From b486f16f4a47bdbd04571b3e97c466e950f82529 Mon Sep 17 00:00:00 2001
From: Stepan Pilipenko <stepan.pilipenko@gmail.com>
Date: Tue, 11 Nov 2025 21:40:38 +0300
Subject: [PATCH] double tap

---
 FileSystemItem.cs |  27 +++++++++-
 MainPage.xaml     |  85 ++++++++++++++----------------
 MainPage.xaml.cs  | 129 +++++++++++++++++++++++++++++++++++++++++++---
 3 files changed, 185 insertions(+), 56 deletions(-)

diff --git a/FileSystemItem.cs b/FileSystemItem.cs
index e62c415..047e305 100644
--- a/FileSystemItem.cs
+++ b/FileSystemItem.cs
@@ -1,10 +1,33 @@
-namespace CommanderApp
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace CommanderApp
 {
-    public class FileSystemItem
+    public class FileSystemItem : INotifyPropertyChanged
     {
         public string Name { get; set; }
         public string FullName { get; set; }
         public bool IsDirectory { get; set; }
         public string Icon => IsDirectory ? "folder.png" : "file.png";
+
+        private bool _isSelected;
+        public bool IsSelected
+        {
+            get => _isSelected;
+            set
+            {
+                _isSelected = value;
+                OnPropertyChanged();
+            }
+        }
+
+        // Событие из INotifyPropertyChanged
+        public event PropertyChangedEventHandler? PropertyChanged;
+
+        // Защищённый метод для вызова события
+        protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null)
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
     }
 }
diff --git a/MainPage.xaml b/MainPage.xaml
index 93a7e11..517dfbf 100644
--- a/MainPage.xaml
+++ b/MainPage.xaml
@@ -4,43 +4,46 @@
              x:Class="CommanderApp.MainPage"
              Title="MAUI Commander">
 
-    <Grid RowDefinitions="Auto, *, Auto" ColumnDefinitions="*, *">
-        <!-- Заголовки панелей -->
+    <!-- Изменяем RowDefinitions: добавляем строку под заголовком -->
+    <Grid RowDefinitions="Auto, Auto, *, Auto" ColumnDefinitions="*, *">
+        <!-- Новая строка: пути над панелями (где были красные линии) -->
         <Label Text="{Binding LeftPath}" 
-               Grid.Row="0" Grid.Column="0"
-               Padding="10" FontAttributes="Bold" BackgroundColor="#f0f0f0"/>
+               Grid.Row="1" Grid.Column="0"
+               Padding="12,6"
+               FontSize="14"
+               FontAttributes="Bold"
+               BackgroundColor="#f0f0f0"
+               TextColor="Black"
+               VerticalTextAlignment="Center"
+               LineBreakMode="MiddleTruncation" />
+
         <Label Text="{Binding RightPath}" 
-               Grid.Row="0" Grid.Column="1"
-               Padding="10" FontAttributes="Bold" BackgroundColor="#f0f0f0"/>
+               Grid.Row="1" Grid.Column="1"
+               Padding="12,6"
+               FontSize="14"
+               FontAttributes="Bold"
+               BackgroundColor="#f0f0f0"
+               TextColor="Black"
+               VerticalTextAlignment="Center"
+               LineBreakMode="MiddleTruncation" />
 
         <!-- Левая панель -->
         <CollectionView x:Name="LeftPanel"
-                Grid.Row="1" Grid.Column="0"
+                Grid.Row="2" Grid.Column="0"
                 ItemsSource="{Binding LeftItems}"
-                SelectionMode="Single"
-                SelectionChanged="OnLeftSelectionChanged">
+                SelectionMode="None">
             <CollectionView.ItemTemplate>
                 <DataTemplate>
-                    <Grid Padding="10" Background="Transparent">
-                        <VisualStateManager.VisualStateGroups>
-                            <VisualStateGroup Name="CommonStates">
-                                <VisualState Name="Selected">
-                                    <VisualState.Setters>
-                                        <Setter Property="BackgroundColor" Value="#d0e0ff" />
-                                    </VisualState.Setters>
-                                </VisualState>
-                                <VisualState Name="Normal">
-                                    <VisualState.Setters>
-                                        <Setter Property="BackgroundColor" Value="Transparent" />
-                                    </VisualState.Setters>
-                                </VisualState>
-                            </VisualStateGroup>
-                        </VisualStateManager.VisualStateGroups>
-
+                    <Grid Padding="10" BackgroundColor="Transparent">
                         <HorizontalStackLayout Spacing="10">
                             <Image Source="{Binding Icon}" WidthRequest="20" HeightRequest="20" />
                             <Label Text="{Binding Name}" VerticalOptions="Center" />
                         </HorizontalStackLayout>
+
+                        <Grid.GestureRecognizers>
+                            <TapGestureRecognizer NumberOfTapsRequired="1" Tapped="OnLeftItemTapped" />
+                            <TapGestureRecognizer NumberOfTapsRequired="2" Tapped="OnLeftItemDoubleTapped" />
+                        </Grid.GestureRecognizers>
                     </Grid>
                 </DataTemplate>
             </CollectionView.ItemTemplate>
@@ -48,39 +51,28 @@
 
