Profile Picture

NHitTestResult DataPointIndex always 0

Posted By Daniel Csimszi 9 Years Ago
Author
Message
Daniel Csimszi
Question Posted 9 Years Ago
View Quick Profile
Forum Guru

Forum Guru (50 reputation)Forum Guru (50 reputation)Forum Guru (50 reputation)Forum Guru (50 reputation)Forum Guru (50 reputation)Forum Guru (50 reputation)Forum Guru (50 reputation)Forum Guru (50 reputation)Forum Guru (50 reputation)

Group: Forum Members
Last Active: 8 Years Ago
Posts: 61, Visits: 35
Hello,

I would like to get the X value of a point at user mouse click. I thought it will be easy as in theory I should be just using the NHitTestResult at the mouse click event. Unfortunately my DataPointIndex is always 0, the parent node perfectly found but nothing else.

I am not sure if it is to do with my chart setup of with something else so I thought the best would be to post my code:
I have a class which needs an NChartControl to set up the relevant chart:

public HistoryGraphControl(Nevron.Chart.WinForm.NChartControl nChartControl1)
   {
       NDataZoomTool m_DataZoomTool = new NDataZoomTool();
       this.nChartControl1 = nChartControl1;
       nChartControl1.MouseDown += new MouseEventHandler(nChartControl1_MouseClick);
       
   #region chart set up

    // configure the chart
    m_Chart = (NCartesianChart)nChartControl1.Charts[0];

    NStandardFrameStyle frameStyle = (NStandardFrameStyle)nChartControl1.BackgroundStyle.FrameStyle;
    frameStyle.Visible = false;
    m_Chart.Location = new NPointL(new NLength(0, NRelativeUnit.ParentPercentage), new NLength(10, NRelativeUnit.ParentPercentage));
    m_Chart.Size = new NSizeL(new NLength(99, NRelativeUnit.ParentPercentage), new NLength(84, NRelativeUnit.ParentPercentage));


    NCartesianChart chart = (NCartesianChart)nChartControl1.Charts[0];
    chart.Projection.SetPredefinedProjection(PredefinedProjection.Orthogonal);
    chart.BoundsMode = BoundsMode.Stretch;

    NRangeSelection rangeSelection = new NRangeSelection();
    rangeSelection.ZoomOutResetsAxis = true;
    chart.RangeSelections.Add(rangeSelection);
    chart.Axis(StandardAxis.PrimaryX).ScrollBar.Visible = true;
    chart.Axis(StandardAxis.PrimaryY).ScrollBar.Visible = true;

    rightAxes = m_Chart.Axis(StandardAxis.SecondaryY);
    rightAxes.Anchor = new NDockAxisAnchor(AxisDockZone.FrontRight, true);
    rightAxes.Visible = true;
    ((NStandardScaleConfigurator)rightAxes.ScaleConfigurator).LabelStyle.TextStyle = new NTextStyle(new Font("Verdana", 12), Color.Black);

    //set up axis X
    NAxis axiss = m_Chart.Axis(StandardAxis.PrimaryX);
    NDateTimeScaleConfigurator dateTimeScale = new NDateTimeScaleConfigurator();
    dateTimeScale.MajorGridStyle.LineStyle.Pattern = LinePattern.Dot;
    dateTimeScale.MajorGridStyle.SetShowAtWall(ChartWallType.Back, true);
    dateTimeScale.MajorGridStyle.SetShowAtWall(ChartWallType.Floor, false);
    dateTimeScale.MaxTickCount = 10;
    dateTimeScale.CustomStep = new NDateTimeSpan(1, NDateTimeUnit.Hour);
    dateTimeScale.MajorTickMode = MajorTickMode.AutoMaxCount;
    dateTimeScale.AutoDateTimeUnits = new NDateTimeUnit[] { NDateTimeUnit.Hour };
    dateTimeScale.RoundToTickMin = false;
    dateTimeScale.RoundToTickMax = false;
    dateTimeScale.EnableUnitSensitiveFormatting = false;
    dateTimeScale.LabelValueFormatter = new NDateTimeValueFormatter("dd-MMM-yy \r\n HH:mm");
    axiss.ScaleConfigurator = dateTimeScale;
    

    nChartControl1.Settings.AnimationInterval = 50;
    m_DataZoomTool.AnimateZooming = true;
    m_DataZoomTool.AnimationSteps = 10;

    m_Legend = new NLegend();
    m_Legend.Mode = LegendMode.Manual;
    m_Legend.Margins = new NMarginsL(10, 10, 10, 3);


    m_Chart.DisplayOnLegend = m_Legend;
    m_Legend.Visible = true;
    m_Legend.Dock = DockStyle.Bottom;
    
    m_Legend.FitAlignment = ContentAlignment.MiddleCenter;
    m_Legend.BoundsMode = BoundsMode.Fit;

    m_Legend.Data.ExpandMode = (LegendExpandMode)1;
    Array values = Enum.GetValues(typeof(ContentAlignment));
    m_Legend.FitAlignment = (ContentAlignment)values.GetValue(7);


    nChartControl1.Panels.Add(m_Legend);

    nChartControl1.Controller.Selection.Add(chart);
    nChartControl1.Controller.Tools.Add(new NAxisScrollTool());
    nChartControl1.Controller.Tools.Add(m_DataZoomTool);

    NStandardScaleConfigurator scaleConfiguratorX = (NStandardScaleConfigurator)m_Chart.Axis(StandardAxis.PrimaryX).ScaleConfigurator;
    scaleConfiguratorX.Title.Text = "Date/Time";
    scaleConfiguratorX.LabelStyle.TextStyle = new NTextStyle(new Font("Verdana", 12), Color.Black);
    scaleConfiguratorX.Title.TextStyle.FontStyle = new NFontStyle("Verdana", 12, FontStyle.Regular);

