See also Front-ends to Tracker data

Plugin Gantt Chart

Introduced in Tiki19

Use this wiki plugin to help you manage projects within Tiki, where project data is stored in Tiki trackers. You will be able to draw Gantt chart diagrams, and edit them easily to have your gantt chart updated while the project life evolves changing project details, internal deadlines, etc. Please see: jQuery Gantt editor.


Introduced in Tiki 19. Required parameters are in bold.
Preferences required: wikiplugin_ganttchart
Parameters Accepted Values Description Default Since
begin Permanent name of the field to use for event beginning
end Permanent name of the field to use for event ending 19
depends word Permanent name of the field to use for row dependency 19
level word Permanent name of the field to use for row level 19
name word Permanent name of the field to use for row name 19
order word Permanent name of the field to use for row number order 19
status word Permanent name of the field to use for row status 19
trackerId int Tracker to search from 0 19
code word Permanent name of the field to use for row code 19
canDelete none Flag field that permit to delete or not tasks 19
description word Permanent name of the field to use for row description 19
effort word Permanent name of the field to use for effort ending, values in milliseconds 19
endIsMilestone none Flag field to end is milestone 19
ganttId word Gantt chart ID value to filter 23
ganttIdField word Permanent name of the field to use to filters the ganttId 23
canWriteOnParent none Flag field to write or not in parent tasks 19
progress word Permanent name of the field to use for row progress, values between 0-100 19
resourceId word Permanent name of the field to use for resources ending 19
roleId word Permanent name of the field to use for roles ending 19
startIsMilestone none Flag field to start is milestone 19
canWrite none Flag field to write or not in tasks 19
canDuplicate y
Flag field to allow duplicate tasks y 23

Get Started

As mentioned above, the project data used to create the Gantt charts are stored in Tiki trackers. Create the Tracker with all the specific fields or use this Profile as a template, adjusting it to your own needs. Start with the Plugin Gantt Chart by adding the code to a Wiki page once you have created a tracker.

{ganttchart trackerId="1" name="trackerganttTaskName" begin="trackerganttStartDate" end="trackerganttEndDate" resourceId="trackerganttResponsible" roleId="trackerganttRole" status="trackerganttStatus" progress="trackerganttProgress" canWrite="true" canDelete="true" canWriteOnParent="true" description="trackerganttDescription" code="trackerganttCode" effort="trackerganttEffort" resourceId="trackerganttResourceId"  order="trackerganttOrder" level="trackerganttLevel" depends="trackerganttDependencies"}


The previous code will give the result this overview:

Plugin Gantt Chart Overview
Click to expand

Key Features

The Gantt Chart Plugin allows you to manage a complete project of any size, to divide it into tasks, to associate resources with each one with its role. When managing the project, you can create a task hierarchy, create dependencies between tasks, determine milestones, highlight the critical path, modify resources, change time scheduling, etc.

To quickly build Gantt charts, use the undo, redo, un-indent task, indent task, move up, move down, delete, EXPAND_ALL, COLLAPSE_ALL, zoom out, zoom in, Print, CRITICAL_PATH, control options to handle the different task display modes, fullscreen, task status color control and the Save button.

With a simple click, set the critical path; remove a task; switch to fullscreen mode, etc.

Plugin Gantt Chart Project hierarchy
Click to expand

Organise projects into tasks linked by dependencies

Plugin Gantt Chart Options
Click to expand

Explore Plugin Gantt Chart

Changing a task
Plugin Gantt Chart Change Task Details
Click to expand

In a few clicks change the status, code, name, start date, end date, duration or progress of the task just by clicking on the element you need to update.

Plugin Gantt Chart Task Editor
Click to expand

When you want to modify a task, click on the edit icon or on the diagram that represents a task, a window will open Task Editor, change the code, the name of the task, define milestones, add a description of the task, etc.

Moving a task
Plugin Gantt Chart Moving a task
Click to expand

After editing a task, use the «move up» and «move down» controls to move a task from bottom to top or from top to bottom.

