École Centrale Nantes & OpenOffice.org Education Project featuring: The Eraser (implementation of annotation features in OpenOffice.org)

École Centrale Nantes
&
OpenOffice.org
Education Project
featuring:

« The Eraser »

Aude Quintana, Olivier Girardot & Eric Bachard Libre Software Meeting Nantes 9th July 2009

The project
●
OOo and the Education Project
●
Our project itself
●
How it works ?
●
The results of the project
●
The future for OOo
●
Conclusion
2

OOo and Educoo ...


The OpenOffice.org Project,
is ...
A Community Project,
Itself organized in (a lot of) projects


Types of Projects
There are 3 project types in OpenOffice.org
organization

●
Accepted : code development (API, modules),
Marketing, QA,...
●
Incubator : new experimental projects:
Education, Extensions
●
Native lang : native lang communities


Role of the « Incubators »
projects

●
Experiment
●
Validate a new need
●
Innovate and make the OpenOffice.org Project
progress


Education Project
is

anincubator and
INTERNATIONAL
project type


The goals of the Education
Project ?
This is a young project,
Belonging to OpenOffice.org
with the main goal to
create a bridge
between Educational World
and OpenOffice.org


' Who '
is the Education Project ?
Approximatively 100 members,
Students, developers (mostly)
From all countries
All participate to OpenOffice.org


The 3 main objectives of
the Education Project :
●
Create a network of teachers using
OpenOffice.org
●
Provide a space for exchanging pedagogical
contents, under free file formats
●
Teach, provide young (core-)developers to
write code for OpenOffice.org


Back to the 3 Objective : rd

provide new developers
Idea :

Associate : theory (The teachers)
The know how (professional developers)
The actors (students, profs, and so on)
Mentors (OpenOffice.org Project developers)
The needs (features for OpenOffice.org)


Already started actions

●
Online Courses « ClassRooms »
●
Projects with engineers schools students, and
shools contributions


ClassRooms

Online Courses ( IRC )

See:

http://wiki.services.openoffice.org/wiki/Education_Project/Class


Education Project Effort

●
Mentored projects with active participation of
the schools

http://wiki.services.openoffice.org/wiki/Education_Project/Effo


Schools who joined the project

Epitech/Epita (Paris, France)
École Centrale Nantes (Nantes, France
UTBM (Sévenans, France)
Seneca College (Toronto Canada)

…


Examples
Mozilla 1.7.5 → Seamonkey 1.1.14 migration
(Pierre Pasteau / Epitech Paris ) QA in progress,
will be integrated

Developers who contributed : Frank Schönheit
(Sun MicroSystems), Eric Bachard (unaffiliated)


Examples
Aude Quintana, Olivier Girardot (École Centrale
Nantes): implementation of the eraser features,
with Tablet PC and Impress. Code review in
progress.

Developers who contributed : Thorsten Behrens
(Novell)
Managed by Morgan Magnin, for Ecole Centrale
Nantes

Examples
Frédéric Gelot, Pierre-Jean Parot (École
Centrale Nantes): annotations implementation
with Tablet PC and Impress

Developers who contributed : Thorsten
Behrens (Novell)

Managed by Morgan Magnin, for ECN


Other example :
Seneca College, Toronto
Professor : Fardad Soleimanloo
(4 projects started, expected for Summer 09)

All other proposed subjects :

http://wiki.services.openoffice.org/wiki/Education_Project/Effort


Scheduled Project: july to december 2009

Thomas Fontenay, Abdelkader Bellabes ( Epitech
Paris ) : performance improvement of OOo4Kids on
powerless machines (include backport to
OpenOffice.org for the most interesting solutions),
profiling, User Interface Improvement

Developers : Pierre Pasteau, Eric Bachard
Managed by Julien Ballet for Epitech Paris


(partial) Conclusions
The creation of reliable relations with engineers
schools from everywhere works well (promising !)

This project only needs help ..
We miss
- developpers
- sponsors
- … mainly money in fact (founding travel,
hardware)

back to the feature ...


Tablet Pc and Centrale
●
The ECN was selected to take part into the
HP contest : Technology For Teaching
●
We chose to set up an OpenSource platform
(Linux/Ubuntu) on these computers and
improve the way it worked
Improve how someone can annotate
slides in OOo Impress during a
slideshow


2 projects in one :
●
« The Eraser » :
– To erase these annotations.
●
« The Saving Machine » :
– To save them and restore them.


Objectives and Specifications
●
Be able to completely erase screen
annotations;
●
Erase some parts manually at the following
sizes:
– Little
– Medium
– Big


OpenOffice.org
●
C++ core;
●
8.36 Go of data once everything compiled ;
●
9,000,000 lines code ;
●
Has it's own system of :
– extensions : UNO (Universal Network
Object) : to be able to contribute in
Java/Python...


How things work


Implementation and Concept

●
First part : Persistence and Full Erasing


Erasing Implementation
●
Erase, means :
– For one pixel, redraw it at its original
color before the annotation;
– For a slide, redraw it entirely;
●
Problem :
– Erasing requires to have a copy of the
original image before to proceed the
modification;


Where is the bitmap ?


Implementation and Concept

●
Second part : Partial deleting


Notion of Clipping
●
Allows to define the part of the bitmap
to be redrawn, means :
– Partial erasing ;
– Optimisation ;
– Eraser size management;
●
Add parameters to the User Interface
for modifying the eraser size.


The bug with transformation


Resolution
●
With Thorsten Behrens's help,
regarding the right coordinates
transformation to perform


Manage conflicts between
projects
●
The Saving Machine aims to assume
annotation persistence ...
●
… while The Eraser has the objective of
erasing annotations;
Means : conflicts to solve


Maintainability guaranteed
●
CWS creation (Child WorkSpace)
●
Strong collaboration, code review and
validation by Eric Bachard and Thorsten
Behrens
●
Follow-up of the OOo specification
process


Possible Optimisations

●
Draw the polygons in a separate layer ;

●
Improve the interaction between
storage and erasing ;


Conclusion
●
Collaboration with a big scaled FOSS
Project
– Understanding of the existing code ;
– Insertion in the community ;
– Precise specifications writing ;
– Real answer to a real demand;


Conclusion
●
Perspectives :
– Upstream integration in a future
release
– Possible improvements ;
– Communication about the project ;


Thanks !

Questions ?


Auteurs : Olivier Girardot (ssaboum@gmail.com), Eric Bachard
(eric.bachard@free.fr) www.educoo.org 2009
Document sous licence libre
http://creativecommons.org/licenses/by-sa/3.0/deed.fr


École Centrale Nantes & OpenOffice.org Education Project featuring: The Eraser (implementation of annotation features in OpenOffice.org)

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