clear groups

src/modules/cmdpal/Exts/SamplePagesExtension/SamplesListPage.cs

@@ -16,21 +16,31 @@ public partial class SamplesListPage : ListPage
         {
             Title = "List Page Sample Command",
             Subtitle = "Display a list of items",
+            Section = "Lists",
         },
         new ListItem(new SampleListPageWithDetails())
         {
             Title = "List Page With Details",
             Subtitle = "A list of items, each with additional details to display",
+            Section = "Lists",
         },
         new ListItem(new SampleUpdatingItemsPage())
         {
             Title = "List page with items that change",
             Subtitle = "The items on the list update themselves in real time",
+            Section = "Lists",
         },
         new ListItem(new SampleDynamicListPage())
         {
             Title = "Dynamic List Page Command",
             Subtitle = "Changes the list of items in response to the typed query",
+            Section = "Lists",
+        },
+        new ListItem(new FizzBuzzListPage())
+        {
+            Title = "Sections sample",
+            Subtitle = "Changing list of items, with sections",
+            Section = "Lists",
         },
 
         // Content pages
@@ -38,32 +48,38 @@ public partial class SamplesListPage : ListPage
         {
             Title = "Sample content page",
             Subtitle = "Display mixed forms, markdown, and other types of content",
+            Section = "Content",
         },
         new ListItem(new SampleTreeContentPage())
         {
             Title = "Sample nested content",
             Subtitle = "Example of nesting a tree of content",
+            Section = "Content",
         },
         new ListItem(new SampleCommentsPage())
         {
             Title = "Sample of nested comments",
             Subtitle = "Demo of using nested trees of content to create a comment thread-like experience",
             Icon = new IconInfo("\uE90A"), // Comment
+            Section = "Content",
         },
         new ListItem(new SampleMarkdownPage())
         {
             Title = "Markdown Page Sample Command",
             Subtitle = "Display a page of rendered markdown",
+            Section = "Content",
         },
             new ListItem(new SampleMarkdownManyBodies())
         {
             Title = "Markdown with multiple blocks",
             Subtitle = "A page with multiple blocks of rendered markdown",
+            Section = "Content",
         },
             new ListItem(new SampleMarkdownDetails())
         {
             Title = "Markdown with details",
             Subtitle = "A page with markdown and details",
+            Section = "Content",
         },
 
         // Settings helpers
@@ -71,6 +87,7 @@ public partial class SamplesListPage : ListPage
         {
             Title = "Sample settings page",
             Subtitle = "A demo of the settings helpers",
+            Section = "Settings",
         },
 
         // Evil edge cases
@@ -79,6 +96,7 @@ public partial class SamplesListPage : ListPage
         {
             Title = "Evil samples",
             Subtitle = "Samples designed to break the palette in many different evil ways",
+            Section = "Debugging",
         }
     ];
 

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/ListGroup.cs

@@ -0,0 +1,16 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Collections.ObjectModel;
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace Microsoft.CmdPal.UI.ViewModels;
+
+public partial class ListGroup : ObservableObject
+{
+    public string Key { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial ObservableCollection<ListItemViewModel> Items { get; set; } = [];
+}

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/ListViewModel.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation
+// Copyright (c) Microsoft Corporation
 // The Microsoft Corporation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
@@ -27,6 +27,12 @@ public partial class ListViewModel : PageViewModel, IDisposable
 
     private ObservableCollection<ListItemViewModel> Items { get; set; } = [];
 
+    [ObservableProperty]
+    public partial bool HasGrouping { get; private set; } = false;
+
+    [ObservableProperty]
+    public partial ObservableCollection<ListGroup> Groups { get; set; } = [];
+
     private readonly ExtensionObject<IListPage> _model;
 
     private readonly Lock _listLock = new();
@@ -248,6 +254,53 @@ public partial class ListViewModel : PageViewModel, IDisposable
         }
     }
 
