Mixing
Loading shiny module only when menu items is clicked
2
Background
Within a modular1 Shiny application, I would like to load module only when menu item on shinydashboard is clicked. If the menu item is not accessed I wouldn't like to load the module.
Basic application
app.R
# Libs
library(shiny)
library(shinydashboard)
# Source module
source("sample_module.R")
ui <- dashboardPage(
dashboardHeader(title = "Dynamic sidebar"),
dashboardSidebar(sidebarMenuOutput("menu")),
dashboardBody(tabItems(
tabItem(tabName = "tab_one", h1("Tab One")),
tabItem(tabName = "tab_two", sampleModuleUI("sampleModule"))
))
)
server <- function(input, output) {
callModule(sampleModuleServer, "sampleModule")
output$menu <- renderMenu({
sidebarMenu(
menuItem(
"Menu item 1",
icon = icon("calendar"),
tabName = "tab_one"
),
menuItem(
"Menu item 2",
icon = icon("globe"),
tabName = "tab_two"
)
)
})
}
shinyApp(ui, server)
sample_module.R
sampleModuleServer <- function(input, output, session) {
output$plot1 <- renderPlot({
plot(mtcars)
})
}
sampleModuleUI <- function(id) {
ns <- NS(id)
plotOutput(ns("plot1"))
}
Desired implementation
The desired implementation would load sample_module only when the relevant menu item is clicked. On the lines of 2:
Don't call callModule from inside observeEvent; keep it at the top level. Take the reactive expression that's returned, and use eventReactive to wrap it in the button click. And use the eventReactive from your outputs, etc.
x <- callModule(...)
y <- eventReactive(input$go, x())
output$tbl <- DT::renderDataTable(y())
Attempt
app.R (modified)
# Libs
library(shiny)
library(shinydashboard)
# Source module
source("sample_module.R")
ui <- dashboardPage(
dashboardHeader(title = "Dynamic sidebar"),
dashboardSidebar(sidebarMenuOutput("menu")),
dashboardBody(tabItems(
tabItem(tabName = "tab_one", h1("Tab One")),
tabItem(tabName = "tab_two", sampleModuleUI("sampleModule"))
))
)
server <- function(input, output) {
eventReactive(eventExpr = input$tab_two,
valueExpr = callModule(sampleModuleServer, "sampleModule")
)
output$menu <- renderMenu({
sidebarMenu(
menuItem(
"Menu item 1",
icon = icon("calendar"),
tabName = "tab_one"
),
menuItem(
"Menu item 2",
icon = icon("globe"),
tabName = "tab_two"
)
)
})
}
shinyApp(ui, server)
Problem
Application runs but the module does not load. Questions:
- How to correctly call
eventReactiveon dashboard menu item? Thetab_itemdoes not seem to haveidparameter istabNameequivalent in that context? - The linked discussion refers to refreshing one table. I'm trying to figure out example that will work with modules containing numerous interface element and elaborate server calls.
Clicking on Menu item 2 should display the content from the sample_module.R file.
1Modularizing Shiny app code
2Google groups: activate module with actionButton
Update
I've tried explicitly forcing module into application environment load using the following syntax:
eventReactive(eventExpr = input$tab_two,
valueExpr = callModule(sampleModuleServer, "sampleModule"),
domain = MainAppDomain
)
where
MainAppDomain <- getDefaultReactiveDomain()
r shiny shinydashboard shiny-reactivity
asked Oct 29 '18 at 16:14
KonradKonrad
7,458953101
add a comment |
2
Background
Within a modular1 Shiny application, I would like to load module only when menu item on shinydashboard is clicked. If the menu item is not accessed I wouldn't like to load the module.
