qquickcombobox.cpp

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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qquickcombobox_p.h"
#include "qquickcontrol_p_p.h"
#include "qquickabstractbutton_p.h"
#include "qquickabstractbutton_p_p.h"
#include "qquickpopup_p_p.h"
#include "qquickdeferredexecute_p_p.h"
 
#include <QtCore/qregularexpression.h>
#include <QtCore/qabstractitemmodel.h>
#include <QtCore/qglobal.h>
#include <QtGui/qinputmethod.h>
#include <QtGui/qguiapplication.h>
#include <QtGui/private/qguiapplication_p.h>
#include <QtGui/qpa/qplatformtheme.h>
#include <QtQml/qjsvalue.h>
#include <QtQml/qqmlcontext.h>
#include <QtQml/private/qlazilyallocated_p.h>
#include <private/qqmldelegatemodel_p.h>
#include <QtQuick/private/qquickaccessibleattached_p.h>
#include <QtQuick/private/qquickevents_p_p.h>
#include <QtQuick/private/qquicktextinput_p.h>
#include <QtQuick/private/qquicktextinput_p_p.h>
#if QT_CONFIG(quick_itemview)
#include <QtQuick/private/qquickitemview_p.h>
#endif
 
QT_BEGIN_NAMESPACE
 
Q_LOGGING_CATEGORY(lcCalculateWidestTextWidth, "qt.quick.controls.combobox.calculatewidesttextwidth")
 
 
 
namespace {
    enum Activation { NoActivate, Activate };
    enum Highlighting { NoHighlight, Highlight };
}
 
// ### Qt7: Remove this class. Use QQmlDelegateModel instead.
class QQuickComboBoxDelegateModel : public QQmlDelegateModel
{
public:
    explicit QQuickComboBoxDelegateModel(QQuickComboBox *combo);
    QVariant variantValue(int index, const QString &role) override;
 
private:
    QQuickComboBox *combo = nullptr;
};
 
QQuickComboBoxDelegateModel::QQuickComboBoxDelegateModel(QQuickComboBox *combo)
    : QQmlDelegateModel(qmlContext(combo), combo),
      combo(combo)
{
}
 
QVariant QQuickComboBoxDelegateModel::variantValue(int index, const QString &role)
{
    // ### Qt7: Get rid of this. Why do we special case lists of variant maps with
    //          exactly one entry? There are many other ways of producing a list of
    //          map-like things with exactly one entry. And what if some of the maps
    //          in the list have more than one entry? You get inconsistent results.
    if (role == QLatin1String("modelData")) {
        const QVariant model = combo->model();
        if (model.metaType() == QMetaType::fromType<QVariantList>()) {
            const QVariant object = model.toList().value(index);
            if (object.metaType() == QMetaType::fromType<QVariantMap>()) {
                const QVariantMap data = object.toMap();
                if (data.size() == 1)
                    return data.first();
            }
        }
    }
 
    return QQmlDelegateModel::variantValue(index, role);
}
 
class QQuickComboBoxPrivate : public QQuickControlPrivate
{
public:
    Q_DECLARE_PUBLIC(QQuickComboBox)
 
    bool isPopupVisible() const;
    void showPopup();
    void hidePopup(bool accept);
    void togglePopup(bool accept);
    void popupVisibleChanged();
    void popupDestroyed();
 
    void itemClicked();
    void itemHovered();
 
    void createdItem(int index, QObject *object);
    void modelUpdated();
    void countChanged();
 
    QString effectiveTextRole() const;
    void updateEditText();
    void updateCurrentText();
    void updateCurrentValue();
    void updateCurrentTextAndValue();
    void updateAcceptableInput();
 
    bool isValidIndex(int index) const;
 
    void acceptInput();
    QString tryComplete(const QString &inputText);
 
    void incrementCurrentIndex();
    void decrementCurrentIndex();
    void setCurrentIndex(int index, Activation activate);
    void updateHighlightedIndex();
    void setHighlightedIndex(int index, Highlighting highlight);
 
    void keySearch(const QString &text);
    int match(int start, const QString &text, Qt::MatchFlags flags) const;
 
    void createDelegateModel();
 
    bool handlePress(const QPointF &point, ulong timestamp) override;
    bool handleMove(const QPointF &point, ulong timestamp) override;
    bool handleRelease(const QPointF &point, ulong timestamp) override;
    void handleUngrab() override;
 
    void cancelIndicator();
    void executeIndicator(bool complete = false);
 
    void cancelPopup();
    void executePopup(bool complete = false);
 
    void itemImplicitWidthChanged(QQuickItem *item) override;
    void itemImplicitHeightChanged(QQuickItem *item) override;
    void itemDestroyed(QQuickItem *item) override;
 
    void setInputMethodHints(Qt::InputMethodHints hints, bool force = false);
 
    virtual qreal getContentWidth() const override;
    qreal calculateWidestTextWidth() const;
    void maybeUpdateImplicitContentWidth();
 
    static void hideOldPopup(QQuickPopup *popup);
 
    QPalette defaultPalette() const override { return QQuickTheme::palette(QQuickTheme::ComboBox); }
 
    bool flat = false;
    bool down = false;
    bool hasDown = false;
    bool pressed = false;
    bool ownModel = false;
    bool keyNavigating = false;
    bool hasDisplayText = false;
    bool hasCurrentIndex = false;
    bool hasCalculatedWidestText = false;
    int highlightedIndex = -1;
    int currentIndex = -1;
    QQuickComboBox::ImplicitContentWidthPolicy implicitContentWidthPolicy = QQuickComboBox::ContentItemImplicitWidth;
    QVariant model;
    QString textRole;
    QString currentText;
    QString displayText;
    QString valueRole;
    QVariant currentValue;
    QQuickItem *pressedItem = nullptr;
    QQmlInstanceModel *delegateModel = nullptr;
    QQmlComponent *delegate = nullptr;
    QQuickDeferredPointer<QQuickItem> indicator;
    QQuickDeferredPointer<QQuickPopup> popup;
    bool m_acceptableInput = true;
 
    struct ExtraData {
        bool editable = false;
        bool accepting = false;
        bool allowComplete = false;
        bool selectTextByMouse = false;
        Qt::InputMethodHints inputMethodHints = Qt::ImhNone;
        QString editText;
#if QT_CONFIG(validator)
        QValidator *validator = nullptr;
#endif
    };
    QLazilyAllocated<ExtraData> extra;
};
 
bool QQuickComboBoxPrivate::isPopupVisible() const
{
    return popup && popup->isVisible();
}
 
void QQuickComboBoxPrivate::showPopup()
{
    if (!popup)
        executePopup(true);
 
    if (popup && !popup->isVisible())
        popup->open();
}
 
void QQuickComboBoxPrivate::hidePopup(bool accept)
{
    Q_Q(QQuickComboBox);
    if (accept) {
        q->setCurrentIndex(highlightedIndex);
        emit q->activated(currentIndex);
    }
    if (popup && popup->isVisible())
        popup->close();
}
 
void QQuickComboBoxPrivate::togglePopup(bool accept)
{
    if (!popup || !popup->isVisible())
        showPopup();
    else
        hidePopup(accept);
}
 
void QQuickComboBoxPrivate::popupVisibleChanged()
{
    Q_Q(QQuickComboBox);
    if (isPopupVisible())
        QGuiApplication::inputMethod()->reset();
 
