Massennachricht hinzugefügt

Optik an die vom Android- und Webclient angepasst
Asynchrone Methoden verbessert

ChatController/Converter/BroadcastCheckBoxVisibilityMultiConverter.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+
+namespace ChatController.Converter
+{
+    public class BroadcastCheckBoxVisibilityMultiConverter : IMultiValueConverter
+    {
+        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
+        {
+            if(values.Length == 2 && values[0] is bool isInBroadcastMode && values[1] is bool isChatMessageInputGridVisible)
+            {
+                if(isInBroadcastMode)
+                {
+                    return isChatMessageInputGridVisible ? Visibility.Visible : Visibility.Hidden;
+                }
+
+                return Visibility.Collapsed;
+            }
+
+            return Visibility.Collapsed;
+        }
+
+        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}