[Gui] C++ preparation for deprecation of QCheckBox…

…stateChanged -> checkStateChanged

src/Gui/PreferencePages/DlgSettingsLightSources.cpp

@@ -77,7 +77,11 @@ DlgSettingsLightSources::DlgSettingsLightSources(QWidget* parent)
                 this,
                 updateLightFunction);
         connect(colorButton, &ColorButton::changed, this, updateLightFunction);
+#if QT_VERSION >= QT_VERSION_CHECK(6,7,0)
+        connect(enabledCheckbox, &QCheckBox::checkStateChanged, this, updateLightFunction);
+#else
         connect(enabledCheckbox, &QCheckBox::stateChanged, this, updateLightFunction);
+#endif
     };
 
     const auto updateLight = [&](SoDirectionalLight* light,