refs #577, make read only checkboxes better readable

(by not disabling them, but using a little trick)

src/blackgui/guiutility.h

@@ -17,6 +17,7 @@
 #include "enableforframelesswindow.h"
 #include <QWidgetList>
 #include <QComboBox>
+#include <QCheckBox>
 #include <QCommandLineParser>
 
 namespace BlackGui
@@ -80,6 +81,9 @@ namespace BlackGui
         //! Metatype
         static const QString &swiftJsonDragAndDropMimeType();
 
+        //! Pseudo readonly state for checkbox
+        static void checkBoxReadOnly(QCheckBox *checkBox, bool readOnly);
+
     private:
         //! Constructor, use static methods only
         CGuiUtility() {}