Layout callbacks dont fire on responsive FigureWidget

[simeonschwarzenberg]

Hi, im currently working with plotly in python shiny using shinywidgets. Now there seems to be an issue coming from plotly, where the callbacks dont fire for a responsive FigureWidget. Specifically callbacks installed on the widgets width. This worked with plotly v5.24.1. There i could resize the browser window, which would then resize the FigureWidget (because it is responsive) and this would trigger the width callback. This doesnt work anymore in plotly v6.2.0.

Also, every callback would be initially run when the FigureWidget is first rendered in plotly v5.24.1. This also doesnt seem to happen anymore. Is this deliberate?

[gvwilson]

thanks for the report @simeonschwarzenberg - can you please include a short example so that we can try to reproduce your problem at this end? thanks - @gvwilson

[simeonschwarzenberg]

Thanks for the quick reply.
Here is a small example:

from shiny import App, ui
from shinywidgets import render_plotly, output_widget
import numpy as np
import plotly.graph_objs as go

app_ui = ui.page_fluid(
    output_widget("plot")
)

def server(input, output, session):
    @render_plotly
    def plot():
        x = np.linspace(0, 10, 100)
        y = np.sin(x)
        fig = go.Figure(data=go.Scatter(x=x, y=y, mode="lines"))
        fw = go.FigureWidget(fig)
        fw.layout.on_change(_update_x_range, "xaxis.range")
        fw.layout.on_change(_update_width, "width")
        return fw

    def _update_x_range(layout, x_range):
        print(x_range)

    def _update_width(layout, width):
        print(width)

app = App(app_ui, server)
if __name__ == "__main__":
    app.run()

When running it in plotly v6.2.0 you dont see any initial print, only if you zoom in will the x_range be printed. Width does never print, even if the window is resized. Both the initial call and the working callbacks are present in plotly v5.24.1.

It is important to say, that this will not work with the newest shinywidgets release, due to callbacks getting dropped. A change has already been made, tho, to enable plotly callbacks. This is present in the shinywidgets master branch. (See: posit-dev/py-shinywidgets#206).

Edit: The example should be run using shinywidgets v0.7.0 and up

[gvwilson]

thanks very much - shinywidgets isn't a priority, but I'll see if I can get someone to look at this.