* UIPage: 增加PageDeselecting，取消页面选择时增加判断

SunnyUI/Controls/Color/UIColorWheel.cs

@@ -43,7 +43,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Controls/Color/UILabelRotate.cs

@@ -21,7 +21,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Controls/UIContextMenuStrip.cs

@@ -51,7 +51,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Controls/UIControl.cs

@@ -63,7 +63,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Controls/UIDataGridView.cs

@@ -151,7 +151,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Controls/UIImageButton.cs

@@ -53,7 +53,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Controls/UIKnobControl.cs

@@ -1394,7 +1394,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Controls/UILabel.cs

@@ -51,7 +51,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>
@@ -201,7 +201,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Controls/UILedBulb.cs

@@ -53,7 +53,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Controls/UINavBar.cs

@@ -75,7 +75,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Controls/UINavMenu.cs

@@ -130,7 +130,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Controls/UINavMenuHelper.cs

@@ -358,6 +358,13 @@ namespace Sunny.UI
                 return false;
             }
 
+            List<UIPage> pages = tabControl.SelectedTab.GetControls<UIPage>();
+            if (pages.Count == 1)
+            {
+                bool isCancel = pages[0].OnPageDeselecting();
+                if (isCancel) return false;
+            }
+
             foreach (var item in PageItems)
             {
                 if (item.Value.PageIndex == pageIndex && item.Key != null)
@@ -380,6 +387,13 @@ namespace Sunny.UI
                 return false;
             }
 
+            List<UIPage> pages = tabControl.SelectedTab.GetControls<UIPage>();
+            if (pages.Count == 1)
+            {
+                bool isCancel = pages[0].OnPageDeselecting();
+                if (isCancel) return false;
+            }
+
             foreach (var item in PageItems)
             {
                 if (item.Value.PageGuid == guid && item.Key != null)

SunnyUI/Controls/UISmoothLabel.cs

@@ -57,7 +57,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Controls/UISplitContainer.cs

@@ -91,7 +91,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Controls/UITabControl.cs

@@ -77,7 +77,7 @@ namespace Sunny.UI
             _fillColor = UIStyles.Blue.TabControlBackColor;
         }
 
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(null)]
         public IFrame Frame
         {
             get; set;
@@ -92,7 +92,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Controls/UITabControlMenu.cs

@@ -71,7 +71,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Controls/UIUserControl.cs

@@ -62,7 +62,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Controls/UIValve.cs

@@ -53,7 +53,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Forms/UIForm.cs

@@ -173,7 +173,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>

SunnyUI/Forms/UIFormHelper.cs

@@ -26,6 +26,7 @@
 
 using System;
 using System.Collections;
+using System.ComponentModel;
 using System.Drawing;
 using System.Windows.Forms;
 
@@ -50,6 +51,20 @@ namespace Sunny.UI
         }
     }
 
+    public class PageDeselectingEventArgs : CancelEventArgs
+    {
+        private string _cancelReason;
+
+        public PageDeselectingEventArgs(bool cancel, string cancelReason) : base(cancel)
+        {
+            _cancelReason = cancelReason;
+        }
+
+        public string CancelReason => _cancelReason;
+    }
+
+    public delegate void PageDeselectingEventHandler(object sender, PageDeselectingEventArgs e);
+
     public delegate void OnUIPageChanged(object sender, UIPageEventArgs e);
 
     public static class UIMessageDialog

SunnyUI/Frames/UIPage.cs

@@ -33,6 +33,7 @@
  * 2022-08-25: V3.2.3 重构多页面框架传值：页面发送给框架 SendParamToPage 函数
  * 2022-08-25: V3.2.3 重构多页面框架传值：接收框架、页面传值 ReceiveParams 事件
  * 2022-10-28: V3.2.6 标题栏增加扩展按钮
+ * 2023-02-24: V3.3.2 增加PageDeselecting，取消页面选择时增加判断
 ******************************************************************************/
 
 using System;
@@ -107,6 +108,15 @@ namespace Sunny.UI
             base.SizeGripStyle = SizeGripStyle.Hide;
         }
 
+        public event PageDeselectingEventHandler PageDeselecting;
+
+        internal bool OnPageDeselecting()
+        {
+            PageDeselectingEventArgs e = new PageDeselectingEventArgs(false, string.Empty);
+            PageDeselecting?.Invoke(this, e);
+            return e.Cancel;
+        }
+
         [Browsable(false)]
         public new IButtonControl AcceptButton
         {
@@ -235,7 +245,7 @@ namespace Sunny.UI
         /// <summary>
         /// 控件缩放前在其容器里的位置
         /// </summary>
-        [Browsable(false)]
+        [Browsable(false), DefaultValue(typeof(Rectangle), "0, 0, 0, 0")]
         public Rectangle ZoomScaleRect { get; set; }
 
         /// <summary>