优化更新代码，添加界面功能并整合

WPFluent/Controls/ListView/ListView..cs

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+
+
+
+namespace WPFluent.Controls;
+
+/// <summary>
+/// Extends <see cref="System.Windows.Controls.ListView"/>, and adds customized support <see
+/// cref="ListViewViewState.GridView"/> or <see cref="ListViewViewState.Default"/>.
+/// </summary>
+/// <example>
+/// <code lang="xml"> /// &lt;ui:ListView ItemsSource="{Binding ...}" &gt; ///     &lt;ui:ListView.View&gt; ///        
+/// &lt;ui:GridView&gt; ///             &lt;GridViewColumn ///                 DisplayMemberBinding="{Binding
+/// FirstName}" ///                 Header="First Name" /&gt; ///             &lt;GridViewColumn ///                
+/// DisplayMemberBinding="{Binding LastName}" ///                 Header="Last Name" /&gt; ///        
+/// &lt;/ui:GridView&gt; ///     &lt;/ui:ListView.View&gt; /// &lt;/ui:ListView&gt; ///</code>
+/// </example>
+public class ListView : System.Windows.Controls.ListView
+{
+    /// <summary>
+    /// Identifies the <see cref="ViewState"/> dependency property.
+    /// </summary>
+    public static readonly DependencyProperty ViewStateProperty = DependencyProperty.Register(
+        nameof(ViewState),
+        typeof(ListViewViewState),
+        typeof(ListView),
+        new FrameworkPropertyMetadata(ListViewViewState.Default, OnViewStateChanged));
+    private DependencyPropertyDescriptor? _descriptor;
+
+    static ListView()
+    { DefaultStyleKeyProperty.OverrideMetadata(typeof(ListView), new FrameworkPropertyMetadata(typeof(ListView))); }
+
+    public ListView()
+    {
+        Loaded += OnLoaded;
+        Unloaded += OnUnloaded;
+    }
+
+    private void OnLoaded(object sender, RoutedEventArgs e)
+    {
+        Loaded -= OnLoaded; // prevent memory leaks
+
+        // Setup initial ViewState and hook into View property changes
+        _descriptor = DependencyPropertyDescriptor.FromProperty(
+            System.Windows.Controls.ListView.ViewProperty,
+            typeof(System.Windows.Controls.ListView));
+        _descriptor?.AddValueChanged(this, OnViewPropertyChanged);
+        UpdateViewState(); // set the initial state
+    }
+
+    private void OnUnloaded(object sender, RoutedEventArgs e)
+    {
+        Unloaded -= OnUnloaded;
+
+        _descriptor?.RemoveValueChanged(this, OnViewPropertyChanged);
+    }
+
+    private void OnViewPropertyChanged(object? sender, EventArgs e) { UpdateViewState(); }
+
+    private static void OnViewStateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+    {
+        if(d is not ListView self)
+        {
+            return;
+        }
+
+        self.OnViewStateChanged(e);
+    }
+
+    private void UpdateViewState()
+    {
+        ListViewViewState viewState = View switch
+        {
+            System.Windows.Controls.GridView => ListViewViewState.GridView,
+            null => ListViewViewState.Default,
+            _ => ListViewViewState.Default,
+        };
+
+        SetCurrentValue(ViewStateProperty, viewState);
+    }
+
+    protected override DependencyObject GetContainerForItemOverride() { return new ListViewItem(); }
+
+    protected override bool IsItemItsOwnContainerOverride(object item) { return item is ListViewItem; }
+
+    protected virtual void OnViewStateChanged(DependencyPropertyChangedEventArgs e)
+    {
+        // Hook for derived classes to react to ViewState property changes
+    }
+
+    /// <summary>
+    /// Gets or sets the view state of the <see cref="ListView"/>, enabling custom logic based on the current view.
+    /// </summary>
+    /// <value>The current view state of the <see cref="ListView"/>.</value>
+    public ListViewViewState ViewState
+    {
+        get => (ListViewViewState)GetValue(ViewStateProperty);
+        set => SetValue(ViewStateProperty, value);
+    }
+}

