mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/Base/Core/Internal/PropertyEditing/FromExpression/Framework/Data/BoolToVisibilityHiddenConverter.cs

   1 // -------------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation. All Rights Reserved.
   3 // -------------------------------------------------------------------
   4 //From \\authoring\Sparkle\Source\1.0.1083.0\Common\Source\Framework\Data
   5 namespace System.Activities.Presentation.Internal.PropertyEditing.FromExpression.Framework.Data
   6 {
   7     using System;
   8     using System.ComponentModel;
   9     using System.Globalization;
  10     using System.Reflection;
  11     using System.Windows;
  12     using System.Windows.Controls;
  13     using System.Windows.Data;
  14     using System.Diagnostics.CodeAnalysis;
  15
  16     // <summary>
  17     // (bool-to-Visibility) Maps true to Visible and false to Hidden.
  18     // </summary>
  19
  20     [SuppressMessage("Microsoft.Performance", "CA1812:AvoidUninstantiatedInternalClasses")]
  21     internal class BoolToVisibilityHiddenConverter : IValueConverter
  22     {
  23         bool invertBoolean = false;
  24
  25         [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
  26
  27         public bool InvertBoolean
  28         {
  29             get { return this.invertBoolean; }
  30             set { this.invertBoolean = value; }
  31         }
  32
  33         // IValueConverter Implementation
  34         public object ConvertBack(object o, Type targetType, object parameter, CultureInfo culture)
  35         {
  36             Visibility visibility = (Visibility)o;
  37             bool result = visibility == Visibility.Visible;
  38             if (this.invertBoolean)
  39             {
  40                 result = !result;
  41             }
  42             return result;
  43         }
  44
  45         public object Convert(object o, Type targetType, object parameter, CultureInfo culture)
  46         {
  47             bool show = (bool)o;
  48             if (this.invertBoolean)
  49             {
  50                 show = !show;
  51             }
  52             return show ? Visibility.Visible : Visibility.Hidden;
  53         }
  54     }
  55
  56 }