Since V0.2.0, shinyMobile has a function to preview your app in a large range of mobile devices: iphone X, iphone 8+, iphone8, iphone 5s, iphone 4s, ipad, Samsung galaxy S5, Samsung galaxy Note 8, … either locally on online:
library(shiny)
library(shinyMobile)
preview_mobile(appPath = system.file("examples/gallery/app.R", package = "shinyMobile"), device = "iphoneX")
preview_mobile(url = "https://dgranjon.shinyapps.io/miniUI2DemoMd", device = "ipadMini")The local preview is a 4 steps process:
preview_mobile with appPathR -e "shiny::runApp('appPath', port = 3838)" in a terminal
to launch the apppreview_mobile has other options such as color and
landscape (to preview in landscape mode).
shinyMobile introduces the pull to refresh feature. It
may be used to refresh the page content by pulling from top to bottom.
This feature is disabled by default but passing
pullToRefresh = TRUE in f7Page options will
activate it. On the server side, an input, namely input$ptr is TRUE when
ptr is refreshed and becomes NULL at the end of the animation. This
allows to trigger updates/computations on the server side, for
instance:
shinyApp(
ui = f7Page(
title = "My app",
options = list(pullToRefresh = TRUE),
f7SingleLayout(
navbar = f7Navbar(
title = "Single Layout",
hairline = FALSE,
shadow = TRUE
),
toolbar = f7Toolbar(
position = "bottom",
f7Link(label = "Link 1", href = "https://www.google.com"),
f7Link(label = "Link 2", href = "https://www.google.com")
),
# main content
f7List(
lapply(1:3, function(j) {
f7ListItem(
letters[j],
media = f7Icon("alarm_fill"),
right = "Right Text",
header = "Header",
footer = "Footer"
)
})
)
)
),
server = function(input, output, session) {
observe(print(input$ptr))
observeEvent(input$ptr, {
ptrStatus <- if (input$ptr) "on"
f7Dialog(
text = paste('ptr is', ptrStatus),
type = "alert"
)
})
}
)shinyMobile contains a set of useful functions to help you setting the layout as best as possible.
shinyMobile has a predefined input, namely input$deviceInfo:
shiny::shinyApp(
ui = f7Page(
title = "My app",
f7SingleLayout(
navbar = f7Navbar(
title = "Access device info",
hairline = FALSE,
shadow = TRUE
),
# main content
verbatimTextOutput("info")
)
),
server = function(input, output) {
output$info <- renderPrint({
input$deviceInfo
})
}
)The following fields are returned:
input$deviceInfo$os, returns a string containing your
OSinput$deviceInfo$desktop, TRUE or FALSE (if you are
running the app on your laptop or desktop)input$deviceInfo$standalone, TRUE or FALSE (standalone,
namely whether you access the app like a native app)input$deviceInfo$webview, TRUE or FALSE (webview)input$deviceInfo$electron, TRUE or FALSE
(electron)There are other fields, with less inportance:
input$deviceInfo$ios, TRUE or FALSE (if you are running
under iOS)input$deviceInfo$android, TRUE or FALSE (if you are
running under android)input$deviceInfo$androidChrome, TRUE or FALSE (if you
are running under android with Chrome)input$deviceInfo$iphone, TRUE or FALSE (if you have an
iphone)input$deviceInfo$ipod, TRUE or FALSE (if you have an
ipod)input$deviceInfo$ipad, TRUE or FALSE (if you have an
ipad)input$deviceInfo$edge, TRUE or FALSE (if you are using
edge)input$deviceInfo$ie, TRUE or FALSE (if you are using
Internet Explorer)input$deviceInfo$firefox, TRUE or FALSE (if you are
using Firefox)input$deviceInfo$macos, TRUE or FALSE (if you have
macOS)input$deviceInfo$windows, TRUE or FALSE (if you have
Windows)input$deviceInfo$cordova, TRUE or FALSE (cordova)input$deviceInfo$phonegap, TRUE or FALSE
(phonegap)Below the example displays a card only when the app is on desktop.
shinyApp(
ui = f7Page(
title = "My app",
f7SingleLayout(
navbar = f7Navbar(
title = "Access device info",
hairline = FALSE,
shadow = TRUE
),
# main content
uiOutput("card"),
textOutput("userAgent"),
)
),
server = function(input, output) {
output$userAgent <- renderText(input$deviceInfo$desktop)
# generate a card only for desktop
output$card <- renderUI({
if (input$deviceInfo$desktop) {
f7Card(
"This is a simple card with plain text,
but cards can also contain their own header,
footer, list view, image, or any other element."
)
}
})
}
)shinyMobile has input$lastInputChanged
which returns the name, value and type of the last changed input, see
below:
shinyApp(
ui = f7Page(
title = "My app",
f7SingleLayout(
navbar = f7Navbar(
title = "Single Layout",
hairline = FALSE,
shadow = TRUE
),
toolbar = f7Toolbar(
position = "bottom",
f7Link(label = "Link 1", href = "https://www.google.com"),
f7Link(label = "Link 2", href = "https://www.google.com")
),
# main content
f7Card(verbatimTextOutput("infos")),
f7Card(
f7Text(inputId = "text", label = "Text"),
f7Slider(inputId = "range1", label = "Range", min = 0, max = 2, value = 1, step = 0.1),
f7Stepper(inputId = "stepper1", label = "Stepper", min = 0, max = 10, value = 5),
verbatimTextOutput("lastChanged")
)
)
),
server = function(input, output) {
output$infos <- renderPrint(input$shinyInfo)
output$lastChanged <- renderPrint(input$lastInputChanged)
}
)This is convenient since usually, there is no shortcut to get the last changed value and this needs to be done server side in shiny.
Soon there will be a way to compare initial input values (frozen) to current input values and get a diff.