Chargement en async + indicateur d'activité

AideDeJeu/AideDeJeu.Android/Resources/Resource.designer.cs

@@ -1,11 +1,11 @@
 #pragma warning disable 1591
 //------------------------------------------------------------------------------
 // <auto-generated>
-//     Ce code a été généré par un outil.
+//     This code was generated by a tool.
-//     Version du runtime :4.0.30319.42000
+//     Runtime Version:4.0.30319.42000
 //
-//     Les modifications apportées à ce fichier peuvent provoquer un comportement incorrect et seront perdues si
+//     Changes to this file may cause incorrect behavior and will be lost if
-//     le code est régénéré.
+//     the code is regenerated.
 // </auto-generated>
 //------------------------------------------------------------------------------
 

AideDeJeu/AideDeJeu/AideDeJeu.csproj

@@ -7,8 +7,12 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
     <DebugType>pdbonly</DebugType>
     <DebugSymbols>true</DebugSymbols>
+    <LangVersion>Latest</LangVersion>
   </PropertyGroup>
 
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <LangVersion>Latest</LangVersion>
+  </PropertyGroup>
   <ItemGroup>
     <EmbeddedResource Remove="Resources\AdJTheme.xaml" />
   </ItemGroup>

AideDeJeu/AideDeJeu/ViewModels/FilterViewModel.cs

@@ -8,13 +8,15 @@ using System.Diagnostics;
 using System.Linq;
 using System.Text;
 using System.Windows.Input;
+using System.Threading;
+using System.Threading.Tasks;
 
 namespace AideDeJeu.ViewModels
 {
     public abstract class FilterViewModel : BaseViewModel
     {
         public ICommand LoadItemsCommand { get; protected set; }
-        public abstract IEnumerable<Item> FilterItems(IEnumerable<Item> items);
+        public abstract Task<IEnumerable<Item>> FilterItems(IEnumerable<Item> items, CancellationToken token = default);
         public abstract IEnumerable<Filter> Filters { get; }
         private string _SearchText = "";
         public string SearchText
@@ -111,7 +113,9 @@ namespace AideDeJeu.ViewModels
         }
 
 
-        public override IEnumerable<Item> FilterItems(IEnumerable<Item> items)
+        public override async Task<IEnumerable<Item>> FilterItems(IEnumerable<Item> items, CancellationToken token = default)
+        {
+            return await Task.Run(() =>
             {
                 var classe = Filters.SingleOrDefault(filter => filter.Key == FilterKeys.Class).SelectedKey ?? "";
                 var niveauMin = Filters.SingleOrDefault(filter => filter.Key == FilterKeys.MinLevel).SelectedKey ?? "0";
@@ -119,9 +123,8 @@ namespace AideDeJeu.ViewModels
                 var ecole = Filters.SingleOrDefault(filter => filter.Key == FilterKeys.School).SelectedKey ?? "";
                 var rituel = Filters.SingleOrDefault(filter => filter.Key == FilterKeys.Ritual).SelectedKey ?? "";
                 var source = Filters.SingleOrDefault(filter => filter.Key == FilterKeys.Source).SelectedKey ?? "";
-
+                token.ThrowIfCancellationRequested();
-            return items
+                return items.Where(item =>
-                    .Where(item =>
                 {
                     var spell = item as Spell;
                     return (int.Parse(spell.Level) >= int.Parse(niveauMin)) &&
@@ -131,9 +134,10 @@ namespace AideDeJeu.ViewModels
                         spell.Source.Contains(classe) &&
                         spell.Type.Contains(rituel) &&
                         spell.NamePHB.ToLower().Contains(SearchText.ToLower());
-                    })
+                }).OrderBy(spell => spell.NamePHB)
-                    .OrderBy(spell => spell.NamePHB)
+                            .AsEnumerable();
-                    .ToList();
+            }, token);
+
         }
 
         public abstract List<KeyValuePair<string, string>> Classes { get; }
@@ -343,17 +347,28 @@ namespace AideDeJeu.ViewModels
             }
         }
 
