Generische Delegates

OOP2024_AMP.sln

@@ -37,7 +37,13 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "P15 GenericSort", "P15 Gene
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "P16 GenericKeyValueList", "P16 GenericKeyValueList\P16 GenericKeyValueList.csproj", "{43F7D344-EBBF-4672-9452-AE59A1C977BF}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "P17 Intro Delegates", "P17 Intro Delegates\P17 Intro Delegates.csproj", "{8E449A0E-B181-4E03-9BF5-732A32CF7A02}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "P17 Intro Delegates", "P17 Intro Delegates\P17 Intro Delegates.csproj", "{8E449A0E-B181-4E03-9BF5-732A32CF7A02}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "P18 Delegate Uebg", "P18 Delegate Uebg\P18 Delegate Uebg.csproj", "{0E2DADFD-9A74-499C-8B0F-8D5F05A0C890}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "P19 WPF_Demo", "P19 WPF_Demo\P19 WPF_Demo.csproj", "{5E98294F-B48D-4D2D-B26E-43B36AEAD46F}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "P20 Liste mit Delegate", "P20 Liste mit Delegate\P20 Liste mit Delegate.csproj", "{FF28F272-A827-4234-B95C-947C69D26349}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -117,6 +123,18 @@ Global
 		{8E449A0E-B181-4E03-9BF5-732A32CF7A02}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{8E449A0E-B181-4E03-9BF5-732A32CF7A02}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{8E449A0E-B181-4E03-9BF5-732A32CF7A02}.Release|Any CPU.Build.0 = Release|Any CPU
+		{0E2DADFD-9A74-499C-8B0F-8D5F05A0C890}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0E2DADFD-9A74-499C-8B0F-8D5F05A0C890}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0E2DADFD-9A74-499C-8B0F-8D5F05A0C890}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0E2DADFD-9A74-499C-8B0F-8D5F05A0C890}.Release|Any CPU.Build.0 = Release|Any CPU
+		{5E98294F-B48D-4D2D-B26E-43B36AEAD46F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{5E98294F-B48D-4D2D-B26E-43B36AEAD46F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{5E98294F-B48D-4D2D-B26E-43B36AEAD46F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{5E98294F-B48D-4D2D-B26E-43B36AEAD46F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{FF28F272-A827-4234-B95C-947C69D26349}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FF28F272-A827-4234-B95C-947C69D26349}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FF28F272-A827-4234-B95C-947C69D26349}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FF28F272-A827-4234-B95C-947C69D26349}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

P17 Intro Delegates/Program.cs

@@ -10,7 +10,7 @@
             double schrittweite, ZulaessigeFunktionen fkt)
         {
             for (double x = von; x <= bis ; x+= schrittweite)
-                Console.WriteLine(  $"{x:f8} | {fkt(x):f8}");
+                Console.WriteLine(  $"{x,8:f2} | {fkt(x),8:f2}");
             Console.WriteLine(  "------------");
         }
         static void Main(string[] args)
@@ -24,7 +24,7 @@
             ZulaessigeFunktionen meineFunktRef;
             meineFunktRef = Square;
             Console.WriteLine(meineFunktRef(10));
-            meineFunktRef = z => z + 10;
+            meineFunktRef += z => z + 10;
             Console.WriteLine(meineFunktRef(10));
         }
     }

P18 Delegate Uebg/P18 Delegate Uebg.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>P18_Delegate_Uebg</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

P18 Delegate Uebg/Program.cs

+namespace P18_Delegate_Uebg
+{
+    // 1) Erstellen Sie eine Methode PrintAll, die ein Feld eines
+    //    beliebigen Typs entgegennimmt und alle Feldelemente
+    //    in einer Zeile ausdruckt.
+    //
+    // 2) Erstellen Sie eine Methode ForAll, die eine Methode und 
+    //    ein Feld eines beliebigen Typs entgegennimmt (gerne auch 
+    //    per params) und die Methode auf alle Feldelemente anwendet
+    //    und das geänderte Feld zurückliefert.
+    //      ForAll(x=>x*x, 1,2,3,4,5)
+    //
+    // 3) Erstellen Sie eine Methode Select, die wiederum eine 
+    //    Methode und ein Feld eines beliebigen Typs entgegennimmt
+    //    und ein Ergebnisfeld zurückliefert, welches nur diejenigen
+    //    Feldelemente enthält, die den Kriterien der Filtermethode
+    //    entsprechen.
+    //      Select(x=>x%2==0, 1,2,3,4,5)
+    internal class Program
+    {
+        delegate T ChangeFn<T>(T x);
+        delegate bool FilterFn<T>(T x);
+
+        static int[] ForAll(ChangeFn<int> fn, params int[] array)
+        {
+            for (int i = 0; i < array.Length; i++)
+            {
+                array[i] = fn(array[i]);
+            }
+            return array;
+        }
+        //static T[] ForAll<T>(ChangeFn<T> fn, params T[] array)
+        //{
+
+        //}
+        static T[] Select<T>(FilterFn<T> fn, T[] array)
+        {
+            List<T> list = new List<T>();
+            list.Add(array[0]);
+            return list.ToArray();
+        }
+        static void Main(string[] args)
+        {
+            ForAll(x => x * x, 1, 2, 3, 4, 5);
+        }
+    }
+}

