{-----------------------------------------------------------------------------
The contents of this file are subject to the Mozilla Public License
Version 1.1 (the "License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.mozilla.org/MPL/MPL-1.1.html

Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either expressed or implied. See the License for
the specific language governing rights and limitations under the License.

The Original Code is: JvImageRotate.PAS, released on 2001-02-28.

The Initial Developer of the Original Code is Sébastien Buysse [sbuysse att buypin dott com]
Portions created by Sébastien Buysse are Copyright (C) 2001 Sébastien Buysse.
All Rights Reserved.

Contributor(s):
Michael Beck [mbeck att bigfoot dott com].
Extracted from JvImageThread and saved to a new unit by Peter Thörnqvist

You may retrieve the latest version of this file at the Project JEDI's JVCL home page,
located at http://jvcl.delphi-jedi.org

Known Issues:
-----------------------------------------------------------------------------}
// $Id$

unit JvImageDrawThread;

{$I jvcl.inc}

interface

uses
  {$IFDEF UNITVERSIONING}
  JclUnitVersioning,
  {$ENDIF UNITVERSIONING}
  JvThread,
  Windows,
  Classes;

type
  TJvImageDrawThread = class(TJvPausableThread)
  private
    FTag: Integer;
    FDelay: Cardinal;
    FOnDraw: TNotifyEvent;
  protected
    procedure Draw;
    procedure Execute; override;
  public
    procedure Synchronize(AMethod: TThreadMethod); overload;
    {$IFDEF RTL200_UP}
    procedure Synchronize(AThreadProc: TThreadProcedure); overload;
    {$ENDIF RTL200_UP}

    property Tag: Integer read FTag write FTag;
    property Delay: Cardinal read FDelay write FDelay;
    property OnDraw: TNotifyEvent read FOnDraw write FOnDraw;
    property Terminated;
  end;

{$IFDEF UNITVERSIONING}
const
  UnitVersioning: TUnitVersionInfo = (
    RCSfile: '$URL$';
    Revision: '$Revision$';
    Date: '$Date$';
    LogPath: 'JVCL\run'
  );
{$ENDIF UNITVERSIONING}

implementation


procedure TJvImageDrawThread.Draw;
begin
  if not Terminated and Assigned(FOnDraw) then
    FOnDraw(Self);
end;

procedure TJvImageDrawThread.Execute;
begin
  NameThread(ThreadName);
  try
    while not Terminated do
    begin
      Sleep(FDelay);
      EnterUnpauseableSection;
      try
        if Terminated then
          Exit;

      finally
        LeaveUnpauseableSection;
        Synchronize(Draw);
      end;
    end;
  except
    // ignore exception
  end;
end;

procedure TJvImageDrawThread.Synchronize(AMethod: TThreadMethod);
begin
  inherited Synchronize(AMethod);
end;

{$IFDEF RTL200_UP}
procedure TJvImageDrawThread.Synchronize(AThreadProc: TThreadProcedure);
begin
  inherited Synchronize(AThreadProc);
end;
{$ENDIF RTL200_UP}

{$IFDEF UNITVERSIONING}
initialization
  RegisterUnitVersion(HInstance, UnitVersioning);

finalization
  UnregisterUnitVersion(HInstance);
{$ENDIF UNITVERSIONING}

end.