qdatetimeedit.cpp

奇趣公司比较新的qt/emd版本

        val = (wrapping ? max - (min - val) + 1 : min);
    } else if (val > max) {
        val = (wrapping ? min + val - max - 1 : max);
    }


    const int tmp = v.toDate().day();

    setDigit(v, sectionIndex, val); // if this sets year or month it will make

    // sure that days are lowered if needed.

    // changing one section should only modify that section, if possible
    if (sn.type != AmPmSection && (variantCompare(v, minimum) < 0) || (variantCompare(v, maximum) > 0)) {
        const int localmin = getDigit(minimum, sectionIndex);
        const int localmax = getDigit(maximum, sectionIndex);

        if (wrapping) {
            // just because we hit the roof in one direction, it
            // doesn't mean that we hit the floor in the other
            if (steps > 0) {
                setDigit(v, sectionIndex, min);
                if (sn.type != DaySection && sections & DateSectionMask) {
                    const int daysInMonth = v.toDate().daysInMonth();
                    if (v.toDate().day() < tmp && v.toDate().day() < daysInMonth) {
                        const int adds = qMin(tmp, daysInMonth);
                        v = v.toDateTime().addDays(adds - v.toDate().day());
                    }
                }

                if (variantCompare(v, minimum) < 0) {
                    setDigit(v, sectionIndex, localmin);
                    if (variantCompare(v, minimum) < 0)
                        setDigit(v, sectionIndex, localmin + 1);
                }
            } else {
                setDigit(v, sectionIndex, max);
                if (sn.type != DaySection && sections & DateSectionMask) {
                    const int daysInMonth = v.toDate().daysInMonth();
                    if (v.toDate().day() < tmp && v.toDate().day() < daysInMonth) {
                        const int adds = qMin(tmp, daysInMonth);
                        v = v.toDateTime().addDays(adds - v.toDate().day());
                    }
                }

                if (variantCompare(v, maximum) > 0) {
                    setDigit(v, sectionIndex, localmax);
                    if (variantCompare(v, maximum) > 0)
                        setDigit(v, sectionIndex, localmax - 1);
                }
            }
        } else {
            setDigit(v, sectionIndex, (steps > 0 ? localmax : localmin));
        }
    }
    if (!test && tmp != v.toDate().day() && sn.type != DaySection) {
        // this should not happen when called from stepEnabled
        cachedDay = qMax<int>(tmp, cachedDay);
    }

    if (variantCompare(v, minimum) < 0) {
        if (wrapping) {
            QVariant t = v;
            setDigit(t, sectionIndex, steps < 0 ? max : min);
            int mincmp = variantCompare(t, minimum);
            int maxcmp = variantCompare(t, maximum);
            if (mincmp >= 0 && maxcmp <= 0) {
                v = t;
            } else {
                setDigit(t, sectionIndex, getDigit(steps < 0 ? maximum : minimum, sectionIndex));
                mincmp = variantCompare(t, minimum);
                maxcmp = variantCompare(t, maximum);
                if (mincmp >= 0 && maxcmp <= 0) {
                    v = t;
                }
            }
        } else {
            v = value;
        }
    } else if (variantCompare(v, maximum) > 0) {
        if (wrapping) {
            QVariant t = v;
            setDigit(t, sectionIndex, steps > 0 ? min : max);
            int mincmp = variantCompare(t, minimum);
            int maxcmp = variantCompare(t, maximum);
            if (mincmp >= 0 && maxcmp <= 0) {
                v = t;
            } else {
                setDigit(t, sectionIndex, getDigit(steps > 0 ? minimum : maximum, sectionIndex));
                mincmp = variantCompare(t, minimum);
                maxcmp = variantCompare(t, maximum);
                if (mincmp >= 0 && maxcmp <= 0) {
                    v = t;
                }
            }
        } else {
            v = value;
        }
    }

