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dr|z3d
zzz: don't know if you recall a brief conversation we had before about svg graphs with a library to handle conversion from rrd4j. anyways, xmlgraphics.apache.org/batik/using/svg-generator.html
dr|z3d
looks promising. there's also github.com/haraldk/TwelveMonkeys which leverages the above.
zzz
dr|z3d, what's your svg idea?
dr|z3d
zzz: in essence, render the graphs as svgs.
zzz
yeah but why
dr|z3d
and perhaps later, add some interactivity.
dr|z3d
the why is much better quality output.
zzz
yeah, well there's two parts to the apache thing
zzz
1) making svgs in java, great, but other than smaller graphs, maybe quality, not that interesting
zzz
2) manipulating the svg as part of the DOM (interactivity)
dr|z3d
that would be the scripting module I think, no?
zzz
that's where it gets interesting. see e.g. fivethirtyeight.com Biden approval tracker
dr|z3d
yeah, scroll backwards and forwards in time, that sort of thing, zoom, tooltips at the pointer etc.
zzz
the thing is, the apache lib is talking about DOM manipulation via a java applet which sounds positively stone age
zzz
the modern way would be js which I assume is what 538 does. nobody's loading java applets off the web
dr|z3d
indeed not, forget that part. the scripting would be the way to go.
zzz
but I think you'd want something already adapted specifically for rrd4j output. We may have taken a look at something long ago
zzz
or something that is specifically chart-oriented
zzz
because you need to find the element tags for each line, the axes, legend, etc
dr|z3d
yeah, that would be phase 2. phase 1 would be just getting the graphs rendered as svgs. that part looks fairly uncomplicated.
zzz
sure but don't bother with phase 1 unless you finish phase 2 ))
dr|z3d
haha
dr|z3d
let's see if we can turf up something vaguely useful.
dr|z3d
I guess you're hoping for something along these lines, re manipulation: github.com/oetiker/RrdGraphJS
zzz
not that one, but we've looked at similar before
zzz
don't want to discourage you but you may end up watering the turf with your tears
dr|z3d
I think I'd be happy enough with just svgs being rendered instead of bitmaps. bitmaps look pretty bad at hidpi.
dr|z3d
they don't look great at any dpi, to be honest. functional, but not great.
dr|z3d
as for what we looked at before, if that was something I referenced, I don't think it was the "full package", more just a bitmap -> svg transcoder.
zzz
so in theory, you tell rrd4j that you want a year-wide graph, 10K pixels high and 100K wide, output as svg, hope it doesn't blow up, and shrink/crop/adjust the dom in js
zzz
sounds like a big project, not easy
dr|z3d
or you'd just stream the data as required and render on the fly, perhaps?
dr|z3d
I agree, phase 2, some work involved. phase 1 looks like a shoe-in.
zzz
sure, just re-render server-side on every js requset with XHR, that's a lot easier, but you can do that today with PNG and js, that's what RrdGraphJS looks to be
dr|z3d
if you can do that with png, you can do it just as well with svg, probably. the batik lib just builds on the java2d lib.
dr|z3d
not something I've done much with, if anything, but using json to stream the graph data might also be doable, so you're not re-rendering the entire graph on every xhr request.
dr|z3d
possibly this: sourceforge.net/projects/rrd2svg is what we looked at before, not sure.
zzz
the single graph page is most of the way there already, just hang js off all the bigger/smaller/older/etc. buttons
zzz
that's straightfoward and worth doing. the rest, not so much
dr|z3d
the other thing we get with svgs which I forgot to mention is css support, so no need for kludgy theme-specific hacks.
dr|z3d
(see the sidebar mini-graph in the dark theme for one such nasty, nasty hack :))
acetone
dr|z3d: zzz: powerful frontend lunched: outproxy.acetone.i2p
dr|z3d
nice, acetone
dr|z3d
not entirely sure displaying addresses is a good thing, but that's your call.