Add per-series 'color' option.

[dygraphs.git] / dygraph.js

diff --git a/dygraph.js b/dygraph.js
index effe10d..4e15985 100644 (file)
--- a/dygraph.js
+++ b/dygraph.js
@@ -1161,14 +1161,41 @@ Dygraph.prototype.setColors_ = function() {
   var num = labels.length - 1;
   this.colors_ = [];
   this.colorsMap_ = {};
+
+  // These are used for when no custom colors are specified.
+  var sat = this.attr_('colorSaturation') || 1.0;
+  var val = this.attr_('colorValue') || 0.5;
+  var half = Math.ceil(num / 2);
+
   var colors = this.attr_('colors');
-  var i;
+  var visibility = this.visibility();
+  for (var i = 0; i < num; i++) {
+    if (!visibility[i]) {
+      continue;
+    }
+    var label = labels[i + 1];
+    var colorStr = this.attributes_.getForSeries('color', label);
+    if (!colorStr) {
+      if (colors) {
+        colorStr = colors[i % colors.length];
+      } else {
+        // alternate colors for high contrast.
+        var idx = i % 2 ? (half + (i + 1)/ 2) : Math.ceil((i + 1) / 2);
+        var hue = (1.0 * idx / (1 + num));
+        colorStr = Dygraph.hsvToRGB(hue, sat, val);
+      }
+    }
+    this.colors_.push(colorStr);
+    this.colorsMap_[label] = colorStr;
+  }
+/*
   if (!colors) {
     var sat = this.attr_('colorSaturation') || 1.0;
     var val = this.attr_('colorValue') || 0.5;
     var half = Math.ceil(num / 2);
     for (i = 1; i <= num; i++) {
       if (!this.visibility()[i-1]) continue;
+      var customColor = this.attributes_.getForSeries('color', labels[i]);
       // alternate colors for high contrast.
       var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2);
       var hue = (1.0 * idx/ (1 + num));
@@ -1184,6 +1211,8 @@ Dygraph.prototype.setColors_ = function() {
       this.colorsMap_[labels[1 + i]] = colorStr;
     }
   }
+*/
+
 };
 
 /**