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Version:
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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 Win32
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
{$ifdef DEBUG}
uses
windows;
var
last_ir : Input_Record;
{$endif DEBUG}
{$i keybrdh.inc}
function KeyPressed:Boolean;
implementation
{ WARNING: Keyboard-Drivers (i.e. german) will only work under WinNT.
95 and 98 do not support keyboard-drivers other than us for win32
console-apps. So we always get the keys in us-keyboard layout
from Win9x.
}
uses
{$ifndef DEBUG}
Windows,
{$endif DEBUG}
Dos,
WinEvent;
{$i keyboard.inc}
const MaxQueueSize = 120;
FrenchKeyboard = $040C040C;
var
keyboardeventqueue : array[0..maxqueuesize] of TKeyEventRecord;
nextkeyevent,nextfreekeyevent : longint;
newKeyEvent : THandle; {sinaled if key is available}
lockVar : TCriticalSection; {for queue access}
lastShiftState : byte; {set by handler for PollShiftStateEvent}
altNumActive : boolean; {for alt+0..9}
altNumBuffer : string [3];
{ used for keyboard specific stuff }
KeyBoardLayout : HKL;
Inited : Boolean;
HasAltGr : Boolean = false;
function KeyPressed:Boolean;
begin
KeyPressed:=PollKeyEvent<>0;
end;
procedure incqueueindex(var l : longint);
begin
inc(l);
{ wrap around? }
if l>maxqueuesize then
l:=0;
end;
function keyEventsInQueue : boolean;
begin
keyEventsInQueue := (nextkeyevent <> nextfreekeyevent);
end;
function rightistruealt(dw:cardinal):boolean; // inline ?
// used to wrap checks for right alt/altgr.
begin
rightistruealt:=true;
if hasaltgr then
rightistruealt:=(dw and RIGHT_ALT_PRESSED)=0;
end;
{ gets or peeks the next key from the queue, does not wait for new keys }
function getKeyEventFromQueue (VAR t : TKeyEventRecord; Peek : boolean) : boolean;
begin
if not Inited then
begin
getKeyEventFromQueue := false;
exit;
end;
EnterCriticalSection (lockVar);
if keyEventsInQueue then
begin
t := keyboardeventqueue[nextkeyevent];
if not peek then incqueueindex (nextkeyevent);
getKeyEventFromQueue := true;
if not keyEventsInQueue then ResetEvent (newKeyEvent);
end else
begin
getKeyEventFromQueue := false;
ResetEvent (newKeyEvent);
end;
LeaveCriticalSection (lockVar);
end;
{ gets the next key from the queue, does wait for new keys }
function getKeyEventFromQueueWait (VAR t : TKeyEventRecord) : boolean;
begin
if not Inited then
begin
getKeyEventFromQueueWait := false;
exit;
end;
WaitForSingleObject (newKeyEvent, dword(INFINITE));
{ force that we read a keyevent }
while not(getKeyEventFromQueue (t, false)) do
Sleep(0);
getKeyEventFromQueueWait:=true;
end;
{ translate win32 shift-state to keyboard shift state }
function transShiftState (ControlKeyState : dword) : byte;
var b : byte;
begin
b := 0;
if ControlKeyState and SHIFT_PRESSED <> 0 then { win32 makes no difference between left and right shift }
b := b or kbShift;
if (ControlKeyState and LEFT_CTRL_PRESSED <> 0) or
(ControlKeyState and RIGHT_CTRL_PRESSED <> 0) then
b := b or kbCtrl;
if (ControlKeyState and LEFT_ALT_PRESSED <> 0) or
(ControlKeyState and RIGHT_ALT_PRESSED <> 0) then
b := b or kbAlt;
transShiftState := b;
end;
{ The event-Handler thread from the unit event will call us if a key-event
