From c61c2e3fcdd0533ac7bcb745c5e8048499925fb8 Mon Sep 17 00:00:00 2001
From: Lorenz Stechauner <lorenz.stechauner@necronda.net>
Date: Wed, 9 Jul 2025 18:12:35 +0200
Subject: [PATCH] [#64] AreaComAdminWindow: Add dialog for modifying/deleting

---
 Elwig/Dialogs/AreaComModifyDialog.xaml    |  71 ++++++++++
 Elwig/Dialogs/AreaComModifyDialog.xaml.cs |  62 ++++++++
 Elwig/Services/AreaComService.cs          |   8 +-
 Elwig/Windows/AreaComAdminWindow.xaml     |   6 +-
 Elwig/Windows/AreaComAdminWindow.xaml.cs  | 164 ++++++++++++++--------
 5 files changed, 243 insertions(+), 68 deletions(-)
 create mode 100644 Elwig/Dialogs/AreaComModifyDialog.xaml
 create mode 100644 Elwig/Dialogs/AreaComModifyDialog.xaml.cs

diff --git a/Elwig/Dialogs/AreaComModifyDialog.xaml b/Elwig/Dialogs/AreaComModifyDialog.xaml
new file mode 100644
index 0000000..31dd20d
--- /dev/null
+++ b/Elwig/Dialogs/AreaComModifyDialog.xaml
@@ -0,0 +1,71 @@
+<Window x:Class="Elwig.Dialogs.AreaComModifyDialog"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        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"
+        xmlns:local="clr-namespace:Elwig.Dialogs"
+        xmlns:ctrl="clr-namespace:Elwig.Controls"
+        ResizeMode="NoResize" ShowInTaskbar="False" Topmost="True"
+        WindowStartupLocation="CenterOwner"
+        DataContext="{Binding RelativeSource={RelativeSource Self}}"
+        Title="Flächenbindungen bearbeiten" Height="220" Width="450">
+    <Window.Resources>
+        <Style TargetType="Label">
+            <Setter Property="HorizontalAlignment" Value="Left"/>
+            <Setter Property="VerticalAlignment" Value="Top"/>
+            <Setter Property="Padding" Value="2,4,2,4"/>
+            <Setter Property="Height" Value="25"/>
+        </Style>
+        <Style TargetType="TextBox">
+            <Setter Property="HorizontalAlignment" Value="Stretch"/>
+            <Setter Property="VerticalAlignment" Value="Top"/>
+            <Setter Property="FontSize" Value="14"/>
+            <Setter Property="Padding" Value="2"/>
+            <Setter Property="Height" Value="25"/>
+            <Setter Property="TextWrapping" Value="NoWrap"/>
+        </Style>
+        <Style TargetType="Button">
+            <Setter Property="HorizontalAlignment" Value="Right"/>
+            <Setter Property="VerticalAlignment" Value="Bottom"/>
+            <Setter Property="Width" Value="100"/>
+            <Setter Property="Height" Value="25"/>
+        </Style>
+    </Window.Resources>
+    <Grid>
+        <TextBlock x:Name="QuestionBlock1" TextAlignment="Center" Margin="0,10,0,0"
+                   HorizontalAlignment="Center" VerticalAlignment="Top">
+            Soll die Flächenbindung (<Run Text="{Binding Area}"/> m², <Run Text="{Binding OrigYearFrom}"/>–<Run Text="{Binding OrigYearTo}"/>) rückwirkend bearbeitet werden,<LineBreak/>
+            oder erst ab der angegebenen Saison?
+        </TextBlock>
+        <TextBlock x:Name="QuestionBlock2" TextAlignment="Center" Margin="0,10,0,0" Visibility="Hidden"
+                   HorizontalAlignment="Center" VerticalAlignment="Top">
+            Soll die Flächenbindung (<Run Text="{Binding Area}"/> m², <Run Text="{Binding OrigYearFrom}"/>–<Run Text="{Binding OrigYearTo}"/>) rückwirkend gelöscht werden,<LineBreak/>
+            oder erst ab der angegebenen Saison?
+        </TextBlock>
+
+        <Label x:Name="SeasonLabel" Content="Saison:" Margin="0,50,100,0"
+               HorizontalAlignment="Center" VerticalAlignment="Top"/>
+        <ctrl:IntegerUpDown x:Name="SeasonInput" Width="56" Height="25" Margin="0,50,0,0" FontSize="14"
+                            Minimum="1900" Maximum="9999"
+                            HorizontalAlignment="Center" VerticalAlignment="Top"
+                            TextChanged="SeasonInput_TextChanged"/>
+        <CheckBox x:Name="RetroactiveInput" Content="Rückwirkend bearbeiten" Margin="0,80,0,0"
+                  HorizontalAlignment="Center" VerticalAlignment="Top"
+                  Checked="RetroactiveInput_Changed" Unchecked="RetroactiveInput_Changed"
