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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);
        }