Hi,

I'm adding a NDataZoomTool and a NSelectorTool and a NDataPanTool() to a NCartesianChart followed by adding a RangeSelections

m_Chart.RangeSelections.Add(new NRangeSelection());

I would like to perform a Zoom of a muliYaxis plot, see Image 1. However, when I try to Zoom in a on part of the graph only the left Y-axis is scaled according the zoom - the right Y-axis is not scaled (is ot affected by the zoom) - see attached Image 2 and Image 3.

Hello Hans,

 I have had a similar problem - and couldnt find sort of build in function to do so. Hence I implemented it manually:

Implement the following within the OnDataZoom_EndDrag - Event:
         NRange1DD contentRange = oChart.Axis(StandardAxis.PrimaryX).ViewRange;
          NRange1DD viewRange = oChart.Axis(StandardAxis.PrimaryX).Scale.RulerRange;
          double beginFactor = contentRange.GetValueFactor(viewRange.Begin);
          double endFactor = contentRange.GetValueFactor(viewRange.End);

          bool bolXZoomActive = (beginFactor == 0.0 && endFactor == 1.0) ? false : true;

          // compute factors Y Zoom
          contentRange = oChart.Axis(StandardAxis.PrimaryY).ViewRange;
          viewRange = oChart.Axis(StandardAxis.PrimaryY).Scale.RulerRange;
          beginFactor = contentRange.GetValueFactor(viewRange.Begin);
          endFactor = contentRange.GetValueFactor(viewRange.End);

          bool bolYZoomActive = (beginFactor == 0.0 && endFactor == 1.0) ? false : true;


          if (_PlotData.MultipleYAxis && true) {    //NewFeature: MultipleYAxis 2014_09           
           // then for all other y axes make sure their view range factor equals to begin/end factor
           if (bolYZoomActive) {
            // disable Scrollbar for all Y-Axis except primary YAxis
            foreach (NAxis axis in oChart.Axes) {
              if (axis.AxisId != (int)StandardAxis.PrimaryY && axis.AxisOrientation == AxisOrientation.Vertical) {
               axis.PagingView.Enabled = true;

               // compute the new range based on factor
               NRange1DD axisContentRange = axis.ViewRange;
               double rangeLength = axisContentRange.End - axisContentRange.Begin;

               double begin = axisContentRange.Begin + beginFactor * rangeLength;
               double end = axisContentRange.Begin + endFactor * rangeLength;

               axis.PagingView.ZoomIn(new NRange1DD(begin, end), 0.0001);
              }
            }

           }
           else {
            // full view no zoom
            foreach (NAxis axis in oChart.Axes) {
              if (axis.AxisId != (int)StandardAxis.PrimaryY && axis.AxisOrientation == AxisOrientation.Vertical) {
               axis.PagingView.Enabled = false;
              }
            }
           }

          }

          bool bolRecalcLayout = _PlotData.MultipleYAxis;

Maybe afterwards you have to do the following as well:
_NevronChart.document.Calculate();   //ruler values must be calculated first
_NevronChart.document.RecalcLayout(_NevronChart.View.Context);
_NevronChart.Refresh();

Best regards,
Joern

Hi All,
You can also check out the following example - All Examples \ Interactivity \ Tools \ Multiple Axes Zooming and Scrolling - it shows how to simultaneously zoom in / out two vertical axes.

Best Regards,
Nevron Support Team

Hi Joern,

Most likely you have the NDataZoomTool added before the NAxisScrollTool in the tools collection.

Best Regards,
Nevron Support Team