Inheritance with QGraphicsItem and QGraphicsLineItem - c++

Question

I have a class, that inherits QGraphicsItem and this class needs to be inherited by another class that inherits QGraphicsLineItem and QGraphicsTextItem. When I do this it gives me the error class Line has no member named setLine
Following is the whole scenerio explained:
getEntity.h
#ifndef getEntity_H
#define getEntity_H
#include <QGraphicsItem>
class getEntity :public QObject , public QGraphicsItem
{
public:
getEntity(QObject* parent=0) : QObject(parent) {}
virtual ~getEntity() {}
virtual getEntity* my_clone() { return 0; }
};
#endif // getEntity_H
line.h
//This is my class that needs to inherits gEntity
#ifndef LINE_H
#define LINE_H
#include <QPainter>
#include <QGraphicsLineItem>
class Line : public QObject, public QGraphicsLineItem
{
Q_OBJECT
public:
Line(int, QPointF, QPointF);
QRectF boundingRect() const;
virtual void paint(QPainter *painter,
const QStyleOptionGraphicsItem *option,
QWidget *widget);
enum { Type = UserType + 2 };
int type() const;
int id;
QPointF start_p, end_p, move_p, check_p;
private:
QVector<QPointF> stuff;
};
#endif // LINE_H
line.cpp
#include "line.h"
Line::Line(int i, QPointF p1, QPointF p2)
{
// assigns id
id = i;
// set values of start point and end point of line
start_p = p1;
end_p = p2;
}
int Line::type() const
{
// Enable the use of qgraphicsitem_cast with line item.
return Type;
}
QRectF Line::boundingRect() const
{
qreal extra = 1.0;
// bounding rectangle for line
return QRectF(line().p1(), QSizeF(line().p2().x() - line().p1().x(),
line().p2().y() - line().p1().y()))
.normalized()
.adjusted(-extra, -extra, extra, extra);
}
void Line::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
QWidget *widget)
{
// draws/paints the path of line
QPen paintpen;
painter->setRenderHint(QPainter::Antialiasing);
paintpen.setWidth(1);
if (isSelected())
{
// sets brush for end points
painter->setBrush(Qt::SolidPattern);
paintpen.setColor(Qt::red);
painter->setPen(paintpen);
painter->drawEllipse(start_p, 2, 2);
painter->drawEllipse(end_p, 2, 2);
// sets pen for line path
paintpen.setStyle(Qt::DashLine);
paintpen.setColor(Qt::black);
painter->setPen(paintpen);
painter->drawLine(start_p, end_p);
}
else
{ painter->save();
painter->setBrush(Qt::SolidPattern);
paintpen.setColor(Qt::black);
painter->setPen(paintpen);
painter->drawEllipse(start_p, 2, 2);
painter->drawEllipse(end_p, 2, 2);
painter->drawLine(start_p, end_p);
painter->restore();
}
}
cadgraphicscene.cpp
//Here it returns pointing to setLine method, when I inherit getEntity in Line class
if (mPaintFlag)
{
lineItem = new Line(++id, start_p, end_p);
lineItem->setLine(start_p.x(), start_p.y(), end_p.x(), end_p.y());
How the Line class can correctly inherit getEntity? Do help!