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(*
Copyright (c) 2001, 2015
David C.J. Matthews
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License version 2.1 as published by the Free Software Foundation.
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.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*)
structure ScrollBase =
struct
local
open Foreign Base
in
type enableArrows = { enableLeftUp: bool, enableRightDown: bool }
val ESB_ENABLE_BOTH = { enableLeftUp = true, enableRightDown = true }
val ESB_DISABLE_BOTH = { enableLeftUp = false, enableRightDown = false }
val ESB_DISABLE_LEFT = { enableLeftUp = false, enableRightDown = true }
val ESB_DISABLE_RIGHT = { enableLeftUp = true, enableRightDown = false }
val ESB_DISABLE_UP = ESB_DISABLE_LEFT
val ESB_DISABLE_DOWN = ESB_DISABLE_RIGHT
local
(* The arrows are disabled if the bit is set. *)
fun toInt({enableLeftUp: bool, enableRightDown}: enableArrows) =
IntInf.orb(if enableLeftUp then 0 else 1,
if enableRightDown then 0 else 2)
and fromInt i : enableArrows =
{enableLeftUp = IntInf.andb(i, 1) = 0,
enableRightDown = IntInf.andb(i, 2) = 0}
in
(* It's easier to use the functions directly for messages *)
val ENABLESCROLLBARFLAG = (toInt, fromInt)
val cENABLESCROLLBARFLAG = absConversion{rep = toInt, abs = fromInt} cUint
end
type SCROLLINFO =
{ minPos: int, maxPos: int, pageSize: int, pos: int, trackPos: int }
datatype ScrollInfoOption =
SIF_RANGE | SIF_PAGE | SIF_POS | SIF_DISABLENOSCROLL | SIF_TRACKPOS
val SIF_ALL = [SIF_RANGE, SIF_PAGE, SIF_POS, SIF_TRACKPOS]
local
val tab = [
(SIF_RANGE, 0wx0001),
(SIF_PAGE, 0wx0002),
(SIF_POS, 0wx0004),
(SIF_DISABLENOSCROLL, 0wx0008),
(SIF_TRACKPOS, 0wx0010)]
in
(*val (fromSIF, toSIF) = tableSetLookup(tab, NONE)*)
val cSCROLLINFOOPTION = tableSetConversion(tab, NONE)
end
(* Needed in Scrollbar and also Messages *)
val cSCROLLINFOSTRUCT =
cStruct7(cUint, cSCROLLINFOOPTION, cInt, cInt, cUint, cInt, cInt)
end
end;
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