Hi,

I am trying to set an X axis data cursor tool on my graph.

I am using this code, but it does not seems to be working, could you please tell me what I am missing?

//data cursor tool
NDataCursorTool m_DataCursorTool = new NDataCursorTool();

m_VerticalAxisCursor = new NAxisCursor();
m_VerticalAxisCursor.BeginEndAxis = (int)StandardAxis.PrimaryX;
m_VerticalAxisCursor.ValueChanged += new EventHandler(OnValueChanged);


m_VerticalAxisCursor.ValueSnapper = new NAxisMinorTickSnapper();
m_Chart.Axis(StandardAxis.PrimaryX).Cursors.Clear();
m_Chart.Axis(StandardAxis.PrimaryX).Cursors.Add(m_VerticalAxisCursor);


m_VerticalAxisCursor.SynchronizeOnMouseAction = MouseAction.None;
m_VerticalAxisCursor.SynchronizeOnMouseAction |= MouseAction.Move;

nChartControl1.Controller.Tools.Add(m_DataCursorTool);

My class which is handling the graph and the graph object in to separate classes, I do not know if thtat makes any difference or not because of the mouse move event.

Regards
Daniel

Hi Daniel,

Probably you don't have a selected chart - you can achieve this in two ways:

1. Add a NSelectorTool which will automatically select a chart when the user clicks on it.
2. Select a chart from code:

NChart chart = nChartControl1.Charts[0];
nChartControl1.Controller.Selection.SelectedObjects.Add(chart);

Hope this helps - let us know if you meet any problems.

Best Regards,
Nevron Support Team

Hi,

I changed my code regarding your answer to this:

NDataCursorTool m_DataCursorTool = new NDataCursorTool();

m_VerticalAxisCursor = new NAxisCursor();
m_VerticalAxisCursor.BeginEndAxis = (int)StandardAxis.PrimaryX;
m_VerticalAxisCursor.ValueChanged += new EventHandler(OnValueChanged);


m_VerticalAxisCursor.ValueSnapper = new NAxisMinorTickSnapper();
m_Chart.Axis(StandardAxis.PrimaryX).Cursors.Clear();
m_Chart.Axis(StandardAxis.PrimaryX).Cursors.Add(m_VerticalAxisCursor);


m_VerticalAxisCursor.SynchronizeOnMouseAction = MouseAction.None;
m_VerticalAxisCursor.SynchronizeOnMouseAction |= MouseAction.Move;

NChart chart = nChartControl1.Charts[0];
nChartControl1.Controller.Selection.SelectedObjects.Add(chart);
nChartControl1.Controller.Tools.Add(m_DataCursorTool);

Unfortunately it still does not show anything.

Regards
Daniel

Hi Daniel,

The begin end axis should the primary Y (or another vertical axis) as you add the cursor to the x axis:

verticalAxisCursor.BeginEndAxis = (int)StandardAxis.PrimaryY;

Also make sure that m_Chart and nChartControl1.Charts[0] actually refer to the same chart.

We tested with the following code:

      private void Form1_Load(object sender, EventArgs e)
      {
         NDataCursorTool dataCursorTool = new NDataCursorTool();

         NAxisCursor verticalAxisCursor = new NAxisCursor();
         verticalAxisCursor.BeginEndAxis = (int)StandardAxis.PrimaryY;

         verticalAxisCursor.ValueSnapper = new NAxisMinorTickSnapper();

         NChart chart = nChartControl1.Charts[0];
         chart.Axis(StandardAxis.PrimaryX).Cursors.Clear();
         chart.Axis(StandardAxis.PrimaryX).Cursors.Add(verticalAxisCursor);

         verticalAxisCursor.SynchronizeOnMouseAction = MouseAction.None;
         verticalAxisCursor.SynchronizeOnMouseAction |= MouseAction.Move;

         NBarSeries bar = new NBarSeries();
         bar.Values.Add(10);
         bar.Values.Add(20);
         bar.Values.Add(30);
         chart.Series.Add(bar);

         nChartControl1.Controller.Selection.SelectedObjects.Add(chart);
         nChartControl1.Controller.Tools.Add(dataCursorTool);
      }

and it was working OK.

Best Regards,
Nevron Support Team