[feat:] added "new file" button for wiki and therefore

implemented the usage of NamingWindow

MainWindow.axaml

@@ -257,9 +257,10 @@
                     <Grid ColumnDefinitions="300,*">
                         <Border Grid.Column="0" Background="#FFF" BorderBrush="#DDD" BorderThickness="0,0,1,0">
                             <StackPanel>
-                                <TextBlock Text="Wiki" FontSize="18" Margin="12" />
+                                <Button Content="+ Hinzufügen" Margin="10" x:Name="BtnWikiAddFile"
+                                        Click="BtnWikiAddFile_OnClick" />
                                 <ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
-                                    <TreeView Name="NavTree" Margin="8" />
+                                    <TreeView Name="NavTree" Margin="10" />
                                 </ScrollViewer>
                             </StackPanel>
                         </Border>

MainWindow.axaml.cs

@@ -15,11 +15,11 @@ public partial class MainWindow : Window
     public static MainWindow _instance;
 
     private Country _selectedCountry;
+    private string _selectedWikiFilePath;
     private bool _suppressCountryRefresh;
 
     private WikiService _wikiService;
     public Uri filePath;
-    private string _selectedWikiFilePath;
 
     public MainWindow()
     {
@@ -872,4 +872,19 @@ public partial class MainWindow : Window
                 new List<string> { countryie.ThreeLetterCode, countryie.TwoLetterCode }));
         RefreshCountryView();
     }
+
+    private async void BtnWikiAddFile_OnClick(object? sender, RoutedEventArgs e)
+    {
+        var result = await NamingWindow.Show(this);
+        if (result != null)
+            try
+            {
+                File.WriteAllText(Path.Combine(Global._instance.wiki_storage_path, result), "");
+                PopulateNavTree();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(this, ex.StackTrace, "Fehler");
+            }
+    }
 }

NamingWindow.axaml

@@ -0,0 +1,19 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+        x:Class="Logof_Client.NamingWindow"
+        Title="NamingWindow">
+    <StackPanel Orientation="Vertical">
+        <TextBlock Name="Text" Margin="10" TextWrapping="Wrap" />
+        <TextBox Name="Input" Margin="10" />
+        <StackPanel HorizontalAlignment="Right" Margin="5" Orientation="Horizontal" Name="Buttons">
+            <StackPanel.Styles>
+                <Style Selector="Button">
+                    <Setter Property="Margin" Value="5" />
+                </Style>
+            </StackPanel.Styles>
+        </StackPanel>
+    </StackPanel>
+</Window>

NamingWindow.axaml.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace Logof_Client;
+
+public partial class NamingWindow : Window
+{
+    public NamingWindow()
+    {
+        AvaloniaXamlLoader.Load(this);
+
+        //InitializeComponent();
+    }
+
+    public static Task<string> Show(Window parent, string input = "", string info = "Bitte geben Sie einen Namen ein:")
+    {
+        try
+        {
+            var wind = new NamingWindow
+            {
+                Title = "Name eingeben"
+            };
+            wind.FindControl<TextBlock>("Text").Text = info;
+            var buttonPanel = wind.FindControl<StackPanel>("Buttons");
+            var inputBox = wind.FindControl<TextBox>("Input");
+
+            inputBox.Text = input;
+            string res = null;
+
+            void AddButton(string caption)
+            {
+                var btn = new Button { Content = caption };
+                btn.Click += (_, __) =>
+                {
+                    res = inputBox.Text;
+                    wind.Close();
+                };
+                buttonPanel.Children.Add(btn);
+            }
+
+            AddButton("Ok");
+
+
+            var tcs = new TaskCompletionSource<string>();
+            wind.Closed += delegate { tcs.TrySetResult(res); };
+            if (parent != null)
+                wind.ShowDialog(parent);
+            else wind.Show();
+
+            return tcs.Task;
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine("Error while showing naming window: " + ex.Message);
+            return null;
+        }
+    }
+}