GanttLink (Type of variable)

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Properties specific to the description of GanttLink variables
Notes
Using GanttLink variables

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Gantt functions

GanttLink (Type of variable)

In french: LienGantt

The GanttLink type is used to define the advanced characteristics of a link between two tasks of a Gantt chart. The characteristics of this Link can be defined and modified using different WLanguage properties.

Remark: See Declaring a variable for more details on the declaration of this type of variable and the use of WLanguage properties.

Example

// Retrieve all the links that point to "ID1"
arrLink is array of GanttLink
arrLink = GanttListLink(COL_Gantt, "ID1")
Link is GanttLink
FOR EACH Link OF arrLink
Trace("Linked to " + Link.SourceID)
END

Remarks

Properties specific to the description of GanttLink variables

The following properties can be used to handle a link between two Gantt tasks:

Property name	Type used	Effect

DestinationID	Character string	Identifier of the destination task. This identifier corresponds to the Property ID defined in the Variable of type GanttTask.
SourceID	Character string	Identifier of the source task. This identifier corresponds to the Property ID defined in the Variable of type GanttTask.
Type	Integer constant	Type of link. The available types of links are as follows: gltStartToStart: "Start to Start" link: The destination task cannot start as long as the source task is not started. gltStartToEnd: "Start to End" link: The destination task cannot end as long as the source task is not started (rare case). gltEndToStart (default value): "End to Start" link: The destination task cannot start as long as the source task is not ended. gltEndToEnd: "End to End" link: The destination task cannot end as long as the source task is not ended.

Notes

A link between 2 tasks is represented by an arrow.
This type of variable:
- is used to add a link via GanttAddLink,
- can be returned by GanttListLink.
An "End to Start" link is created by default between two tasks: the task corresponding to the Property IDSource must be finished before the task IDDestination can begin.
According to their types, the links are drawn on the start or end borders of the tasks.

Using GanttLink variables

The GanttLink variables are used by the following functions:


Versions 19 and later GanttAddLink New in version 19 GanttAddLink GanttAddLink	Creates an "End to Start" link between two tasks displayed in a Gantt Chart column found in a Table (or TreeView Table) control.
Versions 19 and later GanttDeleteLink New in version 19 GanttDeleteLink GanttDeleteLink	Deletes the links from a Gantt Chart column found in a Table (or TreeView Table) control.
Versions 19 and later GanttListLink New in version 19 GanttListLink GanttListLink	Lists the links found in a Gantt Chart column found in a Table (or TreeView Table) control.

Related Examples:

Complete examples (WINDEV): WD Gantt

[ + ] The "WD Gantt" example presents an advanced use of the Gantt Chart control.
This example is used to create a Gantt chart with tasks, links, cumulative tasks and milestones.
The tasks can be edited in a specific window.
The created chart can be saved in a file and reloaded thereafter.

Unit examples (WINDEV): The Gantt control

[ + ] Using a Gantt Chart control