/*
 *  copyright (C) 2004
 *  Umbrello UML Modeller Authors <uml-devel@ uml.sf.net>
 */

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef TOOLBARSTATEFACTORY_H
#define TOOLBARSTATEFACTORY_H

#include "toolbarstate.h"

#include "worktoolbar.h"

#define NR_OF_TOOLBAR_STATES 4

class UMLView;


/**
 * The ToolBarStateFactory keeps track of all the toolbar states. For the first
 * request, the factory creates a new state object. The next requests to this
 * object, this factory will return the existing object. 
 * 
 * States that inherit from the ToolBarStatePool share multiple toolbar states.
 * Therefore the setButton function is called. Internally the shared state object 
 * determines the exact behavior by itself.
 */
class ToolBarStateFactory
{
public:
    // constructor.
    ToolBarStateFactory(UMLView* umlView);

    // Destructor
    virtual ~ToolBarStateFactory();

    ToolBarState* getState(const WorkToolBar::ToolBar_Buttons &toolbarButton);

protected:
    int getKey(const WorkToolBar::ToolBar_Buttons &toolbarButton) const;

protected:
    ToolBarState* states[NR_OF_TOOLBAR_STATES];

    UMLView* m_pUMLView;
};

#endif //TOOLBARSTATEFACTORY_H
