worked on settings for NewlineSeparator in menubar,

updating binded datasource does not yet work

MultiTerm.Core/Common/NewlineSeparatorType.cs

@@ -0,0 +1,30 @@
+using System.ComponentModel;
+
+namespace MultiTerm.Core.Common;
+
+public enum NewlineSeparatorType
+{
+    /// <summary>
+    /// No newline separator.
+    /// </summary>
+    [Description("None")]
+    None,
+
+    /// <summary>
+    /// Carriage return newline separator.
+    /// </summary>
+    [Description("CR")]
+    CR,
+
+    /// <summary>
+    /// Linefeed newline separator.
+    /// </summary>
+    [Description("LF")]
+    LF,
+
+    /// <summary>
+    /// Carriage return and linefeed as newline separator.
+    /// </summary>
+    [Description("CR+LF")]
+    CR_LF
+}

MultiTerm.Core/ViewModel/ShellViewModel.cs

@@ -1,6 +1,9 @@
 using Common.StartupHelpers;
 using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using MultiTerm.Core.Common;
 using System.Collections.ObjectModel;
+using System.Runtime.CompilerServices;
 
 namespace MultiTerm.Core.ViewModel;
 
@@ -17,6 +20,21 @@ public partial class ShellViewModel : ObservableObject
     [ObservableProperty]
     private ITerminalViewModel? selectedTerminalViewModel;
 
+    #region Settings Menu Bar
+    public IEnumerable<NewlineSeparatorType> NewlineSeparatorTypeValues
+    {
+        get { return Enum.GetValues(typeof(NewlineSeparatorType)).Cast<NewlineSeparatorType>(); }
+    }
+
+    // TODO Initialize from File
+    [ObservableProperty]
+    private NewlineSeparatorType selectedReceiveNewlineSeparator = NewlineSeparatorType.None;
+
+    // TODO Initialize from File
+    [ObservableProperty]
+    private NewlineSeparatorType selectedSendNewlineSeparator = NewlineSeparatorType.None;
+    #endregion
+
     public ShellViewModel(IAbstractFactory<SendReceiveViewModel> sendReceiveViewModelFactory)
     {
         this.sendReceiveViewModelFactory = sendReceiveViewModelFactory;
@@ -35,4 +53,10 @@ public partial class ShellViewModel : ObservableObject
         this.TerminalViewModels.Add(newTerminal);
         this.SelectedTerminalViewModel = newTerminal;
     }
+
+    partial void OnSelectedReceiveNewlineSeparatorChanged(NewlineSeparatorType value)
+    {
+        Console.WriteLine($"Changed to {value}");
+    }
+
 }

MultiTerm.Wpf/Controls/MenuItemExtensions.cs

@@ -0,0 +1,106 @@
+using System;
+using System.Collections.Generic;
+using System.Windows;
+using System.Windows.Controls;
+
+namespace MultiTerm.Wpf.Controls
+{
+    /// <summary>
+    /// TODO ueberarbeiten
+    /// FROM:
+    /// https://stackoverflow.com/questions/3652688/mutually-exclusive-checkable-menu-items/11497189#11497189
+    /// </summary>
+    public class MenuItemExtensions : MenuItem
+    {
+        private static MenuItem? previouslySelectedMenuItem = null;
+        public static Dictionary<MenuItem, String> ElementToGroupNames = new Dictionary<MenuItem, String>();
+
+        public static readonly DependencyProperty GroupNameProperty =
+            DependencyProperty.RegisterAttached("GroupName",
+                typeof(String),
+                typeof(MenuItemExtensions),
+                new PropertyMetadata(String.Empty, OnGroupNameChanged));
+
+        public static readonly RoutedEvent IsCheckedChangedEvent =
+            EventManager.RegisterRoutedEvent("IsCheckedChanged",
+                RoutingStrategy.Bubble, typeof(RoutedEventArgs),
+                typeof(MenuItemExtensions));
+
+        public event RoutedEventHandler IsCheckedChanged
+        {
+            add { this.AddHandler(IsCheckedChangedEvent, value); }
+            remove { this.RemoveHandler(IsCheckedChangedEvent, value); }
+        }
+
+        public static void SetGroupName(MenuItem element, String value)
+        {
+            element.SetValue(GroupNameProperty, value);
+        }
+
+        public static String GetGroupName(MenuItem element)
+        {
+            return element.GetValue(GroupNameProperty).ToString();
+        }
+
+        private static void OnGroupNameChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            //Add an entry to the group name collection
+            var menuItem = d as MenuItem;
+            var parent = menuItem.Parent as MenuItem;
+
+            if (menuItem != null)
+            {
+                String newGroupName = e.NewValue.ToString();
+                String oldGroupName = e.OldValue.ToString();
+                if (String.IsNullOrEmpty(newGroupName))
+                {
+                    //Removing the toggle button from grouping
+                    RemoveCheckboxFromGrouping(menuItem);
+                }
+                else
+                {
+                    //Switching to a new group
+                    if (newGroupName != oldGroupName)
+                    {
+                        if (!String.IsNullOrEmpty(oldGroupName))
+                        {
+                            //Remove the old group mapping
+                            RemoveCheckboxFromGrouping(menuItem);
+                        }
+                        ElementToGroupNames.Add(menuItem, e.NewValue.ToString());
+                        menuItem.IsCheckable = true;
+                        menuItem.Checked += MenuItemChecked;
+                    }
+                }
+            }
+        }
+
+        private static void RemoveCheckboxFromGrouping(MenuItem checkBox)
+        {
+            ElementToGroupNames.Remove(checkBox);
+            checkBox.Checked -= MenuItemChecked;
+        }
+
+
+        static void MenuItemChecked(object sender, RoutedEventArgs e)
+        {
+            var menuItem = e.OriginalSource as MenuItem;
+            foreach (var item in ElementToGroupNames)
+            {
+                // uncheck all other menu items in group
+                if (item.Key != menuItem && item.Value == GetGroupName(menuItem))
+                {
+                    item.Key.IsChecked = false;
+                }
+            }
+            // raise routed event
+            var menuItemExtensions = menuItem as MenuItemExtensions;
+            if(previouslySelectedMenuItem != null && previouslySelectedMenuItem != menuItem)
+            {
+                RoutedEventArgs args = new RoutedEventArgs(IsCheckedChangedEvent);
+                menuItemExtensions.RaiseEvent(args);
+            }
+            previouslySelectedMenuItem = menuItem;
+        }
+    }
+}

