From 3c79d94ac2125512416e7cdfe41f7afe42531b2f Mon Sep 17 00:00:00 2001 From: David Soulayrol Date: Tue, 16 Nov 2010 16:05:36 +0100 Subject: [PATCH] Initial commit. --- COPYING | 674 ++++++++++++++++++++++++++++++++++++++++++++++++++++ MANIFEST.in | 1 + README | 18 ++ setup.py | 29 +++ wizpym.py | 424 +++++++++++++++++++++++++++++++++ 5 files changed, 1146 insertions(+) create mode 100644 COPYING create mode 100644 MANIFEST.in create mode 100644 README create mode 100755 setup.py create mode 100644 wizpym.py diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/COPYING @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/MANIFEST.in b/MANIFEST.in new file mode 100644 index 0000000..eb762f3 --- /dev/null +++ b/MANIFEST.in @@ -0,0 +1 @@ +include COPYING diff --git a/README b/README new file mode 100644 index 0000000..591dcd5 --- /dev/null +++ b/README @@ -0,0 +1,18 @@ +The wizpym module provides a light framework to build wizard-like +applications with GTK. + +A wizard, as defined by wizpym, is an application that is built as a +succession of panes, each one asking some input to the user or working +on previous inputs. The whole wizard works on one object, called the +subject, which is shared and updated by each one of the panes. + +The pane track can fork upon some inputs or any other environment +data. The wizard also maintains a full history of the track, with the +status of reverted panes. Thus the user can return down to the +beginning, and forwarding preserves the previous status of a pane if +already visited. + +A sample useless application is provided and is executed if the module +is called as a script. + +See diff --git a/setup.py b/setup.py new file mode 100755 index 0000000..35086f6 --- /dev/null +++ b/setup.py @@ -0,0 +1,29 @@ +#!/usr/bin/env python + +import os +import wizpym +from distutils.core import setup + +def read(fname): + return open(os.path.join(os.path.dirname(__file__), fname)).read() + +setup(name='wizpym', + version=wizpym.__version__, + description='A tool to write Wizard-like apps', + long_description=read('README'), + author='David Soulayrol', + author_email='david.soulayrol@gmail.com', + url='http://david.soulayrol.name/projects/wizpym', + requires=['gobject(>=2.4)', 'gtk(>=2.4)'], + classifiers=[ + 'Development Status :: 4 - Beta', + 'Environment :: X11 Applications :: GTK', + 'Intended Audience :: Developers', + 'License :: OSI Approved :: GNU General Public License (GPL)', + 'Operating System :: POSIX', + 'Programming Language :: Python', + 'Topic :: Software Development :: Libraries :: Python Modules', + 'Topic :: Software Development :: User Interfaces', + ], + py_modules=['wizpym'], + ) diff --git a/wizpym.py b/wizpym.py new file mode 100644 index 0000000..1af7ce9 --- /dev/null +++ b/wizpym.py @@ -0,0 +1,424 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- +# +# wizpym - The Wyzard Python Module, a tool to write Wizard-like apps. +# Copyright (C) 2010 David Soulayrol +# +# wizpym is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program 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 General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, see . + +# Requires Python 2.6 for with statements. +# Requires Python 2.5 for etree in test panes. + +"""A tool to write Wizard-like apps. + +This module provides classes to easily build wizard-type applications +with GTK. This kind of application is composed of a succession of +panes which asks the user for inputs, and processes them to achieve +some result. It is a quite natural way to propose a graphical view for +short and simple tasks, or batch processes. + +Wizard applications thus are successions of short tasks which +cooperate to work on some subject, each one adding a value or choosing +the next step in the whole process. wizpym provides a framework for +the developers to focus on these tasks by providing the tools to plug +them together and to handle background activities. +""" + +import gobject +import gtk +import threading + +__all__ = ['InvalidPane', 'Pane', 'ActivePane', 'Frame'] +__version_info__ = (0, 1, 0) +__version__ = '.'.join((str(i) for i in __version_info__)) + + +class InvalidPane(Exception): + """Raised when a wrong argument is given in pane manipulating methods.""" + pass + + +class Pane(gtk.VBox): + """A single pane from a Wizard. + + Each pane of a wizard has zero or one predecessor and one or many + successors. The successor is chosen upon an switch, which can be + altered when the user interacts with the pane. + + All panes from one wizard share a subject. The subject is the + object that forwards data from one pane to the other and can be a + simple string as well as a complex structure. It is initially set + by the wizard Frame when the first pane is created. + """ + + def __init__(self, frame): + """Constructor. + + A fresh pane has no successors nor predecessor. The + constructor doesn't either set the subject: the wizard frame + takes care of setting it, and passing it from one pane to the + other. + + Note that all wizard panes constructors should take no + parameter since they are called automatically by the wizard + frame. The developer should consider using the wizard subject + or environment variables to configure the panes if necessary. + """ + gtk.VBox.