+ // Make sure we don't overdraw.
+ Dygraph.clipCanvas_(this.hidden_, this.clippingArea_);
+ Dygraph.clipCanvas_(this.canvas_, this.clippingArea_);
+
+ var dygraph = this;
+ Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) {
+ dygraph.mouseMove_(e);
+ });
+ Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) {
+ dygraph.mouseOut_(e);
+ });
+
+ // Create the grapher
+ // TODO(danvk): why does the Layout need its own set of options?
+ this.layoutOptions_ = { 'xOriginIsZero': false };
+ Dygraph.update(this.layoutOptions_, this.attrs_);
+ Dygraph.update(this.layoutOptions_, this.user_attrs_);
+ Dygraph.update(this.layoutOptions_, {
+ 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) });
+
+ this.layout_ = new DygraphLayout(this, this.layoutOptions_);
+
+ // TODO(danvk): why does the Renderer need its own set of options?
+ this.renderOptions_ = { colorScheme: this.colors_,
+ strokeColor: null,
+ axisLineWidth: Dygraph.AXIS_LINE_WIDTH };
+ Dygraph.update(this.renderOptions_, this.attrs_);
+ Dygraph.update(this.renderOptions_, this.user_attrs_);
+ this.plotter_ = new DygraphCanvasRenderer(this,
+ this.hidden_, this.layout_,
+ this.renderOptions_);
+
+ this.createStatusMessage_();
+ this.createRollInterface_();
+ this.createDragInterface_();
+};
+
+/**
+ * Detach DOM elements in the dygraph and null out all data references.
+ * Calling this when you're done with a dygraph can dramatically reduce memory
+ * usage. See, e.g., the tests/perf.html example.
+ */
+Dygraph.prototype.destroy = function() {
+ var removeRecursive = function(node) {
+ while (node.hasChildNodes()) {
+ removeRecursive(node.firstChild);
+ node.removeChild(node.firstChild);
+ }
+ };
+ removeRecursive(this.maindiv_);
+
+ var nullOut = function(obj) {
+ for (var n in obj) {
+ if (typeof(obj[n]) === 'object') {
+ obj[n] = null;
+ }
+ }
+ };
+
+ // These may not all be necessary, but it can't hurt...
+ nullOut(this.layout_);
+ nullOut(this.plotter_);
+ nullOut(this);
+};