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energy spline stack

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This commit is contained in:
Eric Hulburd
2016-02-15 16:09:40 -06:00
parent 1758fce5a4
commit 9ea4a8ebe9
7 changed files with 106 additions and 141 deletions
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97
client/d3/line/spline_stack.js vendored
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@@ -5,85 +5,78 @@ const INTERPOLATION = 'cardinal';
// inspired by https://bl.ocks.org/mbostock/3885211
class SplineStackChart extends LineChart {
init(){
var spline_stack = this;
spline_stack.svg = d3.select(spline_stack.container).append("svg")
.attr("width", spline_stack.outer_width)
.attr("height", spline_stack.outer_height)
.append("g")
.attr("transform", "translate(" + spline_stack.margin.left + "," + spline_stack.margin.top + ")");
spline_stack.area = d3.svg.area.interpolate(INTERPOLATION)
.x(function(d, i) { return spline_stack.x_scale(d.x); })
.y0(function(d) { return spline_stack.y_scale(d.y0); })
.y1(function(d) { return spline_stack.y_scale(d.y0 + d.y); });
spline_stack.stack = d3.layout.stack()
.values(function(d) { return d.values; });
// function that returns unique color based on series_title.
spline_stack.color = d3.scale.category20();
spline_stack.defineAxes();
get chart_options(){
return Object.assign(LineChart.DEFAULTS, {
interpolation: INTERPOLATION
});
}
get chart_options(){
return {
interpolation: INTERPOLATION
};
afterAxes(){
var spline_stack = this;
spline_stack.fnArea = d3.svg.area()
.x(function(d, i) { return spline_stack.x_scale(d.x); })
.y0(function(d) { return spline_stack.y_scale(d.y0); })
.y1(function(d) { return spline_stack.y_scale(d.y0 + d.y); })
.interpolate(spline_stack.interpolation);
spline_stack.fnStack = d3.layout.stack()
.values(function(d) { return d.values; });
// function that returns unique color based on series_title.
spline_stack.fnColor = d3.scale.category20();
}
serializeData(data){
var spline_stack = this,
serialized_data = {
range_min: -Infinity,
range_max: Infinity,
domain_min: -Infinity,
domain_max: Infinity };
series: [] };
data.series.forEach(function(series, i){
series.css_class = series.css_class || spline_stack.toClass ? spline_stack.toClass(series) : "";
series.title = series.title || spline_stack.toClass ? spline_stack.titleize(series) : "";
series.xy_values = series.values.map((value)=>{
series_data.range_min = Math.min(series_data.range_min, value[line_chart.range_attr]);
series_data.range_max = Math.max(series_data.range_max, value[line_chart.range_attr]);
series_data.domain_min = Math.min(series_data.domain_min, value[line_chart.domain_attr]);
series_data.domain_max = Math.max(series_data.domain_max, value[line_chart.domain_attr]);
return {x: value[spline_stack.domain_attr], y: value[spline_stack.range_attr]};
});
if (spline_stack.domain_attr !== 'x' && spline_stack.range_attr !== 'y'){
series.values = series.values.map((value)=>{
return {x: value[spline_stack.domain_attr], y: value[spline_stack.range_attr], series: series};
});
}
serialized_data.series.push(series);
});
serialized_data.series = spline_stack.fnStack(serialized_data.series);
// assume all series have same domain, use first series to establish extent.
serialized_data.domain_extent = d3.extent(serialized_data.series[0].values.map((value)=>{ return value.x; }));
// final series will have the highest y values.
serialized_data.range_max = d3.max(serialized_data.series[serialized_data.series.length - 1].values.map((value)=>{ return value.y0 + value.y; }))
return serialized_data;
};
drawData(data){
var spline_stack = this;
data = spline_stack.serialize_data;
data = spline_stack.serializeData(data);
// calibrate axes.
bar_chart.y_scale.domain([Math.min(0, data.range_min), data.range_max]);
bar_chart.svg.select(".d3-chart-range.d3-chart-axis")
.call(bar_chart.y_axis);
spline_stack.y_scale.domain([0, data.range_max]);
spline_stack.svg.select(".d3-chart-range.d3-chart-axis")
.call(spline_stack.y_axis);
bar_chart.x_scale.domain([Math.min(data.domain_min), data.domain_max]);
bar_chart.svg.select(".d3-chart-domain.d3-chart-axis").call(bar_chart.x_axis);
spline_stack.x_scale.domain(data.domain_extent);
spline_stack.svg.select(".d3-chart-domain.d3-chart-axis").call(spline_stack.x_axis);
var stack_data = spline_stack.stack(data.series),
stack = svg.selectAll(".d3-chart-spline-stack")
.data(stack_data);
[stack.enter().append("g"), stack.transition()].forEach((groups)=>{
applyData(groups);
var stack = spline_stack.svg.selectAll(".d3-chart-spline-stack")
.data(data.series);
[stack.enter().append("path"), stack.transition()].forEach((paths)=>{
spline_stack.applyData(paths);
});
stack.exit().remove();
}
applyData(groups){
applyData(paths){
var spline_stack = this;
groups
paths
.attr("class", function(series){"d3-chart-spline-stack " + series.css_class;})
.append("path")
.attr("d", function(series){ return spline_stack.area(series.xy_values); })
.style("fill", function(series){ return spline_stack.color(series.name); });
.attr("d", function(series){ return spline_stack.fnArea(series.values); })
.style("fill", function(series){ return spline_stack.fnColor(series.title); });
}
}
export default SplineStackChart;