    const QVariant ret = bound(v, value, steps);
    return ret;
}


/*!
  \internal
  \reimp
*/

void QDateTimeEditPrivate::emitSignals(EmitPolicy ep, const QVariant &old)
{
    Q_Q(QDateTimeEdit);
    if (ep == NeverEmit) {
        return;
    }
    pendingEmit = false;

    const bool dodate = value.toDate().isValid() && (sections & DateSectionMask);
    const bool datechanged = (ep == AlwaysEmit || old.toDate() != value.toDate());
    const bool dotime = value.toTime().isValid() && (sections & TimeSectionMask);
    const bool timechanged = (ep == AlwaysEmit || old.toTime() != value.toTime());

    updateCache(value, displayText());

    if (datechanged || timechanged)
        emit q->dateTimeChanged(value.toDateTime());
    if (dodate && datechanged)
        emit q->dateChanged(value.toDate());
    if (dotime && timechanged)
        emit q->timeChanged(value.toTime());

}

/*!
  \internal
  \reimp
*/

void QDateTimeEditPrivate::_q_editorCursorPositionChanged(int oldpos, int newpos)
{
    if (ignoreCursorPositionChanged || specialValue())
        return;
    const QString oldText = displayText();
    updateCache(value, oldText);

    const bool allowChange = !edit->hasSelectedText();
    const bool forward = oldpos <= newpos;
    ignoreCursorPositionChanged = true;
    int s = sectionAt(newpos);
    if (s == NoSectionIndex && forward && newpos > 0) {
        s = sectionAt(newpos - 1);
    }

    int c = newpos;

    const int selstart = edit->selectionStart();
    const int selSection = sectionAt(selstart);
    const int l = selSection != -1 ? sectionSize(selSection) : 0;

    if (s == NoSectionIndex) {
        if (l > 0 && selstart == sectionPos(selSection) && edit->selectedText().size() == l) {
            s = selSection;
            if (allowChange)
                setSelected(selSection, true);
            c = -1;
        } else {
            int closest = closestSection(newpos, forward);
            c = sectionPos(closest) + (forward ? 0 : qMax<int>(0, sectionSize(closest)));

            if (allowChange) {
                edit->setCursorPosition(c);
                QDTEDEBUG << c;
            }
            s = closest;
        }
    }

    if (allowChange && currentSectionIndex != s) {
        interpret(EmitIfChanged);
    }
    if (c == -1) {
        setSelected(s, true);
    } else if (!edit->hasSelectedText()) {
        if (oldpos < newpos) {
            edit->setCursorPosition(displayText().size() - (oldText.size() - c));
        } else {
            edit->setCursorPosition(c);
        }
    }

    QDTEDEBUG << "currentSectionIndex is set to" << sectionName(sectionType(s))
              << oldpos << newpos
              << "was" << sectionName(sectionType(currentSectionIndex));

    currentSectionIndex = s;
    Q_ASSERT_X(currentSectionIndex < sectionNodes.size(),
               "QDateTimeEditPrivate::_q_editorCursorPositionChanged()",
               qPrintable(QString::fromAscii("Internal error (%1 %2)").
                          arg(currentSectionIndex).
                          arg(sectionNodes.size())));

    ignoreCursorPositionChanged = false;
}

/*!
  \internal

  Try to get the format from the local settings
*/
void QDateTimeEditPrivate::readLocaleSettings()
{
    const QLocale loc;
    defaultTimeFormat = loc.timeFormat(QLocale::ShortFormat);
    defaultDateFormat = loc.dateFormat(QLocale::ShortFormat);
}

QDateTimeEdit::Section QDateTimeEditPrivate::convertToPublic(QDateTimeParser::Section s)
{
    switch (s & ~Internal) {
    case AmPmSection: return QDateTimeEdit::AmPmSection;
    case MSecSection: return QDateTimeEdit::MSecSection;
    case SecondSection: return QDateTimeEdit::SecondSection;
    case MinuteSection: return QDateTimeEdit::MinuteSection;
    case DaySection: return QDateTimeEdit::DaySection;
    case MonthSection: return QDateTimeEdit::MonthSection;
    case YearSection: return QDateTimeEdit::YearSection;
    case Hour12Section:
    case Hour24Section: return QDateTimeEdit::HourSection;
    case FirstSection:
    case NoSection:
    case LastSection: break;
    }
    return QDateTimeEdit::NoSection;
}

