Develop Reference

In R/Shiny forcing to re-render the plot after clicking the menuItem

This is my code.
My question is: Is it possible to make shiny update/refresh the chart displayed in item 3 panel (Menu Item 3) once I click on it? I know that I could use a button, for example. But I need to click on Item 3 and force the page to refresh once I click.
I was wondering if observeEvent would do this for me.
library("shiny")
library("shinyWidgets")
library("gapminder")
hc_data_1 <- gapminder %>% filter(country == 'Chile')
ui <- dashboardPage(dark = FALSE,fullscreen = TRUE,
dashboardHeader(title = h4("Title")),
dashboardSidebar(skin = 'light',
sidebarMenu( id = "sidebarMenu",
menuItem(text = "Item 1",
tabName = "panel_1"),
menuItem(text = "Item 2",
tabName = "panel_2"),
menuItem(text = "Item 3",
tabName = "panel_3") )
),
dashboardBody(
tabItems(
tabItem(tabName = 'panel_1',
tabPanel("Panel 1")),
tabItem(tabName = 'panel_2',
tabPanel("Panel 2")),
tabItem(tabName = 'panel_3',
tabPanel("Panel 3",
htmlOutput('chart_1',width = '100px')
))
)
))
server <- function(input, output, session) {
output$chart_1<- renderUI({
hc_data_1 %>%
hchart(
"line",
hcaes(x = year, y = pop),
showInLegend = TRUE,
color = "#63696b",
name = "chile-argentina"
)
})
}
shinyApp(ui = ui, server = server)

I am not sure if I understand the "force the page to refresh"-part correctly. If this is referring to the same function as a browser reloading its page please check the following:
library("shiny")
library("shinyWidgets")
library("gapminder")
library("dplyr")
library("bs4Dash")
library("highcharter")
hc_data_1 <- gapminder %>% filter(country == 'Chile')
ui <- bs4Dash::dashboardPage(
dark = FALSE,
fullscreen = TRUE,
dashboardHeader(title = h4("Title")),
dashboardSidebar(
skin = 'light',
sidebarMenu(
id = "sidebarMenu",
menuItem(text = "Item 1",
tabName = "panel_1"),
menuItem(text = "Item 2",
tabName = "panel_2"),
menuItem(text = "Item 3",
tabName = "panel_3")
)
),
dashboardBody(tabItems(
tabItem(tabName = 'panel_1',
tabPanel("Panel 1")),
tabItem(tabName = 'panel_2',
tabPanel("Panel 2")),
tabItem(tabName = 'panel_3',
tabPanel(
"Panel 3",
htmlOutput('chart_1', width = '100px')
))
))
)
server <- function(input, output, session) {
# observeEvent(input$sidebarMenu, {
# if (input$sidebarMenu == "panel_3") {
# print("reloading shiny session")
# session$reload()
# }
# })
output$chart_1 <- renderUI({
input$sidebarMenu # take a reactive dependency on input$sidebarMenu
hc_data_1 %>%
hchart(
"line",
hcaes(x = year, y = pop),
showInLegend = TRUE,
color = "#63696b",
name = "chile-argentina"
)
})
}
shinyApp(ui = ui, server = server)

In Shiny need to dynamically update dropdown choices with updateRadioGroupButtons

