-- GENERATED by C->Haskell Compiler, version 0.13.9 (gtk2hs branch) "Bin IO", 27 May 2012 (Haskell)
-- Edit the ORIGNAL .chs file instead!


{-# LINE 1 "./Graphics/UI/Gtk/ModelView/CustomStore.chs" #-}
-- -*-haskell-*-
--  GIMP Toolkit (GTK) CustomStore TreeModel
--
--  Author : Duncan Coutts, Axel Simon
--
--  Created: 19 Sep 2005
--
--  Copyright (C) 2005 Duncan Coutts, 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.
-- #prune

-- |
-- Maintainer  : gtk2hs-users@lists.sourceforge.net
-- Stability   : provisional
-- Portability : portable (depends on GHC)
--
-- Allows a custom data structure to be used with the 'TreeView' and other
-- widgets that follow the model-view-controller paradigm. The two models
-- 'Graphics.UI.Gtk.ModelView.ListStore.ListStore' and
-- 'Graphics.UI.Gtk.ModelView.TreeStore.TreeStore' are based on the
-- 'CustomStore'. Even if no application-specific tree model
-- should be implemented, this module is relevant in that it provides the
-- functions 'customStoreSetColumn' and
-- 'customStoreGetRow' functions.
--
module Graphics.UI.Gtk.ModelView.CustomStore (
  -- * The definition of a row-based store.  
  CustomStore,
  TreeModelFlags(..),
  TreeModelIface(..),
  DragSourceIface(..),
  DragDestIface(..),
  customStoreNew,
  customStoreGetRow,
  customStoreSetColumn,
  customStoreGetPrivate,
  customStoreGetStamp,
  customStoreInvalidateIters,
  -- for backwards compatability, not documented
  treeModelGetRow,
  treeModelSetColumn,
  ) where

import Control.Monad	                        (liftM, when)
import Control.Monad.Reader                     (runReaderT)
import Data.IORef                               (IORef, newIORef, readIORef, writeIORef)
import Data.Maybe                               (fromMaybe)
import System.Glib.FFI			hiding	(maybeNull)
import System.Glib.Flags			(Flags, fromFlags)
import System.Glib.GObject			(GObjectClass(..), GObject(..), unGObject,
                                                 makeNewGObject, objectUnref)
import Graphics.UI.Gtk.Types
{-# LINE 61 "./Graphics/UI/Gtk/ModelView/CustomStore.chs" #-}
import Graphics.UI.Gtk.ModelView.Types
{-# LINE 62 "./Graphics/UI/Gtk/ModelView/CustomStore.chs" #-}
import Graphics.UI.Gtk.General.DNDTypes         (SelectionDataM, SelectionData)

import System.Glib.StoreValue			(TMType(..), GenericValue(..), valueSetGenericValue)
import System.Glib.GValue			(GValue(GValue), allocaGValue)
import System.Glib.GType			(GType)
import System.Glib.GValueTypes                  (valueSetString)
import qualified System.Glib.GTypeConstants as GConst
import System.Glib.GValueTypes
{-# LINE 70 "./Graphics/UI/Gtk/ModelView/CustomStore.chs" #-}
import System.Glib.GValue			(valueInit)


{-# LINE 73 "./Graphics/UI/Gtk/ModelView/CustomStore.chs" #-}

-- | These flags indicate various properties of a
-- 'Graphics.UI.Gtk.ModelView.TreeModel.TreeModel'.
--
-- * If a model has 'TreeModelItersPersist' set, iterators remain valid after
--   a 'Graphics.UI.Gtk.ModelView.TreeModel.TreeModel' signal was emitted.
--
-- * The 'TreeModelListOnly' flag is set if the rows are arranged in a simple
--   flat list. This is set in the
--   'Graphics.UI.Gtk.ModelView.ListStore.ListStore' implementation.
--
data TreeModelFlags = TreeModelItersPersist
                    | TreeModelListOnly
                    deriving (Bounded)
instance Enum TreeModelFlags where
  fromEnum TreeModelItersPersist = 1
  fromEnum TreeModelListOnly = 2

  toEnum 1 = TreeModelItersPersist
  toEnum 2 = TreeModelListOnly
  toEnum unmatched = error ("TreeModelFlags.toEnum: Cannot match " ++ show unmatched)

  succ TreeModelItersPersist = TreeModelListOnly
  succ _ = undefined

  pred TreeModelListOnly = TreeModelItersPersist
  pred _ = undefined

  enumFromTo x y | fromEnum x == fromEnum y = [ y ]
                 | otherwise = x : enumFromTo (succ x) y
  enumFrom x = enumFromTo x TreeModelListOnly
  enumFromThen _ _ =     error "Enum TreeModelFlags: enumFromThen not implemented"
  enumFromThenTo _ _ _ =     error "Enum TreeModelFlags: enumFromThenTo not implemented"

