Qt call a class from a QGraphicsItem - qt

Question

Well so I'm creating a Tower Defense game in Qt.
So my Tower is shouting and spawning a bullet class.
In this bullet class there is a polygon around it that allows me to detect if there's an enemy touching the bullet:
QList<QGraphicsItem*> colliding_items=collidingItems();
for(int i=0,n=colliding_items.size();i<n;i++){
if(typeid(*(colliding_items[i]))==typeid(Enemy))
{
//<------------ HERE ?
scene()->removeItem(this);
delete this;
return;
}
}
I created a function in the header file Enemy.h called receiveDamage(int damage):
void Enemy::reciveDamage(int damage){
m_health -= damage;
if(m_health <= 0){
game->scene->removeItem(this);
delete this;
return;
}
}
Content of Ennemy.h:
#ifndef ENEMY_H
#define ENEMY_H
#include <QGraphicsPixmapItem>
#include <QObject>
#include <QList> // list << element
#include <QPointF>
class Enemy: public QObject, public QGraphicsPixmapItem{
Q_OBJECT
public:
Enemy(QGraphicsItem * parent=0);
void rotateToPoint(QPointF p);
void reciveDamage(int damage);
public slots:
void move_forward();
private:
QList<QPointF> points;
QPointF dest;
int point_index;
int m_speed = 2;
int m_health = 100;
};
#endif // ENEMY_H
But I don't know how to call it in my code up there, any ideas ?

Answer 1

Yes, just dynamic_cast or qobject_cast the QGraphicsItem into a Enemy class and call getDamage on it.
If I suppose that the amount of damage is given by a method named sendDamage, the code could look like:
QList<QGraphicsItem*> colliding_items=collidingItems();
for(int i=0, n=colliding_items.size(); i<n; i++){
if(typeid(*(colliding_items[i])) == typeid(Enemy))
{
Enemy* enemy = qobject_cast<Enemy*> (colliding_items[i]);
if (enemy)
{
enemy->getDamage(this->sendDamage());
}
scene()->removeItem(this);
delete this;
return;
}
}