Following R Shiny group buttons with individual hover dropdown selection, need to update the radiogroupbuttons dynamically based on some condition. The number of buttons may change.
I have at least the following queries related to the code below. 1) Does the tag belong in server? 2) how to dynamically multiply selectInput in the server code? 3) How to dynamically multiply the output? I have changed your implementation to fit closer to my application. All dropdowns have the same choices if the button is to be shown a dropdown, this is computed dynamically in dropdownTRUE. If dropdownTRUE==F, I don't need a dropdown.
library(shiny)
library(shinyWidgets)
js <- "
function qTip() {
$('#THE_INPUT_ID .radiobtn').each(function(i, $el){
var value = $(this).find('input[type=radio]').val();
var selector = '#select' + value;
$(this).qtip({
overwrite: true,
content: {
text: $(selector).parent().parent()
},
position: {
my: 'top left',
at: 'bottom right'
},
show: {
ready: false
},
hide: {
event: 'unfocus'
},
style: {
classes: 'qtip-blue qtip-rounded'
},
events: {
blur: function(event, api) {
api.elements.tooltip.hide();
}
}
});
});
}
function qTip_delayed(x){
setTimeout(function(){qTip();}, 500);
}
$(document).on('shiny:connected', function(){
Shiny.addCustomMessageHandler('qTip', qTip_delayed);
});
"
ui <- fluidPage(
tags$head( # does this belong to server?
tags$link(rel = "stylesheet", href = "jquery.qtip.min.css"),
tags$script(src = "jquery.qtip.min.js"),
tags$script(HTML(js))
),
br(),
uiOutput('bttns'),
verbatimTextOutput("selection1")
)
server <- function(input, output, session) {
session$sendCustomMessage("qTip", "")
output$bttns<-renderUI({
bttnchoices=c("A", "B", "C")
lenchoice=length(bttnchoices)
dropdownTRUE=sample(c(T,F),lenchoice,T,rep(.5,2)) ##bttns for which dropdown is to be shown
dropchoices = c("Apple", "Banana")# same choices to be shown for all buttons with dropdownTRUE
radioGroupButtons(
inputId = "THE_INPUT_ID",
individual = TRUE,
label = "Make a choice: ",
choices = bttnchoices
)
div(
style = "display: none;",
shinyInput(lenchoice,selectInput, # struggling with dynamic multiplication of selectInput, lapply?
"select",
label = "Select a fruit",
choices=dropchoices,
selectize = FALSE
))
})
observeEvent(input[["select1"]], {
if(input[["select1"]] == "Banana"){
session$sendCustomMessage("qTip", "")
output$bttns<-renderUI({
bttnchoices=c("D", "A")
lenchoice=length(bttnchoices)
dropdownTRUE=sample(c(T,F),lenchoice,T,rep(.5,2))
dropchoices = c("Peach", "Pear")
radioGroupButtons(
inputId = "THE_INPUT_ID",
individual = TRUE,
label = "Make a choice: ",
choices = bttnchoices
)
div(
style = "display: none;",
shinyInput(lenchoice,selectInput,
"select",
label = "Select a fruit",
choices = dropchoices,
selectize = FALSE
))
})
}
output$selection1<-input$select1 # struggling with dynamic multiplication of outputs, lapply?
})
}
shinyApp(ui, server)

