Toggling ordinal/linear scales for X and Y axes.
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November 26, 2015 03:14
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D3 Bar Chart with Rotation Toggle
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[{ | |
"cartridge": "9mm FMJ/115", | |
"muzzleVelocity": 1300, | |
"energy": 570 | |
}, { | |
"cartridge": "9mm JHP +P/115", | |
"muzzleVelocity": 1350, | |
"energy": 632 | |
}, { | |
"cartridge": ".45 ACP JHP/185", | |
"muzzleVelocity": 1050, | |
"energy": 453 | |
}, { | |
"cartridge": ".45 ACP JHP +P/200", | |
"muzzleVelocity": 1080, | |
"energy": 518 | |
}, { | |
"cartridge": ".40 S&W JHP/155", | |
"muzzleVelocity": 1205, | |
"energy": 500 | |
}, { | |
"cartridge": ".40 S&W FMJ/180", | |
"muzzleVelocity": 1050, | |
"energy": 441 | |
}] |
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
<meta http-equiv="cache-control" content="max-age=0" /> | |
<meta http-equiv="cache-control" content="no-cache" /> | |
<meta http-equiv="expires" content="0" /> | |
<meta http-equiv="pragma" content="no-cache" /> | |
<style type="text/css"> | |
body { | |
padding: 5px; | |
} | |
#frm { | |
margin: 0; | |
padding: 0; | |
padding-left: 10px; | |
} | |
label { | |
font-size: 12px; | |
font-family: sans-serif; | |
} | |
label a { | |
margin-right: 10px; | |
margin-left: 5px; | |
font-family: inherit; | |
color: #009; | |
} | |
label a:hover { | |
color: #906; | |
} | |
.axis path, .axis line { | |
fill: none; | |
stroke: black; | |
stroke-width: 1; | |
shape-rendering: crispEdges; | |
} | |
.axis text { | |
font-size: 9px; | |
font-family: sans-serif; | |
fill: #555; | |
pointer-events: none; | |
} | |
</style> | |
</head> | |
<body> | |
<form id="frm"> | |
<label><b>Orientation:</b></label> | |
<label><a href="#" class="toggle" orientation="vertical">Vertical</a></label> | |
<label><a href="#" class="toggle" orientation="horizontal">Horizontal</a></label> | |
</form> | |
<script type="text/javascript" src="http://d3js.org/d3.v3.min.js"></script> | |
<script type="text/javascript"> | |
var svg, | |
canvasHeight = 400, | |
canvasWidth = 800, | |
chartData = [], | |
gPrimary, | |
gXAxis, | |
gYAxis; | |
var config = { | |
axes: { | |
x: null, | |
y: null | |
}, | |
chartOrientation: 'vertical', | |
colorScale: d3.scale.category20(), | |
margins: { | |
top: 30, | |
right: 30, | |
bottom: 30, | |
left: 75 | |
}, | |
maxBarWidth: 40, | |
metrics: { | |
x: 'cartridge', | |
y: 'muzzleVelocity' | |
}, | |
scales: { | |
x: null, | |
y: null | |
}, | |
transitionDurations: { | |
bars: 750, | |
axes: 500 | |
} | |
}; | |
initChart(); | |
d3.selectAll('a.toggle').on('click', function() { | |
var o = this.getAttribute('orientation'); | |
config.chartOrientation = o; | |
if(o == 'horizontal') { | |
config.margins.left = 125; | |
config.metrics.x = 'muzzleVelocity'; | |
config.metrics.y = 'cartridge'; | |
} else { | |
config.margins.left = 75; | |
config.metrics.y = 'muzzleVelocity'; | |
config.metrics.x = 'cartridge'; | |
} | |
setScales(); | |
handleBars(); | |
callAxes(); | |
}); | |
d3.json('ballistics.json', function(error, data) { | |
chartData = data; | |
setScales(); | |
callAxes(); | |
handleBars(); | |
gPrimary.append('text') | |
.attr('x', function() { | |
return (canvasWidth - config.margins.left - config.margins.right)/2; | |
}) | |
.attr('y', function() { | |
return config.margins.top * .5; | |
}) | |
.style('font-size', '12px') | |
.style('font-weight', 'bold') | |
.style('text-anchor', 'middle') | |
.text('Muzzle Velocity (fps) for Popular Handgun Rounds'); | |
}); | |
/** | |
* @function | |
* @description Initialize chart components | |
*/ | |
function initChart() { | |
svg = d3.select('body') | |
.append('svg') | |
.attr('width', canvasWidth) | |
.attr('height', canvasHeight); | |
gPrimary = svg.append('svg:g'); | |
gXAxis = svg.append('svg:g') | |
.attr('class', 'axis') | |
.attr('transform', function() { | |
var x = config.margins.left, y = canvasHeight - config.margins.bottom; | |
return 'translate(' + x + ',' + y + ')'; | |
}); | |
gYAxis = svg.append('svg:g') | |
.attr('class', 'axis') | |
.attr('transform', function() { | |
var x = config.margins.left, y = 0; | |
return 'translate(' + x + ',' + y + ')'; | |
}); | |
} | |
/** | |
* @function | |
* @description Draw/transition rectangles | |
*/ | |
function handleBars() { | |
gPrimary.attr('transform', function() { | |
var x = config.margins.left, y = 0; | |
return 'translate(' + x + ',' + y + ')'; | |
}); | |
////////////////////////////// | |
// rectangles - JRAT | |
// (join, remove, append, transition) | |
////////////////////////////// | |
var rectSelection = gPrimary.selectAll('rect') | |
.data(chartData); | |
rectSelection.exit().remove(); | |
rectSelection.enter() | |
