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{
This file is part of the Free Pascal run time library.
A file in Amiga system run time library.
Copyright (c) 1998-2002 by Nils Sjoholm
member of the Amiga RTL development team.
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.
**********************************************************************}
{
DeadKeyConvert
When you want Intuition to send you keystrokes, you either get just
the simple key-cap type keys (i.e. no cursor or function keys) or you
get keycodes, which tell you nothing about what was on the key the
user pressed. DeadKeyConvert allows you to receive RAWKEY messages,
then translate them into their ANSI key sequences. These are known as
cooked keys, and a single keystroke might be converted into as many as
four characters (including the CSI). See the ROM Kernel Manual and the
Enhancer manual for details.
The difference between this and RawKeyConvert is that this also
handles the deadkeys - for example, pressing ALT-K, releasing it, and
pressing o gives you an o with an umlaut.
Also note that some keys will come back with a length of zero - the
shift and alt keys, for example. You can probably ignore them.
Finally, I'll point out that, since this function calls RawKeyConvert,
you need to call OpenConsoleDevice (defined in ConsoleUtils) before using
it.
}
{
History:
A translation of DeadKeyConvert.p from PCQ Pascal.
26 Aug 2000.
nils.sjoholm@mailbox.swipnet.se
}
unit deadkeys;
interface
uses exec,intuition,console,inputevent;
function DeadKeyConvert(msg : pIntuiMessage; buffer : pchar;
bufsize : longint; keymap : pointer): longint;
implementation
function DeadKeyConvert(msg : pIntuiMessage; buffer : pchar;
bufsize : longint; keymap : pointer): longint;
var
theevent : tInputEvent;
Temp : ^pointer;
begin
if msg^.IClass <> IDCMP_RAWKEY then
DeadKeyConvert := -2;
with theevent do begin
ie_NextEvent := nil;
ie_Class := IECLASS_RAWKEY;
ie_SubClass := 0;
ie_Code := msg^.Code;
ie_Qualifier := msg^.Qualifier;
Temp := msg^.IAddress;
ie_position.ie_addr := Temp^;
end;
DeadKeyConvert := RawKeyConvert(Addr(theevent),buffer,bufsize,keymap);
end;
var
my_exit : pointer;
ConsoleRequest : tIOStdReq;
procedure CloseConsoleDevice;
begin
CloseDevice(Addr(ConsoleRequest));
end;
begin
ConsoleDevice := nil;
OpenDevice(pchar('console.device'#0),-1,Addr(ConsoleRequest),0);
ConsoleDevice := ConsoleRequest.io_Device;
my_exit := ExitProc;
ExitProc := @CloseConsoleDevice;
end.
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