is available }
procedure HandleKeyboard(var ir:INPUT_RECORD);
var
i : longint;
c : word;
altc : char;
addThis: boolean;
begin
with ir.Event.KeyEvent do
begin
{ key up events are ignored (except alt) }
if bKeyDown then
begin
EnterCriticalSection (lockVar);
for i:=1 to wRepeatCount do
begin
addThis := true;
if (dwControlKeyState and LEFT_ALT_PRESSED <> 0) or
(dwControlKeyState and RIGHT_ALT_PRESSED <> 0) then {alt pressed}
if ((wVirtualKeyCode >= $60) and (wVirtualKeyCode <= $69)) or
((dwControlKeyState and ENHANCED_KEY = 0) and
(wVirtualKeyCode in [$C{VK_CLEAR generated by keypad 5},
$21 {VK_PRIOR (PgUp) 9},
$22 {VK_NEXT (PgDown) 3},
$23 {VK_END 1},
$24 {VK_HOME 7},
$25 {VK_LEFT 4},
$26 {VK_UP 8},
$27 {VK_RIGHT 6},
$28 {VK_DOWN 2},
$2D {VK_INSERT 0}])) then {0..9 on NumBlock}
begin
if length (altNumBuffer) = 3 then
delete (altNumBuffer,1,1);
case wVirtualKeyCode of
$60..$69 : altc:=char (wVirtualKeyCode-48);
$c : altc:='5';
$21 : altc:='9';
$22 : altc:='3';
$23 : altc:='1';
$24 : altc:='7';
$25 : altc:='4';
$26 : altc:='8';
$27 : altc:='6';
$28 : altc:='2';
$2D : altc:='0';
end;
altNumBuffer := altNumBuffer + altc;
altNumActive := true;
addThis := false;
end else
begin
altNumActive := false;
altNumBuffer := '';
end;
if addThis then
begin
keyboardeventqueue[nextfreekeyevent]:=
ir.Event.KeyEvent;
incqueueindex(nextfreekeyevent);
end;
end;
lastShiftState := transShiftState (dwControlKeyState); {save it for PollShiftStateEvent}
SetEvent (newKeyEvent); {event that a new key is available}
LeaveCriticalSection (lockVar);
end
else
begin
lastShiftState := transShiftState (dwControlKeyState); {save it for PollShiftStateEvent}
{for alt-number we have to look for alt-key release}
if altNumActive then
begin
if (wVirtualKeyCode = $12) then {alt-released}
begin
if altNumBuffer <> '' then {numbers with alt pressed?}
begin
Val (altNumBuffer, c, i);
if (i = 0) and (c <= 255) then {valid number?}
begin {add to queue}
fillchar (ir, sizeof (ir), 0);
bKeyDown := true;
AsciiChar := char (c);
{and add to queue}
EnterCriticalSection (lockVar);
keyboardeventqueue[nextfreekeyevent]:=ir.Event.KeyEvent;
incqueueindex(nextfreekeyevent);
SetEvent (newKeyEvent); {event that a new key is available}
LeaveCriticalSection (lockVar);
end;
end;
altNumActive := false; {clear alt-buffer}
altNumBuffer := '';
end;
end;
end;
end;
end;
procedure CheckAltGr;
var ahkl : HKL;
i : integer;
begin
HasAltGr:=false;
ahkl:=GetKeyboardLayout(0);
i:=$20;
while i<$100 do
begin
// <MSDN>
// For keyboard layouts that use the right-hand ALT key as ashift key
// (for example, the French keyboard layout), the shift state is
// represented by the value 6, because the right-hand ALT key is
// converted internally into CTRL+ALT.
// </MSDN>
if (HIBYTE(VkKeyScanEx(chr(i),ahkl))=6) then
begin
HasAltGr:=true;
break;
end;
inc(i);
end;
end;
procedure SysInitKeyboard;
begin
KeyBoardLayout:=GetKeyboardLayout(0);
lastShiftState := 0;
FlushConsoleInputBuffer(StdInputHandle);
newKeyEvent := CreateEvent (nil, // address of security attributes
true, // flag for manual-reset event
false, // flag for initial state
nil); // address of event-object name
if newKeyEvent = INVALID_HANDLE_VALUE then
begin
// what to do here ????
