Class LinkLabelOnPathDraggingTool

constructor

• new LinkLabelOnPathDraggingTool(init?: Partial<LinkLabelOnPathDraggingTool>): LinkLabelOnPathDraggingTool

• Constructs a LinkLabelOnPathDraggingTool and sets the name for the tool.

  Parameters

  • Optional init: Partial<LinkLabelOnPathDraggingTool>

  Returns LinkLabelOnPathDraggingTool

OverridecanStart

• canStart(): boolean

• This tool can only start if the mouse has moved enough so that it is not a click, and if the mouse down point is on a GraphObject "label" in a Link Panel, as determined by findLabel.

  Returns boolean

OverridedoActivate

• doActivate(): void

• Start a transaction, call findLabel and remember it as the "label" property, and remember the original values for the label's segment properties.

  Returns void

OverridedoCancel

• doCancel(): void

• Restore the label's original value for GraphObject.segment... properties.

  Returns void

OverridedoDeactivate

• doDeactivate(): void

• Stop any ongoing transaction.

  Returns void

OverridedoMouseMove

• doMouseMove(): void

• During the drag, call updateSegmentOffset in order to set the segment... properties of the label.

  Returns void

OverridedoMouseUp

• doMouseUp(): void

• At the end of the drag, update the segment properties of the label and finish the tool, completing a transaction.

  Returns void

OverridedoStop

• doStop(): void

• Clear any reference to a label element.

  Returns void

findLabel

• findLabel(): GraphObject

• From the GraphObject at the mouse point, search up the visual tree until we get to an object that has the "_isLinkLabel" property set to true and that is an immediate child of a Link Panel.

  Returns GraphObject

  This returns null if no such label is at the mouse down point.

updateSegmentOffset

• updateSegmentOffset(): void

• Save the label's go.GraphObject.segmentFraction at the closest point to the mouse.

  Returns void

label

: GraphObject