community/Ink Canvas/Helpers/Converters.cs

using System;
using System.Globalization;
using System.Windows;
using System.Windows.Data;
using System.Windows.Media;

namespace Ink_Canvas.Converter
{
    public class BooleanToVisibilityConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if ((bool)value)
            {
                return Visibility.Visible;
            }

            return Visibility.Collapsed;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if ((bool)value)
            {
                return Visibility.Visible;
            }

            return Visibility.Collapsed;
        }
    }
    public class VisibilityConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            Visibility visibility = (Visibility)value;
            if (visibility == Visibility.Visible)
            {
                return Visibility.Collapsed;
            }

            return Visibility.Visible;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            Visibility visibility = (Visibility)value;
            if (visibility == Visibility.Visible)
            {
                return Visibility.Collapsed;
            }

            return Visibility.Visible;
        }
    }

    public class IntNumberToString : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if ((double)value == 0)
            {
                return "无限制";
            }

            return ((double)value) + "人";
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if ((double)value == 0)
            {
                return "无限制";
            }

            return ((double)value) + "人";
        }
    }

    public class IntNumberToString2 : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if ((double)value == 0)
            {
                return "自动截图";
            }

            return ((double)value) + "条";
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if ((double)value == 0)
            {
                return "自动截图";
            }

            return ((double)value) + "条";
        }
    }

    public class IsEnabledToOpacityConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            bool isChecked = (bool)value;
            if (isChecked)
            {
                return 1d;
            }

            return 0.35;
        }
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotImplementedException(); }
    }

    public class InverseBooleanToVisibilityConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if ((bool)value)
            {
                return Visibility.Collapsed;
            }

            return Visibility.Visible;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if ((bool)value)
            {
                return Visibility.Collapsed;
            }

            return Visibility.Visible;
        }
    }

    public class RippleEffectTranslationConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is double d)
            {
                return -d / 2;
            }
            return 0.0;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return null;
        }
    }

    public class StringToGeometryConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            try
            {
                if (value is string geometryString && !string.IsNullOrEmpty(geometryString))
                {
                    return Geometry.Parse(geometryString);
                }
            }
            catch (Exception)
            {
            }
            return null;
        }

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