I'm creating a 2D game in QT and i'm trying to implement a drag & drop into my program.
For some reason the drop is not registered: qDebug should print a message on dropping but this doesn't happen.
#include "dialog.h"
#include "ui_dialog.h"
#include "world.h"
#include <vector>
Dialog::Dialog(QWidget *parent) : QDialog(parent), ui(new Ui::Dialog)
{
    ui->setupUi(this);
    scene = new QGraphicsScene(this);
    ui->graphicsView->setScene(scene);
    MySquare *item;
    QGraphicsRectItem *enemyItem;
    World *myWorld = new World();
    std::vector<Tile*> tiles = myWorld->createWorld(":/texture.jpg");
    int count = 0;
    foreach (Tile *tile, tiles){
        count++;
       item = new MySquare(tile->getXPos()*4,tile->getYPos()*4,4,4);
       item->setBrush(QColor(tile->getValue()*255,tile->getValue()*255,tile->getValue()*255));
       item->setAcceptDrops(true);
       scene->addItem(item);
    }
    player = new MySquare(10,20,10,10);
    player->setAcceptDrops(true);
    scene->addItem(player);
    //drag & drop part
    QPushButton *pushButton = new QPushButton("Click Me",this);
    connect(pushButton,SIGNAL(pressed()),this,SLOT(makeDrag()));
    setAcceptDrops(true);
}
void Dialog::makeDrag()
{
    QDrag *dr = new QDrag(this);
    // The data to be transferred by the drag and drop operation is contained in a QMimeData object
    QMimeData *data = new QMimeData;
    data->setText("This is a test");
    // Assign ownership of the QMimeData object to the QDrag object.
    dr->setMimeData(data);
    // Start the drag and drop operation
    dr->start();
}
mysquare.cpp
#include "mysquare.h"
MySquare::MySquare(int _x,int _y, int _w, int _h)
{
    isPlayer=false;
    Pressed=false;
    setFlag(ItemIsMovable);
    setFlag(ItemIsFocusable);
    setAcceptDrops(true);
    color=Qt::red;
    color_pressed = Qt::green;
    x = _x;
    y = _y;
    w = _w;
    h = _h;
}
QRectF MySquare::boundingRect() const
{
    return QRectF(x,y,w,h); 
}
void MySquare::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
    QRectF rec = boundingRect();
    QBrush brush(color);
    if (Pressed){
        brush.setColor(color);
    } else {
        brush.setColor(color_pressed);
    }
    painter->fillRect(rec,brush);
    painter->drawRect(rec);
}
void MySquare::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    Pressed=true;
    update();
    QGraphicsItem::mousePressEvent(event);
    qDebug() << "mouse Pressed";
}
void MySquare::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
    Pressed=false;
    update();
    QGraphicsItem::mousePressEvent(event);
    qDebug() << "mouse Released";
}
void MySquare::keyPressEvent(QKeyEvent *event){
    int x = pos().x();
    int y = pos().y();
    //key handling
    QGraphicsItem::keyPressEvent(event);
}
void MySquare::dropEvent(QDropEvent *event)
{
    qDebug("dropEvent - square");
    // Unpack dropped data and handle it the way you want
    qDebug("Contents: %s", event->mimeData()->text().toLatin1().data());
}
void MySquare::dragMoveEvent(QDragMoveEvent *event){
    qDebug("dragMoveEvent - square ");
    event->accept();
}
void MySquare::dragEnterEvent(QDragEnterEvent *event){
    event->setAccepted(true);
    qDebug("dragEnterEvent - square");
    event->acceptProposedAction();
}
void MySquare::setBrush(QColor _color){
    color = _color;
    color_pressed = _color;
    update(); //repaint
}
edit; there is no problem with qDebug() i'm just using it to test them i'm inside the drag events..which i'm not