qaccessiblewidgets.cpp

奇趣公司比较新的qt/emd版本

                    str = dockWidget()->isFloating() ? QDockWidget::tr("Dock")
                                                     : QDockWidget::tr("Float");
                }
                break;
            default:
                break;
            }
        }
    }
    return str;
}

bool QAccessibleTitleBar::doAction(int action, int child, const QVariantList& /*params*/)
{
    if (!child || !dockWidget()->isEnabled())
        return false;

    switch (action) {
    case DefaultAction:
    case Press: {
        QDockWidgetLayout *layout = dockWidgetLayout();
        QAbstractButton *btn = static_cast<QAbstractButton *>(layout->widget((QDockWidgetLayout::Role)child));
        if (btn)
            btn->animateClick();
        return true;
        break;}
    default:
        break;
    }

    return false;
}

int QAccessibleTitleBar::userActionCount (int /*child*/) const
{
    return 0;
}

QAccessible::Role QAccessibleTitleBar::role(int child) const
{
    switch (child) {
        case 0:
            return TitleBar;
            break;
        default:
            if (child >= 1 && child <= childCount())
                return PushButton;
            break;
    }

    return NoRole;
}

void QAccessibleTitleBar::setText(Text /*t*/, int /*child*/, const QString &/*text*/)
{

}

bool QAccessibleTitleBar::isValid() const
{
    return dockWidget();
}

#endif // QT_NO_DOCKWIDGET

#ifndef QT_NO_TEXTEDIT
void QAccessibleTextEdit::addSelection(int startOffset, int endOffset)
{
    setSelection(0, startOffset, endOffset);
}

QString QAccessibleTextEdit::attributes(int offset, int *startOffset, int *endOffset)
{
    // TODO - wait for a definition of attributes
    Q_UNUSED(offset);
    Q_UNUSED(startOffset);
    Q_UNUSED(endOffset);
    return QString();
}

int QAccessibleTextEdit::cursorPosition()
{
    return textEdit()->textCursor().position();
}

QRect QAccessibleTextEdit::characterRect(int offset, CoordinateType coordType)
{
    QTextEdit *edit = textEdit();
    QTextCursor cursor(edit->document());
    cursor.setPosition(offset);

    if (cursor.position() != offset)
        return QRect();

    QRect r = edit->cursorRect(cursor);
    if (cursor.movePosition(QTextCursor::NextCharacter)) {
        r.setWidth(edit->cursorRect(cursor).y() - r.y());
    } else {
        // we don't know the width of the character - maybe because we're at document end
        // in that case, IAccessible2 tells us to return the width of a default character
        int averageCharWidth = QFontMetrics(cursor.charFormat().font()).averageCharWidth();
        if (edit->layoutDirection() == Qt::RightToLeft)
            averageCharWidth *= -1;
        r.setWidth(averageCharWidth);
    }

    switch (coordType) {
    case RelativeToScreen:
        r.moveTo(edit->viewport()->mapToGlobal(r.topLeft()));
        break;
    case RelativeToParent:
        break;
    }

    return r;
}

int QAccessibleTextEdit::selectionCount()
{
    return textEdit()->textCursor().hasSelection() ? 1 : 0;
}

int QAccessibleTextEdit::offsetAtPoint(const QPoint &point, CoordinateType coordType)
{
    QTextEdit *edit = textEdit();

    QPoint p = point;
    if (coordType == RelativeToScreen)
        p = edit->viewport()->mapFromGlobal(p);
    // convert to document coordinates
    p += QPoint(edit->horizontalScrollBar()->value(), edit->verticalScrollBar()->value());

    return edit->document()->documentLayout()->hitTest(p, Qt::ExactHit);
}

void QAccessibleTextEdit::selection(int selectionIndex, int *startOffset, int *endOffset)
{
    *startOffset = *endOffset = 0;
    QTextCursor cursor = textEdit()->textCursor();

    if (selectionIndex != 0 || !cursor.hasSelection())
        return;

    *startOffset = cursor.selectionStart();
    *endOffset = cursor.selectionEnd();
}

