Feature Request: Add hover inspection Image glyphs

[ofirsa]

Hi, I hope this the right place to ask my question.
is it possible to implement the Hover Tool on image in such a way that when I moving my mouse on the image pixels, I get and information on the pixel below the mouse, like the pixel coordinates and pixel value.
I would be glad to get an example.
Thanks
Saar

[birdsarah]

Hi @ofirsa, our issue tracker is becoming too large to manage easily. We have to reserve it for feature requests and bug reports only, to have any hope of taming it. This kind of general support question should go to the general public mailing list:

https://groups.google.com/a/continuum.io/forum/#!forum/bokeh

[jbednar]

Sorry to revisit this old issue, but as far as I can tell it is still valid. Sarah closed it as a support question, but to me it sounds like either a feature request (can images please support hover information like other glyphs do) or a bug report (images don't support hover information like they should), as requested.

In either case, what's the answer? Is there some fundamental reason why Image shouldn't support hovering to reveal the pixel coordinates and the value of the image at that point? We will need this in our work, and can start working on a PR if that's appropriate.

[jbednar]

There's some relevant discussion on the Google Group, but nothing that indicates to me that this feature request is somehow invalid or not feasible:

https://groups.google.com/a/continuum.io/forum/#!searchin/bokeh/hover$20tool$20image|sort:relevance/bokeh/W-n34ElNlRo/O7_eut-5DwAJ

https://groups.google.com/a/continuum.io/forum/#!searchin/bokeh/Hover$20image/bokeh/fOlnivwLwvw/miZDTdA8CQAJ