PDF export screwed-up chart

[peterlepan]

Hi,
I try to export a TeeChart to a pdf-file. The chart is from the template gallerie, the Concentric Donuts.

donut_before.jpg (49.61 KiB) Viewed 22070 times

After export, the chart is screwed-up.

donut_after.jpg (50.24 KiB) Viewed 22065 times

At the pdf-file, there are only the marks from the chart but no chart.

pdfoutput.jpg (6.19 KiB) Viewed 22063 times

Please can you help me?

sincerely yours

Peter

[Yeray]

Hi Peter,

The concentric Donuts Template doesn't look as the one you posted above for me here.
Here it is how it looks for me:

2014-09-29_1343.png (22.4 KiB) Viewed 22031 times

And here it is the pdf I get with this code:

Code: Select all

uses Series, TeePDFCanvas;

procedure TForm1.FormCreate(Sender: TObject);
var i: Integer;
begin
  Chart1.Title.Caption:='Concentric Donuts';

  for i:=0 to 2 do
    with Chart1.AddSeries(TPieSeries) as TPieSeries do
    begin
      FillSampleValues(4);
      Marks.Hide;
      MultiPie:=mpConcentric;
    end;

  TeeSaveToPDFFile(Chart1, 'C:\tmp\Chart1.pdf');
end;

Chart1.zip

(7.45 KiB) Downloaded 790 times

As an alternative, you could print the chart with a virtual pdf printer:

Chart2.zip

(15.82 KiB) Downloaded 771 times

[peterlepan]

Hi Yeray,

you are right, it looks a bit different but I use the concentric Donuts Template. I like to show the values as 100-perscent-columns, the middle of the circle is 100%. So I use the concentric Donuts and give all values the same width. Then I set the color of the values from outer (0%) to inner (100%) of the circle. What chart-type can I use as alternative to my solution? The new Rose Series show the values from inner circle to outer circle and use polar coordinates, but I need free scaling for the circle, not 360°.
Have you an idea what chart type better fit my needs?

Kind regards

Peter

[Yeray]

Hello Peter,

I've been trying to do a demo using the Rose series. I found some issues but I one problem I can't find how to workaround: some circle labels seem not to be drawn depending on the number of values.

RoseTest.zip

(2.04 KiB) Downloaded 781 times

On the other hand, we'd be pleased to investigate the problem exporting the concentric pies, but we'd need a simple example project we can run as-is to reproduce the problem here.

Thanks in advance.

[peterlepan]

Hello Yeray,

here is al little sample projekt about my problem.
By the way, an other problem is the positioning of the marks. I set the Marks on the most outer series, but the width of the serie is so big, that some other series are covered. I use curious parameters for the marks-arrow as workaround. Is there an other way in my case to fix the width of the outer serie independently from the marks?

donuts.zip

(54.23 KiB) Downloaded 785 times

Kind regards

Peter

[Yeray]

Hi Peter,

here is al little sample projekt about my problem.
By the way, an other problem is the positioning of the marks. I set the Marks on the most outer series, but the width of the serie is so big, that some other series are covered. I use curious parameters for the marks-arrow as workaround. Is there an other way in my case to fix the width of the outer serie independently from the marks?

I could reproduce the problem with your project when exporting the chart to a pdf.
However, it seems to work fine if I print the chart using a virtual pdf printer, instead of exporting the chart to a pdf.

I've been trying to do a demo using the Rose series. I found some issues but I one problem I can't find how to workaround: some circle labels seem not to be drawn depending on the number of values.

I've corrected the example above and this seems to work better.
Exporting to a pdf file works better than with the TPieSeries, but not perfect: the labels in the main chart disappear. However, printing the chart with a virtual pdf printer also works fine:

Code: Select all

uses TeePDFCanvas;

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

  with Chart1.AddSeries(TRoseSeries) as TRoseSeries do
  begin
    Pointer.Visible:=false;
    Pen.Visible:=false;
    Color:=clWhite;
    CircleBackColor:=RGB(0,0,128);

    GetHorizAxis.Grid.Visible:=false;
    GetVertAxis.Grid.Visible:=false;
    GetHorizAxis.MinorTicks.Visible:=false;
    CircleLabelsRotated:=true;
    LabelsMargin:=10;

    OnGetCircleLabel:=roseGetCircleLabels;
  end;

  Chart1.Axes.Visible:=false;

