simplewidgets.cpp

奇趣公司比较新的qt/emd版本

#ifndef QT_NO_MENU
            if (toolButton()->menu())
                return QToolButton::tr("Open");
#endif
            //fall through
        case 2:
            return QLatin1String("Set Focus");
        }
    }
    return QString();
}

/*!
    \internal
*/
bool QAccessibleToolButton::doAction(int action, int child, const QVariantList &params)
{
    if (!widget()->isEnabled() || !widget()->isVisible())
        return false;
    if (action == 1 || child == ButtonDropMenu) {
        if(!child)
            toolButton()->setDown(true);
#ifndef QT_NO_MENU
        toolButton()->showMenu();
#endif
        return true;
    }
    return QAccessibleButton::doAction(action, 0, params);
}

#endif // QT_NO_TOOLBUTTON

/*!
  \class QAccessibleDisplay qaccessiblewidget.h
  \brief The QAccessibleDisplay class implements the QAccessibleInterface for widgets that display information.
  \internal

  \ingroup accessibility
*/

/*!
  Constructs a QAccessibleDisplay object for \a w.
  \a role is propagated to the QAccessibleWidgetEx constructor.
*/
QAccessibleDisplay::QAccessibleDisplay(QWidget *w, Role role)
: QAccessibleWidgetEx(w, role)
{
}

/*! \reimp */
QAccessible::Role QAccessibleDisplay::role(int child) const
{
    QLabel *l = qobject_cast<QLabel*>(object());
    if (l) {
        if (l->pixmap())
            return Graphic;
#ifndef QT_NO_PICTURE
        if (l->picture())
            return Graphic;
#endif
#ifndef QT_NO_MOVIE
        if (l->movie())
            return Animation;
#endif
#ifndef QT_NO_PROGRESSBAR
    } else if (qobject_cast<QProgressBar*>(object())) {
        return ProgressBar;
#endif
    }
    return QAccessibleWidgetEx::role(child);
}

/*! \reimp */
QString QAccessibleDisplay::text(Text t, int child) const
{
    QString str;
    if (!widget()->isVisible())
        return str;
    switch (t) {
    case Name:
        str = widget()->accessibleName();
        if (str.isEmpty()) {
            if (qobject_cast<QLabel*>(object())) {
                str = qobject_cast<QLabel*>(object())->text();
#ifndef QT_NO_GROUPBOX
            } else if (qobject_cast<QGroupBox*>(object())) {
                str = qobject_cast<QGroupBox*>(object())->title();
#endif
#ifndef QT_NO_LCDNUMBER
            } else if (qobject_cast<QLCDNumber*>(object())) {
                QLCDNumber *l = qobject_cast<QLCDNumber*>(object());
                if (l->numDigits())
                    str = QString::number(l->value());
                else
                    str = QString::number(l->intValue());
#endif
            }
        }
        break;
    case Value:
#ifndef QT_NO_PROGRESSBAR
        if (qobject_cast<QProgressBar*>(object()))
            str = QString::number(qobject_cast<QProgressBar*>(object())->value());
#endif
        break;
    default:
        break;
    }
    if (str.isEmpty())
        str = QAccessibleWidgetEx::text(t, child);;
    return qt_accStripAmp(str);
}

/*! \reimp */
QAccessible::Relation QAccessibleDisplay::relationTo(int child, const QAccessibleInterface *other,
                                                     int otherChild) const
{
    Relation relation = QAccessibleWidgetEx::relationTo(child, other, otherChild);
    if (child || otherChild)
        return relation;

    QObject *o = other->object();
    QLabel *label = qobject_cast<QLabel*>(object());
    if (label) {
#ifndef QT_NO_SHORTCUT
        if (o == label->buddy())
            relation |= Label;
#endif
#ifndef QT_NO_GROUPBOX
    } else {
	QGroupBox *groupbox = qobject_cast<QGroupBox*>(object());
	if (groupbox && !groupbox->title().isEmpty())
	    if (groupbox->children().contains(o))
		relation |= Label;
#endif
    }
    return relation;
}

/*! \reimp */
int QAccessibleDisplay::navigate(RelationFlag rel, int entry, QAccessibleInterface **target) const
{
    *target = 0;
    if (rel == Labelled) {
        QObject *targetObject = 0;
        QLabel *label = qobject_cast<QLabel*>(object());
        if (label) {
#ifndef QT_NO_SHORTCUT
            if (entry == 1)
                targetObject = label->buddy();
#endif
#ifndef QT_NO_GROUPBOX
        } else {
	    QGroupBox *groupbox = qobject_cast<QGroupBox*>(object());
	    if (groupbox && !groupbox->title().isEmpty())
		rel = Child;
#endif
        }
        *target = QAccessible::queryAccessibleInterface(targetObject);
        if (*target)
            return 0;
    }
    return QAccessibleWidgetEx::navigate(rel, entry, target);
}

#ifndef QT_NO_LINEEDIT
/*!
  \class QAccessibleLineEdit qaccessiblewidget.h
  \brief The QAccessibleLineEdit class implements the QAccessibleInterface for widgets with editable text
  \internal

  \ingroup accessibility
*/

/*!
  Constructs a QAccessibleLineEdit object for \a w.
  \a name is propagated to the QAccessibleWidgetEx constructor.
*/
QAccessibleLineEdit::QAccessibleLineEdit(QWidget *w, const QString &name)
: QAccessibleWidgetEx(w, EditableText, name), QAccessibleSimpleEditableTextInterface(this)
{
    addControllingSignal(QLatin1String("textChanged(const QString&)"));
    addControllingSignal(QLatin1String("returnPressed()"));
}

