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rlugojr/README.md

Created June 24, 2016 02:48
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Filtering the Grid
Raw
README.md
Raw
d3-comparator.js
(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; }
})();
Raw
d3-grid.js
(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;
};
})();
Raw
index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
font-family: Helvetica, sans-serif;
}
svg {
position: absolute;
top: 0;
left: 0;
z-index: -1;
}
.filter-btn.active {
font-weight: bold;
}
</style>
<body>
Color
<a href="#" class="filter-btn" data-filter="color" data-value="all">all</a> /
<a href="#" class="filter-btn" data-filter="color" data-value="pink">pink</a> /
<a href="#" class="filter-btn" data-filter="color" data-value="blue">blue</a>
<br>
Shape
<a href="#" class="filter-btn" data-filter="shape" data-value="all">all</a> /
<a href="#" class="filter-btn" data-filter="shape" data-value="square">square</a> /
<a href="#" class="filter-btn" data-filter="shape" data-value="circle">circle</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 filters = {
color: "all",
shape: "all"
}
var grid = d3.layout.grid()
.size([400, 400]);
var color = d3.scale.ordinal()
.domain(["pink", "blue"])
.range(["#F66A96", "#3E6E9C"]);
var size = d3.scale.linear()
.domain([0, 9])
.range([0, 2000]);
var symbol = d3.svg.symbol();
var sortBySize = d3.comparator()
.order(d3.descending, function(d) { return d.size; });
var data = d3.range(64).map(function(d) {
return {
id: d,
size: 1 + Math.floor(Math.random() * 9),
color: Math.random() > 0.5 ? "pink" : "blue",
shape: Math.random() > 0.5 ? "square" : "circle"
};
});
var svg = d3.select("body").append("svg")
.attr({
width: width,
height: height
})
.append("g")
.attr("transform", "translate(280,50)");
var filterButtons = d3.selectAll(".filter-btn")
.on("click", function(d) {
d3.event.preventDefault();
filters[this.dataset.filter] = this.dataset.value;
update();
});
update();
function update() {
var node = svg.selectAll(".node")
.data(grid(data.filter(applyFilters).sort(sortBySize)), function(d) { return d.id; });
node.enter().append("path")
.attr("class", "node")
.attr("d", function(d) { return symbol.type(d.shape).size(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("d", function(d) { return symbol.type(d.shape).size(size(d.size))(); })
.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
node.exit().transition()
.attr("d", function(d) { return symbol.type(d.shape).size(1e-9)(); })
.remove();
filterButtons
.classed("active", function(d) { return this.dataset.value === filters[this.dataset.filter]; });
}
function applyFilters(d) {
for (var f in filters) {
if (filters[f] === "all") continue;
if (filters[f] !== d[f]) return false;
}
return true;
}
</script>
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