[SOLVED]Object::connect: No such slot...

Alterah

Hello, I have been slowly working on a program and I am running into this particular issue. I am using Qt Creator on Windows XP.

Here's the code:

usernamepopup.h
@
#ifndef USERNAMEPOPUP_H
#define USERNAMEPOPUP_H

#include <QtGui>
#include <QWidget>

class UsernamePopup : public QWidget
{
Q_OBJECT
public:
UsernamePopup();

protected:
QLabel *mIntroText;
QLineEdit *mUsernameEntry;
QLineEdit *mPasswordEntry;
QLineEdit *mPasswordCheckEntry;

void handleCancelClicked();
void handleOkClicked();

};

#endif // USERNAMEPOPUP_H
@

usernamepopup.cpp (I've removed some extra widgets to make this easier to view. I can post full code, but think this will be easier to view)

@
#include "usernamepopup.h"

UsernamePopup::UsernamePopup()
{
//Set size
const int WIDTH = 300;
const int HEIGHT = 180;

int screenWidth;
int screenHeight;

QDesktopWidget *desktop = new QDesktopWidget;

//Get size of the "first" monitor. This will ensure
//the window is displayed centered on the primary monitor
screenWidth = desktop->screenGeometry(0).width();
screenHeight = desktop->screenGeometry(0).height();

QPushButton *mOkButton = new QPushButton("OK");
mOkButton->setFixedHeight(30);
mOkButton->setFixedWidth(75);
connect(mOkButton, SIGNAL(clicked()), this, SLOT(handleOkClicked()));

QPushButton *mCancelButton = new QPushButton("Cancel");
mCancelButton->setFixedHeight(30);
mCancelButton->setFixedWidth(75);
connect(mCancelButton, SIGNAL(clicked()), qApp, SLOT(quit()));

QVBoxLayout *mMainLayout = new QVBoxLayout();
mMainLayout->setAlignment(Qt::AlignTop);

QHBoxLayout *mButtonLayout = new QHBoxLayout();
mButtonLayout->addWidget(mOkButton);
mButtonLayout->addWidget(mCancelButton);

mMainLayout->addLayout(mButtonLayout);

setLayout(mMainLayout);

//set size
resize(WIDTH, HEIGHT);

//center window
move((screenWidth - WIDTH) / 2, (screenHeight - HEIGHT) / 2);

setWindowFlags( Qt::WindowStaysOnTopHint );

}

void UsernamePopup::handleOkClicked()
{
QString username;
QString password;

username = mUsernameEntry->text();

if(mPasswordEntry->text() == mPasswordCheckEntry->text())
{
    password = mPasswordEntry->text();
    mIntroText->setText("Passwords match!");
}
else
{
    mIntroText->setText("Passwords do not match");
}

}
@

I am not sure what is going on here. I've tried running qMake beforehand but that seems to have no effect. Thanks for any help.

tobias.hunger

So what is the exact error message you get?

giesbert

Hi,

the error is in your header file, you have not declared the slots to be slots:

@
#ifndef USERNAMEPOPUP_H
#define USERNAMEPOPUP_H

#include <QtGui>
#include <QWidget>

class UsernamePopup : public QWidget
{
Q_OBJECT
public:
UsernamePopup();

protected:
QLabel *mIntroText;
QLineEdit *mUsernameEntry;
QLineEdit *mPasswordEntry;
QLineEdit *mPasswordCheckEntry;

protected slots: // <-- this was missing
void handleCancelClicked();
void handleOkClicked();
};

#endif // USERNAMEPOPUP_H
@

For the next time, you should also describe your problem in the text, pehaps with a full error message :-)

Alterah

Whoops. Sorry for not including the exact error message. And, thank you for your assistance. I did not realize you had to declare the slots to be slots. Thanks again.