Created
June 2, 2019 00:12
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SVG Editor
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| <div id="app"></div> |
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| const examples = [ | |
| { | |
| name: 'Target', | |
| content: ` | |
| <svg width="256px" height="256px"> | |
| <g> | |
| <circle cx="50%" cy="50%" r="75%" fill="white"/> | |
| <circle cx="50%" cy="50%" r="70%" fill="red"/> | |
| <circle cx="50%" cy="50%" r="65%" fill="white"/> | |
| <circle cx="50%" cy="50%" r="60%" fill="red"/> | |
| <circle cx="50%" cy="50%" r="55%" fill="white"/> | |
| <circle cx="50%" cy="50%" r="50%" fill="red"/> | |
| <circle cx="50%" cy="50%" r="45%" fill="white"/> | |
| <circle cx="50%" cy="50%" r="40%" fill="red"/> | |
| <circle cx="50%" cy="50%" r="35%" fill="white"/> | |
| <circle cx="50%" cy="50%" r="30%" fill="red"/> | |
| <circle cx="50%" cy="50%" r="25%" fill="white" /> | |
| <circle cx="50%" cy="50%" r="20%" fill="red" /> | |
| <circle cx="50%" cy="50%" r="15%" fill="white" /> | |
| <circle cx="50%" cy="50%" r="10%" fill="red" /> | |
| <circle cx="50%" cy="50%" r="5%" fill="white" /> | |
| </g> | |
| </svg> | |
| ` | |
| }, | |
| { | |
| name: 'Rainbow Circle', | |
| content: ` | |
| <svg width="256px" height="256px"> | |
| <g> | |
| <circle cx="50%" cy="50%" r="70%" fill="red"/> | |
| <circle cx="50%" cy="50%" r="65%" fill="orange"/> | |
| <circle cx="50%" cy="50%" r="60%" fill="yellow"/> | |
| <circle cx="50%" cy="50%" r="55%" fill="green"/> | |
| <circle cx="50%" cy="50%" r="50%" fill="blue"/> | |
| <circle cx="50%" cy="50%" r="45%" fill="indigo"/> | |
| <circle cx="50%" cy="50%" r="40%" fill="violet"/> | |
| <circle cx="50%" cy="50%" r="35%" fill="red"/> | |
| <circle cx="50%" cy="50%" r="30%" fill="orange"/> | |
| <circle cx="50%" cy="50%" r="25%" fill="yellow"/> | |
| <circle cx="50%" cy="50%" r="20%" fill="green" /> | |
| <circle cx="50%" cy="50%" r="15%" fill="blue" /> | |
| <circle cx="50%" cy="50%" r="10%" fill="indigo" /> | |
| <circle cx="50%" cy="50%" r="5%" fill="violet" /> | |
| <circle cx="50%" cy="50%" r="1%" fill="red" /> | |
| </g> | |
| </svg> | |
| ` | |
| } | |
| ]; | |
| function debounce(func, ms) { | |
| let timeout; | |
| return function _debounced(...args) { | |
| clearTimeout(timeout); | |
| timeout = setTimeout(func, ms, ...args); | |
| }; | |
| } | |
| class SVGEditor extends React.Component { | |
| constructor(props) { | |
| super(props); | |
| this.state = { | |
| pendingXML: "", | |
| xml: "" | |
| }; | |
| this._ref = React.createRef(); | |
| this.handleInput = this.handleInput.bind(this); | |
| this.applyPendingXML = debounce(this.applyPendingXML.bind(this), 400); | |
| } | |
| componentDidUpdate(prevProps, prevState) { | |
| if (prevState.xml !== this.state.xml) { | |
| try { | |
| this._ref.current.innerHTML = this.state.xml; | |
| } catch (err) { | |
| switch (true) { | |
| case err instanceof SyntaxError: | |
| case err instanceof NoModificationAllowedError: | |
| break; | |
| default: | |
| throw err; | |
| } | |
| } | |
| } | |
| } | |
| render() { | |
| return ( | |
| <div> | |
| <h1>SVG Editor</h1> | |
| <div> | |
| <ul className="examples"> | |
| {examples.map((example, idx) => { | |
| const showExample = () => { | |
| this.setState({ | |
| pendingXML: example.content.trim(), | |
| xml: example.content.trim() | |
| }); | |
| } | |
| return ( | |
| <li key="example{idx}"><a className="link" onClick={showExample}>Example {idx+1}: {example.name}</a></li> | |
| ); | |
| })} | |
| </ul> | |
| </div> | |
| <div> | |
| <h2>Input</h2> | |
| <textarea id="inputArea" onChange={this.handleInput} value={this.state.pendingXML}/> | |
| </div> | |
| <div> | |
| <h2>Output</h2> | |
| <div id="outputArea" className="output" ref={this._ref} /> | |
| </div> | |
| </div> | |
| ); | |
| } | |
| handleInput(e) { | |
| this.setState({ pendingXML: e.target.value }, () => this.applyPendingXML()); | |
| } | |
| applyPendingXML() { | |
| this.setState((state, props) => { | |
| return { xml: state.pendingXML }; | |
| }); | |
| } | |
| } | |
| ReactDOM.render(<SVGEditor />, document.getElementById("app")); |
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| <script src="https://unpkg.com/react@16.5.2/umd/react.development.js"></script> | |
| <script src="https://unpkg.com/react-dom@16.5.2/umd/react-dom.development.js"></script> |
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| #inputArea { | |
| min-width: 60vw; | |
| min-height: 30vh; | |
| } | |
| #outputArea { | |
| min-width: 60vw; | |
| min-height: 30vh; | |
| } | |
| a.link { | |
| color: blue; | |
| } | |
| a.link:hover { | |
| text-decoration: underline; | |
| cursor: pointer; | |
| } | |
| a.link:active { | |
| text-decoration: underline; | |
| } | |
| ol.examples, ul.examples { | |
| list-style-type: none; | |
| padding: 0px; | |
| } |
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