我有一个闪亮的应用程序,允许我的用户浏览数据集。这个想法是用户探索数据集,以及用户发现他将通过电子邮件与他的客户分享的任何有趣的事情。我事先并不知道用户会发现多少有趣的东西。因此,在每个表或图表旁边,我有一个“将此项添加到报表中”按钮,该按钮隔离当前视图并将其添加到reactiveValues列表。
现在,我想做的是以下内容:
knitr 似乎与我想要的完全相反 - knitr允许我在静态文档中添加交互式闪亮组件,我想生成有光泽的HTML(也许使用knitr,I不知道)基于用户创建的静态值。
我在下面构建了一个最小的不工作示例,试图表明我想要做什么。它不起作用,仅用于演示目的。
ui = shinyUI(fluidPage(
title = "Report generator",
sidebarLayout(
sidebarPanel(textInput("numberinput","Add a number", value = 5),
actionButton("addthischart", "Add the current chart to the report")),
mainPanel(plotOutput("numberplot"),
htmlOutput("report"))
)
))
server = shinyServer(function(input, output, session){
#ensure I can plot
library(ggplot2)
#make a holder for my stored data
values = reactiveValues()
values$Report = list()
#generate the plot
myplot = reactive({
df = data.frame(x = 1:input$numberinput, y = (1:input$numberinput)^2)
p = ggplot(df, aes(x = x, y = y)) + geom_line()
return(p)
})
#display the plot
output$numberplot = renderPlot(myplot())
# when the user clicks a button, add the current plot to the report
observeEvent(input$addthischart,{
chart = isolate(myplot)
isolate(values$Report <- c(values$Report,list(chart)))
})
#make the report
myreport = eventReactive(input$addthischart,{
reporthtml = character()
if(length(values$Report)>0){
for(i in 1:length(values$Report)){
explanatorytext = tags$h3(paste(" Now please direct your attention to plot number",i,"\n"))
chart = values$Report[[i]]()
theplot = HTML(chart) # this does not work - this is the crux of my question - what should i do here?
reporthtml = c(reporthtml, explanatorytext, theplot)
# ideally, at this point, the output would be an HTML file that includes some header text, as well as a plot
# I made this example to show what I hoped would work. Clearly, it does not work. I'm asking for advice on an alternative approach.
}
}
return(reporthtml)
})
# display the report
output$report = renderUI({
myreport()
})
})
runApp(list(ui = ui, server = server))
答案 0 :(得分:0)
您可以使用html2canvas捕获页面的HTML,然后使用this答案将捕获的DOM部分保存为图像,这样您的客户端就可以将其嵌入到任何HTML文档中而无需担心关于页面内容的来源