From 810748d747194b50fde9c80d2145846e6352f9f3 Mon Sep 17 00:00:00 2001
From: Eric Hulburd <eric@arbol.org>
Date: Mon, 15 Feb 2016 18:51:55 -0600
Subject: [PATCH] add composite line charts

---
 client/d3/bar/composite.js | 135 +++++++++++++++++++++++++++++++++++++
 client/d3/base.js          |  59 +++++++++++++++-
 client/d3/line/line.js     |  34 +++++-----
 3 files changed, 210 insertions(+), 18 deletions(-)
 create mode 100644 client/d3/bar/composite.js

diff --git a/client/d3/bar/composite.js b/client/d3/bar/composite.js
new file mode 100644
index 0000000..3b41cb9
--- /dev/null
+++ b/client/d3/bar/composite.js
@@ -0,0 +1,135 @@
+import Chart from './../base';
+
+class BarLineChart extends Chart {
+
+  get chart_options(){
+    return Object.assign(Chart.DEFAULTS, {
+    });
+  }
+
+  afterAxes(){
+    var chart = this;
+    line_chart.fnLine = d3.svg.line()
+      .interpolate(line_chart.chart_options.interpolation)
+      .x(function(d){ return line_chart.x_scale(d[line_chart.domain_attr]); })
+      .y(function(d){ return line_chart.y_scale_right(d[line_chart.line_attr]); });
+  }
+
+  defineAxes(){
+    var chart = this;
+
+    // Axes Left
+    chart.y_scale_left = d3.scale.linear()
+      .range([chart.height, 0]);
+    chart.y_axis_left = d3.svg.axis()
+      .scale(chart.y_scale_left)
+      .orient("left")
+      .outerTickSize(0);
+
+    // Axes Right
+    chart.y_scale_right = d3.scale.linear()
+      .range([chart.height, 0]);
+    chart.y_axis_left = d3.svg.axis()
+      .scale(chart.y_scale_right)
+      .orient("right")
+      .outerTickSize(0);
+
+    chart.x_scale = d3.scale.ordinal()
+      .rangeRoundBands([chart.height, 0], 0.1);
+
+    chart.x_axis = d3.svg.axis()
+      .scale(chart.x_scale)
+      .orient("bottom")
+      .outerTickSize(0)
+    //chart.x_axis.tickFormat(d3.time.format('%b %d at %H'))
+    //chart.x_axis.ticks(d3.time.hour, 12);
+
+    // append axis groups.
+    chart.svg.append("g")
+        .attr("class", "d3-chart-range d3-chart-range-left d3-chart-axis");
+    chart.svg.append("g")
+        .attr("class", "d3-chart-range d3-chart-range-right d3-chart-axis");
+    chart.svg.append("g")
+        .attr("class", "d3-chart-domain d3-chart-axis")
+        .attr("transform", "translate(0, " + (chart.height) + ")");
+  }
+
+  defineDomain(domain){
+    var chart = this;
+
+    chart.domain = domain;
+    chart.x_scale.domain(domain);
+    chart.svg.select(".d3-chart-domain")
+      .call(chart.x_axis);
+      .selectAll("text")
+          .attr("transform", function(){
+            var elem = this,
+                bbox = elem.getBBox(),
+                middleX = bbox.x + (bbox.width / 2),
+                middleY = bbox.y + (bbox.height / 2);
+            return "rotate(-30," + middleX + "," + middleY + ")";
+          });
+  }
+
+  drawBarData(data){
+    var chart = this;
+    data = chart.serializeBarData(data);
+
+    chart.y_scale_left.domain(data.range_extent);
+    chart.svg.select(".d3-chart-range").call(chart.y_axis_left);
+
+    data.series.forEach(function(series){
+      var filtered_values = series.values.filter((value){ return chart.domain.indexOf(value[chart.domain_attr]) < 0; })
+        bars = chart.svg.selectAll(".d3-chart-bar")
+          .data(series.values);
+      chart.applyData(series, bars.enter().append("rect"));
+      chart.applyData(series, bars.transition());
+      bars.exit().remove();
+    });
+  }
+
+  // helper method for drawData
+  applyBarData(series, elements){
+    var chart = this,
+        series_class = "d3-chart-bar " + series.css_class;
+      elements
+          .attr("class", function(d){ return series_class + " " + d.css_class; })
+          .attr("title", function(d){ return d.title; })
+          .attr("width", chart.x_scale.rangeBand())
+          .attr("x", chart.x_scale(series.title))
+          .attr("height", return chart.y_scale(d[chart.bar_attr]))
+          .attr("y", function(d) { return chart.y_scale(d.cummulative); })
+          .attr('fill', function(d){ return chart.fnColor(d.title); });
+  }
+
+  drawLineData(data){
+    var chart = this,
+      nested_extent = chart.nestedExtent(data.series, 'values', chart.domain_attr, chart.line_attr);
+
+    // calibrate axes
+    bar_chart.y_scale_right.domain([Math.min(0, nested_extent.range_min), nested_extent.range_max]);
+    bar_chart.svg.select(".d3-chart-range-right")
+      .call(bar_chart.y_axis_right);
+
+    // draw lines
+    var line = g.selectAll(".d3-chart-line")
+        .data(data.series);
+
+    [line.enter().append('g'), line.transition()].forEach((groups)=>{
+      line_chart.applyLineData(groups, data.series);
+    });
+    line.exit().remove();
+  }
+
+  applyLineData(groups){
+    var chart = this;
+    groups
+      .attr('class', function(series){ return "d3-chart-line " + chart.cssClass(series); })
+      .attr("title", function(series){ return series.title; })
+      .append("path")
+        .attr("d", function(series){ return chart.fnLine(series.values.filter((value)=>{ return chart.domain.indexOf(value[chart.domain_attr]) < 0; })); })
+        .style("stroke", function(series){ return line_chart.fnColor(series.title); });
+
+  }
+
+}
diff --git a/client/d3/base.js b/client/d3/base.js
index 2da3768..8730d89 100644
--- a/client/d3/base.js
+++ b/client/d3/base.js
@@ -21,7 +21,7 @@ const DEFAULTS = {
     }
     return array.join(' ');
   },
-  toClass: function(series){
+  toCssClass: function(series){
     return series ? series.title.toLowerCase().replace(/\s+/g, '-') : "";
   }
 };
@@ -45,6 +45,63 @@ class Chart {
     if (chart.afterAxes) chart.afterAxes();
   }
 
