From 81f1c76efd4f787c50399630e2a100110e6d7251 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Jean-Philippe=20Bruy=C3=A8re?= <jp_bruyere@hotmail.com>
Date: Thu, 15 Mar 2018 03:27:35 +0100
Subject: [PATCH] root data level

---
 src/GraphicObjects/GraphicObject.cs | 28 +++++++++++++++++++++++-----
 1 file changed, 23 insertions(+), 5 deletions(-)

diff --git a/src/GraphicObjects/GraphicObject.cs b/src/GraphicObjects/GraphicObject.cs
index 2533fb1b..f404b5f1 100644
--- a/src/GraphicObjects/GraphicObject.cs
+++ b/src/GraphicObjects/GraphicObject.cs
@@ -298,6 +298,7 @@ namespace Crow
 		bool cacheEnabled = false;
 		bool clipToClientRect = true;
 		protected object dataSource;
+		bool rootDataLevel;
 		string style;
 		object tag;
 		bool isDragged;
@@ -944,19 +945,36 @@ namespace Crow
 
 				if (dse.NewDataSource == dse.OldDataSource)
 					return;
-			
-				OnDataSourceChanged (this, dse);
-
 
-				NotifyValueChanged ("DataSource", DataSource);
+				if (value != null)
+					rootDataLevel = true;
+				
+				lock (IFace.LayoutMutex) {
+					OnDataSourceChanged (this, dse);
+					NotifyValueChanged ("DataSource", DataSource);
+				}
 			}
 			get {
-				return dataSource == null ?
+				return rootDataLevel ? dataSource : dataSource == null ?
 					LogicalParent == null ? null :
 					LogicalParent is GraphicObject ? (LogicalParent as GraphicObject).DataSource : null :
 					dataSource;
 			}
 		}
+		/// <summary>
+		/// If true, rendering of GraphicObject is clipped inside client rectangle
+		/// </summary>
+		[DesignCategory ("Data")][DefaultValue(false)]
+		public virtual bool RootDataLevel {
+			get { return rootDataLevel; }
+			set {
+				if (rootDataLevel == value)
+					return;
+				rootDataLevel = value;
+				NotifyValueChanged ("RootDataLevel", rootDataLevel);
+				this.RegisterForRedraw ();
+			}
+		}
 		protected virtual void onLogicalParentDataSourceChanged(object sender, DataSourceChangeEventArgs e){
 			if (localDataSourceIsNull)
 				OnDataSourceChanged (this, e);
-- 
2.47.3