This method allows to scale a pixel value by a DPI-dependent factor to the value used by the underlying toolkit only if necessary, i.e. when not using GTK+ 3 or OS X which already do this internally.
This method allows to scale a pixel value by a DPI-dependent factor to the value used by the underlying toolkit only if necessary, i.e. when not using GTK+ 3 or OS X which already do this internally.