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{
$Id: mouse.pas,v 1.5 1999/07/29 11:38:56 peter Exp $
Mouse unit, part of the portable API for Pascal
Copyright (c) 1997 Balazs Scheidler (bazsi@balabit.hu)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************}
unit Mouse;
interface
{$i platform.inc}
uses
Common;
const
{ We have an errorcode base of 1010 }
errMouseInitError = errMouseBase + 0;
errMouseNotImplemented = errMouseBase + 1;
type
PMouseEvent=^TMouseEvent;
TMouseEvent=packed record { 8 bytes }
buttons : word;
x,y : word;
Action : word;
end;
const
MouseActionDown = $0001; { Mouse down event }
MouseActionUp = $0002; { Mouse up event }
MouseActionMove = $0004; { Mouse move event }
MouseLeftButton = $01; { Left mouse button }
MouseRightButton = $02; { Right mouse button }
MouseMiddleButton = $04; { Middle mouse button }
{$ifdef OS_WINDOWS}
MouseEventBufSize = 255;
{$else OS_WINDOWS}
MouseEventBufSize = 16;
{$endif OS_WINDOWS}
var
PendingMouseEvent : array[0..MouseEventBufSize-1] of TMouseEvent;
PendingMouseHead,
PendingMouseTail : PMouseEvent;
PendingMouseEvents : byte;
LastMouseEvent : TMouseEvent;
MouseIntFlag : Byte; { Mouse in int flag }
MouseButtons : Byte; { Mouse button state }
MouseWhereX,
MouseWhereY : Word; { Mouse position }
procedure InitMouse;
{ Initialize the mouse interface }
procedure DoneMouse;
{ Deinitialize the mouse interface }
function DetectMouse:byte;
{ Detect if a mouse is present, returns the amount of buttons or 0
if no mouse is found }
procedure ShowMouse;
{ Show the mouse cursor }
procedure HideMouse;
{ Hide the mouse cursor }
function GetMouseX:word;
{ Return the current X position of the mouse }
function GetMouseY:word;
{ Return the current Y position of the mouse }
function GetMouseButtons:word;
{ Return the current button state of the mouse }
procedure SetMouseXY(x,y:word);
{ Place the mouse cursor on x,y }
procedure GetMouseEvent(var MouseEvent:TMouseEvent);
{ Returns the last Mouseevent, and waits for one if not available }
procedure PutMouseEvent(const MouseEvent: TMouseEvent);
{ Adds the given MouseEvent to the input queue. Please note that depending on
the implementation this can hold only one value (NO FIFOs etc) }
function PollMouseEvent(var MouseEvent: TMouseEvent):boolean;
{ Checks if a Mouseevent is available, and returns it if one is found. If no
event is pending, it returns 0 }
implementation
{ Include platform dependent routines }
{$i mouse.inc}
{ Platform independent routines }
{$IFNDEF OS2}
procedure PutMouseEvent(const MouseEvent: TMouseEvent);
begin
if PendingMouseEvents<MouseEventBufSize then
begin
PendingMouseTail^:=MouseEvent;
inc(PendingMouseTail);
if longint(PendingMouseTail)=longint(@PendingMouseEvent)+sizeof(PendingMouseEvent) then
PendingMouseTail:=@PendingMouseEvent;
{ why isn't this done here ?
so the win32 version do this by hand:
inc(PendingMouseEvents); }
end
else
end;
{$ENDIF}
end.
{
$Log: mouse.pas,v $
Revision 1.5 1999/07/29 11:38:56 peter
* fixed comment for tp7
Revision 1.4 1999/07/17 22:37:07 florian
* implemented mouse handling
Revision 1.3 1999/04/23 17:54:58 hajny
PutMouseEvent modified for support of two queues in OS/2
Revision 1.2 1998/12/11 00:13:17 peter
+ SetMouseXY
* use far for exitproc procedure
Revision 1.1 1998/12/04 12:48:24 peter
* moved some dirs
Revision 1.1 1998/10/28 00:02:07 peter
+ mouse
+ video.clearscreen, video.videobufsize
}
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