FR: communicating click events; or generalisable click functions? about d3treer HOT 7 CLOSED

in 1f37d1d, I start to add the Shiny integration, by returning the celltext/likely name of the clicked cell. Here is a basic example.

library(shiny)
library(treemap)
library(d3treeR)

data(business)
tm <- treemap(business,
              index=c("NACE1", "NACE2","NACE3"),
              vSize="employees",
              fontsize.labels=12,
              lowerbound.cex.labels=1, draw = F)

ui <- list(
  d3tree2Output( 'tree' )
  ,textOutput( "clickedinfo", container = p )
)

server <- function( input, output, session ){
  output$tree <- renderD3tree2({
    d3tree2( tm )
  })

  # from https://github.com/rstudio/leaflet/blob/master/inst/examples/shiny.R
  v <- reactiveValues(msg = "")

  observeEvent(input$tree_click, {
    v$msg <- paste("Clicked ", input$tree_click$name)
  })

  output$clickedinfo <- renderText(v$msg)
}

shinyApp( ui, server )

I'll start experimenting with the second part of the request which is a generalizable click handler that could trigger actions on the JavaScript side.

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@ellisp ad0d8b0 should provide a first implementation of clickAction for d3tree2. I opted for what I considered the easier but much more limited form of the implementation. If I can broaden my assumption that someone providing clickAction understands JavaScript call/this, then I could use the more powerful form where I call the clickAction with d which is all the node info, g which is the SVG element, and el which is the htmlwidget element. In this case function(){return this} would give us an object {d:...,g:...,el:...}

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brilliant, I'll have a look some time this week

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This is great and gets me most of the way where I was hoping, except that when you get to the end of the hierarchy and click on one of the twigs of the tree it doesn't register. It doesn't need to for treemap-drawing purposes as it's already got the most granular graphic up there, but it would be good to have that final twig known to the app when it's clicked on.

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Oh I missed that. I should be able to push that out tonight. Thanks.

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I think I got it right in 3f30077. The examples provided above now communicate click/selection on the top grandparent level (title bar), parent level, and at the cell level including the leaves. If possible, please test on your end.

It is still not the most elegant solution, but I'll probably leave it as is for now.

Thanks again.

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Tested at my end and it does the job, thanks.

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