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636 lines
19 KiB
JavaScript
636 lines
19 KiB
JavaScript
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nv.models.stackedAreaChart = 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 stacked = nv.models.stackedArea()
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, xAxis = nv.models.axis()
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, yAxis = nv.models.axis()
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, legend = nv.models.legend()
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, controls = nv.models.legend()
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, interactiveLayer = nv.interactiveGuideline()
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;
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var margin = {top: 30, right: 25, bottom: 50, left: 60}
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, width = null
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, height = null
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, color = nv.utils.defaultColor() // a function that takes in d, i and returns color
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, showControls = true
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, showLegend = true
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, showXAxis = true
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, showYAxis = true
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, rightAlignYAxis = false
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, useInteractiveGuideline = false
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, tooltips = true
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, tooltip = function(key, x, y, e, graph) {
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return '<h3>' + key + '</h3>' +
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'<p>' + y + ' on ' + x + '</p>'
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}
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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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, yAxisTickFormat = d3.format(',.2f')
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, state = { style: stacked.style() }
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, defaultState = null
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, noData = 'No Data Available.'
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, dispatch = d3.dispatch('tooltipShow', 'tooltipHide', 'stateChange', 'changeState')
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, controlWidth = 250
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, cData = ['Stacked','Stream','Expanded']
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, controlLabels = {}
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, transitionDuration = 250
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;
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xAxis
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.orient('bottom')
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.tickPadding(7)
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;
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yAxis
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.orient((rightAlignYAxis) ? 'right' : 'left')
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;
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controls.updateState(false);
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//============================================================
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//============================================================
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// Private Variables
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//------------------------------------------------------------
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var showTooltip = function(e, offsetElement) {
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var left = e.pos[0] + ( offsetElement.offsetLeft || 0 ),
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top = e.pos[1] + ( offsetElement.offsetTop || 0),
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x = xAxis.tickFormat()(stacked.x()(e.point, e.pointIndex)),
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y = yAxis.tickFormat()(stacked.y()(e.point, e.pointIndex)),
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content = tooltip(e.series.key, x, y, e, chart);
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nv.tooltip.show([left, top], content, e.value < 0 ? 'n' : 's', null, offsetElement);
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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 container = d3.select(this),
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that = this;
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var availableWidth = (width || parseInt(container.style('width')) || 960)
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- margin.left - margin.right,
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availableHeight = (height || parseInt(container.style('height')) || 400)
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- margin.top - margin.bottom;
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chart.update = function() { container.transition().duration(transitionDuration).call(chart); };
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chart.container = this;
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//set state.disabled
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state.disabled = data.map(function(d) { return !!d.disabled });
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if (!defaultState) {
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var key;
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defaultState = {};
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for (key in state) {
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if (state[key] instanceof Array)
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defaultState[key] = state[key].slice(0);
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else
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defaultState[key] = state[key];
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}
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}
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//------------------------------------------------------------
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// Display No Data message if there's nothing to show.
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if (!data || !data.length || !data.filter(function(d) { return d.values.length }).length) {
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var noDataText = container.selectAll('.nv-noData').data([noData]);
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noDataText.enter().append('text')
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.attr('class', 'nvd3 nv-noData')
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.attr('dy', '-.7em')
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.style('text-anchor', 'middle');
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noDataText
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.attr('x', margin.left + availableWidth / 2)
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.attr('y', margin.top + availableHeight / 2)
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.text(function(d) { return d });
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return chart;
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} else {
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container.selectAll('.nv-noData').remove();
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}
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//------------------------------------------------------------
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//------------------------------------------------------------
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// Setup Scales
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x = stacked.xScale();
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y = stacked.yScale();
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//------------------------------------------------------------
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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-stackedAreaChart').data([data]);
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var gEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-stackedAreaChart').append('g');
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var g = wrap.select('g');
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gEnter.append("rect").style("opacity",0);
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gEnter.append('g').attr('class', 'nv-x nv-axis');
