subclassing QWidget

[BeS]

Hello,

it should be really easy but something just doesn't work and i can't find the problem.

I try to create my own Widget by subclassing QWidget.

For testing i have now removed every code so that the new Widget looks like this:

#ifndef SIGNALWIDGET
#define SIGNALWIDGET
 
#include <QtGui>
#include <QWidget>
 
class SignalWidget : public QWidget
 {
     Q_OBJECT
 
 public:
     SignalWidget(QWidget *parent = 0);
 };
 
 #endif

#ifndef SIGNALWIDGET
#define SIGNALWIDGET

#include <QtGui>
#include <QWidget>

class SignalWidget : public QWidget
 {
     Q_OBJECT

 public:
     SignalWidget(QWidget *parent = 0);
 };

 #endif

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and

#include "signalwidget.h"
 
 
SignalWidget::SignalWidget(QWidget *parent)
    : QWidget(parent)
{
}

#include "signalwidget.h"


SignalWidget::SignalWidget(QWidget *parent)
    : QWidget(parent)
{
}

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i would say that there is nothing which could be wrong.

If i now try to create a instance of this widget in my main application with " SignalWidget sw = new SignalWidget();" i get this error message:

/usr/include/qt4/QtGui/qwidget.h: In copy constructor ‘SignalWidget::SignalWidget(const SignalWidget&)’:
/usr/include/qt4/QtGui/qwidget.h:746: error: ‘QWidget::QWidget(const QWidget&)’ is private
src/signalwidget.h:8: error: within this context
src/robotcontrol.cpp: In constructor ‘RobotControl::RobotControl(QWidget*)â€℠¢:
src/robotcontrol.cpp:14: note: synthesized method ‘SignalWidget::SignalWidget(const SignalWidget&)’ first required here
src/robotcontrol.cpp:14: error: initializing temporary from result of ‘SignalWidget::SignalWidget(QWidget*)â€℠¢
make: *** [robotcontrol.o] Error 1

Does someone has an idea what's wrong?

Thanks!

[Lykurg]

SignalWidget *sw = new SignalWidget();

SignalWidget *sw = new SignalWidget();

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Notice the *. and clean up your directory and rerun qmake and make. Maybe it is caused by old object files.

EDIT: and without Q_OBJECT your example code will work.
EDIT2: Its definitely to late for me! Is a moc-file generated? Sometimes it comes to problems if all is one file...

[BeS]

Thanks! The missing "*" solved all problems!

Damn, i just shouldn't sit that long in front of the computer...