How to apply a pattern for a D3 bar chart?
I am trying to apply a pattern to a D3 bar chart, but what I get is this:
I am using a green and red pattern defined as follows:
var defs = this.svg.append("g:defs"); defs.append("g:pattern") .attr("id", "red-fill") .attr("patternUnits", "userSpaceOnUse") .attr("width", "85") .attr("height", "10") .append("g:image") .attr("xlink:href", "../10px-barchart-red.png") .attr("x", 0) .attr("y", 0) .attr("width", 85) .attr("height", 10); var defs = this.svg.append("g:defs"); defs.append("g:pattern") .attr("id", "green-fill") .attr("patternUnits", "userSpaceOnUse") .attr("width", "85") .attr("height", "10") .append("g:image") .attr("xlink:href", "../10px-barchart-green.png") .attr("x", 0) .attr("y", 0) .attr("width", 85) .attr("height", 10);
And the plot is made with:
this.svg.selectAll("rect") .data(dataset, getKeys) .enter() .append("rect") .attr('class', 'bar') .attr("x", function(d, i) { return x(i) + 44; }) .attr("y", function(d, i) { return y(d.value); }) .attr("width", x.rangeBand()) .attr("height", function(d, i) { return height + padding - y(d.value); }) .attr("fill", function(d) { if (d.key == 0) { return "url(#green-fill)"; } else { return "url(#red-fill)"; } })
This block by John Schulz successfully makes patterned bar charts that look fantastic (https://bl.ocks.org/jfsiii/7772281).
Copied the code in the below snippet for convenience and perpetuity (also added a little animation to show that it transitions well also).
var first = true;
setInterval( function(){
if(first){
d3.select('.thing-2').transition()
.delay(500)
.duration(1000)
.attr('height',20)
.attr('y',80)
}else{
d3.select('.thing-2').transition()
.delay(500)
.duration(1000)
.attr('height',100)
.attr('y',0)
}
first = !first;
},2500)
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>SVG colored patterns via mask</title>
<style>
/* FF seems to need explicit dimensions */
svg {
width: 500px;
height: 500px;
}
rect.hbar {
mask: url(#mask-stripe)
}
.thing-1 {
fill: blue;
}
.thing-2 {
fill: green;
}
</style>
</head>
<body>
<svg>
<defs>
<pattern id="pattern-stripe"
width="4" height="4"
patternUnits="userSpaceOnUse"
patternTransform="rotate(45)">
<rect width="2" height="4" transform="translate(0,0)" fill="white"></rect>
</pattern>
<mask id="mask-stripe">
<rect x="0" y="0" width="100%" height="100%" fill="url(#pattern-stripe)" />
</mask>
</defs>
<!-- bar chart -->
<rect class="hbar thing-2" x="0" y="0" width="50" height="100"></rect>
<rect class="hbar thing-2" x="51" y="50" width="50" height="50"></rect>
<rect class="hbar thing-2" x="102" y="25" width="50" height="75"></rect>
<!-- horizontal bar chart -->
<rect class="hbar thing-1" x="0" y="200" width="10" height="50"></rect>
<rect class="hbar thing-1" x="0" y="251" width="123" height="50"></rect>
<rect class="hbar thing-1" x="0" y="302" width="41" height="50"></rect>
</svg>
</body>
</html>
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