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Gnome::Gtk4::Scrollbar
Table of Contents
Description§
The Gnome::Gtk4::Scrollbar widget is a horizontal or vertical scrollbar.
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=for image :class<inline> :src<asset_files/images/scrollbar.png> :width<30\%>Its position and movement are controlled by the adjustment that is passed to or created by .newscrollbar(). See Gnome::Gtk4::Adjustment for more details. The value defined in Gnome::Gtk4::Adjustment field sets the position of the thumb and must be between lower defined in Gnome::Gtk4::Adjustment and upper defined in Gnome::Gtk4::Adjustment - page-size defined in Gnome::Gtk4::Adjustment. The page-size defined in Gnome::Gtk4::Adjustment represents the size of the visible scrollable area.
The fields step-increment defined in Gnome::Gtk4::Adjustment and page-increment defined in Gnome::Gtk4::Adjustment fields are added to or subtracted from the value defined in Gnome::Gtk4::Adjustment 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§
Gnome::Gtk4::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 Gnome::Gtk4::ScrolledWindow include the positional classes (.left, .right, .top, .bottom) and style classes related to overlay scrolling (.overlay-indicator, .dragging, .hovering).
Accessibility§
Gnome::Gtk4::Scrollbar uses the GTK_ACCESSIBLE_ROLE_SCROLLBAR role.
Uml Diagram§
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=for image :class<inline> :src<asset_files/images/plantuml/Scrollbar.png> :width<70\%>Class initialization§
new§
:native-object§
Create an object using a native object from an object of the same type found elsewhere. See also Gnome::N::TopLevelSupportClass.
multi method new ( N-Object() :$native-object! )
new-scrollbar§
Creates a new scrollbar with the given orientation.
method new-scrollbar ( GtkOrientation $orientation, N-Object() $adjustment --> Gnome::Gtk4::Scrollbar )
- $orientation; the scrollbar’s orientation..
- $adjustment; the Gnome::Gtk4::Adjustment to use, or undefined to create a new adjustment..
Methods§
get-adjustment§
Returns the scrollbar's adjustment.
method get-adjustment (--> N-Object )
Return value; the scrollbar's adjustment.
set-adjustment§
Makes the scrollbar use the given adjustment.
method set-adjustment ( N-Object() $adjustment )
- $adjustment; the adjustment to set.