X-Git-Url: https://adrianiainlam.tk/git/?a=blobdiff_plain;f=dygraph.js;h=bd3a4cc3261f8fb13051dfa035f81aa3caf57c08;hb=c06d8ec4ed15aeaf6bc2be27542972d73b9c0680;hp=06abf972be0dbcfed2464b085bf5ee5e0b3fa2dc;hpb=1cc3540b8c9712df59ec46275e3bfc557a4e5fca;p=dygraphs.git

diff --git a/dygraph.js b/dygraph.js
index 06abf97..bd3a4cc 100644
--- a/dygraph.js
+++ b/dygraph.js
@@ -233,6 +233,7 @@ Dygraph.DEFAULT_ATTRS = {
 
   stepPlot: false,
   avoidMinZero: false,
+  drawAxesAtZero: false,
 
   // Sizes of the various chart labels.
   titleHeight: 28,
@@ -1062,8 +1063,10 @@ Dygraph.prototype.createMouseEventElement_ = function() {
  * @private
  */
 Dygraph.prototype.setColors_ = function() {
-  var num = this.attr_("labels").length - 1;
+  var labels = this.getLabels();
+  var num = labels.length - 1;
   this.colors_ = [];
+  this.colorsMap_ = {};
   var colors = this.attr_('colors');
   var i;
   if (!colors) {
@@ -1075,17 +1078,18 @@ Dygraph.prototype.setColors_ = function() {
       // alternate colors for high contrast.
       var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2);
       var hue = (1.0 * idx/ (1 + num));
-      this.colors_.push(Dygraph.hsvToRGB(hue, sat, val));
+      var colorStr = Dygraph.hsvToRGB(hue, sat, val);
+      this.colors_.push(colorStr);
+      this.colorsMap_[labels[i]] = colorStr;
     }
   } else {
     for (i = 0; i < num; i++) {
       if (!this.visibility()[i]) continue;
       var colorStr = colors[i % colors.length];
       this.colors_.push(colorStr);
+      this.colorsMap_[labels[1 + i]] = colorStr;
     }
   }
-
-  this.plotter_.setColors(this.colors_);
 };
 
 /**
@@ -1122,7 +1126,7 @@ Dygraph.prototype.getPropertiesForSeries = function(series_name) {
     name: series_name,
     column: idx,
     visible: this.visibility()[idx - 1],
-    color: this.plotter_.colors[series_name],
+    color: this.colorsMap_[series_name],
     axis: 1 + this.seriesToAxisMap_[series_name]
   };
 };
@@ -2101,7 +2105,10 @@ Dygraph.prototype.predraw_ = function() {
   this.computeYAxes_();
 
   // Create a new plotter.
-  if (this.plotter_) this.plotter_.clear();
+  if (this.plotter_) {
+    this.cascadeEvents_('clearChart');
+    this.plotter_.clear();
+  }
   this.plotter_ = new DygraphCanvasRenderer(this,
                                             this.hidden_,
                                             this.hidden_ctx_,
@@ -2329,8 +2336,26 @@ Dygraph.prototype.drawGraph_ = function() {
  * @private
  */
 Dygraph.prototype.renderGraph_ = function(is_initial_draw) {
+  this.cascadeEvents_('clearChart');
   this.plotter_.clear();
+
+  if (this.attr_('underlayCallback')) {
+    // NOTE: we pass the dygraph object to this callback twice to avoid breaking
+    // users who expect a deprecated form of this callback.
+    this.attr_('underlayCallback')(
+        this.hidden_ctx_, this.layout_.getPlotArea(), this, this);
+  }
+
+  var e = {
+    canvas: this.hidden_,
+    drawingContext: this.hidden_ctx_,
+  };
+  this.cascadeEvents_('willDrawChart', e);
   this.plotter_.render();
+  this.cascadeEvents_('didDrawChart', e);
+
+  // TODO(danvk): is this a performance bottleneck when panning?
+  // The interaction canvas should already be empty in that situation.
   this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width,
                                           this.canvas_.height);
 
@@ -2339,8 +2364,6 @@ Dygraph.prototype.renderGraph_ = function(is_initial_draw) {
   if (this.rangeSelector_) {
     this.rangeSelector_.renderInteractiveLayer();
   }
-
-  this.cascadeEvents_('drawChart');
   if (this.attr_("drawCallback") !== null) {
     this.attr_("drawCallback")(this, is_initial_draw);
   }
@@ -3487,6 +3510,7 @@ Dygraph.prototype.datasetIndexFromSetName_ = function(name) {
  * called once -- all calls after the first will return immediately.
  */
 Dygraph.addAnnotationRule = function() {
+  // TODO(danvk): move this function into plugins/annotations.js?
   if (Dygraph.addedAnnotationCSS) return;
 
   var rule = "border: 1px solid black; " +