From bd707ec0a0662afab524ec9deaf833a0f6cc54ba Mon Sep 17 00:00:00 2001
From: DaPi <info@danielpichler.com>
Date: Sat, 12 Oct 2024 22:24:03 +0200
Subject: [PATCH] Disable DElButton when nothing to delete

---
 .../Converter/IntBoolConverter.cs             | 25 +++++++++++++++++++
 Jugenddienst Stunden/Views/StundePage.xaml    |  9 ++++++-
 2 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 Jugenddienst Stunden/Converter/IntBoolConverter.cs

diff --git a/Jugenddienst Stunden/Converter/IntBoolConverter.cs b/Jugenddienst Stunden/Converter/IntBoolConverter.cs
new file mode 100644
index 0000000..b6c2bbe
--- /dev/null
+++ b/Jugenddienst Stunden/Converter/IntBoolConverter.cs	
@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Jugenddienst_Stunden.Converter;
+public class IntBoolConverter : IValueConverter {
+
+	public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture) {
+		if (value is int) {
+			return (int)value != 0;
+		}
+		return false;
+	}
+
+
+	public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture) {
+		if (value is bool) {
+			return (bool)value ? 1 : 0;
+		}
+		return 0;
+	}
+}
diff --git a/Jugenddienst Stunden/Views/StundePage.xaml b/Jugenddienst Stunden/Views/StundePage.xaml
index 02ae56c..e7588d7 100644
--- a/Jugenddienst Stunden/Views/StundePage.xaml	
+++ b/Jugenddienst Stunden/Views/StundePage.xaml	
@@ -2,6 +2,7 @@
 <ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
              xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
              xmlns:models="clr-namespace:Jugenddienst_Stunden.ViewModels"
+             xmlns:conv="clr-namespace:Jugenddienst_Stunden.Converter"
              x:Class="Jugenddienst_Stunden.Views.StundePage"
              Title="{Binding Title}">
 
@@ -9,6 +10,12 @@
         <models:StundeViewModel />
     </ContentPage.BindingContext>
 
+    <ContentPage.Resources>
+        <ResourceDictionary>
+            <conv:IntBoolConverter x:Key="IntBoolConverter" />
+        </ResourceDictionary>
+    </ContentPage.Resources>
+
     <VerticalStackLayout Spacing="10" Margin="10">
         
         <Label Text="{Binding SubTitle}" />
@@ -43,7 +50,7 @@
 
         <Grid ColumnDefinitions="*,*" ColumnSpacing="4">
             <Button Text="Speichern" Command="{Binding SaveCommand}" />
-            <Button Grid.Column="1" Text="Löschen" Command="{Binding DeleteConfirmCommand}" />
+            <Button Grid.Column="1" Text="Löschen" Command="{Binding DeleteConfirmCommand}" IsEnabled="{Binding Stunde.id, Converter={StaticResource IntBoolConverter}}" />
         </Grid>
         
         <BoxView HeightRequest="1" Color="Red" Margin="5,10"/>