Add Accessible.PropertyChanged event

to allow custom widgets to customize accessibility behaviour

1 files changed, 23 insertions, 0 deletions

diff --git a/Xwt/Xwt.Accessibility/Accessible.cs b/Xwt/Xwt.Accessibility/Accessible.cs
index 4456d8e6..b9626a40 100644
--- a/Xwt/Xwt.Accessibility/Accessible.cs
+++ b/Xwt/Xwt.Accessibility/Accessible.cs
@@ -25,7 +25,9 @@
 // THE SOFTWARE.
 using System;
 using System.Collections.Generic;
+using System.ComponentModel;
 using System.Linq;
+using System.Runtime.CompilerServices;
 using Xwt.Backends;
 
 namespace Xwt.Accessibility
@@ -130,6 +132,7 @@ namespace Xwt.Accessibility
 			}
 			set {
 				Backend.IsAccessible = value;
+				OnPropertyChanged();
 			}
 		}
 
@@ -139,6 +142,7 @@ namespace Xwt.Accessibility
 			}
 			set {
 				Backend.Identifier = value;
+				OnPropertyChanged();
 			}
 		}
 
@@ -148,6 +152,7 @@ namespace Xwt.Accessibility
 			}
 			set {
 				Backend.Label = value;
+				OnPropertyChanged();
 			}
 		}
 
@@ -156,6 +161,7 @@ namespace Xwt.Accessibility
 			set {
 				labelWidget = value;
 				Backend.LabelWidget = value;
+				OnPropertyChanged();
 			}
 		}
 
@@ -165,6 +171,7 @@ namespace Xwt.Accessibility
 			}
 			set {
 				Backend.Title = value;
+				OnPropertyChanged();
 			}
 		}
 
@@ -174,6 +181,7 @@ namespace Xwt.Accessibility
 			}
 			set {
 				Backend.Description = value;
+				OnPropertyChanged();
 			}
 		}
 
@@ -183,6 +191,7 @@ namespace Xwt.Accessibility
 			}
 			set {
 				Backend.Value = value;
+				OnPropertyChanged();
 			}
 		}
 
@@ -192,6 +201,7 @@ namespace Xwt.Accessibility
 			}
 			set {
 				Backend.Uri = value;
+				OnPropertyChanged();
 			}
 		}
 
@@ -201,6 +211,7 @@ namespace Xwt.Accessibility
 			}
 			set {
 				Backend.Bounds = value;
+				OnPropertyChanged();
 			}
 		}
 
@@ -210,6 +221,7 @@ namespace Xwt.Accessibility
 			}
 			set {
 				Backend.Role = value;
+				OnPropertyChanged();
 			}
 		}
 
@@ -219,6 +231,7 @@ namespace Xwt.Accessibility
 			}
 			set {
 				Backend.RoleDescription = value;
+				OnPropertyChanged ();
 			}
 		}
 
@@ -261,6 +274,16 @@ namespace Xwt.Accessibility
 			}
 		}
 
+		void OnPropertyChanged ([CallerMemberName] string propertyName = null)
+		{
+			if (propertyName != null)
+			{
+				PropertyChanged?.Invoke (this, new PropertyChangedEventArgs (propertyName));
+			}
+		}
+
+		public event PropertyChangedEventHandler PropertyChanged;
+
 		/// <param name="polite">(WPF, XamMac, GtkMac) will use AutomationLiveSetting.Polite/NSAccessibilityPriorityLevel.Medium
 		/// if true and AutomationLiveSetting.Assertive/NSAccessibilityPriorityLevel.High otherwise (default)</param>
 		public void MakeAnnouncement (string message, bool polite = false)