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#ifndef DIAGRAMSCENE_H
#define DIAGRAMSCENE_H

#include <QGraphicsScene>
#include <QDesktopServices>
#include <QtXml>
#include "diagramtextitem.h"
#include "arrow.h"

QT_BEGIN_NAMESPACE
class QGraphicsSceneMouseEvent;
class QMenu;
class QPointF;
class QGraphicsLineItem;
class QFont;
class QGraphicsTextItem;
class QColor;
QT_END_NAMESPACE

class Arrow;
class DiagramTextItem;

class DiagramScene : public QGraphicsScene
{
    Q_OBJECT

public:
    enum Mode { MoveItem , EditPolygon, InsertText };

    DiagramScene(QMenu *itemMenu, QObject *parent = 0);

    QDomDocument toXmlFormat();
    int fromXmlFormat(QDomDocument xmlDocument);
    void cleanScene();
    void setTextType(int type,QString text){myTextType=type;myTypeString=text;}
    void resetMyPolygon(){myPolygonPath=0;}

    QHash<int,DiagramTextItem*> getTextItemsByID;

    int addTextItem(DiagramTextItem * textItem);
    void removeTextItem(DiagramTextItem * textItem);

public slots:
    void setMode(Mode mode){myMode=mode;}    
    void editorLostFocus(DiagramTextItem *item);

signals:    
    void textInserted(QGraphicsTextItem *item);

protected:
    void mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent);
    void mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent);
    void mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent);
    void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event);
    void drawBackground(QPainter *p, const QRectF &r);

private:
    bool isItemChange(int type);
    void doSnapToGrid(QGraphicsSceneMouseEvent *mouseEvent);
    QMenu *myItemMenu;
    Mode myMode;
    int myTextType;
    QString myTypeString;
    bool leftButtonDown;
    QPointF startPoint;
    QGraphicsLineItem *line;
    Arrow *myPolygonPath;
    QFont myFont;
    DiagramTextItem *textItem;
    DiagramTextItem *TitleText;
    QColor myTextColor;
    QColor myItemColor;
    QColor myLineColor;
    bool snapToGrid;
    short int myGrid;
    int myCorners;
    QHash<int,DiagramTextItem*> textItemsByID;
};

#endif