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@ -9,13 +9,18 @@ public partial class MainPage : ContentPage, INotifyPropertyChanged
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{
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private readonly IFileSystemService _fileService;
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// Коллекции больше не нужны для привязки, но оставим для логики
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public ObservableCollection<FileSystemItem> LeftItems { get; } = new();
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public ObservableCollection<FileSystemItem> RightItems { get; } = new();
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private string _leftPath = string.Empty;
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private string _rightPath = string.Empty;
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// Для управления выделением и фокусом
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private Button? _currentFocusedButton;
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private bool _isLeftPanelActive = true;
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private int _leftSelectedIndex = -1;
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private int _rightSelectedIndex = -1;
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public string LeftPath
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{
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get => _leftPath;
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@ -48,111 +53,195 @@ public partial class MainPage : ContentPage, INotifyPropertyChanged
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private FileSystemItem? _selectedLeftItem;
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private FileSystemItem? _selectedRightItem;
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// Для двойного нажатия
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private FileSystemItem? _lastClickedItem;
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private bool? _lastIsLeftPanel;
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public MainPage(IFileSystemService fileService)
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{
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InitializeComponent();
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_fileService = fileService;
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BindingContext = this;
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// Инициализация шаблонов
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InitializeCollectionViews();
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var root = _fileService.GetRootPath();
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LoadDirectory(root, true);
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LoadDirectory(root, false);
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// Устанавливаем фокус на страницу
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this.Focus();
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}
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private void LoadDirectory(string path, bool isLeft)
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private void InitializeCollectionViews()
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{
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var items = _fileService.GetDirectoryContents(path).ToList();
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var panel = isLeft ? LeftPanel : RightPanel;
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var targetItems = isLeft ? LeftItems : RightItems;
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var currentPathProperty = isLeft ? nameof(_currentLeftPath) : nameof(_currentRightPath);
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LeftPanel.ItemTemplate = PanelCollectionView.CreateItemTemplate(isLeftPanel: true, page: this);
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RightPanel.ItemTemplate = PanelCollectionView.CreateItemTemplate(isLeftPanel: true, page: this);
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}
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// Очистка панели
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panel.Clear();
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targetItems.Clear();
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// Заполнение
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foreach (var item in items)
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{
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targetItems.Add(item);
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protected override void OnHandlerChanged()
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{
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base.OnHandlerChanged();
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this.Focus();
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}
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var button = new Button
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public void HandleItemClick(FileSystemItem item, bool isLeftPanel)
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{
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if (_lastIsLeftPanel == isLeftPanel && _lastClickedItem == item)
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{
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// Двойной клик
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if (isLeftPanel)
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OnLeftItemDoubleTapped(item);
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else
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OnRightItemDoubleTapped(item);
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}
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else
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{
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// Одинарный клик - выделение
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if (isLeftPanel)
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{
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Text = item.DisplayText,
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TextColor = Colors.Black,
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Padding = new Thickness(10),
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HeightRequest = 40,
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BackgroundColor = Colors.Transparent,
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BorderWidth = 0,
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CommandParameter = item
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};
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button.Clicked += isLeft ? OnLeftItemActivated : OnRightItemActivated;
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// Добавляем визуальные состояния
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var normal = new VisualState { Name = "Normal" };
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var focused = new VisualState { Name = "Focused" };
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focused.Setters.Add(new Setter { Property = Button.BorderColorProperty, Value = Colors.Black });
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focused.Setters.Add(new Setter { Property = Button.BorderWidthProperty, Value = 2 });
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var pressed = new VisualState { Name = "Pressed" };
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pressed.Setters.Add(new Setter { Property = Button.BackgroundColorProperty, Value = Color.FromArgb("#e0e0e0") });
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var commonStates = new VisualStateGroup { Name = "CommonStates" };
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commonStates.States.Add(normal);
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commonStates.States.Add(focused);
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commonStates.States.Add(pressed);
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var groups = new VisualStateGroupList();
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groups.Add(commonStates);
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VisualStateManager.SetVisualStateGroups(button, groups);
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panel.Add(button);
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_isLeftPanelActive = true;
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_leftSelectedIndex = LeftItems.IndexOf(item);
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_selectedLeftItem = item;
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_selectedRightItem = null;
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}
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else
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{
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_isLeftPanelActive = false;
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_rightSelectedIndex = RightItems.IndexOf(item);
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_selectedRightItem = item;
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_selectedLeftItem = null;
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}
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UpdateVisualSelection();
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}
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_lastIsLeftPanel = isLeftPanel;
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_lastClickedItem = item;
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}
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private void LoadDirectory(string path, bool isLeft)
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{
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var items = _fileService.GetDirectoryContents(path).ToList();
