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6502bench/CommonWPF/InverseBooleanConverter.cs
Andy McFadden 499d3478ba Add multi-key combo handling for hints
Doesn't work 100% correctly -- in some cases, using two different
combos in quick succession will fail -- but it's close.

Added stub methods for the four hint operations.
2019-06-04 16:10:55 -07:00

41 lines
1.5 KiB
C#

/*
* Copyright 2019 faddenSoft
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System;
using System.Windows.Data;
namespace CommonWPF {
/// <summary>
/// A value inverter for negating a boolean value (value --> !value).
///
/// See https://stackoverflow.com/questions/1039636/how-to-bind-inverse-boolean-properties-in-wpf
/// </summary>
[ValueConversion(typeof(bool), typeof(bool))]
public class InverseBooleanConverter : IValueConverter {
public object Convert(object value, Type targetType, object parameter,
System.Globalization.CultureInfo culture) {
if (targetType != typeof(bool))
throw new InvalidOperationException("The target must be a boolean");
return !(bool)value;
}
public object ConvertBack(object value, Type targetType, object parameter,
System.Globalization.CultureInfo culture) {
throw new NotSupportedException();
}
}
}