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using System;
using System.Globalization;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
namespace MaterialDesignThemes.Wpf.Converters
{
/// <summary>
/// Helps coerce the correct item container style for a <see cref="ListView"/>, according to whether the list is displaying in standard mode, or using a <see cref="ListView.View"/>, such as a <see cref="GridView"/>.
/// </summary>
public class ListViewGridViewConverter : IValueConverter
{
/// <summary>
/// Item container style to use when <see cref="ListView.View"/> is <c>null</c>.
/// </summary>
public object DefaultValue { get; set; }
/// <summary>
/// Item container style to use when <see cref="ListView.View"/> is not <c>null</c>, typically when a <see cref="GridView"/> is applied.
/// </summary>
public object ViewValue { get; set; }
/// <summary>
/// Returns the item container <see cref="Style"/> to use for a <see cref="ListView"/>.
/// </summary>
/// <param name="value">Should be a <see cref="ListView"/> or <see cref="ViewBase"/> instance.</param>
/// <param name="targetType"></param>
/// <param name="parameter"></param>
/// <param name="culture"></param>
/// <returns></returns>
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var listView = value as ListView;
if (listView != null)
{
return listView.View != null ? ViewValue : DefaultValue;
}
return value is ViewBase ? ViewValue : DefaultValue;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
return Binding.DoNothing;
}
}
}
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