* OnAfterSelect增加判断，解决引发事件所有结点重绘导致闪烁；设置FullRowSelect ShowLines 属性，解决滚轮失效问题。

SunnyUI/Controls/UINavMenu.cs

@@ -43,8 +43,8 @@ namespace Sunny.UI
             BorderStyle = BorderStyle.None;
             //HideSelection = false;
             DrawMode = TreeViewDrawMode.OwnerDrawAll;
-            //FullRowSelect = true;
-            //ShowLines = false;
+            FullRowSelect = true;
+            ShowLines = false;
             //ShowPlusMinus = false;
             //ShowRootLines = false;
 
@@ -609,15 +609,21 @@ namespace Sunny.UI
             {
                 TreeNode node = e.Node.PrevNode;
                 while (node != null)
+                {
+                    if (node.IsExpanded)
                     {
                         node.Collapse();
+                    }
                     node = node.PrevNode;
                 }
 
                 node = e.Node.NextNode;
                 while (node != null)
+                {
+                    if (node.IsExpanded)
                     {
                         node.Collapse();
+                    }
                     node = node.NextNode;
                 }
             }