qlineedit.cpp

奇趣公司比较新的qt/emd版本

    }
    else if (event == QKeySequence::Paste) {
        if (!d->readOnly)
            paste();
    }
    else if (event == QKeySequence::Cut) {
        if (!d->readOnly) {
            cut();
        }
    }
    else if (event == QKeySequence::DeleteEndOfLine) {
        if (!d->readOnly) {
            setSelection(d->cursor, d->text.size());
            copy();
            del();
        }
    }
#endif //QT_NO_CLIPBOARD
    else if (event == QKeySequence::MoveToStartOfLine) {
        home(0);
    }
    else if (event == QKeySequence::MoveToEndOfLine) {
        end(0);
    }
    else if (event == QKeySequence::SelectStartOfLine) {
        home(1);
    }
    else if (event == QKeySequence::SelectEndOfLine) {
        end(1);
    }
    else if (event == QKeySequence::MoveToNextChar) {
#ifndef Q_WS_WIN
        if (d->hasSelectedText()) {
#else
        if (d->hasSelectedText() && d->completer
            && d->completer->completionMode() == QCompleter::InlineCompletion) {
#endif
            d->moveCursor(d->selend, false);
        } else {
            cursorForward(0, layoutDirection() == Qt::LeftToRight ? 1 : -1);
        }
    }
    else if (event == QKeySequence::SelectNextChar) {
        cursorForward(1, layoutDirection() == Qt::LeftToRight ? 1 : -1);
    }
    else if (event == QKeySequence::MoveToPreviousChar) {
#ifndef Q_WS_WIN
        if (d->hasSelectedText()) {
#else
        if (d->hasSelectedText() && d->completer
            && d->completer->completionMode() == QCompleter::InlineCompletion) {
#endif
            d->moveCursor(d->selstart, false);
        } else {
            cursorBackward(0, layoutDirection() == Qt::LeftToRight ? 1 : -1);
        }
    }
    else if (event == QKeySequence::SelectPreviousChar) {
        cursorBackward(1, layoutDirection() == Qt::LeftToRight ? 1 : -1);
    }
    else if (event == QKeySequence::MoveToNextWord) {
        if (echoMode() == Normal)
            layoutDirection() == Qt::LeftToRight ? cursorWordForward(0) : cursorWordBackward(0);
        else
            layoutDirection() == Qt::LeftToRight ? end(0) : home(0);
    }
    else if (event == QKeySequence::MoveToPreviousWord) {
        if (echoMode() == Normal)
            layoutDirection() == Qt::LeftToRight ? cursorWordBackward(0) : cursorWordForward(0);
        else if (!d->readOnly) {
            layoutDirection() == Qt::LeftToRight ? home(0) : end(0);
        }
    }
    else if (event == QKeySequence::SelectNextWord) {
        if (echoMode() == Normal)
            layoutDirection() == Qt::LeftToRight ? cursorWordForward(1) : cursorWordBackward(1);
        else
            layoutDirection() == Qt::LeftToRight ? end(1) : home(1);
    }
    else if (event == QKeySequence::SelectPreviousWord) {
        if (echoMode() == Normal)
            layoutDirection() == Qt::LeftToRight ? cursorWordBackward(1) : cursorWordForward(1);
        else
            layoutDirection() == Qt::LeftToRight ? home(1) : end(1);
    }
    else if (event == QKeySequence::Delete) {
        if (!d->readOnly)
            del();
    }
    else if (event == QKeySequence::DeleteEndOfWord) {
        if (!d->readOnly) {
            cursorWordForward(true);
            del();
        }
    }
    else if (event == QKeySequence::DeleteStartOfWord) {
        if (!d->readOnly) {
            cursorWordBackward(true);
            del();
        }
    }
#endif // QT_NO_SHORTCUT
    else {
#ifdef Q_WS_MAC
        if (event->key() == Qt::Key_Up || event->key() == Qt::Key_Down) {
            Qt::KeyboardModifiers myModifiers = (event->modifiers() & ~Qt::KeypadModifier);
            if (myModifiers & Qt::ShiftModifier) {
                if (myModifiers == (Qt::ControlModifier|Qt::ShiftModifier)
                        || myModifiers == (Qt::AltModifier|Qt::ShiftModifier)
                        || myModifiers == Qt::ShiftModifier) {

                    event->key() == Qt::Key_Up ? home(1) : end(1);
                }
            } else {
                if ((myModifiers == Qt::ControlModifier
                     || myModifiers == Qt::AltModifier
                     || myModifiers == Qt::NoModifier)) {
                    event->key() == Qt::Key_Up ? home(0) : end(0);
                }
            }
        }
#endif
        if (event->modifiers() & Qt::ControlModifier) {
            switch (event->key()) {
            case Qt::Key_Backspace:
                if (!d->readOnly) {
                    cursorWordBackward(true);
                    del();
                }
                break;
#ifndef QT_NO_COMPLETER
            case Qt::Key_Up:
            case Qt::Key_Down:
                d->complete(event->key());
                break;
#endif
#if defined(Q_WS_X11)
            case Qt::Key_E:
                end(0);
                break;

