bullet.cpp

#include <QTimer>
#include <QGraphicsScene>
#include <QList>

#include "bullet.h"
#include "enemy.h"
#include"gamebase.h"

extern GameBase *game;

Bullet::Bullet(QGraphicsItem *parent): QObject(), QGraphicsPixmapItem(parent){
    QPixmap pixmap(":/new/images/resource/images/fire.jpg");
    setPixmap(pixmap.scaled(10,10));


    QTimer * timer = new QTimer();
    connect(timer,SIGNAL(timeout()),this,SLOT(move()));

    timer->start(50);
}

void Bullet::move(){
    QList<QGraphicsItem *> colliding_items = collidingItems();


    for (int i = 0, n = colliding_items.size(); i < n; ++i){
        if (typeid(*(colliding_items[i])) == typeid(Enemy)){
            game->score->increase();

            scene()->removeItem(colliding_items[i]);
            scene()->removeItem(this);

            delete colliding_items[i];
            delete this;

            return;
        }
    }

    setPos(x(),y()-10);
    if (pos().y() < 0){
        scene()->removeItem(this);
        delete this;
    }
}