using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls;
using System.Windows.Data;

namespace PDF_Master.DataConvert
{
    public class IsProgressedConverter : IMultiValueConverter
    {
        public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if ((values[0] is ContentControl && values[1] is int) == false)
            {
                return EnumCompare.None;
            }

            ContentControl contentControl = values[0] as ContentControl;
            int progress = (int)values[1];
            ItemsControl itemsControl = ItemsControl.ItemsControlFromItemContainer(contentControl);

            if (itemsControl == null)
            {
                return EnumCompare.None;
            }

            int index = itemsControl.ItemContainerGenerator.IndexFromContainer(contentControl);

            if (index < progress)
            {
                return EnumCompare.Less;
            }
            else if (index == progress)
            {
                return EnumCompare.Equal;
            }
            return EnumCompare.Large;
        }

        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotSupportedException();
        }
    }

    public enum EnumCompare
    {
        /// <summary>
        /// 小于
        /// </summary>
        Less,

        /// <summary>
        /// 等于
        /// </summary>
        Equal,

        /// <summary>
        /// 大于
        /// </summary>
        Large,

        None,
    }
}