#if QT_CONFIG(quick_itemview)
    QQuickItemView *itemView = popup->findChild<QQuickItemView *>();
    if (itemView)
        itemView->setHighlightRangeMode(QQuickItemView::NoHighlightRange);
#endif
 
    updateHighlightedIndex();
 
#if QT_CONFIG(quick_itemview)
    if (itemView)
        itemView->positionViewAtIndex(highlightedIndex, QQuickItemView::Beginning);
#endif
 
    if (!hasDown) {
        q->setDown(pressed || isPopupVisible());
        hasDown = false;
    }
}
 
void QQuickComboBoxPrivate::popupDestroyed()
{
    Q_Q(QQuickComboBox);
    popup = nullptr;
    emit q->popupChanged();
}
 
void QQuickComboBoxPrivate::itemClicked()
{
    Q_Q(QQuickComboBox);
    int index = delegateModel->indexOf(q->sender(), nullptr);
    if (index != -1) {
        setHighlightedIndex(index, Highlight);
        hidePopup(true);
    }
}
 
void QQuickComboBoxPrivate::itemHovered()
{
    Q_Q(QQuickComboBox);
    if (keyNavigating)
        return;
 
    QQuickAbstractButton *button = qobject_cast<QQuickAbstractButton *>(q->sender());
    if (!button || !button->isHovered() || !button->isEnabled() || QQuickAbstractButtonPrivate::get(button)->touchId != -1)
        return;
 
    int index = delegateModel->indexOf(button, nullptr);
    if (index != -1) {
        setHighlightedIndex(index, Highlight);
 
#if QT_CONFIG(quick_itemview)
        if (QQuickItemView *itemView = popup->findChild<QQuickItemView *>())
            itemView->positionViewAtIndex(index, QQuickItemView::Contain);
#endif
    }
}
 
void QQuickComboBoxPrivate::createdItem(int index, QObject *object)
{
    Q_Q(QQuickComboBox);
    QQuickItem *item = qobject_cast<QQuickItem *>(object);
    if (item && !item->parentItem()) {
        if (popup)
            item->setParentItem(popup->contentItem());
        else
            item->setParentItem(q);
        QQuickItemPrivate::get(item)->setCulled(true);
    }
 
    QQuickAbstractButton *button = qobject_cast<QQuickAbstractButton *>(object);
    if (button) {
        button->setFocusPolicy(Qt::NoFocus);
        connect(button, &QQuickAbstractButton::clicked, this, &QQuickComboBoxPrivate::itemClicked);
        connect(button, &QQuickAbstractButton::hoveredChanged, this, &QQuickComboBoxPrivate::itemHovered);
    }
 
    if (index == currentIndex && !q->isEditable())
        updateCurrentTextAndValue();
}
 
void QQuickComboBoxPrivate::modelUpdated()
{
    if (componentComplete && (!extra.isAllocated() || !extra->accepting)) {
        updateCurrentTextAndValue();
 
        if (implicitContentWidthPolicy == QQuickComboBox::WidestText)
            updateImplicitContentSize();
    }
}
 
void QQuickComboBoxPrivate::countChanged()
{
    Q_Q(QQuickComboBox);
    if (q->count() == 0)
        q->setCurrentIndex(-1);
    emit q->countChanged();
}
 
QString QQuickComboBoxPrivate::effectiveTextRole() const
{
    return textRole.isEmpty() ? QStringLiteral("modelData") : textRole;
}
 
void QQuickComboBoxPrivate::updateEditText()
{
    Q_Q(QQuickComboBox);
    QQuickTextInput *input = qobject_cast<QQuickTextInput *>(contentItem);
    if (!input)
        return;
 
    const QString text = input->text();
 
    if (extra.isAllocated() && extra->allowComplete && !text.isEmpty()) {
        const QString completed = tryComplete(text);
        if (completed.size() > text.size()) {
            input->setText(completed);
            // This will select the text backwards.
            input->select(completed.size(), text.size());
            return;
        }
    }
    q->setEditText(text);
}
 
void QQuickComboBoxPrivate::updateCurrentText()
{
    Q_Q(QQuickComboBox);
    const QString text = q->textAt(currentIndex);
    if (currentText != text) {
        currentText = text;
        if (!hasDisplayText)
           q->maybeSetAccessibleName(text);
        emit q->currentTextChanged();
    }
    if (!hasDisplayText && displayText != text) {
        displayText = text;
        emit q->displayTextChanged();
    }
    if (!extra.isAllocated() || !extra->accepting)
        q->setEditText(currentText);
}
 
void QQuickComboBoxPrivate::updateCurrentValue()
{
    Q_Q(QQuickComboBox);
    const QVariant value = q->valueAt(currentIndex);
    if (currentValue == value)
        return;
 
    currentValue = value;
    emit q->currentValueChanged();
}
 
void QQuickComboBoxPrivate::updateCurrentTextAndValue()
{
    updateCurrentText();
    updateCurrentValue();
}
 
void QQuickComboBoxPrivate::updateAcceptableInput()
{
    Q_Q(QQuickComboBox);
 
    if (!contentItem)
        return;
 
    const QQuickTextInput *textInputContentItem = qobject_cast<QQuickTextInput *>(contentItem);
 
    if (!textInputContentItem)
        return;
 
    const bool newValue = textInputContentItem->hasAcceptableInput();
 
    if (m_acceptableInput != newValue) {
        m_acceptableInput = newValue;
        emit q->acceptableInputChanged();
    }
}
 
bool QQuickComboBoxPrivate::isValidIndex(int index) const
{
    return delegateModel && index >= 0 && index < delegateModel->count();
}
 
void QQuickComboBoxPrivate::acceptInput()
{
    Q_Q(QQuickComboBox);
    int idx = q->find(extra.value().editText, Qt::MatchFixedString);
    if (idx > -1) {
        // The item that was accepted already exists, so make it the current item.
        q->setCurrentIndex(idx);
        // After accepting text that matches an existing entry, the selection should be cleared.
        QQuickTextInput *input = qobject_cast<QQuickTextInput *>(contentItem);
        if (input) {
            const auto text = input->text();
            input->select(text.size(), text.size());
        }
    }
 
    extra.value().accepting = true;
    emit q->accepted();
 
