#ifndef _SCREENSHAPE_H_
#define _SCREENSHAPE_H_

#include <QtGui>
#include <QObject>
#include <QtXml>
#include <QtOpenGL>

#pragma warning(disable: 4003)
#include "gmtl/gmtl.h"

namespace projection
{
class Screen;

/**
 * Screen shape base class.
 */
class ScreenShape : public QObject
{
	Q_OBJECT 
public:

    /**
     * Constructor.
     *
     * @param pScreen Screen data.
     */
    ScreenShape(Screen* pScreen);

    /**
     * Destructor.
     */
    virtual ~ScreenShape();

    /**
     * Draw a screen with dislay list cache.
     *
     * @param bFrame True to draw a wire frame mesh. False to draw as a polygon model.
     */
    void draw(bool bFrame);

    /**
     * Retrieve name of the sceen shape.
     *
     * @return Name of the screen shape.
     */
    virtual QString getName() const = 0;

    /**
     * Retrieve bounding box of the screen shape.
     *
     * @param min One corner of the screen shape.
     * @param max Another corner of the screen shape.
     */
    virtual void getBoundingBox(gmtl::Vec3f& min, gmtl::Vec3f& max) = 0;

    /**
     * Check whether the shape needs clipping for projection image.
     *
     * @return True if  the projection requires clipping.
     */
    virtual bool isClippingRequired() const { return true; }

    /**
     * Restore the screen shape from XML data.
     *
     * @param element Parent XML element of the screen shape data.
     */
    virtual bool initFromDOMElement(const QDomElement& element) = 0;

    /**
     * Store the current screen shape as XML data.
     *
     * @param name XML node name of the data.
     * @param doc XML document to store the data.
     * @return Current screen shape data as XML data.
     */
    virtual QDomElement domElement(const QString& name, QDomDocument& doc) const = 0;

protected:

    /**
     * Draw the shape model in inherited class.
     *
     * @param bFrame True to draw a wire frame mesh. False to draw as a polygon model.
     */
    virtual void drawShape(bool bFrame) = 0;

    /**
     * Notify to redraw the screen shape.
     */
    void notifyRedraw();

protected:

    Screen* m_pScreen;  //!< Screen data.

    unsigned int m_dlIndex; //!< Display list index.
    bool m_bDirty;          //!< Dirty flag. True to redraw the screen shape.
};

}; // projection

#endif // _SCREENSHAPE_H_