Here is the way. The values of the radio buttons must correspond to the suffixes of the selectInput's ids. Here A, B, C, D are the values and then the ids of the selectInput are selectA, selectB, selectC, selectD. If you want to use other names for the radio buttons, do choices = list("name1" = "A", "name2" = "B", "name3" = "C", "name4" = "D").
library(shiny)
library(shinyWidgets)
js <- "
function qTip() {
$('#THE_INPUT_ID .radiobtn').each(function(i, $el){
var value = $(this).find('input[type=radio]').val();
var selector = '#select' + value;
$(this).qtip({
overwrite: true,
content: {
text: $(selector).parent().parent()
},
position: {
my: 'top left',
at: 'bottom right'
},
show: {
ready: false
},
hide: {
event: 'unfocus'
},
style: {
classes: 'qtip-blue qtip-rounded'
},
events: {
blur: function(event, api) {
api.elements.tooltip.hide();
}
}
});
});
}
function qTip_delayed(x){
setTimeout(function(){qTip();}, 500);
}
$(document).on('shiny:connected', function(){
Shiny.addCustomMessageHandler('qTip', qTip_delayed);
});
"
ui <- fluidPage(
tags$head(
tags$link(rel = "stylesheet", href = "jquery.qtip.min.css"),
tags$script(src = "jquery.qtip.min.js"),
tags$script(HTML(js))
),
br(),
radioGroupButtons(
inputId = "THE_INPUT_ID",
individual = TRUE,
label = "Make a choice: ",
choices = c("A", "B", "C")
),
br(), br(), br(),
verbatimTextOutput("selectionA"),
verbatimTextOutput("selectionB"),
verbatimTextOutput("selectionC"),
verbatimTextOutput("selectionD"),
div(
style = "display: none;",
selectInput(
"selectA",
label = "Select a fruit",
choices = c("Apple", "Banana"),
selectize = FALSE
),
selectInput(
"selectB",
label = "Select a fruit",
choices = c("Lemon", "Orange"),
selectize = FALSE
),
selectInput(
"selectC",
label = "Select a fruit",
choices = c("Strawberry", "Pineapple"),
selectize = FALSE
),
selectInput(
"selectD",
label = "Select a fruit",
choices = c("Pear", "Peach"),
selectize = FALSE
)
)
)
server <- function(input, output, session) {
session$sendCustomMessage("qTip", "")
output[["selectionA"]] <- renderPrint(input[["selectA"]])
output[["selectionB"]] <- renderPrint(input[["selectB"]])
output[["selectionC"]] <- renderPrint(input[["selectC"]])
output[["selectionD"]] <- renderPrint(input[["selectD"]])
observeEvent(input[["selectA"]], {
if(input[["selectA"]] == "Banana"){
updateRadioGroupButtons(session, inputId = "THE_INPUT_ID",
label = "Make NEW choice: ",
choices = c("D","A"))
session$sendCustomMessage("qTip", "")
}
})
}
shinyApp(ui, server)
EDIT
The following way allows to set dropdowns for a chosen list of radio buttons.
library(shiny)
library(shinyWidgets)
js <- "
function qTip(values, ids) {
$('#THE_INPUT_ID .radiobtn').each(function(i, $el){
var value = $(this).find('input[type=radio]').val();
if(values.indexOf(value) > -1){
var selector = '#' + ids[value];
$(this).qtip({
overwrite: true,
content: {
text: $(selector).parent().parent()
},
position: {
my: 'top left',
at: 'bottom right'
},
show: {
ready: false
},
hide: {
event: 'unfocus'
},
style: {
classes: 'qtip-blue qtip-rounded'
},
events: {
blur: function(event, api) {
api.elements.tooltip.hide();
}
}
});
}
});
}
function qTip_delayed(mssg){
$('[data-hasqtip]').qtip('destroy', true);
setTimeout(function(){qTip(mssg.values, mssg.ids);}, 500);
}
$(document).on('shiny:connected', function(){
Shiny.addCustomMessageHandler('qTip', qTip_delayed);
});
"
ui <- fluidPage(
tags$head(
tags$link(rel = "stylesheet", href = "jquery.qtip.min.css"),
tags$script(src = "jquery.qtip.min.js"),
tags$script(HTML(js))
),
br(),
radioGroupButtons(
inputId = "THE_INPUT_ID",
individual = TRUE,
label = "Make a choice: ",
choices = c("A", "B", "C")
),
br(), br(), br(),
uiOutput("selections"),
uiOutput("dropdowns")
)
server <- function(input, output, session) {
dropdowns <- reactiveVal(list( # initial dropdowns
A = c("Apple", "Banana"),
B = c("Lemon", "Orange"),
C = c("Strawberry", "Pineapple")
))
flag <- reactiveVal(FALSE)
prefix <- reactiveVal("")
observeEvent(dropdowns(), {
if(flag()) prefix(paste0("x",prefix()))
flag(TRUE)
}, priority = 2)
observeEvent(input[["selectA"]], {
if(input[["selectA"]] == "Banana"){
updateRadioGroupButtons(session, inputId = "THE_INPUT_ID",
label = "Make NEW choice: ",
choices = c("D","A","B"))
dropdowns( # new dropdowns, only for D and B
list(
D = c("Pear", "Peach"),
B = c("Watermelon", "Mango")
)
)
}
})
observeEvent(dropdowns(), {
req(dropdowns())
session$sendCustomMessage(
"qTip",
list(
values = as.list(names(dropdowns())),
ids = setNames(
as.list(paste0(prefix(), "select", names(dropdowns()))),
names(dropdowns())
)
)
)
})
observeEvent(dropdowns(), {
req(dropdowns())
lapply(names(dropdowns()), function(value){
output[[paste0("selection",value)]] <-
renderPrint(input[[paste0(prefix(), "select", value)]])
})
})
output[["dropdowns"]] <- renderUI({
req(dropdowns())
selectInputs <- lapply(names(dropdowns()), function(value){
div(style = "display: none;",
selectInput(
paste0(prefix(), "select", value),
label = "Select a fruit",
choices = dropdowns()[[value]],
selectize = FALSE
)
)
})
do.call(tagList, selectInputs)
})
output[["selections"]] <- renderUI({
req(dropdowns())
verbOutputs <- lapply(names(dropdowns()), function(value){
verbatimTextOutput(
paste0("selection", value)
)
})
do.call(tagList, verbOutputs)
})
}
shinyApp(ui, server)

