I want to be able to paste into selectizeInput to select multiple items at once. There are good solutions for this:
https://github.com/rstudio/shiny/issues/1663
The issue is that my list contains huge amounts of items, so the app will lag like crazy and sometimes crash. Setting maxOptions = 50 takes care of the lag, but pasting something that's not within the first 100 items, will only return "undefined", i.e., I can paste gene_1,gene_2,gene_3, but not gene_51,gene_52,gene_53 when all items are included.
Any ideas? Could you grep the list of items in the return function that would take some more time but not make the app lag like crazy?
genes <- paste0("gene_",1:50000)
ui = fluidPage(
selectizeInput("x", "Paste multiple genes:",
genes[1:100],
multiple = TRUE,
options = list(maxOptions = 50,
splitOn = I("(function() { return /[,;]/; })()"),
create = I("function(input, callback){
return {
value: input,
text: input
};
}")
)
),actionButton("button","update")
)
server<- function(input, output,session){
observeEvent(input$button,{
updateSelectizeInput(session,"x", "Paste multiple genes:",
genes,
server = TRUE,
options = list(maxOptions = 50,
splitOn = I("(function() { return /[,;]/; })()"),
create = I("function(input, callback){
return {
value: input,
text: input
};
}")
)
)
})
}
shinyApp(ui=ui, server = server)
I want to put the focus and edit the first cell of my dynamic table when the user clicks a button.
the problem is that the id of the table tag is dynamic. actually, the name I put in dtoutput is a div tag, which contains neither cell nor row to position with javascrpt.
The problem is that the identification of the html tag of the table is dynamic. Actually, the name that I put in dtoutput is a div tag, and therefore its javascrpt object does not contain a cell or a row to position.
I have tried to position myself in different ways:
# tablet_list_var_dtf.cell (': eq (0)'). node (). focus ();
# tablet_list_var_dtf.cell (': eq (1)', ': eq (0)') .focus ();
# tablet_list_var_dtf.cell (': eq (' + scrollStart + ')', ': eq (0)') .focus ();
but as I say, really 'tablet_list_var_dtf' is an HTMLDivElement object and therefore it does not have node, cell, row etc ... also I cannot directly use object.focus (), it does not work.
Not only do I want to put the focus, but I want to edit the first cell, force a doubleclick event on said cell ..
I put a summary and executable code of the problem
enter code here
library(shiny)
library(DT)
library(shinyjs)
library(shinyFeedback)
# JS refocus function
jscode <- "
shinyjs.refocus = function(e_id ) {
alert(e_id);
alert(eval(tablet_list_var_dtf));
tablet_list_var_dtf.datatable.row().focus();
var scrollStart = tablet_list_var_dtf.scroller.page().start;
alert('ppp:'+scrollStart);
}"
#tablet_list_var_dtf.cell(':eq(0)').node().focus();
#tablet_list_var_dtf.cell( ':eq(1)', ':eq(0)' ).focus();
#tablet_list_var_dtf.cell( ':eq(' + scrollStart + ')', ':eq(0)' ).focus();
#table.cell(':eq(0)').focus()
#shinyjs.refocus = function(e_id) {
#document.getElementById(e_id).focus();
ui <- fluidPage(
useShinyjs(),
extendShinyjs(text = jscode, functions = c("refocus") ),
# activate shiny feedback
box(wclass = "map",
width = 12,
style = 'padding:0px;',
title = "List of DTF",
uiOutput( ("list_var_dtf"))
) ,
actionButton( ('edit_name_var_dtf'),'edit name var description'),
)
server <- function(input, output, session){
observeEvent(input$edit_name_var_dtf, {
print("edit_name_var_dtf")
js$refocus("tablet_list_var_dtf")
print('js$refocus(table)')
})
output$list_var_dtf <- renderUI({
DTOutput(("tablet_list_var_dtf"))
})
output$tablet_list_var_dtf <- renderDT(
datatable( data = mtcars,
rownames = FALSE,
options = list(
orderClasses = TRUE,
order = list(1, "desc"),
scrollX = TRUE,
scrollY = "37vh",
searchHighlight = TRUE,
scrollCollapse = T,
dom = 'ft',
paging = FALSE,
#callback = JS(jscall),
initComplete = JS("function(settings, json) {",
"$(this.api().table().header()).css({'background-color': '#000', 'color': '#fff'});",
"}")
),
selection = "none" , editable = list(target = "column", disable = list(columns = c(1))))
)
}
shinyApp(ui, server)
This is the js code correct:
jscode <- " shinyjs.refocus = function(e_id){
var table = $('#DataTables_Table_0').DataTable();
var td = table.cell(':eq(0)', ':eq(0)').node();
$(td).attr('tabindex', 0); $(td).dblclick( );
}"
The problem is looking for the 'DataTables_Table_(XXX)' selector in a pivot table in shiny. So the real problem is finding the right selector for the table.
