* add 'showTooltips' option to dataset.

src/js/Chart.Core.js

@@ -1174,6 +1174,9 @@
                                 yMin;
                             helpers.each(this.datasets, function(dataset)
                             {
+/// ZUI change begin
+                                if(dataset.showTooltips === false) return;
+/// ZUI change end
                                 dataCollection = dataset.points || dataset.bars || dataset.segments;
                                 if (dataCollection[dataIndex] && dataCollection[dataIndex].hasValue())
                                 {

src/js/chart.line.js

@@ -133,6 +133,9 @@
                     strokeColor: dataset.strokeColor,
                     pointColor: dataset.pointColor,
                     pointStrokeColor: dataset.pointStrokeColor,
+/// ZUI change begin
+                    showTooltips: dataset.showTooltips !== false,
+/// ZUI change end
                     points: []
                 };