Basic application
app.R
# Libs
library(shiny)
library(shinydashboard)
# Source module
source("sample_module.R")
ui <- dashboardPage(
dashboardHeader(title = "Dynamic sidebar"),
dashboardSidebar(sidebarMenuOutput("menu")),
dashboardBody(tabItems(
tabItem(tabName = "tab_one", h1("Tab One")),
tabItem(tabName = "tab_two", sampleModuleUI("sampleModule"))
))
)
server <- function(input, output) {
callModule(sampleModuleServer, "sampleModule")
output$menu <- renderMenu({
sidebarMenu(
menuItem(
"Menu item 1",
icon = icon("calendar"),
tabName = "tab_one"
),
menuItem(
"Menu item 2",
icon = icon("globe"),
tabName = "tab_two"
)
)
})
}
shinyApp(ui, server)
sample_module.R
sampleModuleServer <- function(input, output, session) {
output$plot1 <- renderPlot({
plot(mtcars)
})
}
sampleModuleUI <- function(id) {
ns <- NS(id)
plotOutput(ns("plot1"))
}
Desired implementation
The desired implementation would load sample_module only when the relevant menu item is clicked. On the lines of 2:
Don't call callModule from inside observeEvent; keep it at the top level. Take the reactive expression that's returned, and use eventReactive to wrap it in the button click. And use the eventReactive from your outputs, etc.
x <- callModule(...)
y <- eventReactive(input$go, x())
output$tbl <- DT::renderDataTable(y())
Attempt
app.R (modified)
# Libs
library(shiny)
library(shinydashboard)
# Source module
source("sample_module.R")
ui <- dashboardPage(
dashboardHeader(title = "Dynamic sidebar"),
dashboardSidebar(sidebarMenuOutput("menu")),
dashboardBody(tabItems(
tabItem(tabName = "tab_one", h1("Tab One")),
tabItem(tabName = "tab_two", sampleModuleUI("sampleModule"))
))
)
server <- function(input, output) {
eventReactive(eventExpr = input$tab_two,
valueExpr = callModule(sampleModuleServer, "sampleModule")
)
output$menu <- renderMenu({
sidebarMenu(
menuItem(
"Menu item 1",
icon = icon("calendar"),
tabName = "tab_one"
),
menuItem(
"Menu item 2",
icon = icon("globe"),
tabName = "tab_two"
)
)
})
}
shinyApp(ui, server)
Problem
Application runs but the module does not load. Questions:
- How to correctly call
eventReactiveon dashboard menu item? Thetab_itemdoes not seem to haveidparameter istabNameequivalent in that context? - The linked discussion refers to refreshing one table. I'm trying to figure out example that will work with modules containing numerous interface element and elaborate server calls.
Clicking on Menu item 2 should display the content from the sample_module.R file.
1Modularizing Shiny app code
2Google groups: activate module with actionButton
Update
I've tried explicitly forcing module into application environment load using the following syntax:
eventReactive(eventExpr = input$tab_two,
valueExpr = callModule(sampleModuleServer, "sampleModule"),
domain = MainAppDomain
)
where
MainAppDomain <- getDefaultReactiveDomain()
r shiny shinydashboard shiny-reactivity
asked Oct 29 '18 at 16:14
KonradKonrad
7,458953101
add a comment |
2
2
2
Background
Within a modular1 Shiny application, I would like to load module only when menu item on shinydashboard is clicked. If the menu item is not accessed I wouldn't like to load the module.
Basic application
app.R
# Libs
library(shiny)
library(shinydashboard)
# Source module
source("sample_module.R")
ui <- dashboardPage(
dashboardHeader(title = "Dynamic sidebar"),
dashboardSidebar(sidebarMenuOutput("menu")),
dashboardBody(tabItems(
tabItem(tabName = "tab_one", h1("Tab One")),
tabItem(tabName = "tab_two", sampleModuleUI("sampleModule"))
))
)
server <- function(input, output) {
callModule(sampleModuleServer, "sampleModule")
output$menu <- renderMenu({
sidebarMenu(
menuItem(
"Menu item 1",
icon = icon("calendar"),
tabName = "tab_one"
),
menuItem(
"Menu item 2",
icon = icon("globe"),
tabName = "tab_two"
)
)
})
}
shinyApp(ui, server)
sample_module.R
sampleModuleServer <- function(input, output, session) {
output$plot1 <- renderPlot({
plot(mtcars)
})
}
sampleModuleUI <- function(id) {
ns <- NS(id)
plotOutput(ns("plot1"))
}
Desired implementation
The desired implementation would load sample_module only when the relevant menu item is clicked. On the lines of 2:
Don't call callModule from inside observeEvent; keep it at the top level. Take the reactive expression that's returned, and use eventReactive to wrap it in the button click. And use the eventReactive from your outputs, etc.
