递归浏览文件夹ListBox

zcbenz · Mar 8, 2012 · f762391 · f762391
1 parent d17a272
commit f762391
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Showing 17 changed files with 110 additions and 56 deletions.
diff --git a/App.xaml.cs b/App.xaml.cs
@@ -107,22 +107,15 @@ private void Application_Activated(object sender, ActivatedEventArgs e)
         // This code will not execute when the application is closing
         private void Application_Deactivated(object sender, DeactivatedEventArgs e)
         {
-            // Ensure that required application state is persisted here.
-            if (ViewModel.FavoratesDirectory.First != null)
-                LocalCache.Set<ObservableCollection<BoardViewModel>>("Favorates", ViewModel.FavoratesDirectory.First.Value);
-            else
-                LocalCache.Set<ObservableCollection<BoardViewModel>>("Favorates", ViewModel.FavoratesItems);
+            LocalCache.Set<ObservableCollection<BoardViewModel>>("Favorates", ViewModel.FavoratesItems);
             LocalCache.Set<ObservableCollection<TopicViewModel>>("Topten", ViewModel.ToptenItems);
         }
 
         // Code to execute when the application is closing (eg, user hit Back)
         // This code will not execute when the application is deactivated
         private void Application_Closing(object sender, ClosingEventArgs e)
         {
-            if (ViewModel.FavoratesDirectory.First != null)
-                LocalCache.Set<ObservableCollection<BoardViewModel>>("Favorates", ViewModel.FavoratesDirectory.First.Value);
-            else
-                LocalCache.Set<ObservableCollection<BoardViewModel>>("Favorates", ViewModel.FavoratesItems);
+            LocalCache.Set<ObservableCollection<BoardViewModel>>("Favorates", ViewModel.FavoratesItems);
             LocalCache.Set<ObservableCollection<TopicViewModel>>("Topten", ViewModel.ToptenItems);
         }
 

diff --git a/Controls/ExtendedListBox.cs b/Controls/ExtendedListBox.cs
@@ -6,13 +6,11 @@
 using System.Windows.Controls;
 using System.Windows.Documents;
 using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Animation;
-using System.Windows.Shapes;
 using Microsoft.Phone.Controls;
 using System.Windows.Controls.Primitives;
 using System.Collections;
 using System.Collections.Specialized;
+using System.Windows.Media;
 
 namespace CustomControls
 {

diff --git a/Controls/RecursiveListBox.cs b/Controls/RecursiveListBox.cs
@@ -0,0 +1,64 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Controls.Primitives;
+using System.Collections;
+using System.Collections.Specialized;
+using Microsoft.Phone.Controls;
+using System.Collections.ObjectModel;
+
+namespace CustomControls
+{
+    using ElementType = Sbbs.BoardViewModel;
+    using CollectionType = ObservableCollection<Sbbs.BoardViewModel>;
+    public class RecursiveListBox : ListBox
+    {
+        // 浏览历史
+        private Stack<CollectionType> history = new Stack<CollectionType>();
+
+        // 叶子结点点击事件
+        public delegate void OnLeafItemTap(object sender, SelectionChangedEventArgs e);
+        public event OnLeafItemTap LeafItemTap;
+
+        // 捕捉选择事件
+        private void ListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
+        {
+            if (e.AddedItems.Count == 1)
+            {
+                // 清除选择
+                (sender as ListBox).SelectedIndex = -1;
+
+                ElementType board = e.AddedItems[0] as ElementType;
+                if (board.Leaf && LeafItemTap != null)
+                {
+                    // 叶子结点直接触发事件
+                    LeafItemTap(sender, e);
+                }
+                else if (!board.Leaf)
+                {
+                    // 非叶子结点切换视角
+                    if (board.EnglishName == "..")
+                    {
+                        ItemsSource = history.Pop() as CollectionType;
+                    }
+                    else
+                    {
+                        history.Push(ItemsSource as CollectionType);
+                        ItemsSource = board.Boards;
+                    }
+                }
+            }
+        }
+
+        public RecursiveListBox()
+        {
+            DefaultStyleKey = typeof(RecursiveListBox);
+            SelectionChanged += ListBox_SelectionChanged;
+        }
+    }
+}
diff --git a/MailPage.xaml b/MailPage.xaml
@@ -52,7 +52,7 @@
             </ScrollViewer>
         </StackPanel>
 
