Printing Sharpplot Labels

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Printing Sharpplot Labels

Postby paulmansour on Thu May 06, 2021 10:54 pm

I'm investigating SharpPlot, and running the pie chart sample below that returns SVG. When I put this in an HTML page it displays nicely in the MS Web Browser Control, but when I print it using the same control or various other user agents, the text labels do not print.

Should the labels print? 

      ∇ {svg}←MyChart;⎕USING;data;exp;key;sp
  ⎕USING←'System.Drawing,system.drawing.dll' 'System.Drawing.Imaging' 'Causeway,sharpplot.dll'
  data←33 18 12 10
  exp←0 0 0 20
  key←'UK' 'France' 'Italy' 'Ireland'
  
  sp←⎕NEW SharpPlot                                 ⍝ Default size
  sp.Heading←'Sample pie chart'                     ⍝ Property
  sp.PieChartStyle←PieChartStyles.ValueTags         ⍝ Flag property with single flag
  sp.KeyStyle←KeyStyles.(CenterAlign+BottomAlign)   ⍝ Flag property with multiple flags
  sp.SetKeyText(⊂key)                               ⍝ Need to enclose the key vector because it is a single argument, rather than a list of arguments
  sp.SetColors ⊂Color.(Navy Maroon Teal Green)      ⍝ Need to enclose the vector because it is a single argument
  sp.SetMargins(42 48 36 18)                        ⍝ No need to enclose because the 4-item vector maps to 4 arguments
  sp.DrawPieChart(data exp)                         ⍝ No need to enclose here because the 2-item vector maps to 2 different arguments
   
  sp.SaveImage('samplepie.png' ImageFormat.Png)     ⍝ Save the chart as a PNG image, at default size
  svg←sp.RenderSvg ⍬                                ⍝ Return SVG image source
∇
paulmansour
 
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Re: Printing Sharpplot Labels

Postby RichardP|Dyalog on Fri May 07, 2021 1:01 pm

I am unable to reproduce your issue (I believe the labels should print) on

Code: Select all
      ]version
 Dyalog  17.0.35960 64-bit Unicode, BuildID 38943482           
 OS      Windows 10 or Windows Server 2016 (10.0.19042) 64-bit 
 SALT    2.8                                                   
 UCMD    2.3                                                   
 .NET    4.0.30319.42000                                       
 WS      17.0   

After doing,

Code: Select all
      svg←MyChart
      svg⎕NPUT'pie.svg'

I am able to view the svg in Firefox, Chrome and Internet Explorer and using Microsoft Print to PDF the labels are still there

However, on 18.0 and 18.1, I get the following errors:

Code: Select all
EXCEPTION: Index was outside the bounds of the array.
MyChart[13] sp.SaveImage('samplepie.png'ImageFormat.Png)     ⍝ Save the chart as a PNG image, at default size
            ∧
EXCEPTION: Index was outside the bounds of the array.
MyChart[14] svg←sp.RenderSvg ⍬                                ⍝ Return SVG image source
                ∧

Which my guess is something .NET related as 18 is using

Code: Select all
 .NET    .NET Framework 4.8.4341.0
and 17 is using
Code: Select all
 .NET    4.0.30319.42000


Which versions of things are you using?
RichardP|Dyalog
 
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Re: Printing Sharpplot Labels

Postby paulmansour on Fri May 07, 2021 2:17 pm

Richard,

Thanks for response.

Ok, the way you tried it worked fine for me too. It must be something to do with the fact or way that I have it embedded in a larger HTML document.

I will investigate more....
paulmansour
 
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Re: Printing Sharpplot Labels

Postby paulmansour on Fri May 07, 2021 2:51 pm

Ok, found the problem. My CSS (specifically for printing) starts out with this:

      * {
    box-sizing: border-box;
    font-size: 8pt;
    margin: 0;
    padding: 0;
}


It is the font size setting that is causing the problem. If I remove it, the SVG chart labels will print. I don't think it is inappropriate to default the font size like this for print media, but maybe I should do it another way.

Also, I would not have thought that it would affect the SVG coming out of Sharpplot, which appears to have specific font size info, but I'm just learning about SVG....
paulmansour
 
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Re: Printing Sharpplot Labels

Postby paulmansour on Fri May 07, 2021 3:01 pm

This old stack overflow question solves the problem:

https://stackoverflow.com/questions/206 ... -font-size

Instead of using * to set the font, use the <body> selector. This works even though the SVG is under the body tag. I guess using * to reset the font for a document is not an appropriate technique... probably I don't even really understand what the * is doing...
paulmansour
 
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Joined: Fri Oct 03, 2008 4:14 pm
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