qlineedit.cpp

奇趣公司比较新的qt/emd版本

}

void QLineEdit::setReadOnly(bool enable)
{
    Q_D(QLineEdit);
    if (d->readOnly != enable) {
        d->readOnly = enable;
        setAttribute(Qt::WA_MacShowFocusRect, !d->readOnly);
        update();
    }
}


#ifndef QT_NO_CLIPBOARD
/*!
    Copies the selected text to the clipboard and deletes it, if there
    is any, and if echoMode() is \l Normal.

    If the current validator disallows deleting the selected text,
    cut() will copy without deleting.

    \sa copy() paste() setValidator()
*/

void QLineEdit::cut()
{
    if (hasSelectedText()) {
        copy();
        del();
    }
}


/*!
    Copies the selected text to the clipboard, if there is any, and if
    echoMode() is \l Normal.

    \sa cut() paste()
*/

void QLineEdit::copy() const
{
    Q_D(const QLineEdit);
    d->copy();
}

/*!
    Inserts the clipboard's text at the cursor position, deleting any
    selected text, providing the line edit is not \link
    QLineEdit::readOnly read-only\endlink.

    If the end result would not be acceptable to the current
    \link setValidator() validator\endlink, nothing happens.

    \sa copy() cut()
*/

void QLineEdit::paste()
{
    if(echoMode() == PasswordEchoOnEdit)
    {
        Q_D(QLineEdit);
        setEchoMode(Normal);
        clear();
        d->resumePassword = true;
    }
    insert(QApplication::clipboard()->text(QClipboard::Clipboard));
}

void QLineEditPrivate::copy(bool clipboard) const
{
    Q_Q(const QLineEdit);
    QString t = q->selectedText();
    if (!t.isEmpty() && echoMode == QLineEdit::Normal) {
        q->disconnect(QApplication::clipboard(), SIGNAL(selectionChanged()), q, 0);
        QApplication::clipboard()->setText(t, clipboard ? QClipboard::Clipboard : QClipboard::Selection);
        q->connect(QApplication::clipboard(), SIGNAL(selectionChanged()),
                   q, SLOT(_q_clipboardChanged()));
    }
}