If our component id is 'table_list_var_dtf'
DTOutput('table_list_var_dtf')
you should know that this id is not really the id of the table. But the id of the div that contains the pivot table. Specifically, the table that is created dynamically starts with the name DataTables_Table_ (xxxxxx) . Where (xxxxxx) is the number of tables that have been created dynamically.
Thus, if there are only two tables on the page, the id to look for is: DataTables_Table_ 02
thankssss. jogugil...
With the Shiny selectizeInput widget, the user can type in text as well as select a value from a list of values. Is there a way in R to read the current value of the text?
(Added)
I should make it clear that I want to be able to read the text the user enters before he has made a selection. As zimia points out, after he has made a selection, the value of whatever he selected becomes available as input$input_id (assuming that the selectize input has the id "input_id").
you can just use the input$input_id. See below
ui <- fluidRow(
selectizeInput("input1","Enter Text",choices=c("A","B") ,options = list(create=TRUE)),
textOutput("output1")
)
server<- function(input, output, session){
output$output1 <- renderText({
req(input$input1)
input$input1
})
}
Shiny's selectizeInput still gives access to the internal properties, methods and callbacks of Selectize.js through "options" argument of updateSelectizeInput. Selectize.js exposes callback "onType", so you can use like that:
updateSelectizeInput(
session,
'input1',
options = list(
onType = I('
text => Shiny.setInputValue("input1_searchText", text)
'),
onBlur = I('
() => Shiny.setInputValue("input1_searchText", null)
')
)
)
and consume it with observer:
observeEvent(input$input1_searchText, {
print(input$input1_searchText)
}, ignoreNULL = FALSE
)
Please, note, that I was also interested to know when the select looses focus and hence used "onBlur" event to set the search text to NULL.
I was thinking that there would be a solution at the level of R/shiny. But I have found a solution that uses javascript.
library(shiny)
js <- '
$(document).on("keyup", function(e) {
minChars = 4;
tag1 = document.activeElement.getAttribute("id");
val1 = document.activeElement.value;
if (tag1 == "input1-selectized") {
if (Math.sign(val1.length +1 - minChars) == 1) {
obj = { "val": val1 };
Shiny.onInputChange("valueEntered", obj);
}
}
});
'
ui <- fluidRow(
tags$script(js),
selectizeInput(
"input1",
"Enter text",
choices = c("A", "B"),
options = list(create = FALSE)),
textOutput("output1")
)
server <- function(input, output, session) {
output$output1 <- renderText({
req(input$valueEntered$val)
input$valueEntered$val
})
}
shinyApp(ui = ui, server = server)
The javascript looks for text entered into the element with id "input1-selectized", and if the value is length 4 or more, sets the shiny variable "valueEntered" to an object with val = the text.
Then the observeEvent uses the shiny variable input$valueEntered to set the output text.
The reason in the javascript for using the Math.sign function rather than >, and the reason for nested if's is because for some reason, Shiny replaces infix operators such as > and && by their html equivalents, > and &&.
