Click Event Data

Mix.install([
  {:plotly_ex, "~> 0.3"},
  {:kino, "~> 0.18"}
])

Section

PlotlyLive.subscribe/2 registers the current process (or a given pid) to receive {tag, event_map} messages whenever a Plotly event fires in the browser.

Click a data point in the chart below, then evaluate the receive cell to see the event payload.

alias Plotly.{Figure, Scatter}
alias Plotly.Kino.PlotlyLive

chart =
  Figure.new()
  |> Figure.add_trace(Scatter.new(
    x: [1, 2, 3, 4, 5],
    y: [1, 4, 9, 16, 25],
    mode: "markers",
    marker: %{size: 15, color: "steelblue"},
    text: ["A", "B", "C", "D", "E"]
  ))
  |> Figure.update_layout(title: "Click any point — then run the next cell")
  |> PlotlyLive.new()

PlotlyLive.subscribe(chart, :click_data, :click)
chart

# Click a point above, then evaluate this cell
receive do
  {:click_data, event} ->
    IO.inspect(event, label: "click event", pretty: true)
after
  10_000 -> "No click within 10 s — click a point first, then re-run this cell"
end