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gEnter.append('g').attr('class', 'nv-y nv-axis');
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gEnter.append('g').attr('class', 'nv-stackedWrap');
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gEnter.append('g').attr('class', 'nv-legendWrap');
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gEnter.append('g').attr('class', 'nv-controlsWrap');
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gEnter.append('g').attr('class', 'nv-interactive');
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g.select("rect").attr("width",availableWidth).attr("height",availableHeight);
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//------------------------------------------------------------
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// Legend
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if (showLegend) {
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var legendWidth = (showControls) ? availableWidth - controlWidth : availableWidth;
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legend
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.width(legendWidth);
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g.select('.nv-legendWrap')
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.datum(data)
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.call(legend);
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if ( margin.top != legend.height()) {
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margin.top = legend.height();
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availableHeight = (height || parseInt(container.style('height')) || 400)
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- margin.top - margin.bottom;
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}
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g.select('.nv-legendWrap')
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.attr('transform', 'translate(' + (availableWidth-legendWidth) + ',' + (-margin.top) +')');
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}
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//------------------------------------------------------------
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//------------------------------------------------------------
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// Controls
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if (showControls) {
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var controlsData = [
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{
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key: controlLabels.stacked || 'Stacked',
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metaKey: 'Stacked',
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disabled: stacked.style() != 'stack',
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style: 'stack'
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},
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{
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key: controlLabels.stream || 'Stream',
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metaKey: 'Stream',
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disabled: stacked.style() != 'stream',
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style: 'stream'
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},
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{
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key: controlLabels.expanded || 'Expanded',
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metaKey: 'Expanded',
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disabled: stacked.style() != 'expand',
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style: 'expand'
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},
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{
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key: controlLabels.stack_percent || 'Stack %',
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metaKey: 'Stack_Percent',
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disabled: stacked.style() != 'stack_percent',
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style: 'stack_percent'
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}
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];
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controlWidth = (cData.length/3) * 260;
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controlsData = controlsData.filter(function(d) {
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return cData.indexOf(d.metaKey) !== -1;
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})
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controls
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.width( controlWidth )
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.color(['#444', '#444', '#444']);
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g.select('.nv-controlsWrap')
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.datum(controlsData)
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.call(controls);
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if ( margin.top != Math.max(controls.height(), legend.height()) ) {
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margin.top = Math.max(controls.height(), legend.height());
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availableHeight = (height || parseInt(container.style('height')) || 400)
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- margin.top - margin.bottom;
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}
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g.select('.nv-controlsWrap')
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.attr('transform', 'translate(0,' + (-margin.top) +')');
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}
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//------------------------------------------------------------
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wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
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if (rightAlignYAxis) {
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g.select(".nv-y.nv-axis")
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.attr("transform", "translate(" + availableWidth + ",0)");
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}
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//------------------------------------------------------------
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// Main Chart Component(s)
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//------------------------------------------------------------
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//Set up interactive layer
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if (useInteractiveGuideline) {
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interactiveLayer
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.width(availableWidth)
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.height(availableHeight)
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.margin({left: margin.left, top: margin.top})
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.svgContainer(container)
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.xScale(x);
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wrap.select(".nv-interactive").call(interactiveLayer);
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}
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stacked
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.width(availableWidth)
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.height(availableHeight)
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var stackedWrap = g.select('.nv-stackedWrap')
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.datum(data);
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stackedWrap.transition().call(stacked);
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//------------------------------------------------------------
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//------------------------------------------------------------
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// Setup Axes
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if (showXAxis) {
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xAxis
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.scale(x)
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.ticks( availableWidth / 100 )
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.tickSize( -availableHeight, 0);
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g.select('.nv-x.nv-axis')
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.attr('transform', 'translate(0,' + availableHeight + ')');
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g.select('.nv-x.nv-axis')
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.transition().duration(0)