-        public override IEnumerable<Item> FilterItems(IEnumerable<Item> items)
+        public override async Task<IEnumerable<Item>> FilterItems(IEnumerable<Item> items, CancellationToken token = default)
+        {
+            return await Task.Run(() =>
             {
                 var powerComparer = new PowerComparer();
 
                 //var category = Filters.SingleOrDefault(filter => filter.Key == FilterKeys.Category).SelectedKey ?? "";
                 var type = Filters.SingleOrDefault(filter => filter.Key == FilterKeys.Type).SelectedKey ?? "";
+                token.ThrowIfCancellationRequested();
+
                 var minPower = Filters.SingleOrDefault(filter => filter.Key == FilterKeys.MinPower).SelectedKey ?? "0 (0 PX)";
+                token.ThrowIfCancellationRequested();
+
                 var maxPower = Filters.SingleOrDefault(filter => filter.Key == FilterKeys.MaxPower).SelectedKey ?? "30 (155000 PX)";
+                token.ThrowIfCancellationRequested();
+
                 var size = Filters.SingleOrDefault(filter => filter.Key == FilterKeys.Size).SelectedKey ?? "";
+                token.ThrowIfCancellationRequested();
                 //var legendary = Filters.SingleOrDefault(filter => filter.Key == FilterKeys.Legendary).SelectedKey ?? "";
+
                 var source = Filters.SingleOrDefault(filter => filter.Key == FilterKeys.Source).SelectedKey ?? "";
+                token.ThrowIfCancellationRequested();
 
                 return items.Where(item =>
                 {
@@ -366,7 +381,9 @@ namespace AideDeJeu.ViewModels
                         monster.NamePHB.ToLower().Contains(SearchText.ToLower());
                 })
                     .OrderBy(monster => monster.NamePHB)
-                .ToList();
+                            .AsEnumerable();
+            }, token);
+
         }
 
         public abstract List<KeyValuePair<string, string>> Categories { get; }

AideDeJeu/AideDeJeu/ViewModels/ItemsViewModel.cs

@@ -8,15 +8,18 @@ using System.Diagnostics;
 using System.Threading.Tasks;
 using System.Windows.Input;
 using Xamarin.Forms;
+using System.Threading;
 
 namespace AideDeJeu.ViewModels
 {
     public abstract class ItemsViewModel : BaseViewModel
     {
+        CancellationTokenSource cancellationTokenSource;
+
         public ItemsViewModel(ItemSourceType itemSourceType)
         {
             this.ItemSourceType = itemSourceType;
-            LoadItemsCommand = new Command(() => ExecuteLoadItemsCommand());
+            LoadItemsCommand = new Command(async () => await ExecuteLoadItemsCommandAsync());
         }
         public ICommand LoadItemsCommand { get; protected set; }
         //public abstract void ExecuteLoadItemsCommand();
@@ -66,26 +69,28 @@ namespace AideDeJeu.ViewModels
             }
         }
 
-        public void ExecuteLoadItemsCommand()
+        async Task LoadItemsAsync(CancellationToken token = default)
         {
-            if (IsBusy)
-                return;
-
             IsBusy = true;
-
+            Main.IsLoading = true;
             try
             {
-                Main.Items.Clear();
-
                 var filterViewModel = Main.GetFilterViewModel(ItemSourceType);
-                var items = filterViewModel.FilterItems(AllItems);
+                var items = await filterViewModel.FilterItems(AllItems, token);
-
+                await Task.Run(() =>
+                {
+                    Main.Items.Clear();
                     foreach (var item in items)
                     {
+                        token.ThrowIfCancellationRequested();
                         Main.Items.Add(item);
                     }
+                });
+
+                //On arrete le loading ici car on annule toujours avant de lancer une nouvelle opération
+                Main.IsLoading = false;
             }
-            catch (Exception ex)
+            catch (OperationCanceledException ex)
             {
                 Debug.WriteLine(ex);
             }
@@ -95,6 +100,14 @@ namespace AideDeJeu.ViewModels
             }
         }
 
