Allow reparenting wxPropertyGrid(Manager) to work; Show error and suggest calling wxPropertyGrid::OnTLPChanging() if top-level parent changed indirectly.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@60989 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/propgrid/manager.cpp

@@ -528,6 +528,18 @@ void wxPropertyGridManager::SetWindowStyleFlag( long style )
 
 // -----------------------------------------------------------------------
 
+bool wxPropertyGridManager::Reparent( wxWindowBase *newParent )
+{
+    if ( m_pPropGrid )
+        m_pPropGrid->OnTLPChanging((wxWindow*)newParent);
+
+    bool res = wxPanel::Reparent(newParent);
+
+    return res;
+}
+
+// -----------------------------------------------------------------------
+
 // Actually shows given page.
 bool wxPropertyGridManager::DoSelectPage( int index )
 {