The fields property@Gtk.Adjustment:step-increment and
property@Gtk.Adjustment:page-increment fields are added to or subtracted
from the gtk.adjustment.Adjustment.gdouble when the user asks to move by a step
(using e.g. the cursor arrow keys) or by a page (using e.g. the Page Down/Up
keys).
gtk.scrollbar.Scrollbar has a main CSS node with name scrollbar and a subnode for its
contents. The main node gets the .horizontal or .vertical style classes applied,
depending on the scrollbar's orientation.
The range node gets the style class .fine-tune added when the scrollbar is
in 'fine-tuning' mode.
Other style classes that may be added to scrollbars inside
gtk.scrolled_window.ScrolledWindow include the positional classes (.left, .right,
.top, .bottom) and style classes related to overlay scrolling (.overlay-indicator,
.dragging, .hovering).
The gtk.scrollbar.Scrollbar widget is a horizontal or vertical scrollbar.
Its position and movement are controlled by the adjustment that is passed to or created by gtk.scrollbar.Scrollbar.new_. See gtk.adjustment.Adjustment for more details. The gtk.adjustment.Adjustment.gdouble field sets the position of the thumb and must be between gtk.adjustment.Adjustment.gdouble and gtk.adjustment.Adjustment.gdouble - property@Gtk.Adjustment:page-size. The property@Gtk.Adjustment:page-size represents the size of the visible scrollable area.
The fields property@Gtk.Adjustment:step-increment and property@Gtk.Adjustment:page-increment fields are added to or subtracted from the gtk.adjustment.Adjustment.gdouble when the user asks to move by a step (using e.g. the cursor arrow keys) or by a page (using e.g. the Page Down/Up keys).
CSS nodes
gtk.scrollbar.Scrollbar has a main CSS node with name scrollbar and a subnode for its contents. The main node gets the .horizontal or .vertical style classes applied, depending on the scrollbar's orientation.
The range node gets the style class .fine-tune added when the scrollbar is in 'fine-tuning' mode.
Other style classes that may be added to scrollbars inside gtk.scrolled_window.ScrolledWindow include the positional classes (.left, .right, .top, .bottom) and style classes related to overlay scrolling (.overlay-indicator, .dragging, .hovering).
Accessibility
gtk.scrollbar.Scrollbar uses the gtk.types.AccessibleRole.Scrollbar role.