qcombobox.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

*/

void QComboBox::focusOutEvent(QFocusEvent *e)
{
    Q_D(QComboBox);
    update();
    if (d->lineEdit)
        d->lineEdit->event(e);
}

/*! \reimp */
void QComboBox::changeEvent(QEvent *e)
{
    Q_D(QComboBox);
    switch (e->type()) {
    case QEvent::StyleChange:
        d->sizeHint = QSize(); // invalidate size hint
        if (d->lineEdit)
            d->updateLineEditGeometry();
        //### need to update scrollers etc. as well here
        break;
    case QEvent::EnabledChange:
        if (!isEnabled())
            hidePopup();
        break;
    case QEvent::PaletteChange:
        d->viewContainer()->setPalette(palette());
        break;
    case QEvent::FontChange:
        d->sizeHint = QSize(); // invalidate size hint
        d->viewContainer()->setFont(font());
        if (d->lineEdit)
            d->updateLineEditGeometry();
        break;
    default:
        break;
    }
    QWidget::changeEvent(e);
}

/*!
    \reimp
*/

void QComboBox::resizeEvent(QResizeEvent *)
{
    Q_D(QComboBox);
    d->updateLineEditGeometry();
}

/*!
    \reimp
*/

void QComboBox::paintEvent(QPaintEvent *)
{
    Q_D(QComboBox);
    QStylePainter painter(this);
    painter.setPen(palette().color(QPalette::Text));

    // draw the combobox frame, focusrect and selected etc.
    QStyleOptionComboBox opt = d->getStyleOption();
    painter.drawComplexControl(QStyle::CC_ComboBox, opt);

    // draw the icon and text
    painter.drawControl(QStyle::CE_ComboBoxLabel, opt);
}

/*!
    \reimp
*/
void QComboBox::showEvent(QShowEvent *e)
{
    Q_D(QComboBox);
    if (!d->shownOnce && d->sizeAdjustPolicy == QComboBox::AdjustToContentsOnFirstShow) {
        d->sizeHint = QSize();
        updateGeometry();
    }
    d->shownOnce = true;
    QWidget::showEvent(e);
}

/*!
    \reimp
*/
void QComboBox::hideEvent(QHideEvent *)
{
    hidePopup();
}

/*!
    \reimp
*/
bool QComboBox::event(QEvent *event)
{
    Q_D(QComboBox);
    switch(event->type()) {
    case QEvent::HoverEnter:
    case QEvent::HoverLeave:
    case QEvent::HoverMove:
    if (const QHoverEvent *he = static_cast<const QHoverEvent *>(event))
        d->updateHoverControl(he->pos());
        break;
    case QEvent::ShortcutOverride:
        if (d->lineEdit)
            return d->lineEdit->event(event);
        break;
#ifdef QT_KEYPAD_NAVIGATION
    case QEvent::EnterEditFocus:
        if (!d->lineEdit)
            setEditFocus(false); // We never want edit focus if we are not editable
        break;
#endif
    default:
        break;
    }
    return QWidget::event(event);
}

/*!
    \reimp
*/
void QComboBox::mousePressEvent(QMouseEvent *e)
{
    Q_D(QComboBox);
    QStyleOptionComboBox opt = d->getStyleOption();
    QStyle::SubControl sc = style()->hitTestComplexControl(QStyle::CC_ComboBox, &opt, e->pos(),
                                                           this);
    if ((sc == QStyle::SC_ComboBoxArrow || !isEditable())
        && !d->viewContainer()->isVisible()) {
        if (sc == QStyle::SC_ComboBoxArrow)
            d->updateArrow(QStyle::State_Sunken);
        d->viewContainer()->blockMouseReleaseTimer.start(QApplication::doubleClickInterval());
        d->viewContainer()->initialClickPosition = e->pos();
        showPopup();
    }
}

/*!
    \reimp
*/
void QComboBox::mouseReleaseEvent(QMouseEvent *e)
{
    Q_D(QComboBox);
    Q_UNUSED(e);
    d->updateArrow(QStyle::State_None);
}