{-# LINE 85 "./Graphics/UI/Gtk/ModelView/CustomStore.chs" #-}

instance Flags TreeModelFlags

-- A 'CustomStore' is backed by a Gtk2HsStore
-- which is an instance of the GtkTreeModel GInterface
-- it also stores some extra per-model-type private data

-- | A 'CustomStore' is an instance of a Gtk+ 'TreeModel' and can thus be used
--   for any widget that stores data in a 'TreeModel'. The user may either
--   create an instance of a 'CustomStore' or use one of the pre-defined
--   models 'Graphics.UI.Gtk.ModelView.ListStore.ListStore' or
--   'Graphics.UI.Gtk.ModelView.TreeStore.TreeStore'.
newtype CustomStore private row = CustomStore (ForeignPtr (CustomStore private row))

instance TreeModelClass (CustomStore private row)
instance GObjectClass (CustomStore private row) where
  toGObject (CustomStore tm) = GObject (castForeignPtr tm)
  unsafeCastGObject = CustomStore . castForeignPtr . unGObject

-- | Type synonym for viewing the store as a set of columns.
type ColumnMap row = IORef [ColumnAccess row]

-- | Create a new 'ColumnMap' value.
columnMapNew :: IO (ColumnMap row)
columnMapNew = newIORef []

-- | Set or update a column mapping. This function should be used before
--   the model is installed into a widget since the number of defined
--   columns are only checked once by widgets.
customStoreSetColumn :: TypedTreeModelClass model
	=> model row -- ^ the store in which to allocate a new column
	-> (ColumnId row ty) -- ^ the column that should be set
	-> (row -> ty) -- ^ the function that sets the property
	-> IO ()
customStoreSetColumn model (ColumnId _ setter colId) acc | colId<0 = return ()
                                                         | otherwise =
  case toTypedTreeModel model of
    TypedTreeModel model -> do
      ptr <- withForeignPtr model gtk2hs_store_get_impl
      impl <- deRefStablePtr ptr
      let cMap = customStoreColumns impl
      cols <- readIORef cMap
      let l = length cols
      if colId>=l then do
         let fillers = replicate (colId-l) CAInvalid
         writeIORef cMap (cols++fillers++[setter acc])
       else do
         let (beg,_:end) = splitAt colId cols
         writeIORef cMap (beg++setter acc:end)

-- this is a backwards compatability definition
treeModelSetColumn :: TypedTreeModelClass model
	=> model row -- ^ the store in which to allocate a new column
	-> (ColumnId row ty) -- ^ the column that should be set
	-> (row -> ty) -- ^ the function that sets the property
	-> IO ()
treeModelSetColumn = customStoreSetColumn

data CustomStoreImplementation model row = CustomStoreImplementation {
    customStoreColumns          :: ColumnMap row,	                -- provide access via columns
    customStoreIface            :: TreeModelIface row,            -- functions implementing a tree model
    customTreeDragSourceIface   :: DragSourceIface model row,     -- the drag and drop source interface
    customTreeDragDestIface     :: DragDestIface model row        -- the drag and drop dest interface
  }

