1 files changed, 17 insertions, 0 deletions
diff --git a/src/plugins/platforms/windows/qwindowsmousehandler.h b/src/plugins/platforms/windows/qwindowsmousehandler.h
index 227a66babf..953649102a 100644
--- a/src/plugins/platforms/windows/qwindowsmousehandler.h
+++ b/src/plugins/platforms/windows/qwindowsmousehandler.h
@@ -66,6 +66,7 @@ public:
                              LRESULT *result);
 
     static inline Qt::MouseButtons keyStateToMouseButtons(int);
+    static inline int mouseButtonsToKeyState(Qt::MouseButtons);
 
     QWindow *windowUnderMouse() const { return m_windowUnderMouse.data(); }
 
@@ -93,6 +94,22 @@ Qt::MouseButtons QWindowsMouseHandler::keyStateToMouseButtons(int wParam)
     return mb;
 }
 
+int QWindowsMouseHandler::mouseButtonsToKeyState(Qt::MouseButtons mb)
+{
+    int result = 0;
+    if (mb & Qt::LeftButton)
+        result |= MK_LBUTTON;
+    if (mb & Qt::MiddleButton)
+        result |= MK_MBUTTON;
+    if (mb & Qt::RightButton)
+        result |= MK_RBUTTON;
+    if (mb & Qt::XButton1)
+        result |= MK_XBUTTON1;
+    if (mb & Qt::XButton2)
+        result |= MK_XBUTTON2;
+    return result;
+}
+
 QT_END_NAMESPACE
 
 #endif // QWINDOWSMOUSEHANDLER_H