WTTreeVisualizer.h

/*
 * header file for WTTreeVisualizer class
 * written by: christian moellinger <ch.moellinger@gmail.com>
 * 03/2011 - 06/2011 Project "InfoVis: Word Tree"
 */

#ifndef WTTREEVISUALIZER_H
#define WTTREEVISUALIZER_H

#include <QObject>
#include <QSharedPointer>
#include <QGraphicsScene>
#include <QTimer>
#include "WTBackend.h"
#include "WTVisualizedTree.h"

/*! This class takes a WTVisualizedTree object and redraws it (on a graphics scene / view)
 */
class WTTreeVisualizer : public QObject
{
    Q_OBJECT
public:
    /*! \name Construction / Destruction */
    //@{
        /// Constructor
        explicit WTTreeVisualizer(QObject *parent = 0);

        /// Destructor
        ~WTTreeVisualizer();
    //@}


    /*! \name Public methods */
    //@{
        /// this method sets the graphics view where the output should be drawn
        void SetGraphicsView(QGraphicsView *pGraphicsView);

        /// this method draws a visualized tree on the output view
        void VisualizeWordTree(QSharedPointer<WTVisualizedTree> spWordTree);
    //@}
private slots:
    void TimerStep();

private:
    /*! \name Private methods */
    //@{
        /// renders a tree transition between two trees
        void ItlDrawTreeTransition(QSharedPointer<WTVisualizedTree> spTree1,
                                QSharedPointer<WTVisualizedTree> spTree2,
                                float fAlpha);
    //@}

    /*! \name Private members */
    //@{
        QSharedPointer<WTVisualizedTree> m_spLastVisualizedWordTree;
        QSharedPointer<WTVisualizedTree> m_spNewVisualizedWordTree;
        QGraphicsView *m_pGraphicsView;
        QTimer m_rTimer;

        int m_iMillisecondsLeft;
    //@}

};

#endif // WTTREEVISUALIZER_H