rosegarden/src/gui/general/BaseTool.h

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */

/*
    Rosegarden
    A MIDI and audio sequencer and musical notation editor.

    This program is Copyright 2000-2008
        Guillaume Laurent   <glaurent@telegraph-road.org>,
        Chris Cannam        <cannam@all-day-breakfast.com>,
        Richard Bown        <richard.bown@ferventsoftware.com>

    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
    Bown to claim authorship of this work have been asserted.

    Other copyrights also apply to some parts of this work.  Please
    see the AUTHORS file and individual file headers for details.

    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.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef _RG_BASETOOL_H_
#define _RG_BASETOOL_H_

#include <tqobject.h>
#include <tqstring.h>


class TQPopupMenu;
class KXMLGUIFactory;


namespace Rosegarden
{



/**
 * BaseTool : base tool class, just handles RMB menu creation and
 * handling by a BaseToolBox
 * 
 */
class BaseTool : public TQObject
{
    Q_OBJECT
  TQ_OBJECT
    
    friend class BaseToolBox;

public:

    virtual ~BaseTool();

    /**
     * Is called by the parent View (EditView or SegmentCanvas) when
     * the tool is set as current.
     * Add any setup here (e.g. setting the mouse cursor tqshape)
     */
    virtual void ready();

    /**
     * Is called by the parent View (EditView or SegmentCanvas) after
     * the tool is put away.
     * Add any cleanup here
     */
    virtual void stow();

    /**
     * Show the menu if there is one
     */
    virtual void showMenu();

    /**
     * Retrieve current status-line type help for the tool, if any
     */
    virtual TQString getCurrentContextHelp() const;

signals:
    void showContextHelp(const TQString &);

protected:
    /**
     * Create a new BaseTool
     *
     * \a menuName : the name of the menu defined in the XML rc file
     */
    BaseTool(const TQString& menuName, KXMLGUIFactory*, TQObject* parent);

    virtual void createMenu() = 0;
    virtual bool hasMenu() { return false; }

    virtual void setContextHelp(const TQString &help);
    virtual void clearContextHelp() { setContextHelp(""); }

    //--------------- Data members ---------------------------------

    TQString m_menuName;
    TQPopupMenu* m_menu;

    KXMLGUIFactory* m_parentFactory;

    TQString m_contextHelp;
};



}

#endif