Difference between revisions of "KTimeTracker"

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== Where is what ? ==
== Where is what ? ==
* The latest development sourcecode is available via web at https://projects.kde.org/projects/kde/kdepim
* The latest development sourcecode is available via web at https://cgit.kde.org/ktimetracker.git/
* You can subscribe to watch code changes at
* Craft ''blueprint'': https://cgit.kde.org/craft-blueprints-kde.git/tree/extragear/ktimetracker
* You can get informed on irc about code changes at freenode, channel #kde-commits
* You can discuss about KDE pim development on freenode, channel #kontact
* You can discuss about KDE pim development on freenode, channel #kontact
* The api documentation is available at http://api.kde.org/4.x-api/kdepim-apidocs/ktimetracker/html/index.html
* The user documentation is generated from https://cgit.kde.org/ktimetracker.git/tree/doc
* The user documentation is generated from  
* KTimeTracker all-you-need in the internet: https://userbase.kde.org/KTimeTracker
* KTimeTracker all-you-need in the internet:
== Development Direction ==
== Development Direction ==

Revision as of 23:19, 16 June 2019

ktimetracker running on the N810

KTimeTracker is a standalone desktop application. This page is for people who want to participate in the ktimetracker community. So, for (future) ktimetracker developers.

How to build


mkdir build && cd build
cmake .. && make && make install


Install Craft, then:

craft ktimetracker

Developing KTimeTracker

So you want to become a KTimeTracker developer

Here are your classes:

  • mainwindow.*: Is the main window of the KDE application
    • timetrackerwidget.*: Is a widget with no or several tabs that contain
      • taskview.*: Is a treeListWidget that contains:
        • task.*: A QObject and QTreeWidgetItem. A task can be constructed from a taskview and a todo. As soon as you instantiate a task, it becomes visible in your TreeWidget.
        • timetrackerstorage.*: Is the storage backend that contains a:
          • KCal::ResourceCalendar


ktimetracker is a standalone application. MainWindow displays a timetrackerwidget, that is a ktabwidget containing one or more taskviews. A taskview is associated with a timetrackerstorage object that holds a calendar with todos and events. A taskview is a QTreeWidget that holds tasks. A task has a summary (name), a priority and times: the time, total time, session time and total session time. Over the QTreeWidget, a task can have subtasks. The total time is defined as the task's and all its subtasks' times.

Roadmap to the classes

See http://api.kde.org/4.x-api/kdepim-apidocs/ktimetracker/html/

main -> mainwindow ------------------------                                                         -> task
                                            \                                                     /
                                             -> timetrackerwidget -(contains n>=0)-> taskview -
                                            /                                                     \
ktimetracker_plugin -> ktimetrackerpart ---                                                         -> timetrackerstorage 


ktimetracker's program main.cpp creates mainwindow, this creates a timetrackerpart this calls timetrackerwidget, this calls taskview, this contains a timetrackerstorage.

karmstorage stores and loads the events and tasks. taskview displays them. timetrackerwidget displays one or more taskviews in tabs, plus the searchWidget. timetrackerpart can be integrated into a mainwindow or a kontact plugin. mainwindow adds the menu.

MainWindow is the outermost layer and initializes the menus and actions, sets up the status bar, and handles many of the signal-to-slot connections. It holds a pointer to the timetrackerwidget and Preferences objects and implements the ktimetracker DBUS interface.

TaskView does most of the work in the application. This QListWidget subclass sets up the columns in the list, the idle detection timer, the auto save timer, and the desktop tracker. It starts and stops timers, handles importing and exporting and displays the edit task dialog in response to user action. TaskView holds a private pointer to Preferences and a timetrackerstorage object.

A Task is a QListViewItem subclass stores state such as the timer totals, if a timer is currently running for the task. It also defines the list view sort order and can return a pointer to a KCal::Todo object that holds the same information.

Preferences is a singleton that stores configuration options. It raises signals when options change (for example, the location where the ktimetracker data is stored) so the application can react and adjust.

timetrackerstorage is a singleton that creates an interface for storing ktimetracker data. Currently, it uses KDE Resource framework and stores data in the iCalendar format.

KTimeTrackerSettings stores ktimetracker's configuration, settings, preferences or however you call it. It is declared in the file ktimetracker.h.

how configuration is programmed

Configuration is also called preferences. The following files are involved:

  • cfgbehavior.ui
  • ui_cfgbehavior.h - automatically created from cfgbehavior.ui
  • preferences.h - saves which tasks will be shown expanded and which ones collapsed
  • preferences.cpp - saves which tasks will be shown expanded and which ones collapsed
  • preferences.moc - automatically created from preferences.h
  • ktimetrackerconfigdialog.cpp
  • ktimetracker.kcfgc
  • ktimetracker.kcfg
  • ktimetracker.h - declaring the class KTimeTrackerSettings. This file is automatically generated from ktimetracker.kcfg.
  • ktimetracker.cpp - implementing the class KTimeTrackerSettings. This file is automatically generated from ktimetracker.kcfg.
  • ktimetrackerconfigdialog.cpp
  • ktimetrackerconfigdialog.h

ktimetracker in the web

If you need to update screenshots you might have to do it on the following pages:


dbus is clearly a developer topic. To test the dbus functionality of your KTimeTracker, have KTimeTracker running and proceed like in this example:

qdbus org.kde.KTimeTracker
qdbus org.kde.KTimeTracker /KTimeTracker
method void org.kde.KTimeTracker.KTimeTracker.quit()
qdbus org.kde.KTimeTracker /KTimeTracker org.kde.KTimeTracker.KTimeTracker.quit

How to reproduce a stale lock

Here is an example to give you an idea:

touch .kde/share/apps/kabc/lock/_home_tom_.kde_share_apps_karm_karm.ics.lock

How to get rid of debugging output

cmake -DCMAKE_BUILD_TYPE=Release


  • ?

Where is what ?

Development Direction

The following similar programs can give you inspiration how to move forward developing:

  • hourglass
  • gnotime
  • titrax
  • taskCoach
  • Hamster


The idletimedetector is in the equally-named .cpp and .h file. It starts a qtimer and at every timeout, checks, if the X extension delivers for the last user interaction a timepoint that is further away than the maxIdleTime.

About storage

The storage of your KTimeTracker data takes place in an iCal file. That format needs a bit of explanation. A simple one looks like the following:

PRODID:-//K Desktop Environment//NONSGML libkcal 3.5//EN




  • Find ktimetracker's open bugs (without NEEDINFO bugs) with this query
  • find all ktimetracker's bugs with this query

coding style

It is more important that you contribute than that you contribute with the right coding style. That having said, I prefer if you use code that is consistent with QtCreator's defaults. Opening and closing brackets and parentheses should be on the same row or column.

development direction

There should not be any "New" and "Close". ktimetracker should contain exactly one taskview. See https://bugs.kde.org/show_bug.cgi?id=182317 and https://bugs.kde.org/show_bug.cgi?id=265085

The help menu

The help menu is stupidly overloaded and I cannot do anything about it because it is somewhere hidden in the library code. Would love to simplify it. "Help" does not need subitems - you want help.


recent activity

Related Projects



Maintainer knowledge

If you want to hand over maintainership, here is some info:

This page was last edited on 16 June 2019, at 23:19. Content is available under Creative Commons License SA 4.0 unless otherwise noted.