wrobstory/README.md

## README.md

      
    Raw
  

              README.md
            
          
    Example for Cooperative Brushing and Tooltips in D3.
The completed chart, with both tooltips and brushing working cooperatively. You can start a brush-zoom on either the background or a data point.

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

.point {
  fill: #2f225d;
  stroke: #afa2dc;
}

.selected {
  fill: #afa2dc;
  stroke: #2f225d;
}

.axis {
  font: 10px sans-serif;
}

p {
  font: 12px sans-serif;
  margin: 0 0 2px 0;
  padding: 0;
}

.clear-button {
  font: 14px sans-serif;
  cursor: pointer;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.brush .extent {
  stroke: #fff;
  fill-opacity: .125;
  shape-rendering: crispEdges;
}

</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
d3.helper = {};

d3.helper.tooltip = function(){
    var tooltipDiv;
    var bodyNode = d3.select('body').node();

    function tooltip(selection){

        selection.on('mouseover.tooltip', function(pD, pI){
            // Clean up lost tooltips
            d3.select('body').selectAll('div.tooltip').remove();
            // Append tooltip
            tooltipDiv = d3.select('body')
                           .append('div')
                           .attr('class', 'tooltip')
            var absoluteMousePos = d3.mouse(bodyNode);
            tooltipDiv.style({
                left: (absoluteMousePos[0] + 10)+'px',
                top: (absoluteMousePos[1] - 40)+'px',
                'background-color': '#d8d5e4',
                width: '65px',
                height: '30px',
                padding: '5px',
                position: 'absolute',
                'z-index': 1001,
                'box-shadow': '0 1px 2px 0 #656565'
            });

            var first_line = '<p>X-Value: ' + pD.index + '</p>'
            var second_line = '<p>Y-Value: ' + pD.value + '</p>'

            tooltipDiv.html(first_line + second_line)
        })
        .on('mousemove.tooltip', function(pD, pI){
            // Move tooltip
            var absoluteMousePos = d3.mouse(bodyNode);
            tooltipDiv.style({
                left: (absoluteMousePos[0] + 10)+'px',
                top: (absoluteMousePos[1] - 40)+'px'
            });
        })
        .on('mouseout.tooltip', function(pD, pI){
            // Remove tooltip
            tooltipDiv.remove();
        });

    }

    tooltip.attr = function(_x){
        if (!arguments.length) return attrs;
        attrs = _x;
        return this;
    };

    tooltip.style = function(_x){
        if (!arguments.length) return styles;
        styles = _x;
        return this;
    };

    return tooltip;
};

var data = [];
var values = [];
for (var i = 2; i <= 50; i++) {
    var val = Math.floor(Math.random() * (50 - 5 + 1) + 5);
    data.push({index: i, value: val});
    values.push(val);
}

var margin = {top: 20, right: 20, bottom: 60, left: 40},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var x = d3.scale.linear()
    .range([0, width])
    .domain([0, 50]);

var y = d3.scale.linear()
    .range([height, 0])
    .domain([0, d3.max(values) + 5]);

var brush = d3.svg.brush()
    .x(x)
    .on("brush", brushmove)
    .on("brushend", brushend);

var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom");

var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left")
    .ticks(11);

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

svg.append("g")
    .attr("class", "x axis")
    .attr("clip-path", "url(#clip)")
    .attr("transform", "translate(0," + height + ")")
    .call(xAxis);

svg.append("g")
    .attr("class", "y axis")
    .call(yAxis);

svg.append("g")
    .attr("class", "brush")
    .call(brush)
  .selectAll('rect')
    .attr('height', height);

svg.append("defs").append("clipPath")
    .attr("id", "clip")
  .append("rect")
    .attr("width", width)
    .attr("height", height + 20);

points = svg.selectAll(".point")
    .data(data)
  .enter().append("circle")
    .attr("class", "point")
    .attr("clip-path", "url(#clip)")
    .attr("r", function(d){return Math.floor(Math.random() * (20 - 5 + 1) + 5);})
    .attr("cx", function(d) { return x(d.index); })
    .attr("cy", function(d) { return y(d.value); })
    .call(d3.helper.tooltip());

points.on('mousedown', function(){
  brush_elm = svg.select(".brush").node();
  new_click_event = new Event('mousedown');
  new_click_event.pageX = d3.event.pageX;
  new_click_event.clientX = d3.event.clientX;
  new_click_event.pageY = d3.event.pageY;
  new_click_event.clientY = d3.event.clientY;
  brush_elm.dispatchEvent(new_click_event);
});

function brushmove() {
  var extent = brush.extent();
  points.classed("selected", function(d) {
    is_brushed = extent[0] <= d.index && d.index <= extent[1];
    return is_brushed;
  });
}

function brushend() {
  get_button = d3.select(".clear-button");
  if(get_button.empty() === true) {
    clear_button = svg.append('text')
      .attr("y", 460)
      .attr("x", 825)
      .attr("class", "clear-button")
      .text("Clear Brush");
  }

  x.domain(brush.extent());

  transition_data();
  reset_axis();

  points.classed("selected", false);
  d3.select(".brush").call(brush.clear());

  clear_button.on('click', function(){
    x.domain([0, 50]);
    transition_data();
    reset_axis();
    clear_button.remove();
  });
}

function transition_data() {
  svg.selectAll(".point")
    .data(data)
  .transition()
    .duration(500)
    .attr("cx", function(d) { return x(d.index); });
}

function reset_axis() {
  svg.transition().duration(500)
   .select(".x.axis")
   .call(xAxis);
}


