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

namespace UIShare.Converters
{
    public class StringToVisibilityConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            // 是否反转结果（字符串非空时返回 Collapsed），用于需要“有值则隐藏”的场景，如展开全屏时隐藏台架标签页
            bool inverse = string.Equals(parameter?.ToString(), "Inverse", StringComparison.OrdinalIgnoreCase);
            if(value is string str)
            {
                if (string.IsNullOrEmpty(str))
                {
                    return inverse ? Visibility.Visible : Visibility.Collapsed;
                }
                else
                {
                    return inverse ? Visibility.Collapsed : Visibility.Visible;
                }
            }
            return inverse ? Visibility.Visible : Visibility.Collapsed;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}