feat: add map drawing

Client/Application/Services/NullToVisibilityConverter.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Data;
+
+namespace Client.Application.Services
+{
+    public class NullToVisibilityConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            var isCollapsedWhenNull = parameter == null ? false : true;
+            var nullVisibility = isCollapsedWhenNull ? Visibility.Collapsed : Visibility.Hidden;
+            return value == null ? nullVisibility : Visibility.Visible;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}