Getting Things GNOME! Summer of Code 2010 — Paul Kishimoto

Revised Proposal


  • To improve integration with complementary applications and support a wider variety of user workflows, blueprint and begin a transition of GTG from a monolithic to a client/server model, with communication over DBus.


Transitioning GTG! from a monolithic to a client-server model offers internal and external advantages.

The chief internal advantage is clarity in the explicit separation of user interface from the underlying data model and storage logic. In particular, a GTG! server would be a much smaller collection of code with fewer dependencies, and thus easier to cover with a comprehensive test suite.

Also, changes to the user interface (bugfixes or improvements) could be distinguished by whether or not they demanded extension of the DBus interface. If they did require such changes, it would prompt an discussion of the question, "Should this user case be handled by the UI in a different way, or does it identify a shortcoming of the data model." Bugs not requiring DBus API changes, on the other hand, could be fixed by developers especially familiar with the GTG client UI.

External advantages include the possibility of supporting multiple UIs, in particular the web-based UI proposed by Karlo Jež for his GSoC 2010 project. Also, the potential for collaboration with other tools that expose or consume DBus interfaces — for example, Hamster, Tomboy/Gnote and GAJ/Zeitgeist — would be improved. The simplicity of a well-documented DBus API will encourage developers of these others application to, in turn, improve collaboration with GTG!. This process can be kick-started as part of my work by contributing patches to those applications.

Finally, GTG developer discussion around user cases and data model can inform a wider conversation on how the overall GNOME desktop experience can better suit itself to the way users actually want to work and play.


  • Week 1
    • Learn about DBus, including current GTG interface, interfaces of other applications.
    • Map the GTG data model, with notes on key discrepancies with other tools.
  • Week 2
    • Enumerate user cases for task & work tracking.

    • Develop a proposed GTG data model, including any modifications.
  • Weeks 3-4
    • Identify current code segments in GTG as "client", "server", or "mixed".
    • Spec a DBus API which supports all current calls between "client" and "server" segments.
    • Draft a proposal for shared, pan-GNOME (or f.d.o?) task/work tracking semantics.
  • Weeks 5-6
    • Code a test suite against the proposed DBus API.
  • Weeks 7-8
    • Code GTG server infrastructure implementing DBus API
    • Continuous testing of above; add some tests for multi-backend behaviour.
  • Weeks 9-10
    • Refactor GTG UI piece-by-piece to use DBus instead of Python calls.
  • Weeks 11-12
    • Prepare & submit final report.

    • Revise draft proposal on GNOME task semantics.

Initial Proposal

  • Copy-and-pasted from my GSoC application.

For the Google Summer of Code 2010, I am proposing work on the Getting Things GNOME! task management application ("GTG"), as suggested at By continuing my involvement as a contributor to GTG, I will design and implement software integrating GTG with many web-based task tracking tools, allowing GTG to become an easy-to-use and natural part of GNOME users' workflow.

As an aerospace engineering student, both my undergraduate and graduate coursework and thesis research have contributed to my skill as a developer. In order to practice good engineering, especially in the areas of computational fluid dynamics and unmanned vehicle control, one must have an easy facility with programming so that one can concentrate on the scientific theories without stumbling over the code one is using to study them. I have worked to cultivate such an ability, including familiarity with best-practices software design concepts, proper use of version control, and fluency in C, C++, Fortran, PHP, Python and bash/dash shell scripting.

Beyond my academic life, however, I am an active user of and contributor to Ubuntu and many GTK+ and GNOME applications I have discovered through it. In addition, I have served as Webmaster or Communications Director for a number of organizations, including the University of Toronto Engineering Society, an organization of 4500 members. In this role I have developed web services based on Free software including Drupal and Moin Moin, which has included familiarizing myself with the APIs and codebase of each in order to develop custom extensions.

My involvement with GTG has stemmed from my enthusiasm for its potential as a tool. I developed the implementation of its preferences dialog, including a rewrite of its plugins management interface (; one merge ( landed 1190 lines of code.

A common theme in the above work is my ability for collaboration with other developers. In every instance I have found that a voracious appetite for reading other people's code and API documentation has supplied me with knowledge that has streamlined software development and allowed me to creatively reuse of others' work.

Proposed Work

The work of integrating GTG with existing applications and improving its user experiences involves three distinct areas of work and attendant planning, as detailed below.

First, a detailed survey of existing planning and Getting Things Done (GTD) tools is required. The GTG data model recognizes certain tasks concepts—start and due dates, fuzzy dates ("now", "soon", "later"), single-parent hierarchy, multiple tagging, task completion, and task note text.

When other services are GTD-focused, they recognize overlapping concept sets that also include concepts not included in GTG—for example, partial completion, estimated time-to-complete, and multiple-parent hierarchy.

There are also applications with similar aims to GTG that are not GTD-focused. Examples include the GNOME Activity Journal (formerly GNOME Zeitgeist,, which provides an interface to Tracker metadata and a timeline of user actions; and Project Hamster (, a more work-focused application that automates fine-grained time-logging.