/*!
    \reimp
*/

void QComboBox::keyPressEvent(QKeyEvent *e)
{
    Q_D(QComboBox);
    int newIndex = currentIndex();
    switch (e->key()) {
    case Qt::Key_Delete:
    case Qt::Key_Backspace:
        // skip autoCompletion if Delete or Backspace has been pressed
        d->skipCompletion = true;
        break;
    case Qt::Key_PageUp:
    case Qt::Key_Up:
#ifdef QT_KEYPAD_NAVIGATION
        if (QApplication::keypadNavigationEnabled())
            e->ignore();
        else
#endif
        --newIndex;
        break;
    case Qt::Key_Down:
        if (e->modifiers() & Qt::AltModifier) {
            showPopup();
            return;
        }
        // fall through
    case Qt::Key_PageDown:
#ifdef QT_KEYPAD_NAVIGATION
        if (QApplication::keypadNavigationEnabled())
            e->ignore();
        else
#endif
        ++newIndex;
        break;
    case Qt::Key_Home:
        if (!d->lineEdit)
            newIndex = 0;
        break;
    case Qt::Key_End:
        if (!d->lineEdit)
            newIndex = count() - 1;
        break;
    case Qt::Key_F4:
        if (!e->modifiers()) {
            showPopup();
            return;
        }
        break;
    case Qt::Key_Space:
        if (!d->lineEdit) {
            showPopup();
            return;
        }
    case Qt::Key_Enter:
    case Qt::Key_Return:
    case Qt::Key_Escape:
        if (!d->lineEdit)
            e->ignore();
        break;
#ifdef QT_KEYPAD_NAVIGATION
    case Qt::Key_Select:
        if (QApplication::keypadNavigationEnabled()
                && (!hasEditFocus() || !d->lineEdit)) {
            showPopup();
            return;
        }
        break;
    case Qt::Key_Left:
        if (QApplication::keypadNavigationEnabled()
                && (!hasEditFocus() || !d->lineEdit))
            --newIndex;
        break;
    case Qt::Key_Right:
        if (QApplication::keypadNavigationEnabled()
                && (!hasEditFocus() || !d->lineEdit))
            ++newIndex;
        break;
    case Qt::Key_Back:
        if (QApplication::keypadNavigationEnabled()) {
            if (!hasEditFocus() || !d->lineEdit)
                e->ignore();
            else if (d->lineEdit && hasEditFocus())
                d->skipCompletion = true;
        }
        break;
#endif
    default:
        if (!d->lineEdit && !e->text().isEmpty()) {
            // use keyboardSearch from the listView so we do not duplicate code
            view()->setCurrentIndex(d->currentIndex);
            view()->keyboardSearch(e->text());
            if (view()->currentIndex().isValid()
                && view()->currentIndex() != d->currentIndex)
                newIndex = view()->currentIndex().row();
        }
    }

    if (newIndex >= 0 && newIndex < count() && newIndex != currentIndex()) {
        setCurrentIndex(newIndex);
        d->emitActivated(d->currentIndex);
    } else if (d->lineEdit) {
        d->lineEdit->event(e);
    }
}


/*!
    \reimp
*/

void QComboBox::keyReleaseEvent(QKeyEvent *e)
{
    Q_D(QComboBox);
    if (d->lineEdit)
        d->lineEdit->event(e);
}

/*!
    \reimp
*/
#ifndef QT_NO_WHEELEVENT
void QComboBox::wheelEvent(QWheelEvent *e)
{
    Q_D(QComboBox);
    if (!d->viewContainer()->isVisible()) {
        int newIndex = currentIndex();

        if (e->delta() > 0)
            --newIndex;
        else
            ++newIndex;

        if (newIndex >= 0 && newIndex < count()) {
            setCurrentIndex(newIndex);
            d->emitActivated(d->currentIndex);
        }
        e->accept();
    }
}
#endif