-- | The 'TreeModelIface' structure contains all functions that are required
-- to implement an application-specific 'TreeModel'.
data TreeModelIface row = TreeModelIface {
    -- | Return the flags that are valid for this model.
    treeModelIfaceGetFlags      :: IO [TreeModelFlags],
    -- | Convert an path into the tree into a more concise 'TreeIter'.
    --   Return @Nothing@ if the path does not exit.
    treeModelIfaceGetIter       :: TreePath -> IO (Maybe TreeIter),              -- convert a path to an iterator
    -- | Convert an iterator to a path. The iterator will always be valid.
    treeModelIfaceGetPath       :: TreeIter -> IO TreePath,                      -- convert an interator to a path
    -- | Retrieve a row at the given iterator.
    treeModelIfaceGetRow        :: TreeIter -> IO row,                           -- get the row at an iter
    -- | Advance the given iterator to the next node at the same level.
    --   Return @Nothing@ if there is no next node at this level.
    treeModelIfaceIterNext      :: TreeIter -> IO (Maybe TreeIter),              -- following row (if any)
    -- | Advance the given iterator to the first child of this iterator.
    --   Return @Notihing@ if the node at this iterator has no children.
    treeModelIfaceIterChildren  :: Maybe TreeIter -> IO (Maybe TreeIter),        -- first child row (if any)
    -- | Check if the node at the given iterator has children.
    treeModelIfaceIterHasChild  :: TreeIter -> IO Bool,                          -- row has any children at all
    -- | Query the number of children the the node at the given iteratore has.
    treeModelIfaceIterNChildren :: Maybe TreeIter -> IO Int,                     -- number of children of a row
    -- | Ask for an iterator to the @n@th child. Return @Nothing@ if
    --   no such child exists.
    treeModelIfaceIterNthChild  :: Maybe TreeIter -> Int -> IO (Maybe TreeIter), -- nth child row of a given row
    -- | Ask for an iterator to the parent of the node.
    treeModelIfaceIterParent    :: TreeIter -> IO (Maybe TreeIter),              -- parent row of a row
    -- | Increase a reference count for this node. A positive reference count
    --   indicates that the node is used (that is, most likely it is visible)
    --   in at least one widget. Tracking reference counts for nodes is
    --   optional but may be useful to infer when a given row can be discarded
        --   if it was retrieved from an external source.
    treeModelIfaceRefNode       :: TreeIter -> IO (),                            -- caching hint
    -- | Decrement the reference count of the given node.
    treeModelIfaceUnrefNode     :: TreeIter -> IO ()                             -- caching hint
  }

-- | A structure containing functions that enable this widget to be used
--   as a source in drag-and-drop.
data DragSourceIface model row = DragSourceIface {
    -- | Determine if the row at the given path is draggable. Return
    --   @False@ if for some reason this row should not be dragged by
    --   the user.
    treeDragSourceRowDraggable  :: model row -> TreePath -> IO Bool,                 -- query if the row is draggable
    -- | Fill in the 'SelectionDataM' structure with information on
    --   the given node using
    --   'Graphics.UI.Gtk.General.Selection.selectionDataSet'.
    treeDragSourceDragDataGet   :: model row -> TreePath -> SelectionDataM Bool,     -- store row in selection object
    -- | The widget is informed that the row at the given path should
    --   be deleted as the result of this drag.
    treeDragSourceDragDataDelete:: model row -> TreePath -> IO Bool                  -- instruct store to delete the row
  }

-- | A structure containing functions that enable this widget to be used
--   as a target in drag-and-drop.
data DragDestIface model row = DragDestIface {
    -- | Tell the drag-and-drop mechanism if the row can be dropped at the
    --   given path.
    treeDragDestRowDropPossible :: model row -> TreePath -> SelectionDataM Bool,     -- query if row drop is possible
    -- | The data in the 'SelectionDataM' structure should be read using
    --   'Graphics.UI.Gtk.General.Selection.selectionDataGet' and
    --   its information be used to insert a new row at the given path.
    treeDragDestDragDataReceived:: model row -> TreePath -> SelectionDataM Bool      -- insert row from selection object
  }
  