            case Qt::Key_U:
                if (!d->readOnly) {
                    setSelection(0, d->text.size());
#ifndef QT_NO_CLIPBOARD
                    copy();
#endif
                    del();
                }
            break;
#endif
            default:
                unknown = true;
            }
        } else { // ### check for *no* modifier
            switch (event->key()) {
            case Qt::Key_Backspace:
                if (!d->readOnly) {
                    backspace();
#ifndef QT_NO_COMPLETER
                    d->complete(Qt::Key_Backspace);
#endif
                }
                break;
#ifdef QT_KEYPAD_NAVIGATION
            case Qt::Key_Back:
                if (QApplication::keypadNavigationEnabled() && !event->isAutoRepeat()
                    && !isReadOnly()) {
                    if (text().length() == 0) {
                        setText(d->origText);

                        if (d->resumePassword)
                        {
                            setEchoMode(PasswordEchoOnEdit);
                            d->resumePassword = false;
                        }

                        setEditFocus(false);
                    } else if (!d->deleteAllTimer.isActive()) {
                        d->deleteAllTimer.start(750, this);
                    }
                } else {
                    unknown = true;
                }
                break;
#endif

            default:
                unknown = true;
            }
        }
    }

    if (event->key() == Qt::Key_Direction_L || event->key() == Qt::Key_Direction_R) {
        setLayoutDirection((event->key() == Qt::Key_Direction_L) ? Qt::LeftToRight : Qt::RightToLeft);
        d->updateTextLayout();
        update();
        unknown = false;
    }

    if (unknown && !d->readOnly) {
        QString t = event->text();
        if (!t.isEmpty() && t.at(0).isPrint()) {
            insert(t);
#ifndef QT_NO_COMPLETER
            d->complete(event->key());
#endif
            event->accept();
            return;
        }
    }

    if (unknown)
        event->ignore();
    else
        event->accept();
}

/*!
  This function is not intended as polymorphic usage. Just a shared code
  fragment that calls QInputContext::mouseHandler for this
  class.
*/
bool QLineEditPrivate::sendMouseEventToInputContext( QMouseEvent *e )
{
#if !defined QT_NO_IM
    Q_Q(QLineEdit);
    if ( composeMode() ) {
	int tmp_cursor = xToPos(e->pos().x());
	int mousePos = tmp_cursor - cursor;
	if ( mousePos < 0 || mousePos > textLayout.preeditAreaText().length() ) {
            mousePos = -1;
	    // don't send move events outside the preedit area
            if ( e->type() == QEvent::MouseMove )
                return true;
        }

        QInputContext *qic = q->inputContext();
        if ( qic )
            // may be causing reset() in some input methods
            qic->mouseHandler(mousePos, e);
        if (!textLayout.preeditAreaText().isEmpty())
            return true;
    }
#else
    Q_UNUSED(e);
#endif

    return false;
}

/*! \reimp
 */
void QLineEdit::inputMethodEvent(QInputMethodEvent *e)
{
    Q_D(QLineEdit);
    if (d->readOnly) {
        e->ignore();
        return;
    }


    if(echoMode() == PasswordEchoOnEdit)
    {
        setEchoMode(Normal);
        clear();
        d->resumePassword = true;
    }


#ifdef QT_KEYPAD_NAVIGATION
    // Focus in if currently in navigation focus on the widget
    // Only focus in on preedits, to allow input methods to
    // commit text as they focus out without interfering with focus
    if (QApplication::keypadNavigationEnabled() && 
            hasFocus() && !hasEditFocus()
            && !e->preeditString().isEmpty()) {
        setEditFocus(true);
        selectAll();        // so text is replaced rather than appended to
    }
#endif

    int priorState = d->undoState;
    d->removeSelectedText();

    int c = d->cursor; // cursor position after insertion of commit string
    if (e->replacementStart() <= 0)
        c += e->commitString().length() + qMin(-e->replacementStart(), e->replacementLength());

    d->cursor += e->replacementStart();