MultiTerm.Wpf/Controls/SingleSelectSubMenu.cs

@@ -0,0 +1,124 @@
+using MultiTerm.Wpf.ValueConverters;
+using System.Linq;
+using System.Collections;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Diagnostics;
+using System.Globalization;
+using System.Runtime.CompilerServices;
+using System.Windows;
+using System.Windows.Controls;
+using System;
+using System.Printing;
+
+namespace MultiTerm.Wpf.Controls;
+
+public class SingleSelectSubMenu : MenuItem
+{
+    public static Dictionary<MenuItem, SingleSelectSubMenu> RegisteredSubItemsAndParent = new Dictionary<MenuItem, SingleSelectSubMenu>();
+
+    public static readonly DependencyProperty OptionsSourceProperty =
+        DependencyProperty.Register("OptionsSource",
+        typeof(IEnumerable),
+        typeof(SingleSelectSubMenu),
+        new PropertyMetadata(null, OnOptionsSourceChanged));
+
+    public static readonly DependencyProperty SelectedMenuItemProperty =
+        DependencyProperty.Register("SelectedMenuItem",
+        typeof(object),
+        typeof(SingleSelectSubMenu),
+        new PropertyMetadata(null, OnSelectedMenuItemPropertyChanged));
+
+    private static void OnSelectedMenuItemPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+    {
+        var sssm = d as SingleSelectSubMenu;
+        if (sssm != null)
+        {
+            if(e.NewValue != null)
+            {
+                // get menu item with same name from registered items
+                MenuItem selectedMenuItem = null;
+                foreach (var item in RegisteredSubItemsAndParent)
+                {
+                    if(String.Compare(item.Key.Header.ToString(), e.NewValue.ToString(), true) == 0)
+                    {
+                        selectedMenuItem = item.Key;
+                        break;
+                    }
+                }
+               // var selectedMenuItem = RegisteredSubItemsAndParent.Where(x => x.Key.Header == e.NewValue).FirstOrDefault();
+                if(selectedMenuItem != null)
+                {
+                    selectedMenuItem.IsChecked = true;
+                    //OnAnyItemChecked(selectedMenuItem, new RoutedEventArgs());
+                }
+            }
+        }
+    }
+
+    private static void OnOptionsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+    {
+        var sssm = d as SingleSelectSubMenu;
+        if(sssm != null)
+        {
+            if(e.NewValue != null)
+            {
+                var parent = sssm.Parent as MenuItem;
+                if(parent != null)
+                {
+                    foreach (var item in (IEnumerable)e.NewValue)
+                    {
+                        var converter = new EnumDescriptionConverter();
+                        var newItem = new MenuItem()
+                        {
+                            Header = converter.Convert(item, typeof(object), null, CultureInfo.CurrentCulture),
+                            IsCheckable = true
+                        };
+                        newItem.Checked += OnAnyItemChecked;
+                        RegisteredSubItemsAndParent.Add(newItem, sssm);
+
+                        parent.Items.Add(newItem);
+                        Debug.WriteLine(item);
+                    }
+                }
+            }
+        }
+    }
+
+    private static void OnAnyItemChecked(object sender, RoutedEventArgs e)
+    {
+        var menuItem = sender as MenuItem;
+        if(menuItem != null)
+        {
+            Debug.WriteLine($"menuitem checked: {menuItem}");
+
+            // uncheck others
+            foreach (var item in RegisteredSubItemsAndParent)
+            {
+                if (item.Key != null && item.Key != menuItem)
+                {
+                    item.Key.IsChecked = false;
+                }
+            }
+
+            // set menu item for respective parent
+            RegisteredSubItemsAndParent[menuItem].SelectedMenuItem = menuItem;
+        }
+    }
+
+
+    [Bindable(true)]
+    public IEnumerable OptionsSource
+    {
+        get { return(IEnumerable)GetValue(OptionsSourceProperty); }
+        set { SetValue(OptionsSourceProperty, value); }
+    }
+
+
+    [Bindable(true)]
+    public object SelectedMenuItem
+    {
+        get { return GetValue(SelectedMenuItemProperty); }
+        set { SetValue (SelectedMenuItemProperty, value); }
+    }
+}

