add some demos & styles

1. add window demo
2. add scrollviewer demo
3. add radiobutton style
4. fixed some bugs
5. add research project

HandyControlDemo/Service/DataService.cs

@@ -0,0 +1,52 @@
+using System.Collections.Generic;
+using System.Globalization;
+using HandyControlDemo.Data;
+using HandyControlDemo.Tools.Converter;
+
+namespace HandyControlDemo.Service
+{
+    public class DataService
+    {
+        public List<DemoDataModel> GetDemoDataList()
+        {
+            var list = new List<DemoDataModel>();
+            for (var i = 1; i <= 6; i++)
+            {
+                var dataList = new List<DemoDataModel>();
+                for (int j = 0; j < 3; j++)
+                {
+                    dataList.Add(new DemoDataModel
+                    {
+                        Index = j,
+                        IsSelected = j % 2 == 0,
+                        Name = $"SubName{j}",
+                        Type = (DemoType)j
+                    });
+                }
+                var model = new DemoDataModel
+                {
+                    Index = i,
+                    IsSelected = i % 2 == 0,
+                    Name = $"Name{i}",
+                    Type = (DemoType)i,
+                    DataList = dataList
+                };
+                list.Add(model);
+            }
+
+            return list;
+        }
+
+        public List<string> GetComboBoxDemoDataList()
+        {
+            var converter = new StringRepeatConverter();
+            var list = new List<string>();
+            for (var i = 1; i <= 9; i++)
+            {
+                list.Add(converter.Convert(Properties.Langs.Lang.Text, null, i, CultureInfo.CurrentCulture)?.ToString());
+            }
+
+            return list;
+        }
+    }
+}