    // insert commit string
    if (e->replacementLength()) {
        d->selstart = d->cursor;
        d->selend = d->selstart + e->replacementLength();
        d->removeSelectedText();
    }
    if (!e->commitString().isEmpty())
        d->insert(e->commitString());

    d->cursor = c;

    d->textLayout.setPreeditArea(d->cursor, e->preeditString());
    d->preeditCursor = e->preeditString().length();
    d->hideCursor = false;
    QList<QTextLayout::FormatRange> formats;
    for (int i = 0; i < e->attributes().size(); ++i) {
        const QInputMethodEvent::Attribute &a = e->attributes().at(i);
        if (a.type == QInputMethodEvent::Cursor) {
            d->preeditCursor = a.start;
            d->hideCursor = !a.length;
        } else if (a.type == QInputMethodEvent::TextFormat) {
            QTextCharFormat f = qvariant_cast<QTextFormat>(a.value).toCharFormat();
            if (f.isValid()) {
                QTextLayout::FormatRange o;
                o.start = a.start + d->cursor;
                o.length = a.length;
                o.format = f;
                formats.append(o);
            }
        }
    }
    d->textLayout.setAdditionalFormats(formats);
    d->updateTextLayout();
    update();
    if (!e->commitString().isEmpty())
        d->emitCursorPositionChanged();
    d->finishChange(priorState);
#ifndef QT_NO_COMPLETER
    if (!e->commitString().isEmpty())
        d->complete(Qt::Key_unknown);
#endif
}

/*!\reimp
*/
QVariant QLineEdit::inputMethodQuery(Qt::InputMethodQuery property) const
{
    Q_D(const QLineEdit);
    switch(property) {
    case Qt::ImMicroFocus:
        return d->cursorRect();
    case Qt::ImFont:
        return font();
    case Qt::ImCursorPosition:
        return QVariant(d->cursor);
    case Qt::ImSurroundingText:
        return QVariant(d->text);
    case Qt::ImCurrentSelection:
        return QVariant(selectedText());
    default:
        return QVariant();
    }
}

/*!\reimp
*/

void QLineEdit::focusInEvent(QFocusEvent *e)
{
    Q_D(QLineEdit);
    if (e->reason() == Qt::TabFocusReason ||
         e->reason() == Qt::BacktabFocusReason  ||
         e->reason() == Qt::ShortcutFocusReason)
        if (d->maskData)
            d->moveCursor(d->nextMaskBlank(0));
        else if (!d->hasSelectedText())
            selectAll();
#ifdef QT_KEYPAD_NAVIGATION
    if (!QApplication::keypadNavigationEnabled() || (hasEditFocus() && e->reason() == Qt::PopupFocusReason))
#endif
    if (!d->cursorTimer) {
        int cft = QApplication::cursorFlashTime();
        d->cursorTimer = cft ? startTimer(cft/2) : -1;
    }
    QStyleOptionFrameV2 opt;
    initStyleOption(&opt);
    if((!hasSelectedText() && d->textLayout.preeditAreaText().isEmpty())
       || style()->styleHint(QStyle::SH_BlinkCursorWhenTextSelected, &opt, this))
        d->setCursorVisible(true);
#ifdef Q_WS_MAC
    if (d->echoMode == Password || d->echoMode == NoEcho)
        qt_mac_secure_keyboard(true);
#endif
#ifdef QT_KEYPAD_NAVIGATION
    d->origText = d->text;
#endif
#ifndef QT_NO_COMPLETER
    if (d->completer) {
        d->completer->setWidget(this);
        QObject::connect(d->completer, SIGNAL(activated(QString)),
                         this, SLOT(setText(QString)));
        QObject::connect(d->completer, SIGNAL(highlighted(QString)),
                         this, SLOT(_q_completionHighlighted(QString)));
    }
#endif
    update();
}

/*!\reimp
*/

void QLineEdit::focusOutEvent(QFocusEvent *e)
{
    Q_D(QLineEdit);


    if(d->resumePassword){
        setEchoMode(PasswordEchoOnEdit);
        d->resumePassword = false;
    }


    Qt::FocusReason reason = e->reason();
    if (reason != Qt::ActiveWindowFocusReason &&
        reason != Qt::PopupFocusReason)
        deselect();

    d->setCursorVisible(false);
    if (d->cursorTimer > 0)
        killTimer(d->cursorTimer);
    d->cursorTimer = 0;
    if (reason != Qt::PopupFocusReason
        && !(QApplication::activePopupWidget() && QApplication::activePopupWidget()->parentWidget() == this)) {
        if (!d->emitingEditingFinished) {
            if (hasAcceptableInput() || d->fixup()) {
                d->emitingEditingFinished = true;
                emit editingFinished();
                d->emitingEditingFinished = false;
            }
        }
#ifdef QT3_SUPPORT
        emit lostFocus();
#endif
    }
#ifdef Q_WS_MAC
    if (d->echoMode == Password || d->echoMode == NoEcho)
        qt_mac_secure_keyboard(false);
#endif
#ifdef QT_KEYPAD_NAVIGATION
    d->origText = QString();
#endif
#ifndef QT_NO_COMPLETER
    if (d->completer) {
        QObject::disconnect(d->completer, 0, this, 0);
    }
#endif
    update();
}

/*!\reimp
*/
void QLineEdit::paintEvent(QPaintEvent *)
{
    Q_D(QLineEdit);
    QPainter p(this);

    QRect r = rect();
    const QPalet