/*************************************************************************************

   Extended WPF Toolkit

   Copyright (C) 2007-2013 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license 

   For more features, controls, and fast professional support,
   pick up the Plus Edition at http://xceed.com/wpf_toolkit

   Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids

  ***********************************************************************************/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Controls;
using System.Windows;
using Xceed.Wpf.AvalonDock.Layout;

namespace Xceed.Wpf.AvalonDock.Controls
{
    public class DocumentPaneTabPanel : Panel
    {
        public DocumentPaneTabPanel()
        {
            FlowDirection = System.Windows.FlowDirection.LeftToRight;
        }

        protected override Size MeasureOverride(Size availableSize)
        {
            var visibleChildren = Children.Cast<UIElement>().Where(ch => ch.Visibility != System.Windows.Visibility.Collapsed); 

            Size desideredSize = new Size();
            foreach (FrameworkElement child in Children)
            {
                child.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
                    desideredSize.Width += child.DesiredSize.Width;

                desideredSize.Height = Math.Max(desideredSize.Height, child.DesiredSize.Height);
            }

            return new Size(Math.Min(desideredSize.Width, availableSize.Width), desideredSize.Height);
        }

        protected override Size ArrangeOverride(Size finalSize)
        {
          var visibleChildren = Children.Cast<UIElement>().Where( ch => ch.Visibility != System.Windows.Visibility.Collapsed );
          var offset = 0.0;
          var skipAllOthers = false;
          foreach( TabItem doc in visibleChildren )
          {
            var layoutContent = doc.Content as LayoutContent;
            if( skipAllOthers || offset + doc.DesiredSize.Width > finalSize.Width )
            {
              if( layoutContent.IsSelected && !doc.IsVisible )
              {
                var parentContainer = layoutContent.Parent as ILayoutContainer;
                var parentSelector = layoutContent.Parent as ILayoutContentSelector;
                var parentPane = layoutContent.Parent as ILayoutPane;
                int contentIndex = parentSelector.IndexOf( layoutContent );
                if( contentIndex > 0 &&
                    parentContainer.ChildrenCount > 1 )
                {
                  parentPane.MoveChild( contentIndex, 0 );
                  parentSelector.SelectedContentIndex = 0;
                  return ArrangeOverride( finalSize );
                }
              }
              doc.Visibility = System.Windows.Visibility.Hidden;
              skipAllOthers = true;
            }
            else
            {
              doc.Visibility = System.Windows.Visibility.Visible;
              doc.Arrange( new Rect( offset, 0.0, doc.DesiredSize.Width, finalSize.Height ) );
              offset += doc.ActualWidth + doc.Margin.Left + doc.Margin.Right;
            }
          }
          return finalSize;

        }


        protected override void OnMouseLeave(System.Windows.Input.MouseEventArgs e)
        {
            //if (e.LeftButton == System.Windows.Input.MouseButtonState.Pressed &&
            //    LayoutDocumentTabItem.IsDraggingItem())
            //{
            //    var contentModel = LayoutDocumentTabItem.GetDraggingItem().Model;
            //    var manager = contentModel.Root.Manager;
            //    LayoutDocumentTabItem.ResetDraggingItem();
          //    System.Diagnostics.Trace.WriteLine("OnMouseLeave()");


            //    manager.StartDraggingFloatingWindowForContent(contentModel);
            //}

            base.OnMouseLeave(e);
        }
    }
}
