BorlandTalk.com

Clive · Guest

Hi,

I'm experiencing a strange problem when adding y values that are less
than 1 to a bar series.

This is the code I use to create and initialise the series:
fSpectrumSeries := TBarSeries.Create(Self);
with fSpectrumSeries do
begin
BarPen.Visible := False;
CustomBarWidth := 6;
Marks.Visible := False;
Multibar := mbNone;
ParentChart := fAmplitudeSpectrum;
SideMargins := False;
end;

This is the code I use to populate my series with data:
fAmplitudeSpectrum.Series[0].AddXY(1, 0.0158);
fAmplitudeSpectrum.Series[0].AddXY(2, 0.0024);
fAmplitudeSpectrum.Series[0].AddXY(3, 0.00078);

If I have fAmplitudeSpectrum.LeftAxis.Automatic set to True then the
program freezes at runtime and the panel containing fAmplitudeSpectrum
simply shows whatever is behind it i.e. it looks like it hasn't painted
the TChart at all.

If I precede the population of the values above by the following line:
fAmplitudeSpectrum.Series[0].AddNullXY(1, 1, '');
then it works fine, except that the y axis maximum is now 1 and
consequently the small values I added are barely visible because of the
scaling.

Therefore, I tried setting fAmplitudeSpectrum.LeftAxis.Automatic to
False and I manually set the LeftAxis maximum to the highest value
entered multiplied by 10%.
fAmplitudeSpectrum.LeftAxis.Maximum := highestMagnitude * 1.1;
However, this also caused a freeze as above.

Has anyone experience any problems like this before?
Does anyone know of a fix/solution/workaround?

This has been giving me a headache for a while now so your help would
be VERY MUCH appreciated!!!

Clive · Guest

Does no-one have any ideas about this then?

Robert Dede · Guest

Hello,

Sorry, not sure about your current charting problem, but if your problems
don't get answered, you may want to check out www.gigasoft.com. Our
charting is known for its stability, features, attention to rendering
detail, and customer support and service. Native VCLs included as well as
WinForm, WebForm, ActiveX, and pure DLL interfaces.

best regards,

Robert Dede
Gigasoft, Inc.

"Clive" <clive.wickham (AT) era (DOT) co.uk> wrote

Chris Ireland · Guest

Clive wrote:

Clive · Guest

Apologies for not supplying the relevant information earlier. I am
using Delphi 6 (update pack 2) with TeeChart Standard 4.04.