RunError (217);
end;
InitializeCriticalSection (lockVar);
altNumActive := false;
altNumBuffer := '';
nextkeyevent:=0;
nextfreekeyevent:=0;
checkaltgr;
SetKeyboardEventHandler (@HandleKeyboard);
Inited:=true;
end;
procedure SysDoneKeyboard;
begin
SetKeyboardEventHandler(nil); {hangs???}
DeleteCriticalSection (lockVar);
FlushConsoleInputBuffer(StdInputHandle);
closeHandle (newKeyEvent);
Inited:=false;
end;
{$define USEKEYCODES}
{Translatetable Win32 -> Dos for Special Keys = Function Key, Cursor Keys
and Keys other than numbers on numblock (to make fv happy) }
{combinations under dos: Shift+Ctrl: same as Ctrl
Shift+Alt : same as alt
Ctrl+Alt : nothing (here we get it like alt)}
{$ifdef USEKEYCODES}
{ use positive values for ScanCode we want to set
0 for key where we should leave the scancode
-1 for OEM specifc keys
-2 for unassigned
-3 for Kanji systems ???
}
const
Unassigned = -2;
Kanji = -3;
OEM_specific = -1;
KeyToQwertyScan : array [0..255] of integer =
(
{ 00 } 0,
{ 01 VK_LBUTTON } 0,
{ 02 VK_RBUTTON } 0,
{ 03 VK_CANCEL } 0,
{ 04 VK_MBUTTON } 0,
{ 05 unassigned } -2,
{ 06 unassigned } -2,
{ 07 unassigned } -2,
{ 08 VK_BACK } $E,
{ 09 VK_TAB } $F,
{ 0A unassigned } -2,
{ 0B unassigned } -2,
{ 0C VK_CLEAR ?? } 0,
{ 0D VK_RETURN } 0,
{ 0E unassigned } -2,
{ 0F unassigned } -2,
{ 10 VK_SHIFT } 0,
{ 11 VK_CONTROL } 0,
{ 12 VK_MENU (Alt key) } 0,
{ 13 VK_PAUSE } 0,
{ 14 VK_CAPITAL (Caps Lock) } 0,
{ 15 Reserved for Kanji systems} -3,
{ 16 Reserved for Kanji systems} -3,
{ 17 Reserved for Kanji systems} -3,
{ 18 Reserved for Kanji systems} -3,
{ 19 Reserved for Kanji systems} -3,
{ 1A unassigned } -2,
{ 1B VK_ESCAPE } $1,
{ 1C Reserved for Kanji systems} -3,
{ 1D Reserved for Kanji systems} -3,
{ 1E Reserved for Kanji systems} -3,
{ 1F Reserved for Kanji systems} -3,
{ 20 VK_SPACE} 0,
{ 21 VK_PRIOR (PgUp) } 0,
{ 22 VK_NEXT (PgDown) } 0,
{ 23 VK_END } 0,
{ 24 VK_HOME } 0,
{ 25 VK_LEFT } 0,
{ 26 VK_UP } 0,
{ 27 VK_RIGHT } 0,
{ 28 VK_DOWN } 0,
{ 29 VK_SELECT ??? } 0,
{ 2A OEM specific !! } -1,
{ 2B VK_EXECUTE } 0,
{ 2C VK_SNAPSHOT } 0,
{ 2D VK_INSERT } 0,
{ 2E VK_DELETE } 0,
{ 2F VK_HELP } 0,
{ 30 VK_0 '0' } 11,
{ 31 VK_1 '1' } 2,
{ 32 VK_2 '2' } 3,
{ 33 VK_3 '3' } 4,
{ 34 VK_4 '4' } 5,
{ 35 VK_5 '5' } 6,
{ 36 VK_6 '6' } 7,
{ 37 VK_7 '7' } 8,
{ 38 VK_8 '8' } 9,
{ 39 VK_9 '9' } 10,
{ 3A unassigned } -2,
{ 3B unassigned } -2,
{ 3C unassigned } -2,
{ 3D unassigned } -2,
{ 3E unassigned } -2,
{ 3F unassigned } -2,
{ 40 unassigned } -2,
{ 41 VK_A 'A' } $1E,
{ 42 VK_B 'B' } $30,
{ 43 VK_C 'C' } $2E,
{ 44 VK_D 'D' } $20,
{ 45 VK_E 'E' } $12,
{ 46 VK_F 'F' } $21,
{ 47 VK_G 'G' } $22,
{ 48 VK_H 'H' } $23,
{ 49 VK_I 'I' } $17,
{ 4A VK_J 'J' } $24,
{ 4B VK_K 'K' } $25,
{ 4C VK_L 'L' } $26,
{ 4D VK_M 'M' } $32,
{ 4E VK_N 'N' } $31,
{ 4F VK_O 'O' } $18,