+                  IsChecked="{Binding ModifyRetroactively}"/>
+
+        <TextBlock x:Name="DescBlock1" Margin="0,105,0,0" TextAlignment="Center"
+                   HorizontalAlignment="Center" VerticalAlignment="Top">
+            Die Flächenbindung bleibt bis inkl. Saison <Bold><Run x:Name="CancelSeason1"/></Bold> unverändert,<LineBreak/>
+            und wird ab inkl. Saison <Bold><Run x:Name="NewSeason1"/></Bold> in geänderter Form übernommen.
+        </TextBlock>
+        <TextBlock x:Name="DescBlock2" Margin="0,105,0,0" TextAlignment="Center" Visibility="Hidden"
+                   HorizontalAlignment="Center" VerticalAlignment="Top">
+            Die Flächenbindung bleibt bis inklusive Saison <Bold><Run x:Name="CancelSeason2"/></Bold> gültig.
+        </TextBlock>
+
+        <Button x:Name="ConfirmButton" Content="Bestätigen" Margin="10,10,115,10" Grid.Column="1"
+                Click="ConfirmButton_Click"/>
+        <Button x:Name="CancelButton" Content="Abbrechen" Margin="10,10,10,10" Grid.Column="1" IsCancel="True"/>
+    </Grid>
+</Window>
diff --git a/Elwig/Dialogs/AreaComModifyDialog.xaml.cs b/Elwig/Dialogs/AreaComModifyDialog.xaml.cs
new file mode 100644
index 0000000..0c2da99
--- /dev/null
+++ b/Elwig/Dialogs/AreaComModifyDialog.xaml.cs
@@ -0,0 +1,62 @@
+using Elwig.Helpers;
+using System.Windows;
+using System.Windows.Controls;
+
+namespace Elwig.Dialogs {
+    public partial class AreaComModifyDialog : Window {
+
+        public int? YearTo { get; set; }
+        public bool ModifyRetroactively { get; set; }
+
+        public string OrigYearFrom { get; set; }
+        public string OrigYearTo { get; set; }
+        public string Area { get; set; }
+
+        public AreaComModifyDialog(int? yearFrom, int? yearTo, int area, bool delete) {
+            Area = $"{area:N0}";
+            OrigYearFrom = $"{yearFrom}";
+            OrigYearTo = $"{yearTo}";
+            InitializeComponent();
+            Title = delete ? "Flächenbindung löschen" : "Flächenbindung bearbeiten";
+            RetroactiveInput.Content = delete ? "Rückwirkend löschen" : "Rückwirkend bearbeiten";
+            if (delete) {
+                QuestionBlock1.Visibility = Visibility.Hidden;
+                QuestionBlock2.Visibility = Visibility.Visible;
+                DescBlock1.Visibility = Visibility.Hidden;
+                DescBlock2.Visibility = Visibility.Visible;
+            }
+            if ((yearTo.HasValue && yearTo < Utils.CurrentNextSeason) || (yearFrom.HasValue && yearFrom >= Utils.CurrentNextSeason)) {
+                RetroactiveInput.IsChecked = true;
+            } else {
+                SeasonInput.Text = $"{Utils.CurrentNextSeason}";
+            }
+        }
+
+        private void SeasonInput_TextChanged(object sender, TextChangedEventArgs evt) {
+            YearTo = SeasonInput.Value! - 1;
+            CancelSeason1.Text = $"{YearTo}";
+            CancelSeason2.Text = $"{YearTo}";
+            NewSeason1.Text = $"{YearTo + 1}";
+        }
+
+        private void RetroactiveInput_Changed(object sender, RoutedEventArgs evt) {
+            if (ModifyRetroactively) {
+                SeasonInput.IsEnabled = false;
+                SeasonInput.Text = "";
+                YearTo = null;
+                DescBlock1.Visibility = Visibility.Hidden;
+                DescBlock2.Visibility = Visibility.Hidden;
+            } else {
+                SeasonInput.IsEnabled = true;
+                SeasonInput.Text = $"{Utils.CurrentNextSeason}";
+                DescBlock1.Visibility = QuestionBlock1.Visibility;
+                DescBlock2.Visibility = QuestionBlock2.Visibility;
+            }
+        }
+
+        private void ConfirmButton_Click(object sender, RoutedEventArgs evt) {
+            DialogResult = true;
+            Close();
+        }
+    }
+}
diff --git a/Elwig/Services/AreaComService.cs b/Elwig/Services/AreaComService.cs
index 403c2d6..1e32b44 100644
--- a/Elwig/Services/AreaComService.cs
+++ b/Elwig/Services/AreaComService.cs
@@ -106,13 +106,13 @@ namespace Elwig.Services {
         }
 
