Fix deleting pending editor controls if wxPG is destructed from within its own event handler.

If wxPG dtor is invoked from within event handler then deleting its pending editor controls should be delegated to the global idle event handler.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78031 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/propgrid/propgrid.cpp

@@ -539,8 +539,26 @@ wxPropertyGrid::~wxPropertyGrid()
                       wxS("Close(false).)") );
     }
 
-    // Delete pending editor controls
-    DeletePendingObjects();
+    if ( m_processedEvent )
+    {
+        // We are inside event handler and we cannot delete
+        // editor objects immediatelly. They have to be deleted
+        // later on in the global idle handler.
+#if !WXWIN_COMPATIBILITY_3_0
+        while ( !m_deletedEditorObjects.empty() )
+        {
+            wxObject* obj = m_deletedEditorObjects.back();
+            m_deletedEditorObjects.pop_back();
+
+            wxPendingDelete.Append(obj);
+        }
+#endif
+    }
+    else
+    {
+        // Delete pending editor controls
+        DeletePendingObjects();
+    }
 
     if ( m_doubleBuffer )
         delete m_doubleBuffer;