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window.cpp Example File
widgets/spinboxes/window.cpp

    #include <QtGui>

    #include "window.h"

    Window::Window()
    {
        createSpinBoxes();
        createDateTimeEdits();
        createDoubleSpinBoxes();

        QHBoxLayout *layout = new QHBoxLayout(this);
        layout->addWidget(spinBoxesGroup);
        layout->addWidget(editsGroup);
        layout->addWidget(doubleSpinBoxesGroup);

        setWindowTitle(tr("Spinboxes"));
    }

    void Window::createSpinBoxes()
    {
        spinBoxesGroup = new QGroupBox(tr("Spinboxes"), this);

        QLabel *integerLabel = new QLabel(tr("Enter a value between "
            "%1 and %2:").arg(-20).arg(20), spinBoxesGroup);
        QSpinBox *integerSpinBox = new QSpinBox(spinBoxesGroup);
        integerSpinBox->setRange(-20, 20);
        integerSpinBox->setSingleStep(1);
        integerSpinBox->setValue(0);

        QLabel *zoomLabel = new QLabel(tr("Enter a zoom value between "
            "%1 and %2:").arg(0).arg(1000), spinBoxesGroup);
        QSpinBox *zoomSpinBox = new QSpinBox(spinBoxesGroup);
        zoomSpinBox->setRange(0, 1000);
        zoomSpinBox->setSingleStep(10);
        zoomSpinBox->setSuffix(" %");
        zoomSpinBox->setSpecialValueText(tr("Automatic"));
        zoomSpinBox->setValue(100);

        QLabel *priceLabel = new QLabel(tr("Enter a price between "
            "%1 and %2:").arg(0).arg(999), spinBoxesGroup);
        QSpinBox *priceSpinBox = new QSpinBox(spinBoxesGroup);
        priceSpinBox->setRange(0, 999);
        priceSpinBox->setSingleStep(1);
        priceSpinBox->setPrefix("$");
        priceSpinBox->setValue(99);

        QVBoxLayout *spinBoxLayout = new QVBoxLayout(spinBoxesGroup);
        spinBoxLayout->addWidget(integerLabel);
        spinBoxLayout->addWidget(integerSpinBox);
        spinBoxLayout->addWidget(zoomLabel);
        spinBoxLayout->addWidget(zoomSpinBox);
        spinBoxLayout->addWidget(priceLabel);
        spinBoxLayout->addWidget(priceSpinBox);
    }

    void Window::createDateTimeEdits()
    {
        editsGroup = new QGroupBox(tr("Date and time spin boxes"), this);

        QLabel *dateLabel = new QLabel(tr("Appointment date:"), editsGroup);
        QDateTimeEdit *dateEdit = new QDateTimeEdit(QDate::currentDate(),
                                                    editsGroup);
        dateEdit->setDateRange(QDate(2005, 1, 1), QDate(2010, 12, 31));

        QLabel *timeLabel = new QLabel(tr("Appointment time:"), editsGroup);
        QDateTimeEdit *timeEdit = new QDateTimeEdit(QTime::currentTime(),
                                                    editsGroup);
        timeEdit->setTimeRange(QTime(9, 0, 0, 0), QTime(16, 30, 0, 0));

        QLabel *meetingLabel = new QLabel(tr("Meeting date and time:"),
                                           editsGroup);
        meetingEdit = new QDateTimeEdit(QDateTime::currentDateTime(), editsGroup);
        meetingEdit->setDateRange(QDate(2004, 11, 1), QDate(2005, 11, 30));
        meetingEdit->setTimeRange(QTime(0, 0, 0, 0), QTime(23, 59, 59, 999));

        QLabel *formatLabel = new QLabel(tr("Format string for the meeting date "
            "and time:"), editsGroup);

