window.cpp Example File

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  #include <QtWidgets>

  #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);

      groupSeparatorSpinBox = new QSpinBox;
      groupSeparatorSpinBox->setRange(-99999999, 99999999);
      groupSeparatorSpinBox->setValue(1000);
      groupSeparatorSpinBox->setGroupSeparatorShown(true);
      QCheckBox *groupSeparatorChkBox = new QCheckBox;
      groupSeparatorChkBox->setText(tr("Show group separator"));
      groupSeparatorChkBox->setChecked(true);
      connect(groupSeparatorChkBox, &QCheckBox::toggled, groupSeparatorSpinBox,
              &QSpinBox::setGroupSeparatorShown);

      QLabel *hexLabel = new QLabel(tr("Enter a value between "
          "%1 and %2:").arg('-' + QString::number(31, 16)).arg(QString::number(31, 16)));
      QSpinBox *hexSpinBox = new QSpinBox;
      hexSpinBox->setRange(-31, 31);
      hexSpinBox->setSingleStep(1);
      hexSpinBox->setValue(0);
      hexSpinBox->setDisplayIntegerBase(16);

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

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

      QLabel *dateLabel = new QLabel;
      QDateEdit *dateEdit = new QDateEdit(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;
      QTimeEdit *timeEdit = new QTimeEdit(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(QString)),
              this, SLOT(setFormatString(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, 100);
      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)));

      groupSeparatorSpinBox_d = new QDoubleSpinBox;
      groupSeparatorSpinBox_d->setRange(-99999999, 99999999);
      groupSeparatorSpinBox_d->setDecimals(2);
      groupSeparatorSpinBox_d->setValue(1000.00);
      groupSeparatorSpinBox_d->setGroupSeparatorShown(true);
      QCheckBox *groupSeparatorChkBox = new QCheckBox;
      groupSeparatorChkBox->setText(tr("Show group separator"));
      groupSeparatorChkBox->setChecked(true);
      connect(groupSeparatorChkBox, &QCheckBox::toggled, groupSeparatorSpinBox_d,
              &QDoubleSpinBox::setGroupSeparatorShown);

      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);
      spinBoxLayout->addWidget(groupSeparatorChkBox);
      spinBoxLayout->addWidget(groupSeparatorSpinBox_d);
      doubleSpinBoxesGroup->setLayout(spinBoxLayout);
  }

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