P19 WPF_Demo/App.xaml

+<Application x:Class="P19_WPF_Demo.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:P19_WPF_Demo"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+         
+    </Application.Resources>
+</Application>

P19 WPF_Demo/App.xaml.cs

+using System.Configuration;
+using System.Data;
+using System.Windows;
+
+namespace P19_WPF_Demo
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+
+}

P19 WPF_Demo/AssemblyInfo.cs

+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
+                                                //(used if a resource is not found in the page,
+                                                // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly   //where the generic resource dictionary is located
+                                                //(used if a resource is not found in the page,
+                                                // app, or any theme specific resource dictionaries)
+)]

P19 WPF_Demo/MainWindow.xaml

+<Window x:Class="P19_WPF_Demo.MainWindow"
+        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:P19_WPF_Demo"
+        mc:Ignorable="d"
+        Title="MainWindow" Height="450" Width="800">
+    <Grid>
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="77*"/>
+            <ColumnDefinition Width="723*"/>
+        </Grid.ColumnDefinitions>
+        <TextBox x:Name="meineTextbox" Grid.Column="1" HorizontalAlignment="Left" Margin="178,114,0,0" TextWrapping="Wrap" Text="Mein Text" VerticalAlignment="Top" Width="271" Height="103" MouseEnter="MausFaehrtHinein" MouseLeave="MausVerlaesstTb"/>
+        <Button Grid.Column="1" Content="Start!" HorizontalAlignment="Left" Margin="361,282,0,0" VerticalAlignment="Top" Click="Button_Click"/>
+        <Label x:Name="meinLabel" Grid.Column="1" Content="Label" HorizontalAlignment="Left" Margin="494,274,0,0" VerticalAlignment="Top" RenderTransformOrigin="0.5,0.5" Width="193">
+            <Label.RenderTransform>
+                <TransformGroup>
+                    <ScaleTransform/>
+                    <SkewTransform/>
+                    <RotateTransform Angle="1.17"/>
+                    <TranslateTransform/>
+                </TransformGroup>
+            </Label.RenderTransform>
+        </Label>
+
+    </Grid>
+</Window>

P19 WPF_Demo/MainWindow.xaml.cs

+using System.Text;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace P19_WPF_Demo
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        public MainWindow()
+        {
+            InitializeComponent();
+        }
+
+        private void MausFaehrtHinein(object sender, MouseEventArgs e)
+        {
+            if (sender is TextBox tb)
+            {
+                var defaultBrush = tb.Background;
+                tb.Background = new SolidColorBrush(Colors.Red);
+                tb.Tag = defaultBrush;
+            }
+        }
+
+        private void MausVerlaesstTb(object sender, MouseEventArgs e)
+        {
+            if (sender is TextBox tb && tb.Tag is Brush defaultbrush)
+            {
+                tb.Background = defaultbrush;                
+            }
+        }
+
+        private void Button_Click(object sender, RoutedEventArgs e)
+        {
+            meinLabel.Content = meineTextbox.Text;
+        }
+    }
+}
\ No newline at end of file

P19 WPF_Demo/P19 WPF_Demo.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net8.0-windows</TargetFramework>
+    <RootNamespace>P19_WPF_Demo</RootNamespace>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <UseWPF>true</UseWPF>
+  </PropertyGroup>
+
+</Project>

P20 Liste mit Delegate/P20 Liste mit Delegate.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>P20_Liste_mit_Delegate</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

P20 Liste mit Delegate/Program.cs

+
+namespace P20_Liste_mit_Delegate
+{
+    class Liste<T>
+    {
+        class LItem
+        {
+            public T data;
+            public LItem next = null;
+            public LItem(T data) { this.data = data; }
+        }
+        LItem first = null, last = null;
+        public void Add(params T[] dataarray)
+        {
+            foreach (var data in dataarray)
+            {
+                LItem item = new LItem(data);
+                if (last == null)
+                {
+                    first = last = item;
+                }
+                else
+                {
+                    last = last.next = item;
+                }
+
+            }
+        }
+        public delegate bool meinTest<T>(T s);
+        internal IEnumerable<T> AllPers(meinTest<T> test)
+        {
+            for (LItem item = first; item != null; item = item.next)
+            {
+                if (test(item.data)==true)
+                yield return item.data;
+            }
+        }
+    }
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Liste<string> pers = new Liste<string>();
+            pers.Add("Anton");
+            pers.Add("Berta", "Claudia", "Dieter", "Egon");
+            //foreach (var item in pers.AllPers(s => s.Contains("er")))
+            foreach (var item in pers.AllPers(s => s[^1] == 'n'))
+            {
+                Console.WriteLine(item);
+            }
+
+            Liste<int> il = new();
+            il.Add(1,2,3,4,5,6,7,8,9);
+            foreach (var item in il.AllPers(x => x%2==0))
+            {
+                Console.WriteLine(item);
+            }
+        }
+    }
+}