-
+        public async Task ExecuteLoadItemsCommandAsync()
+        {
+            if (cancellationTokenSource != null)
+            {
+                cancellationTokenSource.Cancel();
+            }
+            cancellationTokenSource = new CancellationTokenSource();
+            await LoadItemsAsync(cancellationTokenSource.Token);
+        }
     }
 }

AideDeJeu/AideDeJeu/ViewModels/MainViewModel.cs

@@ -52,6 +52,13 @@ namespace AideDeJeu.ViewModels
             }
         }
 
+        private bool _isLoading;
+        public bool IsLoading
+        {
+            get => _isLoading;
+            set => SetProperty(ref _isLoading, value);
+        }
+
         public Dictionary<ItemSourceType, Lazy<ItemsViewModel>> AllItemsViewModel = new Dictionary<ItemSourceType, Lazy<ItemsViewModel>>()
         {
             { ItemSourceType.SpellVF, new Lazy<ItemsViewModel>(() => new SpellsViewModel(ItemSourceType.SpellVF)) },
@@ -116,9 +123,9 @@ namespace AideDeJeu.ViewModels
 
         public MainViewModel()
         {
-            LoadItemsCommand = new Command(() =>
+            LoadItemsCommand = new Command(async () =>
                 {
-                    GetItemsViewModel(ItemSourceType).ExecuteLoadItemsCommand();
+                    await GetItemsViewModel(ItemSourceType).ExecuteLoadItemsCommandAsync();
                 });
             GotoItemCommand = new Command<Item>(async (item) => await GetItemsViewModel(ItemSourceType).ExecuteGotoItemCommandAsync(item));
             SwitchToSpells = new Command(() => ItemSourceType = (ItemSourceType & ~ItemSourceType.Monster) | ItemSourceType.Spell);
@@ -127,10 +134,10 @@ namespace AideDeJeu.ViewModels
             SwitchToVO = new Command(() => ItemSourceType = (ItemSourceType & ~ItemSourceType.VF & ~ItemSourceType.HD) | ItemSourceType.VO);
             SwitchToHD = new Command(() => ItemSourceType = (ItemSourceType & ~ItemSourceType.VF & ~ItemSourceType.VO) | ItemSourceType.HD);
             AboutCommand = new Command(async () => await Main.Navigator.GotoAboutPageAsync());
-            SearchCommand = new Command<string>((text) =>
+            SearchCommand = new Command<string>(async (text) =>
                 {
                     GetFilterViewModel(ItemSourceType).SearchText = text;
-                    GetItemsViewModel(ItemSourceType).ExecuteLoadItemsCommand();
+                    await GetItemsViewModel(ItemSourceType).ExecuteLoadItemsCommandAsync();
                 });
         }
     }

