--- a/ShinyEB.R	Fri Oct 28 00:44:26 2022 +0900
+++ b/ShinyEB.R	Sun Oct 30 11:54:06 2022 +0900
@@ -20,7 +20,15 @@
                 value = 0.3),
             checkboxInput("isIP", "Initial Point", TRUE),
             checkboxInput("isIC_I", "Indiffrent Curves pass through the Initial Point", TRUE),
-            checkboxInput("isCore", "Core (this works only if the indiffrent curves above were plotted)", TRUE),
+            # チェックボックスありとなしの見えないタブを作る
+            tabsetPanel(
+                id = "tab4core",
+                type = "hidden",
+                tabPanel("true",
+                    checkboxInput("isCore", "Core", TRUE)
+                ),
+                tabPanel("false")
+            ),
             checkboxInput("isIC_E", "Indiffrent Curves pass through the Equilibrium", TRUE),
             checkboxInput("isSHP", "Separating Hyperplane", TRUE),
             checkboxInput("isCC", "Contract Curve", TRUE)
@@ -33,8 +41,13 @@
 )
 
 server <- function(input, output) {
+    # input$isIC_Iが変更されたら、見えないタブを切り替える
+    observeEvent(input$isIC_I, {
+        updateTabsetPanel(inputId = "tab4core", selected = ifelse(input$isIC_I, "true", "false"))
+    })
+
     output$distPlot <- renderPlot({
-        # inputにはwithが使えない
+        # inputはReactiveValuesクラスで$で参照できる変数を陽に持たないため、withやattachが使えない
         drawEdgeworthBox(input$A, input$B, CC=input$isCC, SHP=input$isSHP, IC_I=input$isIC_I,
             IC_E=input$isIC_E, CORE=input$isCore, IP=input$isIP)
     }, width=500, height=500)