4 files changed, 22 insertions, 0 deletions
diff --git a/src/gui/kernel/qplatformwindow.h b/src/gui/kernel/qplatformwindow.h
index d9f79f25eb..cded1fe316 100644
--- a/src/gui/kernel/qplatformwindow.h
+++ b/src/gui/kernel/qplatformwindow.h
@@ -102,6 +102,7 @@ public:
     virtual void lower();
 
     virtual bool isExposed() const;
+    virtual bool isActive() const;
 
     virtual void propagateSizeHints();
 
diff --git a/src/gui/kernel/qplatformwindow_qpa.cpp b/src/gui/kernel/qplatformwindow_qpa.cpp
index 88f2a6481e..d2ec6833b0 100644
--- a/src/gui/kernel/qplatformwindow_qpa.cpp
+++ b/src/gui/kernel/qplatformwindow_qpa.cpp
@@ -169,6 +169,17 @@ bool QPlatformWindow::isExposed() const
 }
 
 /*!
+    Returns true if the window should appear active from a style perspective.
+
+    This function can make platform-specific isActive checks, such as checking
+    if the QWindow is embedded in an active native window.
+*/
+bool QPlatformWindow::isActive() const
+{
+    return false;
+}
+
+/*!
     Requests setting the window state of this surface
     to \a type. Returns the actual state set.
 
diff --git a/src/plugins/platforms/windows/qwindowswindow.cpp b/src/plugins/platforms/windows/qwindowswindow.cpp
index aabea04c20..a7140a3d6d 100644
--- a/src/plugins/platforms/windows/qwindowswindow.cpp
+++ b/src/plugins/platforms/windows/qwindowswindow.cpp
@@ -807,6 +807,15 @@ bool QWindowsWindow::isVisible() const
     return m_data.hwnd && IsWindowVisible(m_data.hwnd);
 }
 
+bool QWindowsWindow::isActive() const
+{
+    // Check for native windows or children of the active native window.
+    if (const HWND activeHwnd = GetActiveWindow())
+        if (m_data.hwnd == activeHwnd || IsChild(activeHwnd, m_data.hwnd))
+            return true;
+    return false;
+}
+
 // partially from QWidgetPrivate::show_sys()
 void QWindowsWindow::show_sys() const
 {
diff --git a/src/plugins/platforms/windows/qwindowswindow.h b/src/plugins/platforms/windows/qwindowswindow.h
index 743e10dff9..182bef78e4 100644
--- a/src/plugins/platforms/windows/qwindowswindow.h
+++ b/src/plugins/platforms/windows/qwindowswindow.h
@@ -150,6 +150,7 @@ public:
 
     virtual void setVisible(bool visible);
     bool isVisible() const;
+    virtual bool isActive() const;
     virtual Qt::WindowFlags setWindowFlags(Qt::WindowFlags flags);
     virtual Qt::WindowState setWindowState(Qt::WindowState state);