x <- callModule(...)
y <- eventReactive(input$go, x())
output$tbl <- DT::renderDataTable(y())
Attempt
app.R (modified)
# Libs
library(shiny)
library(shinydashboard)
# Source module
source("sample_module.R")
ui <- dashboardPage(
dashboardHeader(title = "Dynamic sidebar"),
dashboardSidebar(sidebarMenuOutput("menu")),
dashboardBody(tabItems(
tabItem(tabName = "tab_one", h1("Tab One")),
tabItem(tabName = "tab_two", sampleModuleUI("sampleModule"))
))
)
server <- function(input, output) {
eventReactive(eventExpr = input$tab_two,
valueExpr = callModule(sampleModuleServer, "sampleModule")
)
output$menu <- renderMenu({
sidebarMenu(
menuItem(
"Menu item 1",
icon = icon("calendar"),
tabName = "tab_one"
),
menuItem(
"Menu item 2",
icon = icon("globe"),
tabName = "tab_two"
)
)
})
}
shinyApp(ui, server)
Problem
Application runs but the module does not load. Questions:
- How to correctly call
eventReactiveon dashboard menu item? Thetab_itemdoes not seem to haveidparameter istabNameequivalent in that context? - The linked discussion refers to refreshing one table. I'm trying to figure out example that will work with modules containing numerous interface element and elaborate server calls.
Clicking on Menu item 2 should display the content from the sample_module.R file.
1Modularizing Shiny app code
2Google groups: activate module with actionButton
Update
I've tried explicitly forcing module into application environment load using the following syntax:
eventReactive(eventExpr = input$tab_two,
valueExpr = callModule(sampleModuleServer, "sampleModule"),
domain = MainAppDomain
)
where
MainAppDomain <- getDefaultReactiveDomain()
r shiny shinydashboard shiny-reactivity
asked Oct 29 '18 at 16:14
KonradKonrad
7,458953101
Background
Within a modular1 Shiny application, I would like to load module only when menu item on shinydashboard is clicked. If the menu item is not accessed I wouldn't like to load the module.
Basic application
app.R
# Libs
library(shiny)
library(shinydashboard)
# Source module
source("sample_module.R")
ui <- dashboardPage(
dashboardHeader(title = "Dynamic sidebar"),
dashboardSidebar(sidebarMenuOutput("menu")),
dashboardBody(tabItems(
tabItem(tabName = "tab_one", h1("Tab One")),
tabItem(tabName = "tab_two", sampleModuleUI("sampleModule"))
))
)
server <- function(input, output) {
callModule(sampleModuleServer, "sampleModule")
output$menu <- renderMenu({
sidebarMenu(
menuItem(
"Menu item 1",
icon = icon("calendar"),
tabName = "tab_one"
),
menuItem(
"Menu item 2",
icon = icon("globe"),
tabName = "tab_two"
)
)
})
}
shinyApp(ui, server)
sample_module.R
sampleModuleServer <- function(input, output, session) {
output$plot1 <- renderPlot({
plot(mtcars)
})
}
sampleModuleUI <- function(id) {
ns <- NS(id)
plotOutput(ns("plot1"))
}
Desired implementation
The desired implementation would load sample_module only when the relevant menu item is clicked. On the lines of 2:
Don't call callModule from inside observeEvent; keep it at the top level. Take the reactive expression that's returned, and use eventReactive to wrap it in the button click. And use the eventReactive from your outputs, etc.
x <- callModule(...)
