Can not access the QLineEdit text within the QDialog

[baluk]

Hi,

There is no use of "func()" it was included by mistake. I have included the line "Dname->exec();", But i get the error "the class has no member named exec(). I am trying to understand the second method.

Thank you,
Baluk

[Lykurg]

There is but

name::name(QWidget *parent) :
    QObject(parent)

name::name(QWidget *parent) :
    QObject(parent)

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should be

name::name(QWidget *parent) :
    QDialog(parent)

name::name(QWidget *parent) :
    QDialog(parent)

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like you have declared it.

[tbscope]

name::name(QWidget *parent) :
    QObject(parent)

name::name(QWidget *parent) :
    QObject(parent)

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Is wrong. You need to inherit from QDialog to get the exec() function.

[Zlatomir]

Use show() in the place for exec() (QMainWindow doesn't have exec() only QDialog has) and use setWindowModality(...) to make it Modal if you really need a modal window.

[baluk]

Hi,

Now I got it working very fine . I am thankful to all of you especially to Lykurg for bearing me .

Thank you,
Baluk

[rickrvo]

Hi,

I'm having a similar problem over a week... I tried everything... Created an Ui Form, created that form on code and both ways I can't get the QLineEdit to show it's text() value.

Everything compiles fine and when running a function within the same class a the Widget was created, I keep getting an empty string when something is written on the lineEdit field on this function here:

void teacherChatMain::returnPressedFunc()
{
    QString text = lineEdit->text();   //allways returns ""
    if (text.isEmpty())
        return;
...
}

void teacherChatMain::returnPressedFunc()
{
    QString text = lineEdit->text();   //allways returns ""
    if (text.isEmpty())
        return;
...
}

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here is my constructor: (this is a plugin, I'll post 1st the mainWindow code then the plug in code)

//MainWindow code

bool mainWindow::instantiateTeacherChatPlugin( QObject * plugin )
{
iTChat = qobject_cast<ITeacherChat *>( plugin );
if(iTChat)
{
iTChat->initialize();
iTChat->setParentWidget(this);
m_iTChat = plugin;
chatTimerPull = new QTimer();
return true;
}
return false;
}

void teacherChatMain::initialize( void )
{
    scrollArea = new QScrollArea();
}
 
void teacherChatMain::startWorking( void )
{
    winChatWidget = new QWidget;
    winChatWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    winChatWidget->setMaximumWidth(350);
 
    gridLayout = new QGridLayout;
 
    stuNameLbl = new QLabel("",winChatWidget);
    stuNameLbl->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
    stuNameLbl->setMinimumSize(368,20);
 
    gridLayout->addWidget(stuNameLbl, 0, 0, 0, 1);
 
    closeBt = new QPushButton(winChatWidget);
    closeBt->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
    closeBt->setFixedSize(20, 20);
 
    closeBt->setIcon(QIcon(":/resources/cancelar.png"));
    closeBt->setIconSize(QSize(16, 16));
 
    gridLayout->addWidget(closeBt, 0, 2);
 
    textEdit = new QTextEdit(winChatWidget);
    textEdit->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    textEdit->setFocusPolicy(Qt::NoFocus);
    textEdit->setMinimumSize(394,450);
 
    gridLayout->addWidget(textEdit, 1, 0, 1, 1);
 
    messageLbl = new QLabel(tr("Mensagem: "),winChatWidget);
    messageLbl->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
    messageLbl->setMinimumWidth(80);
    messageLbl->setMaximumWidth(80);
    gridLayout->addWidget(messageLbl, 2, 0);
 
    lineEdit = new QLineEdit(winChatWidget);
    messageLbl->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
    lineEdit->setFocusPolicy(Qt::StrongFocus);
    lineEdit->setMinimumSize(307,20);
    gridLayout->addWidget(lineEdit, 2, 1);
 
    closeBt->setVisible(false);
    stuNameLbl->setVisible(false);
 
