QWidget - Q_OBJECT makes the widget disappear

Ok hey guys, I have a very very weird bug. If I add the Q_OBJECT line to the class it makes it disappear. I have kept the class very small to show the bug. The class works like a charm when Q_OBJECT isn't present, but I need it to emit signals.
By disappear I mean that it doesn't show the class at all anymore on the UI, on the widget. It still somewhat works, because it creates a new window if I set the parent to NULL, indicating that the class is still somewhat operational.

rgcbutton.h

Code:

---

#ifndef RGCBUTTON_H
#define RGCBUTTON_H
 
#include <QWidget>
 
class rgcbutton : public QWidget
{
    //Q_OBJECT
 
public:
    rgcbutton(QWidget *parent);
    ~rgcbutton();
 
};
 
#endif // RGCBUTTON_H

---

rgcbutton.cpp

Code:

---

#include "rgcbutton.h"
#include <QMouseEvent>
 
rgcbutton::rgcbutton(QWidget *parent) : QWidget(parent)
{
    QImage ximg; ximg.load("skins/default/images/exit_inactive.png");
    setStyleSheet("background-image: url(skins/default/images/exit_inactive.png);");
    setFixedSize(ximg.size());
}
rgcbutton::~rgcbutton() { }

---

Implementation (Some random QWidget

Code:

---

login::login(QWidget *parent) : QWidget(parent, Qt::FramelessWindowHint), ui(new Ui::login)
{
    ui->setupUi(this); move(QApplication::desktop()->geometry().center() - rect().center());
 
    rgcbutton *TT = new rgcbutton(this);
    TT->move(20, 20);
}

---

I'm stuck on this and I don't know what's happening. Your help is very much appreciated. This is the warning I get when I compile without Q_OBJECT. Maybe it helps: rgcbutton.h:0: Warning: No relevant classes found. No output generated.


Regards,
Sir Rogers

I have no idea why, but adding another widget into the rgcbutton class solves the problem:

QWidget *randomWidget;
randomWidget = new QWidget(this);

This really doesn't make sense.

Your code doesn't make much sense either ;) Use QLabel with QPixmap instead of your class.

I narrowed it down to a basic level so it was easier to read. I'm using it to create a button with images. I need the mouseMoveEvent for that.

But you don't need the stylesheet part. Having a paint event instead is better. So is defining sizeHint().

Could you please explain in code what you mean? I'm not following.

Open up Qt Assistant and type in "paintEvent", then read the page about QWidget that pops up.