jonchurch/README.md

## README.md

      
    Raw
  

              README.md
            
          
    Interactive support and resistance line rendering on a chart. Illustrating setting start end
end points and horizontal line at full width.

  
## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>

    body {
        font: 10px sans-serif;
    }

    text {
        fill: #000;
    }

    button {
        position: absolute;
        right: 20px;
        top: 440px;
        display: none;
    }

    path.candle {
        stroke: #000000;
    }

    path.candle.body {
        stroke-width: 0;
    }

    path.candle.up {
        fill: #00AA00;
        stroke: #00AA00;
    }

    path.candle.down {
        fill: #FF0000;
        stroke: #FF0000;
    }

    .supstance path {
        stroke: blue;
        stroke-width: 0.8;
        stroke-dasharray: 2, 2;
    }

    .mouseover .supstance path {
        stroke-width: 1.5;
    }

    .axisannotation path {
        fill: blue;
    }

    .axisannotation text {
        fill: #fff;
    }

    .dragging .supstance path {
        stroke: darkblue;
    }

    .interaction path {
        pointer-events: all;
        cursor: ns-resize;
        stroke: blue;
        stroke-width: 1;
    }

</style>
<body>
<button>Update</button>
<script src="http://d3js.org/d3.v4.min.js"></script>
<script src="http://techanjs.org/techan.min.js"></script>
<script>

    var margin = {top: 20, right: 20, bottom: 30, left: 50},
            width = 960 - margin.left - margin.right,
            height = 500 - margin.top - margin.bottom;

    var parseDate = d3.timeParse("%d-%b-%y"),
        valueFormat = d3.format(',.2f');

    var x = techan.scale.financetime()
            .range([0, width]);

    var y = d3.scaleLinear()
            .range([height, 0]);

    var percent = y.copy();

    var candlestick = techan.plot.candlestick()
            .xScale(x)
            .yScale(y);

    var xAxis = d3.axisBottom(x);

    var yAxis = d3.axisLeft(y);

    var percentAxis = d3.axisRight(percent);

    var ohlcAnnotation = techan.plot.axisannotation()
            .axis(yAxis)
            .orient('left')
            .format(d3.format(',.2f'));

    var percentAnnotation = techan.plot.axisannotation()
            .axis(percentAxis)
            .orient('right')
            .format(d3.format('+.1%'));

    var supstance = techan.plot.supstance()
            .xScale(x)
            .yScale(y)
            .annotation([ohlcAnnotation, percentAnnotation])
            .on("mouseenter", enter)
            .on("mouseout", out)
            .on("drag", drag);

    var svg = d3.select("body").append("svg")
            .attr("width", width + margin.left + margin.right)
            .attr("height", height + margin.top + margin.bottom);

    var defs = svg.append("defs");

    defs.append("clipPath")
            .attr("id", "ohlcClip")
        .append("rect")
            .attr("x", 0)
            .attr("y", 0)
            .attr("width", width)
            .attr("height", height);

    defs.append("clipPath")
            .attr("id", "supstanceClip")
        .append("rect")
            .attr("x", -margin.left)
            .attr("y", 0)
            .attr("width", width+margin.left)
            .attr("height", height);

    svg = svg.append("g")
            .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

    var valueText = svg.append('text')
            .style("text-anchor", "end")
            .attr("class", "coords")
            .attr("x", width - 5)
            .attr("y", 15);

    fetch('https://min-api.cryptocompare.com/data/histohour?fsym=BTC&tsym=USD&limit=24&aggregate=1', function(err, res) {
        if (err) console.log({err})
        if (res && res.body) {
            console.log('RES BODY:', res.body)
        }
    })
    d3.csv("data.csv", function(error, data) {
        var accessor = candlestick.accessor();

        data = data.slice(0, 200).map(function(d) {
            return {
                date: parseDate(d.Date),
                open: +d.Open,
                high: +d.High,
                low: +d.Low,
                close: +d.Close,
                volume: +d.Volume
            };
        }).sort(function(a, b) { return d3.ascending(accessor.d(a), accessor.d(b)); });

