Graphics.UI.Gtk.Abstract.Scrollbar

gtk-0.12.4: Binding to the Gtk+ graphical user interface library.

Portability | portable (depends on GHC)
Stability | provisional
Maintainer | gtk2hs-users@lists.sourceforge.net
Safe Haskell | None

Graphics.UI.Gtk.Abstract.Scrollbar

Contents

- Detail
- Class Hierarchy
- Types

Description

Base class for `HScrollbar` and `VScrollbar`

Synopsis

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

# Detail

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

The position of the thumb in a scrollbar is controlled by the scroll adjustments. See `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

     |  GObject
     |   +----Object
     |         +----Widget
     |               +----Range
     |                     +----Scrollbar
     |                           +----HScrollbar
     |                           +----VScrollbar

# Types

data Scrollbar

Instances

Eq Scrollbar |
Ord Scrollbar |
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

gTypeScrollbar :: GType

toScrollbar :: ScrollbarClass o => o -> Scrollbar