{-# LINE 2 "./Graphics/UI/Gtk/Windows/OffscreenWindow.chs" #-} -- -*-haskell-*- -- GIMP Toolkit (GTK) Widget OffscreenWindow -- -- Author : Andy Stewart -- -- Created: 25 Mar 2010 -- -- Copyright (C) 2010 Andy Stewart -- -- 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 toplevel container widget used to manage offscreen rendering of child widgets. -- -- * Module available since Gtk+ version 2.20 -- module Graphics.UI.Gtk.Windows.OffscreenWindow ( -- * Detail -- | 'OffscreenWindow' is strictly intended to be used for obtaining snapshots of widgets that are not -- part of a normal widget hierarchy. It differs from 'widgetGetSnapshot' in that the widget you -- want to get a snapshot of need not be displayed on the user's screen as a part of a widget -- hierarchy. However, since 'OffscreenWindow' is a toplevel widget you cannot obtain snapshots of a -- full window with it since you cannot pack a toplevel widget in another toplevel. -- -- The idea is to take a widget and manually set the state of it, add it to a 'OffscreenWindow' and -- then retrieve the snapshot as a 'Pixmap' or 'Pixbuf'. -- -- 'OffscreenWindow' derives from 'Window' only as an implementation detail. Applications should not -- use any API specific to 'Window' to operate on this object. It should be treated as a 'Bin' that -- has no parent widget. -- -- When contained offscreen widgets are redrawn, 'OffscreenWindow' will emit a 'damageEvent' signal. -- * Class Hierarchy -- | -- @ -- | 'GObject' -- | +----'Object' -- | +----'Widget' -- | +----'Container' -- | +----'Bin' -- | +----Window -- | +----'OffscreenWindow' -- @ {-# LINE 73 "./Graphics/UI/Gtk/Windows/OffscreenWindow.chs" #-} ) where import Control.Monad (liftM) import System.Glib.FFI import System.Glib.Attributes import System.Glib.Properties import Graphics.UI.Gtk.Abstract.Object (makeNewObject) import Graphics.UI.Gtk.Types {-# LINE 82 "./Graphics/UI/Gtk/Windows/OffscreenWindow.chs" #-} {-# LINE 84 "./Graphics/UI/Gtk/Windows/OffscreenWindow.chs" #-}