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417 lines
11 KiB
ObjectPascal
417 lines
11 KiB
ObjectPascal
{
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$Id$
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This file is part of the Free Pascal run time library.
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Copyright (c) 1999-2000 by Florian Klaempfl
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member of the Free Pascal development team
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Mouse unit for linux
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See the file COPYING.FPC, included in this distribution,
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for details about the copyright.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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**********************************************************************}
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unit Mouse;
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interface
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{$i mouseh.inc}
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implementation
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uses
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Video,
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MouCalls, DosCalls;
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{$i mouse.inc}
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var
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PendingMouseEventOrder: array [0..MouseEventBufSize-1] of cardinal;
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MouseEventOrderHead, MouseEventOrderTail: cardinal;
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const
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NoMouse = $FFFF;
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DefaultMouse = 0;
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Handle: word = DefaultMouse;
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HideCounter: cardinal = 0;
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OldEventMask: longint = -1;
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procedure SysInitMouse;
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var
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Loc: TPtrLoc;
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SetPrev: boolean;
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SysEvent: TMouEventInfo;
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QI: TMouQueInfo;
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W: word;
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begin
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SetPrev := MouGetPtrPos (Loc, DefaultMouse) = 0;
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if MouGetEventMask (W, DefaultMouse) = 0 then OldEventMask := W;
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MouseEventOrderTail := 0;
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MouseEventOrderHead := 0;
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HideCounter := 0;
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if MouOpen (nil, Handle) = Error_Mouse_No_Device then Handle := NoMouse else
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begin
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W := Mou_NoWait;
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repeat
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MouGetNumQueEl (QI, Handle);
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if QI.cEvents <> 0 then MouReadEventQue (SysEvent, W, Handle);
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until QI.cEvents = 0;
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W := $FFFF;
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MouSetEventMask (W, Handle);
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if SetPrev then MouSetPtrPos (Loc, Handle);
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(*
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It would be possible to issue a MouRegister call here to hook our own mouse
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handler, but such handler would have to be in a DLL and it is questionable,
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whether there would be so many advantages in doing so.
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*)
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MouDrawPtr (Handle);
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end;
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end;
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procedure SysDoneMouse;
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var
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W: word;
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begin
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if (Handle <> NoMouse) and (Handle <> DefaultMouse) then
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begin
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(*
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If our own mouse handler would be installed in InitMouse, MouDeregister would
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have appeared here.
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*)
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HideCounter := 0;
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HideMouse;
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MouClose (Handle);
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end;
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if OldEventMask <> -1 then
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begin
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W := OldEventMask;
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MouSetEventMask (W, 0);
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end;
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end;
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function SysDetectMouse:byte;
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var
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Buttons: word;
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RC: longint;
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TempHandle: word;
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begin
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MouOpen (nil, TempHandle);
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if MouGetNumButtons (Buttons, TempHandle) = 0 then
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SysDetectMouse := Buttons
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else
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SysDetectMouse := 0;
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MouClose (TempHandle);
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end;
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procedure SysShowMouse;
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begin
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if Handle <> NoMouse then
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begin
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if HideCounter <> 0 then
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begin
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Dec (HideCounter);
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if HideCounter = 0 then MouDrawPtr (Handle);
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end;
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end;
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end;
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procedure SysHideMouse;
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var
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PtrRect: TNoPtrRect;
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begin
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if Handle <> NoMouse then
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begin
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Inc (HideCounter);
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case HideCounter of
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0: Dec (HideCounter); (* HideCounter overflowed - stay at the maximum *)
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1: begin
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PtrRect.Row := 0;
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PtrRect.Col := 0;
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PtrRect.cRow := Pred (ScreenHeight);
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PtrRect.cCol := Pred (ScreenWidth);
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MouRemovePtr (PtrRect, Handle);
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end;
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end;
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end;
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end;
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function SysGetMouseX: word;
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var
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Event: TMouseEvent;
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begin
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if Handle = NoMouse then
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SysGetMouseX := 0
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else
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begin
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PollMouseEvent (Event);
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SysGetMouseX := Event.X;
