Learn how to transform the default arrows in vis.js into quirky chicken feet or elegant cardinality symbols

I'm exploring the possibility of using vis.js to visually represent the structure of an XML or JSON Schema. Instead of arrows, I want to display cardinality information.

Does anyone have recommendations for documentation that can help me with this? I've been unsuccessful in finding any resources so far.

Thank you, Loren

Answer №1

In this code snippet, each edge is equipped with a function called drawArrows that is responsible for drawing arrows. This function can be customized to redefine its behavior:

edge.drawArrows = function drawArrows(ctx, arrowData) {
    if (this.options.arrows.from.enabled === true) {
      drawArrowCircle(ctx, this.selected, this.hover, arrowData.from);
    }
    if (this.options.arrows.middle.enabled === true) {
      drawArrowDiamond(ctx, this.selected, this.hover, arrowData.middle);
    }
    if (this.options.arrows.to.enabled === true) {
      this.edgeType.drawArrowHead(ctx, this.selected, this.hover, arrowData.to);
    }
  }

Check out the example on JSFiddle: https://jsfiddle.net/ct34zwn6/

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