更新

WPFluent/Controls/TitleBar/TitleBar.cs

@@ -239,16 +239,13 @@ public class TitleBar : System.Windows.Controls.Control
         remove => RemoveHandler(MinimizeClickedEvent, value);
     }
 
-    private void CloseWindow()
-    {
-        currentWindow.Close();
-    }
+    private void CloseWindow() { currentWindow.Close(); }
 
     private T GetTemplateChild<T>(string name) where T : DependencyObject
     {
         var element = GetTemplateChild(name);
 
-        if (element is not T tElement)
+        if(element is not T tElement)
         {
             throw new InvalidOperationException($"Template part '{name}' is not found or is not of type {typeof(T)}");
         }
@@ -260,7 +257,7 @@ public class TitleBar : System.Windows.Controls.Control
     {
         var message = (User32.WM)msg;
 
-        if (message
+        if(message
             is not (
                 User32.WM.NCHITTEST
                 or User32.WM.NCMOUSELEAVE
@@ -271,22 +268,22 @@ public class TitleBar : System.Windows.Controls.Control
             return IntPtr.Zero;
         }
 
-        foreach (TitleBarButton button in buttons)
+        foreach(TitleBarButton button in buttons)
         {
-            if (!button.ReactToHwndHook(message, lParam, out IntPtr returnIntPtr))
+            if(!button.ReactToHwndHook(message, lParam, out IntPtr returnIntPtr))
             {
                 continue;
             }
 
             // 修复了有时未正确清除按钮悬停背景，导致多个按钮看起来好像悬停的问题。
-            foreach (TitleBarButton anotherButton in buttons)
+            foreach(TitleBarButton anotherButton in buttons)
             {
-                if (anotherButton == button)
+                if(anotherButton == button)
                 {
                     continue;
                 }
 
-                if (anotherButton.IsHovered && button.IsHovered)
+                if(anotherButton.IsHovered && button.IsHovered)
                 {
                     anotherButton.RemoveHover();
                 }
@@ -313,7 +310,7 @@ public class TitleBar : System.Windows.Controls.Control
         //    }
         //}
 
-        switch (message)
+        switch(message)
         {
             case User32.WM.NCHITTEST when CloseWindowByDoubleClickOnIcon && icon.IsMouseOverElement(lParam):
                 // Ideally, clicking on the icon should open the system menu, but when the system menu is opened manually, double-clicking on the icon does not close the window
@@ -329,19 +326,19 @@ public class TitleBar : System.Windows.Controls.Control
 
     private void MaximizeWindow()
     {
-        if (!CanMaximize)
+        if(!CanMaximize)
         {
             return;
         }
 
-        if (MaximizeActionOverride is not null)
+        if(MaximizeActionOverride is not null)
         {
             MaximizeActionOverride(this, currentWindow);
 
             return;
         }
 
-        if (currentWindow.WindowState == WindowState.Normal)
+        if(currentWindow.WindowState == WindowState.Normal)
         {
             SetCurrentValue(IsMaximizedProperty, true);
             currentWindow.SetCurrentValue(Window.WindowStateProperty, WindowState.Maximized);
@@ -355,7 +352,7 @@ public class TitleBar : System.Windows.Controls.Control
 
     private void MinimizeWindow()
     {
-        if (MinimizeActionOverride is not null)
+        if(MinimizeActionOverride is not null)
         {
             MinimizeActionOverride(this, currentWindow);
 
@@ -367,18 +364,19 @@ public class TitleBar : System.Windows.Controls.Control
 
     private void OnParentWindowStateChanged(object sender, EventArgs e)
     {
-        if (IsMaximized != (currentWindow.WindowState == WindowState.Maximized))
+        if(IsMaximized != (currentWindow.WindowState == WindowState.Maximized))
         {
             SetCurrentValue(IsMaximizedProperty, currentWindow.WindowState == WindowState.Maximized);
         }
     }
+
     /// <summary>
     /// 设置窗口状态
     /// </summary>
     /// <param name="buttonType"></param>
     private void OnTemplateButtonClick(TitleBarButtonType buttonType)
     {
-        switch (buttonType)
+        switch(buttonType)
         {
             case TitleBarButtonType.Maximize
             or TitleBarButtonType.Restore:
@@ -413,7 +411,7 @@ public class TitleBar : System.Windows.Controls.Control
     /// </summary>
     private void OnWindowContentRendered(object sender, EventArgs e)
     {
-        if (sender is not Window window)
+        if(sender is not Window window)
         {
             return;
         }
@@ -433,7 +431,7 @@ public class TitleBar : System.Windows.Controls.Control
     {
         var point = PointToScreen(e.GetPosition(this));
 
-        if (dpiScale is null)
+        if(dpiScale is null)
         {
             throw new InvalidOperationException("dpiScale is not initialized.");
         }
@@ -445,8 +443,10 @@ public class TitleBar : System.Windows.Controls.Control
 
     protected virtual void OnLoaded(object sender, RoutedEventArgs e)
     {
-        currentWindow =
-            System.Windows.Window.GetWindow(this) ?? throw new InvalidOperationException("Window is null");
+        // 添加设计时检查
+        if (DesignerProperties.GetIsInDesignMode(this))
+            return;
+        currentWindow = System.Windows.Window.GetWindow(this) ?? throw new InvalidOperationException("Window is null");
         currentWindow.StateChanged += OnParentWindowStateChanged;
         currentWindow.ContentRendered += OnWindowContentRendered;
     }
@@ -466,7 +466,7 @@ public class TitleBar : System.Windows.Controls.Control
 
         _parentWindow = VisualTreeHelper.GetParent(this);
 
-        while (_parentWindow is not null and not Window)
+        while(_parentWindow is not null and not Window)
         {
             _parentWindow = VisualTreeHelper.GetParent(_parentWindow);
         }