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Graphics.UI.Gtk.Abstract.Scrollbar

Portability | portable (depends on GHC)
Stability | provisional
Maintainer | gtk2hs-users@lists.sourceforge.net

Contents

Detail
Class Hierarchy
Types

Description
Base class for Graphics.UI.Gtk.Scrolling.HScrollbar and Graphics.UI.Gtk.Scrolling.VScrollbar
Synopsis

data Scrollbar
class RangeClass o => ScrollbarClass o
castToScrollbar :: GObjectClass obj => obj -> Scrollbar
toScrollbar :: ScrollbarClass o => o -> Scrollbar

Detail

The `Scrollbar` widget is an abstract base class for Graphics.UI.Gtk.Scrolling.HScrollbar and Graphics.UI.Gtk.Scrolling.VScrollbar. It is not very useful in itself.

The position of the thumb in a scrollbar is controlled by the scroll adjustments. See Graphics.UI.Gtk.Misc.Adjustment for the fields in an adjustment - for `Scrollbar`, 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 used when the user asks to step down (using the small stepper arrows) or page down (using for example the PageDown key).

Class Hierarchy

     |  System.Glib.GObject
     |   +----Graphics.UI.Gtk.Abstract.Object
     |         +----Graphics.UI.Gtk.Abstract.Widget
     |               +----Graphics.UI.Gtk.Abstract.Range
     |                     +----Scrollbar
     |                           +----Graphics.UI.Gtk.Scrolling.HScrollbar
     |                           +----Graphics.UI.Gtk.Scrolling.VScrollbar

Types
data Scrollbar

Instances

GObjectClass Scrollbar
ScrollbarClass Scrollbar
RangeClass Scrollbar
WidgetClass Scrollbar
ObjectClass Scrollbar

class RangeClass o => ScrollbarClass o

Instances

ScrollbarClass VScrollbar
ScrollbarClass HScrollbar
ScrollbarClass Scrollbar

castToScrollbar :: GObjectClass obj => obj -> Scrollbar
toScrollbar :: ScrollbarClass o => o -> Scrollbar
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