__init__(self, False, 5) + + self._frame = frame + self._subject = None + self._switch = None + self._successors = {} + + def link_to(self, klass): + """Add a successor to this pane. + + This method is intended to be called by the pane itself at + construction time to set its successors, but nothing forbids + to do it a different way. + + The switch is set to the first successor set. If the provided + pane is already a successor of this pane, the InvalidPane + exception is raised. + """ + if klass is None or klass in self._successors: + raise InvalidPane() + self._successors[klass] = klass(self._frame) + if len(self._successors) == 1: + self._switch = klass + + def switch(self, klass): + """Update the switch using the given class. + + If the provided class is None or is not a successor of this + pane, the InvalidPane exception is raised. + """ + if klass is None or klass in [o.__class__ for o in self._successors]: + raise InvalidPane() + self._switch = klass + + def is_terminal(self): + """Whether this pane has no successor.""" + return len(self._successors) == 0 + + def enter(self): + """Proceed to this pane initialization. + + This method is called by the wizard main frame when this pane + is entered or reentered from its predecessor. It should be + overriden if this pane needs to update itself with the received + subject. + """ + pass + + def leave(self): + """Proceed to this pane finalization. + + This method is called when this pane is replaced by a + successor. It should be overriden if this pane needs to + compute or to retrieve some data to update the subject before + it is passed to the successor. + """ + pass + + def next(self): + """Return the next pane as designated by the switch.""" + return self._successors.get(self._switch) + + def _get_subject(self): + return self._subject + + def _set_subject(self, s): + self._subject = s + + subject = property(_get_subject, _set_subject, None, 'This pane subject') + + +class ActivePane(Pane): + """An active pane from a Wizard. + + ActivePane specializes the Pane class by providing a mean of + running long tasks in the background. Applications using this kind + of Pane should not forget to call gobject.threads_init before + anything else. + """ + + def __init__(self, frame): + """Constructor.""" + Pane.__init__(self, frame) + + self._thread = None + + def enter(self): + """Proceed to this pane initialization. + + See Pane.enter. All ActivePane instances that override this + method should call thir parent one, since the background task + start is handled here. + """ + self._thread = threading.Thread( + name=self.__class__.__name__, target=self._wrapper) + self._thread.start() + + def is_running(self): + """Whether this pane background task is running.""" + return not self._thread is None and self._thread.is_alive() + + def _runner(self): + """The background task. + + All ActivePane instances should override this method to put + their behaviour. It is up to the developer to handle + synchronisation problems. Note in particular that all pane + drawing invoked from there should be done through some helper + like gobject.idle_add. + """ + pass + + def _wrapper(self): + """A internal wrapper around the pane task.""" + gobject.idle_add(self._frame.lock) + self._runner() + gobject.idle_add(self._frame.unlock) + + +class Frame(gtk.Dialog): + """The Wizard window. + + Each wizard application is built around exactly one Frame + instance. The frame is responsible to show the panes and to + forward the subject between them. + """ + + def __init__(self, start_klass, subject="", title='Wizard', min_size=(400, 200)): + """Constructor. + + A frame must be provided at least the initial pane class. If + no subject is set, then a (initially empty) string is provided + to the first pane. + """ + gtk.Dialog.__init__(self, title) + + start_pane = start_klass(self) + start_pane.subject = subject + self._track = [start_pane] + + self._prev_button = gtk.Button('Previous') + self._prev_button.set_sensitive(False) + self._next_button = gtk.Button('Next') + self._next_button.set_sensitive(False) + + self.set_default_size(min_size[0], min_size[1]) + self.set_position(gtk.WIN_POS_CENTER) + self.has_separator = True + self.add_action_widget(self._prev_button, gtk.RESPONSE_REJECT) + self.add_action_widget(self._next_button, gtk.RESPONSE_ACCEPT) + self.add_button('Quit', gtk.RESPONSE_CLOSE) + self.connect('close', gtk.main_quit) + self.connect('destroy', gtk.main_quit) + self.connect("response", self._on_button) + + self._enter_pane(start_pane, True) + + def lock(self): + """Freeze the previous and next buttons. + + This method is called by ActivePane instances when their + background task is started. + """ + self._prev_button.set_sensitive(False) + self._next_button.set_sensitive(False) + + def unlock(self): + """Unfreeze the previous and next buttons. + + This method is called by ActivePane instances when their + background task is terminated. + """ + self._prev_button.set_sensitive(len(self._track) > 1) + self._next_button.set_sensitive(not