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import React, { Component } from 'react'
const isIphone = (navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i))
const isIpad = (navigator.userAgent.match(/iPad/i))
const isAndroid = (navigator.userAgent.match(/Android/i))
const isMobile = isIphone || isIpad || isAndroid
const isDesktop = ! isMobile
function getFirstTouch(f) {
return (e) => f(e.touches[0])
}
export default class TickMarks extends Component {
constructor(props) {
super()
this.width = 45
this.height = window.innerHeight - 160
this.tag = ""
this.onTouchStart = this.onTouchStart.bind(this)
this.onTouchMove = this.onTouchMove.bind(this)
this.onTouchEnd = this.onTouchEnd.bind(this)
}
buildMarkers() {
this.yearTicks = []
this.years = []
const height = this.height
const width = this.width
const yPadding = fontStyle.fontSize
const heightRange = height - yPadding * 2
const startYear = 1800
const endYear = 2018
const yearStep = 10
const yearMarkerStep = 50
const yearDiff = endYear - startYear
for (let year = startYear; year <= endYear; year += yearStep) {
let y = (year - startYear) / yearDiff * heightRange + yPadding
let isMarker = (year % yearMarkerStep) == 0
let style = isMarker ? tickStyles.marker : tickStyles.year
this.yearTicks.push(
<line
key={'tick_' + year}
x1={width}
y1={y}
x2={width - style.width}
y2={y}
stroke={style.stroke}
strokeWidth={style.strokeWidth}
/>
)
if (isMarker) {
this.years.push(
<text
key={'label_' + year}
fontFamily="'Futura-Medium', sans-serif"
fill={fontStyle.fill}
fontSize={fontStyle.fontSize}
x={1}
y={y - fontStyle.yOffset}
textAnchor="start"
>{year}</text>
)
}
}
this.yearsByOffset = []
this.eventTicks = this.props.events.map((event, index) => {
if (event.date.match(/\D/)) {
return null
}
const year = parseInt(event.date)
const y = (year - startYear) / yearDiff * heightRange + yPadding
const style = tickStyles.event
if (year > 1800) {
this.yearsByOffset.push([y, Math.max(index-1, 0)])
}
return (
<line
key={'event_' + event.id.replace(/-/, '_')}
x1={width}
y1={y+1}
x2={width - style.width}
y2={y+1}
stroke={style.stroke}
strokeWidth={style.strokeWidth}
/>
)
}).filter(e => !!e)
}
scrollToYPosition(y) {
let index;
y -= this.svg.getBoundingClientRect().top
var foundOffset = this.yearsByOffset.some((pair) => {
if (y < pair[0]) {
index = pair[1]
return true
}
return false
})
if (foundOffset) {
this.props.scrollToIndex(index)
}
}
render() {
this.buildMarkers()
this.tag = this.props.tag
return (
<svg
style={styles.svg}
height={this.height}
width={this.width}
ref={(ref) => this.svg = ref}
>
{this.eventTicks}
{this.yearTicks}
{this.years}
</svg>
)
}
componentDidMount() {
if (isMobile) {
this.svg.addEventListener("touchstart", getFirstTouch(this.onTouchStart))
this.svg.addEventListener("touchmove", getFirstTouch(this.onTouchMove))
window.addEventListener("touchend", getFirstTouch(this.onTouchEnd))
}
else {
this.svg.addEventListener("mousedown", this.onTouchStart)
this.svg.addEventListener("mousemove", this.onTouchMove)
window.addEventListener("mouseup", this.onTouchEnd)
}
}
onTouchStart(e) {
this.dragging = true
this.scrollToYPosition(e.pageY)
}
onTouchMove(e) {
if (this.dragging || isMobile) {
this.scrollToYPosition(e.pageY)
}
}
onTouchEnd(e) {
this.dragging = false
}
}
const styles = {
svg: {
position: 'fixed',
top: 105,
left: '2%',
zIndex: 2,
},
}
const tickStyles = {
year: {
width: 4,
stroke: '#bbb',
strokeWidth: 1,
},
marker: {
width: 10,
stroke: '#888',
strokeWidth: 1
},
event: {
width: 10,
stroke: 'white',
strokeWidth: 2
},
}
const eventColors = {
'Surveillance': 'rgb(0,64,255)',
'Drones': 'rgb(255,0,0)',
'Facial Recognition': 'rgb(0,255,0)',
}
const fontStyle = {
fontSize: 12,
yOffset: -3,
fill: '#bbb',
}
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