{ 50 VK_P 'P' } $19,
{ 51 VK_Q 'Q' } $10,
{ 52 VK_R 'R' } $13,
{ 53 VK_S 'S' } $1F,
{ 54 VK_T 'T' } $14,
{ 55 VK_U 'U' } $16,
{ 56 VK_V 'V' } $2F,
{ 57 VK_W 'W' } $11,
{ 58 VK_X 'X' } $2D,
{ 59 VK_Y 'Y' } $15,
{ 5A VK_Z 'Z' } $2C,
{ 5B unassigned } -2,
{ 5C unassigned } -2,
{ 5D unassigned } -2,
{ 5E unassigned } -2,
{ 5F unassigned } -2,
{ 60 VK_NUMPAD0 NumKeyPad '0' } 11,
{ 61 VK_NUMPAD1 NumKeyPad '1' } 2,
{ 62 VK_NUMPAD2 NumKeyPad '2' } 3,
{ 63 VK_NUMPAD3 NumKeyPad '3' } 4,
{ 64 VK_NUMPAD4 NumKeyPad '4' } 5,
{ 65 VK_NUMPAD5 NumKeyPad '5' } 6,
{ 66 VK_NUMPAD6 NumKeyPad '6' } 7,
{ 67 VK_NUMPAD7 NumKeyPad '7' } 8,
{ 68 VK_NUMPAD8 NumKeyPad '8' } 9,
{ 69 VK_NUMPAD9 NumKeyPad '9' } 10,
{ 6A VK_MULTIPLY } 0,
{ 6B VK_ADD } 0,
{ 6C VK_SEPARATOR } 0,
{ 6D VK_SUBSTRACT } 0,
{ 6E VK_DECIMAL } 0,
{ 6F VK_DIVIDE } 0,
{ 70 VK_F1 'F1' } $3B,
{ 71 VK_F2 'F2' } $3C,
{ 72 VK_F3 'F3' } $3D,
{ 73 VK_F4 'F4' } $3E,
{ 74 VK_F5 'F5' } $3F,
{ 75 VK_F6 'F6' } $40,
{ 76 VK_F7 'F7' } $41,
{ 77 VK_F8 'F8' } $42,
{ 78 VK_F9 'F9' } $43,
{ 79 VK_F10 'F10' } $44,
{ 7A VK_F11 'F11' } $57,
{ 7B VK_F12 'F12' } $58,
{ 7C VK_F13 } 0,
{ 7D VK_F14 } 0,
{ 7E VK_F15 } 0,
{ 7F VK_F16 } 0,
{ 80 VK_F17 } 0,
{ 81 VK_F18 } 0,
{ 82 VK_F19 } 0,
{ 83 VK_F20 } 0,
{ 84 VK_F21 } 0,
{ 85 VK_F22 } 0,
{ 86 VK_F23 } 0,
{ 87 VK_F24 } 0,
{ 88 unassigned } -2,
{ 89 VK_NUMLOCK } 0,
{ 8A VK_SCROLL } 0,
{ 8B unassigned } -2,
{ 8C unassigned } -2,
{ 8D unassigned } -2,
{ 8E unassigned } -2,
{ 8F unassigned } -2,
{ 90 unassigned } -2,
{ 91 unassigned } -2,
{ 92 unassigned } -2,
{ 93 unassigned } -2,
{ 94 unassigned } -2,
{ 95 unassigned } -2,
{ 96 unassigned } -2,
{ 97 unassigned } -2,
{ 98 unassigned } -2,
{ 99 unassigned } -2,
{ 9A unassigned } -2,
{ 9B unassigned } -2,
{ 9C unassigned } -2,
{ 9D unassigned } -2,
{ 9E unassigned } -2,
{ 9F unassigned } -2,
{ A0 unassigned } -2,
{ A1 unassigned } -2,
{ A2 unassigned } -2,
{ A3 unassigned } -2,
{ A4 unassigned } -2,
{ A5 unassigned } -2,
{ A6 unassigned } -2,
{ A7 unassigned } -2,
{ A8 unassigned } -2,
{ A9 unassigned } -2,
{ AA unassigned } -2,
{ AB unassigned } -2,
{ AC unassigned } -2,
{ AD unassigned } -2,
{ AE unassigned } -2,
{ AF unassigned } -2,
{ B0 unassigned } -2,
{ B1 unassigned } -2,
{ B2 unassigned } -2,
{ B3 unassigned } -2,
{ B4 unassigned } -2,
{ B5 unassigned } -2,
{ B6 unassigned } -2,
{ B7 unassigned } -2,
{ B8 unassigned } -2,
{ B9 unassigned } -2,
{ BA OEM specific } 0,
{ BB OEM specific } 0,
{ BC OEM specific } 0,
{ BD OEM specific } 0,
{ BE OEM specific } 0,
{ BF OEM specific } 0,
{ C0 OEM specific } 0,
{ C1 unassigned } -2,
{ C2 unassigned } -2,
{ C3 unassigned } -2,
{ C4 unassigned } -2,
{ C5 unassigned } -2,
{ C6 unassigned } -2,
{ C7 unassigned } -2,
{ C8 unassigned } -2,
{ C9 unassigned } -2,
{ CA unassigned } -2,