         <!-- Правая панель -->
         <CollectionView x:Name="RightPanel"
-                Grid.Row="1" Grid.Column="1"
+                Grid.Row="2" Grid.Column="1"
                 ItemsSource="{Binding RightItems}"
-                SelectionMode="Single"
-                SelectionChanged="OnRightSelectionChanged">
+                SelectionMode="None">
             <CollectionView.ItemTemplate>
                 <DataTemplate>
-                    <Grid Padding="10" Background="Transparent">
-                        <VisualStateManager.VisualStateGroups>
-                            <VisualStateGroup Name="CommonStates">
-                                <VisualState Name="Selected">
-                                    <VisualState.Setters>
-                                        <Setter Property="BackgroundColor" Value="#d0e0ff" />
-                                    </VisualState.Setters>
-                                </VisualState>
-                                <VisualState Name="Normal">
-                                    <VisualState.Setters>
-                                        <Setter Property="BackgroundColor" Value="Transparent" />
-                                    </VisualState.Setters>
-                                </VisualState>
-                            </VisualStateGroup>
-                        </VisualStateManager.VisualStateGroups>
-
+                    <Grid Padding="10" BackgroundColor="Transparent">
                         <HorizontalStackLayout Spacing="10">
                             <Image Source="{Binding Icon}" WidthRequest="20" HeightRequest="20" />
                             <Label Text="{Binding Name}" VerticalOptions="Center" />
                         </HorizontalStackLayout>
+
+                        <Grid.GestureRecognizers>
+                            <TapGestureRecognizer NumberOfTapsRequired="1" Tapped="OnRightItemTapped" />
+                            <TapGestureRecognizer NumberOfTapsRequired="2" Tapped="OnRightItemDoubleTapped" />
+                        </Grid.GestureRecognizers>
                     </Grid>
                 </DataTemplate>
             </CollectionView.ItemTemplate>
         </CollectionView>
 
         <!-- Адаптивный Toolbar (Footer) -->
-        <FlexLayout Grid.Row="2"
+        <FlexLayout Grid.Row="3"
             Grid.ColumnSpan="2"
             Padding="10"
             BackgroundColor="#e0e0e0"
@@ -89,8 +81,7 @@
             JustifyContent="Center"
             AlignItems="Center">
 
-            <Button Text="F5 Copy"   Clicked="OnCopyClicked"   Padding="12,6" MinimumWidthRequest="80" Margin="0,0,8
-                    ,8" />
+            <Button Text="F5 Copy"   Clicked="OnCopyClicked"   Padding="12,6" MinimumWidthRequest="80" Margin="0,0,8,8" />
             <Button Text="F6 Move"   Clicked="OnMoveClicked"   Padding="12,6" MinimumWidthRequest="80" Margin="0,0,8,8" />
             <Button Text="F7 Mkdir"  Clicked="OnMkdirClicked"  Padding="12,6" MinimumWidthRequest="80" Margin="0,0,8,8" />
             <Button Text="F8 Delete" Clicked="OnDeleteClicked" Padding="12,6" MinimumWidthRequest="80" Margin="0,0,8,8" />
diff --git a/MainPage.xaml.cs b/MainPage.xaml.cs
index 701bf12..f1f6d0c 100644
--- a/MainPage.xaml.cs
+++ b/MainPage.xaml.cs
@@ -1,19 +1,52 @@
 // MainPage.xaml.cs
 using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
 using Microsoft.Maui.Controls;
 
 namespace CommanderApp;
 
-public partial class MainPage : ContentPage
+public partial class MainPage : ContentPage, INotifyPropertyChanged
 {
     private readonly IFileSystemService _fileService;
+
     public ObservableCollection<FileSystemItem> LeftItems { get; set; } = new();
     public ObservableCollection<FileSystemItem> RightItems { get; set; } = new();
-    public string LeftPath { get; set; } = string.Empty;
-    public string RightPath { get; set; } = string.Empty;
 