        var supstanceData = [
            { value: 63.64 },
            { start: new Date(2013, 11, 10), end: new Date(2014, 4, 12), value: 55.50 },
            { start: new Date(2013, 8, 16), end: new Date(2013, 11, 24), value: 51.53 }
        ];

        svg.append("g")
                .attr("class", "x axis")
                .attr("transform", "translate(0," + height + ")");

        svg.append("g")
                .attr("class", "y axis")
            .append("text")
                .attr("transform", "rotate(-90)")
                .attr("y", 6)
                .attr("dy", ".71em")
                .style("text-anchor", "end")
                .text("Price ($)");

        svg.append("g")
                .attr("class", "candlestick");

        svg.append("g")
                .attr("class", "supstances")
                .attr("clip-path", "url(#supstanceClip)");

        // Data to display initially
        draw(data.slice(0, data.length-20), supstanceData.slice(0, supstanceData.length-1));
        // Only want this button to be active if the data has loaded
        d3.select("button").on("click", function() { draw(data, supstanceData); }).style("display", "inline");
    });

    function draw(data, supstanceData) {
        x.domain(data.map(candlestick.accessor().d));
        y.domain(techan.scale.plot.ohlc(data, candlestick.accessor()).domain());
        percent.domain(techan.scale.plot.percent(y, candlestick.accessor()(data[0])).domain());

        svg.selectAll("g.candlestick").datum(data).call(candlestick);
        svg.selectAll("g.x.axis").call(xAxis);
        svg.selectAll("g.y.axis").call(yAxis);
        svg.selectAll("g.supstances").datum(supstanceData).call(supstance).call(supstance.drag);
    }

    function enter(d) {
        valueText.style("display", "inline");
        refreshText(d);
    }

    function out() {
        valueText.style("display", "none");
    }

    function drag(d) {
        refreshText(d);
    }

    function refreshText(d) {
        valueText.text("Value: " + valueFormat(d.value));
    }

</script>
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	body {
	font: 10px sans-serif;
	}

	text {
	fill: #000;
	}

	button {
	position: absolute;
	right: 20px;
	top: 440px;
	display: none;
	}

	path.candle {
	stroke: #000000;
	}

	path.candle.body {
	stroke-width: 0;
	}

	path.candle.up {
	fill: #00AA00;
	stroke: #00AA00;
	}

	path.candle.down {
	fill: #FF0000;
	stroke: #FF0000;
	}

	.supstance path {
	stroke: blue;
	stroke-width: 0.8;
	stroke-dasharray: 2, 2;
	}

	.mouseover .supstance path {
	stroke-width: 1.5;
	}

	.axisannotation path {
	fill: blue;
	}

	.axisannotation text {
	fill: #fff;
	}

	.dragging .supstance path {
	stroke: darkblue;
	}

	.interaction path {
	pointer-events: all;
	cursor: ns-resize;
	stroke: blue;
	stroke-width: 1;
	}

	</style>
	<body>
	<button>Update</button>
	<script src="http://d3js.org/d3.v4.min.js"></script>
	<script src="http://techanjs.org/techan.min.js"></script>
	<script>

	var margin = {top: 20, right: 20, bottom: 30, left: 50},
	width = 960 - margin.left - margin.right,
	height = 500 - margin.top - margin.bottom;

	var parseDate = d3.timeParse("%d-%b-%y"),
	valueFormat = d3.format(',.2f');

	var x = techan.scale.financetime()
	.range([0, width]);

	var y = d3.scaleLinear()
	.range([height, 0]);

	var percent = y.copy();

	var candlestick = techan.plot.candlestick()
	.xScale(x)
	.yScale(y);

	var xAxis = d3.axisBottom(x);

	var yAxis = d3.axisLeft(y);

	var percentAxis = d3.axisRight(percent);

	var ohlcAnnotation = techan.plot.axisannotation()
	.axis(yAxis)
	.orient('left')
	.format(d3.format(',.2f'));