/*! Returns the line edit. */
QLineEdit *QAccessibleLineEdit::lineEdit() const
{
    return qobject_cast<QLineEdit*>(object());
}

/*! \reimp */
QString QAccessibleLineEdit::text(Text t, int child) const
{
    QString str;
    if (!lineEdit()->isVisible())
        return str;
    switch (t) {
    case Value:
        str = lineEdit()->text();
        break;
    default:
        break;
    }
    if (str.isEmpty())
        str = QAccessibleWidgetEx::text(t, child);;
    return qt_accStripAmp(str);
}

/*! \reimp */
void QAccessibleLineEdit::setText(Text t, int control, const QString &text)
{
    if (!lineEdit()->isVisible())
        return;
    if (t != Value || control) {
        QAccessibleWidgetEx::setText(t, control, text);
        return;
    }
    lineEdit()->setText(text);
}

/*! \reimp */
QAccessible::State QAccessibleLineEdit::state(int child) const
{
    State state = QAccessibleWidgetEx::state(child);

    QLineEdit *l = lineEdit();
    if (l->isReadOnly())
        state |= ReadOnly;
    if (l->echoMode() == QLineEdit::Password)
        state |= Protected;
    state |= Selectable;
    if (l->hasSelectedText())
        state |= Selected;

    if (l->contextMenuPolicy() != Qt::NoContextMenu
        && l->contextMenuPolicy() != Qt::PreventContextMenu)
        state |= HasPopup;

    return state;
}

QVariant QAccessibleLineEdit::invokeMethodEx(QAccessible::Method method, int child,
                                                     const QVariantList &params)
{
    if (child)
        return QVariant();

    switch (method) {
    case ListSupportedMethods: {
        QSet<QAccessible::Method> set;
        set << ListSupportedMethods << SetCursorPosition << GetCursorPosition;
        return qVariantFromValue(set | qvariant_cast<QSet<QAccessible::Method> >(
                QAccessibleWidgetEx::invokeMethodEx(method, child, params)));
    }
    case SetCursorPosition:
        setCursorPosition(params.value(0).toInt());
        return true;
    case GetCursorPosition:
        return cursorPosition();
    default:
        return QAccessibleWidgetEx::invokeMethodEx(method, child, params);
    }
}

void QAccessibleLineEdit::addSelection(int startOffset, int endOffset)
{
    setSelection(0, startOffset, endOffset);
}

QString QAccessibleLineEdit::attributes(int offset, int *startOffset, int *endOffset)
{
    // QLineEdit doesn't have text attributes
    *startOffset = *endOffset = offset;
    return QString();
}

int QAccessibleLineEdit::cursorPosition()
{
    return lineEdit()->cursorPosition();
}

QRect QAccessibleLineEdit::characterRect(int /*offset*/, CoordinateType /*coordType*/)
{
    // QLineEdit doesn't hand out character rects
    return QRect();
}

int QAccessibleLineEdit::selectionCount()
{
    return lineEdit()->hasSelectedText() ? 1 : 0;
}

int QAccessibleLineEdit::offsetAtPoint(const QPoint &point, CoordinateType coordType)
{
    QPoint p = point;
    if (coordType == RelativeToScreen)
        p = lineEdit()->mapFromGlobal(p);

    return lineEdit()->cursorPositionAt(p);
}

void QAccessibleLineEdit::selection(int selectionIndex, int *startOffset, int *endOffset)
{
    *startOffset = *endOffset = 0;
    if (selectionIndex != 0)
        return;

    *startOffset = lineEdit()->selectionStart();
    *endOffset = *startOffset + lineEdit()->selectedText().count();
}

QString QAccessibleLineEdit::text(int startOffset, int endOffset)
{
    if (startOffset > endOffset)
        return QString();
    return lineEdit()->text().mid(startOffset, endOffset - startOffset);
}

QString QAccessibleLineEdit::textBeforeOffset (int /*offset*/, BoundaryType /*boundaryType*/,
        int * /*startOffset*/, int * /*endOffset*/)
{
    // TODO
    return QString();
}

QString QAccessibleLineEdit::textAfterOffset(int /*offset*/, BoundaryType /*boundaryType*/,
        int * /*startOffset*/, int * /*endOffset*/)
{
    // TODO
    return QString();
}

QString QAccessibleLineEdit::textAtOffset(int /*offset*/, BoundaryType /*boundaryType*/,
        int * /*startOffset*/, int * /*endOffset*/)
{
    // TODO
    return QString();
}

void QAccessibleLineEdit::removeSelection(int selectionIndex)
{
    if (selectionIndex != 0)
        return;

    lineEdit()->deselect();
}

void QAccessibleLineEdit::setCursorPosition(int position)
{
    lineEdit()->setCursorPosition(position);
}

void QAccessibleLineEdit::setSelection(int selectionIndex, int startOffset, int endOffset)
{
    if (selectionIndex != 0)
        return;

    lineEdit()->setSelection(startOffset, endOffset - startOffset);
}

int QAccessibleLineEdit::characterCount()
{
    return lineEdit()->text().count();
}

void QAccessibleLineEdit::scrollToSubstring(int startIndex, int endIndex)
{
    lineEdit()->setCursorPosition(endIndex);
    lineEdit()->setCursorPosition(startIndex);
}


#endif // QT_NO_LINEEDIT
#endif // QT_NO_ACCESSIBILITY