When a data point is expected to appear in the chart ?

[Angelo]

I am facing some problem that I cannot figure out where it is. I will try to describe the steps I did

I am reading a file with X and Y values.
before adding the values to a Serie, I set :

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frm.TChart1.AutoRepaint = false. 

Then I add the values to the Serie:

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frm.TChart1.Series(0).AddXY Xdata, Ydata, "", &H80&

After adding the data values, I perform the checking of the axis scales and adjust them accordingly. Then, after adjust the scales set the autorepaint to true and perform a repaint:

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frm.TChart1.AutoRepaint = True
frm.TChart1.Repaint

Here comes what I don´t understand.

After the Repaint method, the chart do not have any point. If I check the count property of the chart, it has at least one point:
frm.TChart1.Series(0).count returns the value 1 or greater.

So my question, when does teechart decides to display the data on the chart ?

Regards.
Angelo

[Marc]

Hello Angelo,

With one point in the chart you typically see the axes with just one gridline running into the chart. What do you see?

You may not see the point if the Pointer visible isn't true (for a LineSeries). What type of Series are you using?

Regards,
Marc Meumann

[Angelo]

Hi Marc;
I am using a Point serie.

I did run step by step (vb6 !! ) the code.

I did see the all the properties of the chart been applied, but for some reason I start to see points in the chart only after the second one added.

Maybe I am messing with autorepaint refreshdata etc. I need to recheck everything again.

Marc, I did search in this forum for refresh, refreshdata, repaint and I noticed that several links (posted by the support) are not redirecting to the correct pages anymore but they are all redirecting to the initial Steema homepage, something like old url´s are redirected to the default home by webserver, instead to display a 404 error page.

[Marc]

I tried this code (TeeChart AX 2023 and VB6:

added a Pojnt Series to Chart. No other changes.

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Private Sub Command1_Click()
  TChart1.AutoRepaint = False
  
  TChart1.Series(0).AddXY 10, 10, "", clTeeColor
  
  TChart1.AutoRepaint = True
  TChart1.Repaint
End Sub

vbpoint.jpg (12.46 KiB) Viewed 45389 times

It painted ok. Maybe worth checking with a basic run away from your project to confirm that no other settings are interfering.

Thank you for the comment on broken links in the forums. We'll review what can be done with them.

Regards,
Marc