Need help in Qt code

[doforumda]

hi

I am working on a Qt examples on this link "Your text to link here...":http://doc.trolltech.com/4.6/tutorials-addressbook-part5.html

i write the complete code but it gives me this error

@undefined reference to 'vtable for FindDialog finddialog.cpp 6@

here is my code for finddialog.cpp

@#include <QtGui>

#include "finddialog.h"

FindDialog::FindDialog(QWidget *parent) :
QDialog(parent)
{
QLabel *findLabel = new QLabel(tr("Enter the name of a contact:"));
lineEdit = new QLineEdit;

findButton = new QPushButton(tr("&Find"));
findText = "";

QHBoxLayout *layout = new QHBoxLayout;
layout->addWidget(findLabel);
layout->addWidget(lineEdit);
layout->addWidget(findButton);
setLayout(layout);
setWindowTitle(tr("Find Contact"));

connect(findButton, SIGNAL(clicked()), this, SLOT(findClicked()));
connect(findButton, SIGNAL(clicked()), this, SLOT(accept()));

}

void FindDialog::findClicked()
{
QString text = lineEdit->text();

if(text.isEmpty()) {
    QMessageBox::information(this, tr("Empty Field"),
                             tr("Please Enter a name."));
    return;
}
findText = text;
lineEdit->clear();
hide();

}

QString FindDialog::getFindText()
{
return findText;
}
@

and here is finddialog.h

@#ifndef FINDDIALOG_H

#define FINDDIALOG_H

#include <QDialog>

class QLineEdit;
class QPushButton;

class FindDialog : public QDialog
{
Q_OBJECT
public:
FindDialog(QWidget *parent = 0);
QString getFindText();

public slots:
void findClicked();

private:
QPushButton *findButton;
QLineEdit *lineEdit;
QString findText;
};

#endif // FINDDIALOG_H
@

[DenisKormalev]

Try to clean and rebuild it. At first view code looks ok

[doforumda]

still same error

from Build Menu i select "clean all" and then Run it but same error

[jryannel]

Seems you need to run qmake again. If you use QtCreator, right click on project and select "Run qmake".

The missing vtable comes from the issue you have the Q_OBJECT macro included, but qmake has not flagged the class for meta-object compilation (moc). Running qmake will add the class to the list of "I need moc" items.

[doforumda]

thanks it works

[bc913]

Hi,

I am working on the same example with QT 4.8.4 and QT Creator 2.6.2. When I run it, several errors including the followings occur. I have tried all the ways from the forum but I haven't fixed.

I have cleaned the project, rebuild and run qmake. But, it doesn't solve. Any help is appreciated.

Regards,

1. error: C2628: 'FindDialog' followed by 'int' is illegal (did you forget a ';'?)
2. error: C3874: return type of 'main' should be 'int' instead of 'FindDialog'
3. error: C2664: 'FindDialog::FindDialog(QWidget *)' : cannot convert parameter 1 from 'int' to 'QWidget *'
4. Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast

@//finddialog.cpp
#include <QtGui>
#include "FindDialog.h"

FindDialog::FindDialog(QWidget *parent)
: QDialog(parent){
label = new QLabel(tr("Find &what: "));
lineEdit = new QLineEdit;
label->setBuddy(lineEdit);

caseCheckBox = new QCheckBox(tr("Match &case"));
backwardCheckBox = new QCheckBox(tr("Search &Backward"));

findButton = new QPushButton(tr("&Find"));
findButton->setDefault(true);
findButton->setEnabled(false);

closeButton = new QPushButton(tr("Close"));

connect(lineEdit, SIGNAL(textChanged(QString &)),this, SLOT(enableFindButton(QString &)));
connect(findButton, SIGNAL(clicked()), this, SLOT(findclicked()));
connect(closeButton, SIGNAL(clicked()), this, SLOT(close()));

QHBoxLayout *topLeftLayout = new QHBoxLayout;
topLeftLayout->addWidget(label);
topLeftLayout->addWidget(lineEdit);

QVBoxLayout *leftLayout = new QVBoxLayout;
leftLayout->addLayout(topLeftLayout);
leftLayout->addWidget(caseCheckBox);
leftLayout->addWidget(backwardCheckBox);

QVBoxLayout *rightLayout = new QVBoxLayout;
rightLayout->addWidget(findButton);
rightLayout->addWidget(closeButton);
rightLayout->addStretch();

QHBoxLayout *mainLayout = new QHBoxLayout;
mainLayout->addLayout(leftLayout);
mainLayout->addLayout(rightLayout);
setLayout(mainLayout);

setWindowTitle(tr("Find"));
setFixedHeight(sizeHint().height());

}

void FindDialog::findClicked() // kullanici find butonunu tıkladığında calisir
{
QString text = lineEdit->text();

Qt::CaseSensitivity cs = caseCheckBox->isChecked() ? Qt::CaseSensitive : Qt::CaseInsensitive;

if (backwardCheckBox->isChecked()) { //backward Checkbox secili ise findPrevious sinyali yayar
    emit findPrevious(text, cs);}
else {
    emit findNext(text, cs);}

}

void FindDialog::enableFindButton(const QString &text) // satır editöründe metin degisiligi olunca finbutton calistirilir...
{
findButton->setEnabled(!text.isEmpty());
}@

@//finddialog.h
#ifndef FINDDIALOG_H
#define FINDDIALOG_H

#include <QDialog>

class QCheckbox;
class QLabel;
class QLineEdit;
class QPushButton;

class FindDialog : public QDialog
{
Q_OBJECT

public:
FindDialog (QWidget *parent = 0);
signals: // sinyal bildirimleri
void findNext(const QString &str, Qt::CaseSensitivity cs);
void findPrevious(const QString &str, Qt::CaseSensitivity cs);
private slots: // yuva bildirimleri
void findclicked();
void enableFindButton(const QString &text);
private:
QLabel *label;
QLineEdit *lineEdit;
QCheckbox *caseCheckBox;
QCheckbox *backwardCheckBox;
QPushButton *findButton;
QPushButton *closeButton;
}

#endif // FINDDIALOG_H
@

@//main.cpp
#include <QApplication>
#include "FindDialog.h"

int main(int argc, char *argv[])
{

QApplication app(argc, argv);
FindDialog *dialog = new FindDialog;

dialog->show();
return app.exec();

}
@

[iamfrankenstein]

Aren't you suppose to terminate a class definition with ';'?
I don't see that in you header file finddialog.h

That is what the compiler means with "did you forget a ‘;’?"

I'll check in a few hours to see your response if its not the case.

[Rondog]

I think you need to declare and define a destructor

@
FindDialog (QWidget *parent = 0);
~FindDialog(void);
@

If you are using virtual protected functions you should also make the destructor virtual as well.