    // The user might have added the item since it didn't exist, so check again
    // to see if we can select that new item.
    if (idx == -1)
        q->setCurrentIndex(q->find(extra.value().editText, Qt::MatchFixedString));
    extra.value().accepting = false;
}
 
QString QQuickComboBoxPrivate::tryComplete(const QString &input)
{
    Q_Q(QQuickComboBox);
    QString match;
 
    const int itemCount = q->count();
    for (int idx = 0; idx < itemCount; ++idx) {
        const QString text = q->textAt(idx);
        if (!text.startsWith(input, Qt::CaseInsensitive))
            continue;
 
        // either the first or the shortest match
        if (match.isEmpty() || text.size() < match.size())
            match = text;
    }
 
    if (match.isEmpty())
        return input;
 
    return input + match.mid(input.size());
}
 
void QQuickComboBoxPrivate::setCurrentIndex(int index, Activation activate)
{
    Q_Q(QQuickComboBox);
    if (currentIndex == index)
        return;
 
    currentIndex = index;
    emit q->currentIndexChanged();
 
    if (componentComplete)
        updateCurrentTextAndValue();
 
    if (activate)
        emit q->activated(index);
}
 
void QQuickComboBoxPrivate::incrementCurrentIndex()
{
    Q_Q(QQuickComboBox);
    if (extra.isAllocated())
        extra->allowComplete = false;
    if (isPopupVisible()) {
        if (highlightedIndex < q->count() - 1)
            setHighlightedIndex(highlightedIndex + 1, Highlight);
    } else {
        if (currentIndex < q->count() - 1)
            setCurrentIndex(currentIndex + 1, Activate);
    }
    if (extra.isAllocated())
        extra->allowComplete = true;
}
 
void QQuickComboBoxPrivate::decrementCurrentIndex()
{
    if (extra.isAllocated())
        extra->allowComplete = false;
    if (isPopupVisible()) {
        if (highlightedIndex > 0)
            setHighlightedIndex(highlightedIndex - 1, Highlight);
    } else {
        if (currentIndex > 0)
            setCurrentIndex(currentIndex - 1, Activate);
    }
    if (extra.isAllocated())
        extra->allowComplete = true;
}
 
void QQuickComboBoxPrivate::updateHighlightedIndex()
{
    setHighlightedIndex(popup->isVisible() ? currentIndex : -1, NoHighlight);
}
 
void QQuickComboBoxPrivate::setHighlightedIndex(int index, Highlighting highlight)
{
    Q_Q(QQuickComboBox);
    if (highlightedIndex == index)
        return;
 
    highlightedIndex = index;
    emit q->highlightedIndexChanged();
 
    if (highlight)
        emit q->highlighted(index);
}
 
void QQuickComboBoxPrivate::keySearch(const QString &text)
{
    const int startIndex = isPopupVisible() ? highlightedIndex : currentIndex;
    const int index = match(startIndex + 1, text, Qt::MatchStartsWith | Qt::MatchWrap);
    if (index != -1) {
        if (isPopupVisible())
            setHighlightedIndex(index, Highlight);
        else
            setCurrentIndex(index, Activate);
    }
}
 
int QQuickComboBoxPrivate::match(int start, const QString &text, Qt::MatchFlags flags) const
{
    Q_Q(const QQuickComboBox);
    uint matchType = flags & 0x0F;
    bool wrap = flags & Qt::MatchWrap;
    Qt::CaseSensitivity cs = flags & Qt::MatchCaseSensitive ? Qt::CaseSensitive : Qt::CaseInsensitive;
    QRegularExpression::PatternOptions options = flags & Qt::MatchCaseSensitive ? QRegularExpression::NoPatternOption
                                                                                : QRegularExpression::CaseInsensitiveOption;
    int from = start;
    int to = q->count();
 
    // iterates twice if wrapping
    for (int i = 0; (wrap && i < 2) || (!wrap && i < 1); ++i) {
        for (int idx = from; idx < to; ++idx) {
            QString t = q->textAt(idx);
            switch (matchType) {
            case Qt::MatchExactly:
                if (t == text)
                    return idx;
                break;
            case Qt::MatchRegularExpression: {
                QRegularExpression rx(QRegularExpression::anchoredPattern(text), options);
                if (rx.match(t).hasMatch())
                    return idx;
                break;
            }
            case Qt::MatchWildcard: {
                QRegularExpression rx(QRegularExpression::wildcardToRegularExpression(text),
                                      options);
                if (rx.match(t).hasMatch())
                    return idx;
                break;
            }
            case Qt::MatchStartsWith:
                if (t.startsWith(text, cs))
                    return idx;
                break;
            case Qt::MatchEndsWith:
                if (t.endsWith(text, cs))
                    return idx;
                break;
            case Qt::MatchFixedString:
                if (t.compare(text, cs) == 0)
                    return idx;
                break;
            case Qt::MatchContains:
            default:
                if (t.contains(text, cs))
                    return idx;
                break;
            }
        }
        // prepare for the next iteration
        from = 0;
        to = start;
    }
    return -1;
}
 
void QQuickComboBoxPrivate::createDelegateModel()
{
    Q_Q(QQuickComboBox);
    bool ownedOldModel = ownModel;
    QQmlInstanceModel* oldModel = delegateModel;
    if (oldModel) {
        disconnect(delegateModel, &QQmlInstanceModel::countChanged, this, &QQuickComboBoxPrivate::countChanged);
        disconnect(delegateModel, &QQmlInstanceModel::modelUpdated, this, &QQuickComboBoxPrivate::modelUpdated);
        disconnect(delegateModel, &QQmlInstanceModel::createdItem, this, &QQuickComboBoxPrivate::createdItem);
    }
 
    ownModel = false;
    delegateModel = model.value<QQmlInstanceModel *>();
 
    if (!delegateModel && model.isValid()) {
        QQmlDelegateModel *dataModel = new QQuickComboBoxDelegateModel(q);
        dataModel->setModel(model);
        dataModel->setDelegate(delegate);
        if (q->isComponentComplete())
            dataModel->componentComplete();
 
        ownModel = true;
        delegateModel = dataModel;
    }
 
    if (delegateModel) {
        connect(delegateModel, &QQmlInstanceModel::countChanged, this, &QQuickComboBoxPrivate::countChanged);
        connect(delegateModel, &QQmlInstanceModel::modelUpdated, this, &QQuickComboBoxPrivate::modelUpdated);
        connect(delegateModel, &QQmlInstanceModel::createdItem, this, &QQuickComboBoxPrivate::createdItem);
    }
 
    emit q->delegateModelChanged();
 
