diagramscene.h

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#ifndef DIAGRAMSCENE_H
#define DIAGRAMSCENE_H

#include "diagramitem.h"
#include "diagramImage.h"
#include "diagramtextitem.h"

#include <QGraphicsScene>

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

//! [0]
// The DiagramScene class inherits QGraphicsScene and adds functionality to handle DiagramItems,
// Arrows, and DiagramTextItems in addition to the items handled by its super class.
// - In the DiagramScene a mouse click can give three different actions: the item under the mouse can be moved, an item may be inserted, or an arrow may be connected between to diagram items. Which action a mouse click has depends on the mode, given by the Mode enum, the scene is in. The mode is set with the setMode() function.
// - The scene also sets the color of its items and the font of its text items. The colors and font used by the scene can be set with the setLineColor(), setTextColor(), setItemColor() and setFont() functions. The type of DiagramItem, given by the DiagramItem::DiagramType function, to be created when an item is inserted is set with the setItemType() slot.
// - The MainWindow and DiagramScene share responsibility for the examples functionality. MainWindow handles the following tasks: the deletion of items, text, and arrows; moving diagram items to the back and front; and setting the scale of the scene.
class DiagramScene : public QGraphicsScene
{
    Q_OBJECT

public:
    enum Mode { InsertItem, InsertHorizontalLine, InsertVerticalLine, InsertText, MoveItem };

    explicit DiagramScene(QMenu *itemMenu, QObject *parent = 0);
    QFont font() const { return myFont; }
    QColor textColor() const { return myTextColor; }
    QColor itemColor() const { return myItemColor; }
    QColor lineColor() const { return myLineColor; }
    void setLineColor(const QColor &color);
    void setTextColor(const QColor &color);
    void setItemColor(const QColor &color);
    void setFont(const QFont &font);
    void addItemsFromList(const std::vector<int> &modelTypes,const std::vector<std::vector<double>> &modelPositions);

// ---------------------- Get and Sets ------------------------
    void setEndOfLine(bool endOfLine){
        EndOfLine = endOfLine;
    }
    bool getEndOfLine(void){
        return EndOfLine;
    }
public slots:
    void setMode(Mode mode);
    void setItemType(DiagramItem::DiagramType type);
    void editorLostFocus(DiagramTextItem *item);

signals:
//    void itemInserted(DiagramItem *item);
    void itemInserted(DiagramItem *item);
    void textInserted(QGraphicsTextItem *item);
    void itemSelected(QGraphicsItem *item);
    void checkItemPosition();
    void itemsInserted(DiagramItem *item, std::size_t nModels, const std::vector<std::vector<double>>& modelPosition);
    void itemsInserted(diagramImage* item,DiagramItem::DiagramType type);
    void testSignal(DiagramItem *item, std::size_t nModels);

protected:
    void mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent);
    void mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent);
    void mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent);

private:
    bool isItemChange(int type);

    DiagramItem::DiagramType myItemType;
    QMenu *myItemMenu;
    Mode myMode;
    bool leftButtonDown;
    bool EndOfLine;
    QPointF startPoint;
    QPointF endPoint;

    QGraphicsLineItem *line;
    QFont myFont;
    DiagramTextItem *textItem;
    QColor myTextColor;
    QColor myItemColor;
    QColor myLineColor;

};

#endif // DIAGRAMSCENE_H