+    public void UpdateGroupsIfNeeded()
+    {
+        HasGrouping = FilteredItems.Any(i => !string.IsNullOrEmpty(i.Section));
+
+        if (HasGrouping)
+        {
+            lock (_listLock)
+            {
+                if (FilteredItems.Count == 0)
+                {
+                    Groups.Clear();
+                    return;
+                }
+
+                // get current groups
+                var groups = FilteredItems.GroupBy(item => item.Section).Select(group => group);
+
+                // Remove any groups that no longer exist
+                foreach (var group in Groups)
+                {
+                    if (!groups.Any(g => g.Key == group.Key))
+                    {
+                        Groups.Remove(group);
+                    }
+                }
+
+                // Update lists for each existing group
+                foreach (var group in groups)
+                {
+                    var existingGroup = Groups.FirstOrDefault(groupItem => groupItem.Key == group.Key);
+                    if (existingGroup == null)
+                    {
+                        // Add a new group if it doesn't exist
+                        Groups.Add(new ListGroup { Key = group.Key, Items = new ObservableCollection<ListItemViewModel>(group) });
+                        existingGroup = Groups.FirstOrDefault(groupItem => groupItem.Key == group.Key);
+                    }
+
+                    if (existingGroup != null)
+                    {
+                        // Update the existing group
+                        ListHelpers.InPlaceUpdateList(existingGroup.Items, FilteredItems.Where(item => item.Section == group.Key));
+                    }
+                }
+            }
+        }
+    }
+
     /// <summary>
     /// Apply our current filter text to the list of items, and update
     /// FilteredItems to match the results.
@@ -487,6 +540,18 @@ public partial class ListViewModel : PageViewModel, IDisposable
             }
 
             FilteredItems.Clear();
+
+            foreach (ListGroup group in Groups)
+            {
+                foreach (ListItemViewModel item in group.Items)
+                {
+                    item.SafeCleanup();
+                }
+
+                group.Items.Clear();
+            }
+
+            Groups.Clear();
         }
 
         IListPage? model = _model.Unsafe;

src/modules/cmdpal/Microsoft.CmdPal.UI/App.xaml

@@ -11,6 +11,7 @@
                 <!--  Other merged dictionaries here  -->
                 <ResourceDictionary Source="Styles/Button.xaml" />
                 <ResourceDictionary Source="Styles/Colors.xaml" />
+                <ResourceDictionary Source="Styles/Generic.xaml" />
                 <ResourceDictionary Source="Styles/TextBox.xaml" />
                 <ResourceDictionary Source="Styles/Settings.xaml" />
                 <ResourceDictionary Source="Controls/Tag.xaml" />

src/modules/cmdpal/Microsoft.CmdPal.UI/ExtViews/ListPage.xaml

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8" ?>
+<?xml version="1.0" encoding="utf-8" ?>
 <Page
     x:Class="Microsoft.CmdPal.UI.ListPage"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
@@ -17,10 +17,16 @@
     <Page.Resources>
         <!--  TODO: Figure out what we want to do here for filtering/grouping and where  -->
         <!--  https://learn.microsoft.com/windows/windows-app-sdk/api/winrt/microsoft.ui.xaml.data.collectionviewsource  -->
-        <!--<CollectionViewSource
-            x:Name="ItemsCVS"
+        <CollectionViewSource
+            x:Name="GroupedItemsCVS"
             IsSourceGrouped="True"
-            Source="{x:Bind ViewModel.Items, Mode=OneWay}" />-->
+            ItemsPath="Items"
+            Source="{x:Bind ViewModel.Groups, Mode=OneWay}" />
+
+        <CollectionViewSource
+            x:Name="UngroupedItemsCVS"
+            IsSourceGrouped="False"
+            Source="{x:Bind ViewModel.FilteredItems, Mode=OneWay}" />
 