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// Обновление пути
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if (isLeft)
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{
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LeftItems.Clear();
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foreach (var item in items) LeftItems.Add(item);
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_currentLeftPath = path;
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LeftPath = path;
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// Сбрасываем выделение при загрузке новой директории
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_leftSelectedIndex = items.Count > 0 ? 0 : -1;
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}
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else
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{
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RightItems.Clear();
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foreach (var item in items) RightItems.Add(item);
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_currentRightPath = path;
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RightPath = path;
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_rightSelectedIndex = items.Count > 0 ? 0 : -1;
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}
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UpdateVisualSelection();
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}
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private void OnLeftItemActivated(object sender, EventArgs e)
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// Обработчики выделения (вызываются при изменении Selection в CollectionView)
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private void OnLeftSelectionChanged(object sender, SelectionChangedEventArgs e)
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{
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var button = (Button)sender;
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var item = (FileSystemItem)button.CommandParameter;
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// Обновляем индексы при программном изменении selection
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if (e.CurrentSelection.FirstOrDefault() is FileSystemItem selectedItem)
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{
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_leftSelectedIndex = LeftItems.IndexOf(selectedItem);
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_isLeftPanelActive = true;
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UpdateVisualSelection();
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}
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}
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_selectedLeftItem = item;
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_selectedRightItem = null;
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private void OnRightSelectionChanged(object sender, SelectionChangedEventArgs e)
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{
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if (e.CurrentSelection.FirstOrDefault() is FileSystemItem selectedItem)
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{
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_rightSelectedIndex = RightItems.IndexOf(selectedItem);
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_isLeftPanelActive = false;
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UpdateVisualSelection();
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}
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}
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if (item.IsDirectory)
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private void UpdateVisualSelection()
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{
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//Сбрасываем предыдущий фокус
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if (_currentFocusedButton != null)
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{
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LoadDirectory(item.FullName, true);
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VisualStateManager.GoToState(_currentFocusedButton, "Normal");
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_currentFocusedButton = null;
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}
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if (_isLeftPanelActive && _leftSelectedIndex >= 0 && _leftSelectedIndex < LeftItems.Count)
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{
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var item = LeftItems[_leftSelectedIndex];
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SetFocusToItem(LeftPanel, item);
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_selectedLeftItem = item;
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_selectedRightItem = null;
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}
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else if (!_isLeftPanelActive && _rightSelectedIndex >= 0 && _rightSelectedIndex < RightItems.Count)
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{
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var item = RightItems[_rightSelectedIndex];
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SetFocusToItem(RightPanel, item);
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_selectedRightItem = item;
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_selectedLeftItem = null;
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}
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}
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private void OnRightItemActivated(object sender, EventArgs e)
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private void SetFocusToItem(CollectionView collectionView, FileSystemItem item)
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{
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var button = (Button)sender;
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var item = (FileSystemItem)button.CommandParameter;
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// Используем Dispatcher чтобы дождаться рендеринга
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Dispatcher.Dispatch(() =>
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{
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var container = FindButtonContainer(collectionView, item);
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if (container is Button button)
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{
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VisualStateManager.GoToState(button, "Focused");
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_currentFocusedButton = button;
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_lastClickedItem = item;
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_selectedRightItem = item;
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_selectedLeftItem = null;
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// Прокручиваем к выбранному элементу
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collectionView.ScrollTo(item, position: ScrollToPosition.MakeVisible, animate: false);
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}
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});
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}
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private Button? FindButtonContainer(CollectionView collectionView, FileSystemItem item)
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{
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// Ищем кнопку в логических дочерних элементах
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foreach (var child in collectionView.LogicalChildren)
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{
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if (child is Button button && button.BindingContext == item)
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{
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return button;
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}
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}
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return null;
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}
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public void OnLeftItemDoubleTapped(FileSystemItem item)
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{
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if (item.IsDirectory)
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{
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LoadDirectory(item.FullName, true);
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}
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}
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public void OnRightItemDoubleTapped(FileSystemItem item)
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{
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if (item.IsDirectory)
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{
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LoadDirectory(item.FullName, false);
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_selectedRightItem = null;
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}
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}
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// Остальные методы без изменений
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private async void OnCopyClicked(object sender, EventArgs e)
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{
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await ProcessFileOperation(async (src, destDir) =>
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Stepan Pilipenko
4 weeks ago