I saw this question has been asked before but not answered. When using tcltk::tk_choose.files() the first time during an R session it opens behind the R main window. All further times it opens in front of the main window (as it should!). Is there a way to have it always in the very front?
Ultimately I would like to use it via shiny as below. So it should also be in front of the shiny window.
library(shiny)
ui <- fluidPage(
actionButton("do", "Open window")
)
server <- function(input, output, session) {
observeEvent(input$do, {
tcltk::tk_choose.files()
})
}
shinyApp(ui, server)
I am aware of base::file.choose() and utils::choose.files(). However, the first does not allow to select multiple files at once and the second does not allow to copy/paste paths for quicker navigation which drives me crazy,..
Related
I am running a lengthy .bat file with an action button in a shiny app. I am able to show the progress bar, however, the progress bar(blue) prints about 10% and sits there for a long time. After the .bat file is finished, then the progress bar quickly moves to 100%. My question is: How can I show the progress bar moving at all times while the .bat file is executing. The code I am using is below but I am not able to provide the .bat file that I am running because it depends on other large files.
library(shiny)
library(shinyWidgets)
library(ggplot2)
library(shinycssloaders)
ui <- fluidPage(titlePanel(h1("Progress Bar Test",align="center")),
mainPanel(
sidebarPanel(
actionButton("buttonId", "Create exe file"))))
server <- function(input, output, session) {
observeEvent(input$buttonId, {
withProgress(message = 'Creating executable',
detail = 'It takes about 30 seconds per year...',{
bat <- shell("mybatchfile.bat,wait=TRUE")
for (i in 1:length(bat)){
incProgress(setProgress(i/length(bat)))
Sys.sleep(2)
}
} )}
)}
# Run the application
shinyApp(ui = ui, server = server)
i'm trying to show a logo in my Shiny app, but when i try to see i only can see a small icon, but not the image, this is my code:
library(shiny)
ui <- fluidPage(
mainPanel(
img(src='C:/Users/carlo239/image[![enter image description here][1]][1]/Capture2.jpg',
align = "right", height = '300px'),
### the rest of your code
)
)
server <- function(input, output, session) {
}
shinyApp(ui, server)
And this is the issue, i tried to reload, but is not working,
I know that the image is ok, because if i click on Download i get the same image, but i'm unable to see in my outputs. THANKS !!
There are two ways:
Put the file in the www folder of your app (as suggested by #YBS). That is in most cases the recommended solution.
"Register" your folder as resource folder for your app (see below). However, that solution is intended to help package authors make resources available to the package's components. Also be aware that absolute paths can pose problems when you deploy your app.
library(shiny)
ui <- fluidPage(
mainPanel(
img(src='/foo/Capture2.jpg',
align = "right", height = '300px'),
### the rest of your code
)
)
server <- function(input, output, session) {
addResourcePath("foo", "C:/Users/wherever/your/file/may/be/located")
}
shinyApp(ui, server)
I am trying to create a shiny app where users can upload their own data and get a visualization of the network dynamics in their data. I'm using the render.d3movie() function from the ndtv package to create an HTML object from the network with some user input parameters. I want to display this HTML object in one of my tabPanel()s but weirdly, it shows up on every panel instead. I tried with a different HTML file and this one works just fine. To reproduce this, you'll need to download the test and network animation html files and put them in the same directory as the example shiny app code below.
Example:
library(shiny)
# Define UI for application that draws a histogram
ui <- fluidPage(
navbarPage("ShinyExample",
tabPanel("TEST", HTML("FirstPage"), includeHTML("test.html")),
tabPanel("TEST2", HTML("SecondPage"), includeHTML("NetworkAnimation.html"))
)
)
# Define server logic required to draw a histogram
server <- function(input, output) {
# Stuff to render and save the network Animation happens here
}
# Run the application
shinyApp(ui = ui, server = server)
Expected Behavior:
test.html and NetworkAnimation.html should only be rendered within their respective tabPanel()
Observed Behavior:
test.html is only rendered in it's respective tabPanel() but NetworkAnimation.html is rendered on both tabPanel() s
The network-widget is appended to the body in the NetworkAnimation.html-Javascript:
target = d3.select('body').append('div').style({width: '100%', height: '100%'}).node();.
If you want it to be on Tab 2 only, you can include a div with id and change the JavaScript line, so that it gets appended to your div.
