École centrale nantes & openoffice.org education project featuring: the eraser (implementation...

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

École Centrale Nantes&

OpenOffice.orgEducation Project

featuring:

« The Eraser »« The Eraser »

2Aude 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


OOo and Educoo ...


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


Types of ProjectsThere 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

an incubator andINTERNATIONALproject type


The goals of the Education Project ?

This is a young project,Belonging to OpenOffice.orgwith the main goal tocreate a bridgebetween Educational World and OpenOffice.org


' Who ' is the Education Project ?

Approximatively 100 members,Students, developers (mostly)From all countriesAll 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 3rd Objective : 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/ClassRoom

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


Education Project Effort

● Mentored projects with active participation of the schools

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



Schools who joined the project

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

…


ExamplesMozilla 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)


ExamplesAude 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


ExamplesFrédéric 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, TorontoProfessor : Fardad Soleimanloo(4 projects started, expected for Summer 09)

All other proposed subjects :




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 BachardManaged 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 ([email protected]), Eric Bachard ([email protected]) www.educoo.org 2009

Document sous licence libre http://creativecommons.org/licenses/by-sa/3.0/deed.fr

mailto:[email protected]

mailto:[email protected]

http://creativecommons.org/licenses/by-sa/3.0/deed.fr

École centrale nantes & openoffice.org education project featuring: the eraser (implementation...

Technology

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