{ CB unassigned } -2,
{ CC unassigned } -2,
{ CD unassigned } -2,
{ CE unassigned } -2,
{ CF unassigned } -2,
{ D0 unassigned } -2,
{ D1 unassigned } -2,
{ D2 unassigned } -2,
{ D3 unassigned } -2,
{ D4 unassigned } -2,
{ D5 unassigned } -2,
{ D6 unassigned } -2,
{ D7 unassigned } -2,
{ D8 unassigned } -2,
{ D9 unassigned } -2,
{ DA unassigned } -2,
{ DB OEM specific } 0,
{ DC OEM specific } 0,
{ DD OEM specific } 0,
{ DE OEM specific } 0,
{ DF OEM specific } 0,
{ E0 OEM specific } 0,
{ E1 OEM specific } 0,
{ E2 OEM specific } 0,
{ E3 OEM specific } 0,
{ E4 OEM specific } 0,
{ E5 unassigned } -2,
{ E6 OEM specific } 0,
{ E7 unassigned } -2,
{ E8 unassigned } -2,
{ E9 OEM specific } 0,
{ EA OEM specific } 0,
{ EB OEM specific } 0,
{ EC OEM specific } 0,
{ ED OEM specific } 0,
{ EE OEM specific } 0,
{ EF OEM specific } 0,
{ F0 OEM specific } 0,
{ F1 OEM specific } 0,
{ F2 OEM specific } 0,
{ F3 OEM specific } 0,
{ F4 OEM specific } 0,
{ F5 OEM specific } 0,
{ F6 unassigned } -2,
{ F7 unassigned } -2,
{ F8 unassigned } -2,
{ F9 unassigned } -2,
{ FA unassigned } -2,
{ FB unassigned } -2,
{ FC unassigned } -2,
{ FD unassigned } -2,
{ FE unassigned } -2,
{ FF unassigned } -2
);
{$endif USEKEYCODES}
type TTEntryT = packed record
n,s,c,a : byte; {normal,shift, ctrl, alt, normal only for f11,f12}
end;
CONST
DosTT : ARRAY [$3B..$58] OF TTEntryT =
((n : $3B; s : $54; c : $5E; a: $68), {3B F1}
(n : $3C; s : $55; c : $5F; a: $69), {3C F2}
(n : $3D; s : $56; c : $60; a: $6A), {3D F3}
(n : $3E; s : $57; c : $61; a: $6B), {3E F4}
(n : $3F; s : $58; c : $62; a: $6C), {3F F5}
(n : $40; s : $59; c : $63; a: $6D), {40 F6}
(n : $41; s : $5A; c : $64; a: $6E), {41 F7}
(n : $42; s : $5B; c : $65; a: $6F), {42 F8}
(n : $43; s : $5C; c : $66; a: $70), {43 F9}
(n : $44; s : $5D; c : $67; a: $71), {44 F10}
(n : $45; s : $00; c : $00; a: $00), {45 ???}
(n : $46; s : $00; c : $00; a: $00), {46 ???}
(n : $47; s : $47; c : $77; a: $97), {47 Home}
(n : $48; s : $00; c : $8D; a: $98), {48 Up}
(n : $49; s : $49; c : $84; a: $99), {49 PgUp}
(n : $4A; s : $00; c : $8E; a: $4A), {4A -}
(n : $4B; s : $4B; c : $73; a: $9B), {4B Left}
(n : $4C; s : $00; c : $00; a: $00), {4C ???}
(n : $4D; s : $4D; c : $74; a: $9D), {4D Right}
(n : $4E; s : $00; c : $90; a: $4E), {4E +}
(n : $4F; s : $4F; c : $75; a: $9F), {4F End}
(n : $50; s : $50; c : $91; a: $A0), {50 Down}
(n : $51; s : $51; c : $76; a: $A1), {51 PgDown}
(n : $52; s : $52; c : $92; a: $A2), {52 Insert}
(n : $53; s : $53; c : $93; a: $A3), {53 Del}
(n : $54; s : $00; c : $00; a: $00), {54 ???}
(n : $55; s : $00; c : $00; a: $00), {55 ???}
(n : $56; s : $00; c : $00; a: $00), {56 ???}
(n : $85; s : $87; c : $89; a: $8B), {57 F11}
(n : $86; s : $88; c : $8A; a: $8C)); {58 F12}
DosTT09 : ARRAY [$02..$0F] OF TTEntryT =
