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shiny demo observe
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library(shiny) | |
ui <- fluidPage( | |
fluidRow( | |
wellPanel(radioButtons(inputId = "radio1", label="Radio 1", choices = c("Yes", "No"), selected = "No"), | |
actionButton("btnClick1", "Click 1")) | |
), | |
fluidRow( | |
wellPanel(radioButtons(inputId = "radio2", label="Radio 2", choices = c("Yes", "No"), selected = "No"), | |
actionButton("btnClick2", "Click 2")) | |
), | |
fluidRow( | |
wellPanel(radioButtons(inputId = "radio3", label="Radio 3", choices = c("Yes", "No"), selected = "No"), | |
actionButton("btnClick3", "Click 3")) | |
) | |
) | |
options(shiny.reactlog=TRUE) | |
server <-function(input, output, session) { | |
values <- reactiveValues(radio1 = FALSE, radio2 = FALSE, radio3 = FALSE) | |
observe( | |
if (input$btnClick1) | |
{ | |
if (values$radio1 == TRUE) | |
{ | |
isolate({cat("input$btnClick1 ", input$btnClick1, "\n")}); | |
} | |
} | |
); | |
observeEvent(input$radio1, { | |
print("observeEvent input$radio1"); | |
if (input$radio1 == "Yes") { | |
print("Yes"); | |
values$radio1 = TRUE; | |
} else { | |
print("No"); | |
values$radio1 = FALSE; | |
} | |
}); | |
observe( | |
if (input$btnClick2) | |
{ | |
if (values$radio2 == TRUE) | |
{ | |
isolate({cat("input$btnClick2 ", input$btnClick2, "\n")}); | |
} | |
} | |
); | |
observeEvent(input$radio2, { | |
print("observeEvent input$radio2"); | |
if (input$radio2 == "Yes") { | |
print("Yes"); | |
values$radio2 = TRUE; | |
} else { | |
print("No"); | |
values$radio2 = FALSE; | |
} | |
freezeReactiveValue(values, "radio2") | |
}); | |
observeEvent(input$btnClick3, { | |
req(values$radio3 == TRUE); | |
isolate({cat("input$btnClick3 ", input$btnClick3, "\n")}); | |
}); | |
observeEvent(input$radio3, { | |
print("observeEvent input$radio3"); | |
if (input$radio3 == "Yes") { | |
print("Yes"); | |
values$radio3 = TRUE; | |
} else { | |
print("No"); | |
values$radio3 = FALSE; | |
} | |
}); | |
} | |
shinyApp(ui = ui, server = server) |
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