widget_pool.hh

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//------------------------------------------------------------------------------
// This file is part of the OpenStructure project <www.openstructure.org>
//
// Copyright (C) 2008-2011 by the OpenStructure authors
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License as published by the Free
// Software Foundation; either version 3.0 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 Lesser General Public License for more
// details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this library; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//------------------------------------------------------------------------------
#ifndef OST_GUI_WIDGET_POOL_HH
#define OST_GUI_WIDGET_POOL_HH

#include <ost/gui/widget.hh>
#include <QSettings>
/*
  Author: Marco Biasini, Stefan Scheuber
 */
namespace ost { namespace gui {

struct PooledWidget
{
  PooledWidget():
    name(""), available(-1)
  { }

  PooledWidget(const QString& n, int lim=-1):
    name(n), available(lim), limit(lim)
  { }
  QString name;
  int     available;
  int     limit;
};

class DLLEXPORT_OST_GUI WidgetPool : public QObject {
  Q_OBJECT
public:
  WidgetPool(QObject* parent=NULL);

  void Add(const QString& name, int limit=-1);

  bool IsAvailable(const QString& name);

  Widget* Create(const QString& name);

  bool Take(const QString& name);

  bool Give(const QString& name);

  QList<QString> GetAvailableWidgets();

private:
  QMap<QString, PooledWidget> pool_;
};

}}
#endif /* OST_GUI_WIDGET_POOL_HH */