Bug in THistogramSeries

[xray]

Dear TChart Team,

I have found a bug in Version 8.04. The display/bottom axes of THistogramSeries is obviously wrong. The data is displaced on the x-axis.
To reproduce this: Add a HistogramSeries to a Chart. Then fill the HistogramSeries using this code:

procedure TForm2.FormCreate(Sender: TObject);
var
i: Integer;
Pos: Double;
begin
HistogramSeries.BeginUpdate;
try
Pos := -1;
HistogramSeries.Clear;
for i := 0 to 100 do
begin
if (Pos > 0.5) and (Pos < 0.7) then
HistogramSeries.AddXY(Pos, 50, '', clRed)
else
HistogramSeries.AddXY(Pos, 0, '', clRed);
Pos := Pos + 0.05;
end;
finally
HistogramSeries.EndUpdate;
HistogramSeries.Active := True;
Chart.Repaint;
end;
end;

Then you will see that the maximum is displayed arround one (1) on the X-axis and not arround 0.6.
This worked previously using version 7.x

best regards,

[Yeray]

Hi xray,

We've tested your code, reproduced the problem with the 8.04 installation and solved it. So this is solved for the next maintenance release.

As you are a source code customer, we will give you a link to download the actual sources as soon as possible.

[mbruch]

I am a source code customer,

Please send me the patch!

Best Regards
Michael

[Narcís]

Hi Michael,

Sure, just sent current sources.

[mbruch]

Hi,

after some zooming test the bug appeared!

If you zoom the content the x axis is mixed with some data points.

samples:

[Yeray]

Hi Michael,

Please, could you send us a simple example project we can run "as-is" to reproduce the problem here?
You can either post your files at news://www.steema.net/steema.public.attachments newsgroup or at our upload page.

[sIT]

Hi xray,

We've tested your code, reproduced the problem with the 8.04 installation and solved it. So this is solved for the next maintenance release.

As you are a source code customer, we will give you a link to download the actual sources as soon as possible.

Hi,
I have the same problem.
Please send me the link to the source code too.
Thank You.

I have a second problem.
When I call EditChart with a Histogram Series and click on the series then the property Series.General.Depth.Auto will automatically deativated!

Gerhard

[Yeray]

Hi Gerhard,

I've sent you a mail with the link to download the VCL sources.

Regarding the other Histogram issue, I'm not sure to understand what are you exactly trying to achieve. Could you please send us a simple example project we can run "as-is" to reproduce the problem here?
You can either post your files at news://www.steema.net/steema.public.attachments newsgroup or at our upload page.

[sIT]

Hi Gerhard,

I've sent you a mail with the link to download the VCL sources.

Regarding the other Histogram issue, I'm not sure to understand what are you exactly trying to achieve. Could you please send us a simple example project we can run "as-is" to reproduce the problem here?
You can either post your files at news://www.steema.net/steema.public.attachments newsgroup or at our upload page.

Hi,
I upload an example program where you can reproduce the error.
I'm using Delphi 2009 for compiling.
Click on Edit -> Series1.
Result: The General Auto Property will be disabled!

[Yeray]

Hi Gerhard,

I'm afraid that I'm not able to reproduce your problem with TeeChart v8.04 neither with actual sources. Are you still suffering this with the sources I sent to you yesterday?

Note that we recommend you to use TeeRecompile Tool to install the sources, but even if you used it, could you please verify your IDE's search path and library path?

[sIT]

Hi Gerhard,

I'm afraid that I'm not able to reproduce your problem with TeeChart v8.04 neither with actual sources. Are you still suffering this with the sources I sent to you yesterday?

Note that we recommend you to use TeeRecompile Tool to install the sources, but even if you used it, could you please verify your IDE's search path and library path?

Hi Yeray,
I checked all pathes and the complete installation. There is all Ok. I compiled the sources with TeeRecompile.

But what I find is that I'm not able to change the Depth property in THistogramSeries. When I change this property during design time the Depth will not be store in the dfm file!
With TLineSeries all is working well.

[Yeray]

Hi Gerhard,

Now I understood and could reproduce the problem. So I've added it to the wish list to be fixed in future releases (TV52013974).

Thanks.

[mbruch]

Did you look at my uploaded project?

[Yeray]

Hi mbruch,

Excuse us, we haven't noticed that you sent a project.

Now, I've seen it and your problem seems different than the discussed in this thread.

The problem here is that you have two series populated with different interval X values and the same X axis assigned. Then, when axis labels try to be shown automatically, there causes some conflict.

First of all I think you should have present what series labels you want to show (and place it at the top of the series list), and then prepare you series and your bottom axis to show the labels correctly. Here there are some properties that may help you in this:

Code: Select all

	chrtDruck->Axes->Bottom->LabelStyle=talValue;
	chrtDruck->Axes->Bottom->DateTimeFormat="dd/mm/yyyy hh:mm";
	chrtDruck->Axes->Bottom->LabelsSeparation=15;
	chrtDruck->Series[0]->XValues->DateTime=true;
	chrtDruck->Axes->Bottom->Increment=DateTimeStep[dtOneDay];

[mbruch]

Hi Yeray,

in Version 4 all worked fine!

All series have datetime as xaxis all the same.

on one series I set a label information and style is label not legend!

Please check

>> ok if I use your supplied code it works!

Best Regards
Michael