shimizu/.block

## .block
license: mit

## README.md

      
    Raw
  

              README.md
            
          
    Axis Tips #5
基準線をデータの内容に合わせて移動する。
青枠はドラッグしてサイズを変更することができます。

  
## index.html
<!DOCTYPE html>
<html lang="jp">
<head>
<style>
html, body {
    margin: 0px;
    padding: 0px;
    width: 100%;
    height: 100%;
}

#chart {
    width: 80%;
    height: 80%;
    border: 8px dashed gray;
    border-left: none;
    border-top:none;
    cursor:all-scroll;
}
#chart svg{
    width: 100%;
    height: 100%;
    cursor: default;
}

.grid .tick line {
    stroke-dasharray:1 4;
}

.axis .domain {
    stroke:red;
    stroke-width:3px;
}


.bar {
    stroke:gray;
    stroke-width:1;
    fill:skyblue;
}

</style>
<script src="//unpkg.com/babel-standalone@6.26.0/babel.min.js"></script>
<script src="//unpkg.com/d3@4.12.2/build/d3.min.js"></script>
</head>
<body>
<div id="chart">
    <svg></svg>
</div>


<script type="text/babel">
const Toggle = (...arg) =>{
    var key = arg;
    var l = key.length;
    var i = 0;
    return function(){
        if(l <= i) i=0;
        return key[i++];
    }
}

const keyGen  = Toggle("value1", "value2");

const data = [
    {title:"アメリカ", value1:80, value2:-21},
    {title:"日本", value1:40, value2:60},
    {title:"中国", value1:60, value2:-10},
]

const svg = d3.select("#chart").select("svg");
const grid = svg.append("g").classed("grid", true);
const plot = svg.append("g").classed("plot", true);
const axis = svg.append("g").classed("axis", true);
const yScale = d3.scaleBand().domain(data.map(d => d.title));
const xScale = d3.scaleLinear();

 // value1, value2 を交互に出力するトグル。
let valueKey = keyGen();

//3秒ごとに参照するキーを変えてチャートをアップデートする。
setInterval(function(){  valueKey = keyGen();render() }, 3000)

render();

function render(){

    const m = {top:30, left:110, right:30, bottom:30};
    const w = svg.node().clientWidth || svg.node().parentNode.clientWidth;
    const h = svg.node().clientHeight || svg.node().parentNode.clientHeight;
    const pw = w - (m.left + m.right);
    const ph = h - (m.top + m.bottom);

    const valueExtent = d3.extent(data, d => d[valueKey]).map( (d,i) =>{
        if(i==0 && d > 0) return 0;
        return d * 1.5;
    }) ;


    xScale.domain(valueExtent).nice();


    yScale.range([0, ph]).paddingInner(0.2);
    xScale.range([0, pw]);

    //axis layer
    axis.attr("transform", `translate(${m.left}, ${m.top})`);

    //y axis
    const yAxisUpdate = axis.selectAll(".yAxis").data([null]);
    const yAxisEnter = yAxisUpdate.enter().append("g").classed("yAxis", true);

    const yAxis = yAxisUpdate.merge(yAxisEnter).call( d3.axisLeft().scale(yScale).tickSizeOuter(0) );

    yAxis.selectAll(".tick line").remove();

    yAxis.select(".domain")
        .attr("transform", `translate(${xScale(0)}, 0)`); //ベースラインを0の位置へ移動する

    //x axis
    const xAxisUpdate = axis.selectAll(".xAxis").data([null]);
    const xAxisEnter = xAxisUpdate.enter().append("g").classed("xAxis", true);

    const renderAxis =  d3.axisBottom().scale(xScale);

    const xAxis = xAxisUpdate.merge(xAxisEnter).call(renderAxis)
        .attr("transform", `translate(0, ${ph})`);

    xAxis.select(".domain").remove();
    xAxis.selectAll(".tick line").remove();


    //grid layer
    grid.attr("transform", `translate(${m.left}, ${m.top})`);


    //x grid
    const xGridUpdate = grid.selectAll(".xGrid").data([null]);
    const xGridEnter = xGridUpdate.enter().append("g").classed("xGrid", true);

    const xGrid = xGridUpdate.merge(xGridEnter)
        .call( d3.axisBottom().scale(xScale).tickSizeInner(-ph).tickFormat(() => null ) )
        .attr("transform", `translate(0, ${ph})`);

    xGrid.select(".domain").remove();


   //plot layer
    plot.attr("transform", `translate(${m.left}, ${m.top})`);

    //bar
    const barsUpdate = plot.selectAll(".bar").data(data);
    const barsEnter = barsUpdate.enter().append("rect").classed("bar", true);

    const bars = barsUpdate.merge(barsEnter)
        .attr("height", yScale.bandwidth())
        .attr("width", d => Math.abs(xScale(d[valueKey]) - xScale(0)) )
        .attr("y", d => yScale(d.title) )
        .attr("x", d => xScale( Math.min(0, d[valueKey])) )
        ;
}


//divエレメントをドラッグでリサイズできるようにする。
const dispatch = d3.dispatch("resize");
dispatch.on("resize", render);
setResizeControler();


function setResizeControler(){
    const drag = d3.drag()
        .on("drag", resized)

    d3.select("#chart")
        .call(drag);

    function resized(e){
        const s = d3.event.sourceEvent;
        const w = (s.pageX < 300) ? 300 : s.pageX;
        const h = (s.pageY < 200) ? 200 : s.pageY;

        d3.select(this)
            .style("width", `${w}px`)
            .style("height", `${h}px`)
            .attr("data-test", "test")

        dispatch.call("resize");

