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369 lines
11 KiB
JavaScript
369 lines
11 KiB
JavaScript
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nv.models.stackedArea = function() {
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"use strict";
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//============================================================
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// Public Variables with Default Settings
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//------------------------------------------------------------
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var margin = {top: 0, right: 0, bottom: 0, left: 0}
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, width = 960
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, height = 500
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, color = nv.utils.defaultColor() // a function that computes the color
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, id = Math.floor(Math.random() * 100000) //Create semi-unique ID incase user doesn't selet one
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, getX = function(d) { return d.x } // accessor to get the x value from a data point
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, getY = function(d) { return d.y } // accessor to get the y value from a data point
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, style = 'stack'
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, offset = 'zero'
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, order = 'default'
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, interpolate = 'linear' // controls the line interpolation
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, clipEdge = false // if true, masks lines within x and y scale
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, x //can be accessed via chart.xScale()
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, y //can be accessed via chart.yScale()
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, scatter = nv.models.scatter()
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, dispatch = d3.dispatch('tooltipShow', 'tooltipHide', 'areaClick', 'areaMouseover', 'areaMouseout')
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;
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scatter
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.size(2.2) // default size
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.sizeDomain([2.2,2.2]) // all the same size by default
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;
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/************************************
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* offset:
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* 'wiggle' (stream)
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* 'zero' (stacked)
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* 'expand' (normalize to 100%)
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* 'silhouette' (simple centered)
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*
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* order:
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* 'inside-out' (stream)
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* 'default' (input order)
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************************************/
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//============================================================
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function chart(selection) {
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selection.each(function(data) {
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var availableWidth = width - margin.left - margin.right,
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availableHeight = height - margin.top - margin.bottom,
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container = d3.select(this);
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//------------------------------------------------------------
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// Setup Scales
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x = scatter.xScale();
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y = scatter.yScale();
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//------------------------------------------------------------
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var dataRaw = data;
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// Injecting point index into each point because d3.layout.stack().out does not give index
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data.forEach(function(aseries, i) {
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aseries.seriesIndex = i;
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aseries.values = aseries.values.map(function(d, j) {
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d.index = j;
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d.seriesIndex = i;
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return d;
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});
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});
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var dataFiltered = data.filter(function(series) {
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return !series.disabled;
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});
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data = d3.layout.stack()
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.order(order)
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.offset(offset)
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.values(function(d) { return d.values }) //TODO: make values customizeable in EVERY model in this fashion
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.x(getX)
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.y(getY)
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.out(function(d, y0, y) {
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var yHeight = (getY(d) === 0) ? 0 : y;
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d.display = {
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y: yHeight,
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y0: y0
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};
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})
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(dataFiltered);
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//------------------------------------------------------------
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// Setup containers and skeleton of chart
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var wrap = container.selectAll('g.nv-wrap.nv-stackedarea').data([data]);
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var wrapEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-stackedarea');
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var defsEnter = wrapEnter.append('defs');
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var gEnter = wrapEnter.append('g');
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var g = wrap.select('g');
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gEnter.append('g').attr('class', 'nv-areaWrap');
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gEnter.append('g').attr('class', 'nv-scatterWrap');
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wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
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//------------------------------------------------------------
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scatter
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.width(availableWidth)
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.height(availableHeight)
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.x(getX)
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.y(function(d) { return d.display.y + d.display.y0 })
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.forceY([0])
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.color(data.map(function(d,i) {
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return d.color || color(d, d.seriesIndex);
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}));
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var scatterWrap = g.select('.nv-scatterWrap')
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.datum(data);
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scatterWrap.call(scatter);
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defsEnter.append('clipPath')
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.attr('id', 'nv-edge-clip-' + id)
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.append('rect');
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wrap.select('#nv-edge-clip-' + id + ' rect')
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.attr('width', availableWidth)
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.attr('height', availableHeight);
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g .attr('clip-path', clipEdge ? 'url(#nv-edge-clip-' + id + ')' : '');
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var area = d3.svg.area()
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.x(function(d,i) { return x(getX(d,i)) })
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.y0(function(d) {
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return y(d.display.y0)
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})
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.y1(function(d) {
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return y(d.display.y + d.display.y0)
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})
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.interpolate(interpolate);
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var zeroArea = d3.svg.area()
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.x(function(d,i) { return x(getX(d,i)) })
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.y0(function(d) { return y(d.display.y0) })
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.y1(function(d) { return y(d.display.y0) });
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var path = g.select('.nv-areaWrap').selectAll('path.nv-area')
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.data(function(d) { return d });
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path.enter().append('path').attr('class', function(d,i) { return 'nv-area nv-area-' + i })
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.attr('d', function(d,i){
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return zeroArea(d.values, d.seriesIndex);
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})
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.on('mouseover', function(d,i) {
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d3.select(this).classed('hover', true);
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dispatch.areaMouseover({
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point: d,
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series: d.key,
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pos: [d3.event.pageX, d3.event.pageY],
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seriesIndex: i
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});
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})
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.on('mouseout', function(d,i) {
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d3.select(this).classed('hover', false);
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dispatch.areaMouseout({
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point: d,
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series: d.key,
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pos: [d3.event.pageX, d3.event.pageY],
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seriesIndex: i
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});
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})
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.on('click', function(d,i) {
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d3.select(this).classed('hover', false);
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dispatch.areaClick({
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point: d,
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series: d.key,
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pos: [d3.event.pageX, d3.event.pageY],
