//
// ExListView.cs
//
// Author:
//       Eric Maupin <ermau@xamarin.com>
//
// Copyright (c) 2012 Xamarin, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

using System.Windows;
using System.Windows.Controls;
using SWC = System.Windows.Controls;
using System.Windows.Automation.Peers;
using System.Linq;

namespace Xwt.WPFBackend
{
	public class ExListView
		: SWC.ListView, IWpfWidget
	{
		public WidgetBackend Backend { get; set; }

		protected override bool IsItemItsOwnContainerOverride(object item)
		{
			return item is ExListViewItem;
		}

		protected override DependencyObject GetContainerForItemOverride()
		{
			return new ExListViewItem();
		}

		protected override System.Windows.Size MeasureOverride (System.Windows.Size constraint)
		{
			var s = base.MeasureOverride (constraint);

			if (ScrollViewer.GetHorizontalScrollBarVisibility (this) != ScrollBarVisibility.Hidden)
				s.Width = 0;
			if (ScrollViewer.GetVerticalScrollBarVisibility (this) != ScrollBarVisibility.Hidden)
				s.Height = SystemParameters.CaptionHeight;
			s = Backend.MeasureOverride (constraint, s);
			return s;
		}

		private ListViewItem focusedItem = null;
		public ListViewItem FocusedItem {
			get {
				return focusedItem;
			}
			set {
				FocusItem (value);
			}
		}

		internal void FocusItem(ListViewItem item)
		{
			if (item != null) {
				focusedItem = item;
				if (!item.IsFocused)
					item.Focus ();
			}
		}

		protected override AutomationPeer OnCreateAutomationPeer ()
		{
			var backend = this.Backend as ListViewBackend;
			var listView = backend?.Frontend as Xwt.ListView;

			if (listView != null) {
				var peer = listView.Accessible.GetChildren ()?.FirstOrDefault ();
				if (peer is AutomationPeer)
					return (AutomationPeer)peer;
			}
			return base.OnCreateAutomationPeer ();
		}
	}
}