-    private string _currentLeftPath;
-    private string _currentRightPath;
+    // --- Изменено: приватные поля + INotifyPropertyChanged ---
+    private string _leftPath = string.Empty;
+    private string _rightPath = string.Empty;
+
+    private Grid? _currentSelectedGrid; // только один выделенный элемент в интерфейсе
+
+    public string LeftPath
+    {
+        get => _leftPath;
+        set
+        {
+            if (_leftPath != value)
+            {
+                _leftPath = value;
+                NotifyPropertyChanged();
+            }
+        }
+    }
+
+    public string RightPath
+    {
+        get => _rightPath;
+        set
+        {
+            if (_rightPath != value)
+            {
+                _rightPath = value;
+                NotifyPropertyChanged();
+            }
+        }
+    }
+
+    private string _currentLeftPath = string.Empty;
+    private string _currentRightPath = string.Empty;
 
     private FileSystemItem? _selectedLeftItem;
     private FileSystemItem? _selectedRightItem;
@@ -38,14 +71,14 @@ public partial class MainPage : ContentPage
             LeftItems.Clear();
             foreach (var item in items) LeftItems.Add(item);
             _currentLeftPath = path;
-            LeftPath = path;
+            LeftPath = path; // Теперь это вызовет обновление UI
         }
         else
         {
             RightItems.Clear();
             foreach (var item in items) RightItems.Add(item);
             _currentRightPath = path;
-            RightPath = path;
+            RightPath = path; // И это тоже
         }
     }
 
@@ -191,4 +224,86 @@ public partial class MainPage : ContentPage
             await DisplayAlert("Error", $"{actionName} failed: {ex.Message}", "OK");
         }
     }
+
+    private void OnLeftItemTapped(object sender, TappedEventArgs e)
+    {
+        var grid = (Grid)sender;
+        var item = (FileSystemItem)grid.BindingContext;
+
+        // Сбрасываем выделение у предыдущего элемента (где бы он ни был)
+        if (_currentSelectedGrid != null)
+        {
+            _currentSelectedGrid.BackgroundColor = Colors.Transparent;
+        }
+
+        // Выделяем новый элемент
+        grid.BackgroundColor = Color.FromArgb("#d0e0ff");
+        _currentSelectedGrid = grid;
+
+        // Обновляем активный выбор
+        _selectedLeftItem = item;
+        _selectedRightItem = null; // сбрасываем выбор в правой панели
+    }
+
+    private void OnLeftItemDoubleTapped(object sender, TappedEventArgs e)
+    {
+        var grid = (Grid)sender;
+        var item = (FileSystemItem)grid.BindingContext;
+
+        if (item.IsDirectory)
+        {
+            LoadDirectory(item.FullName, isLeft: true);
+            // Сбрасываем выделение, так как панель обновляется
+            if (_currentSelectedGrid != null)
+            {
+                _currentSelectedGrid.BackgroundColor = Colors.Transparent;
+                _currentSelectedGrid = null;
+            }
+            _selectedLeftItem = null;
+            _selectedRightItem = null;
+        }
+    }
+
+    private void OnRightItemTapped(object sender, TappedEventArgs e)
+    {
+        var grid = (Grid)sender;
+        var item = (FileSystemItem)grid.BindingContext;
+
+        if (_currentSelectedGrid != null)
+        {
+            _currentSelectedGrid.BackgroundColor = Colors.Transparent;
+        }
+
+        grid.BackgroundColor = Color.FromArgb("#d0e0ff");
+        _currentSelectedGrid = grid;
+
+        _selectedRightItem = item;
+        _selectedLeftItem = null; // сбрасываем выбор в левой панели
+    }
+
+    private void OnRightItemDoubleTapped(object sender, TappedEventArgs e)
+    {
+        var grid = (Grid)sender;
+        var item = (FileSystemItem)grid.BindingContext;
+
+        if (item.IsDirectory)
+        {
+            LoadDirectory(item.FullName, isLeft: false);
+            if (_currentSelectedGrid != null)
+            {
+                _currentSelectedGrid.BackgroundColor = Colors.Transparent;
+                _currentSelectedGrid = null;
+            }
+            _selectedLeftItem = null;
+            _selectedRightItem = null;
+        }
+    }
+
+    // --- Реализация INotifyPropertyChanged ---
+    public new event PropertyChangedEventHandler? PropertyChanged;
+
+    protected virtual void NotifyPropertyChanged([CallerMemberName] string? propertyName = null)
+    {
+        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+    }
 }
\ No newline at end of file