    if (ownedOldModel)
        delete oldModel;
}
 
bool QQuickComboBoxPrivate::handlePress(const QPointF &point, ulong timestamp)
{
    Q_Q(QQuickComboBox);
    QQuickControlPrivate::handlePress(point, timestamp);
    q->setPressed(true);
    return true;
}
 
bool QQuickComboBoxPrivate::handleMove(const QPointF &point, ulong timestamp)
{
    Q_Q(QQuickComboBox);
    QQuickControlPrivate::handleMove(point, timestamp);
    q->setPressed(q->contains(point));
    return true;
}
 
bool QQuickComboBoxPrivate::handleRelease(const QPointF &point, ulong timestamp)
{
    Q_Q(QQuickComboBox);
    QQuickControlPrivate::handleRelease(point, timestamp);
    if (pressed) {
        q->setPressed(false);
        togglePopup(false);
    }
    return true;
}
 
void QQuickComboBoxPrivate::handleUngrab()
{
    Q_Q(QQuickComboBox);
    QQuickControlPrivate::handleUngrab();
    q->setPressed(false);
}
 
void QQuickComboBoxPrivate::cancelIndicator()
{
    Q_Q(QQuickComboBox);
    quickCancelDeferred(q, indicatorName());
}
 
void QQuickComboBoxPrivate::executeIndicator(bool complete)
{
    Q_Q(QQuickComboBox);
    if (indicator.wasExecuted())
        return;
 
    if (!indicator || complete)
        quickBeginDeferred(q, indicatorName(), indicator);
    if (complete)
        quickCompleteDeferred(q, indicatorName(), indicator);
}
 
static inline QString popupName() { return QStringLiteral("popup"); }
 
void QQuickComboBoxPrivate::cancelPopup()
{
    Q_Q(QQuickComboBox);
    quickCancelDeferred(q, popupName());
}
 
void QQuickComboBoxPrivate::executePopup(bool complete)
{
    Q_Q(QQuickComboBox);
    if (popup.wasExecuted())
        return;
 
    if (!popup || complete)
        quickBeginDeferred(q, popupName(), popup);
    if (complete)
        quickCompleteDeferred(q, popupName(), popup);
}
 
void QQuickComboBoxPrivate::itemImplicitWidthChanged(QQuickItem *item)
{
    Q_Q(QQuickComboBox);
    QQuickControlPrivate::itemImplicitWidthChanged(item);
    if (item == indicator)
        emit q->implicitIndicatorWidthChanged();
}
 
void QQuickComboBoxPrivate::setInputMethodHints(Qt::InputMethodHints hints, bool force)
{
    Q_Q(QQuickComboBox);
    if (!force && hints == q->inputMethodHints())
        return;
 
    extra.value().inputMethodHints = hints;
    emit q->inputMethodHintsChanged();
}
 
void QQuickComboBoxPrivate::itemImplicitHeightChanged(QQuickItem *item)
{
    Q_Q(QQuickComboBox);
    QQuickControlPrivate::itemImplicitHeightChanged(item);
    if (item == indicator)
        emit q->implicitIndicatorHeightChanged();
}
 
void QQuickComboBoxPrivate::itemDestroyed(QQuickItem *item)
{
    Q_Q(QQuickComboBox);
    QQuickControlPrivate::itemDestroyed(item);
    if (item == indicator) {
        indicator = nullptr;
        emit q->indicatorChanged();
    }
}
 
qreal QQuickComboBoxPrivate::getContentWidth() const
{
    if (componentComplete) {
        switch (implicitContentWidthPolicy) {
        case QQuickComboBox::WidestText:
            return calculateWidestTextWidth();
        case QQuickComboBox::WidestTextWhenCompleted:
            if (!hasCalculatedWidestText)
                return calculateWidestTextWidth();
            break;
        default:
            break;
        }
    }
 
    return QQuickControlPrivate::getContentWidth();
}
 
qreal QQuickComboBoxPrivate::calculateWidestTextWidth() const
{
    Q_Q(const QQuickComboBox);
    if (!componentComplete)
        return 0;
 
    const int count = q->count();
    if (count == 0)
        return 0;
 
    auto textInput = qobject_cast<QQuickTextInput*>(contentItem);
    if (!textInput)
        return 0;
 
    qCDebug(lcCalculateWidestTextWidth) << "calculating widest text from" << count << "items...";
 
    // Avoid the index check and repeated calls to effectiveTextRole()
    // that would result from calling textAt() in a loop.
    const QString textRole = effectiveTextRole();
    auto textInputPrivate = QQuickTextInputPrivate::get(textInput);
    qreal widest = 0;
    for (int i = 0; i < count; ++i) {
        const QString text = delegateModel->stringValue(i, textRole);
        const qreal textImplicitWidth = textInputPrivate->calculateImplicitWidthForText(text);
        widest = qMax(widest, textImplicitWidth);
    }
 
    qCDebug(lcCalculateWidestTextWidth) << "... widest text is" << widest;
    return widest;
}
 
void QQuickComboBoxPrivate::maybeUpdateImplicitContentWidth()
{
    if (!componentComplete)
        return;
 
    if (implicitContentWidthPolicy == QQuickComboBox::ContentItemImplicitWidth
        || (implicitContentWidthPolicy == QQuickComboBox::WidestTextWhenCompleted && hasCalculatedWidestText))
        return;
 
    updateImplicitContentWidth();
    hasCalculatedWidestText = true;
}
 
void QQuickComboBoxPrivate::hideOldPopup(QQuickPopup *popup)
{
    if (!popup)
        return;
 
    qCDebug(lcItemManagement) << "hiding old popup" << popup;
 
    popup->setVisible(false);
    popup->setParentItem(nullptr);
#if QT_CONFIG(accessibility)
    // Remove the item from the accessibility tree.
    QQuickAccessibleAttached *accessible = accessibleAttached(popup);
    if (accessible)
        accessible->setIgnored(true);
#endif
}
 
QQuickComboBox::QQuickComboBox(QQuickItem *parent)
    : QQuickControl(*(new QQuickComboBoxPrivate), parent)
{
    setFocusPolicy(Qt::StrongFocus);
    setFlag(QQuickItem::ItemIsFocusScope);
    setAcceptedMouseButtons(Qt::LeftButton);
#if QT_CONFIG(cursor)
    setCursor(Qt::ArrowCursor);
#endif
    Q_D(QQuickComboBox);
    d->setInputMethodHints(Qt::ImhNoPredictiveText, true);
    d->setSizePolicy(QLayoutPolicy::Preferred, QLayoutPolicy::Fixed);
}
 