         <converters:StringVisibilityConverter
             x:Key="StringVisibilityConverter"
@@ -107,32 +113,74 @@
             TargetType="x:Boolean"
             Value="{x:Bind ViewModel.ShowEmptyContent, Mode=OneWay}">
             <controls:Case Value="False">
-                <ListView
-                    x:Name="ItemsList"
-                    Padding="0,2,0,0"
-                    DoubleTapped="ItemsList_DoubleTapped"
-                    IsDoubleTapEnabled="True"
-                    IsItemClickEnabled="True"
-                    ItemClick="ItemsList_ItemClick"
-                    ItemTemplate="{StaticResource ListItemViewModelTemplate}"
-                    ItemsSource="{x:Bind ViewModel.FilteredItems, Mode=OneWay}"
-                    SelectionChanged="ItemsList_SelectionChanged">
-                    <ListView.ItemContainerTransitions>
-                        <TransitionCollection />
-                    </ListView.ItemContainerTransitions>
-                    <!--<ListView.GroupStyle>
-                    <GroupStyle HidesIfEmpty="True">
-                        <GroupStyle.HeaderTemplate>
-                            <DataTemplate>
-                                <TextBlock
-                                    Margin="0,16,0,0"
-                                    Foreground="{ThemeResource TextFillColorSecondaryBrush}"
-                                    Text="{Binding Key, Mode=OneWay}" />
-                            </DataTemplate>
-                        </GroupStyle.HeaderTemplate>
-                    </GroupStyle>
-                </ListView.GroupStyle>-->
-                </ListView>
+                <controls:SwitchPresenter
+                    HorizontalAlignment="Stretch"
+                    TargetType="x:Boolean"
+                    Value="{x:Bind ViewModel.HasGrouping, Mode=OneWay}">
+                    <controls:Case Value="True">
+                        <ListView
+                            x:Name="GroupedItemsList"
+                            Padding="0,2,0,0"
+                            DoubleTapped="GroupedItemsList_DoubleTapped"
+                            IsDoubleTapEnabled="True"
+                            IsItemClickEnabled="True"
+                            ItemClick="ItemsList_ItemClick"
+                            ItemTemplate="{StaticResource ListItemViewModelTemplate}"
+                            ItemsSource="{Binding ElementName=GroupedItemsCVS, Path=View}"
+                            SelectionChanged="GroupedItemsList_SelectionChanged">
+                            <ListView.ItemContainerTransitions>
+                                <TransitionCollection />
+                            </ListView.ItemContainerTransitions>
+                            <ListView.GroupStyle>
+                                <!--<GroupStyle HeaderContainerStyle="{StaticResource CustomHeaderContainerStyle}" HidesIfEmpty="True">
+                                <GroupStyle.HeaderTemplate>
+                                    <DataTemplate>
+                                        <TextBlock
+                                            Padding="20,12,0,8"
+                                            AutomationProperties.AccessibilityView="Raw"
+                                            FontSize="14"
+                                            FontWeight="SemiBold"
+                                            Text="{x:Bind Key}"
+                                            Visibility="{x:Bind Key, Converter={StaticResource StringNotEmptyToVisibilityConverter}, Mode=OneWay}" />
+                                    </DataTemplate>
+                                </GroupStyle.HeaderTemplate>
+                            </GroupStyle>-->
+
+                                <GroupStyle HeaderContainerStyle="{StaticResource CustomHeaderContainerStyle}" HidesIfEmpty="True">
+                                    <GroupStyle.HeaderTemplate>
+                                        <DataTemplate>
+                                            <TextBlock
+                                                Margin="0,16,0,0"
+                                                Padding="20,8,0,4"
+                                                AutomationProperties.AccessibilityView="Raw"
+                                                FontSize="14"
+                                                FontWeight="SemiBold"
+                                                Foreground="{ThemeResource TextFillColorSecondaryBrush}"
+                                                Text="{Binding Key, Mode=OneWay}"
+                                                Visibility="{Binding Key, Converter={StaticResource StringVisibilityConverter}}" />
+                                        </DataTemplate>
+                                    </GroupStyle.HeaderTemplate>
+                                </GroupStyle>
+                            </ListView.GroupStyle>
+                        </ListView>
+                    </controls:Case>
+                    <controls:Case Value="False">
+                        <ListView
+                            x:Name="ItemsList"
+                            Padding="0,2,0,0"
+                            DoubleTapped="ItemsList_DoubleTapped"
+                            IsDoubleTapEnabled="True"
+                            IsItemClickEnabled="True"
+                            ItemClick="ItemsList_ItemClick"
+                            ItemTemplate="{StaticResource ListItemViewModelTemplate}"
+                            ItemsSource="{Binding ElementName=UngroupedItemsCVS, Path=View}"
+                            SelectionChanged="ItemsList_SelectionChanged">
+                            <ListView.ItemContainerTransitions>
+                                <TransitionCollection />
+                            </ListView.ItemContainerTransitions>
+                        </ListView>
+                    </controls:Case>
+                </controls:SwitchPresenter>
             </controls:Case>
             <controls:Case Value="True">
                 <StackPanel

src/modules/cmdpal/Microsoft.CmdPal.UI/ExtViews/ListPage.xaml.cs

@@ -37,6 +37,7 @@ public sealed partial class ListPage : Page,
         this.InitializeComponent();
         this.NavigationCacheMode = NavigationCacheMode.Disabled;
         this.ItemsList.Loaded += ItemsList_Loaded;
+        this.GroupedItemsList.Loaded += GroupedItemsList_Loaded;
     }
 
     protected override void OnNavigatedTo(NavigationEventArgs e)
@@ -121,6 +122,18 @@ public sealed partial class ListPage : Page,
         }
     }
 
