using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;

namespace JD.Interfaces.Models
{
    /// <summary>
    /// Interface representing the data behind a tree view item. 
    /// </summary>
    public interface ITreeViewItemData
    {
        ObservableCollection<ITreeViewItemData> Children { get; }
        bool HasChildren { get; }
        bool IsExpanded { get; set; }
        bool IsSelected { get; set; }
        bool IsFiltered { get; }
        ITreeViewItemData Parent { get; }
        ITreeViewItemData Root { get; }

        IEnumerable<ITreeViewItemData> SelectedItems { get; }

        event EventHandler ExpandedChanged;
        event EventHandler SelectedChanged;

        // For use in a TreeList. 
        int Level { get; }
        IList<ITreeViewItemData> GetAllChildren();
        ITreeViewItemData GetNextItem();
        ITreeViewItemData GetPreviousItem();
        ITreeViewItemData GetFirstChild(bool onlyNotFiltered);
        bool HasItemForParent(ITreeViewItemData potentialParentItem);
    }
}