NodeGraphicsItem.h

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/*
-----------------------------------------------------------------------------
This source file is part of FRAPPER
research.animationsinstitut.de
sourceforge.net/projects/frapper

Copyright (c) 2008-2009 Filmakademie Baden-Wuerttemberg, Institute of Animation 

This program 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; version 2.1 of the License.

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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
-----------------------------------------------------------------------------
*/


#ifndef NODEGRAPHICSITEM_H
#define NODEGRAPHICSITEM_H

#include "FrapperPrerequisites.h"
#include "BaseRectItem.h"
#include "Node.h"
#include "FlagGraphicsItem.h"
#include "ViewFlagGraphicsItem.h"
#include "PinGraphicsItem.h"
#include "instancecountermacros.h"
#include <QtGui/QGraphicsSceneContextMenuEvent>
#include <QtGui/QWidget>
#include <QtGui/QMenu>

namespace Frapper {

    class ConnectionGraphicsItem;


    class FRAPPER_CORE_EXPORT NodeGraphicsItem : public QObject, public BaseRectItem
    {

        Q_OBJECT
            ADD_INSTANCE_COUNTER

    public: // nested enumerations

        enum PinDisplayMode {
            PDM_All,
            PDM_Connected,
            PDM_Collapsed
        };

    public: // static constants

        static const int ItemWidth = 60;

        static const int ItemBaseHeight = 44;

        static const int ItemPinRowHeight = 12;

    private: // static data

        static int s_numberOfNodeGraphicsItems;

    public: // constructors and destructors

        NodeGraphicsItem ( Node *node, QPointF position, const QColor &color );

        ~NodeGraphicsItem ();

    public: // functions

        void setEnabled ( bool enabled );

        void paint ( QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0 );

        Node * getNode () const;

        void resetNode ();

        void bringToFront ();

        void addConnectionItem ( ConnectionGraphicsItem *item );

        void removeConnectionItem ( ConnectionGraphicsItem *item );

        void removeConnectionItems ();

        void setPinDisplayMode ( PinDisplayMode pinDisplayMode );

        public slots: //

            //void removeConnectionItem ( ConnectionGraphicsItem *item );

            void setSelected ( bool selected );

            void createConnection ( PinGraphicsItem *pinItem, Parameter *parameter );

            void refresh ();

signals: //

            void connectionRequested ( Parameter *sourceParameter, Parameter *targetParameter );

            void connectionRequested ( Node *sourceNode, Node *targetNode );

            void nodeGraphicsItemMoved ( const QPointF &pos );

    protected: // functions

        void mousePressEvent ( QGraphicsSceneMouseEvent *event );

        void mouseReleaseEvent ( QGraphicsSceneMouseEvent *event );

        void contextMenuEvent ( QGraphicsSceneContextMenuEvent *event );

        QVariant itemChange ( GraphicsItemChange change, const QVariant& value );

    private: // functions

        void updatePins ();

        void disableOtherPins ( PinGraphicsItem *pinItem, Parameter *parameter );

        void beginCreatingConnection ( PinGraphicsItem *pinItem, Parameter *parameter );

        void endCreatingConnection ( PinGraphicsItem *pinItem, Parameter *parameter );

        private slots: //

            void connectByNameClicked ();

            void updatePinDisplayMode ( QAction *action );

    private: // data

        Node *m_node;

        FlagGraphicsItem *m_evalFlagItem;

        ViewFlagGraphicsItem *m_viewFlagItem;

        PinDisplayMode m_pinDisplayMode;

        QList<PinGraphicsItem *> m_inputPins;

        QList<PinGraphicsItem *> m_outputPins;

        QMap<unsigned int, ConnectionGraphicsItem *> m_connectionItems;

        QMenu m_nodeContextMenu;

        QMenu m_pinContextMenu;

    };

} // end namespace Frapper

#endif