How to pass shinytree values to drop down input in shiny

I'm trying to create dropdown input in shiny which has hierarchical drop-down list in R shiny like below:
hierarchical drop-down list in R shiny
For now I'm able to create an shinytree where we can display the entire list, but I want display the list in dropdown instead of shinytree.
Below is my code:
library(shiny)
library(shinyTree)
# Define UI for application:
ui <- {fluidPage(
sidebarLayout(
sidebarPanel(width = 3,
div(shinyTree("Tree",checkbox = TRUE)),
verbatimTextOutput("selected")
),
mainPanel(width = 9)
)
)}
# Define server logic:
server <- function(input, output, session){
observe({
df <- data.frame(
child= c('a','b','c','d','e','f','g','h'),
parent = c('f','f','f','g','h','i','i','i'))
tree <- FromDataFrameNetwork(df)
filtered_value <- as.list(tree)
filtered_value <- filtered_value[-1]
output$Tree <- renderTree({
filtered_value
})
})
}
# Run the application
shinyApp(ui = ui, server = server)
I'm looking for input in this manner: Custom-Dropdown

I did a Shiny binding for the ComboTree library yesterday. It works but this is not fantastic.
File comboTreeBinding.js to put in the www subfolder:
var comboTreeBinding = new Shiny.InputBinding();
$.extend(comboTreeBinding, {
find: function (scope) {
return $(scope).find(".comboTree");
},
getValue: function (el) {
var value = el.value.split(", ");
var empty = value.length === 1 && value[0] === "";
return empty ? null : value;
},
setValue: function(el, value) {
$(el).setSelection(value);
},
subscribe: function (el, callback) {
$(el).on("change.comboTreeBinding", function (e) {
callback();
});
},
unsubscribe: function (el) {
$(el).off(".comboTreeBinding");
},
initialize: function(el) {
var $el = $(el);
$el.comboTree({
source: $el.data("choices"),
isMultiple: $el.data("multiple"),
cascadeSelect: $el.data("cascaded"),
collapse: true
});
}
});
Shiny.inputBindings.register(comboTreeBinding);
Shiny app (put the files style.css and comboTreePlugin.js in the www subfolder):
library(shiny)
library(jsonlite)
comboTreeInput <- function(inputId, width = "30%", height = "100px",
choices, multiple = TRUE, cascaded = TRUE){
tags$div(style = sprintf("width: %s; height: %s;", width, height),
tags$input(id = inputId, class = "comboTree", type = "text",
placeholder = "Select",
`data-choices` = as.character(toJSON(choices, auto_unbox = TRUE)),
`data-multiple` = ifelse(multiple, "true", "false"),
`data-cascaded` = ifelse(cascaded, "true", "false")
)
)
}
choices <- list(
list(id = 1, title = "item1"),
list(id = 2, title = "item2",
subs = list(
list(id = 21, title = "item2-1"),
list(id = 22, title = "item2-2")
)
),
list(id = 3, title = "item3",
subs = list(
list(id = 31, title = "item3-1", isSelectable = FALSE,
subs = list(
list(id = 311, title = "item3-1-1"),
list(id = 312, title = "item3-1-2")
)
),
list(id = 32, title = "item3-2")
)
)
)
ui <- fluidPage(
tags$head(
tags$link(rel = "stylesheet", href = "style.css"),
tags$script(src = "comboTreePlugin.js"),
tags$script(src = "comboTreeBinding.js")
),
br(),
h3("You selected:"),
verbatimTextOutput("selections"),
br(),
comboTreeInput("mycombotree", choices = choices)
)
server <- function(input, output, session){
output[["selections"]] <- renderPrint({
input[["mycombotree"]]
})
}
shinyApp(ui, server)