         public static async Task<int> UpdateAreaCommitment(this AreaComAdminViewModel vm, int? oldFbNr) {
-            int newFbNr = (int)vm.FbNr!;
+            int newFbNr = vm.FbNr!.Value;
 
             return await Task.Run(async () => {
                 using var ctx = new AppDbContext();
                 var a = new AreaCom {
                     FbNr = oldFbNr ?? newFbNr,
-                    MgNr = (int)vm.MgNr!,
+                    MgNr = vm.MgNr!.Value,
                     YearFrom = vm.YearFrom,
                     YearTo = vm.YearTo,
                     VtrgId = vm.AreaComType!.VtrgId,
@@ -120,8 +120,8 @@ namespace Elwig.Services {
                     Comment = string.IsNullOrEmpty(vm.Comment) ? null : vm.Comment,
                     KgNr = vm.Kg!.KgNr,
                     RdNr = vm.Rd?.RdNr,
-                    GstNr = vm.GstNr!.Trim(),
-                    Area = (int)vm.Area!,
+                    GstNr = vm.GstNr?.Trim() ?? "-",
+                    Area = vm.Area!.Value,
                 };
 
                 if (vm.Rd?.RdNr == 0) {
diff --git a/Elwig/Windows/AreaComAdminWindow.xaml b/Elwig/Windows/AreaComAdminWindow.xaml
index 5de24c5..ca57ce7 100644
--- a/Elwig/Windows/AreaComAdminWindow.xaml
+++ b/Elwig/Windows/AreaComAdminWindow.xaml
@@ -153,19 +153,19 @@
                 </Button.ToolTip>
             </Button>
 