-        <ScrollViewer x:Name="Content" Visibility="Collapsed" Grid.Row="1" Margin="12,0,12,0">
+        <ScrollViewer x:Name="MailContent" Visibility="Collapsed" Grid.Row="1" Margin="12,0,12,0">
             <TextBlock Text="{Binding Content}" TextWrapping="Wrap" FontSize="{StaticResource PhoneFontSizeMedium}" />
         </ScrollViewer>
         <toolkit:PerformanceProgressBar x:Name="LoadProgress" IsIndeterminate="True" Grid.Row="1" />

diff --git a/MailPage.xaml.cs b/MailPage.xaml.cs
@@ -39,7 +39,7 @@ protected override void OnNavigatedTo(NavigationEventArgs e)
                 {
                     LoadProgress.Visibility = Visibility.Collapsed;
                     LoadProgress.IsIndeterminate = false;
-                    Content.Visibility = Visibility.Visible;
+                    MailContent.Visibility = Visibility.Visible;
                     if (mail != null)
                         App.ViewModel.Mail.Content = mail.Content;
                 });

diff --git a/MainPage.xaml b/MainPage.xaml
@@ -2,7 +2,8 @@
     x:Class="sbbs_client_wp7.MainPage"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:local="clr-namespace:sbbs_client_wp7"
-    xmlns:sbbs="clr-namespace:sbbs_client_wp7.Sbbs"
+    xmlns:custom="clr-namespace:CustomControls"
+    xmlns:sbbs="clr-namespace:Sbbs"
     xmlns:motion="clr-namespace:MetroInMotionUtils"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
@@ -76,15 +77,8 @@
             <controls:PanoramaItem.Header>
                 <TextBlock motion:MetroInMotion.Tilt="6" Tap="RefreshFavorates_Tap" Text="收藏夹" Foreground="{StaticResource PhoneAccentBrush}" FontSize="60"/>
             </controls:PanoramaItem.Header>
-            <ListBox ItemsSource="{Binding FavoratesItems}" ItemTemplate="{StaticResource BoardDataTemplate}"
-                        SelectionChanged="Favorates_Selected"
-                        CacheMode="BitmapCache">
-                <ListBox.ItemContainerStyle>
-                    <Style TargetType="ListBoxItem">
-                        <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
-                    </Style>
-                </ListBox.ItemContainerStyle>
-            </ListBox>
+            <custom:RecursiveListBox ItemsSource="{Binding FavoratesItems}" ItemTemplate="{StaticResource BoardDataTemplate}"
+                                     LeafItemTap="Favorates_Selected"/>
         </controls:PanoramaItem>
 
         <!-- 我的账户 -->

diff --git a/MainPage.xaml.cs b/MainPage.xaml.cs
@@ -123,27 +123,9 @@ private void Favorates_Selected(object sender, SelectionChangedEventArgs e)
         {
             if (e.AddedItems.Count == 1)
             {
-                ListBox list = sender as ListBox;
                 BoardViewModel board = e.AddedItems[0] as BoardViewModel;
-
-                // 收藏夹目录
-                if (board.Leaf != true && board.EnglishName != "..")
-                {
-                    App.ViewModel.FavoratesDirectory.AddLast(App.ViewModel.FavoratesItems);
-                    App.ViewModel.FavoratesItems = board.Boards;
-                    return;
-                }
-                else if (board.EnglishName == "..")
-                {
-                    App.ViewModel.FavoratesItems = App.ViewModel.FavoratesDirectory.Last.Value;
-                    App.ViewModel.FavoratesDirectory.RemoveLast();
-                    return;
-                }
-
+
                 this.NavigationService.Navigate(new Uri("/BoardPage.xaml?board=" + board.EnglishName + "&description=" + board.Description, UriKind.Relative));
-
-                // 清除选择，否则同样的项目无法点击第二次
-                (sender as ListBox).SelectedIndex = -1;
             }
         }
 
@@ -174,7 +156,6 @@ private void LoadFavorates()
                     if (error != null)
                         return;
 
-                    App.ViewModel.FavoratesDirectory.Clear();
                     App.ViewModel.FavoratesItems = boards;
                 });
             }

diff --git a/SampleData/MainViewModelSampleData.xaml b/SampleData/MainViewModelSampleData.xaml
@@ -2,7 +2,7 @@
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"       
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:local="clr-namespace:sbbs_client_wp7"
-    xmlns:sbbs="clr-namespace:sbbs_client_wp7.Sbbs"
+    xmlns:sbbs="clr-namespace:Sbbs"
     IsDataLoaded="True"
     IsLogin="False"
     IsLogining="False">

diff --git a/Sbbs/BoardViewModel.cs b/Sbbs/BoardViewModel.cs
@@ -4,7 +4,7 @@
 using System.Runtime.Serialization.Json;
 using System.Runtime.Serialization;
 
-namespace sbbs_client_wp7.Sbbs
+namespace Sbbs
 {
     [DataContract(Name = "board")]
     public class BoardViewModel : INotifyPropertyChanged
@@ -16,7 +16,7 @@ public class BoardViewModel : INotifyPropertyChanged
         private uint count;
         private bool leaf = true;
         private ObservableCollection<BoardViewModel> boards;
-
+        
         [DataMember(Name = "name")]
         public string EnglishName
         {

diff --git a/Sbbs/Response.cs b/Sbbs/Response.cs
@@ -2,7 +2,7 @@
 using System.Runtime.Serialization;
 using System.Collections.ObjectModel;
 
