Initial commit: FluidExplorer：从零实现的 WinUI 3 文件资源管理器替代品（Mica、命令栏、面包屑）

2026-09-19 11:54:03 +08:00
commit 5780fde61a
60 changed files with 15035 additions and 0 deletions
@@ -0,0 +1,98 @@
+using System.ComponentModel;
+using FluidExplorer.ViewModels;
+using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Controls;
+using Microsoft.UI.Xaml.Input;
+
+namespace FluidExplorer.Views;
+
+/// <summary>一个标签页的宿主：负责单/双窗格布局与中间分隔条。</summary>
+public sealed partial class ExplorerTabView : UserControl
+{
+    private bool _dragging;
+    private double _startX;
+    private double _startFirstWidth;
+    private double _startSecondWidth;
+
+    public ExplorerTabView()
+    {
+        InitializeComponent();
+        Loaded += (_, _) => UpdatePaneLayout();
+    }
+
+    public static readonly DependencyProperty TabViewModelProperty = DependencyProperty.Register(
+        nameof(TabViewModel),
+        typeof(ExplorerTabViewModel),
+        typeof(ExplorerTabView),
+        new PropertyMetadata(null, OnTabChanged));
+
+    public ExplorerTabViewModel? TabViewModel
+    {
+        get => (ExplorerTabViewModel?)GetValue(TabViewModelProperty);
+        set => SetValue(TabViewModelProperty, value);
+    }
+
+    private static void OnTabChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+    {
+        var view = (ExplorerTabView)d;
+        if (e.OldValue is ExplorerTabViewModel old) old.PropertyChanged -= view.OnTabPropertyChanged;
+        if (e.NewValue is ExplorerTabViewModel tab) tab.PropertyChanged += view.OnTabPropertyChanged;
+        view.UpdatePaneLayout();
+    }
+
+    private void OnTabPropertyChanged(object? sender, PropertyChangedEventArgs e)
+    {
+        if (e.PropertyName == nameof(ExplorerTabViewModel.IsDualPane)) UpdatePaneLayout();
+    }
+
+    private void UpdatePaneLayout()
+    {
+        var dual = TabViewModel?.IsDualPane == true;
+
+        if (dual)
+        {
+            Splitter.Visibility = Visibility.Visible;
+            SecondaryPaneView.Visibility = Visibility.Visible;
+            SplitterColumn.Width = new GridLength(4);
+            if (FirstColumn.Width.IsAbsolute && SecondColumn.Width.IsAbsolute) return;
+            FirstColumn.Width = new GridLength(1, GridUnitType.Star);
+            SecondColumn.Width = new GridLength(1, GridUnitType.Star);
+        }
+        else
+        {
+            Splitter.Visibility = Visibility.Collapsed;
+            SecondaryPaneView.Visibility = Visibility.Collapsed;
+            SplitterColumn.Width = new GridLength(0);
+            FirstColumn.Width = new GridLength(1, GridUnitType.Star);
+            SecondColumn.Width = new GridLength(0);
+        }
+    }
+
+    private void OnSplitterPointerPressed(object sender, PointerRoutedEventArgs e)
+    {
+        _dragging = true;
+        _startX = e.GetCurrentPoint(LayoutRoot).Position.X;
+        _startFirstWidth = FirstColumn.ActualWidth;
+        _startSecondWidth = SecondColumn.ActualWidth;
+        Splitter.CapturePointer(e.Pointer);
+    }
+
+    private void OnSplitterPointerMoved(object sender, PointerRoutedEventArgs e)
+    {
+        if (!_dragging) return;
+        var delta = e.GetCurrentPoint(LayoutRoot).Position.X - _startX;
+        var total = _startFirstWidth + _startSecondWidth;
+        const double min = 240;
+
+        var first = Math.Clamp(_startFirstWidth + delta, min, total - min);
+        FirstColumn.Width = new GridLength(first, GridUnitType.Pixel);
+        SecondColumn.Width = new GridLength(total - first, GridUnitType.Pixel);
+    }
+
+    private void OnSplitterPointerReleased(object sender, PointerRoutedEventArgs e)
+    {
+        if (!_dragging) return;
+        _dragging = false;
+        Splitter.ReleasePointerCapture(e.Pointer);
+    }
+}