changed ui to a dialog

tui.lua

@@ -1,14 +1,47 @@
+--  requires
 local ltui        = require("ltui")
+local label       = ltui.label
+local button      = ltui.button
 local application = ltui.application
 local event       = ltui.event
 local rect        = ltui.rect
-local window      = ltui.window
+local inputdialog = ltui.inputdialog
-local demo        = application()
 
+-- the demo application
+local demo = application()
+
+-- init demo
 function demo:init()
+
+    -- init name
     application.init(self, "demo")
+
+    -- init background
     self:background_set("blue")
-    self:insert(window:new("window.main", rect {1, 1, self:width() - 1, self:height() - 1}, "main window", true))
+
+    -- init input dialog
+    self:insert(self:dialog_input(), {centerx = true, centery = true})
 end
 
+-- input dialog
+function demo:dialog_input()
+    local dialog_input = self._DIALOG_INPUT
+    if not dialog_input then
+        dialog_input = inputdialog:new("dialog.input", rect{0, 0, math.floor(self:width() / 2), math.floor(self:height() / 3)})
+        dialog_input:text():text_set("please input text:")
+        dialog_input:button_add("no", "< No >", function (v) dialog_input:quit() end)
+        dialog_input:button_add("yes", "< Yes >", function (v) dialog_input:quit() end)
+        self._DIALOG_INPUT = dialog_input
+    end
+    return dialog_input
+end
+
+-- on resize
+function demo:on_resize()
+    self:dialog_input():bounds_set(rect{0, 0, math.floor(self:width() / 2), math.floor(self:height() / 3)})
+    self:center(self:dialog_input(), {centerx = true, centery = true})
+    application.on_resize(self)
+end
+
+-- run demo
 demo:run()