((n : $00; s : $00; c : $00; a: $78), {02 1 }
(n : $00; s : $00; c : $00; a: $79), {03 2 }
(n : $00; s : $00; c : $00; a: $7A), {04 3 }
(n : $00; s : $00; c : $00; a: $7B), {05 4 }
(n : $00; s : $00; c : $00; a: $7C), {06 5 }
(n : $00; s : $00; c : $00; a: $7D), {07 6 }
(n : $00; s : $00; c : $00; a: $7E), {08 7 }
(n : $00; s : $00; c : $00; a: $7F), {09 8 }
(n : $00; s : $00; c : $00; a: $80), {0A 9 }
(n : $00; s : $00; c : $00; a: $81), {0B 0 }
(n : $00; s : $00; c : $00; a: $82), {0C ß }
(n : $00; s : $00; c : $00; a: $00), {0D}
(n : $00; s : $09; c : $00; a: $00), {0E Backspace}
(n : $00; s : $0F; c : $94; a: $00)); {0F Tab }
function TranslateKey (t : TKeyEventRecord) : TKeyEvent;
var key : TKeyEvent;
ss : byte;
{$ifdef USEKEYCODES}
ScanCode : byte;
{$endif USEKEYCODES}
b : byte;
begin
Key := 0;
if t.bKeyDown then
begin
{ ascii-char is <> 0 if not a specal key }
{ we return it here otherwise we have to translate more later }
if t.AsciiChar <> #0 then
begin
if (t.dwControlKeyState and ENHANCED_KEY <> 0) and
(t.wVirtualKeyCode = $DF) then
begin
t.dwControlKeyState:=t.dwControlKeyState and not ENHANCED_KEY;
t.wVirtualKeyCode:=VK_DIVIDE;
t.AsciiChar:='/';
end;
{drivers needs scancode, we return it here as under dos and linux
with $03000000 = the lowest two bytes is the physical representation}
{$ifdef USEKEYCODES}
Scancode:=KeyToQwertyScan[t.wVirtualKeyCode AND $00FF];
If ScanCode>0 then
t.wVirtualScanCode:=ScanCode;
Key := byte (t.AsciiChar) + (t.wVirtualScanCode shl 8) + $03000000;
ss := transShiftState (t.dwControlKeyState);
key := key or (ss shl 16);
if (ss and kbAlt <> 0) and rightistruealt(t.dwControlKeyState) then
key := key and $FFFFFF00;
{$else not USEKEYCODES}
Key := byte (t.AsciiChar) + ((t.wVirtualScanCode AND $00FF) shl 8) + $03000000;
{$endif not USEKEYCODES}
end else
begin
{$ifdef USEKEYCODES}
Scancode:=KeyToQwertyScan[t.wVirtualKeyCode AND $00FF];
If ScanCode>0 then
t.wVirtualScanCode:=ScanCode;
{$endif not USEKEYCODES}
translateKey := 0;
{ ignore shift,ctrl,alt,numlock,capslock alone }
case t.wVirtualKeyCode of
$0010, {shift}
$0011, {ctrl}
$0012, {alt}
$0014, {capslock}
$0090, {numlock}
$0091, {scrollock}
{ This should be handled !! }
{ these last two are OEM specific
this is not good !!! }
$00DC, {^ : next key i.e. a is modified }
{ Strange on my keyboard this corresponds to double point over i or u PM }
$00DD: exit; {´ and ` : next key i.e. e is modified }
end;
key := $03000000 + (t.wVirtualScanCode shl 8); { make lower 8 bit=0 like under dos }
end;
{ Handling of ~ key as AltGr 2 }
{ This is also French keyboard specific !! }
{ but without this I can not get a ~ !! PM }
{ MvdV: not rightruealtised, since it already has frenchkbd guard}
if (t.wVirtualKeyCode=$32) and
(KeyBoardLayout = FrenchKeyboard) and