-- | Create a new store that implements the 'TreeModelIface' interface and
-- optionally the 'DragSourceIface' and the 'DragDestIface'. If the latter two
-- are set to @Nothing@ a dummy interface is substituted that rejects every
-- drag and drop.
customStoreNew :: (TreeModelClass (model row), TypedTreeModelClass model) =>
     private   -- ^ Any private data the store needs to store. Usually an 'IORef'.
  -> ((CustomStore private row) -> model row)
  -> TreeModelIface row         -- ^ Functions necessary to implement the 'TreeModel' interface.
  -> Maybe (DragSourceIface model row)
                                -- ^ Functions to enable this store to generate drag events.
  -> Maybe (DragDestIface model row)
                                -- ^ Functions to enable this store to receive drag events.
  -> IO (model row)
customStoreNew priv con tmIface mDragSource mDragDest = do
  cMap <- columnMapNew
  let dummyDragSource = DragSourceIface { treeDragSourceRowDraggable = \_ _ -> return False,
                                          treeDragSourceDragDataGet  = \_ _ -> return False,
                                          treeDragSourceDragDataDelete = \_ _ -> return False }
  let dummyDragDest = DragDestIface { treeDragDestRowDropPossible = \_ _ -> return False,
                                      treeDragDestDragDataReceived = \_ _ -> return False }
  implPtr <- newStablePtr CustomStoreImplementation {
        customStoreColumns = cMap,
        customStoreIface = tmIface,
        customTreeDragSourceIface = fromMaybe dummyDragSource mDragSource,
        customTreeDragDestIface = fromMaybe dummyDragDest mDragDest }
  privPtr <- newStablePtr priv
  liftM con $ wrapNewGObject (CustomStore, objectUnref) $
    gtk2hs_store_new implPtr privPtr

foreign import ccall unsafe "Gtk2HsStore.h gtk2hs_store_new"
  gtk2hs_store_new :: StablePtr (CustomStoreImplementation model row)
                   -> StablePtr private
                   -> IO (Ptr (CustomStore private row))

-- | Extract a row of the given model at the given 'TreeIter'.
--
customStoreGetRow :: TypedTreeModelClass model => model row -> TreeIter -> IO row
customStoreGetRow model iter = 
  case toTypedTreeModel model of
    TypedTreeModel model -> do
      impl <- withForeignPtr model gtk2hs_store_get_impl >>= deRefStablePtr
      treeModelIfaceGetRow (customStoreIface impl) iter

-- this is a backwards compatability definition
treeModelGetRow :: TypedTreeModelClass model => model row -> TreeIter -> IO row
treeModelGetRow = customStoreGetRow

foreign import ccall unsafe "Gtk2HsStore.h gtk2hs_store_get_impl"
  gtk2hs_store_get_impl :: Ptr (TypedTreeModel row) -> IO (StablePtr (CustomStoreImplementation model row))

-- | Return the private data stored in this 'CustomStore'. The private data
--   is meant as a container for the data stored in this model.
customStoreGetPrivate :: CustomStore private row -> private
customStoreGetPrivate (CustomStore model) =
  unsafePerformIO $ -- this is safe because the priv member is set at
                    -- construction time and never modified after that
  withForeignPtr model gtk2hs_store_get_priv >>= deRefStablePtr

foreign import ccall unsafe "Gtk2HsStore.h gtk2hs_store_get_priv"
  gtk2hs_store_get_priv :: Ptr (CustomStore private row) -> IO (StablePtr private)

-- | Query the current value of the stamp that is used to create
--   'TreeIter' iterators. The stamp is compared each time a view
--   accesses this store. If the stamp doesn't match, a warning
--   is emitted. The stamp should be updated each time a the data
--   in the model changes. The rationale is that a view should never
--   use a stale 'TreeIter', i.e., one that refers to an old model.
--
customStoreGetStamp :: CustomStore private row -> IO CInt
customStoreGetStamp (CustomStore model) =
  withForeignPtr model gtk2hs_store_get_stamp

foreign import ccall unsafe "Gtk2HsStore.h gtk2hs_store_get_stamp"
  gtk2hs_store_get_stamp :: Ptr (CustomStore private row) -> IO CInt

-- | Create a new stamp. See 'customStoreGetStamp'.
--
customStoreInvalidateIters :: CustomStore private row -> IO ()
customStoreInvalidateIters (CustomStore model) =
  withForeignPtr model gtk2hs_store_increment_stamp

foreign import ccall unsafe "Gtk2HsStore.h gtk2hs_store_increment_stamp"
  gtk2hs_store_increment_stamp :: Ptr (CustomStore private row) -> IO ()

treeModelIfaceGetNColumns_static :: StablePtr (CustomStoreImplementation model row) -> IO CInt
treeModelIfaceGetNColumns_static storePtr = do
  store <- deRefStablePtr storePtr
  cmap <- readIORef (customStoreColumns store)
  return (fromIntegral (length cmap))

foreign export ccall "gtk2hs_store_get_n_columns_impl"
  treeModelIfaceGetNColumns_static :: StablePtr (CustomStoreImplementation model row) -> IO CInt

