QLineEdit crashing on recovering data

[Dummie1138]

Hi. I have the following code.

code.c

void TestConfig::on_pushButton_New_clicked()
{
 inputBox = new QDialog(this);
    //Set size of QDialog.
    QGridLayout *gridLayout = new QGridLayout(this);
    inputBox->setLayout(gridLayout);

    //QLabel
    QLabel *boxText = new QLabel(this);
    boxText->setText("Input new test presets:");
    boxText->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Minimum);
    boxText->setAlignment(Qt::AlignCenter);
    gridLayout->addWidget(boxText, 0, 0, 1, 2, Qt::AlignCenter);

    //Add a QLineEdit
    nameInput = new QLineEdit;
    gridLayout->addWidget(nameInput, 1, 1);

   //Add a QLineEdit
    startTempInput = new QLineEdit;
    gridLayout->addWidget(startTempInput, 2, 1);

    QLineEdit *expFlashptInput = new QLineEdit;
    gridLayout->addWidget(expFlashptInput, 3, 1);

    //Add a QDialogButtonBox
    QDialogButtonBox *boxButton = new QDialogButtonBox(QDialogButtonBox::Ok, this);
    gridLayout->addWidget(boxButton, 4, 0, 1, 2, Qt::AlignCenter);
    //Read information
    connect(boxButton, SIGNAL(accepted()), this, SLOT(setTestConfig()));
    connect(boxButton, SIGNAL(accepted()), inputBox, SLOT(accept()));
}

void TestConfig::setTestConfig(){
    qDebug() << "In sTestC";
    int startTemp = startTempInput->text().toInt();
    int expFlashptTemp = expFlashptInput->text().toInt();
    qDebug() << startTemp;
    qDebug() << endTemp;
    ConfigLibrarian librarian;
    ConfigurationSet config;
    config.name = nameInput->text();
    config.serialNum = "desktop";
    config.startTemp = startTempInput->text().toInt();
    config.endTemp = 86;
    config.tempRate = 5.5;
    config.igniteFreq = 10;
    config.pressureThresh = 20;
    config.minTempAboveIni = 10;
}

code.h

namespace Ui {
class TestConfig;
}

class TestConfig : public QDialog
{
    Q_OBJECT

private slots:
    void setTestConfig();

private:
    QDialog *inputBox;
    QLineEdit *nameInput, *startTempInput, *expFlashptInput;
};

I am crashing at this line:
int startTemp = startTempInput->text().toInt();
I am unsure why my function cannot return the values given at startTempInput, as it should still exist. Please let me know if more information is required.

[Christian Ehrlicher]

@Dummie1138 said in QLineEdit crashing on recovering data:

startTempInput

And where do you initialize this variable (and the other QLineEdit pointers)?

[Dummie1138]

@Christian-Ehrlicher I have somehow failed to notice that in my attempt to reduce code fluff for this question I had deleted the critical elements. Thanks for bringing this up, I have re-edited the original code accordingly.

The full code.cpp:

void TestConfig::on_pushButton_New_clicked()
{
    inputBox = new QDialog(this);
    //Set size of QDialog.
    inputBox->resize(450, 160);
    inputBox->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
    inputBox->setStyleSheet("font: 20px; color: navy; border: none; outline: none;");
    inputBox->setWindowFlag(Qt::WindowContextHelpButtonHint, false);
    QGridLayout *gridLayout = new QGridLayout(this);
    inputBox->setLayout(gridLayout);

    //QLabel
    QLabel *boxText = new QLabel(this);
    boxText->setText("Input new test presets:");
    boxText->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Minimum);
    boxText->setAlignment(Qt::AlignCenter);
    gridLayout->addWidget(boxText, 0, 0, 1, 2, Qt::AlignCenter);

    //Add a QLineEdit
    nameInput = new QLineEdit;
    gridLayout->addWidget(nameInput, 1, 1);

    //QLabel
    QLabel *nameText = new QLabel(this);
    nameText->setText("Name:");
    nameText->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Minimum);
    nameText->setAlignment(Qt::AlignLeft);
    gridLayout->addWidget(nameText, 1, 0);

    //Add a QLineEdit
    startTempInput = new QLineEdit;
    gridLayout->addWidget(startTempInput, 2, 1);

    //QLabel
    QLabel *startTempText = new QLabel(this);
    startTempText->setText("Start temp:");
    startTempText->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Minimum);
    startTempText->setAlignment(Qt::AlignLeft);
    gridLayout->addWidget(startTempText, 2, 0);

    //Add a QLineEdit
    QLineEdit *expFlashptInput = new QLineEdit;
    gridLayout->addWidget(expFlashptInput, 3, 1);

    //QLabel
    QLabel *expFlashptText = new QLabel(this);
    expFlashptText->setText("Expected flashpt:");
    expFlashptText->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Minimum);
    expFlashptText->setAlignment(Qt::AlignLeft);
    gridLayout->addWidget(expFlashptText, 3, 0);

    //Add a QDialogButtonBox
    QDialogButtonBox *boxButton = new QDialogButtonBox(QDialogButtonBox::Ok, this);
    boxButton->setStyleSheet("QPushButton {border: 2px solid #8f8f91;border-radius: 9px;background-color: QLinearGradient(x1: 0, y1: 0, x2: 0, y2: 1,stop: 0 #f6f7fa, stop: 1 #dadbde);font: 25px;outline: none;}"
    "QPushButton:pressed {background-color: QLinearGradient(x1: 0, y1: 0, x2: 0, y2: 1,stop: 0 #dadbde, stop: 1 #f6f7fa) }");
    boxButton->findChild<QPushButton *>()->setMinimumSize(80, 50);
    gridLayout->addWidget(boxButton, 4, 0, 1, 2, Qt::AlignCenter);
    //Read information
    connect(boxButton, SIGNAL(accepted()), this, SLOT(setTestConfig()));
    connect(boxButton, SIGNAL(accepted()), inputBox, SLOT(accept()));
    //Connect accepted to a seperate function too
    inputBox->exec();
    qDebug() << "After InputBox";
}

void TestConfig::setTestConfig(){
    qDebug() << "In sTestC";
    int startTemp = startTempInput->text().toInt();
    ConfigLibrarian librarian;
    ConfigurationSet config;
//    config.name = nameInput->text();
    config.serialNum = "desktop";
//    config.startTemp = startTempInput->text().toInt();
    config.endTemp = 86;
    config.tempRate = 5.5;
//    config.expectedFlashpt = expFlashptInput->text().toInt();
    config.igniteFreq = 10;
    config.pressureThresh = 20;
    config.minTempAboveIni = 10;
//    librarian.addConfig(config);
}

[Christian Ehrlicher]

You still don't initialize the member variables, only local ones...

[JonB]

@Dummie1138 Why not run under a debugger and then you will know for yourself why it's crashing?