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seriesIndex: i
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});
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})
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path.exit().transition()
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.attr('d', function(d,i) { return zeroArea(d.values,i) })
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.remove();
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path
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.style('fill', function(d,i){
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return d.color || color(d, d.seriesIndex)
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})
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.style('stroke', function(d,i){ return d.color || color(d, d.seriesIndex) });
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path.transition()
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.attr('d', function(d,i) {
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return area(d.values,i)
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});
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//============================================================
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// Event Handling/Dispatching (in chart's scope)
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//------------------------------------------------------------
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scatter.dispatch.on('elementMouseover.area', function(e) {
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g.select('.nv-chart-' + id + ' .nv-area-' + e.seriesIndex).classed('hover', true);
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});
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scatter.dispatch.on('elementMouseout.area', function(e) {
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g.select('.nv-chart-' + id + ' .nv-area-' + e.seriesIndex).classed('hover', false);
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});
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//============================================================
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//Special offset functions
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chart.d3_stackedOffset_stackPercent = function(stackData) {
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var n = stackData.length, //How many series
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m = stackData[0].length, //how many points per series
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k = 1 / n,
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i,
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j,
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o,
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y0 = [];
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for (j = 0; j < m; ++j) { //Looping through all points
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for (i = 0, o = 0; i < dataRaw.length; i++) //looping through series'
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o += getY(dataRaw[i].values[j]) //total value of all points at a certian point in time.
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if (o) for (i = 0; i < n; i++)
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stackData[i][j][1] /= o;
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else
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for (i = 0; i < n; i++)
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stackData[i][j][1] = k;
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}
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for (j = 0; j < m; ++j) y0[j] = 0;
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return y0;
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};
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});
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return chart;
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}
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//============================================================
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// Event Handling/Dispatching (out of chart's scope)
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//------------------------------------------------------------
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scatter.dispatch.on('elementClick.area', function(e) {
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dispatch.areaClick(e);
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})
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scatter.dispatch.on('elementMouseover.tooltip', function(e) {
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e.pos = [e.pos[0] + margin.left, e.pos[1] + margin.top],
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dispatch.tooltipShow(e);
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});
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scatter.dispatch.on('elementMouseout.tooltip', function(e) {
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dispatch.tooltipHide(e);
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});
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//============================================================
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//============================================================
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// Global getters and setters
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//------------------------------------------------------------
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chart.dispatch = dispatch;
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chart.scatter = scatter;
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d3.rebind(chart, scatter, 'interactive', 'size', 'xScale', 'yScale', 'zScale', 'xDomain', 'yDomain', 'xRange', 'yRange',
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'sizeDomain', 'forceX', 'forceY', 'forceSize', 'clipVoronoi', 'useVoronoi','clipRadius','highlightPoint','clearHighlights');
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chart.options = nv.utils.optionsFunc.bind(chart);
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chart.x = function(_) {
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if (!arguments.length) return getX;
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getX = d3.functor(_);
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return chart;
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};
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chart.y = function(_) {
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if (!arguments.length) return getY;
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getY = d3.functor(_);
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return chart;
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}
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chart.margin = function(_) {
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if (!arguments.length) return margin;
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margin.top = typeof _.top != 'undefined' ? _.top : margin.top;
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margin.right = typeof _.right != 'undefined' ? _.right : margin.right;
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margin.bottom = typeof _.bottom != 'undefined' ? _.bottom : margin.bottom;
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margin.left = typeof _.left != 'undefined' ? _.left : margin.left;
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return chart;
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};
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chart.width = function(_) {
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if (!arguments.length) return width;
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width = _;
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return chart;
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};
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chart.height = function(_) {
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if (!arguments.length) return height;
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height = _;
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return chart;
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};
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chart.clipEdge = function(_) {
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if (!arguments.length) return clipEdge;
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clipEdge = _;
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return chart;
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};
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chart.color = function(_) {
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if (!arguments.length) return color;
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color = nv.utils.getColor(_);
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return chart;
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};
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chart.offset = function(_) {
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if (!arguments.length) return offset;
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offset = _;
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return chart;
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};
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chart.order = function(_) {
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if (!arguments.length) return order;
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order = _;
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return chart;
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};
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//shortcut for offset + order
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chart.style = function(_) {
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if (!arguments.length) return style;
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style = _;
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switch (style) {
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case 'stack':
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chart.offset('zero');
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chart.order('default');
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break;
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case 'stream':
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chart.offset('wiggle');
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chart.order('inside-out');
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break;
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case 'stream-center':
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chart.offset('silhouette');
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chart.order('inside-out');
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break;
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case 'expand':
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chart.offset('expand');
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chart.order('default');
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break;
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case 'stack_percent':
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chart.offset(chart.d3_stackedOffset_stackPercent);
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chart.order('default');
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break;
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}
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return chart;
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};
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chart.interpolate = function(_) {
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if (!arguments.length) return interpolate;
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interpolate = _;
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return chart;
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};
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//============================================================
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return chart;
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}
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