commander/PanelCollectionView.cs

using Microsoft.Maui.Controls;

namespace CommanderApp;

public static class PanelCollectionView
{
    public static DataTemplate CreateItemTemplate(bool isLeftPanel, MainPage page)
    {
        return new DataTemplate(() =>
        {
            var button = new Button
            {
                Padding = new Thickness(15, 8, 5, 8), // left, top, right, bottom
                HeightRequest = 40,
                BackgroundColor = Colors.Transparent,
                BorderWidth = 0,
                TextColor = Colors.Black,
                HorizontalOptions = LayoutOptions.Fill,
            };

            button.SetBinding(Button.TextProperty, new Binding("DisplayText"));
            button.SetBinding(Button.CommandParameterProperty, new Binding("."));

            // Обработчик нажатия
            button.Clicked += (s, e) =>
            {
                if (s is Button btn && btn.CommandParameter is FileSystemItem item)
                {
                    page.HandleItemClick(item, isLeftPanel);
                }
            };

            // Визуальные состояния для фокуса
            var visualStateGroups = new VisualStateGroupList();
            var commonStates = new VisualStateGroup { Name = "CommonStates" };

            var normalState = new VisualState { Name = "Normal" };
            normalState.Setters.Add(new Setter { Property = Button.TextColorProperty, Value = Colors.Black });

            var focusedState = new VisualState { Name = "Focused" };
            focusedState.Setters.Add(new Setter { Property = Button.BorderColorProperty, Value = Colors.Blue });
            focusedState.Setters.Add(new Setter { Property = Button.BorderWidthProperty, Value = 2 });

            var pressedState = new VisualState { Name = "Pressed" };
            pressedState.Setters.Add(new Setter { Property = Button.TextColorProperty, Value = Colors.Black });
            pressedState.Setters.Add(new Setter { Property = Button.BackgroundColorProperty, Value = Color.FromArgb("#e0e0e0") });

            commonStates.States.Add(normalState);
            commonStates.States.Add(focusedState);
            //commonStates.States.Add(pressedState);
            visualStateGroups.Add(commonStates);

            VisualStateManager.SetVisualStateGroups(button, visualStateGroups);

            return button;
        });
    }

}