{-# LINE 2 "./Graphics/UI/Gtk/Scrolling/VScrollbar.chs" #-}
-- -*-haskell-*-
-- GIMP Toolkit (GTK) Widget VScrollbar
--
-- Author : Axel Simon
--
-- Created: 23 May 2001
--
-- Copyright (C) 1999-2005 Axel Simon
--
-- This library is free software; you can redistribute it and/or
-- modify it under the terms of the GNU Lesser General Public
-- License as published by the Free Software Foundation; either
-- version 2.1 of the License, or (at your option) any later version.
--
-- This library is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-- Lesser General Public License for more details.
--
-- |
-- Maintainer : gtk2hs-users@lists.sourceforge.net
-- Stability : provisional
-- Portability : portable (depends on GHC)
--
-- A vertical scrollbar
--
module Graphics.UI.Gtk.Scrolling.VScrollbar (
-- * Detail
--
-- | The 'VScrollbar' widget is a widget arranged vertically creating a
-- scrollbar. See 'Scrollbar' for details on scrollbars. An 'Adjustment'
-- may be added to handle the adjustment of the scrollbar using
-- 'vScrollbarNew' or you can use 'vScrollbarNewDefaults' in
-- which case one will be created for you. See 'Adjustment' for details.
--
-- All interesting functions can be found in 'Range', from which it is derived.

-- * Class Hierarchy
-- |
-- @
-- | 'GObject'
-- | +----'Object'
-- | +----'Widget'
-- | +----'Range'
-- | +----'Scrollbar'
-- | +----VScrollbar
-- @

-- * Types
  VScrollbar,
  VScrollbarClass,
  castToVScrollbar, gTypeVScrollbar,
  toVScrollbar,

-- * Constructors
  vScrollbarNew,
  vScrollbarNewDefaults
  ) where

import Control.Monad (liftM)

import System.Glib.FFI
import Graphics.UI.Gtk.Abstract.Object (makeNewObject)
import Graphics.UI.Gtk.Types
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{-# LINE 68 "./Graphics/UI/Gtk/Scrolling/VScrollbar.chs" #-}

--------------------
-- Constructors

-- | Creates a new vertical scrollbar.
--
vScrollbarNew ::
    Adjustment -- ^ @adjustment@ - the 'Adjustment' to use.
 -> IO VScrollbar
vScrollbarNew :: Adjustment -> IO VScrollbar
vScrollbarNew Adjustment
adjustment =
  (ForeignPtr VScrollbar -> VScrollbar, FinalizerPtr VScrollbar)
-> IO (Ptr VScrollbar) -> IO VScrollbar
forall obj.
ObjectClass obj =>
(ForeignPtr obj -> obj, FinalizerPtr obj) -> IO (Ptr obj) -> IO obj
makeNewObject (ForeignPtr VScrollbar -> VScrollbar, FinalizerPtr VScrollbar)
forall {a}. (ForeignPtr VScrollbar -> VScrollbar, FinalizerPtr a)
mkVScrollbar (IO (Ptr VScrollbar) -> IO VScrollbar)
-> IO (Ptr VScrollbar) -> IO VScrollbar
forall a b. (a -> b) -> a -> b
$
  (Ptr Widget -> Ptr VScrollbar)
-> IO (Ptr Widget) -> IO (Ptr VScrollbar)
forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM (Ptr Widget -> Ptr VScrollbar
forall a b. Ptr a -> Ptr b
castPtr :: Ptr Widget -> Ptr VScrollbar) (IO (Ptr Widget) -> IO (Ptr VScrollbar))
-> IO (Ptr Widget) -> IO (Ptr VScrollbar)
forall a b. (a -> b) -> a -> b
$
  (\(Adjustment ForeignPtr Adjustment
arg1) -> ForeignPtr Adjustment
-> (Ptr Adjustment -> IO (Ptr Widget)) -> IO (Ptr Widget)
forall a b. ForeignPtr a -> (Ptr a -> IO b) -> IO b
withForeignPtr ForeignPtr Adjustment
arg1 ((Ptr Adjustment -> IO (Ptr Widget)) -> IO (Ptr Widget))
-> (Ptr Adjustment -> IO (Ptr Widget)) -> IO (Ptr Widget)
forall a b. (a -> b) -> a -> b
$ \Ptr Adjustment
argPtr1 ->Ptr Adjustment -> IO (Ptr Widget)
gtk_vscrollbar_new Ptr Adjustment
argPtr1)
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    adjustment

-- | Create a new HScrollbar without specifying an existing 'Adjustment'. A
-- new one will be created instead.
--
vScrollbarNewDefaults :: IO VScrollbar
vScrollbarNewDefaults :: IO VScrollbar
vScrollbarNewDefaults = Adjustment -> IO VScrollbar
vScrollbarNew (ForeignPtr Adjustment -> Adjustment
Adjustment ForeignPtr Adjustment
forall a. ForeignPtr a
nullForeignPtr)

foreign import ccall unsafe "gtk_vscrollbar_new"
  gtk_vscrollbar_new :: ((Ptr Adjustment) -> (IO (Ptr Widget)))