window.cpp Example File
^{widgets/spinboxes/window.cpp}

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    ** Copyright (C) 2004-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the documentation of the Qt Toolkit.
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    ** and appearing in the file LICENSE.GPL included in the packaging of
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    #include <QtGui>

    #include "window.h"

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

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

        setWindowTitle(tr("Spin Boxes"));
    }

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

        QLabel *integerLabel = new QLabel(tr("Enter a value between "
            "%1 and %2:").arg(-20).arg(20));
        QSpinBox *integerSpinBox = new QSpinBox;
        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));
        QSpinBox *zoomSpinBox = new QSpinBox;
        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));
        QSpinBox *priceSpinBox = new QSpinBox;
        priceSpinBox->setRange(0, 999);
        priceSpinBox->setSingleStep(1);
        priceSpinBox->setPrefix("$");
        priceSpinBox->setValue(99);

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

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

        QLabel *dateLabel = new QLabel;
        QDateTimeEdit *dateEdit = new QDateTimeEdit(QDate::currentDate());
        dateEdit->setDateRange(QDate(2005, 1, 1), QDate(2010, 12, 31));
        dateLabel->setText(tr("Appointment date (between %0 and %1):")
                           .arg(dateEdit->minimumDate().toString(Qt::ISODate))
                           .arg(dateEdit->maximumDate().toString(Qt::ISODate)));

        QLabel *timeLabel = new QLabel;
        QDateTimeEdit *timeEdit = new QDateTimeEdit(QTime::currentTime());
        timeEdit->setTimeRange(QTime(9, 0, 0, 0), QTime(16, 30, 0, 0));
        timeLabel->setText(tr("Appointment time (between %0 and %1):")
                           .arg(timeEdit->minimumTime().toString(Qt::ISODate))
                           .arg(timeEdit->maximumTime().toString(Qt::ISODate)));

        meetingLabel = new QLabel;
        meetingEdit = new QDateTimeEdit(QDateTime::currentDateTime());

        QLabel *formatLabel = new QLabel(tr("Format string for the meeting date "
                                            "and time:"));
        QComboBox *formatComboBox = new QComboBox;
        formatComboBox->addItem("yyyy-MM-dd hh:mm:ss (zzz 'ms')");
        formatComboBox->addItem("hh:mm:ss MM/dd/yyyy");
        formatComboBox->addItem("hh:mm:ss dd/MM/yyyy");
        formatComboBox->addItem("hh:mm:ss");
        formatComboBox->addItem("hh:mm ap");

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

        setFormatString(formatComboBox->currentText());

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

    void Window::setFormatString(const QString &formatString)
    {
        meetingEdit->setDisplayFormat(formatString);
        if (meetingEdit->displayedSections() & QDateTimeEdit::DateSections_Mask) {
            meetingEdit->setDateRange(QDate(2004, 11, 1), QDate(2005, 11, 30));
            meetingLabel->setText(tr("Meeting date (between %0 and %1):")
                .arg(meetingEdit->minimumDate().toString(Qt::ISODate))
                .arg(meetingEdit->maximumDate().toString(Qt::ISODate)));
        } else {
            meetingEdit->setTimeRange(QTime(0, 7, 20, 0), QTime(21, 0, 0, 0));
            meetingLabel->setText(tr("Meeting time (between %0 and %1):")
                .arg(meetingEdit->minimumTime().toString(Qt::ISODate))
                .arg(meetingEdit->maximumTime().toString(Qt::ISODate)));
        }
    }

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

        QLabel *precisionLabel = new QLabel(tr("Number of decimal places "
                                               "to show:"));
        QSpinBox *precisionSpinBox = new QSpinBox;
        precisionSpinBox->setRange(0, 13);
        precisionSpinBox->setValue(2);

        QLabel *doubleLabel = new QLabel(tr("Enter a value between "
            "%1 and %2:").arg(-20).arg(20));
        doubleSpinBox = new QDoubleSpinBox;
        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));
        scaleSpinBox = new QDoubleSpinBox;
        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));
        priceSpinBox = new QDoubleSpinBox;
        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;
        spinBoxLayout->addWidget(precisionLabel);
        spinBoxLayout->addWidget(precisionSpinBox);
        spinBoxLayout->addWidget(doubleLabel);
        spinBoxLayout->addWidget(doubleSpinBox);
        spinBoxLayout->addWidget(scaleLabel);
        spinBoxLayout->addWidget(scaleSpinBox);
        spinBoxLayout->addWidget(priceLabel);
        spinBoxLayout->addWidget(priceSpinBox);
        doubleSpinBoxesGroup->setLayout(spinBoxLayout);
    }

    void Window::changePrecision(int decimals)
    {
        doubleSpinBox->setDecimals(decimals);
        scaleSpinBox->setDecimals(decimals);
        priceSpinBox->setDecimals(decimals);
    }