nvd3-fork
Version:
FORK! of NVD3, a reusable charting library written in d3.js
143 lines (122 loc) • 6.38 kB
JavaScript
nv.models.sparkline = function() {
"use strict";
//============================================================
// Public Variables with Default Settings
//------------------------------------------------------------
var margin = {top: 2, right: 0, bottom: 2, left: 0}
, width = 400
, height = 32
, container = null
, animate = true
, x = d3.scale.linear()
, y = d3.scale.linear()
, getX = function(d) { return d.x }
, getY = function(d) { return d.y }
, color = nv.utils.getColor(['#000'])
, xDomain
, yDomain
, xRange
, yRange
, showMinMaxPoints = true
, showCurrentPoint = true
, dispatch = d3.dispatch('renderEnd')
;
//============================================================
// Private Variables
//------------------------------------------------------------
var renderWatch = nv.utils.renderWatch(dispatch);
function chart(selection) {
renderWatch.reset();
selection.each(function(data) {
var availableWidth = width - margin.left - margin.right,
availableHeight = height - margin.top - margin.bottom;
container = d3.select(this);
nv.utils.initSVG(container);
// Setup Scales
x .domain(xDomain || d3.extent(data, getX ))
.range(xRange || [0, availableWidth]);
y .domain(yDomain || d3.extent(data, getY ))
.range(yRange || [availableHeight, 0]);
// Setup containers and skeleton of chart
var wrap = container.selectAll('g.nv-wrap.nv-sparkline').data([data]);
var wrapEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-sparkline');
var gEnter = wrapEnter.append('g');
var g = wrap.select('g');
wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')')
var paths = wrap.selectAll('path')
.data(function(d) { return [d] });
paths.enter().append('path');
paths.exit().remove();
paths
.style('stroke', function(d,i) { return d.color || color(d, i) })
.attr('d', d3.svg.line()
.x(function(d,i) { return x(getX(d,i)) })
.y(function(d,i) { return y(getY(d,i)) })
);
// TODO: Add CURRENT data point (Need Min, Mac, Current / Most recent)
var points = wrap.selectAll('circle.nv-point')
.data(function(data) {
var yValues = data.map(function(d, i) { return getY(d,i); });
function pointIndex(index) {
if (index != -1) {
var result = data[index];
result.pointIndex = index;
return result;
} else {
return null;
}
}
var maxPoint = pointIndex(yValues.lastIndexOf(y.domain()[1])),
minPoint = pointIndex(yValues.indexOf(y.domain()[0])),
currentPoint = pointIndex(yValues.length - 1);
return [(showMinMaxPoints ? minPoint : null), (showMinMaxPoints ? maxPoint : null), (showCurrentPoint ? currentPoint : null)].filter(function (d) {return d != null;});
});
points.enter().append('circle');
points.exit().remove();
points
.attr('cx', function(d,i) { return x(getX(d,d.pointIndex)) })
.attr('cy', function(d,i) { return y(getY(d,d.pointIndex)) })
.attr('r', 2)
.attr('class', function(d,i) {
return getX(d, d.pointIndex) == x.domain()[1] ? 'nv-point nv-currentValue' :
getY(d, d.pointIndex) == y.domain()[0] ? 'nv-point nv-minValue' : 'nv-point nv-maxValue'
});
});
renderWatch.renderEnd('sparkline immediate');
return chart;
}
//============================================================
// Expose Public Variables
//------------------------------------------------------------
chart.options = nv.utils.optionsFunc.bind(chart);
chart._options = Object.create({}, {
// simple options, just get/set the necessary values
width: {get: function(){return width;}, set: function(_){width=_;}},
height: {get: function(){return height;}, set: function(_){height=_;}},
xDomain: {get: function(){return xDomain;}, set: function(_){xDomain=_;}},
yDomain: {get: function(){return yDomain;}, set: function(_){yDomain=_;}},
xRange: {get: function(){return xRange;}, set: function(_){xRange=_;}},
yRange: {get: function(){return yRange;}, set: function(_){yRange=_;}},
xScale: {get: function(){return x;}, set: function(_){x=_;}},
yScale: {get: function(){return y;}, set: function(_){y=_;}},
animate: {get: function(){return animate;}, set: function(_){animate=_;}},
showMinMaxPoints: {get: function(){return showMinMaxPoints;}, set: function(_){showMinMaxPoints=_;}},
showCurrentPoint: {get: function(){return showCurrentPoint;}, set: function(_){showCurrentPoint=_;}},
//functor options
x: {get: function(){return getX;}, set: function(_){getX=d3.functor(_);}},
y: {get: function(){return getY;}, set: function(_){getY=d3.functor(_);}},
// options that require extra logic in the setter
margin: {get: function(){return margin;}, set: function(_){
margin.top = _.top !== undefined ? _.top : margin.top;
margin.right = _.right !== undefined ? _.right : margin.right;
margin.bottom = _.bottom !== undefined ? _.bottom : margin.bottom;
margin.left = _.left !== undefined ? _.left : margin.left;
}},
color: {get: function(){return color;}, set: function(_){
color = nv.utils.getColor(_);
}}
});
chart.dispatch = dispatch;
nv.utils.initOptions(chart);
return chart;
};