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466 lines
14 KiB
JavaScript
466 lines
14 KiB
JavaScript
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nv.models.lineChart = 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 lines = nv.models.line()
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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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, interactiveLayer = nv.interactiveGuideline()
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;
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var margin = {top: 30, right: 20, bottom: 50, left: 60}
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, color = nv.utils.defaultColor()
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, width = null
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, height = null
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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 + ' at ' + x + '</p>'
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}
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, x
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, y
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, state = {}
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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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, 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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//============================================================
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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()(lines.x()(e.point, e.pointIndex)),
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y = yAxis.tickFormat()(lines.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, null, 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 noData 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 = lines.xScale();
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y = lines.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-lineChart').data([data]);
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var gEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-lineChart').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-linesWrap');
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gEnter.append('g').attr('class', 'nv-legendWrap');
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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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legend.width(availableWidth);
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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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wrap.select('.nv-legendWrap')
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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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lines
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.width(availableWidth)
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.height(availableHeight)
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.color(data.map(function(d,i) {
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return d.color || color(d, i);
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}).filter(function(d,i) { return !data[i].disabled }));
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var linesWrap = g.select('.nv-linesWrap')
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.datum(data.filter(function(d) { return !d.disabled }))
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linesWrap.transition().call(lines);
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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,' + y.range()[0] + ')');
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g.select('.nv-x.nv-axis')
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.transition()
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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( availableHeight / 36 )
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.tickSize( -availableWidth, 0);
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g.select('.nv-y.nv-axis')
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.transition()
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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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legend.dispatch.on('stateChange', function(newState) {
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state = newState;
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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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lines.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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lines.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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allData.push({
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key: series.key,
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value: chart.y()(point, pointIndex),
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color: color(series,series.seriesIndex)
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});
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});
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//Highlight the tooltip entry based on which point 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 domainExtent = Math.abs(chart.yScale().domain()[0] - chart.yScale().domain()[1]);
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var threshold = 0.03 * domainExtent;
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var indexToHighlight = nv.nearestValueIndex(allData.map(function(d){return d.value}),yValue,threshold);
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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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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(function(d,i) {
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return yAxis.tickFormat()(d);
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})
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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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lines.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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dispatch.on('changeState', function(e) {
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if (typeof e.disabled !== 'undefined' && data.length === e.disabled.length) {
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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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chart.update();
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});
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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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lines.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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lines.dispatch.on('elementMouseout.tooltip', 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.lines = lines;
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chart.legend = legend;
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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, lines, 'defined', 'isArea', 'x', 'y', 'size', 'xScale', 'yScale', 'xDomain', 'yDomain', 'xRange', 'yRange'
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, 'forceX', 'forceY', 'interactive', 'clipEdge', 'clipVoronoi', 'useVoronoi','id', '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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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) {
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chart.interactive(false);
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chart.useVoronoi(false);
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}
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return chart;
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};
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chart.tooltips = function(_) {
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if (!arguments.length) return tooltips;
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tooltips = _;
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return chart;
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};
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chart.tooltipContent = function(_) {
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if (!arguments.length) return tooltip;
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tooltip = _;
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return chart;
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};
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chart.state = function(_) {
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if (!arguments.length) return state;
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state = _;
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return chart;
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};
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chart.defaultState = function(_) {
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if (!arguments.length) return defaultState;
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defaultState = _;
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return chart;
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};
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chart.noData = function(_) {
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if (!arguments.length) return noData;
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noData = _;
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return chart;
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};
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chart.transitionDuration = function(_) {
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if (!arguments.length) return transitionDuration;
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transitionDuration = _;
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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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