My App looks like this:
ui <- fluidPage(
## Include shinyjs
useShinyjs(),
## Set ID of navbarPage
navbarPage("ShinyExample", id = "navid",
tabPanel("TEST", includeHTML("test.html")),
tabPanel("TEST2",
## Include new DIV here & Set initial height
div(id="appendhere", style="height: 1090px;"),
includeHTML("NetworkAnimation.html"))
)
)
server <- function(input, output) {
observe({
req(input$navid == "TEST2")
runjs('$("#appendhere").resize()')
})
}
# Run the application
shinyApp(ui = ui, server = server)
and the JS is changed to
target = d3.select('#appendhere').append('div').style({width: '100%', height: '100%'}).node();
I also had to include shinyjs, to run some JavaScript when TAB2 is active. The width/height of the svg is calculated when it is rendered and therefore initially 0 (or actually -60).
If you remove the runjs line, you will see that the network is not visible.
By changing the browser size, the network gets redrawn and width/height are updated. Therefore we call $("#appendhere").resize() when TAB2 is active.
There is still the following error in the browser console, but everything seems to work fine.
Uncaught TypeError: a is undefined
I'm fairly new to R Shiny but am stuck with the following problem for some time now and hope you can provide some help:
I try to refresh a plot in R shiny that should be refreshed if either a new input argument is entered OR an action button is pressed. This should be straightforward, but unfortunately I can't solve it, despite googling/reading instructions for some time. Any advice would be recommended. Any solutions on the web seem to put the whole renderplot function inside the observeEvent function, but I also need the renderplot in addition outside of it to account for the possibility of just entering inputs without pressing the action button.
I have no trouble creating a (render)plot that either exclusively is refreshed when entering a new input or exclusively refreshed when pressing a button.
However when doing both at the same I fail: I first tried to copy the renderplot function including the resulting output twice one time within an observeEvent function (to account for clicking the action button) and one time outside of an observeEvent (to account for only refreshing the inputs to the plot) but this leads only to a greyed out graph that refreshes after ~10 seconds delay when pressing the action button. I imagine adding the reactive click input generated from clicking the action button directly to the renderplot outside of observe event , but so far I couldn't get it to run. Any recommendations would be much appreciated.
Thank you in advance.
Like this?:
Edit: No need to pass the selectInput to the reactive Vals.. this does the same:
library(shiny)
ui <- fluidPage(
sidebarLayout(
sidebarPanel(
selectInput(inputId="select", label="title", choices=LETTERS[1:3], selected = "A"),
actionButton(inputId="btn", label="refresh")
),
mainPanel(
plotOutput("scatterPlot")
)
)
)
server <- function(input, output) {
plotSettings <- reactiveValues()
observeEvent(c(input$btn, input$select), {
plotSettings$values <- runif(100,1,100)
# plotSettings$title <- input$select
}, ignoreNULL = FALSE)
output$scatterPlot <- renderPlot({
plot(plotSettings$values, main=input$select)
})
}
shinyApp(ui = ui, server = server)
In my Shiny app I want to open several URL's with a short delay between opening.
Here is some example code that works just fine when I run the app in my RStudio.
library(shiny)
URLs <- c("http://www.google.com", "http://www.stackoverflow.com")
ui <- fluidPage(
actionButton(
"click",
"Click here to open several browser tabs"
)
)
server <- function(input, output){
observeEvent(input$click, {
for (i in URLs){
browseURL(i)
Sys.sleep(1) #Short delay of 1 second
}
})
}
shinyApp(ui, server)
However, when I run this app on shinyapps.io, browseURL() doesn't work (as mentioned here).
Does anyone know how to open multiple browser tabs with a short delay between opening them, so that it also works when the app is deployed on shinyapps.io?
Would it be possible with R code or is JavaScript necessary?
This is a pretty old question, but answering in case others stumble upon while searching.
As mentioned in the reference you linked, I think you need to use some JS to accomplish this task. Below is an example of using the shinyjs package to define a shiny compatible browseURL function. Once we have the function defined we add a few lines to the ui and then call it in the server as js$browseURL().
Note that a pop-up blocker might block the effects of opening multiple tabs. Check your blocker settings if things don't seem to work.
library(shiny)
library(shinyjs)
# define js function for opening urls in new tab/window
js_code <- "
shinyjs.browseURL = function(url) {
window.open(url,'_blank');
}
"
URLs <- c("http://www.google.com", "http://www.stackoverflow.com")
ui <- fluidPage(
# set up shiny js to be able to call our browseURL function
useShinyjs(),
extendShinyjs(text = js_code, functions = 'browseURL'),
actionButton(
"click",
"Click here to open several browser tabs"
)
)
server <- function(input, output){
observeEvent(input$click, {
for (i in URLs){
js$browseURL(i)
Sys.sleep(1) #Short delay of 1 second
}
})
}
shinyApp(ui, server)