r - 在闪亮的 R 中使用 JS 事件函数两次来创建下拉菜单

Question

我正在构建一个闪亮的应用程序，我想要完成的一件事是创建一个下拉菜单。我想将劳动变量绘制为不同级别的年份变量的函数。请参阅下面的示例数据框：

  year level_2 level_3 level_4 labour
1  2013      10     101    1011      1
2  2014      10     101    1011      5
3  2015      10     101    1011     10
4  2016      10     101    1011     20
5  2017      10     101    1011     25
6  2013      11     111    1111      5
7  2014      11     111    1111     10
8  2015      11     111    1111     20
9  2016      11     111    1111     25
10 2017      11     111    1111     30
11 2013      10     102    1021      2
12 2014      10     102    1021      6
13 2015      10     102    1021     11
14 2016      10     102    1021     21
15 2017      10     102    1021     26
16 2013      11     112    1122      6
17 2014      11     112    1122     11
18 2015      11     112    1122     21
19 2016      11     112    1122     26
20 2017      11     112    1122     31

我已经知道如何获得第一个下拉菜单（通过单击图表 1 level_2 中的特定 ime 系列生成带有 level_3 的图表 2）。但是，我想通过单击第二个高图表中的特定时间序列（将输入第三个图表/level_4）来执行类似的操作。

但是，我有点卡住了。我正在构建一个 webapp 通过单击第二个图表的时间序列，应该会出现第三个图表。我设法做到了这一点，但是当第三个图表生成时第二个图表消失了。我认为这与 clickevent 函数覆盖第一个这一事实有关input$canvasClicked[[1]]，但我没有设法通过 a) 索引input$canvasClicked[[2]]或 b) 创建第二个来获得正确的结果JS("function(event) { ... }")。

任何帮助，将不胜感激！可以在下面找到简化应用程序的示例代码。

library(shiny)
library(dplyr)
library(highcharter)

ui <- shinyUI(
  fluidPage(
    column(width = 4, highchartOutput("hcontainer", height = "500px")),
    column(width = 4, highchartOutput("hcontainer2", height = "500px")),
    column(width = 4, highchartOutput("hcontainer3", height = "500px")) #added add highcharter output
  )
)

server <- function(input, output, session) { 

  df <- data.frame(year = c(rep(c(2013, 2014, 2015, 2016, 2017), 4)),
                   level_2 = c(rep(c(10, 10, 10, 10, 10, 11, 11, 11, 11, 11),2)),
                   level_3 = c(101, 101, 101, 101, 101, 111, 111, 111, 111, 111,
                               102, 102, 102, 102, 102, 112, 112, 112, 112, 112),
                   level_4 = c(c(1011, 1011, 1011, 1011, 1011, 1111, 1111, 1111, 1111, 1111,
                                 1021, 1021, 1021, 1021, 1021, 1122, 1122, 1122, 1122, 1122)), # additional level added
                   labour = c(1, 5, 10, 20, 25, 5, 10, 20, 25, 30,
                              2, 6, 11, 21, 26, 6, 11, 21, 26, 31))

  output$hcontainer <- renderHighchart({ 

    temp <- df %>% 
      group_by(year, level_2) %>% 
      summarize(Sum = sum(labour)) %>% 
      arrange(level_2) 

    hchart(temp, "line", hcaes(x = year, y = Sum, group = level_2)) %>%
      hc_plotOptions(series = list(events = list(click = canvasClickFunction)))

  })

  canvasClickFunction <- JS("function(event) {Shiny.onInputChange('canvasClicked', [this.name, event.point.category]);}")


  #second highcharter which should appear when user clicked on the serie named 10
  output$hcontainer2 <- renderHighchart({ 
    req(input$canvasClicked[[1]])
    temp2 <- df %>% 
      filter(level_2 == input$canvasClicked[[1]]) %>% # filter selected by click
      group_by(year, level_3) %>% 
      summarize(Sum = sum(labour)) %>% 
      arrange(level_3)

    hchart(temp2, "line", hcaes(x = year, y = Sum, group = level_3)) %>%
      hc_title(text = paste0("I clicked ",input$canvasClicked[[1]])) %>% 
      hc_plotOptions(series = list(events = list(click = canvasClickFunction2)))