    }

}
</script>


</body>
</html>

## thumbnail.png

      
    Raw
  

              thumbnail.png
	<!DOCTYPE html>
	<html lang="jp">
	<head>
	<style>
	html, body {
	margin: 0px;
	padding: 0px;
	width: 100%;
	height: 100%;
	}

	#chart {
	width: 80%;
	height: 80%;
	border: 8px dashed gray;
	border-left: none;
	border-top:none;
	cursor:all-scroll;
	}
	#chart svg{
	width: 100%;
	height: 100%;
	cursor: default;
	}

	.grid .tick line {
	stroke-dasharray:1 4;
	}

	.axis .domain {
	stroke:red;
	stroke-width:3px;
	}


	.bar {
	stroke:gray;
	stroke-width:1;
	fill:skyblue;
	}

	</style>
	<script src="//unpkg.com/babel-standalone@6.26.0/babel.min.js"></script>
	<script src="//unpkg.com/d3@4.12.2/build/d3.min.js"></script>
	</head>
	<body>
	<div id="chart">
	<svg></svg>
	</div>



	<script type="text/babel">
	const Toggle = (...arg) =>{
	var key = arg;
	var l = key.length;
	var i = 0;
	return function(){
	if(l <= i) i=0;
	return key[i++];
	}
	}

	const keyGen = Toggle("value1", "value2");

	const data = [
	{title:"アメリカ", value1:80, value2:-21},
	{title:"日本", value1:40, value2:60},
	{title:"中国", value1:60, value2:-10},
	]

	const svg = d3.select("#chart").select("svg");
	const grid = svg.append("g").classed("grid", true);
	const plot = svg.append("g").classed("plot", true);
	const axis = svg.append("g").classed("axis", true);
	const yScale = d3.scaleBand().domain(data.map(d => d.title));
	const xScale = d3.scaleLinear();

	// value1, value2 を交互に出力するトグル。
	let valueKey = keyGen();

	//3秒ごとに参照するキーを変えてチャートをアップデートする。
	setInterval(function(){ valueKey = keyGen();render() }, 3000)

	render();

	function render(){

	const m = {top:30, left:110, right:30, bottom:30};
	const w = svg.node().clientWidth \|\| svg.node().parentNode.clientWidth;
	const h = svg.node().clientHeight \|\| svg.node().parentNode.clientHeight;
	const pw = w - (m.left + m.right);
	const ph = h - (m.top + m.bottom);

	const valueExtent = d3.extent(data, d => d[valueKey]).map( (d,i) =>{
	if(i==0 && d > 0) return 0;
	return d * 1.5;
	}) ;


	xScale.domain(valueExtent).nice();


	yScale.range([0, ph]).paddingInner(0.2);
	xScale.range([0, pw]);

	//axis layer
	axis.attr("transform", `translate(${m.left}, ${m.top})`);

	//y axis
	const yAxisUpdate = axis.selectAll(".yAxis").data([null]);
	const yAxisEnter = yAxisUpdate.enter().append("g").classed("yAxis", true);

	const yAxis = yAxisUpdate.merge(yAxisEnter).call( d3.axisLeft().scale(yScale).tickSizeOuter(0) );

	yAxis.selectAll(".tick line").remove();

	yAxis.select(".domain")
	.attr("transform", `translate(${xScale(0)}, 0)`); //ベースラインを0の位置へ移動する

	//x axis
	const xAxisUpdate = axis.selectAll(".xAxis").data([null]);
	const xAxisEnter = xAxisUpdate.enter().append("g").classed("xAxis", true);

	const renderAxis = d3.axisBottom().scale(xScale);

	const xAxis = xAxisUpdate.merge(xAxisEnter).call(renderAxis)
	.attr("transform", `translate(0, ${ph})`);

	xAxis.select(".domain").remove();
	xAxis.selectAll(".tick line").remove();


	//grid layer
	grid.attr("transform", `translate(${m.left}, ${m.top})`);


	//x grid
	const xGridUpdate = grid.selectAll(".xGrid").data([null]);
	const xGridEnter = xGridUpdate.enter().append("g").classed("xGrid", true);

	const xGrid = xGridUpdate.merge(xGridEnter)
	.call( d3.axisBottom().scale(xScale).tickSizeInner(-ph).tickFormat(() => null ) )
	.attr("transform", `translate(0, ${ph})`);

	xGrid.select(".domain").remove();



	//plot layer
	plot.attr("transform", `translate(${m.left}, ${m.top})`);

	//bar
	const barsUpdate = plot.selectAll(".bar").data(data);
	const barsEnter = barsUpdate.enter().append("rect").classed("bar", true);

	const bars = barsUpdate.merge(barsEnter)
	.attr("height", yScale.bandwidth())
	.attr("width", d => Math.abs(xScale(d[valueKey]) - xScale(0)) )
	.attr("y", d => yScale(d.title) )
	.attr("x", d => xScale( Math.min(0, d[valueKey])) )
	;
	}


	//divエレメントをドラッグでリサイズできるようにする。
	const dispatch = d3.dispatch("resize");
	dispatch.on("resize", render);
	setResizeControler();


	function setResizeControler(){
	const drag = d3.drag()
	.on("drag", resized)

	d3.select("#chart")
	.call(drag);

	function resized(e){
	const s = d3.event.sourceEvent;
	const w = (s.pageX < 300) ? 300 : s.pageX;
	const h = (s.pageY < 200) ? 200 : s.pageY;

	d3.select(this)
	.style("width", `${w}px`)
	.style("height", `${h}px`)
	.attr("data-test", "test")

	dispatch.call("resize");

	}

	}
	</script>


	</body>
	</html>
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