WPFluent/Controls/ListView/ListView.xaml

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+<!--
+    This Source Code Form is subject to the terms of the MIT License.
+    If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
+    Copyright (C) Leszek Pomianowski and WPF UI Contributors.
+    All Rights Reserved.
+-->
+
+<ResourceDictionary
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:controls="clr-namespace:WPFluent.Controls">
+
+    <ControlTemplate x:Key="NullViewTemplate" TargetType="{x:Type controls:ListView}">
+        <Grid>
+            <controls:PassiveScrollViewer
+                x:Name="PART_ContentHost"
+                CanContentScroll="{TemplateBinding ScrollViewer.CanContentScroll}"
+                HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}"
+                VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}">
+                <ItemsPresenter />
+            </controls:PassiveScrollViewer>
+            <Rectangle
+                x:Name="PART_DisabledVisual"
+                Opacity="0"
+                RadiusX="2"
+                RadiusY="2"
+                Stretch="Fill"
+                Stroke="Transparent"
+                StrokeThickness="0"
+                Visibility="Collapsed">
+                <Rectangle.Fill>
+                    <SolidColorBrush Color="{DynamicResource ControlFillColorDefault}" />
+                </Rectangle.Fill>
+            </Rectangle>
+        </Grid>
+        <ControlTemplate.Triggers>
+            <Trigger Property="IsGrouping" Value="True">
+                <Setter Property="ScrollViewer.CanContentScroll" Value="False" />
+            </Trigger>
+            <Trigger Property="IsEnabled" Value="False">
+                <Setter TargetName="PART_DisabledVisual" Property="Visibility" Value="Visible" />
+            </Trigger>
+        </ControlTemplate.Triggers>
+    </ControlTemplate>
+
+    <ControlTemplate x:Key="GridViewScrollViewerTemplate" TargetType="ScrollViewer">
+        <Grid Background="Transparent">
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="*" />
+                <ColumnDefinition Width="Auto" />
+            </Grid.ColumnDefinitions>
+            <Grid.RowDefinitions>
+                <RowDefinition Height="*" />
+                <RowDefinition Height="Auto" />
+            </Grid.RowDefinitions>
+            <DockPanel Margin="{TemplateBinding Control.Padding}">
+                <ScrollViewer
+                    DockPanel.Dock="Top"
+                    Focusable="False"
+                    HorizontalScrollBarVisibility="Hidden"
+                    VerticalScrollBarVisibility="Hidden">
+                    <!--  margin-left matched to listviewitem.padding  -->
+                    <controls:GridViewHeaderRowPresenter
+                        Margin="4"
+                        AllowsColumnReorder="{Binding Path=View.AllowsColumnReorder, RelativeSource={RelativeSource AncestorType=ListView}}"
+                        ColumnHeaderContainerStyle="{Binding Path=View.ColumnHeaderContainerStyle, RelativeSource={RelativeSource AncestorType=ListView}}"
+                        ColumnHeaderContextMenu="{Binding Path=View.ColumnHeaderContextMenu, RelativeSource={RelativeSource AncestorType=ListView}}"
+                        ColumnHeaderTemplate="{Binding Path=View.ColumnHeaderTemplate, RelativeSource={RelativeSource AncestorType=ListView}}"
+                        ColumnHeaderToolTip="{Binding Path=View.ColumnHeaderToolTip, RelativeSource={RelativeSource AncestorType=ListView}}"
+                        Columns="{Binding Path=View.Columns, RelativeSource={RelativeSource AncestorType=ListView}}"
+                        SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
+                </ScrollViewer>
+                <ScrollContentPresenter
+                    Name="PART_ScrollContentPresenter"
+                    CanContentScroll="{TemplateBinding ScrollViewer.CanContentScroll}"
+                    CanHorizontallyScroll="False"
+                    CanVerticallyScroll="False"
+                    Content="{TemplateBinding ContentControl.Content}"
+                    ContentTemplate="{TemplateBinding ContentControl.ContentTemplate}"
+                    KeyboardNavigation.DirectionalNavigation="Local"
+                    SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
+            </DockPanel>
+            <ScrollBar
+                Name="PART_HorizontalScrollBar"
