Tim Docker wrote:
Peter wrote:
Has anyone got some code for drawing charts? I don't mean
graphs of functions, ala
http://dockerz.net/twd/HaskellCharts
...
I would like something that can generate PNGs in memory, i.e. not
directly to a file.
The library at the above URL supports a range of backends through the
(nice to use) cairo graphics API. In memory images are supported. Also,
it's by no means just graphs of functions - that just happens to be
several of the demos.
I'd like 2D pie charts, bar charts and something like a google-o-meter.
An the moment it does line charts and a few variants of these. I'll add
pie and bar charts when I need them - patches in the meantime gratefully
accepted.
Tim
I was using the HaskellCharts library and needed the same two things; so
i rolled a quick and dirty pie chart generator (Barchart is on the TODO
list).
http://72.167.145.184:8000/Screenshot.png
http://72.167.145.184:8000/PieChart.hs
----
x <- widgetGetDrawWindow canvas
y <- widgetGetSize canvas
renderWithDrawable x (f y)
where f = PieChart.graph "title" 0x548B54 [(50.0,"A"), (50.0,"B")]
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