QDateTimeEdit::Sections QDateTimeEditPrivate::convertSections(QDateTimeParser::Sections s)
{
    QDateTimeEdit::Sections ret = 0;
    if (s & QDateTimeParser::MSecSection)
        ret |= QDateTimeEdit::MSecSection;
    if (s & QDateTimeParser::SecondSection)
        ret |= QDateTimeEdit::SecondSection;
    if (s & QDateTimeParser::MinuteSection)
        ret |= QDateTimeEdit::MinuteSection;
    if (s & (QDateTimeParser::Hour24Section|QDateTimeParser::Hour12Section))
        ret |= QDateTimeEdit::HourSection;
    if (s & QDateTimeParser::AmPmSection)
        ret |= QDateTimeEdit::AmPmSection;
    if (s & QDateTimeParser::DaySection)
        ret |= QDateTimeEdit::DaySection;
    if (s & QDateTimeParser::MonthSection)
        ret |= QDateTimeEdit::MonthSection;
    if (s & QDateTimeParser::YearSection)
        ret |= QDateTimeEdit::YearSection;

    return ret;
}

/*!
    \reimp
*/

void QDateTimeEdit::paintEvent(QPaintEvent *event)
{
    Q_D(QDateTimeEdit);
    if (!d->showCalendarPopup()) {
        QAbstractSpinBox::paintEvent(event);
        return;
    }

    QStyleOptionSpinBox opt;
    initStyleOption(&opt);

    QStyleOptionComboBox optCombo;

    optCombo.init(this);
    optCombo.editable = true;
    optCombo.subControls = opt.subControls;
    optCombo.activeSubControls = opt.activeSubControls;
    optCombo.state = opt.state;

    QPainter p(this);
    style()->drawComplexControl(QStyle::CC_ComboBox, &optCombo, &p, this);
}

QString QDateTimeEditPrivate::getAmPmText(AmPm ap, Case cs) const
{
    if (ap == AmText) {
        return (cs == UpperCase ? QDateTimeEdit::tr("AM") : QDateTimeEdit::tr("am"));
    } else {
        return (cs == UpperCase ? QDateTimeEdit::tr("PM") : QDateTimeEdit::tr("pm"));
    }
}

int QDateTimeEditPrivate::absoluteIndex(QDateTimeEdit::Section s, int index) const
{
    for (int i=0; i<sectionNodes.size(); ++i) {
        if (convertToPublic(sectionNodes.at(i).type) == s && index-- == 0) {
            return i;
        }
    }
    return NoSectionIndex;
}

int QDateTimeEditPrivate::absoluteIndex(const SectionNode &s) const
{
    return sectionNodes.indexOf(s);
}

void QDateTimeEditPrivate::interpret(EmitPolicy ep)
{
    Q_Q(QDateTimeEdit);
    QString tmp = displayText();
    int pos = edit->cursorPosition();
    const QValidator::State state = q->validate(tmp, pos);
    if (state != QValidator::Acceptable
        && correctionMode == QAbstractSpinBox::CorrectToPreviousValue
        && (state == QValidator::Invalid || !(fieldInfo(currentSectionIndex) & AllowPartial))) {
        setValue(value, ep);
    } else {
        QAbstractSpinBoxPrivate::interpret(ep);
    }
}

/*!
    Initialize \a option with the values from this QDataTimeEdit. This method
    is useful for subclasses when they need a QStyleOptionSpinBox, but don't want
    to fill in all the information themselves.

