PROMS/Volian.Controls.Library/DisplayTransition.cs

@@ -15,7 +15,6 @@ namespace Volian.Controls.Library
 	public partial class DisplayTransition : UserControl
 	{
 		#region Properties
-
 		private int _TranFmtIndx = -1;		// stores selected transition format
 		private ItemInfo _CurItemFrom;		// stores what item transition is 'from'
 		private TransitionInfo _CurTrans;	// if modify, this is transition to modify
@@ -23,19 +22,22 @@ namespace Volian.Controls.Library
 		{
 			get { return _CurTrans; }
 			set 
-			{ 
-				_CurTrans = value;
-				if (_CurTrans == null)	// Insert a transition
+			{
+				if (!Visible) return;
+				if (value == null)			// Insert a transition
 				{
 					if (MyRTB == null) return;
+					if (_CurTrans == value && _CurItemFrom == MyRTB.MyItem) return;
 					_CurItemFrom = MyRTB.MyItem;
 					_TranFmtIndx = 0;
 				}
-				else					// Modify a transition
+				else						// Modify a transition
 				{
-					_TranFmtIndx = _CurTrans.TranType;
+					if (_CurTrans == value) return;
+					_TranFmtIndx = value.TranType;
 					_CurItemFrom = MyRTB.MyItem;
 				}
+				_CurTrans = value;
 				_SavCurItemFrom = _CurItemFrom;
 				_SavTranFmtIndx = _TranFmtIndx;
 				TransitionFillIn();
@@ -60,7 +62,30 @@ namespace Volian.Controls.Library
 		public DisplayRTB MyRTB
 		{
 			get { return _MyRTB; }
-			set { _MyRTB = value; }
+			set 
+			{
+				if (!Visible) return;
+				// add or remove events for 
+				if (_MyRTB != null)		
+					_MyRTB.LinkChanged -= new DisplayRTBLinkEvent(_MyRTB_LinkChanged);
+				if (value == null) return;
+				_MyRTB = value;
+				_MyRTB.LinkChanged += new DisplayRTBLinkEvent(_MyRTB_LinkChanged);
+				if (_MyRTB.MyLinkText == null)
+				{
+					CurTrans = null;
+				}
+			}
+		}
+		void _MyRTB_LinkChanged(object sender, LinkClickedEventArgs e)
+		{
+			if (_MyRTB.MyLinkText == null)
+				CurTrans = null;
+			else
+			{
+				DisplayLinkEventArgs tmp = new DisplayLinkEventArgs(null, e);
+				CurTrans = tmp.MyTransition;
+			}
 		}
 		private ItemInfo _CurrentItemProcedure;		// the selected item's procedure
 		private ItemInfo _CurrentToProcedure;		// the 'to' location's procedure (may be same as _CurrentItemProcedure)