👔 💄 🖖 🚧 WIP MVVM album detail

AD_MAUI/AD_MAUI.csproj

@@ -3,6 +3,7 @@
 	<PropertyGroup>
 		<TargetFrameworks>net7.0-android;net7.0-ios;net7.0-maccatalyst</TargetFrameworks>
 		<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net7.0-windows10.0.19041.0</TargetFrameworks>
+		<Nullable>enable</Nullable>
 		<!-- Uncomment to also build the tizen app. You will need to install tizen by following this: https://github.com/Samsung/Tizen.NET -->
 		<!-- <TargetFrameworks>$(TargetFrameworks);net7.0-tizen</TargetFrameworks> -->
 		<OutputType>Exe</OutputType>
@@ -52,9 +53,14 @@
 		<PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="7.0.0" />
 	</ItemGroup>
 
+	<ItemGroup>
+	  <MauiXaml Update="Views\AlbumPage.xaml">
+	    <Generator>MSBuild:Compile</Generator>
+	  </MauiXaml>
+	</ItemGroup>
+
 	<ItemGroup>
 	  <Folder Include="Pages\" />
-	  <Folder Include="Views\" />
 	</ItemGroup>
 
 </Project>

AD_MAUI/App.xaml.cs

@@ -2,10 +2,10 @@
 
 public partial class App : Application
 {
-	public App()
-	{
-		InitializeComponent();
+    public App()
+    {
+        InitializeComponent();
 
-		MainPage = new AppShell();
-	}
+        MainPage = new AppShell();
+    }
 }

AD_MAUI/AppShell.xaml.cs

@@ -2,8 +2,8 @@
 
 public partial class AppShell : Shell
 {
-	public AppShell()
-	{
-		InitializeComponent();
-	}
+    public AppShell()
+    {
+        InitializeComponent();
+    }
 }

AD_MAUI/MainPage.xaml

@@ -3,39 +3,10 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
              x:Class="AD_MAUI.MainPage">
 
-    <ScrollView>
-        <VerticalStackLayout
-            Spacing="25"
-            Padding="30,0"
-            VerticalOptions="Center">
-
-            <Image
-                Source="dotnet_bot.png"
-                SemanticProperties.Description="Cute dot net bot waving hi to you!"
-                HeightRequest="200"
-                HorizontalOptions="Center" />
-
-            <Label
-                Text="Hello, World!"
-                SemanticProperties.HeadingLevel="Level1"
-                FontSize="32"
-                HorizontalOptions="Center" />
-
-            <Label
-                Text="Welcome to .NET Multi-platform App UI"
-                SemanticProperties.HeadingLevel="Level2"
-                SemanticProperties.Description="Welcome to dot net Multi platform App U I"
-                FontSize="18"
-                HorizontalOptions="Center" />
-
-            <Button
-                x:Name="CounterBtn"
-                Text="Click me"
-                SemanticProperties.Hint="Counts the number of times you click"
-                Clicked="OnCounterClicked"
-                HorizontalOptions="Center" />
-
-        </VerticalStackLayout>
-    </ScrollView>
+    <Button
+        x:Name="RdmBtn"
+        Text="DO IT"
+        Clicked="OnRdmBtnClicked"
+        />
 
 </ContentPage>

AD_MAUI/MainPage.xaml.cs

@@ -1,24 +1,20 @@
-namespace AD_MAUI;
+using AD_MAUI.ViewModel;
+using AD_MAUI.Views;
+
+namespace AD_MAUI;
 
 public partial class MainPage : ContentPage
 {
-	int count = 0;
-
-	public MainPage()
-	{
-		InitializeComponent();
-	}
-
-	private void OnCounterClicked(object sender, EventArgs e)
-	{
-		count++;
+    public MainPage()
+    {
+        InitializeComponent();
+    }
 
-		if (count == 1)
-			CounterBtn.Text = $"Clicked {count} time";
-		else
-			CounterBtn.Text = $"Clicked {count} times";
+    // TODO use commands (or navigation methods?) in VMApp instead
+    private void OnRdmBtnClicked(object sender, EventArgs e)
+    {
+        Navigation.PushAsync(new AlbumPage(new AlbumViewModel(null)));
+    }
 
-		SemanticScreenReader.Announce(CounterBtn.Text);
-	}
 }
 

AD_MAUI/MauiProgram.cs

@@ -4,21 +4,21 @@ namespace AD_MAUI;
 
 public static class MauiProgram
 {
-	public static MauiApp CreateMauiApp()
-	{
-		var builder = MauiApp.CreateBuilder();
-		builder
-			.UseMauiApp<App>()
-			.ConfigureFonts(fonts =>
-			{
-				fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
-				fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
-			});
+    public static MauiApp CreateMauiApp()
+    {
+        var builder = MauiApp.CreateBuilder();
+        builder
+            .UseMauiApp<App>()
+            .ConfigureFonts(fonts =>
+            {
+                fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
+                fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
+            });
 