    \sa QStyleOption::initFrom()
*/
void QDateTimeEdit::initStyleOption(QStyleOptionSpinBox *option) const
{
    if (!option)
        return;

    Q_D(const QDateTimeEdit);
    QAbstractSpinBox::initStyleOption(option);
    if (d->showCalendarPopup()) {
        option->subControls = QStyle::SC_ComboBoxFrame | QStyle::SC_ComboBoxEditField
                              | QStyle::SC_ComboBoxArrow;
        if (d->arrowState == QStyle::State_Sunken)
            option->state |= QStyle::State_Sunken;
        else
            option->state &= ~QStyle::State_Sunken;
    }
}

void QDateTimeEditPrivate::init()
{
    setLayoutItemMargins(QStyle::SE_DateTimeEditLayoutItem);
}

void QDateTimeEditPrivate::_q_resetButton()
{
    updateArrow(QStyle::State_None);
}

void QDateTimeEditPrivate::updateArrow(QStyle::StateFlag state)
{
    Q_Q(QDateTimeEdit);

    if (arrowState == state)
        return;
    arrowState = state;
    if (arrowState != QStyle::State_None)
        buttonState |= Mouse;
    else {
        buttonState = 0;
        hoverControl = QStyle::SC_ComboBoxFrame;
    }
    q->update();
}

/*!
    \internal
    Returns the hover control at \a pos.
    This will update the hoverRect and hoverControl.
*/
QStyle::SubControl QDateTimeEditPrivate::newHoverControl(const QPoint &pos)
{
    if (!showCalendarPopup())
        return QAbstractSpinBoxPrivate::newHoverControl(pos);

    Q_Q(QDateTimeEdit);

    QStyleOptionComboBox optCombo;
    optCombo.init(q);
    optCombo.editable = true;
    optCombo.subControls = QStyle::SC_All;
    hoverControl = q->style()->hitTestComplexControl(QStyle::CC_ComboBox, &optCombo, pos, q);
    return hoverControl;
}

void QDateTimeEditPrivate::updateEditFieldGeometry()
{
    if (!showCalendarPopup()) {
        QAbstractSpinBoxPrivate::updateEditFieldGeometry();
        return;
    }

    Q_Q(QDateTimeEdit);

    QStyleOptionComboBox optCombo;
    optCombo.init(q);
    optCombo.editable = true;
    optCombo.subControls = QStyle::SC_ComboBoxEditField;
    edit->setGeometry(q->style()->subControlRect(QStyle::CC_ComboBox, &optCombo,
                                                 QStyle::SC_ComboBoxEditField, q));
}

bool QDateTimeEditPrivate::isSeparatorKey(const QKeyEvent *ke) const
{
    if (!ke->text().isEmpty() && currentSectionIndex + 1 < sectionNodes.size() && currentSectionIndex >= 0) {
        if (fieldInfo(currentSectionIndex) & Numeric) {
            if (ke->text().at(0).isNumber())
                return false;
        } else if (ke->text().at(0).isLetterOrNumber()) {
            return false;
        }
        return separators.at(currentSectionIndex + 1).contains(ke->text());
    }
    return false;
}

void QDateTimeEditPrivate::initCalendarPopup()
{
    Q_Q(QDateTimeEdit);
    if (!monthCalendar) {
        monthCalendar = new QCalendarPopup(q->date(), q);
        monthCalendar->setObjectName(QLatin1String("qt_datetimedit_calendar"));
        QObject::connect(monthCalendar, SIGNAL(newDateSelected(QDate)), q, SLOT(setDate(QDate)));
        QObject::connect(monthCalendar, SIGNAL(hidingCalendar(QDate)), q, SLOT(setDate(QDate)));
        QObject::connect(monthCalendar, SIGNAL(activated(QDate)), q, SLOT(setDate(QDate)));
        QObject::connect(monthCalendar, SIGNAL(activated(QDate)), monthCalendar, SLOT(close()));
        QObject::connect(monthCalendar, SIGNAL(resetButton()), q, SLOT(_q_resetButton()));
    }
    else
        monthCalendar->setDate(q->date());
    monthCalendar->setDateRange(q->minimumDate(), q->maximumDate());
}

void QDateTimeEditPrivate::positionCalendarPopup()
{
    Q_Q(QDateTimeEdit);
    QPoin