No reuse of output elements?

[Norman Packard]

I have a header for use in each tab of a tabset, actually in each headerPanel of a pageWithSidebar within each tab.

I thought I could create a header with something like

output$header = renderUI({

...

  })

and call it with something like

headerPanel(uiOutput('header'),windowTitle="PDT")

for each of the headers in each of the tabs.

But... apparently this is not possible.  Apparently I cannot access uiOutput('header') multiple times.

If, however I define separate (identical) headers output$header1, output$header2, etc., I can access them with uiOutput('header1'), uiOutput('header2'), etc without a problem.

Seems crazy that I I have to repeat so much code with the multiple output$headers.  Probably I am not understanding something about the shiny relationship between R and javascript?

[Dean Attali]

I can understand why it's not possible to have multiple uiOutput('header'), because that literally creates an html tag with id header, and you can't have multiple tags with the same id.

I haven't tried this and it's not *ideal*, but would something like this work?

ui:

headerPanel(uiOutput('header1'), headerPanel(uiOutput('header2')

server:

commonHeader <- reactive({ ... })
output$header1 <- renderUI(commonHeader())
output$header2 <- renderUI(commonHeader())

That might not work at all, but it's the first thing I can think of

[Joe Cheng]

I think you might be better off with a navbarPage, which has a header argument where you can put common elements. 

Sent from Outlook

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[Dean Attali]

If you want the header to go above rather than inside each tab, then yes, what Joe said. I might have misunderstood the original question but I thought you purposely tried putting the header under rather than above the tab. But simplifying it to his suggestion might be worth it

---

http://deanattali.com

[Joe Cheng]

I'm saying to use navbarPage instead of tabs, sorry if that wasn't clear. 

Sent from Outlook

[jrdn...@gmail.com]

Yes, it can get very repetitive.  You can avoid rewriting most of the code by doing all the work in a reactive statement so that in the output statements you just need to call the reactive.