DYN-8789: hide DynamoToolTip when parent window is not visible (#16269)

Author: chubakueno

src/DynamoCoreWpf/Controls/DynamoTextBox.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
@@ -344,6 +344,38 @@ public Side AttachmentSide
             get { return ((Side)GetValue(AttachmentSideProperty)); }
             set { SetValue(AttachmentSideProperty, value); }
         }
+
+        private UIElement _target;
+
+        protected override void OnOpened(RoutedEventArgs e)
+        {
+            base.OnOpened(e);
+
+            _target = PlacementTarget;
+            if (_target != null)
+            {
+                _target.IsVisibleChanged += Target_IsVisibleChanged;
+            }
+        }
+
+        protected override void OnClosed(RoutedEventArgs e)
+        {
+            base.OnClosed(e);
+
+            if (_target != null)
+            {
+                _target.IsVisibleChanged -= Target_IsVisibleChanged;
+                _target = null;
+            }
+        }
+
+        private void Target_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
+        {
+            if (_target != null && !_target.IsVisible)
+            {
+                IsOpen = false;
+            }
+        }
     }
 
     public class LibraryToolTipPopup : Popup

src/DynamoCoreWpf/PublicAPI.Unshipped.txt

@@ -4309,6 +4309,8 @@ override Dynamo.UI.Controls.CodeBlockEditor.OnCommitChange() -> void
 override Dynamo.UI.Controls.CodeBlockEditor.OnEscape() -> void
 override Dynamo.UI.Controls.CodeBlockEditor.OnTextAreaGotFocus(object sender, System.Windows.RoutedEventArgs e) -> void
 override Dynamo.UI.Controls.CodeCompletionEditor.OnPreviewKeyDown(System.Windows.Input.KeyEventArgs e) -> void
+override Dynamo.UI.Controls.DynamoToolTip.OnClosed(System.Windows.RoutedEventArgs e) -> void
+override Dynamo.UI.Controls.DynamoToolTip.OnOpened(System.Windows.RoutedEventArgs e) -> void
 override Dynamo.UI.Controls.ImageButton.OnApplyTemplate() -> void
 override Dynamo.UI.Controls.ImageCheckBox.OnApplyTemplate() -> void
 override Dynamo.UI.Controls.ImageRepeatButton.OnApplyTemplate() -> void
@@ -5925,4 +5927,4 @@ virtual Dynamo.Wpf.ViewModels.Watch3D.DefaultWatch3DViewModel.UpdateHelpers() ->
 virtual Dynamo.Wpf.ViewModels.Watch3D.DefaultWatch3DViewModel.ZoomToFit(object parameter) -> void
 virtual Dynamo.Wpf.ViewModels.Watch3D.HelixWatch3DViewModel.OnWatchExecution() -> void
 virtual Dynamo.Wpf.ViewModels.Watch3D.HelixWatch3DViewModel.UpdateUpstream() -> void
-virtual UI.Prompts.PortPropertiesEditPrompt.OnPropertyChanged(System.ComponentModel.PropertyChangedEventArgs e) -> void
+virtual UI.Prompts.PortPropertiesEditPrompt.OnPropertyChanged(System.ComponentModel.PropertyChangedEventArgs e) -> void