add unit test and finish operator test

BallanceTASEditor/UI/StyleConverter.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Windows;
+using System.Windows.Data;
+using System.Windows.Media;
+
+namespace BallanceTASEditor.UI {
+
+    public class AddItemConverter : IMultiValueConverter {
+        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture) {
+            try {
+                var textCount = values[0] as string;
+                var textFps = values[1] as string;
+
+                var count = int.Parse(textCount);
+                var fps = float.Parse(textFps);
+
+                if (count <= 0 || fps <= 0) return false;
+                return true;
+            } catch  {
+                return false;
+            }
+        }
+
+        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture) {
+            return null;
+        }
+    }
+
+    public class FPS2DeltaTimeConverter : IValueConverter {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture) {
+            var text = value as string;
+            if (text == null) return "0";
+
+            float data;
+            if (!float.TryParse(text, out data)) return "0";
+            return (1000f / data).ToString();
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) {
+            return null;
+        }
+    }
+}