-            <Button x:Name="AreaCommitmentSaveButton" Content="Speichern" Click="AreaCommitmentSaveButton_Click" IsEnabled="False" Visibility="Hidden"
+            <Button x:Name="SaveButton" Content="Speichern" Click="SaveButton_Click" IsEnabled="False" Visibility="Hidden"
                     HorizontalAlignment="Stretch" VerticalAlignment="Bottom" Margin="5,5,2.5,10" Grid.Column="0" Grid.Row="2">
                 <Button.ToolTip>
                     <TextBlock FontWeight="Bold">Strg+S</TextBlock>
                 </Button.ToolTip>
             </Button>
-            <Button x:Name="AreaCommitmentResetButton" Content="Zurücksetzen" Click="AreaCommitmentResetButton_Click" IsEnabled="False" Visibility="Hidden"
+            <Button x:Name="ResetButton" Content="Zurücksetzen" Click="ResetButton_Click" IsEnabled="False" Visibility="Hidden"
                     HorizontalAlignment="Stretch" VerticalAlignment="Bottom" Margin="2.5,5,2.5,10" Grid.Column="1" Grid.Row="2">
                 <Button.ToolTip>
                     <TextBlock FontWeight="Bold">Strg+Z</TextBlock>
                 </Button.ToolTip>
             </Button>
-            <Button x:Name="AreaCommitmentCancelButton" Content="Abbrechen" Click="AreaCommitmentCancelButton_Click" IsEnabled="False" Visibility="Hidden" IsCancel="True"
+            <Button x:Name="CancelButton" Content="Abbrechen" Click="CancelButton_Click" IsEnabled="False" Visibility="Hidden" IsCancel="True"
                     HorizontalAlignment="Stretch" VerticalAlignment="Bottom" Margin="2.5,5,5,10" Grid.Column="2" Grid.Row="2">
                 <Button.ToolTip>
                     <TextBlock FontWeight="Bold">Esc</TextBlock>
diff --git a/Elwig/Windows/AreaComAdminWindow.xaml.cs b/Elwig/Windows/AreaComAdminWindow.xaml.cs
index 77b0f6b..ac7bd58 100644
--- a/Elwig/Windows/AreaComAdminWindow.xaml.cs
+++ b/Elwig/Windows/AreaComAdminWindow.xaml.cs
@@ -1,13 +1,14 @@
-using Microsoft.EntityFrameworkCore;
-using System.Linq;
-using System.Windows;
-using System.Windows.Controls;
+using Elwig.Dialogs;
 using Elwig.Helpers;
 using Elwig.Models.Entities;
-using System;
-using System.Threading.Tasks;
-using Elwig.ViewModels;
 using Elwig.Services;
+using Elwig.ViewModels;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
 using System.Windows.Input;
 
 namespace Elwig.Windows {
@@ -25,8 +26,8 @@ namespace Elwig.Windows {
             ViewModel.Title = $"Flächenbindungen - {ViewModel.FilterMember.AdministrativeName} - Elwig";
             ExemptInputs = [
                 MgNrInput, AreaCommitmentList, NewAreaCommitmentButton, 
-                EditAreaCommitmentButton, DeleteAreaCommitmentButton, AreaCommitmentSaveButton,
-                AreaCommitmentResetButton, AreaCommitmentCancelButton, SearchInput, ActiveAreaCommitmentInput
+                EditAreaCommitmentButton, DeleteAreaCommitmentButton, SaveButton,
+                ResetButton, CancelButton, SearchInput, ActiveAreaCommitmentInput
             ];
             RequiredInputs = [
                 FbNrInput, YearFromInput, KgInput, RdInput,
@@ -163,8 +164,8 @@ namespace Elwig.Windows {
             IsCreating = true;
             AreaCommitmentList.IsEnabled = false;
             AreaCommitmentList.SelectedItem = null;
-            HideAreaCommitmentNewEditDeleteButtons();
-            ShowAreaCommitmentSaveResetCancelButtons();
+            HideNewEditDeleteButtons();
+            ShowSaveResetCancelButtons();
             UnlockInputs();
             await InitInputs();
             LockSearchInputs();
@@ -184,8 +185,8 @@ namespace Elwig.Windows {
             IsEditing = true;
             AreaCommitmentList.IsEnabled = false;
 
