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303 lines
8.6 KiB
JavaScript
303 lines
8.6 KiB
JavaScript
nv.models.pieChart = function() {
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//============================================================
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// Public Variables with Default Settings
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//------------------------------------------------------------
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var pie = nv.models.pie()
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, legend = nv.models.legend()
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;
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var margin = {top: 30, right: 20, bottom: 20, left: 20}
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, width = null
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, height = null
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, showLegend = true
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, color = nv.utils.defaultColor()
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, tooltips = true
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, tooltip = function(key, y, e, graph) {
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return '<h3>' + key + '</h3>' +
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'<p>' + y + '</p>'
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}
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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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;
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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 tooltipLabel = pie.description()(e.point) || pie.x()(e.point)
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var left = e.pos[0] + ( (offsetElement && offsetElement.offsetLeft) || 0 ),
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top = e.pos[1] + ( (offsetElement && offsetElement.offsetTop) || 0),
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y = pie.valueFormat()(pie.y()(e.point)),
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content = tooltip(tooltipLabel, 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() { chart(selection); };
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chart.container = this;
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//set state.disabled
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state.disabled = data[0].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[0] || !data[0].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 containers and skeleton of chart
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var wrap = container.selectAll('g.nv-wrap.nv-pieChart').data([data]);
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var gEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-pieChart').append('g');
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var g = wrap.select('g');
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gEnter.append('g').attr('class', 'nv-pieWrap');
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gEnter.append('g').attr('class', 'nv-legendWrap');
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//------------------------------------------------------------
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//------------------------------------------------------------
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// Legend
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if (showLegend) {
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legend
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.width( availableWidth )
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.key(pie.x());
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wrap.select('.nv-legendWrap')
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.datum(pie.values()(data[0]))
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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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//------------------------------------------------------------
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// Main Chart Component(s)
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pie
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.width(availableWidth)
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.height(availableHeight);
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var pieWrap = g.select('.nv-pieWrap')
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.datum(data);
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d3.transition(pieWrap).call(pie);
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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('legendClick', function(d,i, that) {
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d.disabled = !d.disabled;
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if (!pie.values()(data[0]).filter(function(d) { return !d.disabled }).length) {
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pie.values()(data[0]).map(function(d) {
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d.disabled = false;
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wrap.selectAll('.nv-series').classed('disabled', false);
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return d;
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});
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}
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state.disabled = data[0].map(function(d) { return !!d.disabled });
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dispatch.stateChange(state);
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selection.transition().call(chart)
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});
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pie.dispatch.on('elementMouseout.tooltip', function(e) {
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dispatch.tooltipHide(e);
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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[0].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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selection.call(chart);
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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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pie.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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dispatch.on('tooltipShow', function(e) {
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if (tooltips) showTooltip(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.legend = legend;
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chart.dispatch = dispatch;
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chart.pie = pie;
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d3.rebind(chart, pie, 'valueFormat', 'values', 'x', 'y', 'description', 'id', 'showLabels', 'donutLabelsOutside', 'pieLabelsOutside', 'donut', 'donutRatio', 'labelThreshold');
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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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pie.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.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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//============================================================
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return chart;
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}
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