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MightyKnighty
PostPosted: Sun Jun 08, 2008 9:43 am 
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Joined: Sun May 18, 2008 12:46 pm
Posts: 5
Location: UK
How can a display a legend in a chart in a MigraDoc document.
In pdfsharp I used chart.legend
In migraDoc I tried to use
Legend legend = chart.RightArea.AddLegend();
to add a legend on the right of a Bar2D chart type.

but then I get the following error:
System.NullReferenceException was unhandled by user code
Message="Object reference not set to an instance of an object."
Source="MigraDoc.Rendering"
StackTrace:
at MigraDoc.Rendering.TopDownFormatter.FormatOnAreas(XGraphics gfx, Boolean topLevel) in D:\My Documents\Visual Studio 2008\Projects\MigraDocLite\MigraDoc.Rendering\MigraDoc.Rendering\TopDownFormatter.cs:line 80
at MigraDoc.Rendering.FormattedTextArea.Format(XGraphics gfx) in D:\My Documents\Visual Studio 2008\Projects\MigraDocLite\MigraDoc.Rendering\MigraDoc.Rendering\FormattedTextArea.cs:line 57
......
Any suggestions on how I can get a legend to appear.

Many thanks
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ldelabre
 Post subject:
PostPosted: Fri Jun 13, 2008 7:39 am 
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Joined: Sat Apr 12, 2008 8:51 am
Posts: 10
I've got the same error :(

Any suggestions ?
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ldelabre
 Post subject:
PostPosted: Fri Jun 13, 2008 8:19 am 
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Joined: Sat Apr 12, 2008 8:51 am
Posts: 10
Ok here's what I did (and it seems to work) :

in MigraDocLite\MigraDoc.Rendering\MigraDoc.Rendering\TopDownFormatter.cs

Inside public void FormatOnAreas(XGraphics gfx, bool topLevel)

Change

Code:
        DocumentObject docObj = this.elements[idx];
        Renderer renderer = Renderer.Create(gfx, this.documentRenderer, docObj, this.areaProvider.AreaFieldInfos);               
        renderer.MaxElementHeight = maxHeight;

        if (topLevel && this.documentRenderer.HasPrepareDocumentProgress)
        {
          this.documentRenderer.OnPrepareDocumentProgress(this.documentRenderer.ProgressCompleted + idx + 1,
            this.documentRenderer.ProgressMaximum);
        }

        // "Slightly hacked" for legends: they are rendered as part of the chart.
        // So they are skipped here.
        if (renderer == null)
        {
          ready = idx == this.elements.Count - 1;
          if (ready)
            this.areaProvider.StoreRenderInfos(renderInfos);
          ++idx;
          continue;
        }


to

Code:
        DocumentObject docObj = this.elements[idx];
        Renderer renderer = Renderer.Create(gfx, this.documentRenderer, docObj, this.areaProvider.AreaFieldInfos);               

        if (topLevel && this.documentRenderer.HasPrepareDocumentProgress)
        {
          this.documentRenderer.OnPrepareDocumentProgress(this.documentRenderer.ProgressCompleted + idx + 1,
            this.documentRenderer.ProgressMaximum);
        }

        // "Slightly hacked" for legends: they are rendered as part of the chart.
        // So they are skipped here.
        if (renderer == null)
        {
          ready = idx == this.elements.Count - 1;
          if (ready)
            this.areaProvider.StoreRenderInfos(renderInfos);
          ++idx;
          continue;
        }
        renderer.MaxElementHeight = maxHeight;


(I moved the renderer.MaxElementHeight = maxHeight ...)
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MightyKnighty
 Post subject: Thank Idelabre
PostPosted: Sat Jun 14, 2008 11:37 am 
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Joined: Sun May 18, 2008 12:46 pm
Posts: 5
Location: UK
Thank Idelabre :D

You a true Star

That worked great for me too.... :idea:

I now have legends for my charts ....
Hooray. :lol:
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ldelabre
 Post subject:
PostPosted: Sat Jun 14, 2008 2:29 pm 
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Joined: Sat Apr 12, 2008 8:51 am
Posts: 10
Thank you ;)

Anytime 8)
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MH_2106
PostPosted: Sun Feb 07, 2010 10:35 pm 
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Joined: Mon Nov 23, 2009 5:23 pm
Posts: 16
Can someone help me and show me an example how to add values to the legend?

I always get an error in ObjectModelMeta.SetValue because there is no value 'open' in

Code:
 ValueDescriptor vd = this.vds[name];
      if (vd == null)
        throw new ArgumentException(DomSR.InvalidValueName(name));


this is my try to create this legend:

Code:
Legend bsnLegend = chartRequests.RightArea.AddLegend();
            bsnLegend.SetValue("open", seriesOpen);


I haven't found any other entry in the forum and now used legend in the example.

Please help!

Thanks!
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Thomas Hoevel
PostPosted: Mon Feb 08, 2010 9:26 am 
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PDFsharp Guru
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Joined: Mon Oct 16, 2006 8:16 am
Posts: 3111
Location: Cologne, Germany
MH_2106 wrote:
I always get an error in ObjectModelMeta.SetValue because there is no value 'open' in


You can only set the members of a Legend (Format or Style).

I never used the charts so I have no clue what they do - but I presume the contents of the Legend comes automatically from the Series.

_________________
Regards
Thomas Hoevel
PDFsharp Team
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