-namespace sbbs_client_wp7.Sbbs
+namespace Sbbs
 {
     // 服务器响应通常会包括一个字段作为返回值，该返回值字段名通常不定，
     // 因此响应DataContract子类需要自己手动定义哪个字段是返回值字段

diff --git a/Sbbs/Service.cs b/Sbbs/Service.cs
@@ -7,7 +7,7 @@
 using System.Runtime.Serialization.Json;
 using System.Runtime.Serialization;
 
-namespace sbbs_client_wp7.Sbbs
+namespace Sbbs
 {
     // 集合类型
     using TopicCollection = ObservableCollection<TopicViewModel>;

diff --git a/Sbbs/TopicViewModel.cs b/Sbbs/TopicViewModel.cs
@@ -4,7 +4,7 @@
 using System.Runtime.Serialization.Json;
 using System.Runtime.Serialization;
 
-namespace sbbs_client_wp7.Sbbs
+namespace Sbbs
 {
     [DataContract(Name = "topic")]
     public class TopicViewModel : INotifyPropertyChanged

diff --git a/Sbbs/TopicsGroupViewModel.cs b/Sbbs/TopicsGroupViewModel.cs
@@ -4,7 +4,7 @@
 using System.Runtime.Serialization.Json;
 using System.Runtime.Serialization;
 
-namespace sbbs_client_wp7.Sbbs
+namespace Sbbs
 {
     [DataContract]
     public class HotTopicsViewModel : INotifyPropertyChanged

diff --git a/Sbbs/UserViewModel.cs b/Sbbs/UserViewModel.cs
@@ -4,7 +4,7 @@
 using System.Runtime.Serialization.Json;
 using System.Runtime.Serialization;
 
-namespace sbbs_client_wp7.Sbbs
+namespace Sbbs
 {
     public class UserViewModel : INotifyPropertyChanged
     {

diff --git a/Themes/generic.xaml b/Themes/generic.xaml
@@ -17,7 +17,7 @@
                 <ControlTemplate TargetType="custom:ExtendedListBox">
                     <ScrollViewer x:Name="ScrollViewer" Foreground="{TemplateBinding Foreground}" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}">
                         <StackPanel>
-                            <ItemsPresenter x:Name="Content"/>
+                            <ItemsPresenter/>
                             <TextBlock x:Name="LoadMore" Visibility="Collapsed" HorizontalAlignment="Center" Margin="0 5 0 25" Text="载入下一页..." Foreground="{StaticResource PhoneAccentBrush}" FontSize="{StaticResource PhoneFontSizeNormal}" />
                         </StackPanel>
                     </ScrollViewer>
@@ -33,4 +33,30 @@
         </Setter>
     </Style>
 
+    <Style TargetType="custom:RecursiveListBox">
+        <Setter Property="Background" Value="Transparent"/>
+        <Setter Property="Foreground" Value="{StaticResource PhoneForegroundBrush}"/>
+        <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled"/>
+        <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
+        <Setter Property="BorderThickness" Value="0"/>
+        <Setter Property="BorderBrush" Value="Transparent"/>
+        <Setter Property="Padding" Value="0"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="custom:RecursiveListBox">
+                    <ScrollViewer x:Name="ScrollViewer" Foreground="{TemplateBinding Foreground}" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}">
+                        <ItemsPresenter/>
+                    </ScrollViewer>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+        <Setter Property="ItemContainerStyle">
+            <Setter.Value>
+                <Style TargetType="ListBoxItem">
+                    <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
+                </Style>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
 </ResourceDictionary>
diff --git a/ViewModels/MainViewModel.cs b/ViewModels/MainViewModel.cs
@@ -28,7 +28,6 @@ public MainViewModel()
             // 初始化
             CurrentBoard = new CurrentBoardViewModel();
             CurrentTopic = new CurrentTopicViewModel();
-            FavoratesDirectory = new LinkedList<ObservableCollection<BoardViewModel>>();
         }
 
         // 十大热帖
@@ -97,8 +96,6 @@ public ObservableCollection<BoardViewModel> FavoratesItems
                 }
             }
         }
-        // --收藏夹浏览栈
-        public LinkedList<ObservableCollection<BoardViewModel>> FavoratesDirectory { get; set; }
 
         // 当前版面
         public CurrentBoardViewModel CurrentBoard { get; set; }

diff --git a/sbbs-client-wp7.csproj b/sbbs-client-wp7.csproj
@@ -72,6 +72,7 @@
       <DependentUpon>BoardSettingsPage.xaml</DependentUpon>
     </Compile>
     <Compile Include="Controls\ExtendedListBox.cs" />
+    <Compile Include="Controls\RecursiveListBox.cs" />
     <Compile Include="Controls\UIPropertyMetadata.cs" />
     <Compile Include="DynamicOrientationChanges\AnimateOrientationChangesFrame.cs" />
     <Compile Include="DynamicOrientationChanges\FadeOrientationChangesFrame.cs" />