 #if DEBUG
-		builder.Logging.AddDebug();
+        builder.Logging.AddDebug();
 #endif
 
-		return builder.Build();
-	}
+        return builder.Build();
+    }
 }

AD_MAUI/Model/Album.cs

@@ -0,0 +1,12 @@
+namespace AD_MAUI.Model
+{
+    public class Album
+    {
+        public int Id { get; set; }
+        public string Title { get; set; }
+        public string Artist { get; set; }
+        public string CoverImage { get; set; }
+        public List<Song> Songs { get; set; }
+    }
+
+}

AD_MAUI/Model/Song.cs

@@ -0,0 +1,9 @@
+namespace AD_MAUI.Model
+{
+    public class Song
+    {
+        public int Id { get; set; }
+        public string Title { get; set; }
+        public int Duration { get; set; }
+    }
+}

AD_MAUI/Platforms/Android/MainActivity.cs

@@ -1,6 +1,5 @@
 using Android.App;
 using Android.Content.PM;
-using Android.OS;
 
 namespace AD_MAUI;
 

AD_MAUI/Platforms/Android/MainApplication.cs

@@ -6,10 +6,10 @@ namespace AD_MAUI;
 [Application]
 public class MainApplication : MauiApplication
 {
-	public MainApplication(IntPtr handle, JniHandleOwnership ownership)
-		: base(handle, ownership)
-	{
-	}
+    public MainApplication(IntPtr handle, JniHandleOwnership ownership)
+        : base(handle, ownership)
+    {
+    }
 
-	protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
+    protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
 }

AD_MAUI/Platforms/MacCatalyst/AppDelegate.cs

@@ -5,5 +5,5 @@ namespace AD_MAUI;
 [Register("AppDelegate")]
 public class AppDelegate : MauiUIApplicationDelegate
 {
-	protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
+    protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
 }

AD_MAUI/Platforms/MacCatalyst/Program.cs

@@ -1,15 +1,14 @@
-using ObjCRuntime;
-using UIKit;
+using UIKit;
 
 namespace AD_MAUI;
 
 public class Program
 {
-	// This is the main entry point of the application.
-	static void Main(string[] args)
-	{
-		// if you want to use a different Application Delegate class from "AppDelegate"
-		// you can specify it here.
-		UIApplication.Main(args, null, typeof(AppDelegate));
-	}
+    // This is the main entry point of the application.
+    static void Main(string[] args)
+    {
+        // if you want to use a different Application Delegate class from "AppDelegate"
+        // you can specify it here.
+        UIApplication.Main(args, null, typeof(AppDelegate));
+    }
 }

AD_MAUI/Platforms/Windows/App.xaml.cs

@@ -1,6 +1,4 @@
-using Microsoft.UI.Xaml;
-
-// To learn more about WinUI, the WinUI project structure,
+// To learn more about WinUI, the WinUI project structure,
 // and more about our project templates, see: http://aka.ms/winui-project-info.
 
 namespace AD_MAUI.WinUI;
@@ -10,15 +8,15 @@ namespace AD_MAUI.WinUI;
 /// </summary>
 public partial class App : MauiWinUIApplication
 {
-	/// <summary>
-	/// Initializes the singleton application object.  This is the first line of authored code
-	/// executed, and as such is the logical equivalent of main() or WinMain().
-	/// </summary>
-	public App()
-	{
-		this.InitializeComponent();
-	}
+    /// <summary>
+    /// Initializes the singleton application object.  This is the first line of authored code
+    /// executed, and as such is the logical equivalent of main() or WinMain().
+    /// </summary>
+    public App()
+    {
+        this.InitializeComponent();
+    }
 
-	protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
+    protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
 }
 

AD_MAUI/Platforms/iOS/AppDelegate.cs

@@ -5,5 +5,5 @@ namespace AD_MAUI;
 [Register("AppDelegate")]
 public class AppDelegate : MauiUIApplicationDelegate
 {
-	protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
+    protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
 }

AD_MAUI/Platforms/iOS/Program.cs

@@ -1,15 +1,14 @@
-using ObjCRuntime;
-using UIKit;
+using UIKit;
 
 namespace AD_MAUI;
 
 public class Program
 {
-	// This is the main entry point of the application.
-	static void Main(string[] args)
-	{
-		// if you want to use a different Application Delegate class from "AppDelegate"
-		// you can specify it here.
-		UIApplication.Main(args, null, typeof(AppDelegate));
-	}
+    // This is the main entry point of the application.
+    static void Main(string[] args)
+    {
+        // if you want to use a different Application Delegate class from "AppDelegate"
+        // you can specify it here.
+        UIApplication.Main(args, null, typeof(AppDelegate));
+    }
 }

