Mitarbeitsnote-Aggregation (3.2)

Neuer Dialog berechnet aus den Sitzungs-Bewertungen je Schüler eine
Mitarbeitsnote (H1/H2/Gesamtjahr), mit editierbarer Aspekt-Gewichtung,
Trendanzeige und Übernahme als Grade (Category=Participation).

LehrerApp.Desktop/Views/Groups/ParticipationGradeDialog.axaml

@@ -0,0 +1,64 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:vm="clr-namespace:LehrerApp.Desktop.ViewModels.Groups"
+        x:Class="LehrerApp.Desktop.Views.Groups.ParticipationGradeDialog"
+        x:DataType="vm:ParticipationGradeDialogViewModel"
+        Title="Mitarbeitsnote berechnen"
+        Width="620" Height="620" MinWidth="480" MinHeight="360"
+        CanResize="True" WindowStartupLocation="CenterOwner">
+
+  <Grid RowDefinitions="Auto,Auto,Auto,*,Auto" Margin="24">
+
+    <TextBlock Grid.Row="0" Text="Mitarbeitsnote berechnen" FontSize="18" FontWeight="SemiBold"/>
+
+    <Grid Grid.Row="1" ColumnDefinitions="Auto,Auto,*" Margin="0,12,0,10">
+      <TextBlock Grid.Column="0" Text="Zeitraum:" VerticalAlignment="Center" Margin="0,0,8,0"/>
+      <ComboBox Grid.Column="1" ItemsSource="{Binding PeriodOptions}"
+                SelectedItem="{Binding SelectedPeriod}" MinWidth="180"/>
+    </Grid>
+
+    <StackPanel Grid.Row="2" Spacing="4" Margin="0,0,0,12">
+      <TextBlock Text="Gewichtung je Aspekt" FontSize="12" FontWeight="SemiBold" Opacity="0.6"/>
+      <ItemsControl ItemsSource="{Binding AspectWeights}">
+        <ItemsControl.ItemsPanel>
+          <ItemsPanelTemplate>
+            <WrapPanel Orientation="Horizontal"/>
+          </ItemsPanelTemplate>
+        </ItemsControl.ItemsPanel>
+        <ItemsControl.ItemTemplate>
+          <DataTemplate x:DataType="vm:AspectWeightItem">
+            <StackPanel Orientation="Horizontal" Spacing="6" Margin="0,0,16,4" VerticalAlignment="Center">
+              <TextBlock Text="{Binding Label}" VerticalAlignment="Center" FontSize="12"/>
+              <NumericUpDown Value="{Binding Weight}" Minimum="0" Maximum="10" Increment="0.1"
+                             FormatString="0.#" Width="80" ShowButtonSpinner="False"/>
+            </StackPanel>
+          </DataTemplate>
+        </ItemsControl.ItemTemplate>
+      </ItemsControl>
+    </StackPanel>
+
+    <DataGrid Grid.Row="3"
+              ItemsSource="{Binding Rows}"
+              AutoGenerateColumns="False"
+              IsReadOnly="True"
+              GridLinesVisibility="Horizontal"
+              CanUserReorderColumns="False"
+              CanUserResizeColumns="True">
+      <DataGrid.Columns>
+        <DataGridTextColumn Header="Schüler" Binding="{Binding Name}" Width="2*"/>
+        <DataGridTextColumn Header="Sitzungen" Binding="{Binding SessionCount}" Width="Auto"/>
+        <DataGridTextColumn Header="Ø Bewertung" Binding="{Binding AverageDisplay}" Width="Auto"/>
+        <DataGridTextColumn Header="Trend" Binding="{Binding TrendSymbol}" Width="Auto"/>
+        <DataGridTextColumn Header="Note" Binding="{Binding GradeDisplay}" Width="Auto"/>
+      </DataGrid.Columns>
+    </DataGrid>
+
+    <Grid Grid.Row="4" ColumnDefinitions="*,Auto,Auto" Margin="0,16,0,0">
+      <TextBlock Grid.Column="0" Text="{Binding StatusMessage}" Foreground="Green" FontSize="12"
+                 VerticalAlignment="Center"
+                 IsVisible="{Binding StatusMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+      <Button Grid.Column="1" Content="Als Noten übernehmen" Command="{Binding ApplyCommand}" Margin="0,0,8,0"/>
+      <Button Grid.Column="2" Content="Schließen" Click="OnClose"/>
+    </Grid>
+  </Grid>
+</Window>

