Class CurvedLinkReshapingTool

GoJS® Diagramming Components
version 3.0.2
by Northwoods Software®

This is an extension and not part of the main GoJS library. Note that the API for this class may change at any time. If you intend to use an extension in production, you should copy the code to your own source directory. See the Extensions intro page for more information.


This CurvedLinkReshapingTool class allows for a go.Link's path to be modified by the user via the dragging of a single tool handle at the middle of the link. Dragging the handle changes the value of go.Link.curviness.

If you want to experiment with this extension, try the Curved Link Reshaping sample.




  • Start reshaping, if findToolHandleAt finds a reshape handle at the mouse down point.

    If successful this sets handle to be the reshape handle that it finds and adornedLink to be the go.Link being routed. It also remembers the original link route (a list of Points) and curviness in case this tool is cancelled. And it starts a transaction.

    Returns void

  • Restore the link route to be the original points and curviness and stop this tool.

    Returns void

  • Change the route of the adornedLink by moving the point corresponding to the current handle to be at the given go.Point. This is called by doMouseMove and doMouseUp with the result of calling computeReshape to constrain the input point.


    Returns void