选择传单上的标记，从 DT 行单击，反之亦然

Question

下面的最小示例呈现具有 3 个市场的传单地图和具有 3 条记录的 DT 表。当地图上的一个市场被选中时，表格上的匹配记录也会被选中。但是，我不能做的是，也有相反的情况，表格上单击的行也会在地图上显示相关的弹出窗口。

我一直无法找到一个具有类似功能的示例 R 闪亮传单应用程序。

代码经过调整以反映最初的评论

library(shiny)
library(leaflet)
library(DT)
library(tidyverse)

# Define UI for application that draws a histogram
ui <- fluidPage(
   
    leafletOutput("opsMap"),
    DT::dataTableOutput('ranksDT')
)

# Define server logic required to draw a histogram
server <- function(input, output) {
   
    lats <- c(21.608889,21.693056, 24.04)
    longs <- c(-74.650833, -73.095,-74.341944)
    popups <- c('a','b','c')
    layerids <- c('a','b','c')
    iconNames <- c('cog','cog','cog')
    iconColors <- c('red','red','red')
    
    sampleData <- tibble(lats,longs, popups,layerids,iconNames,iconColors)

    score <- c(7,3,9)
    
    locationRanks <- tibble(popups, score)
        
    output$opsMap <- renderLeaflet({
        
        leaflet() %>%
            addTiles() %>% 
            addAwesomeMarkers(lat = sampleData$lats, 
                              lng = sampleData$longs, 
                              popup = sampleData$popups, 
                              layerId = sampleData$layerids,
                              icon = makeAwesomeIcon(icon=sampleData$iconNames, 
                                                     markerColor=sampleData$iconColors))
    })
    
    output$ranksDT <- DT::renderDataTable({
        d1 <- datatable(locationRanks,
                        selection = 'single',
                        rownames=FALSE,
                        options = list(dom = 'tpi',
                                       pageLength =5,
                                       paging=FALSE,
                                       searching=FALSE
                        )
        )
        d1
    })
    
    # create a reactive value that will store the click position
    mapClick <- reactiveValues(clickedMarker=NULL)
    mapClick <- reactiveValues(clickedGroup=NULL)
    
    # create a reactive for the DT  table
    locationClick <-reactiveValues(clickedRow = NULL)
    
    # observe click events
    observe({
        mapClick$clickedMarker <- paste(input$opsMap_marker_click$id)
        mapClick$clickedGroup <- paste(input$opsMap_marker_click$group)
        locationClick$clickedRow <- input$ranksDT_rows_selected
    })
    
    # define a proxy variable for the plant rank table
    proxy1 = dataTableProxy('ranksDT')
    # when map is clicked, make the same table row selection - need row number
    observeEvent(input$opsMap_marker_click$id, {
        a <- which(locationRanks[1] == input$opsMap_marker_click$id)
        proxy1 %>% selectRows(a)
    })
    
    
    proxy2 = leafletProxy('opsMap', session = shiny::getDefaultReactiveDomain())
    # if table is clicked, select the same market from the map
    observeEvent(locationClick$clickedRow, {
        a <- as.character(locationRanks[locationClick$clickedRow,1])
        cat(file=stderr(),"clicked row", locationClick$clickedRow, a,'\n')
        #proxy2 %>% opsMap_marker_click$id <- a
    })
    
    
}

# Run the application 
shinyApp(ui = ui, server = server)

Answer 1

一个解决方案是使用input$map01_marker_click$id一起dataTableProxy()，selectRows()并且selectPage()如果你想在数据表中的亮点行。

为了突出标记，我认为您可以使用一些 javascript 来模拟点击标记。但我也会采用更简单的方法来添加突出显示的标记并在之后将其删除。

基本上你的问题在这个问题中得到了部分回答：Shiny - 如何在数据表中选择记录时突出显示传单地图上的对象？剩下的部分在其中一个答案中。-> 归功于他们。由于代码很长，我努力将其简化为最小的可重现示例。

最小可重现示例：

library(shiny)
library(leaflet)
library(DT)

qDat <- quakes[1:10, ]
qDat$id <- seq.int(nrow(qDat))

ui <- fluidPage(
  mainPanel(
    leafletOutput('map01'),
    dataTableOutput('table01')
  )
)

server <- function(input,output){
  
  output$table01 <- renderDataTable({
    DT::datatable(qDat, selection = "single", options = list(stateSave = TRUE))
  })
  
  # to keep track of previously selected row
  prev_row <- reactiveVal()
  
  # new icon style
  highlight_icon = makeAwesomeIcon(icon = 'flag', markerColor = 'green', iconColor = 'white')
  
  observeEvent(input$table01_rows_selected, {
    row_selected = qDat[input$table01_rows_selected, ]
    proxy <- leafletProxy('map01')
    proxy %>%
      addAwesomeMarkers(popup = as.character(row_selected$mag),
                        layerId = as.character(row_selected$id),
                        lng = row_selected$long, 
                        lat = row_selected$lat,
                        icon = highlight_icon)
    
    # Reset previously selected marker
    if(!is.null(prev_row())){
      proxy %>%
        addMarkers(popup = as.character(prev_row()$mag), 
                   layerId = as.character(prev_row()$id),
                   lng = prev_row()$long, 
                   lat = prev_row()$lat)
    }
    # set new value to reactiveVal 
    prev_row(row_selected)
  })
  
  output$map01 <- renderLeaflet({
    leaflet(data = qDat) %>% 
      addTiles() %>%
      addMarkers(popup = ~as.character(mag), layerId = as.character(qDat$id)) 
  })
  
  observeEvent(input$map01_marker_click, {
    clickId <- input$map01_marker_click$id
    dataTableProxy("table01") %>%
      selectRows(which(qDat$id == clickId)) %>%
      selectPage(which(input$table01_rows_all == clickId) %/% input$table01_state$length + 1)
  })
}

shinyApp(ui = ui, server = server)