Merge pull request #267 from corytodd/OptionalShowOnHover

Optional show hidden LayoutAnchorable on hover

source/Components/AvalonDock/Controls/LayoutAnchorControl.cs

@@ -138,7 +138,8 @@ protected override void OnMouseEnter(System.Windows.Input.MouseEventArgs e)
 		{
 			base.OnMouseEnter(e);
 
-			if (!e.Handled)
+			// If the model wants to auto-show itself on hover then initiate the show action
+			if (!e.Handled && _model.CanShowOnHover)
 			{
 				_openUpTimer = new DispatcherTimer(DispatcherPriority.ApplicationIdle);
 				_openUpTimer.Interval = TimeSpan.FromMilliseconds(400);

source/Components/AvalonDock/Layout/LayoutContent.cs

@@ -462,6 +462,30 @@ public bool CanFloat
 
 		#endregion CanFloat
 
+		#region CanShowOnHover
+
+		private bool _canShowOnHover = true;
+
+		/// <summary>
+		/// Set to false to disable the behavior of auto-showing
+		/// a <see cref="LayoutAnchorableControl"/> on mouse over.
+		/// When true, hovering the mouse over an anchorable tab 
+		/// will cause the anchorable to show itself.
+		/// </summary>
+		/// <remarks>Defaults to true</remarks>
+		public bool CanShowOnHover
+		{
+			get => _canShowOnHover;
+			set
+			{
+				if (value == _canShowOnHover) return;
+				_canShowOnHover = value;
+				RaisePropertyChanged(nameof(CanShowOnHover));
+			}
+		}
+
+		#endregion CanShowOnHover
+
 		#region IsEnabled
 
 		private bool _isEnabled = true;
@@ -531,6 +555,8 @@ public virtual void ReadXml(System.Xml.XmlReader reader)
 				CanFloat = bool.Parse(reader.Value);
 			if (reader.MoveToAttribute(nameof(LastActivationTimeStamp)))
 				LastActivationTimeStamp = DateTime.Parse(reader.Value, CultureInfo.InvariantCulture);
+			if (reader.MoveToAttribute(nameof(CanShowOnHover)))
+				CanShowOnHover = bool.Parse(reader.Value);
 
 			reader.Read();
 		}
@@ -570,6 +596,8 @@ public virtual void WriteXml(System.Xml.XmlWriter writer)
 
 			if (LastActivationTimeStamp != null) writer.WriteAttributeString(nameof(LastActivationTimeStamp), LastActivationTimeStamp.Value.ToString(CultureInfo.InvariantCulture));
 
+			if (!CanShowOnHover) writer.WriteAttributeString(nameof(CanShowOnHover), CanShowOnHover.ToString());
+
 			if (_previousContainer is ILayoutPaneSerializable paneSerializable)
 			{
 				writer.WriteAttributeString("PreviousContainerId", paneSerializable.Id);