AideDeJeu/AideDeJeu/Views/MainPage.xaml

@@ -1,31 +1,15 @@
-<?xml version="1.0" encoding="utf-8" ?>
+<?xml version="1.0" encoding="utf-8"?>
-<MasterDetailPage xmlns="http://xamarin.com/schemas/2014/forms"
+<MasterDetailPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" xmlns:local="clr-namespace:AideDeJeu.Views" xmlns:tools="clr-namespace:AideDeJeu.Tools" x:Class="AideDeJeu.Views.MainPage" x:Name="This" IsPresented="False" Title="">
-                xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
-                xmlns:local="clr-namespace:AideDeJeu.Views"
-                xmlns:tools="clr-namespace:AideDeJeu.Tools"
-                x:Class="AideDeJeu.Views.MainPage"
-                x:Name="This"
-                IsPresented="False"
-                Title="">
     <MasterDetailPage.Resources>
         <ResourceDictionary>
-            <tools:ItemSourceTypeToStringConverter 
+            <tools:ItemSourceTypeToStringConverter x:Key="ItemSourceTypeToTitleConverter" SpellVF="Sorts" SpellVO="Spells" SpellHD="Sorts (H&amp;D)" MonsterVF="Monstres" MonsterVO="Monsters" MonsterHD="Créatures (H&amp;D)" />
-                x:Key="ItemSourceTypeToTitleConverter" 
+            <tools:ItemSourceTypeToItemsConverter x:Key="ItemSourceTypeToItemsConverter" />
-                SpellVF="Sorts" 
+            <tools:ItemSourceTypeToFilterConverter x:Key="ItemSourceTypeToFilterConverter" />
-                SpellVO="Spells" 
-                SpellHD="Sorts (H&amp;D)" 
-                MonsterVF="Monstres" 
-                MonsterVO="Monsters" 
-                MonsterHD="Créatures (H&amp;D)" 
-                />
-            <tools:ItemSourceTypeToItemsConverter 
-                x:Key="ItemSourceTypeToItemsConverter" />
-            <tools:ItemSourceTypeToFilterConverter 
-                x:Key="ItemSourceTypeToFilterConverter" />
         </ResourceDictionary>
     </MasterDetailPage.Resources>
     <MasterDetailPage.Master>
         <ContentPage Title=" ">
+            <AbsoluteLayout>
                 <ListView ItemsSource="{Binding ItemSourceType, Converter={StaticResource ItemSourceTypeToFilterConverter}}" HasUnevenRows="True" RowHeight="-1" SeparatorVisibility="None" IsPullToRefreshEnabled="False">
                     <ListView.ItemTemplate>
                         <DataTemplate>
@@ -40,6 +24,7 @@
                         </DataTemplate>
                     </ListView.ItemTemplate>
                 </ListView>
+            </AbsoluteLayout>
         </ContentPage>
     </MasterDetailPage.Master>
     <MasterDetailPage.Detail>
@@ -54,38 +39,27 @@
                         <ToolbarItem Name="VO" Text="VO AideDD/SRD" Order="Secondary" Command="{Binding SwitchToVO}" />
                         <ToolbarItem Name="HD" Text="VF H&amp;D" Order="Secondary" Command="{Binding SwitchToHD}" />
                     </ContentPage.ToolbarItems>
+                    <AbsoluteLayout>
                         <StackLayout Orientation="Vertical">
                             <SearchBar x:Name="SearchBar" SearchCommand="{Binding SearchCommand}" SearchCommandParameter="{Binding Text, Source={x:Reference SearchBar}}">
                                 <SearchBar.Behaviors>
                                     <tools:TextChangedBehavior />
                                 </SearchBar.Behaviors>
                             </SearchBar>
-
+                            <ListView x:Name="ItemsListView" ItemsSource="{Binding Items}" VerticalOptions="FillAndExpand" HasUnevenRows="true" IsRefreshing="{Binding IsBusy, Mode=OneWay}" CachingStrategy="RecycleElement" SelectedItem="{Binding SelectedItem}" ItemTapped="ItemsListView_ItemTapped">
-                        <ListView 
-                            x:Name="ItemsListView" 
-                            ItemsSource="{Binding Items}" 
-                            VerticalOptions="FillAndExpand"
-                            HasUnevenRows="true"
-                            IsRefreshing="{Binding IsBusy, Mode=OneWay}"
-                            CachingStrategy="RecycleElement"
-                            SelectedItem="{Binding SelectedItem}"
-                            ItemTapped="ItemsListView_ItemTapped">
-
                                 <ListView.ItemTemplate>
                                     <DataTemplate>
                                         <ViewCell>
                                             <StackLayout Padding="10">
-                                            <Label 
+                                                <Label Text="{Binding NamePHB}" LineBreakMode="NoWrap" Style="{DynamicResource subsubsection}" FontSize="16" />
-                                                Text="{Binding NamePHB}" 
-                                                LineBreakMode="NoWrap" 
-                                                Style="{DynamicResource subsubsection}" 
-                                                FontSize="16" />
                                             </StackLayout>
                                         </ViewCell>
                                     </DataTemplate>
                                 </ListView.ItemTemplate>
                             </ListView>
                         </StackLayout>
+                        <ActivityIndicator AbsoluteLayout.LayoutBounds="0.5,0.5" AbsoluteLayout.LayoutFlags="XProportional, YProportional" IsRunning="{x:Binding IsLoading}" Color="Olive" />
+                    </AbsoluteLayout>
                 </ContentPage>
             </x:Arguments>
         </NavigationPage>