-- Get the 'GType' for a given 'ColumnAccess'.
caToGType :: ColumnAccess row -> GType
caToGType (CAInt _) = GConst.int
caToGType (CABool _) = GConst.bool
caToGType (CAString _) = GConst.string
caToGType (CAPixbuf _) = gdk_pixbuf_get_type
{-# LINE 314 "./Graphics/UI/Gtk/ModelView/CustomStore.chs" #-}
caToGType CAInvalid = GConst.int -- to avoid warnings of functions that iterate through all columns

treeModelIfaceGetColumnType_static :: StablePtr (CustomStoreImplementation model row) -> CInt -> IO GType
treeModelIfaceGetColumnType_static storePtr column = do
  store <- deRefStablePtr storePtr
  cols <- readIORef (customStoreColumns store)
  case drop (fromIntegral column) cols of
     [] -> return GConst.invalid
     (ca:_) -> return (caToGType ca)

foreign export ccall "gtk2hs_store_get_column_type_impl"
  treeModelIfaceGetColumnType_static :: StablePtr (CustomStoreImplementation model row) -> CInt -> IO GType


treeModelIfaceGetFlags_static :: StablePtr (CustomStoreImplementation model row) -> IO CInt
treeModelIfaceGetFlags_static storePtr = do
  store <- liftM customStoreIface $ deRefStablePtr storePtr
  liftM (fromIntegral . fromFlags) $ treeModelIfaceGetFlags store

foreign export ccall "gtk2hs_store_get_flags_impl"
  treeModelIfaceGetFlags_static :: StablePtr (CustomStoreImplementation model row) -> IO CInt


treeModelIfaceGetIter_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> Ptr NativeTreePath -> IO CInt
treeModelIfaceGetIter_static storePtr iterPtr pathPtr = do
  store <- liftM customStoreIface $ deRefStablePtr storePtr
  path <- peekTreePath pathPtr
  iter <- treeModelIfaceGetIter store path
  case iter of
    Nothing   -> return (fromBool False)
    Just iter -> do poke iterPtr iter
                    return (fromBool True)

foreign export ccall "gtk2hs_store_get_iter_impl"
  treeModelIfaceGetIter_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> Ptr NativeTreePath -> IO CInt

treeModelIfaceGetPath_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> IO (Ptr NativeTreePath)
treeModelIfaceGetPath_static storePtr iterPtr = do
  store <- liftM customStoreIface $ deRefStablePtr storePtr
  iter <- peek iterPtr
  path <- treeModelIfaceGetPath store iter
  NativeTreePath pathPtr <- newTreePath path
  return pathPtr

foreign export ccall "gtk2hs_store_get_path_impl"
  treeModelIfaceGetPath_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> IO (Ptr NativeTreePath)


treeModelIfaceGetValue_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> CInt -> Ptr GValue -> IO ()
treeModelIfaceGetValue_static storePtr iterPtr column gvaluePtr = do
  store <- deRefStablePtr storePtr
  iter <- peek iterPtr
  row <- treeModelIfaceGetRow (customStoreIface store) iter
  cols <- readIORef (customStoreColumns store)
  let gVal = (GValue gvaluePtr)
  0 <- (\ptr -> do {peekByteOff ptr 0 ::IO CULong}) gvaluePtr
  case drop (fromIntegral column) cols of
    [] -> valueInit gVal GConst.invalid -- column number out of range
    (acc:_) -> case acc of
      (CAInt ca) -> valueInit gVal GConst.int >> valueSetInt gVal (ca row)
      (CABool ca) -> valueInit gVal GConst.bool >> valueSetBool gVal (ca row)
      (CAString ca) -> valueInit gVal GConst.string >> valueSetString gVal (ca row)
      (CAPixbuf ca) -> valueInit gVal gdk_pixbuf_get_type >>
			valueSetGObject gVal (ca row)
      CAInvalid -> valueInit gVal GConst.int >> valueSetInt gVal 0
      
foreign export ccall "gtk2hs_store_get_value_impl"
  treeModelIfaceGetValue_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> CInt -> Ptr GValue -> IO ()


treeModelIfaceIterNext_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> IO CInt
treeModelIfaceIterNext_static storePtr iterPtr = do
  store <- liftM customStoreIface $ deRefStablePtr storePtr
  iter <- peek iterPtr
  iter' <- treeModelIfaceIterNext store iter
  case iter' of
    Nothing    -> return (fromBool False)
    Just iter' -> do poke iterPtr iter'
                     return (fromBool True)

