From 28b4d60c801d52a2f99302ede54b9ebea476fbef Mon Sep 17 00:00:00 2001
From: Yan Maniez <yanmaniez@hotmail.com>
Date: Sat, 28 Sep 2019 03:57:39 +0200
Subject: [PATCH] Test FlyoutHeader dynamique par page

---
 .../AideDeJeu/Views/Library/ItemPage.xaml.cs  | 13 ++---
 AideDeJeu/AideDeJeu/Views/MainShell.xaml      | 17 ++++++-
 AideDeJeu/AideDeJeu/Views/MainShell.xaml.cs   | 50 ++++++++++++++++++-
 3 files changed, 72 insertions(+), 8 deletions(-)

diff --git a/AideDeJeu/AideDeJeu/Views/Library/ItemPage.xaml.cs b/AideDeJeu/AideDeJeu/Views/Library/ItemPage.xaml.cs
index d2ab29fd..a74bb43d 100644
--- a/AideDeJeu/AideDeJeu/Views/Library/ItemPage.xaml.cs
+++ b/AideDeJeu/AideDeJeu/Views/Library/ItemPage.xaml.cs
@@ -55,13 +55,13 @@ namespace AideDeJeu.Views.Library
             //LoadPageAsync();
         }
 
-        protected override void OnAppearing()
-        {
-            base.OnAppearing();
-            LoadPageAsync();
-        }
+        //protected override void OnAppearing()
+        //{
+        //    base.OnAppearing();
+        //    LoadPageAsync();
+        //}
 
-        private string _Path { get; set; } = "index.md";
+        private string _Path { get; set; } = null; //"index.md";
         public string Path
         {
             get
@@ -77,6 +77,7 @@ namespace AideDeJeu.Views.Library
 
         private async Task LoadPageAsync()
         {
+            if (Path == null) return;
             var regex = new Regex("/?(?<file>.*?)(_with_(?<with>.*))?\\.md(#(?<anchor>.*))?");
             var match = regex.Match(Uri.UnescapeDataString(Path));
             var file = match.Groups["file"].Value;
diff --git a/AideDeJeu/AideDeJeu/Views/MainShell.xaml b/AideDeJeu/AideDeJeu/Views/MainShell.xaml
index 84486021..7ba06250 100644
--- a/AideDeJeu/AideDeJeu/Views/MainShell.xaml
+++ b/AideDeJeu/AideDeJeu/Views/MainShell.xaml
@@ -5,6 +5,9 @@
        xmlns:pc="clr-namespace:AideDeJeu.Views.PlayerCharacter"
        xmlns:library="clr-namespace:AideDeJeu.Views.Library"
        x:Class="AideDeJeu.Views.MainShell">
+    <Shell.FlyoutHeader>
+        <Label Text="{Binding HeaderTitle}" />
+    </Shell.FlyoutHeader>
 
     <ShellItem Title="Accueil">
         <ShellContent Title="Accueil"  ContentTemplate="{DataTemplate local:MainPage}" />
@@ -16,7 +19,19 @@
         <ShellContent Title="Dés"  ContentTemplate="{DataTemplate local:DicesPage}" />
     </ShellItem>
     <ShellItem Title="Bibliothèque" FlyoutIcon="spell_book.png">
-        <ShellContent Title="Bibliothèque" Icon="spell_book.png" ContentTemplate="{DataTemplate library:ItemPage}" />
+        <!--<ShellContent Title="Bibliothèque" Icon="spell_book.png" ContentTemplate="{DataTemplate library:ItemPage}" />-->
+        <ShellContent Title="Bibliothèque" Icon="spell_book.png">
+            <ShellContent.ContentTemplate>
+                <DataTemplate>
+                    <library:ItemPage>
+                        <x:Arguments>
+                            <x:String>index.md</x:String>
+                        </x:Arguments>
+                    </library:ItemPage>
+                </DataTemplate>
+            </ShellContent.ContentTemplate>
+        </ShellContent>
+
     </ShellItem>
     <!--<FlyoutItem Title="Héros &amp; Dragons">
         <ShellContent Title="Héros &amp; Dragons" ContentTemplate="{DataTemplate library:ItemDetailPage}" />
diff --git a/AideDeJeu/AideDeJeu/Views/MainShell.xaml.cs b/AideDeJeu/AideDeJeu/Views/MainShell.xaml.cs
index 2e5c08df..d4e5defa 100644
--- a/AideDeJeu/AideDeJeu/Views/MainShell.xaml.cs
+++ b/AideDeJeu/AideDeJeu/Views/MainShell.xaml.cs
@@ -1,6 +1,9 @@
 using System;
 using System.Collections.Generic;
+using System.ComponentModel;
+using System.Diagnostics;
 using System.Linq;
+using System.Runtime.CompilerServices;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Input;
@@ -10,7 +13,7 @@ using Xamarin.Forms.Xaml;
 namespace AideDeJeu.Views
 {
     [XamlCompilation(XamlCompilationOptions.Compile)]
-    public partial class MainShell : Shell
+    public partial class MainShell : Shell, INotifyPropertyChanged
     {
         public MainShell()
         {
@@ -29,5 +32,50 @@ namespace AideDeJeu.Views
         {
             await Shell.Current.GoToAsync(path);
         }
+
+        private string _HeaderTitle = string.Empty;
+        public string HeaderTitle
+        {
+            get
+            {
+                return _HeaderTitle;
+            }
+            set
+            {
+                SetProperty(ref _HeaderTitle, value);
+            }
+        }
+        protected override void OnNavigated(ShellNavigatedEventArgs args)
+        {
+            base.OnNavigated(args);
+            Debug.WriteLine(this.CurrentItem.CurrentItem.CurrentItem);
+            HeaderTitle = this.CurrentItem.CurrentItem.CurrentItem.Route;
+        }
+
+        protected bool SetProperty<T>(ref T backingStore, T value,
+    [CallerMemberName]string propertyName = "",
+    Action onChanged = null)
+        {
+            if (EqualityComparer<T>.Default.Equals(backingStore, value))
+                return false;
+
+            backingStore = value;
+            onChanged?.Invoke();
+            CallOnPropertyChanged(propertyName);
+            return true;
+        }
+
+        #region INotifyPropertyChanged
+        public event PropertyChangedEventHandler PropertyChanged;
+        protected void CallOnPropertyChanged([CallerMemberName] string propertyName = "")
+        {
+            var changed = PropertyChanged;
+            if (changed == null)
+                return;
+
+            changed.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+        #endregion
+
     }
 }
\ No newline at end of file