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{
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 by Florian Klaempfl
member of the Free Pascal development team
Keyboard unit for OS/2
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program 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.
**********************************************************************}
unit Keyboard;
interface
{$i keybrdh.inc}
implementation
uses
KbdCalls, DosCalls;
{$i keyboard.inc}
const
DefaultKeyboard = 0;
Handle: word = DefaultKeyboard;
procedure SysInitKeyboard;
var
K: TKbdInfo;
begin
if KbdGetFocus (IO_Wait, DefaultKeyboard) = No_Error then
begin
if KbdOpen (Handle) <> No_Error then
Handle := DefaultKeyboard;
KbdFlushBuffer (Handle);
KbdFreeFocus (DefaultKeyboard);
KbdGetFocus (IO_Wait, Handle);
K.cb := SizeOf (K);
KbdGetStatus (K, Handle);
K.fsMask := $14;
KbdSetStatus (K, Handle);
end;
end;
procedure SysDoneKeyboard;
begin
KbdFreeFocus (Handle);
if KbdGetFocus (IO_Wait, DefaultKeyboard) = No_Error then
begin
KbdClose (Handle);
Handle := DefaultKeyboard;
KbdFreeFocus (DefaultKeyboard);
end;
end;
function SysGetKeyEvent: TKeyEvent;
var
K: TKbdKeyInfo;
begin
KbdGetFocus (IO_Wait, Handle);
while (KbdCharIn (K, IO_NoWait, Handle) <> No_Error)
or (K.fbStatus and $41 <> $40) do
DosSleep (5);
with K do
begin
if (byte (chChar) = $E0) and (fbStatus and 2 <> 0) then chChar := #0;
SysGetKeyEvent := cardinal ($0300 or fsState and $F) shl 16 or
cardinal (byte (chScan)) shl 8 or byte (chChar);
end;
end;
function SysPollKeyEvent: TKeyEvent;
var
K: TKbdKeyInfo;
Key : TKeyEvent;
begin
Key:=0;
KbdGetFocus (IO_NoWait, Handle);
if (KbdPeek (K, Handle) <> No_Error) or
(K.fbStatus and $40 = 0) then
FillChar (K, SizeOf (K), 0)
else
with K do
begin
if (byte (chChar) = $E0) and (fbStatus and 2 <> 0) then
chChar := #0;
Key:= cardinal ($0300 or fsState and $F) shl 16 or
cardinal (byte (chScan)) shl 8 or byte (chChar);
end;
if (Key and $FFFF)=0 then
Key := 0;
SysPollKeyEvent:=Key;
end;
function SysGetShiftState: Byte;
var
K: TKbdInfo;
begin
KbdGetFocus (IO_NoWait, Handle);
K.cb := SizeOf (K);
if KbdGetStatus (K, Handle) = No_Error then
SysGetShiftState := (K.fsState and $F)
else
SysGetShiftState := 0;
end;
Const
SysKeyboardDriver : TKeyboardDriver = (
InitDriver : @SysInitKeyBoard;
DoneDriver : @SysDoneKeyBoard;
GetKeyevent : @SysGetKeyEvent;
PollKeyEvent : @SysPollKeyEvent;
GetShiftState : @SysGetShiftState;
TranslateKeyEvent : Nil;
TranslateKeyEventUnicode : Nil;
);
begin
SetKeyBoardDriver(SysKeyBoardDriver);
SetKbdCtrlBreakHandler;
end.
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