Shinydashboard: make the sidebar open over the body instead of squeezing the main body

Instead of having the sidebar open and squeeze the body, I would like the sidebar to open by going over the body so it does not mess up the size of my output.
How could I achieve that if even possible?
Current behavior:
Desired behavior:
Code used on the example:
library(shinydashboard)
ui <- dashboardPage(
dashboardHeader(title = "Basic dashboard"),
dashboardSidebar(
sidebarMenu(
menuItem("Dashboard", tabName = "dashboard", icon = icon("dashboard")),
menuItem("Widgets", tabName = "widgets", icon = icon("th"))
)
),
dashboardBody(
tabItems(
# First tab content
tabItem(tabName = "dashboard",
fluidRow(
box(plotOutput("plot1", height = 250)),
box(
title = "Controls",
sliderInput("slider", "Number of observations:", 1, 100, 50)
)
)
),
# Second tab content
tabItem(tabName = "widgets",
h2("Widgets tab content")
)
)
)
)
server <- function(input, output) {
set.seed(122)
histdata <- rnorm(500)
output$plot1 <- renderPlot({
data <- histdata[seq_len(input$slider)]
hist(data)
})
}
shinyApp(ui, server)

Try this updated code and see if it meets your needs. From my viewpoint at least having the sidebar open over the chart looks not too great. Why not open your app without the sidebar being present?
library(shinydashboard)
library(shinyjs)
ui <- dashboardPage(
dashboardHeader(title = "Basic dashboard"),
dashboardSidebar(
sidebarMenu(
menuItem("Dashboard", tabName = "dashboard", icon = icon("dashboard")),
menuItem("Widgets", tabName = "widgets", icon = icon("th"))
)
),
dashboardBody(
useShinyjs(),
tabItems(
# First tab content
tabItem(tabName = "dashboard",
fluidRow(
box(plotOutput("plot1", height = 250)),
box(
title = "Controls",
sliderInput("slider", "Number of observations:", 1, 100, 50)
)
)
),
# Second tab content
tabItem(tabName = "widgets",
h2("Widgets tab content")
)
)
)
)
server <- function(input, output) {
addClass(selector = "body", class = "sidebar-collapse")
set.seed(122)
histdata <- rnorm(500)
output$plot1 <- renderPlot({
data <- histdata[seq_len(input$slider)]
hist(data)
})
}
shinyApp(ui, server)

shinyBS observe toggling of bsCollapsePanel

my question relates to observing the event of toggling and untoggling of the header in bsCollapsePanel in shinyBS.
Lets consider following following app as an example:
library(shiny)
library(shinyBS)
server = function(input, output, session) {
observeEvent(input$p1Button, ({
updateCollapse(session, "collapseExample", open = "Panel 1")
}))
observeEvent(input$styleSelect, ({
updateCollapse(session, "collapseExample", style = list("Panel 1" = input$styleSelect))
}))
output$randomNumber <- reactive(paste0('some random number'))
}
ui = fluidPage(
sidebarLayout(
sidebarPanel(HTML("This button will open Panel 1 using <code>updateCollapse</code>."),
actionButton("p1Button", "Push Me!"),
selectInput("styleSelect", "Select style for Panel 1",
c("default", "primary", "danger", "warning", "info", "success"))
),
mainPanel(
bsCollapse(id = "collapseExample", open = "Panel 2",
bsCollapsePanel("Panel 1", "This is a panel with just text ",
"and has the default style. You can change the style in ",
"the sidebar.", style = "info")
),
verbatimTextOutput('randomNumber')
)
)
)
app = shinyApp(ui = ui, server = server)
I want the app to be able to print a random number (using R shiny reactivity) in the verbatimTextOutput('randomNumber') field every time I open bsCollapsePanel by clicking on Panel 1 header.
I was thinking that it may be possible using shinyjs package but have not found many examples of these two packages used together.

