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d3-legend.js
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d3-legend.js
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// d3.legend.js
// (C) 2012 [email protected]
// MIT licence
(function() {
d3.legend = function(g) {
g.each(function() {
var g= d3.select(this),
items = {},
svg = d3.select(g.property("nearestViewportElement")),
legendPadding = g.attr("data-style-padding") || 5,
lb = g.selectAll(".legend-box").data([true]),
li = g.selectAll(".legend-items").data([true])
lb.enter().append("rect").classed("legend-box",true)
li.enter().append("g").classed("legend-items",true)
svg.selectAll("[data-legend]").each(function() {
var self = d3.select(this)
items[self.attr("data-legend")] = {
pos : self.attr("data-legend-pos") || this.getBBox().y,
color : self.attr("data-legend-color") != undefined ? self.attr("data-legend-color") : self.style("fill") != 'none' ? self.style("fill") : self.style("stroke")
}
})
items = d3.entries(items).sort(function(a,b) { return a.value.pos-b.value.pos})
li.selectAll("text")
.data(items,function(d) { return d.key})
.call(function(d) { d.enter().append("text")})
.call(function(d) { d.exit().remove()})
.attr("y",function(d,i) { return i+"em"})
.attr("id", function(d) { return d.key+'-text';})
.attr("x","1em")
.text(function(d) { ;return d.key})
.on('click', function(d) {
if(RemoveLegendClick){
var k1 = "[id='"+d.key+"']";
var k2 = "[id='"+d.key+"-circle"+"']";
var k3 = "[id='"+d.key+"-text"+"']";
if(!d3.select(k1).empty())
{
d3.select(k1).remove();
d3.select(k2).remove();
d3.select(k3).remove();
var lbbox = li[0][0].getBBox()
lb.attr("x",(lbbox.x-legendPadding))
.attr("y",(lbbox.y-legendPadding))
.attr("height",(lbbox.height+2*legendPadding))
.attr("width",(lbbox.width+2*legendPadding))
}
else
alert (d.key) ;
}
else
alert (d.key) ;
});
li.selectAll("circle")
.data(items,function(d) { return d.key})
.call(function(d) { d.enter().append("circle")})
.call(function(d) { d.exit().remove()})
.attr("cy",function(d,i) { return i-0.25+"em"})
.attr("cx",0)
.attr("id", function(d) { return d.key+'-circle';})
.attr("r","0.4em")
.on('click', function(d) {
if(RemoveLegendClick){
var k1 = "[id='"+d.key+"']";
var k2 = "[id='"+d.key+"-circle"+"']";
var k3 = "[id='"+d.key+"-text"+"']";
if(!d3.select(k1).empty())
{
d3.select(k1).remove();
d3.select(k2).remove();
d3.select(k3).remove();
var lbbox = li[0][0].getBBox()
lb.attr("x",(lbbox.x-legendPadding))
.attr("y",(lbbox.y-legendPadding))
.attr("height",(lbbox.height+2*legendPadding))
.attr("width",(lbbox.width+2*legendPadding))
}
else
alert (d.key) ;
}
else
alert (d.key) ;
})
.style("fill",function(d) { console.log(d.value.color);return d.value.color})
// Reposition and resize the box
var lbbox = li[0][0].getBBox()
lb.attr("x",(lbbox.x-legendPadding))
.attr("y",(lbbox.y-legendPadding))
.attr("height",(lbbox.height+2*legendPadding))
.attr("width",(lbbox.width+2*legendPadding))
})
return g
}
})()