Unsolved I can't create an animated sprite with Qt C++

[Cold_Distance]

Hi, I'm trying to make a little animated sprite, but don't get it. I read something about QPainter but I don't find any example related with the thing I want to do.

These are the three files of the project:

spriter.h:

#ifndef SPRITER_H
#define SPRITER_H

#include <QObject>
#include <QGraphicsPixmapItem>
#include <QImage>

class spriter: public QObject, public QGraphicsPixmapItem {
    Q_OBJECT
public:
    spriter(QGraphicsItem * parent=0);
    QPixmap sprite;
    QPixmap sheet;
public slots:
    void move();
public slots:
    void animar();
};

#endif // SPRITER_H

spriter.cpp:

#include "spriter.h"
#include <QTimer>
#include <QGraphicsScene>
#include <stdlib.h>
#include <QDebug>
#include <QPainter>


spriter::spriter(QGraphicsItem *parent) : QObject(), QGraphicsPixmapItem(parent)
{
    setPos(200,200); 

    sheet = QPixmap(":/dragon.png");
    sprite = sheet.copy(0, 0, 64, 64);
    //setPixmap(sprite);
    //animar(sheet,sprite);

    QTimer *temporizador = new QTimer();
    connect(temporizador,SIGNAL(timeout()),this,SLOT(move()));
    connect(temporizador,SIGNAL(timeout()),this,SLOT(animar()));
    temporizador->start(60);
}

void spriter::animar() {

    for(int i=0; i<(sheet.width()/sprite.width()); i++){
        setPixmap(QPixmap(sheet.copy(i*sprite.width(), 0, 64, 64)));
    }
    for(int i=(sheet.width()/sprite.width())-1; i>0; i--){
        setPixmap(QPixmap(sheet.copy(i*sprite.width(), 0, 64, 64)));
    }
}


void spriter::move()
{

    setPos(x()+5, y());

    if(x() >= 1000){
        setPos(200, y());
    }

}

main.cpp:

#include <QApplication>
#include <QGraphicsScene>
#include <QGraphicsView>
#include "spriter.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    // create a scene
    QGraphicsScene * scene = new QGraphicsScene();

    spriter *cosilla = new spriter();
    scene->addItem(cosilla);

    // add a view to visualize the scene
    QGraphicsView * view = new QGraphicsView(scene); 

    view->show();
    view->setFixedSize(800,600); 
    scene->setSceneRect(0,0, 798,580); 

    return a.exec();
}

I will be very grateful if someone helps me to solve this problem.

[SGaist]

Hi,

The first thing that comes to mind is that you are blocking the event loop with your for loop in move. You should rather use a QTimer to trigger the move a regular interval.

On a side note, you are leaking your view in main.