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

	.point {
	fill: #2f225d;
	stroke: #afa2dc;
	}

	.selected {
	fill: #afa2dc;
	stroke: #2f225d;
	}

	.axis {
	font: 10px sans-serif;
	}

	p {
	font: 12px sans-serif;
	margin: 0 0 2px 0;
	padding: 0;
	}

	.clear-button {
	font: 14px sans-serif;
	cursor: pointer;
	}

	.axis path,
	.axis line {
	fill: none;
	stroke: #000;
	shape-rendering: crispEdges;
	}

	.brush .extent {
	stroke: #fff;
	fill-opacity: .125;
	shape-rendering: crispEdges;
	}

	</style>
	<body>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script>
	d3.helper = {};

	d3.helper.tooltip = function(){
	var tooltipDiv;
	var bodyNode = d3.select('body').node();

	function tooltip(selection){

	selection.on('mouseover.tooltip', function(pD, pI){
	// Clean up lost tooltips
	d3.select('body').selectAll('div.tooltip').remove();
	// Append tooltip
	tooltipDiv = d3.select('body')
	.append('div')
	.attr('class', 'tooltip')
	var absoluteMousePos = d3.mouse(bodyNode);
	tooltipDiv.style({
	left: (absoluteMousePos[0] + 10)+'px',
	top: (absoluteMousePos[1] - 40)+'px',
	'background-color': '#d8d5e4',
	width: '65px',
	height: '30px',
	padding: '5px',
	position: 'absolute',
	'z-index': 1001,
	'box-shadow': '0 1px 2px 0 #656565'
	});

	var first_line = '<p>X-Value: ' + pD.index + '</p>'
	var second_line = '<p>Y-Value: ' + pD.value + '</p>'

	tooltipDiv.html(first_line + second_line)
	})
	.on('mousemove.tooltip', function(pD, pI){
	// Move tooltip
	var absoluteMousePos = d3.mouse(bodyNode);
	tooltipDiv.style({
	left: (absoluteMousePos[0] + 10)+'px',
	top: (absoluteMousePos[1] - 40)+'px'
	});
	})
	.on('mouseout.tooltip', function(pD, pI){
	// Remove tooltip
	tooltipDiv.remove();
	});

	}

	tooltip.attr = function(_x){
	if (!arguments.length) return attrs;
	attrs = _x;
	return this;
	};

	tooltip.style = function(_x){
	if (!arguments.length) return styles;
	styles = _x;
	return this;
	};

	return tooltip;
	};

	var data = [];
	var values = [];
	for (var i = 2; i <= 50; i++) {
	var val = Math.floor(Math.random() * (50 - 5 + 1) + 5);
	data.push({index: i, value: val});
	values.push(val);
	}

	var margin = {top: 20, right: 20, bottom: 60, left: 40},
	width = 960 - margin.left - margin.right,
	height = 500 - margin.top - margin.bottom;

	var x = d3.scale.linear()
	.range([0, width])
	.domain([0, 50]);

	var y = d3.scale.linear()
	.range([height, 0])
	.domain([0, d3.max(values) + 5]);

	var brush = d3.svg.brush()
	.x(x)
	.on("brush", brushmove)
	.on("brushend", brushend);

	var xAxis = d3.svg.axis()
	.scale(x)
	.orient("bottom");

	var yAxis = d3.svg.axis()
	.scale(y)
	.orient("left")
	.ticks(11);

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

	svg.append("g")
	.attr("class", "x axis")
	.attr("clip-path", "url(#clip)")
	.attr("transform", "translate(0," + height + ")")
	.call(xAxis);

	svg.append("g")
	.attr("class", "y axis")
	.call(yAxis);

	svg.append("g")
	.attr("class", "brush")
	.call(brush)
	.selectAll('rect')
	.attr('height', height);

	svg.append("defs").append("clipPath")
	.attr("id", "clip")
	.append("rect")
	.attr("width", width)
	.attr("height", height + 20);

	points = svg.selectAll(".point")
	.data(data)
	.enter().append("circle")
	.attr("class", "point")
	.attr("clip-path", "url(#clip)")
	.attr("r", function(d){return Math.floor(Math.random() * (20 - 5 + 1) + 5);})
	.attr("cx", function(d) { return x(d.index); })
	.attr("cy", function(d) { return y(d.value); })
	.call(d3.helper.tooltip());

	points.on('mousedown', function(){
	brush_elm = svg.select(".brush").node();
	new_click_event = new Event('mousedown');
	new_click_event.pageX = d3.event.pageX;
	new_click_event.clientX = d3.event.clientX;
	new_click_event.pageY = d3.event.pageY;
	new_click_event.clientY = d3.event.clientY;
	brush_elm.dispatchEvent(new_click_event);
	});

	function brushmove() {
	var extent = brush.extent();
	points.classed("selected", function(d) {
	is_brushed = extent[0] <= d.index && d.index <= extent[1];
	return is_brushed;
	});
	}

	function brushend() {
	get_button = d3.select(".clear-button");
	if(get_button.empty() === true) {
	clear_button = svg.append('text')
	.attr("y", 460)
	.attr("x", 825)
	.attr("class", "clear-button")
	.text("Clear Brush");
	}

	x.domain(brush.extent());

	transition_data();
	reset_axis();

	points.classed("selected", false);
	d3.select(".brush").call(brush.clear());

	clear_button.on('click', function(){
	x.domain([0, 50]);
	transition_data();
	reset_axis();
	clear_button.remove();
	});
	}

	function transition_data() {
	svg.selectAll(".point")
	.data(data)
	.transition()
	.duration(500)
	.attr("cx", function(d) { return x(d.index); });
	}

	function reset_axis() {
	svg.transition().duration(500)
	.select(".x.axis")
	.call(xAxis);
	}


	</script>