[Phpmyadmin-devel] Realtime charting

[Michal Čihař]

Hi

Dne Thu, 2 Jun 2011 13:05:48 +0200
Tyron Madlener <tyronx at gmail.com> napsal(a):

> After some testing and research I found out that:
> - The pma_pchart classes, by default, slice the picture into 20
> pieces, and that for every browser. It was implemented that way
> because IE8 limits data URIs to 32kb.
> - Images generated by pChart are around 20-40 kb in size.
> - IE7 does not support data URIs (=no pcharts for IE7 at all)
> - Whereas Highcharts works in IE7 and IE8 (according to the website
> also in IE6 but I didn't test that)
> 
> So from what I can see:
> - Highcharts works in IE7; pChart does not
> - Exporting images requires a server side export feature for
> Highcharts (which is going to be developed anyway for OpenGIS);
> Exporting in pChart would require either non-sliced images and thus
> breaking IE8 support or alternatively a server side export feature as
> well.
> - Highcharts is fast, interactive and animated, pChart is not (except
> for tooltips)
> - Highcharts allows realtime charts, pChart does not
> - Highcharts requires ~90kb minified and 2 files, pChart with its
> wrapper classes currently requires ~850kb and 18 files
> - Highcharts is still being actively developed (last change march
> 2011), pCharts 1.x is not (last change september 2008)
> 
> - If pCharts were to be replaced by Highcharts, it would not require
> 12 wrapper classes. Rather just 1 that allows for easy extension with
> $.extend() and is client side. Highcharts is imo significantly easier
> to use than pCharts, mostly because coding in javascript has some
> clear advantages over php (OOP-wise). Since charting is used only in 3
> places, it should be a matter of a few days to replace it.
> 
> - Compared with jQuery SVG: Highcharts is particularly made for
> charting, thus giving a great look&feel and is very easy to use as a
> developer; jQuery SVG is not, thus looking inappropriate for charting
> and will result in less readable and more complicated code (or
> requires time-intensive coding of wrapper classes/plugins which can
> maybe partly remedy those disadvantages)
> 
> 
> Hence my question, why haven't I been ordered to replace pChart with
> Highcharts already? ;-)

Thanks a lot for great analysis! I think it gives enough reasons to
switch from pChart to Highcharts :-).

-- 
	Michal Čihař | http://cihar.com | http://blog.cihar.com
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