#ifndef ELEMENTS_H
#define ELEMENTS_H

#include <qpainter.h>
#include <QObject>
#include <QGraphicsLineItem>
#include <QGraphicsRectItem>
#include <QGraphicsEllipseItem>
#include <QGraphicsTextItem>
#include <QGraphicsPixmapItem>
#include <QGraphicsItem>
#include <QTabWidget>
#include <QDomElement>
#include <QSettings>
//#include <elements/pixmapitem.h>
//#include <elements/textitem.h>

class EdgeItem;
class NodeItem;
class LineItem;
class RectItem;
class TextItemI;
class PixmapItem;

//QBrush *tb = 0;
//QPen *tp = 0;
//QBrush *db = 0;

class EdgeItem:public QObject
{
	Q_OBJECT
public:
	EdgeItem( NodeItem*, NodeItem* );
	EdgeItem( QDomElement el){el=el;};
	virtual void setFromPoint( int x, int y ){x=x;y=y;};
	virtual void setToPoint( int x, int y ){x=x;y=y;};
	virtual void setPen ( const QPen & pen ) {ipen=pen;};
	virtual void setFlag ( QGraphicsItem::GraphicsItemFlag flag, bool enabled = true ) {flag=flag;};
	virtual void setBrush ( const QBrush & brush ) {ibrush=brush;};
	virtual void setTabs( QTabWidget *properties){};
	virtual bool block() {return block_;};
	virtual void setBlock(bool s) {block_ = s;};
	virtual void paintItem(int x, int y,QPainter *pp, qreal scale){};
	virtual QDomElement toXml(QDomDocument doc){return QDomElement();};
	NodeItem *from_node;
	NodeItem *to_node;
//	QSettings *conf;
	int item_type;
	bool block_;
	QPen ipen;
	QBrush ibrush;
signals:
	void item_selected(EdgeItem *item);
	void position_changed(EdgeItem *item);
};

class LineItem: public EdgeItem, public QGraphicsLineItem
{
public:
	LineItem( NodeItem*, NodeItem* );
	LineItem( QDomElement el);
	virtual void setFromPoint( int x, int y ) ;
	virtual void setToPoint( int x, int y );
	virtual void setPen ( const QPen & pen ) {EdgeItem::setPen(pen);QGraphicsLineItem::setPen(pen);};
	virtual void setFlag ( QGraphicsItem::GraphicsItemFlag flag, bool enabled = true ) {QGraphicsLineItem::setFlag(flag, enabled);};
	virtual void setBrush ( const QBrush & brush ) {ibrush=brush;};
	virtual void setTabs( QTabWidget *properties);
	virtual QDomElement toXml(QDomDocument doc);
	virtual void paintItem(int x, int y, QPainter *pp, qreal scale);
protected:
	QVariant itemChange(GraphicsItemChange change, const QVariant &value);
};

class RectItem: public EdgeItem, public QGraphicsRectItem
{
public:
	RectItem( NodeItem*, NodeItem* );
	RectItem( QDomElement el);
	virtual void setFromPoint( int x, int y ) ;
	virtual void setToPoint( int x, int y );
	virtual void setPen ( const QPen & pen ) {EdgeItem::setPen(pen);QGraphicsRectItem::setPen(pen);};
	virtual void setTabs( QTabWidget *properties);
	virtual void setFlag ( QGraphicsItem::GraphicsItemFlag flag, bool enabled = true ) {QGraphicsRectItem::setFlag(flag, enabled);};
	virtual void setBrush ( const QBrush & brush ) {EdgeItem::setBrush(brush);QGraphicsRectItem::setBrush(brush);};
	virtual QDomElement toXml(QDomDocument doc);
	virtual void paintItem(int x, int y,QPainter *pp, qreal scale);
protected:
	QVariant itemChange(GraphicsItemChange change, const QVariant &value);
};

class EllipseItem: public EdgeItem, public QGraphicsEllipseItem
{
public:
	EllipseItem( NodeItem*, NodeItem* );
	EllipseItem( QDomElement el);
	virtual void setFromPoint( int x, int y ) ;
	virtual void setToPoint( int x, int y );
	virtual void setPen ( const QPen & pen ) {EdgeItem::setPen(pen);QGraphicsEllipseItem::setPen(pen);};
	virtual void setTabs( QTabWidget *properties);
	virtual void setFlag ( QGraphicsItem::GraphicsItemFlag flag, bool enabled = true ) {QGraphicsEllipseItem::setFlag(flag, enabled);};
	virtual void setBrush ( const QBrush & brush ) {EdgeItem::setBrush(brush);QGraphicsEllipseItem::setBrush(brush);};
	virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
	virtual QDomElement toXml(QDomDocument doc);
	virtual void paintItem(int x, int y,QPainter *pp, qreal scale);
protected:
	QVariant itemChange(GraphicsItemChange change, const QVariant &value);
};

class NodeItem: public QGraphicsRectItem
{
public:
	NodeItem();
	~NodeItem() {}

	void setInEdge( EdgeItem *edge );
	void setOutEdge( EdgeItem *edge ) { outItem = edge ; }

protected:
	QVariant itemChange(GraphicsItemChange change, const QVariant &value);
	void mousePressEvent ( QGraphicsSceneMouseEvent * event );
	void mouseReleaseEvent ( QGraphicsSceneMouseEvent * event );

private:
	EdgeItem *inItem;
	EdgeItem *outItem;
};

#endif