merge

1 files changed, 192 insertions, 0 deletions

diff --git a/client/src/lib/timeline/tickMarks.js b/client/src/lib/timeline/tickMarks.js
new file mode 100644
index 0000000..c8bda29
--- /dev/null
+++ b/client/src/lib/timeline/tickMarks.js
@@ -0,0 +1,192 @@
+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"
+              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',
+}