LinkOptions class (Gantt)

The caption field defines the link's caption.

null {null}, indicates no caption
 "caption" {string}, declares a plain-caption
 "<b>text</b>" {string}, displays the text in bold
 "<img>logo</img>" {string}, displays the "logo" image. The image can be added using the exontrol.HTMLPicture.Add() method

The from field indicates the index, identifier/key of the item that hosts the bar, or reference of the item-bar the link starts from (in-item-bar), as one of the following:

• from {number}, indicates a numeric value that defines the index of the item (single/first item-bar of the item)
• from {string}, specifies a string expression that defines the identifier/key of the item (single/first item-bar of the item)
• from {ItemBar}, specifies the object reference to the item-bar

.

The key field specifies the key associated with the link. If no key is provided, the link's plain-caption can be used to request an item. The plain-caption includes no ex-HTML tags, such as <b>, <fgcolor> and so on.

"logo" {string}, defines the link with the giving key (logo). You can use the oGantt.Chart.Links.Item("logo") method to request the link giving its key.

The lag field specifies the delay between linked-activities during the Items.SchedulePDM() method (exLinkPDMDelay). This property specifies the number of days between two linked bars.

null {null}, no lag between linked-activities
 2 {number}, indicates 2 days between linked-activities

The link field specifies the appearance of the link between item-bars, as an object of {type, dir, width, color, arrow, style, startPos, endPos} type, where:

• type {exontrol.LinkTypeEnum}, specifies the type of the link as 0 (rectangular), 1 (direct), 2(straight) or 3(round)
• dir {number}, specifies whether the link's direction is shown or hidden as 0 (hidden), 1(shows the direction/arrow where the link begins), 2(shows the direction where the link ends, default) or 3 shows the arrows in both sides
• width {number}, specifies the link's width or size (1 by default)
• color {string}, indicates the link's color (partial-black by default)
• arrow {string}, indicates the arrow's color. If it is missing or not specified the arrow is shown using the link's color (gray by default)
• arrowSize {number}, indicates the arrow's size. If it is missing or not specified the arrow's size is defined by link's width (1 by default) (since 2.2)
• arrowShape {object}, defines an object of exontrol.Def.Shape type to customize the shape of the link's arrow (for instance shows the link's arrow as a circle instead of a triangle) (since 2.2)
• style {array}, specifies the link's dash pattern to show the lines (solid by default)
• startPos {any}, indicates the list of corners of in-element, the link can start from
• endPos {any}, indicates the list of corners of out-element, the link can end to

.

The following sample defines "straight" links shown in gray:
{
   type: 2,
   color: "gray"
}

The to field indicates the index, identifier/key of the item that hosts the bar, or reference of the item-bar the link ends to (out-item-bar), as one of the following:

• to {number}, indicates a numeric value that defines the index of the item (single/first item-bar of the item)
• to {string}, specifies a string expression that defines the identifier/key of the item (single/first item-bar of the item)
• to {ItemBar}, specifies the object reference to the item-bar

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The type field defines the link's type as 1(Start-Finish), 2(FS or Finish-Start), 4(Finish-Finish) or 8 (Start-Start). Tasks may have multiple predecessors or multiple successors.

Before you begin establishing dependencies, it’s important to understand that there are four types:

• Finish to Start (FS), the predecessor ends before the successor can begin
• Start to Start (SS), the predecessor begins before the successor can begin
• Finish to Finish (FF), the predecessor ends before the successor can end
• Start to Finish (SF), the predecessor begins before the successor can end

The type supports the following values:

• 1 {number} indicates a SF link (SF, S(tart)-F(inish))
• 2 {number} indicates a FS link (FS, F(inish)-S(tart), default)
• 4 {number} indicates a FF link (FF, F(inish)-F(inish))
• 8 {number} indicates a SS link (SS, S(tart)-S(tart))

or

• "SF" {string} indicates a SF link (SF, S(tart)-F(inish)) (the startPos is set on left, endPos is set on right, the Type returns 1)
• "FS" {string} indicates a FS link (FS, F(inish)-S(tart)) (the startPos is set on right, endPos is set on left, the Type returns 2)
• "FF" {string} indicates a FF link (FF, F(inish)-F(inish)) (the startPos is set on right, endPos is set on right, the Type returns 4)
• "SS" {string} indicates a SS link (SS, S(tart)-S(tart)) (the startPos is set on left, endPos is set on left, the Type returns 8)

.

2 or any other value except 1, 4 or 8 {number}, indicates a FS link (FS, F(inish)-S(tart))
 4 {number}, indicates a FF link (FF, F(inish)-F(inish))
 "SS" {string}, indicates a SS link (SS, S(tart)-S(tart))

The visible field indicates whether the link is visible or hidden.

false {boolean}, hides the link
 true {boolean}, shows the link

The workingLag field specifies the working-delay between linked-activities during the Items.SchedulePDM() method (exLinkPDMWorkingDelay). This property specifies the number of working-days between two linked bars.

null {null}, no lag between linked-activities
 2 {number}, indicates 2 working-days between linked-activities