QQuickComboBox::~QQuickComboBox()
{
    Q_D(QQuickComboBox);
    d->removeImplicitSizeListener(d->indicator);
    if (d->popup) {
        // Disconnect visibleChanged() to avoid a spurious highlightedIndexChanged() signal
        // emission during the destruction of the (visible) popup. (QTBUG-57650)
        QObjectPrivate::disconnect(d->popup.data(), &QQuickPopup::visibleChanged, d, &QQuickComboBoxPrivate::popupVisibleChanged);
        QQuickComboBoxPrivate::hideOldPopup(d->popup);
        d->popup = nullptr;
    }
}
 
int QQuickComboBox::count() const
{
    Q_D(const QQuickComboBox);
    return d->delegateModel ? d->delegateModel->count() : 0;
}
 
QVariant QQuickComboBox::model() const
{
    Q_D(const QQuickComboBox);
    return d->model;
}
 
void QQuickComboBox::setModel(const QVariant& m)
{
    Q_D(QQuickComboBox);
    QVariant model = m;
    if (model.userType() == qMetaTypeId<QJSValue>())
        model = model.value<QJSValue>().toVariant();
 
    if (d->model == model)
        return;
 
    if (QAbstractItemModel* aim = qvariant_cast<QAbstractItemModel *>(d->model)) {
        QObjectPrivate::disconnect(aim, &QAbstractItemModel::dataChanged,
            d, QOverload<>::of(&QQuickComboBoxPrivate::updateCurrentTextAndValue));
    }
    if (QAbstractItemModel* aim = qvariant_cast<QAbstractItemModel *>(model)) {
        QObjectPrivate::connect(aim, &QAbstractItemModel::dataChanged,
            d, QOverload<>::of(&QQuickComboBoxPrivate::updateCurrentTextAndValue));
    }
 
    d->model = model;
    d->createDelegateModel();
    emit countChanged();
    if (isComponentComplete()) {
        setCurrentIndex(count() > 0 ? 0 : -1);
        d->updateCurrentTextAndValue();
    }
    emit modelChanged();
 
    d->maybeUpdateImplicitContentWidth();
}
 
QQmlInstanceModel *QQuickComboBox::delegateModel() const
{
    Q_D(const QQuickComboBox);
    return d->delegateModel;
}
 
 
bool QQuickComboBox::isPressed() const
{
    Q_D(const QQuickComboBox);
    return d->pressed;
}
 
void QQuickComboBox::setPressed(bool pressed)
{
    Q_D(QQuickComboBox);
    if (d->pressed == pressed)
        return;
 
    d->pressed = pressed;
    emit pressedChanged();
 
    if (!d->hasDown) {
        setDown(d->pressed || d->isPopupVisible());
        d->hasDown = false;
    }
}
 
int QQuickComboBox::highlightedIndex() const
{
    Q_D(const QQuickComboBox);
    return d->highlightedIndex;
}
 
int QQuickComboBox::currentIndex() const
{
    Q_D(const QQuickComboBox);
    return d->currentIndex;
}
 
void QQuickComboBox::setCurrentIndex(int index)
{
    Q_D(QQuickComboBox);
    d->hasCurrentIndex = true;
    d->setCurrentIndex(index, NoActivate);
}
 
QString QQuickComboBox::currentText() const
{
    Q_D(const QQuickComboBox);
    return d->currentText;
}
 
QString QQuickComboBox::displayText() const
{
    Q_D(const QQuickComboBox);
    return d->displayText;
}
 
void QQuickComboBox::setDisplayText(const QString &text)
{
    Q_D(QQuickComboBox);
    d->hasDisplayText = true;
    if (d->displayText == text)
        return;
 
    d->displayText = text;
    maybeSetAccessibleName(text);
    emit displayTextChanged();
}
 
void QQuickComboBox::resetDisplayText()
{
    Q_D(QQuickComboBox);
    if (!d->hasDisplayText)
        return;
 
    d->hasDisplayText = false;
    d->updateCurrentText();
}
 
 
QString QQuickComboBox::textRole() const
{
    Q_D(const QQuickComboBox);
    return d->textRole;
}
 
void QQuickComboBox::setTextRole(const QString &role)
{
    Q_D(QQuickComboBox);
    if (d->textRole == role)
        return;
 
    d->textRole = role;
    if (isComponentComplete())
        d->updateCurrentText();
    emit textRoleChanged();
}
 
QString QQuickComboBox::valueRole() const
{
    Q_D(const QQuickComboBox);
    return d->valueRole;
}
 
void QQuickComboBox::setValueRole(const QString &role)
{
    Q_D(QQuickComboBox);
    if (d->valueRole == role)
        return;
 
    d->valueRole = role;
    if (isComponentComplete())
        d->updateCurrentValue();
    emit valueRoleChanged();
}
 
QQmlComponent *QQuickComboBox::delegate() const
{
    Q_D(const QQuickComboBox);
    return d->delegate;
}
 
void QQuickComboBox::setDelegate(QQmlComponent* delegate)
{
    Q_D(QQuickComboBox);
    if (d->delegate == delegate)
        return;
 
    delete d->delegate;
    d->delegate = delegate;
    QQmlDelegateModel *delegateModel = qobject_cast<QQmlDelegateModel*>(d->delegateModel);
    if (delegateModel)
        delegateModel->setDelegate(d->delegate);
    emit delegateChanged();
}
 
QQuickItem *QQuickComboBox::indicator() const
{
    QQuickComboBoxPrivate *d = const_cast<QQuickComboBoxPrivate *>(d_func());
    if (!d->indicator)
        d->executeIndicator();
    return d->indicator;
}
 
void QQuickComboBox::setIndicator(QQuickItem *indicator)
{
    Q_D(QQuickComboBox);
    if (d->indicator == indicator)
        return;
 
    QQuickControlPrivate::warnIfCustomizationNotSupported(this, indicator, QStringLiteral("indicator"));
 
    if (!d->indicator.isExecuting())
        d->cancelIndicator();
 
    const qreal oldImplicitIndicatorWidth = implicitIndicatorWidth();
    const qreal oldImplicitIndicatorHeight = implicitIndicatorHeight();
 
    d->removeImplicitSizeListener(d->indicator);
    QQuickControlPrivate::hideOldItem(d->indicator);
    d->indicator = indicator;
    if (indicator) {
        if (!indicator->parentItem())
            indicator->setParentItem(this);
        d->addImplicitSizeListener(indicator);
    }
 
    if (!qFuzzyCompare(oldImplicitIndicatorWidth, implicitIndicatorWidth()))
        emit implicitIndicatorWidthChanged();
    if (!qFuzzyCompare(oldImplicitIndicatorHeight, implicitIndicatorHeight()))
        emit implicitIndicatorHeightChanged();
    if (!d->indicator.isExecuting())
        emit indicatorChanged();
}
 
