Trackball display for time and numeric axis simultaneously.

Question

Hi Experts

I am creating a graph on the main X axis is a timeline, and on the second X axis is numbers for an easier way to get the point number on the graph (this numerical axis is the main graph, the time line is only needed to display to the user), so I have a problem when the numerical axis was not and was only temporal I created Trackball and showed X and Y coordinates of point on the entire graph, now that I added a new numerical axis and made it main Trackball shows only the first point coordinates.

chartControl1.Trackball.Visible = true;
chartControl1.Trackball.DisplayMode = TrackballTooltipDisplayMode.Float;

How can this be fixed?

Yuvaraj Palanisamy · Answer

Hi Dmitriy Shilin,  
  
You can customize the trackball text with the help of TrackballTooltipRendering event of chart Trackball as per the below code example.   
  
CodeSnippet:  




  
chartControl1.Trackball.TrackballTooltipRendering += Trackball_TrackballTooltipRendering;  
  
private void Trackball_TrackballTooltipRendering(object sender, TrackballTooltipEventArgs args)  
{  
    args.Text = Math.Round(chartControl1.Series[args.SeriesIndex].Points[args.pointIndex].X, 2).ToString();  
}  
  
 
Also, please find the sample from the below link and let us know if you have any further assistance.  
 
Sample: https://www.syncfusion.com/downloads/support/forum/173229/ze/Trackball368790859  
  
Output:  
  
  
 
Thanks, 
Yuvaraj.

Dmitriy Shilin · Answer

Hi, thanks for your reply, the problem is solved but not exactly the way I wanted, I wanted the X axis to have numbers corresponding to the point index on the graph to find the point index on the graph more easily and quickly as I do point movement with the mouse, my problem is that Trackball does not follow the mouse pointer if the axis values have different types, I create the axes this way:

ChartAxis newXaxis = new ChartAxis();
newXaxis.GridLineType.ForeColor = Color.LightGray;
newXaxis.LineType.ForeColor = Color.LightGray;
newXaxis.ValueType = ChartValueType.DateTime;
newXaxis.RangeType = ChartAxisRangeType.Set;

newXaxis.DateTimeFormat = "HH:mm";
int addminX = AllData.measure[0].TimeStart.Minute % 15;
int addmaxX = (60 - AllData.measure[0].TimeEnd.Minute) % 15;
DateTime minX = AllData.measure[0].TimeStart.AddMinutes(-addminX).AddSeconds(-AllData.measure[0].TimeStart.Second);
DateTime maxX = AllData.measure[0].TimeEnd.AddMinutes(addmaxX).AddSeconds(-AllData.measure[0].TimeEnd.Second);

newXaxis.DateTimeRange = new ChartDateTimeRange(minX, maxX, 15, ChartDateTimeIntervalType.Minutes);
chartControl1.Axes.Add(newXaxis);

ChartAxis mainXaxis = new ChartAxis();
mainXaxis.OpposedPosition = true;
mainXaxis.GridLineType.ForeColor = Color.LightGray;
mainXaxis.LineType.ForeColor = Color.LightGray;
mainXaxis.ValueType = ChartValueType.Double;
mainXaxis.RangeType = ChartAxisRangeType.Set;

int minpoint = ((AllData.measure[0].TimeStart.Hour * 60 * 60 + AllData.measure[0].TimeStart.Minute * 60 + AllData.measure[0].TimeStart.Second) - (minX.Hour * 60 * 60 + minX.Minute * 60 + minX.Second)) / interval;
int maxpoint = (((maxX.Hour * 60 * 60 + maxX.Minute * 60 + maxX.Second) - (minX.Hour * 60 * 60 + minX.Minute * 60 + minX.Second)) / interval) - minpoint;
int separator = 15 * 60 / interval;
mainXaxis.Range = new MinMaxInfo(-minpoint, maxpoint, separator);
chartControl1.Axes.Add(mainXaxis);
//newXaxispoint.IsVisible = false;

.....
series.XAxis = mainXaxis;

for (int j = 0; j < AllData.measure[i].DataGraph.Count; j++)
{
    series.Points.Add(j, AllData.measure[i].DataGraph[j]);
}
.....

I am also attaching a video to fully understand the problem.

Attachment: test_vid_6bde2d73.zip

Yuvaraj Palanisamy · Answer

Hi Dmitriy Shilin, 
 
We have checked the reported problem “trackball label moved to follow corresponding datapoint when x-Axis have different type of axis” and we are not able to reproduce the reported problem at our end. Also, we have attached the sample for your reference. Please find the sample from the below link. 
 
Sample: https://www.syncfusion.com/downloads/support/forum/173229/ze/Trackball_MultipleAxis782842584  
 
Output: 
  
 
Could you please share us the modified sample with issue reproduced state which will be helpful to serve you better solution at the earliest. 
 
Regards, 
Yuvaraj.