added cm7 files (databinding)

Qwirkle/cm7/cm7.cs

@@ -0,0 +1,28 @@
+// DataBinding Baby !!
+
+// Applcation se basant sur le site wtatennis.com
+
+// class : Player, Place (Birth Places), Manager, IPersistanceManager
+// enum : Hand (lfet-handed or right-handed)
+
+// Player.cs
+
+public string FirstName
+{
+    get => firstName;
+    set
+    {
+        if(value == firstName) return;
+        firstName = value;
+        OnPropertyChanged();
+    }
+}
+
+private string firstName;
+
+public event PropertyChangedEventHandler PropertyChanged;
+
+public void OnPropertyChanged([CallerMemberName] string propertyName = null)
+{
+    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+}

Qwirkle/cm7/cm7.xaml

@@ -0,0 +1,41 @@
+<!-- Player Page -->
+
+<Grid ColumnDefinition="*, *" RowDefinition="Auto, *">
+    <Grid BackgroundColor="Blue">
+        <VerticalStackLayout>
+            <Label Text="Ranking"/>
+            <Label Text="{Binding Rank}"/>
+            <Label Text="Singles"/>
+        </VerticalStackLayout>
+    </Grid>
+    <Grid BackgroundColor="Blue" Grid.Column="1">
+        <VerticalStackLayout>
+            <Entry Text="{Binding Player.FirstName, Mode=OneWayToSource}"/> 
+            <Label Text="{Binding Player.FirstName}, Mode=(OneWay, TwoWay, OneWayToSource)"/> <!-- Automatically subscribed to the source's property change -->
+            <Label Text="{Binding Player.LastName}"/>
+            <Label Text="{Binding Player.Height, StringFormat=\{0\}m}"/>
+            <Button Text="=>" Clicked="ButtonClicked"/>
+        </VerticalStackLayout>
+    </Grid>
+    <Image Grid.RowSpan="2" Source="{Binding Player.ImageLarge}"/>
+</Grid>
+
+<!-- =================== -->
+
+<!-- Players Page -->
+
+<ListView ItemsSource="{Binding Players}">
+    <ListView.ItemTemplate>
+        <DataTemplate>
+            <ViewCell>
+                <HorizontalStackLayout>
+                    <Label Text="{Binding FirstName}"/>
+                    <Label Text="{Binding LastName}"/>
+                    <Label Text="{Binding Points}"/>
+                </HorizontalStackLayout>
+            </ViewCell>
+        </DataTemplate>
+    </ListView.ItemTemplate>
+</ListView>
+
+<!-- =================== -->

Qwirkle/cm7/cm7_codebehind.cs

@@ -0,0 +1,80 @@
+// Code Behind for PlayerPage
+
+public partial class PlayerPage : ContentPage
+{
+    public Manager Mgr { get; set; } = new Manager(new Stub());
+
+    public int PlayerIndex { get; set; } = 0;
+
+    public RankedPlayer RankedPlayer { get; set; }
+
+    public PlayerPage()
+    {
+        Mgr.LoadPlayers();
+
+        InitializeComponent();
+
+        RankedPlayer = new RankedPlayer(Mgr.Players.ElementAt(2), Mgr);
+        BindingContext = RankedPlayer;
+    }
+
+    public void ButtonClicked(object sender, EventArgs e)
+    {
+        PlayerIndex++;
+        RankedPlayer.Player = Mgr.Players.ElementAt(PlayerIndex); // Source's property changed, not the source itself
+    }
+}
+
+public class RankedPlayer : INotifyPropertyChanged
+{
+    public RankedPlayer(Player player, Manager mgr)
+    {
+        Mgr = mgr;
+        Player = player;
+    }
+
+    private Manager Mgr { get; set; }
+
+    public Player thePlayer
+    {
+        get => thePlayer;
+        set
+        {
+            if(value == thePlayer) return;
+            thePlayer = value;
+            OnPropertyChanged("ThePlayer");
+            OnPropertyChanged(nameof(Rank));
+        }
+    }
+
+    private Player thePlayer;
+
+    public int Rank => Mgr.Players.OrderingByDescending(p => p.Points).ToList().IndexOf(Player) + 1;
+
+    public event PropertyChangedEventHandler PropertyChanged;
+
+    public void OnPropertyChanged(string propertyName)
+    {
+        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+    }
+}
+
+// ===============================
+
+// Code behind for Players Page
+
+public partial class PlayersPage : ContentPage
+{
+    public Manager Mgr { get; set; } = new Manager(new Stub());
+
+    public PlayersPage()
+    {
+        Mgr.LoadPlayers();
+
+        InitializeComponent();
+
+        BindingContext = Mgr;
+    }
+}
+
+// ===============================