tdf#104573 - Assertion failed: SolarMutex not locked

Change-Id: Ie46f0e2b60b99aea1c322c7891a41a2e7603c9e9

include/vcl/event.hxx

@@ -317,6 +317,7 @@ public:
                             NotifyEvent( MouseNotifyEvent nEventType,
                                          vcl::Window* pWindow,
                                          const void* pEvent = nullptr );
+                            ~NotifyEvent();
 
     MouseNotifyEvent        GetType() const { return mnEventType; }
     vcl::Window*            GetWindow() const { return mpWindow; }

vcl/source/window/event.cxx

@@ -658,4 +658,10 @@ NotifyEvent::NotifyEvent( MouseNotifyEvent nEventType, vcl::Window* pWindow,
     mnEventType  = nEventType;
 }
 
+NotifyEvent::~NotifyEvent()
+{
+    SolarMutexGuard aVclGuard;
+    mpWindow.clear();
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

vcl/source/window/mouse.cxx

@@ -161,7 +161,10 @@ void Window::ImplCallMouseMove( sal_uInt16 nMouseCode, bool bModChanged )
 void Window::ImplGenerateMouseMove()
 {
     if ( !mpWindowImpl->mpFrameData->mnMouseMoveId )
+    {
+        SolarMutexGuard aVclGuard;
         mpWindowImpl->mpFrameData->mnMouseMoveId = Application::PostUserEvent( LINK( mpWindowImpl->mpFrameWindow, Window, ImplGenerateMouseMoveHdl ), nullptr, true );
+    }
 }
 
 IMPL_LINK_NOARG(Window, ImplGenerateMouseMoveHdl, void*, void)