/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
 *
 * This library is open source and may be redistributed and/or modified under
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 *
 * 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
 * OpenSceneGraph Public License for more details.
*/
//osgManipulator - Copyright (C) 2007 Fugro-Jason B.V.

#ifndef OSGMANIPULATOR_COMMANDMANAGER
#define OSGMANIPULATOR_COMMANDMANAGER 1

#include <osgManipulator/Dragger>
#include <osgManipulator/Selection>
#include <osgManipulator/Constraint>

namespace osgManipulator {

/**
 * Command manager receives commands from draggers and dispatches them to selections.
 */
class OSGMANIPULATOR_EXPORT CommandManager : public osg::Referenced
{
    public:
        CommandManager();

        /** 
         * Connect a dragger to a selection. The selection will begin listening 
         * to commands generated by the dragger. This can be called multiple 
         * times to connect many selections to a dragger. 
         */
        virtual bool connect(Dragger& dragger, Selection& selection);

        virtual bool connect(Dragger& dragger, Constraint& constrain);

        /** Disconnect the selections from a dragger. */
        virtual bool disconnect(Dragger& dragger);

        /** Dispatches a command. Usually called from a dragger. */
        virtual void dispatch(MotionCommand& command);

        /** Add all selections connected to the dragger to the command. */
        void addSelectionsToCommand(MotionCommand& command, Dragger& dragger);

        typedef std::list< osg::ref_ptr<Selection> > Selections;

        /** Returns the selections connected to the dragger */
        Selections getConnectedSelections(Dragger& dragger);

    protected:

        virtual ~CommandManager();

        typedef std::multimap< osg::ref_ptr<Dragger>, osg::ref_ptr<Selection> > DraggerSelectionMap;
        DraggerSelectionMap _draggerSelectionMap;

        typedef std::multimap< osg::ref_ptr<Dragger>, osg::ref_ptr<Constraint> > DraggerConstraintMap;
        DraggerConstraintMap _draggerConstraintMap;
};

}

#endif