* UINavMenu: 尝试减少刷新闪烁

SunnyUI/Controls/UINavMenu.cs

@@ -97,6 +97,15 @@ namespace Sunny.UI
 
             selectedForeColor = UIStyles.Blue.NavMenuMenuSelectedColor;
             selectedHighColor = UIStyles.Blue.NavMenuMenuSelectedColor;
+
+            _timer = new System.Windows.Forms.Timer();
+            _timer.Tick += Timer_Tick;
+        }
+
+        protected override void Dispose(bool disposing)
+        {
+            _timer.Dispose();
+            base.Dispose(disposing);
         }
 
         private int scrollBarWidth = 0;
@@ -637,6 +646,13 @@ namespace Sunny.UI
         }
 
         protected override void OnDrawNode(DrawTreeNodeEventArgs e)
+        {
+            if (_resizing)
+            {
+                return;
+                //e.DrawDefault = true;
+            }
+            else
             {
                 if (BorderStyle != BorderStyle.None)
                 {
@@ -779,6 +795,7 @@ namespace Sunny.UI
 
                 base.OnDrawNode(e);
             }
+        }
 
         private Color tipsColor = Color.Red;
 
@@ -1220,5 +1237,38 @@ namespace Sunny.UI
         public delegate void OnNodeRightSymbolClick(object sender, TreeNode node, int index, int symbol);
 
         public event OnNodeRightSymbolClick NodeRightSymbolClick;
+
+        protected override void OnResize(EventArgs e)
+        {
+            //_resizing = true;
+            //_previousClientSize = ClientSize;
+            // 启动计时器
+            //_timer.Start();
+        }
+
+        private bool _resizing;
+        private System.Windows.Forms.Timer _timer;
+        private Size _previousClientSize;
+
+        private void Timer_Tick(object sender, EventArgs e)
+        {
+            // 检查控件的大小是否与前一次检查时相同
+            if (ClientSize == _previousClientSize)
+            {
+                // 控件已停止调整大小
+                _resizing = false;
+
+                // 清除计时器
+                _timer.Stop();
+
+                // 刷新 TreeView
+                Invalidate();
+            }
+            else
+            {
+                // 更新前一次检查时的大小
+                _previousClientSize = ClientSize;
+            }
+        }
     }
 }