[rrd-users] Find the DEF and value at x, y on graph image (for mouse-over)?

Mike Perham mperham at gmail.com
Mon Nov 19 00:11:39 CET 2007

We're going to be using the fetch command to pull data out of RRD and
pass it to Flash in the browser so that we can do things like zoom,
mouse-over, etc (think Google Finance) but rrdtool does not provide
any support to do this on your own.


On 11/14/07, Peter Valdemar Mørch <swp5jhu02 at sneakemail.com> wrote:
> Hi,
> I'd like to be able to present a mouse-over tooltip showing the name of
> the graph, the current time, and the current value for a particular x,y
> point on a generated graph.  If there are two DEFs, it should display
> info for the one the mouse is "over" (or ideally "closest to" so the
> user doesn't have to be pixel-exact).
> I realize that this may involve som AJAX to fetch the data from RRD file
> on the server given the (x,y) on the image, or alternatively huge DATA
> structures in the HTML file, but am prepared to deal with that.
> Has this been done before? Does anybody know how to do that?

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