void Window::localeChanged(int index)
{
    const QLocale newLocale(localeCombo->itemData(index).toLocale());
    calendar->setLocale(newLocale);
    int newLocaleFirstDayIndex = firstDayCombo->findData(newLocale.firstDayOfWeek());
    firstDayCombo->setCurrentIndex(newLocaleFirstDayIndex);
}


void Window::firstDayChanged(int index)
{
    calendar->setFirstDayOfWeek(Qt::DayOfWeek(
                                firstDayCombo->itemData(index).toInt()));
}


void Window::selectionModeChanged(int index)
{
    calendar->setSelectionMode(QCalendarWidget::SelectionMode(
                               selectionModeCombo->itemData(index).toInt()));
}

void Window::horizontalHeaderChanged(int index)
{
    calendar->setHorizontalHeaderFormat(QCalendarWidget::HorizontalHeaderFormat(
        horizontalHeaderCombo->itemData(index).toInt()));
}

void Window::verticalHeaderChanged(int index)
{
    calendar->setVerticalHeaderFormat(QCalendarWidget::VerticalHeaderFormat(
        verticalHeaderCombo->itemData(index).toInt()));
}


void Window::selectedDateChanged()
{
    currentDateEdit->setDate(calendar->selectedDate());
}



void Window::minimumDateChanged(const QDate &date)
{
    calendar->setMinimumDate(date);
    maximumDateEdit->setDate(calendar->maximumDate());
}



void Window::maximumDateChanged(const QDate &date)
{
    calendar->setMaximumDate(date);
    minimumDateEdit->setDate(calendar->minimumDate());
}


void Window::weekdayFormatChanged()
{
    QTextCharFormat format;

    format.setForeground(qvariant_cast<QColor>(
        weekdayColorCombo->itemData(weekdayColorCombo->currentIndex())));
    calendar->setWeekdayTextFormat(Qt::Monday, format);
    calendar->setWeekdayTextFormat(Qt::Tuesday, format);
    calendar->setWeekdayTextFormat(Qt::Wednesday, format);
    calendar->setWeekdayTextFormat(Qt::Thursday, format);
    calendar->setWeekdayTextFormat(Qt::Friday, format);
}



void Window::weekendFormatChanged()
{
    QTextCharFormat format;

    format.setForeground(qvariant_cast<QColor>(
        weekendColorCombo->itemData(weekendColorCombo->currentIndex())));
    calendar->setWeekdayTextFormat(Qt::Saturday, format);
    calendar->setWeekdayTextFormat(Qt::Sunday, format);
}



void Window::reformatHeaders()
{
    QString text = headerTextFormatCombo->currentText();
    QTextCharFormat format;

    if (text == tr("Bold")) {
        format.setFontWeight(QFont::Bold);
    } else if (text == tr("Italic")) {
        format.setFontItalic(true);
    } else if (text == tr("Green")) {
        format.setForeground(Qt::green);
    }
    calendar->setHeaderTextFormat(format);
}

QT实现日历显示_Qt