Note that if the selectizeInput widget has id "input1", then the corresponding text field has id "input1-selectized".
I want to fetch cookie data from my Shiny app using shinyjs. I have created a cookie, "samplecookie=testval"; and I want to be able to retrieve the value of samplecookie. I use the below javascript function (where I pass the cookieName and it returns the corresponding value).
function fetchCookie(name) {
var nameEQ = name + "=";
var ca = document.cookie.split(";");
for(var i=0;i < ca.length;i++) {
var c = ca[i];
while (c.charAt(0)==" ") c = c.substring(1,c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
}
return "No such cookie";
Below is the javascript code in the shiny app
jsCode<-'shinyjs.tstfunc=
function (name) {
var nameEQ = name + "=";
var ca = document.cookie.split(";");
for(var i=0;i < ca.length;i++) {
var c = ca[i];
while (c.charAt(0)==" ") c = c.substring(1,c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
return "No such cookie";
}
}'
ui <- shinyUI(fluidPage(mainPanel(
useShinyjs(),
extendShinyjs(text = jsCode)
)))
server <- function(input, output)
{
observe({
x=js$tstfunc("samplecookie")
print(x)
})
}
shinyApp(ui=ui, server=server)
I am expecting that when I pass "samplecookie" as a parameter to the tstfunc() function, it should print "testval" on the console. But every time I keep getting a NULL value returned. Can someone help me understand what I am doing wrong? Appreciate any help. Thanks.
I'm the author of shinyjs. You cannot use it like that to pass values from JS to R. The only way to pass a value from JS to R is to use inputs. In JavaScript you'd have to call the Shiny.onInputChange() function, and in R you need to add an observe/reactive statement that listens to that input being changed.
Read this page to learn about passing values from JS to R
The code you provide is a bit weird and hard to read so here's a simple example of how to do this. This code simply asks JavaScript to pass the current time to R, it's simple but it shows how to do this
library(shiny)
library(shinyjs)
jsCode <- 'shinyjs.gettime = function(params) {
var time = Date();
Shiny.onInputChange("jstime", time);
}'
ui <- fluidPage(
useShinyjs(),
extendShinyjs(text = jsCode, functions = "gettime")
)
server <- function(input, output) {
js$gettime()
observe({
cat(input$jstime)
})
}
shinyApp(ui = ui, server = server)
I would like to have a shiny website that keeps the dynamic choices in the URL as output, so you can copy and share the URL.
I took this code as an example:
https://gist.github.com/amackey/6841cf03e54d021175f0
And modified it to my case, which is a webpage with a navbarPage and multiple tabs per element in the bar.
What I would like is the URL to direct the user to the right element
in the first level tabPanel, and the right tab in the second level
tabPanel.
This is, if the user has navigated to "Delta Foxtrot" and then to
"Hotel", then changed the parameters to
#beverage=Tea;milk=TRUE;sugarLumps=3;customer=mycustomer, I would
like the URL to send the user to "Delta Foxtrot" -> "Hotel", instead
of starting at the first tab of the first panel element.
Ideally I would like a working example, since everything I tried so far hasn't worked.
Any ideas?
