react-path-tooltip

A simple react tooltip component for SVG paths, also known as SVGElements.

The component detects the visual context, such as SVG size, path relative location and size, and the display size needed for the text, and calculates an optimal orientation and rendering approach. See the sample below for better explanation.

Demo

See the code for this simple example here.

Install

In order to install, run the following command:

$ npm install react-path-tooltip --save

Usage

A very simple `App.tsx' example:

import React from "react"
import "./App.css"
import { PathTooltip } from "ReactPathTooltip" // import the package

function App() {

  const svgRef = React.createRef<SVGSVGElement>()
  const pathRef = React.createRef<SVGCircleElement>()

  return (
    < div className="App" >
      < div className="Main">
        <svg width="400" height="400" ref={svgRef}>
          <circle cx={50} cy={50} r={50} fill="red" ref={pathRef} />
          <PathTooltip svgRef={svgRef} pathRef={pathRef} tip="Hello World!" />
        </svg>
      </div>
    </div>
  )
}

export default App

Customization

The following parameters are passed to the tooltip component:

Prop	Type	Description
tip	string	Mandatory. The text to be displayed inside the tooltip. Must include simple text. No new lines, or html decoration
svgRef	React.RefObject	Mandatory. A React reference object to the SVG element
pathRef	React.RefObject	Mandatory. A React reference object to the path element bounded to the tooltip. Must be a valid reference to a path element. There are a number of such types such as SVGRectElement, SVGCircleElement, etc
bgColor	string	Optional. Background color. Default: "black"
textColor	string	Optional. Text color. Default: "white"
fontFamily	string	Optional. The font family. Default: san-serif
fontSize	number	Optional. The font size. Default 12

Notes

• When using the tooltip, make sure that the SVG elements are located in the code above the tooltip elements. The reason: In SVG, the rendering order is based on the document order. I.e. the first elements in the SVG document fragment getting "painted" first. Subsequent elements are painted on top of previously painted elements. Thus the order of elements is important to avoid issues with path elements rendered on top of tooltips.
• If the tooltip text is too long, then the tooltip controller will automatically wrap the text across multiple lines.

License

MIT