[NUI][TEST] add multi Window dispose test

diff --git a/test/Tizen.NUI.Samples/Tizen.NUI.Samples/Samples/MultiWindowDisposeTest.cs.cs b/test/Tizen.NUI.Samples/Tizen.NUI.Samples/Samples/MultiWindowDisposeTest.cs.cs
new file mode 100755 (executable)
index 0000000..758f855
--- /dev/null
+++ b/test/Tizen.NUI.Samples/Tizen.NUI.Samples/Samples/MultiWindowDisposeTest.cs.cs
@@ -0,0 +1,130 @@
+/*
+ * Copyright(c) 2022 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+using global::System;
+using Tizen.NUI.BaseComponents;
+using Tizen.NUI.Components;
+using System.Collections.Generic;
+
+namespace Tizen.NUI.Samples
+{
+    public class MultiWindowDisposeTest : IExample
+    {
+        private Window mainWindow = null;
+        private const int maxSubWinNum = 3;
+        private const int maxNumViewNLayer = 3;
+        private const int maxWinSize = 600;
+        private const int minWinSize = 300;
+        private List<Window> subWinList = new List<Window>();
+
+        private Random rand = new Random();
+        private Timer timer = new Timer(9000);
+        private int toggle;
+
+        public void Activate()
+        {
+
+            Tizen.Log.Debug("NUITEST", "Activate()!");
+            mainWindow = NUIApplication.GetDefaultWindow();
+            mainWindow.BackgroundColor = Color.White;
+
+            addSeveralLayersAndViews(mainWindow);
+
+            timer.Tick += (s, e) =>
+            {
+                if (++toggle % 2 == 1)
+                {
+                    createSubWindows();
+                }
+                else
+                {
+                    disposeSubWindows();
+                }
+                return true;
+            };
+            timer.Start();
+        }
+
+        private void createSubWindows()
+        {
+            for (int i = 0; i < maxSubWinNum; i++)
+            {
+                var win = new Window();
+                win.WindowSize = new Size2D(rand.Next(minWinSize, maxWinSize), rand.Next(minWinSize, maxWinSize));
+                win.WindowPosition = new Position2D(rand.Next(0, minWinSize * 2), rand.Next(0, minWinSize * 2));
+                win.BackgroundColor = new Color((float)rand.Next(100, 255) / 255.0f, (float)rand.Next(100, 255) / 255.0f, (float)rand.Next(100, 255) / 255.0f, 0.6f);
+                win.SetOpaqueState(false);
+                addSeveralLayersAndViews(win);
+                subWinList.Add(win);
+            }
+        }
+
+        private void disposeSubWindows()
+        {
+            foreach (var win in subWinList)
+            {
+                if (win)
+                {
+                    win.Dispose();
+                }
+            }
+            subWinList.Clear();
+        }
+
+        private void addSeveralLayersAndViews(Window win)
+        {
+            for (int i = 0; i < maxNumViewNLayer; i++)
+            {
+
+                var root = new View()
+                {
+                    Layout = new LinearLayout()
+                    {
+                        LinearOrientation = LinearLayout.Orientation.Vertical,
+                        Padding = new Extents(10, 10, 10, 10),
+                    },
+                    BackgroundColor = new Color((float)rand.Next(100, 255) / 255.0f, (float)rand.Next(100, 255) / 255.0f, (float)rand.Next(100, 255) / 255.0f, 0.6f),
+                    WidthSpecification = LayoutParamPolicies.MatchParent,
+                    HeightSpecification = LayoutParamPolicies.MatchParent,
+                };
+
+                for (int j = 0; j < maxNumViewNLayer; j++)
+                {
+                    var child = new View()
+                    {
+                        BackgroundColor = new Color((float)rand.Next(100, 255) / 255.0f, (float)rand.Next(100, 255) / 255.0f, (float)rand.Next(100, 255) / 255.0f, 0.6f),
+                        WidthSpecification = LayoutParamPolicies.MatchParent,
+                    };
+                    root.Add(child);
+                }
+
+                var layer = new Layer();
+                layer.Add(root);
+                win.AddLayer(layer);
+            }
+        }
+
+        public void Deactivate()
+        {
+            timer.Stop();
+            timer.Dispose();
+
+            Tizen.Log.Debug("NUITEST", "Deactivate() dispose subWindow!");
+            disposeSubWindows();
+        }
+    }
+}