kmpdfkit_demo/Demo/Examples/Compdfkit.Controls/Common/Convert/BoolToVisibilityConverter.cs

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

namespace ComPDFKit.Controls.Common
{
    /// <summary>
    /// Value converter between bool and Visibility
    /// </summary>
    [ValueConversion(typeof(bool), typeof(Visibility))]
    public class BoolToVisibleConverter : IValueConverter
    {
        #region IValueConverter Members
        /// <summary>
        /// Converts a value.
        /// </summary>
        /// <param name="value">The value produced by the binding source.</param>
        /// <param name="targetType">The type of the binding target property.</param>
        /// <param name="parameter">The converter parameter to use.</param>
        /// <param name="culture">The culture to use in the converter.</param>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        public object Convert(
            object value,
            Type targetType,
            object parameter,
            CultureInfo culture)
        {

            if ((bool)value)
            {
                return Visibility.Visible;
            }
            else
            {
                return Visibility.Collapsed;
            }
        }

        /// <summary>
        /// Converts a value back.
        /// </summary>
        /// <param name="value">The value that is produced by the binding target.</param>
        /// <param name="targetType">The type to convert to.</param>
        /// <param name="parameter">The converter parameter to use.</param>
        /// <param name="culture">The culture to use in the converter.</param>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        public object ConvertBack(
            object value,
            Type targetType,
            object parameter,
            CultureInfo culture)
        {
            return (Visibility)value == Visibility.Visible;
        }
        #endregion IValueConverter Members
    }

    /// <summary>
    /// Value converter between bool and Visibility
    /// </summary>
    [ValueConversion(typeof(bool), typeof(Visibility))]
    public class BoolToCollapsedConverter : IValueConverter
    {
        #region IValueConverter Members
        /// <summary>
        /// Converts a value.
        /// </summary>
        /// <param name="value">The value produced by the binding source.</param>
        /// <param name="targetType">The type of the binding target property.</param>
        /// <param name="parameter">The converter parameter to use.</param>
        /// <param name="culture">The culture to use in the converter.</param>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        public object Convert(
            object value,
            Type targetType,
            object parameter,
            CultureInfo culture)
        {
            if ((bool)value)
            {
                return Visibility.Collapsed;

            }
            else
            {
                return Visibility.Visible;

            }
        }

        /// <summary>
        /// Converts a value back.
        /// </summary>
        /// <param name="value">The value that is produced by the binding target.</param>
        /// <param name="targetType">The type to convert to.</param>
        /// <param name="parameter">The converter parameter to use.</param>
        /// <param name="culture">The culture to use in the converter.</param>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        public object ConvertBack(
            object value,
            Type targetType,
            object parameter,
            CultureInfo culture)
        {
            return null;
        }
        #endregion IValueConverter Members
    }
}