Qt 4.0: window.cpp Example File (widgets/spinboxes/window.cpp)

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

        /****************************************************************************
        **
        ** Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
        ** This file may be used under the terms of the GNU General Public
    ** License version 2.0 as published by the Free Software Foundation
    ** and appearing in the file LICENSE.GPL included in the packaging of
    ** this file.  Please review the following information to ensure GNU
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    ** review the following information:
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        ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
        ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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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, 14);
            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);
        }