joint.dia.LinkView is the view for the joint.dia.Link model or any of its inheritants. It inherits from the Backbone View. joint.dia.LinkView is responsible for rendering a link with properties defined in its model into the paper. joint.dia.LinkView takes care of handling pointer events.

It is possible to use custom link view for all your links in the paper. This can be set up via the linkView option on the paper object. There is couple of options that you can use when you inherit from joint.dia.LinkView and decide to use your own link view instead. These option are:

• shortLinkLength - when link gets shorter than the length specified, the link view will automatically scale down the link tools by half. It defaults to 40.
• doubleLinkTools - sometimes when links overlap each other, the link tools stack one over the other making it impossible to reach the ones below the top one. By setting doubleLinkTools to true, you can force the link view to create a copy of the link tools and position it on the other end of the link. Note that this happens only if the link gets longer than longLinkLength.
• longLinkLength - when link gets longer than the length specified and doubleLinkTools is set to true, a copy of the link tools will be rendered on the other end of the link.
• linkToolsOffset - the offset of the link tools from the beginning of the link. It defaults to 40.
• doubleLinkToolsOffset - the offset of the copy of the link tools from the end of the link. It defaults to 60. This makes only sense if doubleLinkTools is set to true.

Example:

var paper = new joint.dia.Paper({
    // ...
    linkView: joint.dia.LinkView.extend({
        options: _.defaults({
            doubleLinkTools: true
        }, joint.dia.LinkView.prototype.options)
    }),
    // ...
});