50 m_editor =
new qdesigner_internal::SignalSlotEditor(formWindow(),
nullptr);
51 connect(formWindow(), &QDesignerFormWindowInterface::mainContainerChanged,
52 m_editor.data(), &SignalSlotEditor::setBackground);
53 connect(formWindow(), &QDesignerFormWindowInterface::changed,
54 m_editor.data(), &SignalSlotEditor::updateBackground);