+                Grid.Row="1"
+                Cursor="Arrow"
+                Maximum="{TemplateBinding ScrollViewer.ScrollableWidth}"
+                Minimum="0"
+                Orientation="Horizontal"
+                Visibility="{TemplateBinding ScrollViewer.ComputedHorizontalScrollBarVisibility}"
+                Value="{Binding Path=HorizontalOffset, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}" />
+            <ScrollBar
+                Name="PART_VerticalScrollBar"
+                Grid.Column="1"
+                Cursor="Arrow"
+                Maximum="{TemplateBinding ScrollViewer.ScrollableHeight}"
+                Minimum="0"
+                Orientation="Vertical"
+                Visibility="{TemplateBinding ScrollViewer.ComputedVerticalScrollBarVisibility}"
+                Value="{Binding Path=VerticalOffset, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}" />
+            <DockPanel
+                Grid.Row="1"
+                Grid.Column="1"
+                LastChildFill="False">
+                <Rectangle
+                    Width="1"
+                    DockPanel.Dock="Left"
+                    Fill="#FFFFFFFF"
+                    Visibility="{TemplateBinding ScrollViewer.ComputedVerticalScrollBarVisibility}" />
+                <Rectangle
+                    Height="1"
+                    DockPanel.Dock="Top"
+                    Fill="#FFFFFFFF"
+                    Visibility="{TemplateBinding ScrollViewer.ComputedHorizontalScrollBarVisibility}" />
+            </DockPanel>
+        </Grid>
+    </ControlTemplate>
+
+    <ControlTemplate x:Key="GridViewTemplate" TargetType="{x:Type controls:ListView}">
+        <Border
+            Name="Bd"
+            Background="Transparent"
+            BorderBrush="{TemplateBinding Border.BorderBrush}"
+            BorderThickness="{TemplateBinding Border.BorderThickness}">
+            <controls:PassiveScrollViewer
+                Padding="{TemplateBinding Control.Padding}"
+                CanContentScroll="{TemplateBinding ScrollViewer.CanContentScroll}"
+                Focusable="False"
+                Template="{DynamicResource GridViewScrollViewerTemplate}">
+                <ItemsPresenter />
+            </controls:PassiveScrollViewer>
+        </Border>
+        <ControlTemplate.Triggers>
+            <Trigger Property="IsEnabled" Value="False">
+                <Setter TargetName="Bd" Property="Background" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}" />
+            </Trigger>
+        </ControlTemplate.Triggers>
+    </ControlTemplate>
+
+    <Style x:Key="ListViewStyle" TargetType="{x:Type controls:ListView}">
+        <Setter Property="Margin" Value="0" />
+        <Setter Property="Padding" Value="0" />
+        <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto" />
+        <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto" />
+        <Setter Property="ScrollViewer.CanContentScroll" Value="True" />
+        <Setter Property="VerticalContentAlignment" Value="Center" />
+        <Setter Property="VirtualizingPanel.IsVirtualizing" Value="True" />
+        <Setter Property="VirtualizingPanel.VirtualizationMode" Value="Standard" />
+        <Setter Property="SnapsToDevicePixels" Value="True" />
+        <Style.Triggers>
+            <DataTrigger Binding="{Binding Path=ViewState, RelativeSource={RelativeSource Mode=Self}}" Value="{x:Static controls:ListViewViewState.Default}">
+                <Setter Property="ItemsPanel">
+                    <Setter.Value>
+                        <ItemsPanelTemplate>
+                            <VirtualizingStackPanel IsVirtualizing="{TemplateBinding VirtualizingPanel.IsVirtualizing}" VirtualizationMode="{TemplateBinding VirtualizingPanel.VirtualizationMode}" />
+                        </ItemsPanelTemplate>
+                    </Setter.Value>
+                </Setter>
+                <Setter Property="Template" Value="{DynamicResource NullViewTemplate}" />
+            </DataTrigger>
+            <DataTrigger Binding="{Binding Path=ViewState, RelativeSource={RelativeSource Mode=Self}}" Value="{x:Static controls:ListViewViewState.GridView}">
+                <Setter Property="Template" Value="{DynamicResource GridViewTemplate}" />
+            </DataTrigger>
+        </Style.Triggers>
+    </Style>
+
+    <Style BasedOn="{StaticResource ListViewStyle}" TargetType="{x:Type controls:ListView}" />
+
+</ResourceDictionary>