QString QAccessibleTextEdit::text(int startOffset, int endOffset)
{
    QTextCursor cursor(textEdit()->document());

    cursor.setPosition(startOffset, QTextCursor::MoveAnchor);
    cursor.setPosition(endOffset, QTextCursor::KeepAnchor);

    return cursor.selectedText();
}

QString QAccessibleTextEdit::textBeforeOffset (int offset, BoundaryType boundaryType,
        int *startOffset, int *endOffset)
{
    // TODO - what exactly is before?
    Q_UNUSED(offset);
    Q_UNUSED(boundaryType);
    Q_UNUSED(startOffset);
    Q_UNUSED(endOffset);
    return QString();
}

QString QAccessibleTextEdit::textAfterOffset(int offset, BoundaryType boundaryType,
        int *startOffset, int *endOffset)
{
    // TODO - what exactly is after?
    Q_UNUSED(offset);
    Q_UNUSED(boundaryType);
    Q_UNUSED(startOffset);
    Q_UNUSED(endOffset);
    return QString();
}

QString QAccessibleTextEdit::textAtOffset(int offset, BoundaryType boundaryType,
                                          int *startOffset, int *endOffset)
{
    Q_ASSERT(startOffset);
    Q_ASSERT(endOffset);

    *startOffset = *endOffset = -1;
    QTextEdit *edit = textEdit();

    QTextCursor cursor(edit->document());
    if (offset >= characterCount())
        return QString();

    switch (boundaryType) {
    case CharBoundary:
        cursor.setPosition(offset);
        *startOffset = cursor.position();
        cursor.movePosition(QTextCursor::NextCharacter, QTextCursor::KeepAnchor);
        *endOffset = cursor.position();
        break;
    case WordBoundary:
        cursor.movePosition(QTextCursor::StartOfWord, QTextCursor::MoveAnchor);
        *startOffset = cursor.position();
        cursor.movePosition(QTextCursor::EndOfWord, QTextCursor::KeepAnchor);
        *endOffset = cursor.position();
        break;
    case SentenceBoundary:
        // TODO - what's a sentence?
        return QString();
    case LineBoundary:
        cursor.movePosition(QTextCursor::StartOfLine, QTextCursor::MoveAnchor);
        *startOffset = cursor.position();
        cursor.movePosition(QTextCursor::EndOfLine, QTextCursor::KeepAnchor);
        *endOffset = cursor.position();
        break;
    case ParagraphBoundary:
        cursor.movePosition(QTextCursor::StartOfBlock, QTextCursor::MoveAnchor);
        *startOffset = cursor.position();
        cursor.movePosition(QTextCursor::EndOfBlock, QTextCursor::KeepAnchor);
        *endOffset = cursor.position();
        break;
    case NoBoundary: {
        *startOffset = 0;
        const QString txt = edit->toPlainText();
        *endOffset = txt.count();
        return txt; }
    default:
        qDebug("AccessibleTextAdaptor::textAtOffset: Unknown boundary type %d", boundaryType);
        return QString();
    }

    return cursor.selectedText();
}

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

    QTextCursor cursor = textEdit()->textCursor();
    cursor.clearSelection();
    textEdit()->setTextCursor(cursor);
}

void QAccessibleTextEdit::setCursorPosition(int position)
{
    QTextCursor cursor = textEdit()->textCursor();
    cursor.setPosition(position);
    textEdit()->setTextCursor(cursor);
}

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

    QTextCursor cursor = textEdit()->textCursor();
    cursor.setPosition(startOffset, QTextCursor::MoveAnchor);
    cursor.setPosition(endOffset, QTextCursor::KeepAnchor);
    textEdit()->setTextCursor(cursor);
}

int QAccessibleTextEdit::characterCount()
{
    return textEdit()->toPlainText().count();
}

void QAccessibleTextEdit::scrollToSubstring(int startIndex, int endIndex)
{
    QTextEdit *edit = textEdit();

    QTextCursor cursor(edit->document());
    cursor.setPosition(startIndex);
    QRect r = edit->cursorRect(cursor);

    cursor.setPosition(endIndex);
    r.setBottomRight(edit->cursorRect(cursor).bottomRight());

    r.moveTo(r.x() + edit->horizontalScrollBar()->value(),
             r.y() + edit->verticalScrollBar()->value());

