Scrolling problems

[mhenley]

I have the following problem:

A graph with only one serie: a bar serie. This series has a lot of bars that needs to be scrolled.
When the series renders for the first time: the space beetween the bars is fine.
When I do the scrool using the following code:

chart1.BottomAxis.Scrool(1);

the space beetween the bars gets rid ( I mean: the bars are without spaces beetween adjacents bars).
This is a bad looking for the end user. Please help.

Thanks in advance,
Miguel Henley

[Mark]

Hi Miguel

Not sure if this is what you mean. I've been scrolling my charts programatically. I use the following axes method:

Code: Select all

Chart1.Axes.Bottom.SetMinMax(1, 50);

If you're using datetimes for your x axis then the min/max needs to be datetimes of course. i.e. it's not an index it's the actual x values.

Hope that helps.

Regards
Mark

[Yeray]

Hello Miguel,

I don't see any problem or any strange behavior with the code below. Could you please modify it or arrange a simple example project we can run as-is to reproduce the problem here?

Code: Select all

procedure TForm1.FormCreate(Sender: TObject);
begin
  Chart1.View3D:=false;
  Chart1.AddSeries(TBarSeries).FillSampleValues(100);
  Chart1[0].Marks.Visible:=false;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  Chart1.Axes.Bottom.Scroll(1);
end;

[mhenley]

Hello,
If you setup the property Points per Page you will see the problem.

The first image shows the graph when the application fires up (as suggested by your example).
The second image shows the graph after I press the Scroll button that trigger Chart1.Axes.Bottom.Scroll(1);
Please, see the images below:


Before Scroll:

Before Scroll

FirstGraph.jpg (78.17 KiB) Viewed 6643 times

After Scroll:

After Scroll

AfterScroll.jpg (64.54 KiB) Viewed 6648 times

[Yeray]

Hello Miguel,

It still works fine for me here adding the following line to the TForm1.FormCreate in the example above:

Code: Select all

Chart1.MaxPointsPerPage:=20;

I'm using TeeChart v2011.03. Are you using the latest TeeChart version?

[mhenley]

I am using TeeChart version 8.05.
This is the license that I have for now.

Please, test it in version 8 - so you can see the problem.

Regards,
Miguel Henley

[Yeray]

Hello Miguel,

I've been able to reproduce it with v8.05 and v8.06 but it's not reproducible anymore for me here from v8.07.
Could you please try the v8.07 or the v8.08?