foreign export ccall "gtk2hs_store_iter_next_impl"
  treeModelIfaceIterNext_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> IO CInt


treeModelIfaceIterChildren_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> Ptr TreeIter -> IO CInt
treeModelIfaceIterChildren_static storePtr iterPtr parentIterPtr = do
  store <- liftM customStoreIface $ deRefStablePtr storePtr
  parentIter <- maybeNull peek parentIterPtr
  iter <- treeModelIfaceIterChildren store parentIter
  case iter of
    Nothing   -> return (fromBool False)
    Just iter -> do poke iterPtr iter
                    return (fromBool True)

foreign export ccall "gtk2hs_store_iter_children_impl"
  treeModelIfaceIterChildren_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> Ptr TreeIter -> IO CInt


treeModelIfaceIterHasChild_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> IO CInt
treeModelIfaceIterHasChild_static storePtr iterPtr = do
  store <- liftM customStoreIface $ deRefStablePtr storePtr
  iter <- peek iterPtr
  liftM fromBool $ treeModelIfaceIterHasChild store iter

foreign export ccall "gtk2hs_store_iter_has_child_impl"
  treeModelIfaceIterHasChild_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> IO CInt


treeModelIfaceIterNChildren_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> IO CInt
treeModelIfaceIterNChildren_static storePtr iterPtr = do
  store <- liftM customStoreIface $ deRefStablePtr storePtr
  iter <- maybeNull peek iterPtr
  liftM fromIntegral $ treeModelIfaceIterNChildren store iter

foreign export ccall "gtk2hs_store_iter_n_children_impl"
  treeModelIfaceIterNChildren_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> IO CInt


treeModelIfaceIterNthChild_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> Ptr TreeIter -> CInt -> IO CInt
treeModelIfaceIterNthChild_static storePtr iterPtr parentIterPtr n = do
  store <- liftM customStoreIface $ deRefStablePtr storePtr
  parentIter <- maybeNull peek parentIterPtr
  iter <- treeModelIfaceIterNthChild store parentIter (fromIntegral n)
  case iter of
    Nothing   -> return (fromBool False)
    Just iter -> do poke iterPtr iter
                    return (fromBool True)

foreign export ccall "gtk2hs_store_iter_nth_child_impl"
  treeModelIfaceIterNthChild_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> Ptr TreeIter -> CInt -> IO CInt


treeModelIfaceIterParent_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> Ptr TreeIter -> IO CInt
treeModelIfaceIterParent_static  storePtr iterPtr childIterPtr = do
  store <- liftM customStoreIface $ deRefStablePtr storePtr
  childIter <- peek childIterPtr
  iter <- treeModelIfaceIterParent store childIter
  case iter of
    Nothing   -> return (fromBool False)
    Just iter -> do poke iterPtr iter
                    return (fromBool True)

foreign export ccall "gtk2hs_store_iter_parent_impl"
  treeModelIfaceIterParent_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> Ptr TreeIter -> IO CInt


treeModelIfaceRefNode_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> IO ()
treeModelIfaceRefNode_static storePtr iterPtr = do
  store <- liftM customStoreIface $ deRefStablePtr storePtr
  iter <- peek iterPtr
  treeModelIfaceRefNode store iter

foreign export ccall "gtk2hs_store_ref_node_impl"
  treeModelIfaceRefNode_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> IO ()


treeModelIfaceUnrefNode_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> IO ()
treeModelIfaceUnrefNode_static storePtr iterPtr = do
  store <- liftM customStoreIface $ deRefStablePtr storePtr
  iter <- peek iterPtr
  treeModelIfaceUnrefNode store iter

foreign export ccall "gtk2hs_store_unref_node_impl"
  treeModelIfaceUnrefNode_static :: StablePtr (CustomStoreImplementation model row) -> Ptr TreeIter -> IO ()

treeDragSourceRowDraggable_static :: Ptr TreeModel -> StablePtr (CustomStoreImplementation model row) -> Ptr NativeTreePath -> IO CInt
treeDragSourceRowDraggable_static mPtr storePtr pathPtr = do
  model <- makeNewGObject mkTreeModel (return mPtr)
  store <- liftM customTreeDragSourceIface $ deRefStablePtr storePtr
  path <- peekTreePath pathPtr
  liftM fromBool $ treeDragSourceRowDraggable store (unsafeTreeModelToGeneric model) path

