R - Shiny - 如何将整个选项卡面板导出到 png/pdf/excel？

Question

我创建了一个仪表板（带有 shinyUI/shinydashboard 包），它有一个使用 GT 包设计的表格。

我正在尝试将整个面板/格式化表格导出为 pdf/image/（excel 中的数据），但不知道该怎么做。

有什么方法可以达到我的要求吗？

我在下面提到了我正在使用的脚本的简化版本。

谢谢...

脚本：

TableA = data.frame(Product = c('iPhone', 'Macbook', 'Airpod', 'Macbook', 'Airpod', 'Macbook', 'iPhone'), East = c(1:7), West = c(5:11), North = c(15:21), South = c(24:30))

library(shiny)
library(shinythemes)
library(DT)
library(rhandsontable)
library(tidyverse)
library(tidyquant)
library(knitr)
library(gt)
library(shinycssloaders)
library(shinydashboard)
library(shinyWidgets)

header = dashboardHeader(title = 'Shiny Dashboard', titleWidth = 400)

sidebar = dashboardSidebar()

body <- dashboardBody(uiOutput("mainpanel"))

ui = dashboardPage(header, sidebar, body)

############

server = function(input, output, session)
  
{
  
  output$mainpanel = renderUI({
      
      fluidRow(tabBox(width = 250, height = 100,
               tabPanel("Apple Sales", value = 'tab1', gt_output(outputId = "TableC")%>% withSpinner(color="#3483CA", type = 1, size = 2), downloadButton(outputId = "Downloadpng", label = "Download Png"))
      ))
    })
    
    
    TableB = as.data.frame(TableA) %>%
      
            gt() %>%
            
            grand_summary_rows(columns = 2:5, fns = list(TotalSales = "sum")) %>%
            
            tab_options(grand_summary_row.background.color = "#DDEBF7") %>%
            
            cols_width(columns = 1 ~ px(1), columns = 2 ~ px(300), everything() ~ px(100)) %>%
            
            tab_spanner(label = "Sales", columns = 3:6)
      
    output$TableC = render_gt(expr = TableB)
  
  
  output$Downloadpng = downloadHandler(filename = "Apple Sales.png", 
  
          content = function(file)
              
            {
              png(file)
              with(tabPanel == 'tab1')
              dev.off()
            }
  )
  
}


############

shinyApp(ui = ui, server = server)

输出：

Answer 1

这可能是shinyscreenshot 包的一个很好的用例。您可以使用screenshotButton 函数并传递您想要图像的区域的id。

library(shinyscreenshot)

header = dashboardHeader(title = 'Shiny Dashboard', titleWidth = 400)

sidebar = dashboardSidebar()

body <- dashboardBody(uiOutput("mainpanel"))

ui = dashboardPage(header, sidebar, body)

############

server = function(input, output, session)
  
{
  
  output$mainpanel = renderUI({
    
    fluidRow(tabBox(width = 250, height = 100,
          tabPanel("Apple Sales", value = 'tab1',
            gt_output(outputId = "TableC")%>% 
              withSpinner(color="#3483CA", type = 1, size = 2), 
            
            screenshotButton(selector="#TableC", label = 'Download Png', filename = 'screenshot')
    )))
  })
  
  
  TableB = as.data.frame(TableA) %>%
    
    gt() %>%
    
    grand_summary_rows(columns = 2:5, fns = list(TotalSales = "sum")) %>%
    
    tab_options(grand_summary_row.background.color = "#DDEBF7") %>%
    
    cols_width(columns = 1 ~ px(1), columns = 2 ~ px(300), everything() ~ px(100)) %>%
    
    tab_spanner(label = "Sales", columns = 3:6)
  
  output$TableC = render_gt(expr = TableB)
  
}

shinyApp(ui = ui, server = server)

点击'Download PNG'按钮后会返回下图。