-            HideAreaCommitmentNewEditDeleteButtons();
-            ShowAreaCommitmentSaveResetCancelButtons();
+            HideNewEditDeleteButtons();
+            ShowSaveResetCancelButtons();
             UnlockInputs();
             LockSearchInputs();
         }
@@ -199,42 +200,81 @@ namespace Elwig.Windows {
         private async void DeleteAreaCommitmentButton_Click(object? sender, RoutedEventArgs? evt) {
             if (AreaCommitmentList.SelectedItem is not AreaCom a)
                 return;
-            var r = MessageBox.Show(
-                $"Soll die Flächenbindung {a.GstNr} ({a.Area} m²) wirklich unwiderruflich gelöscht werden?",
-                "Flächenbindung löschen", MessageBoxButton.OKCancel, MessageBoxImage.Warning, MessageBoxResult.Cancel);
-            if (r == MessageBoxResult.OK) {
-                Mouse.OverrideCursor = Cursors.Wait;
-                try {
+
+            var d = new AreaComModifyDialog(a.YearFrom, a.YearTo, a.Area, true);
+            if (d.ShowDialog() != true)
+                return;
+
+            Mouse.OverrideCursor = Cursors.Wait;
+            try {
+                if (d.YearTo is int yearTo) {
+                    ViewModel.YearTo = yearTo;
+                    await ViewModel.UpdateAreaCommitment((AreaCommitmentList.SelectedItem as AreaCom)?.FbNr);
+                } else {
                     await AreaComService.DeleteAreaCom(a.FbNr);
-                    App.HintContextChange();
-                } catch (Exception exc) {
-                    var str = "Der Eintrag konnte nicht in der Datenbank aktualisiert werden!\n\n" + exc.Message;
-                    if (exc.InnerException != null) str += "\n\n" + exc.InnerException.Message;
-                    MessageBox.Show(str, "Flächenbindung löschen", MessageBoxButton.OK, MessageBoxImage.Error);
                 }
-                Mouse.OverrideCursor = null;
+                App.HintContextChange();
+            } catch (Exception exc) {
+                var str = "Der Eintrag konnte nicht in der Datenbank aktualisiert werden!\n\n" + exc.Message;
+                if (exc.InnerException != null) str += "\n\n" + exc.InnerException.Message;
+                MessageBox.Show(str, "Flächenbindung löschen", MessageBoxButton.OK, MessageBoxImage.Error);
             }
+            Mouse.OverrideCursor = null;
         }
 
         protected override void ShortcutSave() {
-            if (!AreaCommitmentSaveButton.IsEnabled || AreaCommitmentSaveButton.Visibility != Visibility.Visible)
+            if (!SaveButton.IsEnabled || SaveButton.Visibility != Visibility.Visible)
                 return;
-            AreaCommitmentSaveButton_Click(null, null);
+            SaveButton_Click(null, null);
         }
 
-        private async void AreaCommitmentSaveButton_Click(object? sender, RoutedEventArgs? evt) {
-            AreaCommitmentSaveButton.IsEnabled = false;
-            Mouse.OverrideCursor = Cursors.Wait;
+        private async void SaveButton_Click(object? sender, RoutedEventArgs? evt) {
+            SaveButton.IsEnabled = false;
+
+            int? yearTo = null;
+            if (InputHasChanged(AreaInput) || InputHasChanged(AreaComTypeInput)) {
+                var a = (AreaCommitmentList.SelectedItem as AreaCom)!;
+                var d = new AreaComModifyDialog(a.YearFrom, a.YearTo, a.Area, false);
+                if (d.ShowDialog() != true)
+                    return;
+                yearTo = d.YearTo;
+            }
 