  })

  canvasClickFunction2 <- JS("function(event) {Shiny.onInputChange('canvasClicked2', [this.name, event.point.category]);}")

    output$hcontainer3 <- renderHighchart({ 
    req(input$canvasClicked2[[1]])

        temp3 <- df %>%
          filter(level_3 == input$canvasClicked2[[1]]) %>% # filter selected by click
          group_by(year, level_4) %>%
          summarize(Sum = sum(labour)) %>%
          arrange(level_4)

        hchart(temp3, "line", hcaes(x = year, y = Sum, group = level_4)) %>% 
          hc_title(text = paste0("I clicked ",input$canvasClicked2[[1]])) #%>%
    })

} 


shinyApp(ui = ui, server = server)

标签： rhighchartsshinyshinyjs

Answer 1

感谢猪排，该应用程序正在运行。我需要更改canvasClicked新的部分JS("function(event) { ... }")以使应用程序正常工作。示例代码现在如下所示：

library(shiny)
library(dplyr)
library(highcharter)

ui <- shinyUI(
  fluidPage(
    column(width = 4, highchartOutput("hcontainer", height = "500px")),
    column(width = 4, highchartOutput("hcontainer2", height = "500px")),
    column(width = 4, highchartOutput("hcontainer3", height = "500px")) #added add highcharter output
  )
)

server <- function(input, output, session) { 

  df <- data.frame(year = c(rep(c(2013, 2014, 2015, 2016, 2017), 4)),
                   level_2 = c(rep(c(10, 10, 10, 10, 10, 11, 11, 11, 11, 11),2)),
                   level_3 = c(101, 101, 101, 101, 101, 111, 111, 111, 111, 111,
                               102, 102, 102, 102, 102, 112, 112, 112, 112, 112),
                   level_4 = c(c(1011, 1011, 1011, 1011, 1011, 1111, 1111, 1111, 1111, 1111,
                                 1021, 1021, 1021, 1021, 1021, 1122, 1122, 1122, 1122, 1122)), # additional level added
                   labour = c(1, 5, 10, 20, 25, 5, 10, 20, 25, 30,
                              2, 6, 11, 21, 26, 6, 11, 21, 26, 31))

  output$hcontainer <- renderHighchart({ 

    temp <- df %>% 
      group_by(year, level_2) %>% 
      summarize(Sum = sum(labour)) %>% 
      arrange(level_2) 

    hchart(temp, "line", hcaes(x = year, y = Sum, group = level_2)) %>%
      hc_plotOptions(series = list(events = list(click = canvasClickFunction)))

  })

  canvasClickFunction <- JS("function(event) {Shiny.onInputChange('canvasClicked', [this.name, event.point.category]);}")


  #second highcharter which should appear when user clicked on the serie named 10
  output$hcontainer2 <- renderHighchart({ 
    req(input$canvasClicked[[1]])
    temp2 <- df %>% 
      filter(level_2 == input$canvasClicked[[1]]) %>% # filter selected by click
      group_by(year, level_3) %>% 
      summarize(Sum = sum(labour)) %>% 
      arrange(level_3)

    hchart(temp2, "line", hcaes(x = year, y = Sum, group = level_3)) %>%
      hc_title(text = paste0("I clicked ",input$canvasClicked[[1]])) %>% 
      hc_plotOptions(series = list(events = list(click = canvasClickFunction2)))

  })

  canvasClickFunction2 <- JS("function(event) {Shiny.onInputChange('canvasClicked2', [this.name, event.point.category]);}")

    output$hcontainer3 <- renderHighchart({ 
    req(input$canvasClicked2[[1]])

        temp3 <- df %>%
          filter(level_3 == input$canvasClicked2[[1]]) %>% # filter selected by click
          group_by(year, level_4) %>%
          summarize(Sum = sum(labour)) %>%
          arrange(level_4)

        hchart(temp3, "line", hcaes(x = year, y = Sum, group = level_4)) %>% 
          hc_title(text = paste0("I clicked ",input$canvasClicked2[[1]])) #%>%
    })

} 


shinyApp(ui = ui, server = server)

一旦我能够（两天后），我将接受答案以供参考。