+  defineAxes(){
+    var chart = this;
+
+    chart.y_scale = d3.scale.linear()
+      .range([chart.height, 0]);
+    chart.y_axis = d3.svg.axis()
+      .scale(chart.y_scale)
+      .orient("left")
+      .outerTickSize(1);
+
+    if (chart.time_series){
+      chart.x_scale = d3.time.scale()
+        .range([0, chart.width]);
+    } else {
+      chart.x_scale = d3.scale.linear()
+        .range([0, chart.width]);
+    }
+
+    chart.x_axis = d3.svg.axis()
+      .scale(chart.x_scale)
+      .orient("bottom")
+      .outerTickSize(0)
+    //chart.x_axis.tickFormat(d3.time.format('%b %d at %H'))
+    //chart.x_axis.ticks(d3.time.hour, 12);
+
+    // append axes
+    chart.svg.append("g")
+        .attr("class", "d3-chart-range d3-chart-axis");
+    chart.svg.append("g")
+        .attr("class", "d3-chart-domain d3-chart-axis")
+        .attr("transform", "translate(0, " + (chart.height) + ")");
+  }
+
+  cssClass(series){
+    var chart = this;
+    if (!chart.toCssClass) return '';
+    return chart.toCssClass(series);
+  }
+
+  nestedExtent(a, series_values, domain_attr, range_attr){
+    var extent = {
+      min_domain: Infinity,
+      max_domain: -Infinity,
+      min_range: Infinity,
+      max_range: -Infinity
+    };
+    a.forEach((series)=>{
+      series[series_values].forEach((value)=>{
+        extent.min_domain = Math.min(min_domain, value[domain_attr]);
+        extent.max_domain = Math.max(max_domain, value[domain_attr]);
+        extent.min_range = Math.min(min_range, value[range_attr]);
+        extent.max_range = Math.max(max_range, value[range_attr]);
+      });
+    });
+    returnextent
+  }
+
 }
 
 Chart.DEFAULTS = DEFAULTS;
diff --git a/client/d3/line/line.js b/client/d3/line/line.js
index 20db7b8..146241b 100644
--- a/client/d3/line/line.js
+++ b/client/d3/line/line.js
@@ -13,36 +13,36 @@ class LineChart extends Chart {
   }
 
   defineAxes(){
-    var line_chart = this;
+    var chart = this;
 
-    line_chart.y_scale = d3.scale.linear()
-      .range([line_chart.height, 0]);
-    line_chart.y_axis = d3.svg.axis()
-      .scale(line_chart.y_scale)
+    chart.y_scale = d3.scale.linear()
+      .range([chart.height, 0]);
+    chart.y_axis = d3.svg.axis()
+      .scale(chart.y_scale)
       .orient("left")
       .outerTickSize(1);
 
-    if (line_chart.time_series){
-      line_chart.x_scale = d3.time.scale()
-        .range([0, line_chart.width]);
+    if (chart.time_series){
+      chart.x_scale = d3.time.scale()
+        .range([0, chart.width]);
     } else {
-      line_chart.x_scale = d3.scale.linear()
-        .range([0, line_chart.width]);
+      chart.x_scale = d3.scale.linear()
+        .range([0, chart.width]);
     }
 
-    line_chart.x_axis = d3.svg.axis()
-      .scale(line_chart.x_scale)
+    chart.x_axis = d3.svg.axis()
+      .scale(chart.x_scale)
       .orient("bottom")
       .outerTickSize(0)
-    //line_chart.x_axis.tickFormat(d3.time.format('%b %d at %H'))
-    //line_chart.x_axis.ticks(d3.time.hour, 12);
+    //chart.x_axis.tickFormat(d3.time.format('%b %d at %H'))
+    //chart.x_axis.ticks(d3.time.hour, 12);
 
     // append axes
-    line_chart.svg.append("g")
+    chart.svg.append("g")
         .attr("class", "d3-chart-range d3-chart-axis");
-    line_chart.svg.append("g")
+    chart.svg.append("g")
         .attr("class", "d3-chart-domain d3-chart-axis")
-        .attr("transform", "translate(0, " + (line_chart.height) + ")");
+        .attr("transform", "translate(0, " + (chart.height) + ")");
   }
 
   afterAxes(){