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.call(xAxis);
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}
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if (showYAxis) {
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yAxis
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.scale(y)
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.ticks(stacked.offset() == 'wiggle' ? 0 : availableHeight / 36)
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.tickSize(-availableWidth, 0)
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.setTickFormat( (stacked.style() == 'expand' || stacked.style() == 'stack_percent')
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? d3.format('%') : yAxisTickFormat);
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g.select('.nv-y.nv-axis')
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.transition().duration(0)
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.call(yAxis);
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}
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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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stacked.dispatch.on('areaClick.toggle', function(e) {
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if (data.filter(function(d) { return !d.disabled }).length === 1)
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data.forEach(function(d) {
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d.disabled = false;
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});
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else
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data.forEach(function(d,i) {
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d.disabled = (i != e.seriesIndex);
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});
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state.disabled = data.map(function(d) { return !!d.disabled });
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dispatch.stateChange(state);
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chart.update();
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});
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legend.dispatch.on('stateChange', function(newState) {
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state.disabled = newState.disabled;
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dispatch.stateChange(state);
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chart.update();
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});
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controls.dispatch.on('legendClick', function(d,i) {
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if (!d.disabled) return;
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controlsData = controlsData.map(function(s) {
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s.disabled = true;
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return s;
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});
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d.disabled = false;
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stacked.style(d.style);
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state.style = stacked.style();
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dispatch.stateChange(state);
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chart.update();
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});
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interactiveLayer.dispatch.on('elementMousemove', function(e) {
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stacked.clearHighlights();
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var singlePoint, pointIndex, pointXLocation, allData = [];
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data
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.filter(function(series, i) {
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series.seriesIndex = i;
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return !series.disabled;
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})
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.forEach(function(series,i) {
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pointIndex = nv.interactiveBisect(series.values, e.pointXValue, chart.x());
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stacked.highlightPoint(i, pointIndex, true);
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var point = series.values[pointIndex];
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if (typeof point === 'undefined') return;
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if (typeof singlePoint === 'undefined') singlePoint = point;
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if (typeof pointXLocation === 'undefined') pointXLocation = chart.xScale()(chart.x()(point,pointIndex));
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//If we are in 'expand' mode, use the stacked percent value instead of raw value.
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var tooltipValue = (stacked.style() == 'expand') ? point.display.y : chart.y()(point,pointIndex);
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allData.push({
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key: series.key,
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value: tooltipValue,
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color: color(series,series.seriesIndex),
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stackedValue: point.display
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});
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});
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allData.reverse();
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//Highlight the tooltip entry based on which stack the mouse is closest to.
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if (allData.length > 2) {
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var yValue = chart.yScale().invert(e.mouseY);
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var yDistMax = Infinity, indexToHighlight = null;
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allData.forEach(function(series,i) {
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//To handle situation where the stacked area chart is negative, we need to use absolute values
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//when checking if the mouse Y value is within the stack area.
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yValue = Math.abs(yValue);
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var stackedY0 = Math.abs(series.stackedValue.y0);
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var stackedY = Math.abs(series.stackedValue.y);
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if ( yValue >= stackedY0 && yValue <= (stackedY + stackedY0))
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{
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indexToHighlight = i;
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return;
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}
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});
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if (indexToHighlight != null)
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allData[indexToHighlight].highlight = true;
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}
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var xValue = xAxis.tickFormat()(chart.x()(singlePoint,pointIndex));
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//If we are in 'expand' mode, force the format to be a percentage.
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var valueFormatter = (stacked.style() == 'expand') ?
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function(d,i) {return d3.format(".1%")(d);} :
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function(d,i) {return yAxis.tickFormat()(d); };
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interactiveLayer.tooltip
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.position({left: pointXLocation + margin.left, top: e.mouseY + margin.top})
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.chartContainer(that.parentNode)
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.enabled(tooltips)
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.valueFormatter(valueFormatter)
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.data(
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{
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value: xValue,
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series: allData
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}
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)();
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interactiveLayer.renderGuideLine(pointXLocation);
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});
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interactiveLayer.dispatch.on("elementMouseout",function(e) {
