The #GtkScrollbar widget is a horizontal or vertical scrollbar,
depending on the value of the #GtkOrientable:orientation property.
Its position and movement are controlled by the adjustment that is passed to
or created by gtk.scrollbar.Scrollbar.new_. See #GtkAdjustment for more details. The
#GtkAdjustment:value field sets the position of the thumb and must be between
#GtkAdjustment:lower and #GtkAdjustment:upper - #GtkAdjustment:page-size. The
#GtkAdjustment:page-size represents the size of the visible scrollable area.
The fields #GtkAdjustment:step-increment and #GtkAdjustment:page-increment
fields are added to or subtracted from the #GtkAdjustment:value when the user
asks to move by a step (using e.g. the cursor arrow keys or, if present, the
stepper buttons) or by a page (using e.g. the Page Down/Up keys).
GtkScrollbar has a main CSS node with name scrollbar and a subnode for its
contents, with subnodes named trough and slider.
The main node gets the style class .fine-tune added when the scrollbar is
in 'fine-tuning' mode.
If steppers are enabled, they are represented by up to four additional
subnodes with name button. These get the style classes .up and .down to
indicate in which direction they are moving.
Other style classes that may be added to scrollbars inside #GtkScrolledWindow
include the positional classes (.left, .right, .top, .bottom) and style
classes related to overlay scrolling (.overlay-indicator, .dragging, .hovering).
The #GtkScrollbar widget is a horizontal or vertical scrollbar, depending on the value of the #GtkOrientable:orientation property.
Its position and movement are controlled by the adjustment that is passed to or created by gtk.scrollbar.Scrollbar.new_. See #GtkAdjustment for more details. The #GtkAdjustment:value field sets the position of the thumb and must be between #GtkAdjustment:lower and #GtkAdjustment:upper - #GtkAdjustment:page-size. The #GtkAdjustment:page-size represents the size of the visible scrollable area. The fields #GtkAdjustment:step-increment and #GtkAdjustment:page-increment fields are added to or subtracted from the #GtkAdjustment:value when the user asks to move by a step (using e.g. the cursor arrow keys or, if present, the stepper buttons) or by a page (using e.g. the Page Down/Up keys).
CSS nodes
scrollbar[.fine-tune] ╰── contents ├── [button.up] ├── [button.down] ├── trough │ ╰── slider ├── [button.up] ╰── [button.down]GtkScrollbar has a main CSS node with name scrollbar and a subnode for its contents, with subnodes named trough and slider.
The main node gets the style class .fine-tune added when the scrollbar is in 'fine-tuning' mode.
If steppers are enabled, they are represented by up to four additional subnodes with name button. These get the style classes .up and .down to indicate in which direction they are moving.
Other style classes that may be added to scrollbars inside #GtkScrolledWindow include the positional classes (.left, .right, .top, .bottom) and style classes related to overlay scrolling (.overlay-indicator, .dragging, .hovering).