+    private void GroupedItemsList_DoubleTapped(object sender, DoubleTappedRoutedEventArgs e)
+    {
+        if (GroupedItemsList.SelectedItem is ListItemViewModel vm)
+        {
+            var settings = App.Current.Services.GetService<SettingsModel>()!;
+            if (!settings.SingleClickActivates)
+            {
+                ViewModel?.InvokeItemCommand.Execute(vm);
+            }
+        }
+    }
+
     [System.Diagnostics.CodeAnalysis.SuppressMessage("CodeQuality", "IDE0051:Remove unused private members", Justification = "VS is too aggressive at pruning methods bound in XAML")]
     private void ItemsList_SelectionChanged(object sender, SelectionChangedEventArgs e)
     {
@@ -148,6 +161,24 @@ public sealed partial class ListPage : Page,
         }
     }
 
+    [System.Diagnostics.CodeAnalysis.SuppressMessage("CodeQuality", "IDE0051:Remove unused private members", Justification = "VS is too aggressive at pruning methods bound in XAML")]
+    private void GroupedItemsList_SelectionChanged(object sender, SelectionChangedEventArgs e)
+    {
+        if (GroupedItemsList.SelectedItem is ListItemViewModel item)
+        {
+            var vm = ViewModel;
+            _ = Task.Run(() =>
+            {
+                vm?.UpdateSelectedItemCommand.Execute(item);
+            });
+        }
+
+        if (GroupedItemsList.SelectedItem != null)
+        {
+            GroupedItemsList.ScrollIntoView(GroupedItemsList.SelectedItem);
+        }
+    }
+
     private void ItemsList_Loaded(object sender, RoutedEventArgs e)
     {
         // Find the ScrollViewer in the ListView
@@ -159,6 +190,17 @@ public sealed partial class ListPage : Page,
         }
     }
 
+    private void GroupedItemsList_Loaded(object sender, RoutedEventArgs e)
+    {
+        // Find the ScrollViewer in the ListView
+        var listViewScrollViewer = FindScrollViewer(this.GroupedItemsList);
+
+        if (listViewScrollViewer != null)
+        {
+            listViewScrollViewer.ViewChanged += ListViewScrollViewer_ViewChanged;
+        }
+    }
+
     private void ListViewScrollViewer_ViewChanged(object? sender, ScrollViewerViewChangedEventArgs e)
     {
         var scrollView = sender as ScrollViewer;
@@ -187,6 +229,11 @@ public sealed partial class ListPage : Page,
         {
             ItemsList.SelectedIndex++;
         }
+
+        if (GroupedItemsList.SelectedIndex < GroupedItemsList.Items.Count - 1)
+        {
+            GroupedItemsList.SelectedIndex++;
+        }
     }
 
     public void Receive(NavigatePreviousCommand message)
@@ -195,6 +242,11 @@ public sealed partial class ListPage : Page,
         {
             ItemsList.SelectedIndex--;
         }
+
+        if (GroupedItemsList.SelectedIndex > 0)
+        {
+            GroupedItemsList.SelectedIndex--;
+        }
     }
 
     public void Receive(ActivateSelectedListItemMessage message)
@@ -207,6 +259,10 @@ public sealed partial class ListPage : Page,
         {
             ViewModel?.InvokeItemCommand.Execute(item);
         }
+        else if (GroupedItemsList.SelectedItem is ListItemViewModel groupedItem)
+        {
+            ViewModel?.InvokeItemCommand.Execute(groupedItem);
+        }
     }
 
     public void Receive(ActivateSecondaryCommandMessage message)
@@ -219,6 +275,10 @@ public sealed partial class ListPage : Page,
         {
             ViewModel?.InvokeSecondaryCommandCommand.Execute(item);
         }
+        else if (GroupedItemsList.SelectedItem is ListItemViewModel groupedItem)
+        {
+            ViewModel?.InvokeSecondaryCommandCommand.Execute(groupedItem);
+        }
     }
 
     private static void OnViewModelChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
@@ -247,6 +307,11 @@ public sealed partial class ListPage : Page,
     // GetItems or a change in the filter.
     private void Page_ItemsUpdated(ListViewModel sender, object args)
     {
+        if (ViewModel != null)
+        {
+            ViewModel?.UpdateGroupsIfNeeded();
+        }
+
         // If for some reason, we don't have a selected item, fix that.
         //
         // It's important to do this here, because once there's no selection
@@ -258,6 +323,11 @@ public sealed partial class ListPage : Page,
         {
             ItemsList.SelectedIndex = 0;
         }
+
+        if (GroupedItemsList.SelectedItem == null)
+        {
+            GroupedItemsList.SelectedIndex = 0;
+        }
     }
 