These are both journalling applications that track current & past activity, whereas GTG is a planning tool. Nevertheless, to a user engrossed in his or her work, future plans flow seamlessly into present work and the recorded past. The user's software should mirror this behaviour, so closer integration of GTG with these tools is required.

Similarly, Planner ( is a Gantt-model application for large-scale project planning. Many users consider them parts of a whole; so their individual workload (GTG) should be easily & closely linked to any projects (Planner) of which they are a part.

In partnership with the GTG developers, I will distinguish cases where the current state-of-the-art tools motivates changes to the GTG data model, from cases where GTG can simply access the APIs or provide easy opportunities to conditionally invoke other applications.

An attendant benefit of this survey will be that the popularity, concept map and API features of each application and service will provide evidence on which to determine the relative priority of various plugins in GTG, as well as the expected difficulty and time to implement them. This information will be useful to contributors who may desire tool integration which do not fit with the scope of my GSoC 2010 work; for example, potential GSoC 2011 participants. By documenting my process as I make these determinations, I will also provide assistance to future contributors wishing to, for example, update GTG to match the progress of integrating the Activity Journal into future versions of the GNOME desktop.

Secondly, the user interface of GTG itself must be considered. As an example, some thoughts I proposed on a user interface for selecting and controlling backends ( involve creative use of custom GtkCellRenderers. These enhancements follow the principle that wherever possible, the features of GTG must be invisible to the user, quietly supporting instead of forcing jarring changes in the way (s)he works.

To provide tangible help to the GTG developers, I will enumerate a list of test cases, and endeavour to provide both automated testing (by adopting one of the many available Python unit testing tools, and user tests (using Mago and the Linux Desktop Testing Project) to verify GTG's behaviour in the presence or absence of the complementary tools listed above.

I will also enlist user input by soliciting testing feedback from a mix of experienced and inexperienced users, in order to ensure that support and cues in the GTG interface allow an easy recognition and use of its many features.

Thirdly, the technical work of integration with existing tools will involve using the information gleaned in the first work area to provide plugins, backends and enhancements to GTG core.

While this work will occur before or in parallel with the prior two areas, it is a collection of more straightforward programming tasks. By exploiting the modularity, MVC-style separation and DBus interface already present in GTG, I can work simultaneously on a number of different lines of integration.

This work may also involve submitting patches to the other GNOME desktop tools with which GTG is to be integrated, in order to enhance their APIs.

To these tasks I will bring the careful consideration, thoroughness, and reference to best practice that allowed me to introduce the GTG preferences dialog with minimal revisions to my initial proposed merge.


A timeline follows. Semi-weekly (or more frequent) blog posts documenting progress will continue throughout.

Weeks 1-2 (24 May) — start

  • Begin GTD tool survey, involving gtg-users mailing list
  • Activity Journal, Tracker, Hamster & Planner codebase & API familiarization.

  • Python testing tool evaluation.
  • Mago & LDTP learning & familiarization.

  • Setup Personal Package Archive & test packages for user involvement.

Weeks 3-4 (7 June)

  • Complete application/tool survey, discuss & report results with GTG contributors & developers.

  • Prototype joint usage models & distinctions with a "GTG-only" use case.

  • Initial user testing implementation (on unaltered GTG codebase) & call for participants.

  • Enumerate automated test-cases.

Weeks 5-6 (21 June)

  • Automated testing implementation.
  • Begin patches to other task/planning applications necessary for GTG integration.
  • GTG plugins for application integration, first cut.
  • Continue soliciting user testing.
  • User interface design & scaffolding within GTG.

Weeks 7-8 (5 July)

  • Summarize first-phase user testing results.
  • Implement UI changes.
  • Update user & automated testing to include application integration use-cases.

  • Prepare midterm evaluation: present usable test release of Week 5-7 results.
  • Call for participants in second-phase testing.

Weeks 9-10 (19 July)

  • Modify GTG enhancements to degrade gracefully (if necessary patches to other applications are still pending).
  • Documentation!
    • End-user help content & UI-inline tweaks.

    • Report on user testing.
    • Bug triage & other response to user feedback.

  • Prototype and/or code low-priority GTG plugins for application integration.

Weeks 11-12 (2 August)

  • Prepare & submit final report.


Throughout my education I have come in contact with fantastically expensive engineering software—MATLAB, AutoCAD, Solidworks, Aspen, Blackboard and others being among others costing thousands of dollars per instance. My horror that important, basic research and the education of future engineers should be hobbled by such prohibitive costs has contributed strongly to my enthusiasm for Free software. I believe in the potential of Free development to produce tools that conform to our behaviour as human beings, instead of distorting it to produce profit for a few.

As I continue my engineering career, I know that wherever possible I will use Free tools for my work, and develop them where they do not yet exist. Working on GTG as a GSoC 2010 participant would be an auspicious first step on this path.

Apps/GTG/SoC/2010/PaulKishimoto (last edited 2015-01-06 10:33:39 by OliverPropst)