	var percentAnnotation = techan.plot.axisannotation()
	.axis(percentAxis)
	.orient('right')
	.format(d3.format('+.1%'));

	var supstance = techan.plot.supstance()
	.xScale(x)
	.yScale(y)
	.annotation([ohlcAnnotation, percentAnnotation])
	.on("mouseenter", enter)
	.on("mouseout", out)
	.on("drag", drag);

	var svg = d3.select("body").append("svg")
	.attr("width", width + margin.left + margin.right)
	.attr("height", height + margin.top + margin.bottom);

	var defs = svg.append("defs");

	defs.append("clipPath")
	.attr("id", "ohlcClip")
	.append("rect")
	.attr("x", 0)
	.attr("y", 0)
	.attr("width", width)
	.attr("height", height);

	defs.append("clipPath")
	.attr("id", "supstanceClip")
	.append("rect")
	.attr("x", -margin.left)
	.attr("y", 0)
	.attr("width", width+margin.left)
	.attr("height", height);

	svg = svg.append("g")
	.attr("transform", "translate(" + margin.left + "," + margin.top + ")");

	var valueText = svg.append('text')
	.style("text-anchor", "end")
	.attr("class", "coords")
	.attr("x", width - 5)
	.attr("y", 15);

	fetch('https://min-api.cryptocompare.com/data/histohour?fsym=BTC&tsym=USD&limit=24&aggregate=1', function(err, res) {
	if (err) console.log({err})
	if (res && res.body) {
	console.log('RES BODY:', res.body)
	}
	})
	d3.csv("data.csv", function(error, data) {
	var accessor = candlestick.accessor();

	data = data.slice(0, 200).map(function(d) {
	return {
	date: parseDate(d.Date),
	open: +d.Open,
	high: +d.High,
	low: +d.Low,
	close: +d.Close,
	volume: +d.Volume
	};
	}).sort(function(a, b) { return d3.ascending(accessor.d(a), accessor.d(b)); });

	var supstanceData = [
	{ value: 63.64 },
	{ start: new Date(2013, 11, 10), end: new Date(2014, 4, 12), value: 55.50 },
	{ start: new Date(2013, 8, 16), end: new Date(2013, 11, 24), value: 51.53 }
	];

	svg.append("g")
	.attr("class", "x axis")
	.attr("transform", "translate(0," + height + ")");

	svg.append("g")
	.attr("class", "y axis")
	.append("text")
	.attr("transform", "rotate(-90)")
	.attr("y", 6)
	.attr("dy", ".71em")
	.style("text-anchor", "end")
	.text("Price ($)");

	svg.append("g")
	.attr("class", "candlestick");

	svg.append("g")
	.attr("class", "supstances")
	.attr("clip-path", "url(#supstanceClip)");

	// Data to display initially
	draw(data.slice(0, data.length-20), supstanceData.slice(0, supstanceData.length-1));
	// Only want this button to be active if the data has loaded
	d3.select("button").on("click", function() { draw(data, supstanceData); }).style("display", "inline");
	});

	function draw(data, supstanceData) {
	x.domain(data.map(candlestick.accessor().d));
	y.domain(techan.scale.plot.ohlc(data, candlestick.accessor()).domain());
	percent.domain(techan.scale.plot.percent(y, candlestick.accessor()(data[0])).domain());

	svg.selectAll("g.candlestick").datum(data).call(candlestick);
	svg.selectAll("g.x.axis").call(xAxis);
	svg.selectAll("g.y.axis").call(yAxis);
	svg.selectAll("g.supstances").datum(supstanceData).call(supstance).call(supstance.drag);
	}

	function enter(d) {
	valueText.style("display", "inline");
	refreshText(d);
	}

	function out() {
	valueText.style("display", "none");
	}

	function drag(d) {
	refreshText(d);
	}

	function refreshText(d) {
	valueText.text("Value: " + valueFormat(d.value));
	}

	</script>