Inheritance problem

[brevleq]

Hi guys!

I'm trying to use QComboBox as my base class for my ComboView, but I'm having a problem when I try build my program:

hudson@brevleq:~/.projetos/CLP$ make
g++ -c -pipe -O2 -Wall -W -D_REENTRANT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/opt/qt4/mkspecs/linux-g++ -I. -I/opt/qt4/include/QtCore -I/opt/qt4/include/QtCore -I/opt/qt4/include/QtGui -I/opt/qt4/include/QtGui -I/opt/qt4/include -I. -Icontainer -Iporta -Iobserver -Iobserver/events -Igenerator -Icontroller -Iview -Ifrontend -I. -I. -o ComboView.o view/ComboView.cpp
view/ComboView.cpp: In constructor 'ComboView::ComboView(QWidget*)':
view/ComboView.cpp:14: error: no matching function for call to 'ComboView::currentIndexChanged()'
/opt/qt4/include/QtGui/qcombobox.h:230: note: candidates are: void QComboBox::currentIndexChanged(int)
/opt/qt4/include/QtGui/qcombobox.h:231: note: void QComboBox::currentIndexChanged(const QString&)
view/ComboView.cpp:14: error: 'signal' was not declared in this scope
view/ComboView.cpp:14: error: 'slot' was not declared in this scope
make: ** [ComboView.o] Erro 1
hudson@brevleq:~/.projetos/CLP$

I think the inheritance I did is wrong, but I can't find the problem!!
These are the sources:

#ifndef COMBOVIEW_H
#define COMBOVIEW_H
 
#include <QComboBox>
#include <QWidget>
#include "View.h"
#include "PortaEntrada.h"
 
class ComboView : public QComboBox,public View {
	Q_OBJECT
 
	public:
		ComboView(QWidget *parent=0);
 
	protected slots:
		void typeChanged(void);
};
 
#endif

#ifndef COMBOVIEW_H
#define COMBOVIEW_H

#include <QComboBox>
#include <QWidget>
#include "View.h"
#include "PortaEntrada.h"

class ComboView : public QComboBox,public View {
	Q_OBJECT

	public:
		ComboView(QWidget *parent=0);

	protected slots:
		void typeChanged(void);
};

#endif

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#include "ComboView.h"
 
ComboView::ComboView(QWidget *parent):QComboBox(parent){
	addItem("Constante",PortaEntrada::CONSTANT);
	addItem("Triangular",PortaEntrada::TRIANGULAR);
	addItem("Quadratica",PortaEntrada::QUADRATIC);
	QComboBox::connect(this,signal(currentIndexChanged()),this,slot(typeChanged()));
}
 
void ComboView::typeChanged(void){
	controller->setProperty(currentIndex());
}

#include "ComboView.h"

ComboView::ComboView(QWidget *parent):QComboBox(parent){
	addItem("Constante",PortaEntrada::CONSTANT);
	addItem("Triangular",PortaEntrada::TRIANGULAR);
	addItem("Quadratica",PortaEntrada::QUADRATIC);
	QComboBox::connect(this,signal(currentIndexChanged()),this,slot(typeChanged()));
}

void ComboView::typeChanged(void){
	controller->setProperty(currentIndex());
}

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what I did wrong?

[jpn]

It should be "SIGNAL(currentIndexChanged())" and "SLOT(typeChanged())". Notice upper case.

[brevleq]

Good!

I've forgot it!
It's building right now, but when I run the program I have this output at shell:

hudson@brevleq:~/.projetos/CLP$ CLP
Object::connect: No such signal ComboView::QComboBox::currentIndexChanged()
Object::connect: No such signal ComboView::QComboBox::currentIndexChanged()
Object::connect: No such signal ComboView::QComboBox::currentIndexChanged()
Object::connect: No such signal ComboView::QComboBox::currentIndexChanged()
Object::connect: No such signal ComboView::QComboBox::currentIndexChanged()
Object::connect: No such signal ComboView::QComboBox::currentIndexChanged()
Object::connect: No such signal ComboView::QComboBox::currentIndexChanged()
Object::connect: No such signal ComboView::QComboBox::currentIndexChanged()
Object::connect: No such signal ComboView::QComboBox::currentIndexChanged()
Object::connect: No such signal ComboView::QComboBox::currentIndexChanged()
hudson@brevleq:~/.projetos/CLP$

I wanna use QComboBox Signal, can I?? How?? Should I reimplement currentIndexChanged()??

[wysota]

Please post your updated connect() statement. It probably contains SIGNAL(QComboBox::currentIndexChanged()) instead of SIGNAL(currentIndexChanged()).

[brevleq]

#include "ComboView.h"
 
ComboView::ComboView(QWidget *parent):QComboBox(parent){
	addItem("Constante",PortaEntrada::CONSTANT);
	addItem("Triangular",PortaEntrada::TRIANGULAR);
	addItem("Quadratica",PortaEntrada::QUADRATIC);
	connect(this,SIGNAL(currentIndexChanged(&int)),this,SLOT(typeChanged()));
}
 
void ComboView::typeChanged(void){
	controller->setProperty(currentIndex());
}

#include "ComboView.h"

ComboView::ComboView(QWidget *parent):QComboBox(parent){
	addItem("Constante",PortaEntrada::CONSTANT);
	addItem("Triangular",PortaEntrada::TRIANGULAR);
	addItem("Quadratica",PortaEntrada::QUADRATIC);
	connect(this,SIGNAL(currentIndexChanged(&int)),this,SLOT(typeChanged()));
}

void ComboView::typeChanged(void){
	controller->setProperty(currentIndex());
}

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Object::connect: No such signal ComboView::currentIndexChanged(&int)
Object::connect: No such signal ComboView::currentIndexChanged(&int)
Object::connect: No such signal ComboView::currentIndexChanged(&int)
Object::connect: No such signal ComboView::currentIndexChanged(&int)
Object::connect: No such signal ComboView::currentIndexChanged(&int)
Object::connect: No such signal ComboView::currentIndexChanged(&int)
Object::connect: No such signal ComboView::currentIndexChanged(&int)
Object::connect: No such signal ComboView::currentIndexChanged(&int)
Object::connect: No such signal ComboView::currentIndexChanged(&int)
Object::connect: No such signal ComboView::currentIndexChanged(&int)

[aamer4yu]

connect(this,SIGNAL(currentIndexChanged(&int)),thi s,SLOT(typeChanged()));

should be

connect(this,SIGNAL(currentIndexChanged(int)),this,SLOT(typeChanged()));

[yunpeng880]

#include "ComboView.h"
 
ComboView::ComboView(QWidget *parent):QComboBox(parent){
	addItem("Constante",PortaEntrada::CONSTANT);
	addItem("Triangular",PortaEntrada::TRIANGULAR);
	addItem("Quadratica",PortaEntrada::QUADRATIC);
	connect(this,SIGNAL(currentIndexChanged(&int)),this,SLOT(typeChanged()));
}
 
void ComboView::typeChanged(void){
	controller->setProperty(currentIndex());
}

#include "ComboView.h"

ComboView::ComboView(QWidget *parent):QComboBox(parent){
	addItem("Constante",PortaEntrada::CONSTANT);
	addItem("Triangular",PortaEntrada::TRIANGULAR);
	addItem("Quadratica",PortaEntrada::QUADRATIC);
	connect(this,SIGNAL(currentIndexChanged(&int)),this,SLOT(typeChanged()));
}

void ComboView::typeChanged(void){
	controller->setProperty(currentIndex());
}

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parent class have no currentIndexChanged signal, i think