Plot is fantastic - thanks so much!

Is there a way to hook into the interactive features of plot so, for instance, the user could click to add data or drag data points around?

I'm using plot/dc to draw onto a canvas, and I'd be more than happy just to be able to ask a plot to translate a pixel position to the corresponding axes' positions. I know that plot does this for the zooming feature, but is there a way for external code to do it?

Thanks,
Dave
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