    NStandardScaleConfigurator scaleConfiguratorY = (NStandardScaleConfigurator)m_Chart.Axis(StandardAxis.PrimaryY).ScaleConfigurator;
    scaleConfiguratorY.Title.Text = "Scale 1";
    scaleConfiguratorY.LabelStyle.TextStyle = new NTextStyle(new Font("Verdana", 12), Color.Black);
    scaleConfiguratorY.Title.TextStyle.FontStyle = new NFontStyle("Verdana", 12, FontStyle.Regular);

    NStandardScaleConfigurator scaleConfiguratorY2 = (NStandardScaleConfigurator)m_Chart.Axis(StandardAxis.SecondaryY).ScaleConfigurator;
    scaleConfiguratorY2.Title.Text = "Scale 2";
    scaleConfiguratorY2.LabelStyle.TextStyle = new NTextStyle(new Font("Verdana", 12), Color.Black);
    scaleConfiguratorY2.Title.TextStyle.FontStyle = new NFontStyle("Verdana", 12, FontStyle.Regular);

    #endregion

  }

  void nChartControl1_MouseClick(object sender, MouseEventArgs e)
   {
    NHitTestResult hitTestResult = nChartControl1.HitTest(e.X, e.Y);
    Console.WriteLine("Data point [" + hitTestResult.DataPointIndex.ToString() + "] from series [" + ((NSeriesBase)hitTestResult.Object.ParentNode).Name + "]");

   }

  //add values to the graph
   public void addValues(List<Tuple<DateTime, double>> values, string lineName, Color graphColor, bool leftAxis, double hourOffset, string graphType)
   {
    colors.Add(graphColor);
    switch (graphType)
    {
      case "X":
       addXLine(lineName, leftAxis, graphColor);
       break;
      default:
       addNormalLine(lineName, leftAxis, graphColor);
       break;
    }

    

    for (int i = 0; i < values.Count; i++)
    {
      NLineSeries line = (NLineSeries)lineList[lineList.Count - 1];
      line.XValues.Add((values[i].Item1.AddHours(hourOffset)).ToOADate());
      line.Values.Add(values[i].Item2);
      line.BorderStyle.Color = graphColor;
    }

    nChartControl1.Refresh();
   }

public void addXLine(string name, bool leftAxis, Color color)
   {
    if (name == null || name.Length < 0)
      name = "Excel data";
    // add a line series
    NLineSeries m_Line = new NLineSeries();
    m_Line = (NLineSeries)m_Chart.Series.Add(SeriesType.Line);
    m_Line.Name = name;
    m_Line.InflateMargins = true;
    m_Line.DataLabelStyle.Visible = false;
    m_Line.MarkerStyle.Visible = true;
    m_Line.MarkerStyle.PointShape = PointShape.Cylinder;
    m_Line.MarkerStyle.Width = new NLength(1.5f, NRelativeUnit.ParentPercentage);
    m_Line.MarkerStyle.Height = new NLength(1.5f, NRelativeUnit.ParentPercentage);
    m_Line.SamplingMode = SeriesSamplingMode.Enabled;

    m_Line.DataLabelStyle.VertAlign = VertAlign.Center;
    m_Line.DataLabelStyle.Format = "<value>";
    m_Line.DataLabelStyle.TextStyle.FillStyle = new NColorFillStyle(Color.White);
    m_Line.DataLabelStyle.TextStyle.FontStyle.EmSize = new NLength(1.4f, NRelativeUnit.RootPercentage);
    m_Line.DataLabelStyle.TextStyle.BackplaneStyle.Visible = false;


    m_Line.Legend.Mode = SeriesLegendMode.Series;
    m_Line.UseXValues = true;
    m_Line.BorderStyle.Color = color;

    if (leftAxis)
    {
      m_Line.DisplayOnAxis(StandardAxis.PrimaryY, true);
      m_Line.DisplayOnAxis(StandardAxis.SecondaryY, false);
    }
    else
    {
      m_Line.DisplayOnAxis(StandardAxis.PrimaryY, false);
      m_Line.DisplayOnAxis(StandardAxis.SecondaryY, true);
    }

    addLegend(name, color);
    lineList.Add(m_Line);
    colors.Add(color);
   }


When I click on any of the data points I get the following output:
Data point [0] from series ["line name"]

It would be appreciated if you could let me know the reason why I do not get the right data point index.

Regards,
Daniel

Nevron Support
Posted 9 Years Ago
View Quick Profile
Supreme Being

Supreme Being (4,435 reputation)Supreme Being (4,435 reputation)Supreme Being (4,435 reputation)Supreme Being (4,435 reputation)Supreme Being (4,435 reputation)Supreme Being (4,435 reputation)Supreme Being (4,435 reputation)Supreme Being (4,435 reputation)Supreme Being (4,435 reputation)

Group: Forum Members
Last Active: Last Week
Posts: 3,054, Visits: 4,009
Hi Daniel,

The problem is that you enable line sampling:
ENPieLabelModem_Line.SamplingMode = SeriesSamplingMode.Enabled;
in which case the line series does not record per data point interactivity information for performance reasons.


Best Regards,
Nevron Support Team



Daniel Csimszi
Posted 9 Years Ago
View Quick Profile
Forum Guru

Forum Guru (50 reputation)Forum Guru (50 reputation)Forum Guru (50 reputation)Forum Guru (50 reputation)Forum Guru (50 reputation)Forum Guru (50 reputation)Forum Guru (50 reputation)Forum Guru (50 reputation)Forum Guru (50 reputation)

Group: Forum Members
Last Active: 8 Years Ago
Posts: 61, Visits: 35
Thank you, it did fix my problem.



Similar Topics


Reading This Topic