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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.ComponentModel;
using System.Windows;
using System.Windows.Media;
using System.Windows.Data;
using System.Globalization;
using System.Collections.Generic;
using MS.Internal.Controls;
namespace System.Windows.Controls
{
/// <summary>
/// Convert between boolean and visibility
/// </summary>
[Localizability(LocalizationCategory.NeverLocalize)]
public sealed class BooleanToVisibilityConverter : IValueConverter
{
/// <summary>
/// Convert bool or Nullable<bool> to Visibility
/// </summary>
/// <param name="value">bool or Nullable<bool></param>
/// <param name="targetType">Visibility</param>
/// <param name="parameter">null</param>
/// <param name="culture">null</param>
/// <returns>Visible or Collapsed</returns>
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
bool bValue = false;
if (value is bool)
{
bValue = (bool)value;
}
else if (value is Nullable<bool>)
{
Nullable<bool> tmp = (Nullable<bool>)value;
bValue = tmp.HasValue ? tmp.Value : false;
}
return (bValue) ? Visibility.Visible : Visibility.Collapsed;
}
/// <summary>
/// Convert Visibility to boolean
/// </summary>
/// <param name="value"></param>
/// <param name="targetType"></param>
/// <param name="parameter"></param>
/// <param name="culture"></param>
/// <returns></returns>
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value is Visibility)
{
return (Visibility)value == Visibility.Visible;
}
else
{
return false;
}
}
}
}
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