AD_MAUI/ViewModel/AlbumViewModel.cs

@@ -0,0 +1,86 @@
+using AD_MAUI.Model;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace AD_MAUI.ViewModel
+{
+    // TODO make sure not to notify change if not necessary!
+
+    public class AlbumViewModel : INotifyPropertyChanged
+    {
+        public event PropertyChangedEventHandler? PropertyChanged;
+
+        private readonly Album album = new();
+
+        public int Id { get => album.Id; }
+
+        public string Title
+        {
+            get => album.Title;
+            set
+            {
+                if (album.Title != value)
+                {
+                    album.Title = value;
+                    OnPropertyChanged();
+                }
+            }
+        }
+
+        public string Artist
+        {
+            get => album.Artist;
+            set
+            {
+                if (album.Artist != value)
+                {
+                    album.Artist = value;
+                    OnPropertyChanged();
+                }
+            }
+        }
+
+        public string CoverImage
+        {
+            get => album.CoverImage;
+            set
+            {
+                if (album.CoverImage != value)
+                {
+                    album.CoverImage = value;
+                    OnPropertyChanged();
+                }
+            }
+        }
+
+        public ReadOnlyObservableCollection<SongViewModel> Songs { get => new(songs); }
+
+        private readonly ObservableCollection<SongViewModel> songs;
+
+
+        public AlbumViewModel(Album? album)
+        {
+            // Mocked data for testing
+            this.album = album ?? new Album
+            {
+                Id = 1,
+                Title = "Test Album",
+                Artist = "Test Artist",
+                CoverImage = "dotnet_bot.png", // make this a path?
+                Songs = new List<Song>
+                {
+                    new Song { Id = 1, Title = "Test Song 1", Duration = 210 },
+                    new Song { Id = 2, Title = "Test Song 2", Duration = 260 },
+                    new Song { Id = 3, Title = "Test Song 3", Duration = 817 },
+                }
+            };
+            songs = new ObservableCollection<SongViewModel>(this.album.Songs.Select(song => new SongViewModel(song)));
+        }
+
+        protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null)
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+    }
+}

AD_MAUI/ViewModel/SongViewModel.cs

@@ -0,0 +1,51 @@
+using AD_MAUI.Model;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace AD_MAUI.ViewModel
+{
+    // TODO make sure not to notify change if not necessary!
+    public class SongViewModel : INotifyPropertyChanged
+    {
+        private readonly Song song;
+
+        public event PropertyChangedEventHandler? PropertyChanged;
+
+        public string Title
+        {
+            get => song.Title;
+            set
+            {
+                if (song.Title != value)
+                {
+                    song.Title = value;
+                    OnPropertyChanged();
+                }
+            }
+        }
+
+        public int Duration
+        {
+            get => song.Duration;
+            set
+            {
+                if (song.Duration != value)
+                {
+                    song.Duration = value;
+                    OnPropertyChanged();
+                }
+            }
+        }
+
+        public SongViewModel(Song? song)
+        {
+            this.song = song ?? new();
+        }
+
+        protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null)
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+    }
+
+}

AD_MAUI/Views/AlbumPage.xaml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:local="clr-namespace:AD_MAUI.ViewModel"
+             x:Class="AD_MAUI.Views.AlbumPage"
+             x:DataType="local:AlbumViewModel">
+
+    <ScrollView>
+        <StackLayout>
+            <Image Source="{Binding CoverImage}" Aspect="AspectFit" />
+            <Label Text="{Binding Title}" FontSize="Large" />
+            <Label Text="{Binding Artist}" FontSize="Medium" />
+
+            <ListView ItemsSource="{Binding Songs}">
+                <ListView.ItemTemplate>
+                    <DataTemplate x:DataType="local:SongViewModel">
+                        <TextCell 
+                            Text="{Binding Title}"
+                            Detail="{Binding Duration, StringFormat='\{0\} second(s)'}"
+                            />
+                    </DataTemplate>
+                </ListView.ItemTemplate>
+            </ListView>
+        </StackLayout>
+    </ScrollView>
+
+</ContentPage>

AD_MAUI/Views/AlbumPage.xaml.cs

@@ -0,0 +1,17 @@
+using AD_MAUI.ViewModel;
+
+namespace AD_MAUI.Views
+{
+    public partial class AlbumPage : ContentPage
+    {
+        private readonly AlbumViewModel viewModel;
+
+        public AlbumPage(AlbumViewModel? albumViewModel)
+        {
+            InitializeComponent();
+
+            viewModel = albumViewModel ?? new AlbumViewModel(null);
+            BindingContext = viewModel;
+        }
+    }
+}