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/*
    This file is part of KOrganizer.

    Copyright (c) 2000,2003 Cornelius Schumacher <schumacher@kde.org>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    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. See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

    As a special exception, permission is given to link this program
    with any edition of TQt, and distribute the resulting executable,
    without including the source code for TQt in the source distribution.
*/
#ifndef KOWINDOWLIST_H
#define KOWINDOWLIST_H

#include <tqobject.h>

namespace KOrg {
class MainWindow;
}

class KURL;

/**
  This class manages a list of KOrganizer instances, each associated with a
  window displaying a calendar. It acts as relay for signals between this
  windows and manages information, which requires interaction of all instances.

  @short manages a list of all KOrganizer instances
  @author Cornelius Schumacher
*/
class KOWindowList : public TQObject
{
    Q_OBJECT
  
  public:
    /**
      Constructs a new list of KOrganizer windows. There should only be one
      instance of this class. The ActionManager class takes care of this.
    */
    KOWindowList( const char *name = 0 );
    virtual ~KOWindowList();

    /**
      Is there only one instance left?
    */
    bool lastInstance();

    /**
      Is there a instance with this URL?
    */
    KOrg::MainWindow *findInstance( const KURL &url );

    /**
      Return default instance. This is the main window for the resource based
      calendar.
    */
    KOrg::MainWindow *defaultInstance();

  public slots:
    /**
      Register a main window.
    */
    void addWindow( KOrg::MainWindow * );
    /**
      Unregister a main window.
    */
    void removeWindow( KOrg::MainWindow * );

  private:
    TQPtrList<KOrg::MainWindow> mWindowList; // list of all existing KOrganizer instances

    KOrg::MainWindow *mDefaultWindow;
};

#endif