    tableFormat.setBorder(0);
 
    connect(lineEdit, SIGNAL(returnPressed()), this, SLOT(returnPressedFunc()));
 
 
    winChatWidget->setLayout(gridLayout);
    setTeacherName(_parent->getTeacherName());
 
    setActive(false);
 
    connect(this, SIGNAL(newMessage(QString,QString)),
            this, SLOT(appendMessage(QString,QString)));
 
    stGridDlg = new studentsGridDialog(this, studentsScrollArea,_parent->getLoggedStudents(), _parent->getTeacherName(), windowChatScrollArea);
    QObject::connect(stGridDlg, SIGNAL(newMessageReceived()), this, SLOT(newMessageReceived()));
    connect(this, SIGNAL(returnPressedMsg(QString, QString)), stGridDlg, SIGNAL(returnPressedSignal(QString, QString)));
 
 
    contentsLayout->addWidget(studentsScrollArea,0,0);
    contentsLayout->addWidget(winChatWidget,0,1);
 
    scrollArea->setLayout(contentsLayout);
}

void teacherChatMain::initialize( void )
{
    scrollArea = new QScrollArea();
}

void teacherChatMain::startWorking( void )
{
    winChatWidget = new QWidget;
    winChatWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    winChatWidget->setMaximumWidth(350);

    gridLayout = new QGridLayout;

    stuNameLbl = new QLabel("",winChatWidget);
    stuNameLbl->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
    stuNameLbl->setMinimumSize(368,20);

    gridLayout->addWidget(stuNameLbl, 0, 0, 0, 1);

    closeBt = new QPushButton(winChatWidget);
    closeBt->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
    closeBt->setFixedSize(20, 20);

    closeBt->setIcon(QIcon(":/resources/cancelar.png"));
    closeBt->setIconSize(QSize(16, 16));

    gridLayout->addWidget(closeBt, 0, 2);

    textEdit = new QTextEdit(winChatWidget);
    textEdit->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    textEdit->setFocusPolicy(Qt::NoFocus);
    textEdit->setMinimumSize(394,450);

    gridLayout->addWidget(textEdit, 1, 0, 1, 1);

    messageLbl = new QLabel(tr("Mensagem: "),winChatWidget);
    messageLbl->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
    messageLbl->setMinimumWidth(80);
    messageLbl->setMaximumWidth(80);
    gridLayout->addWidget(messageLbl, 2, 0);

    lineEdit = new QLineEdit(winChatWidget);
    messageLbl->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
    lineEdit->setFocusPolicy(Qt::StrongFocus);
    lineEdit->setMinimumSize(307,20);
    gridLayout->addWidget(lineEdit, 2, 1);

    closeBt->setVisible(false);
    stuNameLbl->setVisible(false);

    tableFormat.setBorder(0);

    connect(lineEdit, SIGNAL(returnPressed()), this, SLOT(returnPressedFunc()));


    winChatWidget->setLayout(gridLayout);
    setTeacherName(_parent->getTeacherName());

    setActive(false);

    connect(this, SIGNAL(newMessage(QString,QString)),
            this, SLOT(appendMessage(QString,QString)));

    stGridDlg = new studentsGridDialog(this, studentsScrollArea,_parent->getLoggedStudents(), _parent->getTeacherName(), windowChatScrollArea);
    QObject::connect(stGridDlg, SIGNAL(newMessageReceived()), this, SLOT(newMessageReceived()));
    connect(this, SIGNAL(returnPressedMsg(QString, QString)), stGridDlg, SIGNAL(returnPressedSignal(QString, QString)));


    contentsLayout->addWidget(studentsScrollArea,0,0);
    contentsLayout->addWidget(winChatWidget,0,1);

    scrollArea->setLayout(contentsLayout);
}

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Please can some one help me? I'm about to try my next step which is throwing the computer out of the window!!!