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dispatch.tooltipHide();
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stacked.clearHighlights();
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});
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dispatch.on('tooltipShow', function(e) {
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if (tooltips) showTooltip(e, that.parentNode);
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});
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// Update chart from a state object passed to event handler
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dispatch.on('changeState', function(e) {
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if (typeof e.disabled !== 'undefined') {
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data.forEach(function(series,i) {
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series.disabled = e.disabled[i];
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});
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state.disabled = e.disabled;
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}
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if (typeof e.style !== 'undefined') {
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stacked.style(e.style);
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}
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chart.update();
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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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stacked.dispatch.on('tooltipShow', function(e) {
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//disable tooltips when value ~= 0
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//// TODO: consider removing points from voronoi that have 0 value instead of this hack
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/*
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if (!Math.round(stacked.y()(e.point) * 100)) { // 100 will not be good for very small numbers... will have to think about making this valu dynamic, based on data range
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setTimeout(function() { d3.selectAll('.point.hover').classed('hover', false) }, 0);
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return false;
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}
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*/
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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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stacked.dispatch.on('tooltipHide', function(e) {
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dispatch.tooltipHide(e);
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});
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dispatch.on('tooltipHide', function() {
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if (tooltips) nv.tooltip.cleanup();
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});
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//============================================================
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//============================================================
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// Expose Public Variables
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//------------------------------------------------------------
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// expose chart's sub-components
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chart.dispatch = dispatch;
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chart.stacked = stacked;
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chart.legend = legend;
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chart.controls = controls;
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chart.xAxis = xAxis;
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chart.yAxis = yAxis;
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chart.interactiveLayer = interactiveLayer;
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d3.rebind(chart, stacked, 'x', 'y', 'size', 'xScale', 'yScale', 'xDomain', 'yDomain', 'xRange', 'yRange', 'sizeDomain', 'interactive', 'useVoronoi', 'offset', 'order', 'style', 'clipEdge', 'forceX', 'forceY', 'forceSize', 'interpolate');
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chart.options = nv.utils.optionsFunc.bind(chart);
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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.color = function(_) {
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if (!arguments.length) return color;
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color = nv.utils.getColor(_);
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legend.color(color);
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stacked.color(color);
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return chart;
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};
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chart.showControls = function(_) {
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if (!arguments.length) return showControls;
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showControls = _;
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return chart;
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};
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chart.showLegend = function(_) {
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if (!arguments.length) return showLegend;
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showLegend = _;
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return chart;
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};
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chart.showXAxis = function(_) {
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if (!arguments.length) return showXAxis;
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showXAxis = _;
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return chart;
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};
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chart.showYAxis = function(_) {
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if (!arguments.length) return showYAxis;
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showYAxis = _;
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return chart;
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};
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chart.rightAlignYAxis = function(_) {
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if(!arguments.length) return rightAlignYAxis;
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rightAlignYAxis = _;
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yAxis.orient( (_) ? 'right' : 'left');
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return chart;
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};
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chart.useInteractiveGuideline = function(_) {
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if(!arguments.length) return useInteractiveGuideline;
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useInteractiveGuideline = _;
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if (_ === true) {
|
|
chart.interactive(false);
|
|
chart.useVoronoi(false);
|
|
}
|
|
return chart;
|
|
};
|
|
|
|
chart.tooltip = function(_) {
|
|
if (!arguments.length) return tooltip;
|
|
tooltip = _;
|
|
return chart;
|
|
};
|
|
|
|
chart.tooltips = function(_) {
|
|
if (!arguments.length) return tooltips;
|
|
tooltips = _;
|
|
return chart;
|
|
};
|
|
|
|
chart.tooltipContent = function(_) {
|
|
if (!arguments.length) return tooltip;
|
|
tooltip = _;
|
|
return chart;
|
|
};
|
|
|
|
chart.state = function(_) {
|
|
if (!arguments.length) return state;
|
|
state = _;
|
|
return chart;
|
|
};
|
|
|
|
chart.defaultState = function(_) {
|
|
if (!arguments.length) return defaultState;
|
|
defaultState = _;
|
|
return chart;
|
|
};
|
|
|
|
chart.noData = function(_) {
|
|
if (!arguments.length) return noData;
|
|
noData = _;
|
|
return chart;
|
|
};
|
|
|
|
chart.transitionDuration = function(_) {
|
|
if (!arguments.length) return transitionDuration;
|
|
transitionDuration = _;
|
|
return chart;
|
|
};
|
|
|
|
chart.controlsData = function(_) {
|
|
if (!arguments.length) return cData;
|
|
cData = _;
|
|
return chart;
|
|
};
|
|
|
|
chart.controlLabels = function(_) {
|
|
if (!arguments.length) return controlLabels;
|
|
if (typeof _ !== 'object') return controlLabels;
|
|
controlLabels = _;
|
|
return chart;
|
|
};
|
|
|
|
yAxis.setTickFormat = yAxis.tickFormat;
|
|
|
|
yAxis.tickFormat = function(_) {
|
|
if (!arguments.length) return yAxisTickFormat;
|
|
yAxisTickFormat = _;
|
|
return yAxis;
|
|
};
|
|
|
|
|
|
//============================================================
|
|
|
|
return chart;
|
|
}
|