Okay, Mike Wise was faster than me :)
If for some reason my solution is also helpful let me know otherwise i delete it.
library(shiny)
library(shinyjs)
library(shinyBS)
ui = fluidPage(
useShinyjs(),
sidebarLayout(
sidebarPanel(HTML("This button will open Panel1 using <code>updateCollapse</code>."),
actionButton("p1Button", "Push Me!"),
selectInput("styleSelect", "Select style for Panel1",
c("default", "primary", "danger", "warning", "info", "success"))
),
mainPanel(
bsCollapse(id = "collapseExample", open = "Panel 2",
bsCollapsePanel("Panel1", "This is a panel with just text ",
"and has the default style. You can change the style in ",
"the sidebar.", style = "info", id = "me23")
),
verbatimTextOutput('randomNumber')
)
)
)
server = function(input, output, session) {
observeEvent(input$p1Button, ({
updateCollapse(session, "collapseExample", open = "Panel1")
}))
observeEvent(input$styleSelect, ({
updateCollapse(session, "collapseExample", style = list("Panel1" = input$styleSelect))
}))
observe({
runjs("function getAllElementsWithAttribute(attribute){
var matchingElements = [];
var allElements = document.getElementsByTagName('*');
for (var i = 0, n = allElements.length; i < n; i++)
{
if (allElements[i].getAttribute(attribute) !== null)
{
// Element exists with attribute. Add to array.
matchingElements.push(allElements[i]);
}
}
return matchingElements;
};
ahref = getAllElementsWithAttribute('data-toggle');
ahref[0].onclick = function() {
var nmbr = Math.random();
Shiny.onInputChange('randomNumber', nmbr);
};
")
})
output$randomNumber <- reactive(paste0(input$randomNumber))
}
shinyApp(ui = ui, server = server)
Javascript code you can find here:
Get elements by attribute when querySelectorAll is not available without using libraries?

I am not completely sure what you want, but this might be close. These are the additions:
Added an observeEvent to monitor your Panel 1 header.
Added a reactiveValues to hold the "random number"
Incremented that value in the above observeEvent handler when Panel 1 is pushed.
Here is the code:
library(shiny)
library(shinyBS)
server = function(input, output, session) {
rv <- reactiveValues(number=0)
observeEvent(input$p1Button, ({
updateCollapse(session, "collapseExample", open = "Panel 1")
}))
observeEvent(input$styleSelect, ({
updateCollapse(session, "collapseExample", style = list("Panel 1" = input$styleSelect))
}))
observeEvent(input$collapseExample, ({
rv$number <- rv$number+1
}))
output$randomNumber <- reactive(rv$number)
}
ui = fluidPage(
sidebarLayout(
sidebarPanel(HTML("This button will open Panel 1 using <code>updateCollapse</code>."),
actionButton("p1Button", "Push Me!"),
selectInput("styleSelect", "Select style for Panel 1",
c("default", "primary", "danger", "warning", "info", "success"))
),
mainPanel(
bsCollapse(id = "collapseExample", open = "Panel 2",
bsCollapsePanel("Panel 1", "This is a panel with just text ",
"and has the default style. You can change the style in ",
"the sidebar.", style = "info")
),
verbatimTextOutput('randomNumber')
)
)
)
shinyApp(ui = ui, server = server)
And a screen shot: