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Object Hierarchy
GObject ╰── GInitiallyUnowned ╰── GtkWidget ╰── GtkRange ╰── GtkScrollbar ├── GtkHScrollbar ╰── GtkVScrollbar
Description
The GtkScrollbar widget is a horizontal or vertical scrollbar, depending on the value of the “orientation” property.
The position of the thumb in a scrollbar is controlled by the scroll
adjustments. See GtkAdjustment for the fields in an adjustment - for
GtkScrollbar, the “value” field represents the position
of the scrollbar, which must be between the “lower” field
and “upper” - “page-size”. The
“page-size” field represents the size of the visible
scrollable area. The “step-increment” and
“page-increment” fields are properties when the user asks to
step down (using the small stepper arrows) or page down (using for
example the Page Down key).
CSS nodes
1 2 3 4 5 6 7 8 |
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).
Functions
gtk_scrollbar_new ()
GtkWidget * gtk_scrollbar_new (GtkOrientation orientation,GtkAdjustment *adjustment);
Creates a new scrollbar with the given orientation.
Parameters
orientation |
the scrollbar’s orientation. |
|
adjustment |
the GtkAdjustment to use, or |
[allow-none] |
Since: 3.0
Style Property Details
The “fixed-slider-length” style property
“fixed-slider-length” gboolean
Don't change slider size, just lock it to the minimum length.
Flags: Read
Default value: FALSE
The “has-backward-stepper” style property
“has-backward-stepper” gboolean
Display the standard backward arrow button.
Flags: Read
Default value: TRUE
The “has-forward-stepper” style property
“has-forward-stepper” gboolean
Display the standard forward arrow button.
Flags: Read
Default value: TRUE
The “has-secondary-backward-stepper” style property
“has-secondary-backward-stepper” gboolean
Display a second backward arrow button on the opposite end of the scrollbar.
Flags: Read
Default value: FALSE
The “has-secondary-forward-stepper” style property
“has-secondary-forward-stepper” gboolean
Display a second forward arrow button on the opposite end of the scrollbar.
Flags: Read
Default value: FALSE
The “min-slider-length” style property
“min-slider-length” gint
Minimum length of scrollbar slider.
GtkScrollbar:min-slider-length has been deprecated since version 3.20 and should not be used in newly-written code.
Use min-height/min-width CSS properties on the slider element instead. The value of this style property is ignored.
Flags: Read
Allowed values: >= 0
Default value: 21