        QComboBox *formatComboBox = new QComboBox(editsGroup);
        formatComboBox->insertItem("yyyy-MM-dd hh:mm:ss (zzz ms)");
        formatComboBox->insertItem("hh:mm:ss MM/dd/yyyy");
        formatComboBox->insertItem("hh:mm:ss dd/MM/yyyy");
        formatComboBox->insertItem("hh:mm:ss");
        formatComboBox->insertItem("hh:mm ap");

        connect(formatComboBox, SIGNAL(activated(const QString &)),
                this, SLOT(setFormatString(const QString &)));

        QVBoxLayout *editsLayout = new QVBoxLayout(editsGroup);
        editsLayout->addWidget(dateLabel);
        editsLayout->addWidget(dateEdit);
        editsLayout->addWidget(timeLabel);
        editsLayout->addWidget(timeEdit);
        editsLayout->addWidget(meetingLabel);
        editsLayout->addWidget(meetingEdit);
        editsLayout->addWidget(formatLabel);
        editsLayout->addWidget(formatComboBox);
    }

    void Window::setFormatString(const QString &formatString)
    {
        meetingEdit->setFormat(formatString);
    }

    void Window::createDoubleSpinBoxes()
    {
        doubleSpinBoxesGroup = new QGroupBox(tr("Double precision spinboxes"), this);

        QLabel *precisionLabel = new QLabel(tr("Number of decimal places to show:"),
                                            doubleSpinBoxesGroup);
        QSpinBox *precisionSpinBox = new QSpinBox(doubleSpinBoxesGroup);
        precisionSpinBox->setRange(0, 14);
        precisionSpinBox->setValue(2);

        QLabel *doubleLabel = new QLabel(tr("Enter a value between "
            "%1 and %2:").arg(-20).arg(20), doubleSpinBoxesGroup);
        doubleSpinBox = new QDoubleSpinBox(doubleSpinBoxesGroup);
        doubleSpinBox->setRange(-20.0, 20.0);
        doubleSpinBox->setSingleStep(1.0);
        doubleSpinBox->setValue(0.0);

        QLabel *scaleLabel = new QLabel(tr("Enter a scale factor between "
            "%1 and %2:").arg(0).arg(1000.0), doubleSpinBoxesGroup);
        scaleSpinBox = new QDoubleSpinBox(doubleSpinBoxesGroup);
        scaleSpinBox->setRange(0.0, 1000.0);
        scaleSpinBox->setSingleStep(10.0);
        scaleSpinBox->setSuffix(" %");
        scaleSpinBox->setSpecialValueText(tr("No scaling"));
        scaleSpinBox->setValue(100.0);

        QLabel *priceLabel = new QLabel(tr("Enter a price between "
            "%1 and %2:").arg(0).arg(1000), doubleSpinBoxesGroup);
        priceSpinBox = new QDoubleSpinBox(doubleSpinBoxesGroup);
        priceSpinBox->setRange(0.0, 1000.0);
        priceSpinBox->setSingleStep(1.0);
        priceSpinBox->setPrefix("$");
        priceSpinBox->setValue(99.99);

        connect(precisionSpinBox, SIGNAL(valueChanged(int)),
                this, SLOT(changePrecision(int)));

        QVBoxLayout *spinBoxLayout = new QVBoxLayout(doubleSpinBoxesGroup);
        spinBoxLayout->addWidget(precisionLabel);
        spinBoxLayout->addWidget(precisionSpinBox);
        spinBoxLayout->addWidget(doubleLabel);
        spinBoxLayout->addWidget(doubleSpinBox);
        spinBoxLayout->addWidget(scaleLabel);
        spinBoxLayout->addWidget(scaleSpinBox);
        spinBoxLayout->addWidget(priceLabel);
        spinBoxLayout->addWidget(priceSpinBox);
    }

    void Window::changePrecision(int precision)
    {
        doubleSpinBox->setPrecision(precision);
        scaleSpinBox->setPrecision(precision);
        priceSpinBox->setPrecision(precision);
    }


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Qt 4.0.0-b1