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end;
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end;
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function SysGetMouseY: word;
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var
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Event: TMouseEvent;
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begin
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if Handle = NoMouse then
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SysGetMouseY := 0
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else
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begin
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PollMouseEvent (Event);
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SysGetMouseY := Event.Y;
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end;
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end;
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procedure SysGetMouseXY (var X: word; var Y: word);
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var
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Loc: TPtrLoc;
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begin
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if Handle = NoMouse then
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begin
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X := 0;
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Y := 0;
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end else if MouGetPtrPos (Loc, Handle) <> 0 then
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begin
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X := $FFFF;
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Y := $FFFF;
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end else
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begin
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X := Loc.Col;
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Y := Loc.Row;
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end;
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end;
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procedure SysSetMouseXY (X, Y: word);
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var
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Loc: TPtrLoc;
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begin
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if Handle <> NoMouse then
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begin
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Loc.Row := Y;
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Loc.Col := X;
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MouSetPtrPos (Loc, Handle);
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end;
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end;
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procedure TranslateEvents (const SysEvent: TMouEventInfo;
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var Event: TMouseEvent);
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begin
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Event.Buttons := 0;
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Event.Action := 0;
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if SysEvent.fs and (Mouse_Motion_With_BN1_Down or Mouse_BN1_Down) <> 0 then
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Event.Buttons := Event.Buttons or MouseLeftButton;
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if SysEvent.fs and (Mouse_Motion_With_BN2_Down or Mouse_BN2_Down) <> 0 then
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Event.Buttons := Event.Buttons or MouseRightButton;
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if SysEvent.fs and (Mouse_Motion_With_BN3_Down or Mouse_BN3_Down) <> 0 then
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Event.Buttons := Event.Buttons or MouseMiddleButton;
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Event.X := SysEvent.Col;
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Event.Y := SysEvent.Row;
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if Event.Buttons <> LastMouseEvent.Buttons then
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if (Event.Buttons and MouseLeftButton = 0) and
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(LastMouseEvent.Buttons and MouseLeftButton = MouseLeftButton)
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then Event.Action := MouseActionUp else
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if (Event.Buttons and MouseRightButton = 0) and
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(LastMouseEvent.Buttons and MouseRightButton = MouseRightButton)
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then Event.Action := MouseActionUp else
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if (Event.Buttons and MouseMiddleButton = 0) and
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(LastMouseEvent.Buttons and MouseMiddleButton = MouseMiddleButton)
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then Event.Action := MouseActionUp
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else Event.Action := MouseActionDown
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else if (Event.X <> LastMouseEvent.X) or (Event.Y <> LastMouseEvent.Y)
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then Event.Action := MouseActionMove;
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LastMouseEvent := Event;
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end;
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procedure NullOrder;
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var
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I: cardinal;
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begin
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if PendingMouseEvents > 0 then
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begin
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I := MouseEventOrderHead;
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repeat
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PendingMouseEventOrder [I] := 0;
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if I = Pred (MouseEventBufSize) then I := 0 else Inc (I);
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until (I <> MouseEventOrderTail);
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end;
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end;
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procedure LowerOrder;
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var
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I: cardinal;
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begin
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if PendingMouseEvents > 0 then
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begin
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I := MouseEventOrderHead;
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repeat
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if PendingMouseEventOrder [I] <> 0 then
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begin
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Dec (PendingMouseEventOrder [I]);
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if I = Pred (MouseEventBufSize) then I := 0 else Inc (I);
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end;
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until (I <> MouseEventOrderTail) or (PendingMouseEventOrder [I] = 0);
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end;
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end;
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function SysPollMouseEvent (var MouseEvent: TMouseEvent) :boolean;
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var
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SysEvent: TMouEventInfo;
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P, Q: PMouseEvent;
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Event: TMouseEvent;
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WF: word;
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QI: TMouQueInfo;
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begin
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if (PendingMouseEvents = 0) or
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(PendingMouseEventOrder [MouseEventOrderHead] <> 0) and
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(PendingMouseEvents < MouseEventBufSize) then
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begin
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MouGetNumQueEl (QI, Handle);
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if QI.cEvents = 0 then NullOrder else
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begin
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LowerOrder;
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WF := Mou_NoWait;
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if (MouReadEventQue (SysEvent, WF, Handle) = 0) then
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begin
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if PendingMouseHead = @PendingMouseEvent then
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P := @PendingMouseEvent [MouseEventBufSize - 1] else
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begin
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P := PendingMouseHead;
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Dec (P);
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end;
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TranslateEvents (SysEvent, P^);
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if P^.Action <> 0 then
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begin
