// Copyright (c) The Perspex Project. All rights reserved.
// Licensed under the MIT license. See licence.md file in the project root for full license information.

using Perspex.Controls.Generators;
using Perspex.Controls.Primitives;
using Perspex.Input;

namespace Perspex.Controls
{
    /// <summary>
    /// An <see cref="ItemsControl"/> in which individual items can be selected.
    /// </summary>
    public class ListBox : SelectingItemsControl
    {
        /// <summary>
        /// Defines the <see cref="SelectionMode"/> property.
        /// </summary>
        public static readonly new PerspexProperty<SelectionMode> SelectionModeProperty = 
            SelectingItemsControl.SelectionModeProperty;

        /// <inheritdoc/>
        public new SelectionMode SelectionMode
        {
            get { return base.SelectionMode; }
            set { base.SelectionMode = value; }
        }

        /// <inheritdoc/>
        protected override IItemContainerGenerator CreateItemContainerGenerator()
        {
            return new ItemContainerGenerator<ListBoxItem>(this);
        }

        /// <inheritdoc/>
        protected override void OnGotFocus(GotFocusEventArgs e)
        {
            base.OnGotFocus(e);

            if (e.NavigationMethod == NavigationMethod.Directional)
            {
                e.Handled = UpdateSelectionFromEventSource(
                    e.Source,
                    true,
                    (e.InputModifiers & InputModifiers.Shift) != 0);
            }
        }

        /// <inheritdoc/>
        protected override void OnPointerPressed(PointerPressEventArgs e)
        {
            base.OnPointerPressed(e);

            if (e.MouseButton == MouseButton.Left || e.MouseButton == MouseButton.Right)
            {
                e.Handled = UpdateSelectionFromEventSource(
                    e.Source,
                    true,
                    (e.InputModifiers & InputModifiers.Shift) != 0,
                    (e.InputModifiers & InputModifiers.Control) != 0);
            }
        }
    }
}