(t.dwControlKeyState and RIGHT_ALT_PRESSED <> 0) then
key:=(key and $ffffff00) or ord('~');
{ ok, now add Shift-State }
ss := transShiftState (t.dwControlKeyState);
key := key or (ss shl 16);
{ Reset Ascii-Char if Alt+Key, fv needs that, may be we
need it for other special keys too
18 Sept 1999 AD: not for right Alt i.e. for AltGr+ß = \ on german keyboard }
if ((ss and kbAlt <> 0) and rightistruealt(t.dwControlKeyState)) or
(*
{ yes, we need it for cursor keys, 25=left, 26=up, 27=right,28=down}
{aggg, this will not work because esc is also virtualKeyCode 27!!}
{if (t.wVirtualKeyCode >= 25) and (t.wVirtualKeyCode <= 28) then}
no VK_ESCAPE is $1B !!
there was a mistake :
VK_LEFT is $25 not 25 !! *)
{ not $2E VK_DELETE because its only the Keypad point !! PM }
(t.wVirtualKeyCode in [$21..$28,$2C,$2D,$2F]) then
{ if t.wVirtualScanCode in [$47..$49,$4b,$4d,$4f,$50..$53] then}
key := key and $FFFFFF00;
{and translate to dos-scancodes to make fv happy, we will convert this
back in translateKeyEvent}
if rightistruealt(t.dwControlKeyState) then {not for alt-gr}
if (t.wVirtualScanCode >= low (DosTT)) and
(t.wVirtualScanCode <= high (dosTT)) then
begin
b := 0;
if (ss and kbAlt) <> 0 then
b := DosTT[t.wVirtualScanCode].a
else
if (ss and kbCtrl) <> 0 then
b := DosTT[t.wVirtualScanCode].c
else
if (ss and kbShift) <> 0 then
b := DosTT[t.wVirtualScanCode].s
else
b := DosTT[t.wVirtualScanCode].n;
if b <> 0 then
key := (key and $FFFF00FF) or (cardinal (b) shl 8);
end;
{Alt-0 to Alt-9}
if rightistruealt(t.dwControlKeyState) then {not for alt-gr}
if (t.wVirtualScanCode >= low (DosTT09)) and
(t.wVirtualScanCode <= high (dosTT09)) then
begin
b := 0;
if (ss and kbAlt) <> 0 then
b := DosTT09[t.wVirtualScanCode].a
else
if (ss and kbCtrl) <> 0 then
b := DosTT09[t.wVirtualScanCode].c
else
if (ss and kbShift) <> 0 then
b := DosTT09[t.wVirtualScanCode].s
else
b := DosTT09[t.wVirtualScanCode].n;
if b <> 0 then
key := (key and $FFFF0000) or (cardinal (b) shl 8);
end;
TranslateKey := key;
end;
translateKey := Key;
end;
function SysGetKeyEvent: TKeyEvent;
var t : TKeyEventRecord;
key : TKeyEvent;
begin
key := 0;
repeat
if getKeyEventFromQueueWait (t) then
key := translateKey (t);
until key <> 0;
{$ifdef DEBUG}
last_ir.Event.KeyEvent:=t;
{$endif DEBUG}
SysGetKeyEvent := key;
end;
function SysPollKeyEvent: TKeyEvent;
var t : TKeyEventRecord;
k : TKeyEvent;
begin
SysPollKeyEvent := 0;
if getKeyEventFromQueue (t, true) then
begin
{ we get an enty for shift, ctrl, alt... }
k := translateKey (t);
while (k = 0) do
begin
getKeyEventFromQueue (t, false); {remove it}
if not getKeyEventFromQueue (t, true) then exit;
k := translateKey (t)
end;
SysPollKeyEvent := k;
end;
end;
function SysTranslateKeyEvent(KeyEvent: TKeyEvent): TKeyEvent;
begin
if KeyEvent and $03000000 = $03000000 then