y <- eventReactive(input$go, x())
output$tbl <- DT::renderDataTable(y())
Attempt
app.R (modified)
# Libs
library(shiny)
library(shinydashboard)
# Source module
source("sample_module.R")
ui <- dashboardPage(
dashboardHeader(title = "Dynamic sidebar"),
dashboardSidebar(sidebarMenuOutput("menu")),
dashboardBody(tabItems(
tabItem(tabName = "tab_one", h1("Tab One")),
tabItem(tabName = "tab_two", sampleModuleUI("sampleModule"))
))
)
server <- function(input, output) {
eventReactive(eventExpr = input$tab_two,
valueExpr = callModule(sampleModuleServer, "sampleModule")
)
output$menu <- renderMenu({
sidebarMenu(
menuItem(
"Menu item 1",
icon = icon("calendar"),
tabName = "tab_one"
),
menuItem(
"Menu item 2",
icon = icon("globe"),
tabName = "tab_two"
)
)
})
}
shinyApp(ui, server)
Problem
Application runs but the module does not load. Questions:
- How to correctly call
eventReactiveon dashboard menu item? Thetab_itemdoes not seem to haveidparameter istabNameequivalent in that context? - The linked discussion refers to refreshing one table. I'm trying to figure out example that will work with modules containing numerous interface element and elaborate server calls.
Clicking on Menu item 2 should display the content from the sample_module.R file.
1Modularizing Shiny app code
2Google groups: activate module with actionButton
Update
I've tried explicitly forcing module into application environment load using the following syntax:
eventReactive(eventExpr = input$tab_two,
valueExpr = callModule(sampleModuleServer, "sampleModule"),
domain = MainAppDomain
)
where
MainAppDomain <- getDefaultReactiveDomain()
r shiny shinydashboard shiny-reactivity
r shiny shinydashboard shiny-reactivity
asked Oct 29 '18 at 16:14
KonradKonrad
7,458953101
asked Oct 29 '18 at 16:14
KonradKonrad
7,458953101
edited Nov 21 '18 at 9:41
Konrad
asked Oct 29 '18 at 16:14
KonradKonrad
7,458953101
asked Oct 29 '18 at 16:14
KonradKonrad
7,458953101
asked Oct 29 '18 at 16:14
KonradKonrad
7,458953101
7,458953101
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
2
+50
Edit: Dropping Joe Cheng's top level statement:
# Libs
library(shiny)
library(shinydashboard)
# Source module
source("sample_module.R")
ui <- dashboardPage(
dashboardHeader(title = "Dynamic sidebar"),
dashboardSidebar(sidebarMenuOutput("menu")),
dashboardBody(tabItems(
tabItem(tabName = "tab_one", h1("Tab One")),
tabItem(tabName = "tab_two", sampleModuleUI("sampleModule"))
))
)
server <- function(input, output) {
observeEvent(input$tabs,{
if(input$tabs=="tab_two"){
callModule(sampleModuleServer, "sampleModule")
}
}, ignoreNULL = TRUE, ignoreInit = TRUE)
output$menu <- renderMenu({
sidebarMenu(id = "tabs",
menuItem(
"Menu item 1",
icon = icon("calendar"),
tabName = "tab_one"
),
menuItem(
"Menu item 2",
icon = icon("globe"),
tabName = "tab_two"
)
)
})
}
shinyApp(ui, server)
Furthermore, your sidebarMenu needs an id to access the selected tabs; please see the shinydashboard documentation.
answered Nov 21 '18 at 16:12
ismirsehregalismirsehregal
1,6341212
Thanks very much for showing the interest. Not sure if this does the job. To test, WithinsampleModuleServerI've includedstop("Module loaded, crashing..."). Now the app crashes on start (it does not launch). Whereas to my mind, it shouldn't it should only crash if I trigger the event calling this module (clicking on the link). Is that a sensible assumption?
– Konrad
Nov 21 '18 at 16:30
Well, then it seems we need to join the dark side and use observeEvent anyway. - please check my edit.