# ui.R
library(shiny)
hashProxy <- function(inputoutputID) {
div(id=inputoutputID,class=inputoutputID,tag("div",""));
}
# Define UI for shiny d3 chatter application
shinyUI(navbarPage('URLtests', id="page", collapsable=TRUE, inverse=FALSE,
tabPanel("Alfa Bravo",
tabsetPanel(
tabPanel("Charlie",
tags$p("Nothing to see here. Everything is in the 'Delta Foxtrot' 'Hotel' tab")
)
)
)
,tabPanel("Delta Foxtrot",
tabsetPanel(
tabPanel("Golf",
tags$p("Nothing to see here. Everything is in the 'Delta Foxtrot' 'Hotel' tab")
)
,tabPanel("Hotel",
tags$p("This widget is a demonstration of how to preserve input state across sessions, using the URL hash."),
selectInput("beverage", "Choose a beverage:",
choices = c("Tea", "Coffee", "Cocoa")),
checkboxInput("milk", "Milk"),
sliderInput("sugarLumps", "Sugar Lumps:",
min=0, max=10, value=3),
textInput("customer", "Your Name:"),
includeHTML("URL.js"),
h3(textOutput("order")),
hashProxy("hash")
)
)
)
))
# server.R
library(shiny)
url_fields_to_sync <- c("beverage","milk","sugarLumps","customer");
# Define server logic required to respond to d3 requests
shinyServer(function(input, output, clientData) {
# Generate a plot of the requested variable against mpg and only
# include outliers if requested
output$order <- reactiveText(function() {
paste(input$beverage,
if(input$milk) "with milk" else ", black",
"and",
if (input$sugarLumps == 0) "no" else input$sugarLumps,
"sugar lumps",
"for",
if (input$customer == "") "next customer" else input$customer)
})
firstTime <- TRUE
output$hash <- reactiveText(function() {
newHash = paste(collapse=";",
Map(function(field) {
paste(sep="=",
field,
input[[field]])
},
url_fields_to_sync))
# the VERY FIRST time we pass the input hash up.
return(
if (!firstTime) {
newHash
} else {
if (is.null(input$hash)) {
NULL
} else {
firstTime<<-F;
isolate(input$hash)
}
}
)
})
})
# URL.js
<script type="text/javascript">
(function(){
this.countValue=0;
var changeInputsFromHash = function(newHash) {
// get hash OUTPUT
var hashVal = $(newHash).data().shinyInputBinding.getValue($(newHash))
if (hashVal == "") return
// get values encoded in hash
var keyVals = hashVal.substring(1).split(";").map(function(x){return x.split("=")})
// find input bindings corresponding to them
keyVals.map(function(x) {
var el=$("#"+x[0])
if (el.length > 0 && el.val() != x[1]) {
console.log("Attempting to update input " + x[0] + " with value " + x[1]);
if (el.attr("type") == "checkbox") {
el.prop('checked',x[1]=="TRUE")
el.change()
} else if(el.attr("type") == "radio") {
console.log("I don't know how to update radios")
} else if(el.attr("type") == "slider") {
// This case should be setValue but it's not implemented in shiny
el.slider("value",x[1])
//el.change()
} else {
el.data().shinyInputBinding.setValue(el[0],x[1])
el.change()
}
}
})
}
var HashOutputBinding = new Shiny.OutputBinding();
$.extend(HashOutputBinding, {
find: function(scope) {
return $(scope).find(".hash");
},
renderError: function(el,error) {
console.log("Shiny app failed to calculate new hash");
},
renderValue: function(el,data) {
console.log("Updated hash");
document.location.hash=data;
changeInputsFromHash(el);
}
});
Shiny.outputBindings.register(HashOutputBinding);
var HashInputBinding = new Shiny.InputBinding();
$.extend(HashInputBinding, {
find: function(scope) {
return $(scope).find(".hash");
},
getValue: function(el) {
return document.location.hash;
},
subscribe: function(el, callback) {
window.addEventListener("hashchange",
function(e) {
changeInputsFromHash(el);
callback();
}
, false);
}
});
Shiny.inputBindings.register(HashInputBinding);
})()
</script>
EDITED: I ran the example code in the answer, but couldn't get it to work. See screenshot.
UPDATE
Shiny .14 now available on CRAN supports saving app state in a URL. See this article
This answer is a more in-depth answer than my first that uses the entire sample code provided by OP. I've decided to add it as a new answer in light of the bounty. My original answer used a simplified version of this so that someone else coming to the answer wouldn't have to read through any extraneous code to find what they're looking for. Hopefully, this extended version will clear up any difficulties you're having. Parts I've added to your R code are surrounded with ### ... ###.
server.r
# server.R
library(shiny)
url_fields_to_sync <- c("beverage","milk","sugarLumps","customer");
# Define server logic required to respond to d3 requests
shinyServer(function(input, output, session) { # session is the common name for this variable, not clientData
# Generate a plot of the requested variable against mpg and only
# include outliers if requested
output$order <- reactiveText(function() {
paste(input$beverage,
if(input$milk) "with milk" else ", black",
"and",
if (input$sugarLumps == 0) "no" else input$sugarLumps,
"sugar lumps",
"for",
if (input$customer == "") "next customer" else input$customer)
})
firstTime <- TRUE
output$hash <- reactiveText(function() {
newHash = paste(collapse=";",
Map(function(field) {
paste(sep="=",
field,
input[[field]])
},
url_fields_to_sync))
# the VERY FIRST time we pass the input hash up.
return(
if (!firstTime) {
newHash
} else {
if (is.null(input$hash)) {
NULL
} else {
firstTime<<-F;
isolate(input$hash)
}
}
)
})
###
# whenever your input values change, including the navbar and tabpanels, send
# a message to the client to update the URL with the input variables.
# setURL is defined in url_handler.js
observe({
reactlist <- reactiveValuesToList(input)
reactvals <- grep("^ss-|^shiny-", names(reactlist), value=TRUE, invert=TRUE) # strip shiny related URL parameters
reactstr <- lapply(reactlist[reactvals], as.character) # handle conversion of special data types
session$sendCustomMessage(type='setURL', reactstr)
})
observe({ # this observer executes once, when the page loads
# data is a list when an entry for each variable specified
# in the URL. We'll assume the possibility of the following
# variables, which may or may not be present:
# nav= The navbar tab desired (either Alfa Bravo or Delta Foxtrot)
# tab= The desired tab within the specified nav bar tab, e.g., Golf or Hotel
# beverage= The desired beverage selection
# sugar= The desired number of sugar lumps
#
# If any of these variables aren't specified, they won't be used, and
# the tabs and inputs will remain at their default value.
data <- parseQueryString(session$clientData$url_search)
# the navbar tab and tabpanel variables are two variables
# we have to pass to the client for the update to take place
# if nav is defined, send a message to the client to set the nav tab
if (! is.null(data$page)) {
session$sendCustomMessage(type='setNavbar', data)
}
# if the tab variable is defined, send a message to client to update the tab
if (any(sapply(data[c('alfa_bravo_tabs', 'delta_foxtrot_tabs')], Negate(is.null)))) {
session$sendCustomMessage(type='setTab', data)
}
# the rest of the variables can be set with shiny's update* methods
if (! is.null(data$beverage)) { # if a variable isn't specified, it will be NULL
updateSelectInput(session, 'beverage', selected=data$beverage)
}
if (! is.null(data$sugarLumps)) {
sugar <- as.numeric(data$sugarLumps) # variables come in as character, update to numeric
updateNumericInput(session, 'sugarLumps', value=sugar)
}
})
###
})
ui.r
library(shiny)
hashProxy <- function(inputoutputID) {
div(id=inputoutputID,class=inputoutputID,tag("div",""));
}
# Define UI for shiny d3 chatter application
shinyUI(navbarPage('URLtests', id="page", collapsable=TRUE, inverse=FALSE,
tabPanel("Alfa Bravo",
