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

[Mike Perham]

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.

mike

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?