QQuickPopup *QQuickComboBox::popup() const
{
    QQuickComboBoxPrivate *d = const_cast<QQuickComboBoxPrivate *>(d_func());
    if (!d->popup)
        d->executePopup(isComponentComplete());
    return d->popup;
}
 
void QQuickComboBox::setPopup(QQuickPopup *popup)
{
    Q_D(QQuickComboBox);
    if (d->popup == popup)
        return;
 
    if (!d->popup.isExecuting())
        d->cancelPopup();
 
    if (d->popup) {
        QObjectPrivate::disconnect(d->popup.data(), &QQuickPopup::destroyed, d, &QQuickComboBoxPrivate::popupDestroyed);
        QObjectPrivate::disconnect(d->popup.data(), &QQuickPopup::visibleChanged, d, &QQuickComboBoxPrivate::popupVisibleChanged);
        QQuickComboBoxPrivate::hideOldPopup(d->popup);
    }
    if (popup) {
        QQuickPopupPrivate::get(popup)->allowVerticalFlip = true;
        popup->setClosePolicy(QQuickPopup::CloseOnEscape | QQuickPopup::CloseOnPressOutsideParent);
        QObjectPrivate::connect(popup, &QQuickPopup::visibleChanged, d, &QQuickComboBoxPrivate::popupVisibleChanged);
        // QQuickPopup does not derive from QQuickItemChangeListener, so we cannot use
        // QQuickItemChangeListener::itemDestroyed so we have to use QObject::destroyed
        QObjectPrivate::connect(popup, &QQuickPopup::destroyed, d, &QQuickComboBoxPrivate::popupDestroyed);
 
#if QT_CONFIG(quick_itemview)
        if (QQuickItemView *itemView = popup->findChild<QQuickItemView *>())
            itemView->setHighlightRangeMode(QQuickItemView::NoHighlightRange);
#endif
    }
    d->popup = popup;
    if (!d->popup.isExecuting())
        emit popupChanged();
}
 
bool QQuickComboBox::isFlat() const
{
    Q_D(const QQuickComboBox);
    return d->flat;
}
 
void QQuickComboBox::setFlat(bool flat)
{
    Q_D(QQuickComboBox);
    if (d->flat == flat)
        return;
 
    d->flat = flat;
    emit flatChanged();
}
 
bool QQuickComboBox::isDown() const
{
    Q_D(const QQuickComboBox);
    return d->down;
}
 
void QQuickComboBox::setDown(bool down)
{
    Q_D(QQuickComboBox);
    d->hasDown = true;
 
    if (d->down == down)
        return;
 
    d->down = down;
    emit downChanged();
}
 
void QQuickComboBox::resetDown()
{
    Q_D(QQuickComboBox);
    if (!d->hasDown)
        return;
 
    setDown(d->pressed || d->isPopupVisible());
    d->hasDown = false;
}
 
bool QQuickComboBox::isEditable() const
{
    Q_D(const QQuickComboBox);
    return d->extra.isAllocated() && d->extra->editable;
}
 
void QQuickComboBox::setEditable(bool editable)
{
    Q_D(QQuickComboBox);
    if (editable == isEditable())
        return;
 
    if (d->contentItem) {
        if (editable) {
            d->contentItem->installEventFilter(this);
            if (QQuickTextInput *input = qobject_cast<QQuickTextInput *>(d->contentItem)) {
                QObjectPrivate::connect(input, &QQuickTextInput::textChanged, d, &QQuickComboBoxPrivate::updateEditText);
                QObjectPrivate::connect(input, &QQuickTextInput::accepted, d, &QQuickComboBoxPrivate::acceptInput);
            }
#if QT_CONFIG(cursor)
            d->contentItem->setCursor(Qt::IBeamCursor);
#endif
        } else {
            d->contentItem->removeEventFilter(this);
            if (QQuickTextInput *input = qobject_cast<QQuickTextInput *>(d->contentItem)) {
                QObjectPrivate::disconnect(input, &QQuickTextInput::textChanged, d, &QQuickComboBoxPrivate::updateEditText);
                QObjectPrivate::disconnect(input, &QQuickTextInput::accepted, d, &QQuickComboBoxPrivate::acceptInput);
            }
#if QT_CONFIG(cursor)
            d->contentItem->unsetCursor();
#endif
        }
    }
 
    d->extra.value().editable = editable;
    setAccessibleProperty("editable", editable);
    emit editableChanged();
}
 
QString QQuickComboBox::editText() const
{
    Q_D(const QQuickComboBox);
    return d->extra.isAllocated() ? d->extra->editText : QString();
}
 
void QQuickComboBox::setEditText(const QString &text)
{
    Q_D(QQuickComboBox);
    if (text == editText())
        return;
 
    d->extra.value().editText = text;
    emit editTextChanged();
}
 
void QQuickComboBox::resetEditText()
{
    setEditText(QString());
}
 
#if QT_CONFIG(validator)
QValidator *QQuickComboBox::validator() const
{
    Q_D(const QQuickComboBox);
    return d->extra.isAllocated() ? d->extra->validator : nullptr;
}
 
void QQuickComboBox::setValidator(QValidator *validator)
{
    Q_D(QQuickComboBox);
    if (validator == QQuickComboBox::validator())
        return;
 
    d->extra.value().validator = validator;
#if QT_CONFIG(validator)
    if (validator)
        validator->setLocale(d->locale);
#endif
    emit validatorChanged();
}
#endif
 
Qt::InputMethodHints QQuickComboBox::inputMethodHints() const
{
    Q_D(const QQuickComboBox);
    return d->extra.isAllocated() ? d->extra->inputMethodHints : Qt::ImhNoPredictiveText;
}
 
void QQuickComboBox::setInputMethodHints(Qt::InputMethodHints hints)
{
    Q_D(QQuickComboBox);
    d->setInputMethodHints(hints);
}
 
bool QQuickComboBox::isInputMethodComposing() const
{
    Q_D(const QQuickComboBox);
    return d->contentItem && d->contentItem->property("inputMethodComposing").toBool();
}
 
bool QQuickComboBox::hasAcceptableInput() const
{
    Q_D(const QQuickComboBox);
    return d->m_acceptableInput;
}
 
qreal QQuickComboBox::implicitIndicatorWidth() const
{
    Q_D(const QQuickComboBox);
    if (!d->indicator)
        return 0;
    return d->indicator->implicitWidth();
}
 
qreal QQuickComboBox::implicitIndicatorHeight() const
{
    Q_D(const QQuickComboBox);
    if (!d->indicator)
        return 0;
    return d->indicator->implicitHeight();
}
 
QVariant QQuickComboBox::currentValue() const
{
    Q_D(const QQuickComboBox);
    return d->currentValue;
}
 