tabsetPanel(
###
id='alfa_bravo_tabs', # you need to set an ID for your tabpanels
###
tabPanel("Charlie",
tags$p("Nothing to see here. Everything is in the 'Delta Foxtrot' 'Hotel' tab")
)
)
)
,tabPanel("Delta Foxtrot",
tabsetPanel(
###
id='delta_foxtrot_tabs', # you need to set an ID for your tabpanels
###
tabPanel("Golf",
tags$p("Nothing to see here. Everything is in the 'Delta Foxtrot' 'Hotel' tab")
)
,tabPanel("Hotel", id='hotel',
tags$p("This widget is a demonstration of how to preserve input state across sessions, using the URL hash."),
selectInput("beverage", "Choose a beverage:",
choices = c("Tea", "Coffee", "Cocoa")),
checkboxInput("milk", "Milk"),
sliderInput("sugarLumps", "Sugar Lumps:",
min=0, max=10, value=3),
textInput("customer", "Your Name:"),
#includeHTML("URL.js"),
###
includeHTML('url_handler.js'), # include the new script
###
h3(textOutput("order")),
hashProxy("hash")
)
)
)
))
url_handler.js
<script>
Shiny.addCustomMessageHandler('setNavbar',
function(data) {
// create a reference to the desired navbar tab. page is the
// id of the navbarPage. a:contains says look for
// the subelement that contains the contents of data.nav
var nav_ref = '#page a:contains(\"' + data.page + '\")';
$(nav_ref).tab('show');
}
)
Shiny.addCustomMessageHandler('setTab',
function(data) {
// pick the right tabpanel ID based on the value of data.nav
if (data.page == 'Alfa Bravo') {
var tabpanel_id = 'alfa_bravo_tabs';
} else {
var tabpanel_id = 'delta_foxtrot_tabs';
}
// combine this with a reference to the desired tab itself.
var tab_ref = '#' + tabpanel_id + ' a:contains(\"' + data[tabpanel_id] + '\")';
$(tab_ref).tab('show');
}
)
Shiny.addCustomMessageHandler('setURL',
function(data) {
// make each key and value URL safe (replacing spaces, etc.), then join
// them and put them in the URL
var search_terms = [];
for (var key in data) {
search_terms.push(encodeURIComponent(key) + '=' + encodeURIComponent(data[key]));
}
window.history.pushState('object or string', 'Title', '/?' + search_terms.join('&'));
}
);
</script>
To test this, call runApp(port=5678) in the directory with your source files. By default, no parameters are specified in the URL, so this will default to the first navbar item and the first tab within that item. To test it with URL parameters, point your browser to: http://127.0.0.1:5678/?nav=Delta%20Foxtrot&tab=Hotel&beverage=Coffee. This should point you to the second navbar tab and the second tab in that navbar item with coffee as the selected beverage.
Here's an example demonstrating how to update the navbar selection, tabset selection, and widget selection using variables defined in the URL
ui <- navbarPage('TEST', id='page', collapsable=TRUE, inverse=FALSE,
# define a message handler that will receive the variables on the client side
# from the server and update the page accordingly.
tags$head(tags$script("
Shiny.addCustomMessageHandler('updateSelections',
function(data) {
var nav_ref = '#page a:contains(\"' + data.nav + '\")';
var tabpanel_id = data.nav == 'Alpha' ? '#alpha_tabs' : '#beta_tabs';
var tab_ref = tabpanel_id + ' a:contains(\"' + data.tab + '\")';
$(nav_ref).tab('show');
$(tab_ref).tab('show');
}
)
")),
tabPanel('Alpha',
tabsetPanel(id='alpha_tabs',
tabPanel('Tab')
)
),
tabPanel('Beta',
tabsetPanel(id='beta_tabs',
tabPanel('Golf'),
tabPanel('Hotel',
selectInput("beverage", "Choose a beverage:", choices = c("Tea", "Coffee", "Cocoa"))
)
)
)
)
server <- function(input, output, session) {
observe({
data <- parseQueryString(session$clientData$url_search)
session$sendCustomMessage(type='updateSelections', data)
updateSelectInput(session, 'beverage', selected=data$beverage)
})
}
runApp(list(ui=ui, server=server), port=5678, launch.browser=FALSE)
Point your browser to this URL after starting the app: http://127.0.0.1:5678/?nav=Beta&tab=Hotel&beverage=Coffee