– ismirsehregal
Nov 21 '18 at 18:23
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
2
+50
Edit: Dropping Joe Cheng's top level statement:
# Libs
library(shiny)
library(shinydashboard)
# Source module
source("sample_module.R")
ui <- dashboardPage(
dashboardHeader(title = "Dynamic sidebar"),
dashboardSidebar(sidebarMenuOutput("menu")),
dashboardBody(tabItems(
tabItem(tabName = "tab_one", h1("Tab One")),
tabItem(tabName = "tab_two", sampleModuleUI("sampleModule"))
))
)
server <- function(input, output) {
observeEvent(input$tabs,{
if(input$tabs=="tab_two"){
callModule(sampleModuleServer, "sampleModule")
}
}, ignoreNULL = TRUE, ignoreInit = TRUE)
output$menu <- renderMenu({
sidebarMenu(id = "tabs",
menuItem(
"Menu item 1",
icon = icon("calendar"),
tabName = "tab_one"
),
menuItem(
"Menu item 2",
icon = icon("globe"),
tabName = "tab_two"
)
)
})
}
shinyApp(ui, server)
Furthermore, your sidebarMenu needs an id to access the selected tabs; please see the shinydashboard documentation.
answered Nov 21 '18 at 16:12
ismirsehregalismirsehregal
1,6341212
Thanks very much for showing the interest. Not sure if this does the job. To test, WithinsampleModuleServerI've includedstop("Module loaded, crashing..."). Now the app crashes on start (it does not launch). Whereas to my mind, it shouldn't it should only crash if I trigger the event calling this module (clicking on the link). Is that a sensible assumption?
– Konrad
Nov 21 '18 at 16:30
Well, then it seems we need to join the dark side and use observeEvent anyway. - please check my edit.
– ismirsehregal
Nov 21 '18 at 18:23
add a comment |
2
+50
Edit: Dropping Joe Cheng's top level statement:
# Libs
library(shiny)
library(shinydashboard)
# Source module
source("sample_module.R")
ui <- dashboardPage(
dashboardHeader(title = "Dynamic sidebar"),
dashboardSidebar(sidebarMenuOutput("menu")),
dashboardBody(tabItems(
tabItem(tabName = "tab_one", h1("Tab One")),
tabItem(tabName = "tab_two", sampleModuleUI("sampleModule"))
))
)
server <- function(input, output) {
observeEvent(input$tabs,{
if(input$tabs=="tab_two"){
callModule(sampleModuleServer, "sampleModule")
}
}, ignoreNULL = TRUE, ignoreInit = TRUE)
output$menu <- renderMenu({
sidebarMenu(id = "tabs",
menuItem(
"Menu item 1",
icon = icon("calendar"),
tabName = "tab_one"
),
menuItem(
"Menu item 2",
icon = icon("globe"),
tabName = "tab_two"
)
)
})
}
shinyApp(ui, server)
Furthermore, your sidebarMenu needs an id to access the selected tabs; please see the shinydashboard documentation.
answered Nov 21 '18 at 16:12
ismirsehregalismirsehregal
1,6341212
Thanks very much for showing the interest. Not sure if this does the job. To test, WithinsampleModuleServerI've includedstop("Module loaded, crashing..."). Now the app crashes on start (it does not launch). Whereas to my mind, it shouldn't it should only crash if I trigger the event calling this module (clicking on the link). Is that a sensible assumption?
– Konrad
Nov 21 '18 at 16:30
Well, then it seems we need to join the dark side and use observeEvent anyway. - please check my edit.
– ismirsehregal
Nov 21 '18 at 18:23
add a comment |
2
+50
2
+50
2
+50
Edit: Dropping Joe Cheng's top level statement:
# Libs
library(shiny)
library(shinydashboard)
# Source module
source("sample_module.R")
ui <- dashboardPage(
dashboardHeader(title = "Dynamic sidebar"),
dashboardSidebar(sidebarMenuOutput("menu")),
dashboardBody(tabItems(
tabItem(tabName = "tab_one", h1("Tab One")),
tabItem(tabName = "tab_two", sampleModuleUI("sampleModule"))
))
)
server <- function(input, output) {
observeEvent(input$tabs,{
if(input$tabs=="tab_two"){
callModule(sampleModuleServer, "sampleModule")
}
}, ignoreNULL = TRUE, ignoreInit = TRUE)
output$menu <- renderMenu({
sidebarMenu(id = "tabs",
menuItem(
"Menu item 1",
icon = icon("calendar"),
tabName = "tab_one"
),
menuItem(
"Menu item 2",
icon = icon("globe"),
tabName = "tab_two"
)
)
})
}
shinyApp(ui, server)
Furthermore, your sidebarMenu needs an id to access the selected tabs; please see the shinydashboard documentation.
