Added Shown and Hidden events to DynamicListRow.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@900 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Main/Base/Project/Src/Gui/TreeGrid/DynamicList.cs

@@ -89,12 +89,30 @@ namespace ICSharpCode.SharpDevelop.Gui.TreeGrid
 		{
 			e.Item.HeightChanged += RowHeightChanged;
 			e.Item.ItemChanged   += RowItemChanged;
+			if (Visible && Parent != null)
+				e.Item.NotifyListVisibilityChange(this, true);
 		}
 		
 		void OnRowRemoved(object sender, CollectionItemEventArgs<DynamicListRow> e)
 		{
 			e.Item.HeightChanged -= RowHeightChanged;
 			e.Item.ItemChanged   -= RowItemChanged;
+			if (Visible)
+				e.Item.NotifyListVisibilityChange(this, false);
+		}
+		
+		bool oldVisible = false;
+		
+		protected override void OnVisibleChanged(EventArgs e)
+		{
+			base.OnVisibleChanged(e);
+			bool visible = Visible && Parent != null;
+			if (visible == oldVisible)
+				return;
+			oldVisible = visible;
+			foreach (DynamicListRow row in Rows) {
+				row.NotifyListVisibilityChange(this, visible);
+			}
 		}
 		
 		void ColumnMinimumWidthChanged(object sender, EventArgs e)

src/Main/Base/Project/Src/Gui/TreeGrid/DynamicListRow.cs

@@ -38,6 +38,31 @@ namespace ICSharpCode.SharpDevelop.Gui.TreeGrid
 			}
 		}
 		
+		public event EventHandler<DynamicListEventArgs> Shown;
+		public event EventHandler<DynamicListEventArgs> Hidden;
+		
+		protected virtual void OnShown(DynamicListEventArgs e)
+		{
+			if (Shown != null) {
+				Shown(this, e);
+			}
+		}
+		
+		protected virtual void OnHidden(DynamicListEventArgs e)
+		{
+			if (Hidden != null) {
+				Hidden(this, e);
+			}
+		}
+		
+		internal void NotifyListVisibilityChange(DynamicList list, bool visible)
+		{
+			if (visible)
+				OnShown(new DynamicListEventArgs(list));
+			else
+				OnHidden(new DynamicListEventArgs(list));
+		}
+		
 		/// <summary>
 		/// Fired when any item has changed.
 		/// </summary>