             int fbnr;
+            Mouse.OverrideCursor = Cursors.Wait;
             try {
+                AreaCom? temp = null;
+                if (yearTo != null && (!ViewModel.YearTo.HasValue || yearTo < ViewModel.YearTo)) {
+                    temp = new AreaCom {
+                        FbNr = ViewModel.FbNr!.Value,
+                        MgNr = ViewModel.MgNr!.Value,
+                        YearFrom = ViewModel.YearFrom,
+                        YearTo = ViewModel.YearTo,
+                        VtrgId = ViewModel.AreaComType!.VtrgId,
+                        CultId = ViewModel.WineCult?.CultId,
+                        Comment = ViewModel.Comment,
+                        KgNr = ViewModel.Kg!.KgNr,
+                        RdNr = ViewModel.Rd?.RdNr,
+                        GstNr = ViewModel.GstNr?.Trim() ?? "-",
+                        Area = ViewModel.Area!.Value,
+                    };
+                    RefreshInputs();
+                    ViewModel.YearTo = yearTo;
+                }
                 fbnr = await ViewModel.UpdateAreaCommitment((AreaCommitmentList.SelectedItem as AreaCom)?.FbNr);
+                if (temp is AreaCom t) {
+                    await ViewModel.InitInputs();
+                    t.FbNr = ViewModel.FbNr!.Value;
+                    t.YearFrom = yearTo + 1;
+                    ViewModel.FillInputs(t);
+                    fbnr = await ViewModel.UpdateAreaCommitment(null);
+                }
                 App.HintContextChange();
             } catch (Exception exc) {
                 var str = "Der Eintrag konnte nicht in der Datenbank aktualisiert werden!\n\n" + exc.Message;
                 if (exc.InnerException != null) str += "\n\n" + exc.InnerException.Message;
                 MessageBox.Show(str, "Flächenbindung aktualisieren", MessageBoxButton.OK, MessageBoxImage.Error);
-                AreaCommitmentSaveButton.IsEnabled = true;
+                SaveButton.IsEnabled = true;
                 Mouse.OverrideCursor = null;
                 return;
             }
@@ -242,8 +282,8 @@ namespace Elwig.Windows {
             IsEditing = false;
             IsCreating = false;
             AreaCommitmentList.IsEnabled = true;
-            HideAreaCommitmentSaveResetCancelButtons();
-            ShowAreaCommitmentNewEditDeleteButtons();
+            HideSaveResetCancelButtons();
+            ShowNewEditDeleteButtons();
             LockInputs();
             UnlockSearchInputs();
             FinishInputFilling();
@@ -255,12 +295,12 @@ namespace Elwig.Windows {
         }
 
         protected override void ShortcutReset() {
-            if (!AreaCommitmentResetButton.IsEnabled || AreaCommitmentResetButton.Visibility != Visibility.Visible)
+            if (!ResetButton.IsEnabled || ResetButton.Visibility != Visibility.Visible)
                 return;
-            AreaCommitmentResetButton_Click(null, null);
+            ResetButton_Click(null, null);
         }
 
-        private async void AreaCommitmentResetButton_Click(object? sender, RoutedEventArgs? evt) {
+        private async void ResetButton_Click(object? sender, RoutedEventArgs? evt) {
             if (IsEditing) {
                 RefreshInputs();
             } else if (IsCreating) {
@@ -269,12 +309,12 @@ namespace Elwig.Windows {
             UpdateButtons();
         }
 
-        private void AreaCommitmentCancelButton_Click(object sender, RoutedEventArgs evt) {
+        private void CancelButton_Click(object sender, RoutedEventArgs evt) {
             IsEditing = false;
             IsCreating = false;
             AreaCommitmentList.IsEnabled = true;
-            HideAreaCommitmentSaveResetCancelButtons();
-            ShowAreaCommitmentNewEditDeleteButtons();
+            HideSaveResetCancelButtons();
+            ShowNewEditDeleteButtons();
             RefreshInputs();
             ClearInputStates();
             LockInputs();
@@ -284,49 +324,49 @@ namespace Elwig.Windows {
         override protected void UpdateButtons() {
             if (!IsEditing && !IsCreating) return;
             bool ch = HasChanged, v = IsValid;
-            AreaCommitmentResetButton.IsEnabled = (ch);
-            AreaCommitmentSaveButton.IsEnabled = (ch && v);
+            ResetButton.IsEnabled = (ch);
+            SaveButton.IsEnabled = (ch && v);
         }
 
