Merge pull request #1001 from ghost1372/addEvent/ImageSelector

Add ImageOpened Event

src/Shared/HandyControl_Shared/Controls/Input/ImageSelector.cs

@@ -12,6 +12,16 @@ namespace HandyControl.Controls
 {
     public class ImageSelector : Control
     {
+        public static readonly RoutedEvent ImageSelectedEvent =
+            EventManager.RegisterRoutedEvent("ImageSelected", RoutingStrategy.Bubble,
+                typeof(RoutedEventHandler), typeof(ImageSelector));
+
+        public event RoutedEventHandler ImageSelected
+        {
+            add => AddHandler(ImageSelectedEvent, value);
+            remove => RemoveHandler(ImageSelectedEvent, value);
+        }
+        
         public ImageSelector() => CommandBindings.Add(new CommandBinding(ControlCommands.Switch, SwitchImage));
 
         private void SwitchImage(object sender, ExecutedRoutedEventArgs e)
@@ -34,6 +44,7 @@ namespace HandyControl.Controls
                     });
                     SetValue(HasValuePropertyKey, ValueBoxes.TrueBox);
                     SetCurrentValue(ToolTipProperty, dialog.FileName);
+                    RaiseEvent(new RoutedEventArgs(ImageSelectedEvent, this));
                 }
             }
             else