using System.Windows.Data;

namespace VPet.House.Converters;

/// <summary>
/// 边距转换器
/// <para>示例:
/// <code><![CDATA[
/// <MultiBinding Converter="{StaticResource MarginConverter}">
///   <Binding Path="StringFormat" />
///   <Binding Path="Value1" />
///   <Binding Path="Value2" />
/// </MultiBinding>
/// OR
/// <MultiBinding Converter="{StaticResource MarginConverter}" ConverterParameter="{}{0}{1}">
///   <Binding Path="Value1" />
///   <Binding Path="Value2" />
/// </MultiBinding>
/// ]]></code></para>
/// </summary>
public class StringFormatConverter : IMultiValueConverter
{
    public object Convert(
        object[] values,
        Type targetType,
        object parameter,
        System.Globalization.CultureInfo culture
    )
    {
        var formatStr = (string)parameter;
        if (string.IsNullOrWhiteSpace(formatStr))
        {
            formatStr = (string)values[0];
            return string.Format(formatStr, values.Skip(1).ToArray());
        }
        else
        {
            return string.Format(formatStr, values);
        }
    }

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