commander/IPanelManager.cs

using System.Collections.ObjectModel;

namespace CommanderApp.Services;

public interface IPanelManager
{
    event EventHandler<PanelStateChangedEventArgs> StateChanged;
    
    bool IsLeftPanelActive { get; }
    FileSystemItem SelectedItem { get; }
    string ActivePanelPath { get; }
    string LeftPanelPath { get; }
    string RightPanelPath { get; }
    int LeftSelectedIndex { get; }
    int RightSelectedIndex { get; }
    
    void SwitchToLeftPanel();
    void SwitchToRightPanel();
    void MoveSelection(int direction);
    void SetSelection(int index, bool isLeftPanel);
    void UpdatePanelPaths(string leftPath, string rightPath);
    void ClearSelection();
    
    // Для привязки данных
    ObservableCollection<FileSystemItem> LeftItems { get; }
    ObservableCollection<FileSystemItem> RightItems { get; }
}

public class PanelStateChangedEventArgs : EventArgs
{
    public bool IsLeftPanelActive { get; set; }
    public int LeftSelectedIndex { get; set; }
    public int RightSelectedIndex { get; set; }
    public FileSystemItem SelectedItem { get; set; }
}