answered Nov 21 '18 at 16:12
ismirsehregalismirsehregal
1,6341212
Edit: Dropping Joe Cheng's top level statement:
# Libs
library(shiny)
library(shinydashboard)
# Source module
source("sample_module.R")
ui <- dashboardPage(
dashboardHeader(title = "Dynamic sidebar"),
dashboardSidebar(sidebarMenuOutput("menu")),
dashboardBody(tabItems(
tabItem(tabName = "tab_one", h1("Tab One")),
tabItem(tabName = "tab_two", sampleModuleUI("sampleModule"))
))
)
server <- function(input, output) {
observeEvent(input$tabs,{
if(input$tabs=="tab_two"){
callModule(sampleModuleServer, "sampleModule")
}
}, ignoreNULL = TRUE, ignoreInit = TRUE)
output$menu <- renderMenu({
sidebarMenu(id = "tabs",
menuItem(
"Menu item 1",
icon = icon("calendar"),
tabName = "tab_one"
),
menuItem(
"Menu item 2",
icon = icon("globe"),
tabName = "tab_two"
)
)
})
}
shinyApp(ui, server)
Furthermore, your sidebarMenu needs an id to access the selected tabs; please see the shinydashboard documentation.
answered Nov 21 '18 at 16:12
ismirsehregalismirsehregal
1,6341212
edited Nov 21 '18 at 18:22
answered Nov 21 '18 at 16:12
ismirsehregalismirsehregal
1,6341212
answered Nov 21 '18 at 16:12
ismirsehregalismirsehregal
1,6341212
answered Nov 21 '18 at 16:12
ismirsehregalismirsehregal
1,6341212
1,6341212
Thanks very much for showing the interest. Not sure if this does the job. To test, WithinsampleModuleServerI've includedstop("Module loaded, crashing..."). Now the app crashes on start (it does not launch). Whereas to my mind, it shouldn't it should only crash if I trigger the event calling this module (clicking on the link). Is that a sensible assumption?
– Konrad
Nov 21 '18 at 16:30
Well, then it seems we need to join the dark side and use observeEvent anyway. - please check my edit.
– ismirsehregal
Nov 21 '18 at 18:23
add a comment |
Thanks very much for showing the interest. Not sure if this does the job. To test, WithinsampleModuleServerI've includedstop("Module loaded, crashing..."). Now the app crashes on start (it does not launch). Whereas to my mind, it shouldn't it should only crash if I trigger the event calling this module (clicking on the link). Is that a sensible assumption?
– Konrad
Nov 21 '18 at 16:30
Well, then it seems we need to join the dark side and use observeEvent anyway. - please check my edit.
– ismirsehregal
Nov 21 '18 at 18:23
Thanks very much for showing the interest. Not sure if this does the job. To test, Within
sampleModuleServer I've included stop("Module loaded, crashing..."). Now the app crashes on start (it does not launch). Whereas to my mind, it shouldn't it should only crash if I trigger the event calling this module (clicking on the link). Is that a sensible assumption?– Konrad
Nov 21 '18 at 16:30
Thanks very much for showing the interest. Not sure if this does the job. To test, Within
sampleModuleServer I've included stop("Module loaded, crashing..."). Now the app crashes on start (it does not launch). Whereas to my mind, it shouldn't it should only crash if I trigger the event calling this module (clicking on the link). Is that a sensible assumption?– Konrad
Nov 21 '18 at 16:30
Well, then it seems we need to join the dark side and use observeEvent anyway. - please check my edit.
– ismirsehregal
Nov 21 '18 at 18:23
Well, then it seems we need to join the dark side and use observeEvent anyway. - please check my edit.
– ismirsehregal
Nov 21 '18 at 18:23
add a comment |
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