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{
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 by the Free Pascal 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.
**********************************************************************}
{$T+}
Var
CurrentMouseDriver : TMouseDriver;
MouseInitialized : Boolean;
// Mouse queue event mechanism
PendingMouseEvent : array[0..MouseEventBufSize-1] of TMouseEvent;
PendingMouseHead,
PendingMouseTail : PMouseEvent;
PendingMouseEvents : byte;
LastMouseEvent : TMouseEvent;
Procedure ClearMouseEventQueue;
begin
PendingMouseHead:=@PendingMouseEvent[0];
PendingMouseTail:=@PendingMouseEvent[0];
PendingMouseEvents:=0;
FillChar(LastMouseEvent,sizeof(TMouseEvent),0);
end;
procedure InitMouse;
begin
If Not MouseInitialized then
begin
If Assigned(CurrentMouseDriver.InitDriver) Then
CurrentMouseDriver.InitDriver();
ClearMouseEventQueue;
MouseInitialized:=True;
end;
end;
procedure DoneMouse;
begin
If MouseInitialized then
begin
If Assigned(CurrentMouseDriver.DoneDriver) Then
CurrentMouseDriver.DoneDriver();
ClearMouseEventQueue;
MouseInitialized:=False;
end;
end;
function DetectMouse:byte;
begin
If Assigned(CurrentMouseDriver.DetectMouse) Then
DetectMouse:=CurrentMouseDriver.DetectMouse()
else
DetectMouse:=0;
end;
procedure ShowMouse;
begin
If Assigned(CurrentMouseDriver.ShowMouse) Then
CurrentMouseDriver.ShowMouse();
end;
procedure HideMouse;
begin
If Assigned(CurrentMouseDriver.HideMouse) Then
CurrentMouseDriver.HideMouse();
end;
function GetMouseX:word;
begin
If Assigned(CurrentMouseDriver.GetMouseX) Then
GetMouseX:=CurrentMouseDriver.GetMouseX()
else
GetMouseX:=0;
end;
function GetMouseY:word;
begin
If Assigned(CurrentMouseDriver.GetMouseY) Then
GetMouseY:=CurrentMouseDriver.GetMouseY()
else
GetMouseY:=0;
end;
function GetMouseButtons:word;
begin
If Assigned(CurrentMouseDriver.GetMouseButtons) Then
GetMouseButtons:=CurrentMouseDriver.GetMouseButtons()
else
GetMouseButtons:=0;
end;
procedure SetMouseXY(x,y:word);
begin
If Assigned(CurrentMouseDriver.SetMouseXY) Then
CurrentMouseDriver.SetMouseXY(X,Y)
end;
Procedure GetPendingEvent(Var MouseEvent:TMouseEvent);
begin
MouseEvent:=PendingMouseHead^;
inc(PendingMouseHead);
if PendingMouseHead=@PendingMouseEvent[0]+MouseEventBufSize then
PendingMouseHead:=@PendingMouseEvent[0];
dec(PendingMouseEvents);
if (LastMouseEvent.x<>MouseEvent.x) or
(LastMouseEvent.y<>MouseEvent.y) then
MouseEvent.Action:=MouseActionMove;
if (LastMouseEvent.Buttons<>MouseEvent.Buttons) then
begin
if (LastMouseEvent.Buttons=0) then
MouseEvent.Action:=MouseActionDown
else
MouseEvent.Action:=MouseActionUp;
end;
LastMouseEvent:=MouseEvent;
end;
procedure GetMouseEvent(var MouseEvent:TMouseEvent);
begin
if CurrentMouseDriver.UseDefaultQueue then
begin
if (PendingMouseEvents>0) then
GetPendingEvent(MouseEvent)
else
CurrentMouseDriver.GetMouseEvent(MouseEvent);
{ FillChar(MouseEvent,sizeof(MouseEvent),0);}
end
else
If Assigned(CurrentMouseDriver.GetMouseEvent) Then
begin
LastMouseEvent:=MouseEvent;
CurrentMouseDriver.GetMouseEvent(MouseEvent);
end
else
FillChar(MouseEvent,sizeof(TMouseEvent),0);
end;
procedure PutMouseEvent(const MouseEvent: TMouseEvent);
begin
if CurrentMouseDriver.UseDefaultQueue then
begin
PendingMouseTail^:=MouseEvent;
inc(PendingMouseTail);
if PendingMouseTail=@PendingMouseEvent[0]+MouseEventBufSize then
PendingMouseTail:=@PendingMouseEvent[0];
inc(PendingMouseEvents);
end
else
If Assigned(CurrentMouseDriver.PutMouseEvent) then
CurrentMouseDriver.PutMouseEvent(MouseEvent);
end;
function PollMouseEvent(var MouseEvent: TMouseEvent):boolean;
begin
if (CurrentMouseDriver.UseDefaultQueue) and
(PendingMouseEvents>0) then
begin
MouseEvent:=PendingMouseHead^;
PollMouseEvent:=true;
end
else
If Assigned(CurrentMouseDriver.PollMouseEvent) Then
begin
PollMouseEvent:=CurrentMouseDriver.PollMouseEvent(MouseEvent);
// Put it in queue, so next poll/get will be faster.
// Only if an event was found PM
// If PollMouseEvent then
// PutMouseEvent(MouseEvent);
// This is all wrong, because the Event might already
// have been pushed in the Event Array.
end
else
PollMouseEvent:=false;
end;
Procedure SetMouseDriver(Const Driver : TMouseDriver);
begin
If Not MouseInitialized then
CurrentMouseDriver:=Driver;
end;
Procedure GetMouseDriver(Var Driver : TMouseDriver);
begin
Driver:=CurrentMouseDriver;
end;
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