self._track[-1].is_terminal()) + + def _on_button(self, w, response_id): + """The frame buttons handler.""" + if response_id == gtk.RESPONSE_REJECT: + if len(self._track) > 1: + self._exit_pane(self._track.pop(), False) + self._enter_pane(self._track[-1], False) + elif response_id == gtk.RESPONSE_ACCEPT: + p = self._track[-1].next() + if p: + self._exit_pane(self._track[-1], True) + p.subject = self._track[-1].subject + self._track.append(p) + self._enter_pane(p, True) + elif response_id == gtk.RESPONSE_CLOSE: + gobject.idle_add(gtk.main_quit) + + def _enter_pane(self, pane, forward): + """Handle a new pane display.""" + if forward: + pane.enter() + self._prev_button.set_sensitive(len(self._track) > 1) + self._next_button.set_sensitive(not pane.is_terminal()) + self.vbox.pack_start(self._track[-1], True, True) + self.vbox.show_all() + + def _exit_pane(self, pane, forward): + """Handle a pane exit.""" + if forward: + pane.leave() + self.vbox.remove(pane) + + +class AboutTestPane(Pane): + def __init__(self, frame): + Pane.__init__(self, frame) + + self.link_to(InputTestPane) + + self.pack_start( + gtk.Label('wizpym, Wizard Python Module v' + __version__), + True, True, 10) + self.pack_start( + gtk.Label('Copyright 2010 David Soulayrol '), + False, False, 5) + + comment = gtk.Label() + comment.set_markup('This wizard tests the main features of wizpym, ' + 'which are:\n\n' + '• The handling of a flow of panes, each one having ' + 'any number of successors.\n' + '• A full history to go back the full track down to ' + 'the beginning and to keep the status of the reverted panes.\n' + '• Data transfer from one pane to the next one.\n' + '• The possiblity to do heavy stuff in background on ' + 'each pane.\n\n\n' + 'This program comes with ABSOLUTELY NO WARRANTY. ' + 'This is free software and you are welcome to ' + 'redistribute it under certain conditions. See ' + 'GNU licenses ' + 'for details.') + comment.set_line_wrap(True) + self.pack_start(comment, True, True, 10) + + +class InputTestPane(Pane): + def __init__(self, frame): + Pane.__init__(self, frame) + + self.link_to(ActiveTestPane) + self.link_to(FinalTestPane) + + button = gtk.RadioButton(None, 'Search Google Code') + button.connect("toggled", self._on_button, ActiveTestPane) + button.set_active(True) + self.pack_start(button, True, False) + + box = gtk.HBox(False, 10) + self._entry = gtk.Entry() + box.pack_start(gtk.Label('Keywords:'), False, False) + box.pack_start(self._entry, True, True) + self.pack_start(box, False, False) + + button = gtk.RadioButton(button, "Go to final pane") + button.connect("toggled", self._on_button, FinalTestPane) + self.pack_start(button, True, False) + + def leave(self): + self.subject = self._entry.get_text() + + def _on_button(self, w, klass): + if w.get_active(): + self.switch(klass) + + +class ActiveTestPane(ActivePane): + PATH = 'https://www.google.com/codesearch/feeds/search?' + XMLNS_ATOM = '{http://www.w3.org/2005/Atom}' + XMLNS_GCS = '{http://schemas.google.com/codesearch/2006}' + + def __init__(self, frame): + ActivePane.__init__(self, frame) + + self.link_to(FinalTestPane) + + self._label = gtk.Label() + self._label.set_line_wrap(True) + self.pack_start(self._label, False, False) + + self._inner_pane = gtk.VBox(False, 5) + self.pack_start(self._inner_pane, True, True) + + def enter(self): + self._label.set_text('Searching for: "' + self.subject + '"') + + self.remove(self._inner_pane) + self._inner_pane = gtk.VBox(False, 5) + self._inner_pane.pack_start(gtk.ProgressBar(), True, False) + self.pack_start(self._inner_pane, True, True) + + # Start thread + ActivePane.enter(self) + + def _runner(self): + # The True value below is here so that the timer is maintained. + timer = gobject.timeout_add( + 100, lambda: self._inner_pane.get_children()[0].pulse() or True) + gobject.idle_add(self._inner_pane.get_children()[0].set_text, 'Connecting...') + c = httplib.HTTPSConnection('www.google.com') + + gobject.idle_add(self._inner_pane.get_children()[0].set_text, 'Searching...') + c.request( + 'GET', self.PATH + urllib.urlencode({'q': self.subject}), + None, {'GData-Version': '2'}) + + # Simulate a longer task. + gobject.idle_add(self._inner_pane.get_children()[0].set_text, 'Computing...') + time.sleep(3) + + gobject.source_remove(timer) + gobject.idle_add(self._show_response, c.getresponse()) + + def _show_response(self, r): + self.remove(self._inner_pane) + self._inner_pane = gtk.VBox(False, 5) + + if r.status != 200: + self._inner_pane.pack_start( + gtk.Label('Got error (' + r.reason + ') from google'), True, False) + else: + tree = etree.fromstring(r.read()) + for e in tree.findall(self.XMLNS_ATOM + 'entry'): + self._inner_pane.pack_start( + gtk.Label(e.find(self.XMLNS_GCS + 'package').get('name')), False, False) + + self._inner_pane.show_all() + self.pack_start(self._inner_pane, True, True) + + +class FinalTestPane(Pane): + def __init__(self, frame): + Pane.__init__(self, frame) + self.add(gtk.Label('Last Pane: no successor.')) + + +if __name__ == '__main__': + import httplib, urllib, time + import xml.etree.ElementTree as etree + + gobject.threads_init() + Frame(AboutTestPane).run() + gtk.main() +