QVariant QQuickComboBox::valueAt(int index) const
{
    Q_D(const QQuickComboBox);
    if (!d->isValidIndex(index))
        return QVariant();
 
    const QString effectiveValueRole = d->valueRole.isEmpty() ? QStringLiteral("modelData") : d->valueRole;
    return d->delegateModel->variantValue(index, effectiveValueRole);
}
 
int QQuickComboBox::indexOfValue(const QVariant &value) const
{
    for (int i = 0; i < count(); ++i) {
        const QVariant ourValue = valueAt(i);
        if (value == ourValue)
            return i;
    }
    return -1;
}
 
bool QQuickComboBox::selectTextByMouse() const
{
    Q_D(const QQuickComboBox);
    return d->extra.isAllocated() ? d->extra->selectTextByMouse : false;
}
 
void QQuickComboBox::setSelectTextByMouse(bool canSelect)
{
    Q_D(QQuickComboBox);
    if (canSelect == selectTextByMouse())
        return;
 
    d->extra.value().selectTextByMouse = canSelect;
    emit selectTextByMouseChanged();
}
 
QQuickComboBox::ImplicitContentWidthPolicy QQuickComboBox::implicitContentWidthPolicy() const
{
    Q_D(const QQuickComboBox);
    return d->implicitContentWidthPolicy;
}
 
void QQuickComboBox::setImplicitContentWidthPolicy(QQuickComboBox::ImplicitContentWidthPolicy policy)
{
    Q_D(QQuickComboBox);
    if (policy == d->implicitContentWidthPolicy)
        return;
 
    d->implicitContentWidthPolicy = policy;
    d->maybeUpdateImplicitContentWidth();
    emit implicitContentWidthPolicyChanged();
}
QString QQuickComboBox::textAt(int index) const
{
    Q_D(const QQuickComboBox);
    if (!d->isValidIndex(index))
        return QString();
 
    return d->delegateModel->stringValue(index, d->effectiveTextRole());
}
 
int QQuickComboBox::find(const QString &text, Qt::MatchFlags flags) const
{
    Q_D(const QQuickComboBox);
    return d->match(0, text, flags);
}
 
void QQuickComboBox::incrementCurrentIndex()
{
    Q_D(QQuickComboBox);
    d->incrementCurrentIndex();
}
 
void QQuickComboBox::decrementCurrentIndex()
{
    Q_D(QQuickComboBox);
    d->decrementCurrentIndex();
}
 
void QQuickComboBox::selectAll()
{
    Q_D(QQuickComboBox);
    QQuickTextInput *input = qobject_cast<QQuickTextInput *>(d->contentItem);
    if (!input)
        return;
    input->selectAll();
}
 
bool QQuickComboBox::eventFilter(QObject *object, QEvent *event)
{
    Q_D(QQuickComboBox);
    switch (event->type()) {
    case QEvent::MouseButtonRelease:
        if (d->isPopupVisible())
            d->hidePopup(false);
        break;
    case QEvent::KeyPress: {
        QKeyEvent *ke = static_cast<QKeyEvent *>(event);
        if (d->filterKeyEvent(ke, false))
            return true;
        event->accept();
        if (d->extra.isAllocated())
            d->extra->allowComplete = ke->key() != Qt::Key_Backspace && ke->key() != Qt::Key_Delete;
        break;
    }
    case QEvent::FocusOut:
        if (qGuiApp->focusObject() != this && (!d->popup || !d->popup->hasActiveFocus())) {
            // Only close the popup if focus was transferred somewhere else
            // than to the popup or the popup button (which normally means that
            // the user clicked on the popup button to open it, not close it).
            d->hidePopup(false);
            setPressed(false);
 
            // The focus left the text field, so if the edit text matches an item in the model,
            // change our currentIndex to that. This matches widgets' behavior.
            const int indexForEditText = find(d->extra.value().editText, Qt::MatchFixedString);
            if (indexForEditText > -1)
                setCurrentIndex(indexForEditText);
        }
        break;
#if QT_CONFIG(im)
    case QEvent::InputMethod:
        if (d->extra.isAllocated())
            d->extra->allowComplete = !static_cast<QInputMethodEvent*>(event)->commitString().isEmpty();
        break;
#endif
    default:
        break;
    }
    return QQuickControl::eventFilter(object, event);
}
 
void QQuickComboBox::focusInEvent(QFocusEvent *event)
{
    Q_D(QQuickComboBox);
    QQuickControl::focusInEvent(event);
    // Setting focus on TextField should not be done when drop down indicator was clicked
    // That is why, if focus is not set with key reason, it should not be passed to textEdit by default.
    // Focus on Edit Text should be set only intentionally by user.
    if ((event->reason() == Qt::TabFocusReason || event->reason() == Qt::BacktabFocusReason ||
            event->reason() == Qt::ShortcutFocusReason) && d->contentItem && isEditable())
        d->contentItem->forceActiveFocus(event->reason());
}
 
void QQuickComboBox::focusOutEvent(QFocusEvent *event)
{
    Q_D(QQuickComboBox);
    QQuickControl::focusOutEvent(event);
 
    if (qGuiApp->focusObject() != d->contentItem && (!d->popup || !d->popup->hasActiveFocus())) {
        // Only close the popup if focus was transferred
        // somewhere else than to the popup or the inner line edit (which is
        // normally done from QQuickComboBox::focusInEvent).
        d->hidePopup(false);
        setPressed(false);
    }
}
 
#if QT_CONFIG(im)
void QQuickComboBox::inputMethodEvent(QInputMethodEvent *event)
{
    Q_D(QQuickComboBox);
    QQuickControl::inputMethodEvent(event);
    if (!isEditable() && !event->commitString().isEmpty())
        d->keySearch(event->commitString());
    else
        event->ignore();
}
#endif
 
void QQuickComboBox::keyPressEvent(QKeyEvent *event)
{
    Q_D(QQuickComboBox);
    QQuickControl::keyPressEvent(event);
 
    const auto key = event->key();
    if (!isEditable()) {
        const auto buttonPressKeys = QGuiApplicationPrivate::platformTheme()->themeHint(QPlatformTheme::ButtonPressKeys).value<QList<Qt::Key>>();
        if (buttonPressKeys.contains(key)) {
            if (!event->isAutoRepeat())
                setPressed(true);
            event->accept();
            return;
        }
    }
 
