hatta.views.URL('/+slides/<title:title>')
+def slides(request, title):
+    """Dump the HTML content of the pages listed."""
+
+    items = request.wiki.index.page_links_and_labels(title)
+    contents = []
+    for t, label in items:
+        page = hatta.page.get_page(request, t)
+        try:
+            html = ''.join(page.view_content())
+        except hatta.error.NotFoundErr:
+            continue
+        slide_title = (u'<h1>%s</h1>' % werkzeug.escape(label))
+        contents.append(slide_title + html)
+    content = ('<div class="slide">%s</div>'
+               % '</div><div class="slide">'.join(contents))
+    html = """<!DOCTYPE html>
+<link type="text/css" href="../+download/slides.css" rel="stylesheet">
+<link type="text/css" href="../+download/pygments.css" rel="stylesheet">
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>%s</title>
+%s
+<script src="../+download/jquery.js"></script>
+<script src="../+download/slides.js"></script>
+""" % (werkzeug.escape(title), content)
+    response = hatta.WikiResponse(html, mimetype='text/html')
+    return response
+
+
+if __name__=='__main__':
+    config = hatta.WikiConfig(
+        pages_path=os.path.dirname(os.path.abspath(__file__)),
+    )
+    wiki = hatta.wiki.Wiki(config)
+    wiki.mime_map['text/x-wiki'] = WikiPageWiki
+    webbrowser.open_new('http://127.0.0.1:8080/')
+    hatta.main(wiki=wiki)