File indexing completed on 2024-05-19 06:00:30

 
 function makeLineChart(dataset, xName, yObjs, axisLables) {
     var chartObj = {};
   
     var color = d3.scaleOrdinal().range(["#1F77B4", "#aec7e8", "#ff7f0e", "#ffbb78", "#2ca02c"
         ,"#98df8a","#d62728","#ff9896","#9467bd","#c5b0d5"
         ,"#8c564b","#c49c94","#e377c2","#f7b6d2","#7f7f7f"
         ,"#c7c7c7","#bcbd22","#dbdb8d","#17becf","#9edae5"
         ,"#393b79","#5254a3","#6b6ecf","#9c9ede","#637939"
         ,"#b5cf6b","#cedb9c","#8c6d31","#bd9e39","#e7ba52"
         ,"#ad494a","#d6616b","#7b4173","#a55194","#ce6dbd"]);
     chartObj.xAxisLable = axisLables.xAxis;
     chartObj.yAxisLable = axisLables.yAxis;
     /*
      yObjsects format:
      {y1:{column:'',name:'name',color:'color'},y2}
      */
 
     chartObj.data = dataset;
     chartObj.margin = {top: 15, right: 60, bottom: 30, left: 50};
     chartObj.width = 650 - chartObj.margin.left - chartObj.margin.right;
     chartObj.height = 480 - chartObj.margin.top - chartObj.margin.bottom;
 
 // So we can pass the x and y as strings when creating the function
     chartObj.xFunct = function(d){return d[xName]};
  
 // For each yObjs argument, create a yFunction
     function getYFn(column) {
         return function (d) {
             return d[column];
         };
     }
 
 // Object instead of array
     chartObj.yFuncts = [];
     for (var y  in yObjs) {
         yObjs[y].name = y;
         yObjs[y].yFunct = getYFn(yObjs[y].column); //Need this  list for the ymax function
         chartObj.yFuncts.push(yObjs[y].yFunct);
     }
 
 //Formatter functions for the axes
     chartObj.formatAsNumber = d3.format(".0f");
     chartObj.formatAsDecimal = d3.format(".2f");
     chartObj.formatAsCurrency = d3.format("$.2f");
     chartObj.formatAsYYYYMM = d3.timeFormat("%Y-%m");
     
     chartObj.formatAsFloat = function (d) {
         if (d % 1 !== 0) {
             return d3.format(".2f")(d);
         } else {
             return d3.format(".0f")(d);
         }
         
     };
 
     chartObj.xFormatter = chartObj.formatAsYYYYMM;
     chartObj.yFormatter = chartObj.formatAsFloat;
 
     chartObj.bisectYear = d3.bisector(chartObj.xFunct).left; //< Can be overridden in definition
 
 //Create scale functions
     chartObj.xScale = d3.scaleLinear().range([0, chartObj.width]).domain(d3.extent(chartObj.data, chartObj.xFunct)); 
     //chartObj.xScale = d3.scaleTime().range([0, chartObj.width]).domain(d3.extent(chartObj.data, chartObj.xFunct));                                                  
 
 // Get the max of every yFunct
     chartObj.max = function (fn) {
         return d3.max(chartObj.data, fn);
     };
     chartObj.yScale = d3.scaleLinear().range([chartObj.height, 0]).domain([0, d3.max(chartObj.yFuncts.map(chartObj.max))]);
 
     chartObj.formatAsYear = d3.format("");
 
 //Create axis
 
     chartObj.xAxis  = d3.axisBottom(chartObj.xScale).tickFormat(chartObj.xFormatter);
     chartObj.yAxis = d3.axisLeft(chartObj.yScale).tickFormat(chartObj.yFormatter);
 
 
 // Build line building functions
     function getYScaleFn(yObj) {
         return function (d) {
             return chartObj.yScale(yObjs[yObj].yFunct(d));
         };
     }
 
     for (var yObj in yObjs) {
         yObjs[yObj].line = d3.line().x(function (d) {
             return chartObj.xScale(chartObj.xFunct(d));
         }).y(getYScaleFn(yObj));
     }
     
 
     chartObj.svg;
 
 // Change chart size according to window size
     chartObj.update_svg_size = function () {
         chartObj.width = parseInt(chartObj.chartDiv.style("width"), 10) - (chartObj.margin.left + chartObj.margin.right);
 
         chartObj.height = parseInt(chartObj.chartDiv.style("height"), 10) - (chartObj.margin.top + chartObj.margin.bottom);
 
         /* Update the range of the scale with new width/height */
         chartObj.xScale.range([0, chartObj.width]);
         chartObj.yScale.range([chartObj.height, 0]);
 
         if (!chartObj.svg) {return false;}
 
         /* Else Update the axis with the new scale */
         chartObj.svg.select('.x.axis').attr("transform", "translate(0," + chartObj.height + ")").call(chartObj.xAxis);
         chartObj.svg.select('.x.axis .label').attr("x", chartObj.width / 2);
 
         chartObj.svg.select('.y.axis').call(chartObj.yAxis);
         chartObj.svg.select('.y.axis .label').attr("x", -chartObj.height / 2);
 
