CanvasJS – Get Current Time Range

• May 4, 2017 at 2:30 pm #14998
  
  patricia.krupa

  Hallo,

  i need to write a chart that deals with a large number of datapoints collected on a device, more then a million after after a year. For that i am writing a dynamic fetching mechanismus that gets more detailed data after zooming. Is there a way to get the current start and end date of a rendered chart ? (The Values on X-Axis are Dates)

  I found the “intervalStartPosition”, which would be close to the “enddate”, far right axis point, however i dont see a value with contains the other end.

  Is there a way to access those informations ?

  Thank you very much

  May 4, 2017 at 5:02 pm #15000
  
  Suyash Singh

  @patricia-krupa,

  Please have a look at viewPortMinimum, viewPortMaximum, minimum, maximum.

  Also you can go through rangeChanged and rangeChanging events which are triggered after/before viewportMinimum or viewPortMaximum are updated while zooming, panning, or reset.
  ___
  Suyash Singh
  Team CanvasJS

  May 4, 2017 at 5:51 pm #15003
  
  patricia.krupa

  However, those values are some Integers, how can i get the Date values ? Can i set somewhere the type to Date ?

  My options object looks like this:
  {
  zoomEnabled: true,
  title: {
  text: “Temperature History”
  },
  rangeChanged: null,
  data: [
  {
  type: “line”,
  showInLegend: true,
  name: “Temperature”,
  legendText: “Temperature”,
  lineThickness: 1,
  markerType: “circle”,
  //markerSize: 3,
  legendMarkerType: “circle”,
  dataPoints: [ ]
  },
  {
  type: “line”,
  legendText: “Temperature Set”,
  name: “TemperatureSet”,
  showInLegend: true,
  lineThickness: 1,
  markerType: “triangle”,
  //markerSize: 3,
  legendMarkerType: “triangle”,
  dataPoints: []
  }
  ]
  }

  May 4, 2017 at 7:51 pm #15007
  
  Suyash Singh

  @patricia-krupa,

  You can pass x-values as either timestamp or in valid date format to use date-time over axisX. Also to set the type of the axisX interval you can use intervalType.

  If this doesn’t solve your requirement, can you kindly create a jsfiddle so that we can look into it and help you out better.

  ___
  Suyash Singh
  Team CanvasJS

  May 4, 2017 at 8:05 pm #15008
  
  patricia.krupa

  Setting intervalType to minute solved it! Thank you!