no such slot

[eGamer]

i have declared a slot in the QuarterWidget class like this:

public slots:
void home();

and i tried to make the connection with the clicked() signal of a button on the GUI,
but the connection failed and i read on the output window :

Object::connect: No such slot SIM::Coin3D::Quarter::QuarterWidget::home().
notice that the word "Q_OBJECT" is written at the beginning of the class QuarterWidget.

any help ?

[aamer4yu]

Do you have Q_OBJECT declared in you class ? And can we see the declaration of the class ?

[eGamer]

class QUARTER_DLL_API QuarterWidget : public QGLWidget 
{
  typedef QGLWidget inherited;
  Q_OBJECT
 
public:
  explicit QuarterWidget(QWidget * parent = 0, const QGLWidget * sharewidget = 0, Qt::WindowFlags f = 0);
  explicit QuarterWidget(QGLContext * context, QWidget * parent = 0, const QGLWidget * sharewidget = 0, Qt::WindowFlags f = 0);
  explicit QuarterWidget(const QGLFormat & format, QWidget * parent = 0, const QGLWidget * shareWidget = 0, Qt::WindowFlags f = 0);
  virtual ~QuarterWidget();
 
 
public slots:
  void setHome(void);
  void home();  
 
};

class QUARTER_DLL_API QuarterWidget : public QGLWidget 
{
  typedef QGLWidget inherited;
  Q_OBJECT

public:
  explicit QuarterWidget(QWidget * parent = 0, const QGLWidget * sharewidget = 0, Qt::WindowFlags f = 0);
  explicit QuarterWidget(QGLContext * context, QWidget * parent = 0, const QGLWidget * sharewidget = 0, Qt::WindowFlags f = 0);
  explicit QuarterWidget(const QGLFormat & format, QWidget * parent = 0, const QGLWidget * shareWidget = 0, Qt::WindowFlags f = 0);
  virtual ~QuarterWidget();


public slots:
  void setHome(void);
  void home();  

};

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i tried to debug the QObject::connect() line, and i found that no slot is found.

[shentian]

Does your build process generate a moc_quarterwidget.cpp file? If not, re-run qmake.

[aamer4yu]

And how do you connect ? Can we see the connect code ?
Also did you try rebuilding the whole application ?

[eGamer]

And how do you connect ? Can we see the connect code ?
Also did you try rebuilding the whole application ?

QuarterWidget* viewer = new QuarterWidget();
QPushButton* b = new QPushButton("CLick ME",viewer);
b->setGeometry(0,0,80,40);	
if( !QObject::connect(b,SIGNAL(clicked()),viewer,SLOT(home())) )
		QMessageBox::warning(0,"Error","Failed to Connect Slots Signals");

QuarterWidget* viewer = new QuarterWidget();
QPushButton* b = new QPushButton("CLick ME",viewer);
b->setGeometry(0,0,80,40);	
if( !QObject::connect(b,SIGNAL(clicked()),viewer,SLOT(home())) )
		QMessageBox::warning(0,"Error","Failed to Connect Slots Signals");

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also i have rebuild the whole SOLUTION.

[nish]

Object::connect: No such slot SIM::Coin3D::Quarter::QuarterWidget::home().

you first posted this error. so how many classes this class is inheriting?

[eGamer]

you first posted this error. so how many classes this class is inheriting?

QuarterWidget only inherits from QGLWidget, but what you see is the namespaces.

[nish]

if all other slots of the class are working then try to rename the slot(wild guess i know). can u call this slot directly?

[eGamer]

if all other slots of the class are working then try to rename the slot(wild guess i know). can u call this slot directly?

no your advice is not "wild guess" because simply you solved my problem.

thank you very much, as i tried to call this slot the compiler showed "unresolved external"
though i was writing its implementation, then i discovered that there is an old version
of dll that visual studio is still binding to it, i simply deleted it and re-bind with the
new dll and everything is ok.

Thank You Very Much.

[eGamer]

for sure and also i found the home() slot found in qt_metacall(...) method inside
moc_QuarterWidget.cpp.


but as i make the connection it returns false, i don't know why.