Hover the blank(empty) spots

[Stunkata]

Hello,
i want to get the x value everywhere i hover.If i hover on a blank spot, i want to get the x value and then get all y values for this x point. Is it possible?
Example:

[AIMPED]

@Stunkata I don´t think that is possible with plotly. Even in dash the hoverData is only triggered, if hovering over an actual data point.

The only idea I had a while back to achieve something similar can be found here:

How to add new data point to Graph/canvas by single mouse click?

I understand. This is interesting! This is the solution I had in mind. If you do the callback clientside this could work quite well IMHO. But there is still room for improvement I guess. import json from dash import Dash, dcc, html, Input, Output, State import dash_bootstrap_components as dbc from dash.exceptions import PreventUpdate import plotly.express as px import numpy as np # create image and plotly express object fig = px.imshow( np.zeros(shape=(90, 160, 4)) ) fig.add_scatter( …

[matinh]

I created an example on CodePen, which is quite similar to what you desired. See here:

Cursor is always visible. Tooltip is only shown for data points, as this seems not possible like @AIMPED explained. But for charts with lot of datapoints (like you showed in your screenshot), a tooltip will be visible for almost all cursor movement.

Does this help?

Best Regards,
Martin