AntiAlias issue

[johnnix]

Hello,

I am using TeeChart 2011.03.30407 and I wish someone to inform me if the following bug is fixed in the latest release.

1. Add a TChart into a form
2. Double click and from the editor add a TLineSeries
3. Go to Tools->Other and add the Anti-Alias tool
4. The line should now miss several segments

Thank you all for your time

Regards

[Yeray]

Hi Johnnix,

Was this identified in the past? If so, do you know the ticket we assigned to it or the forum thread where we discussed it? I'm not able to find it.

In case it wasn't discussed in the past, I should be missing some relevant step because I can't reproduce it either with v2011.03 nor with the actual v2012.05. So, could you please arrange a simple example project we can run as-is to reproduce the problem here?

Thanks in advance.

[johnnix]

Hello,

Please find a sample app that is not working with my version of TChart.

Regards

[Yeray]

Hi Johnnix,

That's what I get with it. I'm not sure to see any "missing segment":

AntiAlias.png (29.41 KiB) Viewed 18840 times

NonAntiAlias.png (18.1 KiB) Viewed 18829 times

[Marco]

Hello Yeray,

I am using Teechart 2011.04.41118 for C++ builder and I come across the same issue described in this post.
With the AntiAlias tool on a graph, all non horizontal lines are invisible.

Example with antialias tool :


And without this tool :


Is it a way to correct this problem ? Do I follow the suggestion you gave in this thread http://www.teechart.net/support/viewtop ... =antialias ?

Thanks in advance and best regards.

Marco

[Yeray]

Hi Marco,

I've been able to reproduce the problem with the v2011.04 and the code below:

Code: Select all

uses Series, TeeAntiAlias, TeeGDIPlus;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Chart1.View3D:=false;
  Chart1.Legend.Visible:=false;

  Chart1.Tools.Add(TAntiAliasTool);
  //Chart1.Canvas:=TGDIPlusCanvas.Create;

  with Chart1.AddSeries(TLineSeries) do
  begin
    Pen.Width:=2;

    Add(0);
    Add(100);
    Add(100);
    Add(0);
  end;

  Chart1.Axes.Left.SetMinMax(0, 120);
  Chart1.Axes.Bottom.SetMinMax(0.25, 2.5);
end;

However, I can't reproduce it any more with the actual version.
Also, if I use GDIPlus instead of the TAntiAliasTool as you pointed, it seems to work fine in v2011.04.

Code: Select all

  //Chart1.Tools.Add(TAntiAliasTool);
  Chart1.Canvas:=TGDIPlusCanvas.Create;

[Marco]

Hello Yeray,

Is this code also usable with C++ builder ? :

Code: Select all

Chart1.Canvas:=TGDIPlusCanvas.Create;

I can't use this "TGDIPlusCanvas" type.
I add

Code: Select all

#pragma link "TeeGDIPlus"

but TGDIPlusCanvas is unknown.

Thanks

[Yeray]

Hi Marco,

Right, that's Delphi code. It shouldn't be difficult to translate Delphi code but if you have problems with it, please tell us what exact IDE are you using and we'll try to check it in a very same environment than yours.

[Marco]

Hi Yeray,
I would like to use this code with Borland C++ Builder XE, with teechart v2011.04.
Thanks in advance

[Yeray]

Hi Marco,

the following code works fine for me here in XE both with TeeChart v2011.04 and the actual v2012.07:

Code: Select all

void __fastcall TForm1::FormCreate(TObject *Sender)
{
  Chart1->View3D=false;
  Chart1->Legend->Visible=false;

  Chart1->Canvas=new TGDIPlusCanvas();

  TLineSeries *line1 = new TLineSeries(this);

  Chart1->AddSeries(line1);
  line1->Pen->Width=2;
  line1->Add(0);
  line1->Add(100);
  line1->Add(100);
  line1->Add(0);

  Chart1->Axes->Left->SetMinMax(0, 120);
  Chart1->Axes->Bottom->SetMinMax(0.25, 2.5);
}

I just had to add the TeeGDIPlus header in the .h:

Code: Select all

#include "Chart.hpp"
#include "TeEngine.hpp"
#include "TeeProcs.hpp"
#include "Series.hpp"
#include "TeeGDIPlus.hpp"

[Marco]

It works for me. Thank you !

The final rendering is different that with antialias tool but not so bad.

[Yeray]

Hi Chacal,

If you prefer the TAntialiasTool, the only way I see for you is to update to the current version.