`selectedpoints` does not function properly when a vector is passed using `plotlyProxy` & `"restyle"`.

Beginne damit, das mitgelieferte reproduzierbare R Shiny-Beispiel auszuführen, und vergleiche plotlyProxyInvoke mit selected_rows, die c(1) enthalten, mit c(1, 1). Verfolge die Aktualisierung von selectedpoints durch den plotlyProxy-"restyle"-Aufruf; abgeschlossen ist die Aufgabe, wenn ein Vektor mit einem einzelnen Wert den Punkt ohne Duplizierung auswählt.

Bug/Unexpected Behavior

When updating a scatter plot's selectedpoints in a Shiny server using "restyle" on a plotlyProxy, single value vectors don't update the graph. E.g., passing c(1) to selectedpoints won't update the graph.

However, if we duplicate this value, e.g., c(1, 1) and pass it to selectedpoints, the 1 point will be selected.

Reproducible example:

# selected points single value incorrect behavior
library(shiny)

ui <- fluidPage(fluidRow(plotly::plotlyOutput("graph"),
                         DT::DTOutput("table")))

server <- function(input, output, session) {
  output$table <- DT::renderDT({
    cars
  })
  
  output$graph <- plotly::renderPlotly({
    plotly::plot_ly(
      cars,
      x = ~ speed,
      y = ~ dist,
      selected = list(marker = list(color = "red")),
      type = "scatter",
      mode = "markers",
      source = "graph"
    ) %>%
      plotly::layout(dragmode = "select",
                     clickmode = "event+select") %>%
      plotly::event_register("plotly_selected")
  })
  
  plot_proxy <- plotly::plotlyProxy("graph")
  table_proxy <- DT::dataTableProxy("table")
  
  selected <-
    reactive({
      plotly::event_data("plotly_selected", source = "graph")
    })
  
  observeEvent(selected(), {
    selected <- selected()$pointNumber + 1
    table_proxy %>% DT::selectRows(selected)
  })
  
  observeEvent(input$table_cell_clicked, {
    selected_rows <- input$table_rows_selected - 1

   #### comment this conditional to see the bug ####
    if (length(selected_rows) == 1) {
      selected_rows <- rep(selected_rows, 2)
    }
   #### end comment this conditional to see the bug ####

   plotly::plotlyProxyInvoke(
      plotly::plotlyProxy("graph", session),
      "restyle",
      list(selectedpoints = list(selected_rows)),
      0
    )
  })
  
}

shinyApp(ui, server)