begin
if KeyEvent and $000000FF <> 0 then
begin
SysTranslateKeyEvent := KeyEvent and $00FFFFFF;
exit;
end;
{translate function-keys and other specials, ascii-codes are already ok}
case (KeyEvent AND $0000FF00) shr 8 of
{F1..F10}
$3B..$44 : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdF1 + ((KeyEvent AND $0000FF00) SHR 8) - $3B + $02000000;
{F11,F12}
$85..$86 : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdF11 + ((KeyEvent AND $0000FF00) SHR 8) - $85 + $02000000;
{Shift F1..F10}
$54..$5D : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdF1 + ((KeyEvent AND $0000FF00) SHR 8) - $54 + $02000000;
{Shift F11,F12}
$87..$88 : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdF11 + ((KeyEvent AND $0000FF00) SHR 8) - $87 + $02000000;
{Alt F1..F10}
$68..$71 : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdF1 + ((KeyEvent AND $0000FF00) SHR 8) - $68 + $02000000;
{Alt F11,F12}
$8B..$8C : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdF11 + ((KeyEvent AND $0000FF00) SHR 8) - $8B + $02000000;
{Ctrl F1..F10}
$5E..$67 : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdF1 + ((KeyEvent AND $0000FF00) SHR 8) - $5E + $02000000;
{Ctrl F11,F12}
$89..$8A : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdF11 + ((KeyEvent AND $0000FF00) SHR 8) - $89 + $02000000;
{normal,ctrl,alt}
$47,$77,$97 : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdHome + $02000000;
$48,$8D,$98 : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdUp + $02000000;
$49,$84,$99 : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdPgUp + $02000000;
$4b,$73,$9B : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdLeft + $02000000;
$4d,$74,$9D : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdRight + $02000000;
$4f,$75,$9F : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdEnd + $02000000;
$50,$91,$A0 : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdDown + $02000000;
$51,$76,$A1 : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdPgDn + $02000000;
$52,$92,$A2 : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdInsert + $02000000;
$53,$93,$A3 : SysTranslateKeyEvent := (KeyEvent AND $FCFF0000) + kbdDelete + $02000000;
else
SysTranslateKeyEvent := KeyEvent;
end;
end else
SysTranslateKeyEvent := KeyEvent;
end;
function SysGetShiftState: Byte;
begin
{may be better to save the last state and return that if no key is in buffer???}
SysGetShiftState:= lastShiftState;
end;
Const
SysKeyboardDriver : TKeyboardDriver = (
InitDriver : @SysInitKeyBoard;
DoneDriver : @SysDoneKeyBoard;
GetKeyevent : @SysGetKeyEvent;
PollKeyEvent : @SysPollKeyEvent;
GetShiftState : @SysGetShiftState;
TranslateKeyEvent : @SysTranslateKeyEvent;
TranslateKeyEventUnicode : Nil;
);
begin
SetKeyBoardDriver(SysKeyBoardDriver);
end.