MultiTerm.Wpf/MainWindow.xaml

@@ -7,6 +7,8 @@
         xmlns:vm="clr-namespace:MultiTerm.Core.ViewModel;assembly=MultiTerm.Core"
         xmlns:v="clr-namespace:MultiTerm.Wpf.View"
         mc:Ignorable="d"
-        Title="MultiTerm" Height="450" Width="800">
+        Height="900" Width="1600"
+        MinHeight="900" MinWidth="1600"
+        Title="MultiTerm">
     <v:ShellView/>
 </Window>

MultiTerm.Wpf/ValueConverters/EnumDescriptionConverter.cs

@@ -0,0 +1,60 @@
+using System;
+using System.ComponentModel;
+using System.Globalization;
+using System.Reflection;
+using System.Windows.Data;
+
+namespace MultiTerm.Wpf.ValueConverters;
+
+public class EnumDescriptionConverter : IValueConverter
+{
+    private string GetEnumDescription(Enum enumObject)
+    {
+        FieldInfo fieldInfo = enumObject.GetType().GetField(enumObject.ToString());
+        object[] attributeArray = fieldInfo.GetCustomAttributes(false);
+        if(attributeArray.Length == 0)
+        {
+            return enumObject.ToString();
+        }
+        else
+        {
+            DescriptionAttribute attribute = attributeArray[0] as DescriptionAttribute;
+            return attribute.Description;
+        }
+    }
+
+    /// <summary>
+    /// Convert from Data Source to Dependency Object type.
+    /// Here => Enum type to object.
+    /// </summary>
+    /// <param name="value"></param>
+    /// <param name="targetType"></param>
+    /// <param name="parameter"></param>
+    /// <param name="culture"></param>
+    /// <returns></returns>
+    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+    {
+        Enum myEnum = (Enum)value;
+        string description = this.GetEnumDescription(myEnum);
+        return description;
+    }
+
+    /// <summary>
+    /// Convert from Dependency Object type to Data Source type.
+    /// Here => object to Enum type.
+    /// </summary>
+    /// <param name="value"></param>
+    /// <param name="targetType"></param>
+    /// <param name="parameter"></param>
+    /// <param name="culture"></param>
+    /// <returns></returns>
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+    {
+        int returnValue = 0;
+        if (parameter is Type)
+        {
+            returnValue = (int)Enum.Parse((Type)parameter, value.ToString());
+        }
+        return returnValue;
+    }
+}

