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private void DateTimeAxis_ActualRangeChanged(object sender, ActualRangeChangedEventArgs e)
{
if (isPrimaryLoadTime)
{
if (Device.RuntimePlatform == Device.UWP)
{
initialPrimaryMinimum = Convert.ToDateTime(e.ActualMinimum).ToOADate();
initialPrimaryMaximum = Convert.ToDateTime(e.ActualMaximum).ToOADate();
}
else
{
initialPrimaryMinimum = (double)e.ActualMinimum;
initialPrimaryMaximum = (double)e.ActualMaximum;
}
isPrimaryLoadTime = false;
}
}
private void NumericalAxis_ActualRangeChanged(object sender, ActualRangeChangedEventArgs e)
{
if (isSecondaryLoadTime)
{
initialSecondaryMinimum = (double)e.ActualMinimum;
initialSecondaryMaximum = (double)e.ActualMaximum;
isSecondaryLoadTime = false;
}
}
private void Chart_ZoomDelta(object sender, Syncfusion.SfChart.XForms.ChartZoomDeltaEventArgs e)
{
//if you want to zoom beyond DateTimeAxis, you can add this code
if (e.Axis is DateTimeAxis)
{
if (e.PreviousZoomFactor == 1 && e.CurrentZoomFactor == 1)
{
double interval = 0;
if (dateTimeAxis.VisibleLabels.Count > 2)
{
var data = dateTimeAxis.VisibleLabels;
interval = data[1].Position - data[0].Position;
}
dateTimeAxis.Minimum = DateTime.FromOADate(dateTimeAxis.VisibleMinimum - interval); // subtract the value as you want to decrease the range during zoom out
dateTimeAxis.Maximum = DateTime.FromOADate(dateTimeAxis.VisibleMaximum + interval); // add the value as you want to increase the range during zoom out
}
}
//if you want to zoom beyond NumericalAxis, you can add this code
else if (e.Axis is NumericalAxis)
{
if (e.PreviousZoomFactor == 1 && e.CurrentZoomFactor == 1)
{
double interval = 0;
if (numericalAxis.VisibleLabels.Count > 2)
{
var data = numericalAxis.VisibleLabels;
interval = data[1].Position - data[0].Position;
}
numericalAxis.Minimum = numericalAxis.VisibleMinimum - interval;
numericalAxis.Maximum = numericalAxis.VisibleMaximum + interval;
}
}
}
private void Chart_ResetZoom(object sender, ChartResetZoomEventArgs e)
{
dateTimeAxis.Minimum = DateTime.FromOADate(initialPrimaryMinimum);
dateTimeAxis.Maximum = DateTime.FromOADate(initialPrimaryMaximum);
numericalAxis.Minimum = initialSecondaryMinimum;
numericalAxis.Maximum = initialSecondaryMaximum;
} | 
