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# window.cpp Example File
widgets/lineedits/window.cpp

        #include <QtGui>

        #include "window.h"

        Window::Window()
        {
            QGroupBox *echoGroup = new QGroupBox(tr("Echo"), this);

            QLabel *echoLabel = new QLabel(tr("Mode:"), echoGroup);
            QComboBox *echoComboBox = new QComboBox(echoGroup);
            echoComboBox->addItem(tr("Normal"));
            echoComboBox->addItem(tr("Password"));
            echoComboBox->addItem(tr("No Echo"));

            echoLineEdit = new QLineEdit(echoGroup);
            echoLineEdit->setFocus();

            QGroupBox *validatorGroup = new QGroupBox(tr("Validator"), this);

            QLabel *validatorLabel = new QLabel(tr("Type:"), validatorGroup);
            QComboBox *validatorComboBox = new QComboBox(validatorGroup);
            validatorComboBox->addItem(tr("No validator"));
            validatorComboBox->addItem(tr("Integer validator"));
            validatorComboBox->addItem(tr("Double validator"));

            validatorLineEdit = new QLineEdit(validatorGroup);

            QGroupBox *alignmentGroup = new QGroupBox(tr("Alignment"), this);

            QLabel *alignmentLabel = new QLabel(tr("Type:"), alignmentGroup);
            QComboBox *alignmentComboBox = new QComboBox(alignmentGroup);
            alignmentComboBox->addItem(tr("Left"));
            alignmentComboBox->addItem(tr("Centered"));
            alignmentComboBox->addItem(tr("Right"));

            alignmentLineEdit = new QLineEdit(alignmentGroup);

            QGroupBox *inputMaskGroup = new QGroupBox(tr("Input mask"), this);

            QLabel *inputMaskLabel = new QLabel(tr("Type:"), inputMaskGroup);
            QComboBox *inputMaskComboBox = new QComboBox(inputMaskGroup);
            inputMaskComboBox->addItem(tr("No mask"));
            inputMaskComboBox->addItem(tr("Phone number"));
            inputMaskComboBox->addItem(tr("ISO date"));
            inputMaskComboBox->addItem(tr("License key"));

            inputMaskLineEdit = new QLineEdit(inputMaskGroup);

            QGroupBox *accessGroup = new QGroupBox(tr("Access"), this);

            QLabel *accessLabel = new QLabel(tr("Read-only:"), accessGroup);
            QComboBox *accessComboBox = new QComboBox(accessGroup);
            accessComboBox->addItem(tr("False"));
            accessComboBox->addItem(tr("True"));

            accessLineEdit = new QLineEdit(accessGroup);

            connect(echoComboBox, SIGNAL(activated(int)),
                    this, SLOT(slotEchoChanged(int)));
            connect(validatorComboBox, SIGNAL(activated(int)),
                    this, SLOT(slotValidatorChanged(int)));
            connect(alignmentComboBox, SIGNAL(activated(int)),
                    this, SLOT(slotAlignmentChanged(int)));
            connect(inputMaskComboBox, SIGNAL(activated(int)),
                    this, SLOT(slotInputMaskChanged(int)));
            connect(accessComboBox, SIGNAL(activated(int)),
                    this, SLOT(slotAccessChanged(int)));

            QGridLayout *echoLayout = new QGridLayout(echoGroup);
            echoLayout->addWidget(echoLabel, 0, 0);
            echoLayout->addWidget(echoComboBox, 0, 1);
            echoLayout->addWidget(echoLineEdit, 1, 0, 1, 2);

            QGridLayout *validatorLayout = new QGridLayout(validatorGroup);
            validatorLayout->addWidget(validatorLabel, 0, 0);
            validatorLayout->addWidget(validatorComboBox, 0, 1);
            validatorLayout->addWidget(validatorLineEdit, 1, 0, 1, 2);

            QGridLayout *alignmentLayout = new QGridLayout(alignmentGroup);
            alignmentLayout->addWidget(alignmentLabel, 0, 0);
            alignmentLayout->addWidget(alignmentComboBox, 0, 1);
            alignmentLayout->addWidget(alignmentLineEdit, 1, 0, 1, 2);

            QGridLayout *inputMaskLayout = new QGridLayout(inputMaskGroup);
            inputMaskLayout->addWidget(inputMaskLabel, 0, 0);
            inputMaskLayout->addWidget(inputMaskComboBox, 0, 1);
            inputMaskLayout->addWidget(inputMaskLineEdit, 1, 0, 1, 2);

            QGridLayout *accessLayout = new QGridLayout(accessGroup);
            accessLayout->addWidget(accessLabel, 0, 0);
            accessLayout->addWidget(accessComboBox, 0, 1);
            accessLayout->addWidget(accessLineEdit, 1, 0, 1, 2);

            QVBoxLayout *layout = new QVBoxLayout(this);
            layout->addWidget(echoGroup);
            layout->addWidget(validatorGroup);
            layout->addWidget(alignmentGroup);
            layout->addWidget(inputMaskGroup);
            layout->addWidget(accessGroup);

            setWindowTitle(tr("Line Edits"));
        }

        void Window::slotEchoChanged(int index)
        {
            switch (index) {
                case 0:
                    echoLineEdit->setEchoMode(QLineEdit::Normal);
                    break;
                case 1:
                    echoLineEdit->setEchoMode(QLineEdit::Password);
                    break;
                case 2:
                    echoLineEdit->setEchoMode(QLineEdit::NoEcho);
                    break;
                }
        }

        void Window::slotValidatorChanged(int index)
        {
            switch (index) {
                case 0:
                    validatorLineEdit->setValidator(0);
                    break;
                case 1:
                    validatorLineEdit->setValidator(new QIntValidator(
                        validatorLineEdit));
                    break;
                case 2:
                    validatorLineEdit->setValidator(new QDoubleValidator(-999.0,
                        999.0, 2, validatorLineEdit));
                    break;
            }

            validatorLineEdit->setText("");
        }

        void Window::slotAlignmentChanged(int index)
        {
            switch (index) {
                case 0:
                    alignmentLineEdit->setAlignment(Qt::AlignLeft);
                    break;
                case 1:
                    alignmentLineEdit->setAlignment(Qt::AlignCenter);
                    break;
                case 2:
                    alignmentLineEdit->setAlignment(Qt::AlignRight);
                    break;
                }
        }

        void Window::slotInputMaskChanged(int index)
        {
            switch (index) {
                case 0:
                    inputMaskLineEdit->setInputMask(QString::null);
                    break;
                case 1:
                    inputMaskLineEdit->setInputMask("+99 99 99 99 99;_");
                    break;
                case 2:
                    inputMaskLineEdit->setInputMask("0000-00-00");
                    inputMaskLineEdit->setText("00000000");
                    inputMaskLineEdit->setCursorPosition(0);
                    break;
                case 3:
                    inputMaskLineEdit->setInputMask(">AAAAA-AAAAA-AAAAA-AAAAA-AAAAA;#");
                    break;
            }
        }

        void Window::slotAccessChanged(int index)
        {
            switch (index) {
            case 0:
                accessLineEdit->setReadOnly(false);
                break;
            case 1:
                accessLineEdit->setReadOnly(true);
                break;
            }
        }