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if PendingMouseEvents < MouseEventBufSize then
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begin
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Q := P;
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WF := Mou_NoWait;
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while (P^.Action = MouseActionMove) and
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(PendingMouseEventOrder [MouseEventOrderHead] <> 0) and
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(MouReadEventQue (SysEvent, WF, Handle) = 0) and
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((SysEvent.fs <> 0) or (LastMouseEvent.Buttons <> 0)) do
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begin
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LowerOrder;
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TranslateEvents (SysEvent, Event);
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if Event.Action <> MouseActionMove then
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begin
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if Q = @PendingMouseEvent then
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Q := @PendingMouseEvent [MouseEventBufSize - 1] else Dec (Q);
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if MouseEventOrderHead = 0 then
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MouseEventOrderHead := MouseEventBufSize - 1 else
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Dec (MouseEventOrderHead);
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PendingMouseEventOrder [MouseEventOrderHead] := 0;
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Q^ := P^;
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Inc (PendingMouseEvents);
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if MouseEventOrderHead = 0 then
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MouseEventOrderHead := MouseEventBufSize - 1 else
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Dec (MouseEventOrderHead);
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PendingMouseEventOrder [MouseEventOrderHead] := 0;
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end else WF := Mou_NoWait;
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P^ := Event;
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end;
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P := Q;
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end;
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Inc (PendingMouseEvents);
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if MouseEventOrderHead = 0 then
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MouseEventOrderHead := MouseEventBufSize - 1 else
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Dec (MouseEventOrderHead);
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PendingMouseEventOrder [MouseEventOrderHead] := 0;
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PendingMouseHead := P;
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end;
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end else NullOrder;
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end;
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end;
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if PendingMouseEvents <> 0 then
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begin
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MouseEvent := PendingMouseHead^;
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LastMouseEvent := MouseEvent;
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SysPollMouseEvent := true;
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end else
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begin
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SysPollMouseEvent := false;
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MouseEvent := LastMouseEvent;
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MouseEvent.Action := 0;
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end;
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end;
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function SysGetMouseButtons: word;
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var
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Event: TMouseEvent;
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begin
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PollMouseEvent (Event);
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SysGetMouseButtons := Event.Buttons;
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end;
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procedure SysGetMouseEvent (var MouseEvent: TMouseEvent);
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var
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Event: TMouEventInfo;
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begin
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if (PendingMouseEvents = 0) or
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(PendingMouseEventOrder [MouseEventOrderHead] <> 0) then
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repeat
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DosSleep (1);
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PollMouseEvent (MouseEvent);
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until (PendingMouseEvents <> 0) and
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(PendingMouseEventOrder [MouseEventOrderHead] = 0) else
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begin
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MouseEvent := PendingMouseHead^;
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LastMouseEvent := MouseEvent;
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end;
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Inc (PendingMouseHead);
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if longint (PendingMouseHead) = longint (@PendingMouseEvent)
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+ SizeOf (PendingMouseEvent) then PendingMouseHead := @PendingMouseEvent;
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Inc (MouseEventOrderHead);
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if MouseEventOrderHead = MouseEventBufSize then MouseEventOrderHead := 0;
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Dec (PendingMouseEvents);
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end;
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procedure SysPutMouseEvent (const MouseEvent: TMouseEvent);
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var
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QI: TMouQueInfo;
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begin
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if PendingMouseEvents < MouseEventBufSize then
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begin
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PendingMouseTail^ := MouseEvent;
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Inc (PendingMouseTail);
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if longint (PendingMouseTail) = longint (@PendingMouseEvent) +
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SizeOf (PendingMouseEvent) then PendingMouseTail := @PendingMouseEvent;
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MouGetNumQueEl (QI, Handle);
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PendingMouseEventOrder [MouseEventOrderTail] := QI.cEvents;
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Inc (MouseEventOrderTail);
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if MouseEventOrderTail = MouseEventBufSize then MouseEventOrderTail := 0;
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Inc (PendingMouseEvents);
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end;
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end;
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Const
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SysMouseDriver : TMouseDriver = (
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UseDefaultQueue : False;
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InitDriver : @SysInitMouse;
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DoneDriver : @SysDoneMouse;
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DetectMouse : @SysDetectMouse;
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ShowMouse : @SysShowMouse;
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HideMouse : @SysHideMouse;
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GetMouseX : @SysGetMouseX;
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GetMouseY : @SysGetMouseY;
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GetMouseButtons : @SysGetMouseButtons;
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SetMouseXY : @SysSetMouseXY;
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GetMouseEvent : @SysGetMouseEvent;
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PollMouseEvent : @SysPollMouseEvent;
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PutMouseEvent : @SysPutMouseEvent;
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);
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Begin
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SetMouseDriver(SysMouseDriver);
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end.
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{
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$Log$
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Revision 1.3 2002-09-07 16:01:24 peter
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* old logs removed and tabs fixed
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}
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