[pygi] add assistant demo

[John Palmieri <johnp src gnome org>]

commit a96dbafdf562a2ac6bde4df27919d3628689dbdb
Author: John (J5) Palmieri <johnp redhat com>
Date:   Fri Jun 4 17:48:24 2010 -0400

    add assistant demo

 demos/gtk-demo/demos/assistant.py |  134 +++++++++++++++++++++++++++++++++++++
 1 files changed, 134 insertions(+), 0 deletions(-)
---
diff --git a/demos/gtk-demo/demos/assistant.py b/demos/gtk-demo/demos/assistant.py
new file mode 100644
index 0000000..0fcf6b1
--- /dev/null
+++ b/demos/gtk-demo/demos/assistant.py
@@ -0,0 +1,134 @@
+#!/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 = "Assistant"
+description = """
+Demonstrates a sample multistep assistant. Assistants are used to divide
+an operation into several simpler sequential steps, and to guide the user
+through these steps.
+"""
+
+# See FIXME's
+is_fully_bound = True
+
+from gi.repository import Gtk, GdkPixbuf
+
+class AssistantApp:
+    def __init__(self):
+        self.assistant = Gtk.Assistant()
+        self.assistant.set_default_size(-1, 300)
+ 
+        self.create_page1()
+        self.create_page2()
+        self.create_page3()
+
+        self.assistant.connect('cancel', self.on_close_cancel)
+        self.assistant.connect('close', self.on_close_cancel)
+        self.assistant.connect('apply', self.on_apply)
+        self.assistant.connect('prepare', self.on_prepare)
+        
+        self.assistant.show()
+
+    def on_close_cancel(self, assistant):
+        assistant.destroy()
+        Gtk.main_quit()
+
+    def on_apply(self, assistant):
+        # apply changes here; this is a fictional example so just do
+        # nothing here
+        pass
+
+    def on_prepare(self, assistant, page):
+        current_page = assistant.get_current_page()
+        n_pages = assistant.get_n_pages()
+        title = 'Sample assistant (%d of %d)' % (current_page + 1, n_pages)
+        assistant.set_title(title)
+
+    def on_entry_changed(self, widget):
+        page_number = self.assistant.get_current_page()
+        current_page = self.assistant.get_nth_page(page_number)
+        text = widget.get_text()
+        
+        if text:
+            self.assistant.set_page_complete(current_page, True)
+        else:
+            self.assistant.set_page_complete(current_page, False)
+
+    def create_page1(self):
+        box = Gtk.HBox(homogeneous=False,
+                       spacing=12)
+        box.set_border_width(12)
+        label = Gtk.Label(label='You must fill out this entry to continue:')
+        box.pack_start(label, False, False, 0)
+         
+        entry = Gtk.Entry()
+        box.pack_start(entry, True, True, 0)
+        entry.connect('changed', self.on_entry_changed)
+
+        box.show_all()
+        self.assistant.append_page(box)
+        self.assistant.set_page_title(box, 'Page 1')
+        self.assistant.set_page_type(box, Gtk.AssistantPageType.INTRO)
+
+        pixbuf = self.assistant.render_icon(Gtk.STOCK_DIALOG_INFO,
+                                            Gtk.IconSize.DIALOG, 
+                                            None)
+
+        self.assistant.set_page_header_image(box, pixbuf)
+
+    def create_page2(self):
+        box = Gtk.VBox(homogeneous=False,
+                       spacing=12)
+        box.set_border_width(12)
+        
+        checkbutton = Gtk.CheckButton(label='This is optional data, you may continue even if you do not check this')
+        box.pack_start(checkbutton, False, False, 0)
+
+        box.show_all()
+
+        self.assistant.append_page(box)
+        self.assistant.set_page_complete(box, True)        
+        self.assistant.set_page_title(box, 'Page 2')
+        
+        pixbuf = self.assistant.render_icon(Gtk.STOCK_DIALOG_INFO,
+                                            Gtk.IconSize.DIALOG, 
+                                            None)
+        self.assistant.set_page_header_image(box, pixbuf)
+
+    def create_page3(self):
+        label = Gtk.Label(label='This is a confirmation page, press "Apply" to apply changes')
+        label.show()
+        self.assistant.append_page(label)
+        self.assistant.set_page_complete(label, True)        
+        self.assistant.set_page_title(label, 'Confirmation')
+        self.assistant.set_page_type(label, Gtk.AssistantPageType.CONFIRM)
+
+        pixbuf = self.assistant.render_icon(Gtk.STOCK_DIALOG_INFO,
+                                            Gtk.IconSize.DIALOG, 
+                                            None)
+        self.assistant.set_page_header_image(label, pixbuf)
+
+def main():
+    app = AssistantApp()
+    Gtk.main()
+
+if __name__ == '__main__':
+    main()