LehrerApp.Desktop/Views/Groups/ParticipationGradeDialog.axaml.cs

@@ -0,0 +1,11 @@
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+
+namespace LehrerApp.Desktop.Views.Groups;
+
+public partial class ParticipationGradeDialog : Window
+{
+    public ParticipationGradeDialog() => InitializeComponent();
+
+    private void OnClose(object? sender, RoutedEventArgs e) => Close();
+}

LehrerApp.Desktop/Views/Groups/ParticipationTabView.axaml

@@ -10,14 +10,17 @@
     <Border Grid.Column="0"
             BorderBrush="{DynamicResource SystemControlForegroundBaseLowBrush}"
             BorderThickness="0,0,1,0">
-    <Grid RowDefinitions="Auto,*">
+    <Grid RowDefinitions="Auto,Auto,*">
 
       <StackPanel Grid.Row="0" Orientation="Horizontal" Spacing="6" Margin="10,10,10,6">
         <Button Content="＋ Sitzung" Command="{Binding AddSessionCommand}" HorizontalAlignment="Stretch"/>
         <Button Content="Schnell" Command="{Binding QuickInputCommand}"/>
       </StackPanel>
 
-      <ListBox Grid.Row="1"
+      <Button Grid.Row="1" Content="Ø Mitarbeitsnote" Command="{Binding ComputeGradeCommand}"
+              HorizontalAlignment="Stretch" Margin="10,0,10,6"/>
+
+      <ListBox Grid.Row="2"
                ItemsSource="{Binding Sessions}"
                SelectedItem="{Binding SelectedSession}"
                BorderThickness="0">

LehrerApp.Desktop/Views/Groups/ParticipationTabView.axaml.cs

@@ -1,7 +1,10 @@
 using Avalonia.Controls;
 using Avalonia.Controls.Templates;
 using Avalonia.Data;
+using LehrerApp.Core.Interfaces;
+using LehrerApp.Core.Services;
 using LehrerApp.Desktop.ViewModels.Groups;
+using Microsoft.Extensions.DependencyInjection;
 
 namespace LehrerApp.Desktop.Views.Groups;
 
@@ -20,6 +23,7 @@ public partial class ParticipationTabView : UserControl
             _vm = vm;
             vm.OnAddSession = ShowAddSessionDialog;
             vm.OnQuickInput = ShowQuickInputDialog;
+            vm.OnComputeGrade = ShowComputeGradeDialog;
             vm.Aspects.CollectionChanged += (_, _) => BuildColumns();
             vm.PropertyChanged += (_, pe) =>
             {
@@ -141,4 +145,22 @@ public partial class ParticipationTabView : UserControl
         if (owner is not null)
             await dialog.ShowDialog(owner);
     }
+
+    private async Task ShowComputeGradeDialog(ParticipationTabViewModel tabVm)
+    {
+        var dialogVm = new ParticipationGradeDialogViewModel(
+            App.Services.GetRequiredService<IParticipationSessionRepository>(),
+            App.Services.GetRequiredService<IParticipationRepository>(),
+            App.Services.GetRequiredService<IParticipationAspectRepository>(),
+            App.Services.GetRequiredService<IStudentRepository>(),
+            App.Services.GetRequiredService<IEnrollmentRepository>(),
+            App.Services.GetRequiredService<IGradeRepository>(),
+            App.Services.GetRequiredService<GradingService>(),
+            tabVm.GroupId, tabVm.SchoolYear, tabVm.GradingSystem);
+
+        var dialog = new ParticipationGradeDialog { DataContext = dialogVm };
+        var owner = TopLevel.GetTopLevel(this) as Window;
+        if (owner is not null)
+            await dialog.ShowDialog(owner);
+    }
 }