  TrackBar1.Max:=200;
  TrackBar1.Min:=10;
  TrackBar1.Position:=29;
  TrackBar1.Frequency:=10;
end;

procedure TForm1.recalcAngles;
var i: Integer;
begin
  with Chart1[0] as TRoseSeries do
  begin
    for i:=0 to Count-1 do
      AngleValue[i]:=i*360/Count;

    AngleIncrement:=(AngleValue[1]-AngleValue[0]) / 2;
  end;
end;

procedure TForm1.roseGetCircleLabels(Sender:TCustomPolarSeries; const Angle:Double; Index:Integer;
                                     var Text:String);
var i: Integer;
begin
  Text:='';
  with Chart1[0] as TRoseSeries do
    for i:=0 to Count-1 do
      if Round(Angle-AngleIncrement)=Round(AngleValue[i]) then
        Text:=Labels[i];
end;

procedure TForm1.TrackBar1Change(Sender: TObject);
var i, tmpValue: Integer;
begin
  with Chart1[0] as TRoseSeries do
  begin
    Clear;
    for i:=0 to TrackBar1.Position-1 do
    begin
      tmpValue:=Round(random*100);
      AddPolar(tmpValue, tmpValue, IntToStr(tmpValue));
    end;
      recalcAngles;
  end;

  Label1.Caption:='Num Values: ' + IntToStr(TrackBar1.Position);
end;

2014-10-06_1256.png (52.65 KiB) Viewed 21965 times

[peterlepan]

Hi Yeray,

your sample works fine, but I have one problem. I need to show the values from outer to inner. The outer of the circle is 0% and the center of the circle stands for 100%. If I show the difference to 100% with the rose-serie, I see no chance to change the color for a single value from outer to inner. These color is set with the CircleBackColor.

Oh, I have an idea! I use a second rose-serie to set the color of my single values!

Thank your for your inspiration!

Best regards

Peter

[peterlepan]

Hi Yeray,

only one question, how can I put the labels in the foreground? I have the labels taken in the inner of the circle, but some of them are invisible because they are covered from the rose-serie.
Have you a solution for this problem?

roselabels.jpg (51.66 KiB) Viewed 22014 times

Best regards

Peter

[Yeray]

Hi Peter,

Oh, I have an idea! I use a second rose-serie to set the color of my single values!

Thank your for your inspiration!

Great!
I'm glad to be helpful!

only one question, how can I put the labels in the foreground? I have the labels taken in the inner of the circle, but some of them are invisible because they are covered from the rose-serie.
Have you a solution for this problem?

There's a property for that:

Code: Select all

Series1.CircleLabelsInside:=false;

[peterlepan]

Hi Yeray,

the rose serie has a cleaner look then the concentric donuts. But I have one Problem. I like to put the labels inside the circle, to save some space around the chart. If the labels-text get a bit longer then 3 numbers, the labels on the left side are not symmetric positioned to the labels on the right side:

rose_labels.jpg (45.19 KiB) Viewed 21958 times

The labels loose the assignment to its chart-values.
If I put the marks at the concentric donuts inside the circle, I nearly get a circle:

donut_labels.jpg (66.66 KiB) Viewed 21963 times

Each segment get its right label.

Is there an option at the rose serie, to position the labels in the circle without loosing the assignment to the values?

Best regards

Peter

[Yeray]

Hi Peter,

I've added a few new tickets to the public tracker:
- Rounded/Circled Segments in the TRoseSeries
- Improve labels in TRoseSeries
- White space between the slices in concentric Pie/Donut

[peterlepan]

Hi Yeray,

I see a new version of TeeChart, have you put some improvements to the rose-serie? (especially labels?)

Best regards

Peter

[Yeray]

I see a new version of TeeChart, have you put some improvements to the rose-serie? (especially labels?)

I'm afraid not yet, Peter.
I've incremented the priority of the ticket Improve labels in TRoseSeries

[jdom]

sorry for the minor threadjack, am not sure how to upvote for features, but would like to add an enthusiastic vote for moving "Rounded/Circled Segments in the TRoseSeries" up the priority list. thank you! (if it will be part of the Xamarin.Forms release, too...)

[Yeray]

Hello,

sorry for the minor threadjack, am not sure how to upvote for features, but would like to add an enthusiastic vote for moving "Rounded/Circled Segments in the TRoseSeries" up the priority list. thank you! (if it will be part of the Xamarin.Forms release, too...)

Added to .NET Xamarin.Forms:
http://bugs.teechart.net/show_bug.cgi?id=1132

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