* fix bug #1170, http://pms.zentao.net/bug-view-1170.html.

src/js/chart.line.js

@@ -271,17 +271,18 @@
         addData: function(valuesArray, label) {
 			//Map the values array for each of the datasets
 
-            helpers.each(valuesArray, function(value, datasetIndex) {
+			helpers.each(valuesArray,function(value,datasetIndex){
 				//Add a new point for each piece of data, passing any required data to draw.
 				this.datasets[datasetIndex].points.push(new this.PointClass({
-                    value: value,
-                    label: label,
-                    x: this.scale.calculateX(this.scale.valuesCount + 1),
+					value : value,
+					label : label,
+					datasetLabel: this.datasets[datasetIndex].label,
+					x: this.scale.calculateX(this.scale.valuesCount+1),
 					y: this.scale.endPoint,
-                    strokeColor: this.datasets[datasetIndex].pointStrokeColor,
-                    fillColor: this.datasets[datasetIndex].pointColor
+					strokeColor : this.datasets[datasetIndex].pointStrokeColor,
+					fillColor : this.datasets[datasetIndex].pointColor
 				}));
-            }, this);
+			},this);
 
 			this.scale.addXLabel(label);
 			//Then re-render the chart.