:right-sidebar: True

ScrollUnit
===================================================================

.. currentmodule:: gi.repository.Gdk


.. versionadded:: 4.8




.. class:: ScrollUnit
   :no-contents-entry:






Specifies the unit of scroll deltas.

When you get :const:`~gi.repository.Gdk.ScrollUnit.WHEEL`, a delta of 1.0 means 1 wheel detent
click in the south direction, 2.0 means 2 wheel detent clicks in the south
direction... This is the same logic for negative values but in the north
direction.

If you get :const:`~gi.repository.Gdk.ScrollUnit.SURFACE`, are managing a scrollable view and get a
value of 123, you have to scroll 123 surface logical pixels right if it's
``delta_x`` or down if it's ``delta_y``\. This is the same logic for negative values
but you have to scroll left instead of right if it's ``delta_x`` and up instead
of down if it's ``delta_y``\.

1 surface logical pixel is equal to 1 real screen pixel multiplied by the
final scale factor of your graphical interface (the product of the desktop
scale factor and eventually a custom scale factor in your app).












Fields
------

.. rst-class:: interim-class

.. class:: ScrollUnit
   :no-index:
   

   .. attribute:: SURFACE

      The type of the None singleton.







   .. attribute:: WHEEL

      The type of the None singleton.