/*!
    \reimp
*/
void QComboBox::contextMenuEvent(QContextMenuEvent *e)
{
    Q_D(QComboBox);
    if (d->lineEdit) {
        Qt::ContextMenuPolicy p = d->lineEdit->contextMenuPolicy();
        d->lineEdit->setContextMenuPolicy(Qt::DefaultContextMenu);
        d->lineEdit->event(e);
        d->lineEdit->setContextMenuPolicy(p);
    }
}

/*!
    \reimp
*/
void QComboBox::inputMethodEvent(QInputMethodEvent *e)
{
    Q_D(QComboBox);
    if (d->lineEdit)
        d->lineEdit->event(e);
}

/*!
    \reimp
*/
QVariant QComboBox::inputMethodQuery(Qt::InputMethodQuery query) const
{
    Q_D(const QComboBox);
    if (d->lineEdit)
        return d->lineEdit->inputMethodQuery(query);
    return QWidget::inputMethodQuery(query);
}

/*!
    \fn bool QComboBox::editable() const

    Use isEditable() instead.
*/

/*!
    \fn void QComboBox::insertItem(const QPixmap &pixmap, int index)

    Use an insertItem() function that takes a QIcon instead, for
    example, insertItem(index, QIcon(pixmap)).
*/

/*!
    \fn void QComboBox::insertItem(const QPixmap &pixmap, const QString &text, int index)


    Use an insertItem() function that takes a QIcon instead, for
    example, insertItem(index, QIcon(pixmap), text).
*/

/*!
    \fn void QComboBox::changeItem(const QString &text, int index)

    Use setItemText() instead.
*/

/*!
    \fn void QComboBox::changeItem(const QPixmap &pixmap, int index)

    Use setItemIcon() instead, for example,
    setItemIcon(index, QIcon(pixmap)).
*/

/*!
    \fn void QComboBox::changeItem(const QPixmap &pixmap, const QString &text, int index)

    Use setItem() instead, for example, setItem(index, QIcon(pixmap),text).
*/

/*!
    \fn void QComboBox::addItem(const QString &text, const QVariant &userData)

    Adds an item to the combobox with the given \a text, and containing the
    specified \a userData. The item is appended to the list of existing items.
*/

/*!
    \fn void QComboBox::addItem(const QIcon &icon, const QString &text,
                                const QVariant &userData)

    Adds an item to the combobox with the given \a icon and \a text, and
    containing the specified \a userData. The item is appended to the list of
    existing items.
*/

/*!
    \fn void QComboBox::addItems(const QStringList &texts)

    Adds each of the strings in the given \a texts to the combobox. Each item
    is appended to the list of existing items in turn.
*/

/*!
    \fn void QComboBox::editTextChanged(const QString &text)

    This signal is emitted when the text in the combobox's line edit
    widget is changed. The new text is specified by \a text.
*/

/*!
    \fn QComboBox::InsertPolicy QComboBox::insertionPolicy() const
    \compat

    Use QComboBox::insertPolicy instead.
*/

/*!
    \fn void QComboBox::setInsertionPolicy(InsertPolicy policy)
    \compat

    Use QComboBox::insertPolicy instead.
*/

/*!
    \fn void QComboBox::setCurrentText(const QString &text)
    \compat

    Use setItemText() instead.

    \sa currentIndex()
*/

/*!
    \fn QString QComboBox::text(int index) const
    \compat

    Use itemText() instead.
*/

/*!
    \fn QPixmap QComboBox::pixmap(int index) const
    \compat

    Use itemIcon() instead.
*/

/*!
    \fn void QComboBox::insertStringList(const QStringList &list, int index)
    \compat

    Use insertItems() instead.
*/

/*!
    \fn void QComboBox::insertItem(const QString &text, int index)
    \compat
*/

/*!
    \fn void QComboBox::clearEdit()
    \compat

    Use clearEditText() instead.
*/


/*!
    \