From 8b871aebddf90e7536e653d32f6bcf8ea39df463 Mon Sep 17 00:00:00 2001
From: Dinesh Solanki <15937452+DineshSolanki@users.noreply.github.com>
Date: Thu, 18 Jun 2026 00:10:03 +0530
Subject: [PATCH] fix: ComboBox dropdown auto-closes when inside Menu control

Add mouse capture to ToggleBlock.OnMouseDown to prevent WPF's
Menu PopupControlService from closing the parent popup on mouse-up.
Without capture, the Menu sees the mouse-up event and closes the
hosting MenuItem popup, which cascades to close the ComboBox dropdown.

Fixes #1467
---
 .../HandyControl_Shared/Controls/Block/ToggleBlock.cs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/Shared/HandyControl_Shared/Controls/Block/ToggleBlock.cs b/src/Shared/HandyControl_Shared/Controls/Block/ToggleBlock.cs
index c0909169c..02d0a271a 100644
--- a/src/Shared/HandyControl_Shared/Controls/Block/ToggleBlock.cs
+++ b/src/Shared/HandyControl_Shared/Controls/Block/ToggleBlock.cs
@@ -94,10 +94,21 @@ e.ChangedButton is MouseButton.Right && ToggleGesture.MouseAction is MouseAction
             e.ChangedButton is MouseButton.Middle && ToggleGesture.MouseAction is MouseAction.MiddleDoubleClick &&
             e.ClickCount == 2)
         {
+            CaptureMouse();
             ControlCommands.Toggle.Execute(null, this);
         }
     }
 
+    protected override void OnMouseUp(MouseButtonEventArgs e)
+    {
+        base.OnMouseUp(e);
+
+        if (IsMouseCaptured)
+        {
+            ReleaseMouseCapture();
+        }
+    }
+
     private void OnToggled(object sender, ExecutedRoutedEventArgs e)
     {
         SetCurrentValue(IsCheckedProperty, IsChecked == true ? ValueBoxes.FalseBox : ValueBoxes.TrueBox);