         /* Force D3 to recalculate and update the line */
         for (var y  in yObjs) {
             yObjs[y].path.attr("d", yObjs[y].line);
         }
         
 
         d3.selectAll(".focus.line").attr("y2", chartObj.height);
 
         chartObj.chartDiv.select('svg').attr("width", chartObj.width + (chartObj.margin.left + chartObj.margin.right)).attr("height", chartObj.height + (chartObj.margin.top + chartObj.margin.bottom));
 
         chartObj.svg.select(".overlay").attr("width", chartObj.width).attr("height", chartObj.height);
         return chartObj;
     };
 
     chartObj.bind = function (selector) {
         chartObj.mainDiv = d3.select(selector);
         // Add all the divs to make it centered and responsive
         chartObj.mainDiv.append("div").attr("class", "inner-wrapper").append("div").attr("class", "outer-box").append("div").attr("class", "inner-box");
         chartSelector = selector + " .inner-box";
         chartObj.chartDiv = d3.select(chartSelector);
         d3.select(window).on('resize.' + chartSelector, chartObj.update_svg_size);
         chartObj.update_svg_size();
         return chartObj;
     };
 
 // Render the chart
     chartObj.render = function () {
         //Create SVG element
         chartObj.svg = chartObj.chartDiv.append("svg").attr("class", "chart-area").attr("width", chartObj.width + (chartObj.margin.left + chartObj.margin.right)).attr("height", chartObj.height + (chartObj.margin.top + chartObj.margin.bottom)).append("g").attr("transform", "translate(" + chartObj.margin.left + "," + chartObj.margin.top + ")");
 
         // Draw Lines
         for (var y  in yObjs) {
             yObjs[y].path = chartObj.svg.append("path").datum(chartObj.data).attr("class", "line").attr("d", yObjs[y].line).style("stroke", color(y)).attr("data-series", y).on("mouseover", function () {
                 focus.style("display", null);
             }).on("mouseout", function () {
                 focus.transition().delay(700).style("display", "none");
             }).on("mousemove", mousemove);
         }
         
 
         // .selectAll("text")
         //     .attr("y", 0)
         //     .attr("x", 9)
         //     .attr("dy", ".35em")
         //     .attr("transform", "rotate(90)")
         //     .style("text-anchor", "start")
 
         // Draw Axis
         chartObj.svg.append("g").attr("class", "x axis").attr("transform", "translate(0," + chartObj.height + ")").call(chartObj.xAxis).append("text").attr("class", "label").attr("x", chartObj.width / 2).attr("y", 30).style("text-anchor", "middle").text(chartObj.xAxisLable);
             
 
 
         chartObj.svg.append("g").attr("class", "y axis").call(chartObj.yAxis).append("text").attr("class", "label").attr("transform", "rotate(-90)").attr("y", -42).attr("x", -chartObj.height / 2).attr("dy", ".71em").style("text-anchor", "middle").text(chartObj.yAxisLable);
 
         //Draw tooltips
         var focus = chartObj.svg.append("g").attr("class", "focus").style("display", "none");
 
 
         for (var y  in yObjs) {
             yObjs[y].tooltip = focus.append("g");
             yObjs[y].tooltip.append("circle").attr("r", 5);
             yObjs[y].tooltip.append("rect").attr("x", 8).attr("y","-5").attr("width",22).attr("height",'0.75em');
             yObjs[y].tooltip.append("text").attr("x", 9).attr("dy", ".35em");
         }
 
         // Year label
         focus.append("text").attr("class", "focus year").attr("x", 9).attr("y", 7);
         // Focus line
         focus.append("line").attr("class", "focus line").attr("y1", 0).attr("y2", chartObj.height);
 
         //Draw legend
         var legend = chartObj.mainDiv.append('div').attr("class", "legend");
         for (var y  in yObjs) {
             series = legend.append('div');
             series.append('div').attr("class", "series-marker").style("background-color", color(y));
             series.append('p').text(y);
             yObjs[y].legend = series;
         }
 
         // Overlay to capture hover
         chartObj.svg.append("rect").attr("class", "overlay").attr("width", chartObj.width).attr("height", chartObj.height).on("mouseover", function () {
             focus.style("display", null);
         }).on("mouseout", function () {
             focus.style("display", "none");
         }).on("mousemove", mousemove);
 
         return chartObj;
         function mousemove() {
             
             var x0 = chartObj.xScale.invert(d3.mouse(this)[0]), i = chartObj.bisectYear(dataset, x0, 1), d0 = chartObj.data[i - 1], d1 = chartObj.data[i];
 
             try {
                 var d = x0 - chartObj.xFunct(d0) > chartObj.xFunct(d1) - x0 ? d1 : d0;
 
             } catch (e) {  console.log(e); return;}
             minY = chartObj.height;
             for (var y  in yObjs) {
                 yObjs[y].tooltip.attr("transform", "translate(" + chartObj.xScale(chartObj.xFunct(d)) + "," + chartObj.yScale(yObjs[y].yFunct(d)) + ")");
                 yObjs[y].tooltip.select("text").text(chartObj.yFormatter(yObjs[y].yFunct(d)));
                 minY = Math.min(minY, chartObj.yScale(yObjs[y].yFunct(d)));
             }
 
             focus.select(".focus.line").attr("transform", "translate(" + chartObj.xScale(chartObj.xFunct(d)) + ")").attr("y1", minY);
             focus.select(".focus.year").text("Yearmonth: " + chartObj.xFormatter(chartObj.xFunct(d)));
         }
 
     };
     return chartObj;
 }