How to get series data on drag event in kendo UI

Question

In Kendo UI whenever we use drag event we can get screen x and y positions but how to get the series/datasource information in Kendo UI chart(line chart).

In the below code, I am highlighting some information in line char(time series) using drag event and then printing the data.

 function createChart(data) {

            $("#TimeSeriesPlot").kendoChart({

                title: {
                    text: series_name.toUpperCase()
                },
                dataSource :{
                    data:data.timeseries,
                },
                series: [{
                    type: "line",
                     field:"v",
                    categoryField:"ts",
               }],
                 valueAxis: {
                    labels: {
                        format: "{0}"
                    },title:{
                        text: "value"
                    },
                    line: {
                        visible: false
                    },

                 },
                categoryAxis: {
                 labels: {
                  type: "date",

                },  
               tooltip: {
                    visible: true,
                   // shared:true,
                     template: "${category} - ${value}"
                },

                /***events start from here***/

                plotAreaClick: onPlotAreaClick,
                seriesClick:onSeriesClick ,
                dragStart:onDragStart ,
                drag:onDrag,
                dragEnd:onDragEnd 

            });
        }
}

function onSeriesHover(e) {
        console.log(kendo.format("Series hover :: {0} ({1}): {2}",
            e.series.name, e.category, e.value));
        }


function onSeriesClick(e){
       //   console.log(selected_anamolies);
         //  console.log(e.category);
           selected_anamolies.push("ts",e.category);
           selected_anamolies.push("v",e.value);
}

function onDragStart(e){

       //  console.log("dragstart"+e.axisRanges.ts);

        //   console.log("dragstart"+e.sender._highlight._points[0].value);
       //     console.log("dragstart"+e.sender._highlight._points[0].category);


}

function onDrag(e){

        var Rect = kendo.geometry.Rect;
        var draw = kendo.drawing;
        prevloc=e.originalEvent.x.startLocation;
        currentloc=e.originalEvent.x.location;

        var rect=new Rect([prevloc,50],[currentloc-prevloc,150]);
        var path = draw.Path.fromRect(rect,{  stroke: null,fill:{color:"#d3f1fb",opacity:0.2}});
        var chart = e.sender;
//   var surface = draw.Surface.create($("#surface"));
        chart.surface.draw(path);
                    //                        
}


function onDragEnd(e){
  console.log(dragEnd)

}

Answer 1

For that you will need to find the most parallel chart point from the mouse location. and then, suppose selectednodeis the point which is most parallel to your mouse current location. Now you can find the data of that point in Dataitem variable Dataitem = selectednode._kendoNode.srcElement.chartElement.pointData.dataItem;

I have solved it for me like..

$("#yourchartdivid").on('mousemove', function (el, ui) {
  var child = $(document).find('circle');
  var childrens = [];
child.filter(function (e, data) {
   if (data.attributes.stroke.value == trendcolor[es].color) {
   childrens.push(data);
   }
});
  getfrombottom(el.clientY, el, childrens, el, trendcolor[es].trendname, controlkey);});

Now define new function getfrombottom()

function getfrombottom(bottom, event, childrens, i, trendname, controlkey) {
for (var o = bottom; o > 0; o--) {
    for (var k = 0; k < childrens.length ; k++) {
        var originalmousepossition = event.pageY;
        var originalmouseposition = event.pageX - 9;
        var circlestopposition = childrens[k].parentNode.getBoundingClientRect().top;
        var circleleftposition = childrens[k].cx.baseVal.value;
        if (originalmouseposition - circleleftposition < 3) {            

---

var selectednode = childrens[k];

---

        Dataitem = selectednode._kendoNode.srcElement.chartElement.pointData.dataItem;
        return false;
        }
    }
}}

Let me know if it does not work for you.