add exit tip for mconfdialog

src/ltui/mconfdialog.lua

@@ -53,7 +53,10 @@ Pressing <Y> includes, <N> excludes. Enter <Esc> or <Back> to go back, <?> for H
         self:menuconf():on_event(event.command {"cm_back"})
         self:buttons():select(self:button("select"))
     end)
-    self:button_add("exit", "< Exit >", function (v, e) self:quit() end)
+    self:button_add("exit", "< Exit >", function (v, e)
+        self:show_exit([[Did you wish to save your new configuration?
+Pressing <Esc> to continue your configuration.]])
+    end)
     self:button_add("help", "< Help >", function (v, e) self:show_help() end)
     self:button_add("save", "< Save >", function (v, e) self:action_on(action.ac_on_save) end)
     self:buttons():select(self:button("select"))
@@ -262,6 +265,24 @@ function mconfdialog:searchdialog()
     return self._SEARCHDIALOG
 end
 
+-- get exit dialog
+function mconfdialog:exitdialog()
+    if not self._EXITDIALOG then
+        local exitdialog = textdialog:new("mconfdialog.exit", rect{0, 0, math.min(80, self:width() - 8), math.min(8, self:height())}, "")
+        exitdialog:background_set(self:frame():background())
+        exitdialog:frame():background_set("cyan")
+        exitdialog:button_add("Yes", "< Yes >", function (v)
+            self:action_on(action.ac_on_save)
+            self:quit()
+        end)
+        exitdialog:button_add("No", "< No >", function (v) self:quit() end)
+        exitdialog:option_set("scrollable", false)
+        exitdialog:button_select("Yes")
+        self._EXITDIALOG = exitdialog
+    end
+    return self._EXITDIALOG
+end
+
 -- search configs via the given text
 function mconfdialog:search(configs, text)
     local results = {}
@@ -340,6 +361,17 @@ function mconfdialog:show_result(text)
     end
 end
 
+-- show exit dialog
+function mconfdialog:show_exit(text)
+    local dialog_exit = self:exitdialog()
+    dialog_exit:text():text_set(text)
+    if not self:view("mconfdialog.exit") then
+        self:insert(dialog_exit, {centerx = true, centery = true})
+    else
+        self:select(dialog_exit)
+    end
+end
+
 -- on event
 function mconfdialog:on_event(e)