    switch (key) {
    case Qt::Key_Escape:
    case Qt::Key_Back:
        if (d->isPopupVisible())
            event->accept();
        break;
    case Qt::Key_Enter:
    case Qt::Key_Return:
        if (d->isPopupVisible())
            setPressed(true);
        event->accept();
        break;
    case Qt::Key_Up:
        d->keyNavigating = true;
        d->decrementCurrentIndex();
        event->accept();
        break;
    case Qt::Key_Down:
        d->keyNavigating = true;
        d->incrementCurrentIndex();
        event->accept();
        break;
    case Qt::Key_Home:
        d->keyNavigating = true;
        if (d->isPopupVisible())
            d->setHighlightedIndex(0, Highlight);
        else
            d->setCurrentIndex(0, Activate);
        event->accept();
        break;
    case Qt::Key_End:
        d->keyNavigating = true;
        if (d->isPopupVisible())
            d->setHighlightedIndex(count() - 1, Highlight);
        else
            d->setCurrentIndex(count() - 1, Activate);
        event->accept();
        break;
    default:
        if (!isEditable() && !event->text().isEmpty())
            d->keySearch(event->text());
        else
            event->ignore();
        break;
    }
}
 
void QQuickComboBox::keyReleaseEvent(QKeyEvent *event)
{
    Q_D(QQuickComboBox);
    QQuickControl::keyReleaseEvent(event);
    d->keyNavigating = false;
    if (event->isAutoRepeat())
        return;
 
    const auto key = event->key();
    if (!isEditable()) {
        const auto buttonPressKeys = QGuiApplicationPrivate::platformTheme()->themeHint(QPlatformTheme::ButtonPressKeys).value<QList<Qt::Key>>();
        if (buttonPressKeys.contains(key)) {
            if (!isEditable() && isPressed())
                d->togglePopup(true);
            setPressed(false);
            event->accept();
            return;
        }
    }
 
    switch (key) {
    case Qt::Key_Enter:
    case Qt::Key_Return:
        if (!isEditable() || d->isPopupVisible())
            d->hidePopup(d->isPopupVisible());
        setPressed(false);
        event->accept();
        break;
    case Qt::Key_Escape:
    case Qt::Key_Back:
        if (d->isPopupVisible()) {
            d->hidePopup(false);
            setPressed(false);
            event->accept();
        }
        break;
    default:
        break;
    }
}
 
#if QT_CONFIG(wheelevent)
void QQuickComboBox::wheelEvent(QWheelEvent *event)
{
    Q_D(QQuickComboBox);
    QQuickControl::wheelEvent(event);
    if (d->wheelEnabled && !d->isPopupVisible()) {
        if (event->angleDelta().y() > 0)
            d->decrementCurrentIndex();
        else
            d->incrementCurrentIndex();
    }
}
#endif
 
bool QQuickComboBox::event(QEvent *e)
{
    Q_D(QQuickComboBox);
    if (e->type() == QEvent::LanguageChange)
        d->updateCurrentTextAndValue();
    return QQuickControl::event(e);
}
 
void QQuickComboBox::componentComplete()
{
    Q_D(QQuickComboBox);
    d->executeIndicator(true);
    QQuickControl::componentComplete();
    if (d->popup)
        d->executePopup(true);
 
    if (d->delegateModel && d->ownModel)
        static_cast<QQmlDelegateModel *>(d->delegateModel)->componentComplete();
 
    if (count() > 0) {
        if (!d->hasCurrentIndex && d->currentIndex == -1)
            setCurrentIndex(0);
        else
            d->updateCurrentTextAndValue();
 
        // If the widest text was already calculated in the call to
        // QQmlDelegateModel::componentComplete() above, then we shouldn't do it here too.
        if (!d->hasCalculatedWidestText)
            d->maybeUpdateImplicitContentWidth();
    }
}
 
void QQuickComboBox::itemChange(QQuickItem::ItemChange change, const QQuickItem::ItemChangeData &value)
{
    Q_D(QQuickComboBox);
    QQuickControl::itemChange(change, value);
    if (change == ItemVisibleHasChanged && !value.boolValue) {
        d->hidePopup(false);
        setPressed(false);
    }
}
 
void QQuickComboBox::fontChange(const QFont &newFont, const QFont &oldFont)
{
    Q_D(QQuickComboBox);
    QQuickControl::fontChange(newFont, oldFont);
    d->maybeUpdateImplicitContentWidth();
}
 
void QQuickComboBox::contentItemChange(QQuickItem *newItem, QQuickItem *oldItem)
{
    Q_D(QQuickComboBox);
    if (oldItem) {
        oldItem->removeEventFilter(this);
        if (QQuickTextInput *oldInput = qobject_cast<QQuickTextInput *>(oldItem)) {
            QObjectPrivate::disconnect(oldInput, &QQuickTextInput::accepted, d, &QQuickComboBoxPrivate::acceptInput);
            QObjectPrivate::disconnect(oldInput, &QQuickTextInput::textChanged, d, &QQuickComboBoxPrivate::updateEditText);
            disconnect(oldInput, &QQuickTextInput::inputMethodComposingChanged, this, &QQuickComboBox::inputMethodComposingChanged);
            QObjectPrivate::disconnect(oldInput, &QQuickTextInput::acceptableInputChanged, d, &QQuickComboBoxPrivate::updateAcceptableInput);
        }
    }
    if (newItem && isEditable()) {
        newItem->installEventFilter(this);
        if (QQuickTextInput *newInput = qobject_cast<QQuickTextInput *>(newItem)) {
            QObjectPrivate::connect(newInput, &QQuickTextInput::accepted, d, &QQuickComboBoxPrivate::acceptInput);
            QObjectPrivate::connect(newInput, &QQuickTextInput::textChanged, d, &QQuickComboBoxPrivate::updateEditText);
            connect(newInput, &QQuickTextInput::inputMethodComposingChanged, this, &QQuickComboBox::inputMethodComposingChanged);
            QObjectPrivate::connect(newInput, &QQuickTextInput::acceptableInputChanged, d, &QQuickComboBoxPrivate::updateAcceptableInput);
        }
#if QT_CONFIG(cursor)
        newItem->setCursor(Qt::IBeamCursor);
#endif
    }
 
    d->updateAcceptableInput();
}
 
void QQuickComboBox::localeChange(const QLocale &newLocale, const QLocale &oldLocale)
{
    QQuickControl::localeChange(newLocale, oldLocale);
#if QT_CONFIG(validator)
    if (QValidator *v = validator())
        v->setLocale(newLocale);
#endif
}
 
QFont QQuickComboBox::defaultFont() const
{
    return QQuickTheme::font(QQuickTheme::ComboBox);
}
 
#if QT_CONFIG(accessibility)
QAccessible::Role QQuickComboBox::accessibleRole() const
{
    return QAccessible::ComboBox;
}
 
void QQuickComboBox::accessibilityActiveChanged(bool active)
{
    Q_D(QQuickComboBox);
    QQuickControl::accessibilityActiveChanged(active);
 
    if (active) {
        maybeSetAccessibleName(d->hasDisplayText ? d->displayText : d->currentText);
        setAccessibleProperty("editable", isEditable());
    }
}
#endif //
 
QT_END_NAMESPACE
 
#include "moc_qquickcombobox_p.cpp"