foreign export ccall "gtk2hs_store_row_draggable_impl"
  treeDragSourceRowDraggable_static :: Ptr TreeModel -> StablePtr (CustomStoreImplementation model row) -> Ptr NativeTreePath -> IO CInt

treeDragSourceDragDataGet_static :: Ptr TreeModel -> StablePtr (CustomStoreImplementation model row) -> Ptr NativeTreePath -> SelectionData -> IO CInt
treeDragSourceDragDataGet_static mPtr storePtr pathPtr selectionPtr = do
  model <- makeNewGObject mkTreeModel (return mPtr)
  store <- liftM customTreeDragSourceIface $ deRefStablePtr storePtr
  path <- peekTreePath pathPtr
  liftM fromBool $ runReaderT (treeDragSourceDragDataGet store (unsafeTreeModelToGeneric model) path) selectionPtr

foreign export ccall "gtk2hs_store_drag_data_get_impl"
  treeDragSourceDragDataGet_static :: Ptr TreeModel -> StablePtr (CustomStoreImplementation model row) -> Ptr NativeTreePath -> SelectionData -> IO CInt

treeDragSourceDragDataDelete_static :: Ptr TreeModel -> StablePtr (CustomStoreImplementation model row) -> Ptr NativeTreePath -> IO CInt
treeDragSourceDragDataDelete_static mPtr storePtr pathPtr = do
  model <- makeNewGObject mkTreeModel (return mPtr)
  store <- liftM customTreeDragSourceIface $ deRefStablePtr storePtr
  path <- peekTreePath pathPtr
  liftM fromBool $ treeDragSourceDragDataDelete store (unsafeTreeModelToGeneric model) path

foreign export ccall "gtk2hs_store_drag_data_delete_impl"
  treeDragSourceDragDataDelete_static :: Ptr TreeModel -> StablePtr (CustomStoreImplementation model row) -> Ptr NativeTreePath -> IO CInt

treeDragDestDragDataReceived_static :: Ptr TreeModel -> StablePtr (CustomStoreImplementation model row) -> Ptr NativeTreePath -> SelectionData -> IO CInt
treeDragDestDragDataReceived_static mPtr storePtr pathPtr selectionPtr = do
  model <- makeNewGObject mkTreeModel (return mPtr)
  store <- liftM customTreeDragDestIface $ deRefStablePtr storePtr
  path <- peekTreePath pathPtr
  liftM fromBool $ runReaderT (treeDragDestDragDataReceived store (unsafeTreeModelToGeneric model) path) selectionPtr

foreign export ccall "gtk2hs_store_drag_data_received_impl"
  treeDragDestDragDataReceived_static :: Ptr TreeModel -> StablePtr (CustomStoreImplementation model row) -> Ptr NativeTreePath -> SelectionData -> IO CInt

treeDragDestRowDropPossible_static :: Ptr TreeModel -> StablePtr (CustomStoreImplementation model row) -> Ptr NativeTreePath -> SelectionData -> IO CInt
treeDragDestRowDropPossible_static mPtr storePtr pathPtr selectionPtr = do
  model <- makeNewGObject mkTreeModel (return mPtr)
  store <- liftM customTreeDragDestIface $ deRefStablePtr storePtr
  path <- peekTreePath pathPtr
  liftM fromBool $ runReaderT (treeDragDestRowDropPossible store (unsafeTreeModelToGeneric model) path) selectionPtr

foreign export ccall "gtk2hs_store_row_drop_possible_impl"
  treeDragDestRowDropPossible_static :: Ptr TreeModel -> StablePtr (CustomStoreImplementation model row) -> Ptr NativeTreePath -> SelectionData -> IO CInt

maybeNull :: (Ptr a -> IO b) -> Ptr a -> IO (Maybe b)
maybeNull marshal ptr
  | ptr == nullPtr = return Nothing
  | otherwise      = liftM Just (marshal ptr)

iterSetStamp :: CInt -> TreeIter -> TreeIter
iterSetStamp t (TreeIter _ a b c) = (TreeIter t a b c)


foreign import ccall unsafe "gdk_pixbuf_get_type"
  gdk_pixbuf_get_type :: CULong