CODEWITHSUNDEEP
wpfscichart
paul.frivold
paul.frivold

Reputation: 49

Trouble with ZoomStates: 'ISciChartSurface' does not contain a definition for 'ZoomStates'

I've been looking through the new (and really great!) SciChart Tutorial, and I've run into an issue. I'm trying to use the ViewportManager API to make a realtime-updating chart zoomable and scrollable. However this bit of code is not working:

// Don't Scroll if user is Zooming
if (ParentSurface.ZoomState == ZoomStates.UserZooming) {
    return currentVisibleRange;
}

I'm getting errors, for both ZoomState and ZoomStates, letting me know that ISciChartSurface does not contain a definition for ZoomState. As far as I can tell ZoomStates should be an enum in SciChart.Charting.Visuals, however I can't find it in the Assembly Explorer. Is it somehow missing from my installation of SciChart? Or have I - as per usual - made some really stupid mistake? What can I do about this? Thanks!

Info: SciChart version 4.1.1.8645

Full class code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using SciChart.Charting.ViewportManagers;
using SciChart.Charting.Visuals;
using SciChart.Charting.Visuals.Axes;
using SciChart.Data.Model;



namespace SciCharter {
    /// <summary>
    /// Applies a scrolling window to the chart unless the user is zooming or panning
    /// </summary>
    public class ScrollingViewportManager : DefaultViewportManager {
        private readonly double _windowSize;
        public ISciChartSurface ParentSurface { get; set; }

        public ScrollingViewportManager(double windowSize) {
            _windowSize = windowSize;
        }

        public override void AttachSciChartSurface(ISciChartSurface scs) {
            base.AttachSciChartSurface(scs);
            this.ParentSurface = scs;
        }

        protected override IRange OnCalculateNewXRange(IAxis xAxis) {
            // The Current XAxis Visible Range
            var currentVisibleRange = xAxis.VisibleRange.AsDoubleRange();

            // Don't Scroll if user is Zooming
            if (ParentSurface.ZoomState == ZoomStates.UserZooming) {
                return currentVisibleRange;
            }

            var maxXRange = xAxis.GetMaximumRange().AsDoubleRange();
            double xMax = Math.Max(maxXRange.Max, currentVisibleRange.Max);

            // Scroll showing latest window range
            return new DoubleRange(xMax - _windowSize, xMax);

        }
    }
}

Upvotes: 1

Views: 129

Answers (1)

Dr. Andrew Burnett-Thompson
Dr. Andrew Burnett-Thompson

Reputation: 21521

In the article SciChart WPF: New set of tutorials now online it says:

Tutorials Include ... WPF Chart Tutorial 06 – Adding Realtime Updates (15 minutes) uses some features from SciChart v4.2, which is in QA now and available on the nightly build feed only.

The SciChart WPF Nightly Builds are available from a private nuget feed. Full instructions on how to access them can be found here.

Hope this helps!

Upvotes: 1

Related Questions