SVG export flawed for line series.
lazarus / 55-TAChart

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jwdietrich · 2013-03-03 17:59

SVG versions of line series charts are faulty when created by the SVG
drawer. They don't match the screen representation and in concrete,
they are in black and white only and contain undesired filled regions.

See the attached demo file for reference.

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jwdietrich · 2013-03-03 18:05

I have reported this bug at
http://bugs.freepascal.org/view.php?id=23982. This report also
contains a screenshot that the SVG version should resemble and a demo
application.

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wp · 2013-03-04 16:11

I could fix the issue in your demo in the following way:
In TADrawerSVG, procedure TSVGDrawer.PolyLine, replace the string mask
of the WriteFmt method by '<polyline points="%s" style="fill:none;
%s"/>'. The "fill:none" avoids closing the polygon, and the formerly
present "stroke" results in an improper statement because the "stroke"
is additionally added by the StyleStroke method.In TASeries, procedure
TLineSeries.DrawSingleLineInStack, subprocedure DrawLines, replace
"ADrawer.Pen := LinePen" by "ADrawer.SetParams(LinePen.Style,
LinePen.Color)".This modification passes the line color to the drawer
correctly.See also your BugTracker report for a patch.

Unfortunately, Ask seems to be quite busy these days, but I am sure
that this patch will soon be added to the official version.

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jwdietrich · 2013-03-05 01:36

Thank you for providing this interesting information. It will help to
fix an old bug in one of my applications.

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jwdietrich · 2014-06-18 18:33

Thanks for fixing this issue.