MultiTerm.Wpf/View/ShellView.xaml

@@ -3,12 +3,69 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
-             xmlns:local="clr-namespace:MultiTerm.Wpf.View"
+             xmlns:sys="clr-namespace:System;assembly=System.Core"
+             xmlns:conv="clr-namespace:MultiTerm.Wpf.ValueConverters"
+             xmlns:controls="clr-namespace:MultiTerm.Wpf.Controls"
              xmlns:vm="clr-namespace:MultiTerm.Core.ViewModel;assembly=MultiTerm.Core"
              xmlns:v="clr-namespace:MultiTerm.Wpf.View"
+             xmlns:core_common="clr-namespace:MultiTerm.Core.Common;assembly=MultiTerm.Core"
              mc:Ignorable="d" 
-             d:DesignHeight="450" d:DesignWidth="800">
-    <Grid>
+             d:DesignHeight="600" d:DesignWidth="1200">
+    <UserControl.Resources>
+        <!-- Value Converters -->
+        <conv:EnumDescriptionConverter x:Key="EnumDescriptionConverter"/>
+
+    </UserControl.Resources>
+
+    <DockPanel>
+        <Menu DockPanel.Dock="Top">
+            <MenuItem Header="_File"/>
+            <MenuItem Header="_Edit">
+                <MenuItem Header="_Copy" InputGestureText="Ctrl + C">
+                    <!-- <MenuItem.Icon>  // TODO 
+                       <Image Width="16" Height="16" Source="copy.png"/> 
+                    </MenuItem.Icon>-->
+                </MenuItem>
+                <MenuItem Header="_Paste" InputGestureText="Ctrl + P">
+                    <!-- <MenuItem.Icon>  // TODO 
+                       <Image Width="16" Height="16" Source="paste.png"/> 
+                    </MenuItem.Icon>-->
+                </MenuItem>
+            </MenuItem>
+            <MenuItem Header="Test">
+                <MenuItem Header="Item1">
+                    <controls:MenuItemExtensions.GroupName>test</controls:MenuItemExtensions.GroupName>
+                    <MenuItem.IsCheckable>true</MenuItem.IsCheckable>
+                </MenuItem>
+                <MenuItem controls:MenuItemExtensions.GroupName="test" Header="Item2" IsCheckable="true"/>
+            </MenuItem>
+            <MenuItem Header="_Settings">
+                <controls:SingleSelectSubMenu Header="Newline Separator (Receive) TEST"
+                          OptionsSource="{Binding NewlineSeparatorTypeValues}"
+                          SelectedMenuItem="{Binding Path=SelectedReceiveNewlineSeparator, Converter={StaticResource EnumDescriptionConverter}}">
+                </controls:SingleSelectSubMenu>
+                <!--<MenuItem Header="Newline Separator (Receive)"
+                          ItemsSource="{Binding NewlineSeparatorTypeValues}">
+                    --><!--<controls:RadioButtonMenuItem.ItemTemplate>
+                        <DataTemplate>
+                            <TextBlock Text="{Binding Converter={StaticResource EnumDescriptionConverter}}"/>
+                        </DataTemplate>
+                    </controls:RadioButtonMenuItem.ItemTemplate>--><!--
+                    <MenuItem.ItemContainerStyle>
+                        <Style TargetType="{x:Type MenuItem}">
+                            <Setter Property="IsCheckable" Value="True"/>
+                            <Setter Property=""
+                            --><!--<Setter Property="GroupName" Value="receive"/>--><!--
+                            <Setter Property="Header" Value="{Binding Converter={StaticResource EnumDescriptionConverter}}"/>
+                        </Style>
+                    </MenuItem.ItemContainerStyle>
+                </MenuItem>-->
+
+                <MenuItem Header="Newline Separator On Send" x:Name="newlineSendMenuItem"/>
+            </MenuItem>
+            <MenuItem Header="_View"/>
+            <MenuItem Header="_About"/>
+        </Menu>
         <TabControl
             x:Name="terminalTabControl"
             ItemsSource="{Binding TerminalViewModels}"
@@ -27,5 +84,5 @@
             </TabControl.ItemContainerStyle>
 
         </TabControl>
-    </Grid>
+    </DockPanel>
 </UserControl>

MultiTerm.Wpf/View/ShellView.xaml.cs

@@ -1,4 +1,7 @@
-using MultiTerm.Core.ViewModel;
+using MultiTerm.Core.Common;
+using MultiTerm.Core.ViewModel;
+using System;
+using System.Linq;
 using System.Windows.Controls;
 
 namespace MultiTerm.Wpf.View;
@@ -9,5 +12,21 @@ public partial class ShellView : UserControl
     {
         InitializeComponent();
         this.DataContext = App.AppHost!.Services.GetService(typeof(ShellViewModel));
+        this.PopulateSettingsNewlineSelectors();
+    }
+
+    private void PopulateSettingsNewlineSelectors()
+    {
+        //var types = Enum.GetValues(typeof(NewlineSeparatorType)).Cast<NewlineSeparatorType>();
+        //foreach (var newlineSeparatorType in types)
+        //{
+        //    this.newlineReceiveMenuItem.Items.Add(new MenuItem() { Header = newlineSeparatorType });
+        //    this.newlineSendMenuItem.Items.Add(new MenuItem() { Header = newlineSeparatorType });
+        //}
+    }
+
+    private void MenuItem_IsCheckedChanged(object sender, System.Windows.RoutedEventArgs e)
+    {
+        Console.WriteLine("changed");
     }
 }