     private void ViewModel_PropertyChanged(object? sender, System.ComponentModel.PropertyChangedEventArgs e)

src/modules/cmdpal/Microsoft.CmdPal.UI/Styles/Generic.xaml

@@ -0,0 +1,29 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+
+    <!--  Using custom style to remove header divider from list view headers  -->
+    <Style x:Key="CustomHeaderContainerStyle" TargetType="ListViewHeaderItem">
+        <Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}" />
+        <Setter Property="FontSize" Value="{ThemeResource ListViewHeaderItemThemeFontSize}" />
+        <Setter Property="Background" Value="Transparent" />
+        <Setter Property="Margin" Value="0,0,0,0" />
+        <Setter Property="Padding" Value="12,8,12,0" />
+        <Setter Property="HorizontalContentAlignment" Value="Left" />
+        <Setter Property="VerticalContentAlignment" Value="Center" />
+        <Setter Property="MinHeight" Value="0" />
+        <Setter Property="UseSystemFocusVisuals" Value="True" />
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="ListViewHeaderItem">
+                    <ContentPresenter
+                        x:Name="ContentPresenter"
+                        HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
+                        VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
+                        Background="{TemplateBinding Background}"
+                        Content="{TemplateBinding Content}"
+                        ContentTemplate="{TemplateBinding ContentTemplate}"
+                        ContentTransitions="{TemplateBinding ContentTransitions}" />
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+</ResourceDictionary>

src/modules/cmdpal/exts/SamplePagesExtension/Pages/FizzBuzzListPage.cs

@@ -0,0 +1,90 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Collections.Generic;
+using Microsoft.CommandPalette.Extensions;
+using Microsoft.CommandPalette.Extensions.Toolkit;
+
+namespace SamplePagesExtension;
+
+internal sealed partial class FizzBuzzListPage : ListPage
+{
+    public override string Title => "FizzBuzz Page";
+
+    public override IconInfo Icon => new("\uE94C"); // % symbol
+
+    public override string Name => "Open";
+
+    private readonly List<ListItem> _items;
+
+    internal FizzBuzzListPage()
+    {
+        var addNewItem = new ListItem(new AnonymousCommand(() =>
+        {
+            var c = _items.Count;
+            var f = c % 3 == 0;
+            var b = c % 5 == 0;
+            var s = string.Empty;
+            if (f)
+            {
+                s += "Fizz";
+            }
+
+            if (b)
+            {
+                s += "Buzz";
+            }
+
+            _items.Add(new ListItem(new NoOpCommand())
+            {
+                Title = $"{c}",
+                Icon = IconFromIndex(_items.Count),
+                Section = s,
+            });
+            RaiseItemsChanged();
+        })
+        { Result = CommandResult.KeepOpen() })
+        {
+            Title = "Add item",
+            Subtitle = "Each item will be sorted into sections. Add at least three",
+            Icon = new IconInfo("\uED0E"),
+        };
+
+        _items = [addNewItem];
+    }
+
+    public override IListItem[] GetItems()
+    {
+        return _items.ToArray();
+    }
+
+    private IconInfo IconFromIndex(int index)
+    {
+        return _icons[index % _icons.Length];
+    }
+
+    private readonly IconInfo[] _icons =
+        [
+            new IconInfo("\ue700"),
+            new IconInfo("\ue701"),
+            new IconInfo("\ue702"),
+            new IconInfo("\ue703"),
+            new IconInfo("\ue704"),
+            new IconInfo("\ue705"),
+            new IconInfo("\ue706"),
+            new IconInfo("\ue707"),
+            new IconInfo("\ue708"),
+            new IconInfo("\ue709"),
+            new IconInfo("\ue70a"),
+            new IconInfo("\ue70b"),
+            new IconInfo("\ue70c"),
+            new IconInfo("\ue70d"),
+            new IconInfo("\ue70e"),
+            new IconInfo("\ue70f"),
+            new IconInfo("\ue710"),
+            new IconInfo("\ue711"),
+            new IconInfo("\ue712"),
+            new IconInfo("\ue713"),
+        ];
+}