    // E V I L, but ensureVisible is not public
    if (!QMetaObject::invokeMethod(edit, "_q_ensureVisible", Q_ARG(QRectF, r)))
        qWarning("AccessibleTextEdit::scrollToSubstring failed!");
}

static QTextCursor cursorForRange(QTextEdit *textEdit, int startOffset, int endOffset)
{
    QTextCursor cursor(textEdit->document());
    cursor.setPosition(startOffset, QTextCursor::MoveAnchor);
    cursor.setPosition(endOffset, QTextCursor::KeepAnchor);

    return cursor;
}

void QAccessibleTextEdit::copyText(int startOffset, int endOffset)
{
    QTextCursor cursor = cursorForRange(textEdit(), startOffset, endOffset);

    if (!cursor.hasSelection())
        return;

//     QApplication::clipboard()->setMimeData(new QTextEditMimeData(cursor.selection()));
}

void QAccessibleTextEdit::deleteText(int startOffset, int endOffset)
{
    QTextCursor cursor = cursorForRange(textEdit(), startOffset, endOffset);

    cursor.removeSelectedText();
}

void QAccessibleTextEdit::insertText(int offset, const QString &text)
{
    QTextCursor cursor(textEdit()->document());
    cursor.setPosition(offset);

    cursor.insertText(text);
}

void QAccessibleTextEdit::cutText(int startOffset, int endOffset)
{
    QTextCursor cursor = cursorForRange(textEdit(), startOffset, endOffset);

    if (!cursor.hasSelection())
        return;

//     QApplication::clipboard()->setMimeData(new QTextEditMimeData(cursor.selection()));
    cursor.removeSelectedText();
}

void QAccessibleTextEdit::pasteText(int offset)
{
    QTextEdit *edit = textEdit();

    QTextCursor oldCursor = edit->textCursor();
    QTextCursor newCursor = oldCursor;
    newCursor.setPosition(offset);

    edit->setTextCursor(newCursor);
#ifndef QT_NO_CLIPBOARD
    edit->paste();
#endif
    edit->setTextCursor(oldCursor);
}

void QAccessibleTextEdit::replaceText(int startOffset, int endOffset, const QString &text)
{
    QTextCursor cursor = cursorForRange(textEdit(), startOffset, endOffset);

    cursor.removeSelectedText();
    cursor.insertText(text);
}

void QAccessibleTextEdit::setAttributes(int startOffset, int endOffset, const QString &attributes)
{
    // TODO
    Q_UNUSED(startOffset);
    Q_UNUSED(endOffset);
    Q_UNUSED(attributes);
}

#endif // QT_NO_TEXTEDIT

#ifndef QT_NO_MAINWINDOW
QAccessibleMainWindow::QAccessibleMainWindow(QWidget *widget)
    : QAccessibleWidgetEx(widget, Application) { }

QVariant QAccessibleMainWindow::invokeMethodEx(QAccessible::Method /*method*/, int /*child*/, const QVariantList & /*params*/)
{
    return QVariant();
}

int QAccessibleMainWindow::childCount() const
{
    QList<QWidget*> kids = childWidgets(mainWindow(), true);
    return kids.count();
}

int QAccessibleMainWindow::indexOfChild(const QAccessibleInterface *iface) const
{
    QList<QWidget*> kids = childWidgets(mainWindow(), true);
    int childIndex = kids.indexOf(static_cast<QWidget*>(iface->object()));
    return childIndex == -1 ? -1 : ++childIndex;
}

int QAccessibleMainWindow::navigate(RelationFlag relation, int entry, QAccessibleInterface **iface) const
{
    if (relation == Child && entry >= 1) {
        QList<QWidget*> kids = childWidgets(mainWindow(), true);
        if (entry <= kids.count()) {
            *iface = QAccessible::queryAccessibleInterface(kids.at(entry - 1));
            return *iface ? 0 : -1;
        }
    }
    return QAccessibleWidgetEx::navigate(relation, entry, iface);
}


QMainWindow *QAccessibleMainWindow::mainWindow() const
{
    return qobject_cast<QMainWindow *>(object());
}

#endif //QT_NO_MAINWINDOW


#endif // QT_NO_ACCESSIBILITY