-        private void DisableAreaCommitmentNewEditDeleteButtons() {
+        private void DisableNewEditDeleteButtons() {
             NewAreaCommitmentButton.IsEnabled = false;
             EditAreaCommitmentButton.IsEnabled = false;
             DeleteAreaCommitmentButton.IsEnabled = false;
         }
 
-        private void EnableAreaCommitmentNewEditDeleteButtons() {
+        private void EnableNewEditDeleteButtons() {
             NewAreaCommitmentButton.IsEnabled = true;
             EditAreaCommitmentButton.IsEnabled = AreaCommitmentList.SelectedItem != null;
             DeleteAreaCommitmentButton.IsEnabled = AreaCommitmentList.SelectedItem != null;
         }
 
-        private void ShowAreaCommitmentSaveResetCancelButtons() {
-            AreaCommitmentSaveButton.IsEnabled = false;
-            AreaCommitmentResetButton.IsEnabled = false;
-            AreaCommitmentCancelButton.IsEnabled = true;
-            AreaCommitmentSaveButton.Visibility = Visibility.Visible;
-            AreaCommitmentResetButton.Visibility = Visibility.Visible;
-            AreaCommitmentCancelButton.Visibility = Visibility.Visible;
+        private void ShowSaveResetCancelButtons() {
+            SaveButton.IsEnabled = false;
+            ResetButton.IsEnabled = false;
+            CancelButton.IsEnabled = true;
+            SaveButton.Visibility = Visibility.Visible;
+            ResetButton.Visibility = Visibility.Visible;
+            CancelButton.Visibility = Visibility.Visible;
         }
 
-        private void HideAreaCommitmentSaveResetCancelButtons() {
-            AreaCommitmentSaveButton.IsEnabled = false;
-            AreaCommitmentResetButton.IsEnabled = false;
-            AreaCommitmentCancelButton.IsEnabled = false;
-            AreaCommitmentSaveButton.Visibility = Visibility.Hidden;
-            AreaCommitmentResetButton.Visibility = Visibility.Hidden;
-            AreaCommitmentCancelButton.Visibility = Visibility.Hidden;
+        private void HideSaveResetCancelButtons() {
+            SaveButton.IsEnabled = false;
+            ResetButton.IsEnabled = false;
+            CancelButton.IsEnabled = false;
+            SaveButton.Visibility = Visibility.Hidden;
+            ResetButton.Visibility = Visibility.Hidden;
+            CancelButton.Visibility = Visibility.Hidden;
         }
 
-        private void ShowAreaCommitmentNewEditDeleteButtons() {
-            EnableAreaCommitmentNewEditDeleteButtons();
+        private void ShowNewEditDeleteButtons() {
+            EnableNewEditDeleteButtons();
             NewAreaCommitmentButton.Visibility = Visibility.Visible;
             EditAreaCommitmentButton.Visibility = Visibility.Visible;
             DeleteAreaCommitmentButton.Visibility = Visibility.Visible;
         }
 
-        private void HideAreaCommitmentNewEditDeleteButtons() {
-            DisableAreaCommitmentNewEditDeleteButtons();
+        private void HideNewEditDeleteButtons() {
+            DisableNewEditDeleteButtons();
             NewAreaCommitmentButton.Visibility = Visibility.Hidden;
             EditAreaCommitmentButton.Visibility = Visibility.Hidden;
             DeleteAreaCommitmentButton.Visibility = Visibility.Hidden;
@@ -343,6 +383,8 @@ namespace Elwig.Windows {
         }
 
         private void AreaCommitmentList_SelectionChanged(object sender, SelectionChangedEventArgs evt) {
+            if (AreaCommitmentList.SelectedItem != null)
+                AreaCommitmentList.ScrollIntoView(AreaCommitmentList.SelectedItem);
             RefreshInputs();
         }