110 lines
2.5 KiB
JavaScript
110 lines
2.5 KiB
JavaScript
import React from 'react';
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import style from './style';
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import utils from '../../utils';
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class Hand extends React.Component {
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static propTypes = {
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className: React.PropTypes.string,
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angle: React.PropTypes.number,
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onMove: React.PropTypes.func,
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onMoved: React.PropTypes.func
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};
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static defaultProps = {
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className: '',
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angle: 0,
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length: 0,
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origin: {}
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};
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state = {
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knobWidth: 0
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};
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componentDidMount () {
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this.setState({knobWidth: this.refs.knob.offsetWidth});
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}
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getMouseEventMap () {
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return {
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mousemove: this.handleMouseMove,
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mouseup: this.handleMouseUp
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};
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}
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getTouchEventMap () {
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return {
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touchmove: this.handleTouchMove,
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touchend: this.handleTouchEnd
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};
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}
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handleMouseMove = (event) => {
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this.move(utils.events.getMousePosition(event));
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};
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handleTouchMove = (event) => {
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this.move(utils.events.getTouchPosition(event));
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};
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handleMouseUp = () => {
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this.end(this.getMouseEventMap());
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};
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handleTouchEnd = () => {
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this.end(this.getTouchEventMap());
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};
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mouseStart (event) {
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utils.events.addEventsToDocument(this.getMouseEventMap());
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this.move(utils.events.getMousePosition(event));
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}
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touchStart (event) {
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utils.events.addEventsToDocument(this.getTouchEventMap());
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this.move(utils.events.getTouchPosition(event));
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utils.events.pauseEvent(event);
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}
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getPositionRadius (position) {
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let x = this.props.origin.x - position.x;
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let y = this.props.origin.y - position.y;
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return Math.sqrt(x * x + y * y);
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}
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trimAngleToValue (angle) {
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return this.props.step * Math.round(angle / this.props.step);
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}
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positionToAngle (position) {
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return utils.angle360FromPositions(this.props.origin.x, this.props.origin.y, position.x, position.y);
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}
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end (events) {
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if (this.props.onMoved) this.props.onMoved();
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utils.events.removeEventsFromDocument(events);
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}
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move (position) {
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let degrees = this.trimAngleToValue(this.positionToAngle(position));
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let radius = this.getPositionRadius(position);
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if (this.props.onMove) this.props.onMove(degrees === 360 ? 0 : degrees, radius);
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}
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render () {
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const className = `${style.hand} ${this.props.className}`;
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let handStyle = utils.prefixer({
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height: this.props.length - this.state.knobWidth / 2,
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transform: `rotate(${this.props.angle}deg)`
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});
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return (
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<div className={className} style={handStyle}>
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<div ref='knob' className={style.knob}></div>
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</div>
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);
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}
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}
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export default Hand;
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