WPFluent/Controls/ListView/ListViewItem.cs

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+
+
+
+namespace WPFluent.Controls;
+
+public class ListViewItem : System.Windows.Controls.ListViewItem
+{
+}

WPFluent/Controls/ListView/ListViewItem.xaml

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+<!--
+    This Source Code Form is subject to the terms of the MIT License.
+    If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
+    Copyright (C) Leszek Pomianowski and WPF UI Contributors.
+    All Rights Reserved.
+-->
+
+<ResourceDictionary
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:controls="clr-namespace:WPFluent.Controls">
+
+    <ControlTemplate x:Key="NullViewItemTemplate" TargetType="{x:Type controls:ListViewItem}">
+        <Border
+            x:Name="Border"
+            Margin="0"
+            Padding="0"
+            Background="Transparent"
+            BorderThickness="1"
+            CornerRadius="{TemplateBinding Border.CornerRadius}">
+            <Grid>
+                <ContentPresenter Margin="{TemplateBinding Padding}" />
+                <Rectangle
+                    x:Name="ActiveRectangle"
+                    Width="3"
+                    Height="18"
+                    Margin="0"
+                    HorizontalAlignment="Left"
+                    VerticalAlignment="Center"
+                    Fill="{DynamicResource ListViewItemPillFillBrush}"
+                    RadiusX="2"
+                    RadiusY="2"
+                    Visibility="Collapsed" />
+            </Grid>
+        </Border>
+        <ControlTemplate.Triggers>
+            <MultiTrigger>
+                <MultiTrigger.Conditions>
+                    <Condition Property="IsEnabled" Value="True" />
+                    <Condition Property="IsMouseOver" Value="True" />
+                </MultiTrigger.Conditions>
+                <Setter TargetName="Border" Property="Background" Value="{DynamicResource ListViewItemBackgroundPointerOver}" />
+            </MultiTrigger>
+            <Trigger Property="IsSelected" Value="True">
+                <Setter TargetName="ActiveRectangle" Property="Visibility" Value="Visible" />
+                <Setter TargetName="Border" Property="Background" Value="{DynamicResource ListViewItemBackgroundPointerOver}" />
+            </Trigger>
+        </ControlTemplate.Triggers>
+    </ControlTemplate>
+
+    <ControlTemplate x:Key="GridViewItemTemplate" TargetType="{x:Type controls:ListViewItem}">
+        <Border
+            x:Name="Border"
+            Margin="0"
+            Padding="0"
+            Background="Transparent"
+            BorderBrush="{TemplateBinding Border.BorderBrush}"
+            BorderThickness="{TemplateBinding Border.BorderThickness}"
+            CornerRadius="{TemplateBinding Border.CornerRadius}">
+            <Grid>
+                <controls:GridViewRowPresenter
+                    Margin="{TemplateBinding Padding}"
+                    VerticalAlignment="{TemplateBinding Control.VerticalContentAlignment}"
+                    Columns="{TemplateBinding GridView.ColumnCollection}"
+                    Content="{TemplateBinding ContentControl.Content}" />
+                <Rectangle
+                    x:Name="ActiveRectangle"
+                    Width="3"
+                    Height="18"
+                    Margin="0"
+                    HorizontalAlignment="Left"
+                    VerticalAlignment="Center"
+                    Fill="{DynamicResource ListViewItemPillFillBrush}"
+                    RadiusX="2"
+                    RadiusY="2"
+                    Visibility="Collapsed" />
+            </Grid>
+        </Border>
+        <ControlTemplate.Triggers>
+            <MultiTrigger>
+                <MultiTrigger.Conditions>
+                    <Condition Property="IsEnabled" Value="True" />
+                    <Condition Property="IsMouseOver" Value="True" />
+                </MultiTrigger.Conditions>
+                <Setter TargetName="Border" Property="Background" Value="{DynamicResource ListViewItemBackgroundPointerOver}" />
+            </MultiTrigger>
+            <Trigger Property="IsSelected" Value="True">
+                <Setter TargetName="ActiveRectangle" Property="Visibility" Value="Visible" />
+                <Setter TargetName="Border" Property="Background" Value="{DynamicResource ListViewItemBackgroundPointerOver}" />
+            </Trigger>
+        </ControlTemplate.Triggers>
+    </ControlTemplate>
+
+    <Style x:Key="ListViewItemStyle" TargetType="{x:Type controls:ListViewItem}">
+        <Setter Property="Foreground" Value="{DynamicResource ListViewItemForeground}" />
+        <Setter Property="Background" Value="Transparent" />
+        <Setter Property="Border.CornerRadius" Value="{DynamicResource ControlCornerRadius}" />
+        <Setter Property="Margin" Value="0,0,0,2" />
+        <Setter Property="Padding" Value="4" />
+        <Style.Triggers>
+            <DataTrigger Binding="{Binding Path=ViewState, RelativeSource={RelativeSource AncestorType={x:Type ListView}}}" Value="Default">
+                <Setter Property="Template" Value="{DynamicResource NullViewItemTemplate}" />
+            </DataTrigger>
+            <DataTrigger Binding="{Binding Path=ViewState, RelativeSource={RelativeSource AncestorType={x:Type ListView}}}" Value="GridView">
+                <Setter Property="Template" Value="{DynamicResource GridViewItemTemplate}" />
+            </DataTrigger>
+        </Style.Triggers>
+    </Style>
+
+    <Style BasedOn="{StaticResource ListViewItemStyle}" TargetType="{x:Type controls:ListViewItem}" />
+
+</ResourceDictionary>

WPFluent/Controls/ListView/ListViewViewState.cs

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+
+
+
+namespace WPFluent.Controls;
+
+public enum ListViewViewState
+{
+    Default,
+    GridView,
+}