Grid layout in combination with multi-dimensional sorting using d3.comparator.
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October 6, 2017 15:43
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Sorting the Grid
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(function() { | |
d3.comparator = function() { | |
var cmps = [], accessors = []; | |
var comparator = function(a, b) { | |
var i = -1, | |
n = cmps.length, | |
result; | |
while (++i < n) { | |
result = cmps[i](accessors[i](a), accessors[i](b)); | |
if (result !== 0) return result; | |
} | |
return 0; | |
} | |
comparator.order = function(cmp, accessor) { | |
cmps.push(cmp); | |
accessors.push(accessor || identity); | |
return comparator; | |
} | |
return comparator; | |
} | |
function identity(d) { return d; } | |
})(); |
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(function() { | |
d3.layout.grid = function() { | |
var mode = "equal", | |
layout = _distributeEqually, | |
x = d3.scale.ordinal(), | |
y = d3.scale.ordinal(), | |
size = [1, 1], | |
actualSize = [0, 0], | |
nodeSize = false, | |
bands = false, | |
padding = [0, 0], | |
cols, rows; | |
function grid(nodes) { | |
return layout(nodes); | |
} | |
function _distributeEqually(nodes) { | |
var i = -1, | |
n = nodes.length, | |
_cols = cols ? cols : 0, | |
_rows = rows ? rows : 0, | |
col, row; | |
if (_rows && !_cols) { | |
_cols = Math.ceil(n / _rows) | |
} else { | |
_cols || (_cols = Math.ceil(Math.sqrt(n))); | |
_rows || (_rows = Math.ceil(n / _cols)); | |
} | |
if (nodeSize) { | |
x.domain(d3.range(_cols)).range(d3.range(0, (size[0] + padding[0]) * _cols, size[0] + padding[0])); | |
y.domain(d3.range(_rows)).range(d3.range(0, (size[1] + padding[1]) * _rows, size[1] + padding[1])); | |
actualSize[0] = bands ? x(_cols - 1) + size[0] : x(_cols - 1); | |
actualSize[1] = bands ? y(_rows - 1) + size[1] : y(_rows - 1); | |
} else if (bands) { | |
x.domain(d3.range(_cols)).rangeBands([0, size[0]], padding[0], 0); | |
y.domain(d3.range(_rows)).rangeBands([0, size[1]], padding[1], 0); | |
actualSize[0] = x.rangeBand(); | |
actualSize[1] = y.rangeBand(); | |
} else { | |
x.domain(d3.range(_cols)).rangePoints([0, size[0]]); | |
y.domain(d3.range(_rows)).rangePoints([0, size[1]]); | |
actualSize[0] = x(1); | |
actualSize[1] = y(1); | |
} | |
while (++i < n) { | |
col = i % _cols; | |
row = Math.floor(i / _cols); | |
nodes[i].x = x(col); | |
nodes[i].y = y(row); | |
} | |
return nodes; | |
} | |
grid.size = function(value) { | |
if (!arguments.length) return nodeSize ? actualSize : size; | |
actualSize = [0, 0]; | |
nodeSize = (size = value) == null; | |
return grid; | |
} | |
grid.nodeSize = function(value) { | |
if (!arguments.length) return nodeSize ? size : actualSize; | |
actualSize = [0, 0]; | |
nodeSize = (size = value) != null; | |
return grid; | |
} | |
grid.rows = function(value) { | |
if (!arguments.length) return rows; | |
rows = value; | |
return grid; | |
} | |
grid.cols = function(value) { | |
if (!arguments.length) return cols; | |
cols = value; | |
return grid; | |
} | |
grid.bands = function() { | |
bands = true; | |
return grid; | |
} | |
grid.points = function() { | |
bands = false; | |
return grid; | |
} | |
grid.padding = function(value) { | |
if (!arguments.length) return padding; | |
padding = value; | |
return grid; | |
} | |
return grid; | |
}; | |
})(); |
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
body { | |
font-family: Helvetica, sans-serif; | |
} | |
svg { | |
position: absolute; | |
top: 0; | |
left: 0; | |
z-index: -1; | |
} | |
</style> | |
<body> | |
Sort by | |
<a href="#" class="sort-btn" data-sort="id">id</a> / | |
<a href="#" class="sort-btn" data-sort="size">size</a> / | |
<a href="#" class="sort-btn" data-sort="color">color</a> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<script src="d3-grid.js"></script> | |
<script src="d3-comparator.js"></script> | |
<script> | |
var width = 960, | |
height = 500; | |
var grid = d3.layout.grid() | |
.size([400, 400]); | |
var color = d3.scale.linear() | |
.interpolate(d3.interpolateHcl) | |
.domain([0, 9]) | |
.range(["rgb(33,49,62)", "rgb(239,238,105)"]); | |
var size = d3.scale.sqrt() | |
.domain([0, 9]) | |
.range([0, 20]); | |
var sortBy = { | |
id: d3.comparator() | |
.order(d3.ascending, function(d) { return d.id; }), | |
color: d3.comparator() | |
.order(d3.ascending, function(d) { return d.color; }) | |
.order(d3.descending, function(d) { return d.size; }) | |
.order(d3.ascending, function(d) { return d.id; }), | |
size: d3.comparator() | |
.order(d3.descending, function(d) { return d.size; }) | |
.order(d3.ascending, function(d) { return d.color; }) | |
.order(d3.ascending, function(d) { return d.id; }) | |
}; | |
var data = d3.range(64).map(function(d) { | |
return { | |
id: d, | |
size: 1 + Math.floor(Math.random() * 9), | |
color: Math.floor(Math.random() * 10) | |
}; | |
}); | |
var svg = d3.select("body").append("svg") | |
.attr({ | |
width: width, | |
height: height | |
}) | |
.append("g") | |
.attr("transform", "translate(280,50)"); | |
d3.selectAll(".sort-btn") | |
.on("click", function(d) { | |
d3.event.preventDefault(); | |
data.sort(sortBy[this.dataset.sort]); | |
update(); | |
}); | |
update(); | |
function update() { | |
var node = svg.selectAll(".node") | |
.data(grid(data), function(d) { return d.id; }); | |
node.enter().append("circle") | |
.attr("class", "node") | |
.attr("r", 1e-9) | |
.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; }) | |
.style("fill", function(d) { return color(d.color); }); | |
node.transition().duration(1000).delay(function(d, i) { return i * 20; }) | |
.attr("r", function(d) { return size(d.size); }) | |
.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; }); | |
node.exit().transition() | |
.attr("r", 1e-9) | |
.remove(); | |
} | |
</script> |
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