How can I get exact x / y pixel coordinates of a marker / point?

[kdesai]

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Interactive Image Callbacks

There have been a few questions about tying callbacks to static images, see https://github.com/plotly/dash/issues/178 and https://stackoverflow.com/questions/48586208/ for example. I thought I’d open up an official Dash community discussion on this topic. Here is one approach: use the background image support in the dcc.Graph component and that component’s select tools. This example could be generalized a bit more to dynamically compute the dimensions of the image (right now I’m using square im…