This example shows a way to create draggable SVG shapes using d3.js's drag behavior.
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August 29, 2015 14:04
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Drag
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# data | |
nodes_data = [ | |
{x: 0, y: 0}, | |
{x: 80, y: 80}, | |
{x: -80, y: 80}, | |
{x: -80, y: -80}, | |
{x: 80, y: -80} | |
] | |
svg = d3.select('svg') | |
width = svg.node().getBoundingClientRect().width | |
height = svg.node().getBoundingClientRect().height | |
# translate the viewBox to have (0,0) at the center of the vis | |
svg | |
.attr | |
viewBox: "#{-width/2} #{-height/2} #{width} #{height}" | |
# define a drag behavior | |
drag = d3.behavior.drag() | |
.origin((d) -> d) | |
drag.on 'drag', (d) -> | |
# update the datum of the dragged node | |
d.x = d3.event.x | |
d.y = d3.event.y | |
# translate the representation | |
d3.select(this) | |
.attr | |
transform: "translate(#{d.x},#{d.y})" | |
# add draggable nodes | |
nodes = svg.selectAll('.node') | |
.data(nodes_data) | |
nodes.enter().append('circle') | |
.call(drag) # enable dragging for nodes | |
.attr | |
class: 'node' | |
r: 20 | |
fill: 'gray' | |
transform: (d) -> "translate(#{d.x},#{d.y})" | |
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svg { | |
background: white; | |
} |
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
<meta name="description" content="Drag" /> | |
<title>Drag</title> | |
<link type="text/css" href="index.css" rel="stylesheet"/> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
</head> | |
<body> | |
<svg height="500" width="960"></svg> | |
<script src="index.js"></script> | |
</body> | |
</html> |
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(function() { | |
var drag, height, nodes, nodes_data, svg, width; | |
nodes_data = [ | |
{ | |
x: 0, | |
y: 0 | |
}, { | |
x: 80, | |
y: 80 | |
}, { | |
x: -80, | |
y: 80 | |
}, { | |
x: -80, | |
y: -80 | |
}, { | |
x: 80, | |
y: -80 | |
} | |
]; | |
svg = d3.select('svg'); | |
width = svg.node().getBoundingClientRect().width; | |
height = svg.node().getBoundingClientRect().height; | |
svg.attr({ | |
viewBox: "" + (-width / 2) + " " + (-height / 2) + " " + width + " " + height | |
}); | |
drag = d3.behavior.drag().origin(function(d) { | |
return d; | |
}); | |
drag.on('drag', function(d) { | |
d.x = d3.event.x; | |
d.y = d3.event.y; | |
return d3.select(this).attr({ | |
transform: "translate(" + d.x + "," + d.y + ")" | |
}); | |
}); | |
nodes = svg.selectAll('.node').data(nodes_data); | |
nodes.enter().append('circle').call(drag).attr({ | |
"class": 'node', | |
r: 20, | |
fill: 'gray', | |
transform: function(d) { | |
return "translate(" + d.x + "," + d.y + ")"; | |
} | |
}); | |
}).call(this); |
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