.append('rect') | |
.style('opacity', .8) | |
.style('stroke', 'black') | |
.style('stroke-width', 1) | |
.attr('rx', 3) | |
.attr('ry', 3) | |
.on('mouseover', function(d, i) { | |
d3.select(this).style('opacity', 1); | |
gPrimary.selectAll('rect').filter(function(e, j) { | |
return i != j; | |
}).style('opacity', .2); | |
}) | |
.on('mouseout', function(d, i) { | |
gPrimary.selectAll('rect').style('opacity', .8); | |
}); | |
if(config.chartOrientation == 'horizontal') { | |
rectSelection.transition() | |
.duration(config.transitionDurations.bars) | |
.attr('x', function(d) { | |
return 0; | |
}) | |
.attr('y', function(d) { | |
return config.scales.y(d[config.metrics.y]); | |
}) | |
.attr('width', function(d) { | |
return config.scales.x(d[config.metrics.x]); | |
}) | |
.attr('height', function(d) { | |
return Math.min(config.scales.y.rangeBand(), config.maxBarWidth); | |
}) | |
.attr('transform', function(d, i) { | |
var x = 0, y = 0; | |
if(config.maxBarWidth < config.scales.y.rangeBand()) { | |
y = (config.scales.y.rangeBand() - config.maxBarWidth)/2; | |
} | |
return 'translate(' + x + ',' + y + ')'; | |
}) | |
.style('fill', function(d, i) { | |
return config.colorScale(i); | |
}); | |
} else { | |
rectSelection.transition() | |
.duration(config.transitionDurations.bars) | |
.attr('x', function(d) { | |
return config.scales.x(d[config.metrics.x]); | |
}) | |
.attr('y', function(d) { | |
return config.margins.top + config.scales.y(d[config.metrics.y]); | |
}) | |
.attr('width', function(d) { | |
return Math.min(config.maxBarWidth, config.scales.x.rangeBand()); | |
}) | |
.attr('height', function(d) { | |
return canvasHeight - config.margins.bottom - (config.margins.top + config.scales.y(d[config.metrics.y])); | |
}) | |
.attr('transform', function() { | |
if(config.maxBarWidth < config.scales.x.rangeBand()) { | |
var t = (config.scales.x.rangeBand() - config.maxBarWidth)/2; | |
return 'translate(' + t + ',0)'; | |
} | |
}) | |
.style('fill', function(d, i) { | |
return config.colorScale(i); | |
}); | |
} | |
} | |
/** | |
* @function | |
* @description Wrapper function for setting V/H scales | |
*/ | |
function setScales() { | |
if(config.chartOrientation == 'horizontal') { | |
setHorizontalScales(); | |
} else { | |
setVerticalScales(); | |
} | |
} | |
/** | |
* @function | |
* @description Set horizontal scales...x=linear, y=ordinal | |
*/ | |
function setHorizontalScales() { | |
// x scale (linear) | |
config.scales.x = d3.scale.linear() | |
.domain([0, d3.max(chartData, function(d) { return d[config.metrics.x]; })]) | |
.range([0, canvasWidth - config.margins.left - config.margins.right]) | |
.nice(); | |
// x axis | |
config.axes.x = d3.svg.axis() | |
.scale(config.scales.x) | |
.tickSize(3) | |
.tickPadding(3) | |
.orient('bottom'); | |
// y scale (ordinal) | |
config.scales.y = d3.scale.ordinal() | |
.domain(chartData.map(function(m) { | |
return m[config.metrics.y]; | |
})) | |
.rangeRoundBands([config.margins.top, canvasHeight - config.margins.bottom], .08, .1); | |
// y axis | |
config.axes.y = d3.svg.axis() | |
.scale(config.scales.y) | |
.tickSize(3) | |
.tickPadding(3) | |
.orient('left'); | |
} | |
/** | |
* @function | |
* @description Set vertical scales...x=ordinal, y = linear | |
*/ | |
function setVerticalScales() { | |
// x scale (ordinal) | |
config.scales.x = d3.scale.ordinal() | |
.domain(chartData.map(function(m) { | |
return m[config.metrics.x]; | |
})) | |
.rangeRoundBands([0, canvasWidth - config.margins.left - config.margins.right], 0.08, 0.1); | |
// x axis | |
config.axes.x = d3.svg.axis() | |
.scale(config.scales.x) | |
.tickSize(3) | |
.tickPadding(3) | |
.orient('bottom'); | |
// y scale (linear) | |
config.scales.y = d3.scale.linear() | |
.domain([ | |
d3.max(chartData, function(d) { return d[config.metrics.y]; }), | |
0 | |
]) | |
.range([ | |
config.margins.top, canvasHeight - config.margins.bottom | |
]) | |
.nice(); | |
// y axis | |
config.axes.y = d3.svg.axis() | |
.scale(config.scales.y) | |
.tickSize(3) | |
.tickPadding(3) | |
.orient('left'); | |
} | |
/** | |
* @function | |
* @description Call axis handlers | |
*/ | |
function callAxes() { | |
gXAxis.transition() | |
.duration(config.transitionDurations.axes) | |
.attr('transform', function() { | |
var x = config.margins.left, y = canvasHeight - config.margins.bottom; | |
return 'translate(' + x + ',' + y + ')'; | |
}) | |
.call(config.axes.x); | |
gYAxis.transition() | |
.duration(config.transitionDurations.axes) | |
.attr('transform', function() { | |
var x = config.margins.left, y = 0; | |
return 'translate(' + x + ',' + y + ')'; | |
}) | |
.call(config.axes.y); | |
} | |
</script> | |
</body> | |
</html> |
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