enum ColorRole { WindowText, Button, Light, Midlight, Dark, Mid,
                     Text, BrightText, ButtonText, Base, Window, Shadow,
                     Highlight, HighlightedText,
                     Link, LinkVisited, // ### Qt 5: remove
                     AlternateBase,
                     NoRole, // ### Qt 5: value should be 0 or -1
                     ToolTipBase, ToolTipText,
                     NColorRoles = ToolTipText + 1,
                     Foreground = WindowText, Background = Window // ### Qt 5: remove
                   };