Creating dependencies

Plugin Gantt Chart Creating dependencies
Click to expand

Very easy to create dependencies between two or more tasks by simply dragging the mouse. Place the mouse over the graph, once the two points have been shown, select one and dragging it to another task.

Changing task duration
Plugin Gantt Chart
Click to expand

Easily change the duration of tasks with just a simple drag of the mouse.

Adjusting the chart preview
Plugin Gantt Chart Zoom option
Click to expand

Adjust the zoom option to view the charts according to day, week, month, semester, and year.

Some extra details on some fields

  • id: used to synch data with the server. If the id is supplied by the server it will untouched. Tasks created client side will acquire a temporary id starting with “tmp_”
  • level: it is the depth (the indentation) of a task in the Gantt structure. The root task is at level 0 (zero), its children at level 1 (one) and so on. Levels must be consistent with the project structure: you can’t have a task of level n+1 if you don’t have a task of level n above on the list
  • start, end: are expressed in milliseconds. “start” is set to the first millisecond of the day, “end” is set to the last millisecond of the day.
  • duration: is always in working days. If there are holidays on the calendar the end date will take it into account. Actually the end date is always recomputed using “start” and “duration”, and it is supplied for comfort
  • startIsMilestone, endIsMilestone: booleans. Once set to true, task’ start/end can’t move accidentally. You always can change dates directly on the task, but not by acting on children or predecessors.
  • depends: a string comma delimited containing indexes of tasks on which this task depends. Multiple dependencies are supported. Only the finish-to-start dependency type is supported (other types can be workarounded by introducing intermediary brother tasks or children). It is possible to specify a “lag” in days by using a “:”. E.g.: 7:3,8 means that the task will start 3 days after task 7 is completed and task 8 is completed.
  • status: this is a string representing the status of the task. Allowed statuses are: STATUS_ACTIVE, STATUS_DONE, STATUS_FAILED, STATUS_SUSPENDED, STATUS_UNDEFINED. As stated before, task statuses allow to use your project like a sort of workflow: e.g.: if “task b” depends on “task a”, “task b” will remain in “STATUS_SUSPENDED” until “task a” will pass from “STATUS_ACTIVE” to “STATUS_DONE”. For the complete status transition rules see below.
  • progress: a number that specifies progress: 0% none 50% half way and so on. In some cases 123% can be a meaningful value for progress, so there are no constraints.

Status transition rules (aka project workflow)

Task statuses are a key feature in this plugin.

When you close some tasks (change status to “completed”) you will see how dependent tasks/children will change their status according to the following rules:

  • any status-> STATUS_DONE: may activate dependent tasks, both suspended and undefined. Will set to done all descendants.
  • STATUS_FAILED -> STATUS_DONE: do nothing if not forced by hand.
  • STATUS_UNDEFINED -> STATUS_ACTIVE: all children become active, if they have no dependencies.
  • STATUS_SUSPENDED -> STATUS_ACTIVE : sets to active all children and their descendants that have no inhibiting dependencies.
  • STATUS_DONE -> STATUS_ACTIVE: all those that have dependencies must be set to suspended.
  • STATUS_FAILED -> STATUS_ACTIVE: nothing happens: child statuses must be reset by hand.
  • any status-> STATUS_SUSPENDED: all active children and their active descendants become suspended. when not failed or forced
  • any status-> STATUS_UNDEFINED: all active children and their active descendants become suspended. when not failed or forced.
  • any status-> STATUS_FAILED: children and dependants are set to failed.


Improvements in Tiki23

Added gantt items duplication within same tracker since Tiki23:

  • Use ganttId to indicate the value to filter items;
  • User ganttIdField to indicate the field perm_name that holds the value above;
  • Use canDuplicate to indicate if it can duplicate or not (both ganttId and ganttIdField need to have values)
  • When duplicating items, a new ganttId is chosen and also the option to update the existing wikiplugin_ganttchart to display the new duplicated items.
  • If user does not have permissions to create new tracker items, the duplication is not available.



Get Started

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