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Thanks for your reply.
I already have that part working - Mouse Zoom on the X axis and panning the same axis with click and drag.
But as shown in the image below, i need the Y axis to autozoom, so that Y values resize to fit the chart.
I guess you indicated where to do that, with the // Perform Action in the chart_ZoomChanged method, but not how. ;)
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private void chart_ZoomChanged(object sender, ZoomChangedEventArgs e)
{
if ( e.NewRange != null && e.CurrentFactor != 1)
{
var range = (DoubleRange)(e.NewRange);
var x1 = range.Start;
var x2 = range.End;
var y1 = (double)secondaryAxis.VisibleRange.Start;
var y2 = (double)secondaryAxis.VisibleRange.End;
var collection = (chart.Series[0] as CandleSeries).GetDataPoints(x1, x2, y1, y2);
UpdateAxisRange(collection);
}
}
private void chart_SelectionZoomingEnd(object sender, SelectionZoomingEndEventArgs e)
{
var collection = (chart.Series[0] as CandleSeries).GetDataPoints(e.ZoomRect);
UpdateAxisRange(collection);
}
private void UpdateAxisRange(List<object> collection)
{
List<Model> data = new List<Model>();
foreach (var datapoint in collection)
{
data.Add(datapoint as Model);
}
secondaryAxis.Minimum = data.Min(a => a.Low);
secondaryAxis.Maximum = data.Max(a => a.High);
} |