#endif // !QT_NO_CLIPBOARD

/*! \reimp
*/
bool QLineEdit::event(QEvent * e)
{
    Q_D(QLineEdit);
    if (e->type() == QEvent::ShortcutOverride && !d->readOnly) {
        QKeyEvent* ke = (QKeyEvent*) e;
        if (ke->modifiers() == Qt::NoModifier || ke->modifiers() == Qt::ShiftModifier
            || ke->modifiers() == Qt::KeypadModifier) {
            if (ke->key() < Qt::Key_Escape) {
                ke->accept();
            } else {
                switch (ke->key()) {
                case Qt::Key_Delete:
                case Qt::Key_Home:
                case Qt::Key_End:
                case Qt::Key_Backspace:
                case Qt::Key_Left:
                case Qt::Key_Right:
                    ke->accept();
                default:
                    break;
                }
            }
        } else if (ke->modifiers() & Qt::ControlModifier) {
            switch (ke->key()) {
// Those are too frequently used for application functionality
/*            case Qt::Key_A:
            case Qt::Key_B:
            case Qt::Key_D:
            case Qt::Key_E:
            case Qt::Key_F:
            case Qt::Key_H:
            case Qt::Key_K:
*/
            case Qt::Key_C:
            case Qt::Key_V:
            case Qt::Key_X:
            case Qt::Key_Y:
            case Qt::Key_Z:
            case Qt::Key_Left:
            case Qt::Key_Right:
#if !defined(Q_WS_MAC)
            case Qt::Key_Insert:
            case Qt::Key_Delete:
#endif
                ke->accept();
            default:
                break;
            }
        }
    } else if (e->type() == QEvent::Timer) {
        // should be timerEvent, is here for binary compatibility
        int timerId = ((QTimerEvent*)e)->timerId();
        if (timerId == d->cursorTimer) {
            QStyleOptionFrameV2 opt;
            initStyleOption(&opt);
            if(!hasSelectedText()
               || style()->styleHint(QStyle::SH_BlinkCursorWhenTextSelected, &opt, this))
                d->setCursorVisible(!d->cursorVisible);
#ifndef QT_NO_DRAGANDDROP
        } else if (timerId == d->dndTimer.timerId()) {
            d->drag();
#endif
        }
        else if (timerId == d->tripleClickTimer.timerId())
            d->tripleClickTimer.stop();
#ifdef QT_KEYPAD_NAVIGATION
        else if (timerId == d->deleteAllTimer.timerId()) {
            d->deleteAllTimer.stop();
            clear();
        }
#endif
    } else if (e->type() == QEvent::ContextMenu) {
#ifndef QT_NO_IM
        if (d->composeMode())
            return true;
#endif
        d->separate();
    }
#ifdef QT_KEYPAD_NAVIGATION
    if (QApplication::keypadNavigationEnabled()) {
        if ((e->type() == QEvent::KeyPress) || (e->type() == QEvent::KeyRelease)) {
            QKeyEvent *ke = (QKeyEvent *)e;
            if (ke->key() == Qt::Key_Back) {
                if (ke->isAutoRepeat()) {
                    // Swallow it. We don't want back keys running amok.
                    ke->accept();
                    return true;
                }
                if ((e->type() == QEvent::KeyRelease)
                    && !isReadOnly()
                    && d->deleteAllTimer.isActive()) {
                    d->deleteAllTimer.stop();
                    backspace();
                    ke->accept();
                    return true;
                }
            }
        } else if (e->type() == QEvent::EnterEditFocus) {
            end(false);
            if (!d->cursorTimer) {
                int cft = QApplication::cursorFlashTime();
                d->cursorTimer = cft ? startTimer(cft/2) : -1;
            }
        } else if (e->type() == QEvent::LeaveEditFocus) {
            d->setCursorVisible(false);
            if (d->cursorTimer > 0)
                killTimer(d->cursorTimer);
            d->cursorTimer = 0;
        }
    }
#endif
    return QWidget::event(e);
}

/*! \reimp
*/
void QLineEdit::mousePressEvent(QMouseEvent* e)
{
    Q_D(QLineEdit);
    if (d->sendMouseEventToInputContext(e))
	return;
    if (e->button() == Qt::RightButton)
        return;
#ifdef QT_KEYPAD_NAVIGATION
    if (QApplication::keypadNavigationEnabled() && !hasEditFocus()) {
        setEditFocus(true);
        // Get the completion list to pop up.
        if (d->completer)
            d->completer->complete();
    }
#endif
    if (d->tripleClickTimer.isActive() && (e->pos() - d->tripleClick).manhattanLength() <
         QApplication::startDragDistance()) {
        selectAll();
        return;
    }
    bool mark = e->modifiers() & Qt::ShiftModifier;
    int cursor = d->xToPos(e->pos().x());
#ifndef QT_NO_DRAGANDDROP
    if (!mark && d->dragEnabled && d->echoMode == Normal &&
         e->button() == Qt::LeftButton && d->inSelection(e->pos().x())) {
        d->cursor = cursor;
        update();
        d->dndPos = e->pos();
        if (!d->dndTimer.isActive())
            d->dndTimer.start(QApplication::startDragTime(), this);
        d->emitCursorPositionChanged();
    } else
#endif
    {
        d->moveCursor(cursor, mark);
    }
}

/*! \reimp
*/
void QLineEdit::mouseMoveEvent(QMouseEvent * e)
{
    Q_D(QLineEdit);
    if (d->sendMouseEventToInputContext(e))
	return;

    if (e->buttons() & Qt::LeftButton) {
#ifndef QT_NO_DRAGANDDROP
        if (d->dndTimer.isActive()) {
            if ((d->dndPos - e->pos()).manhattanLength() > QApplication::startDragDistance())
                d->drag();
        } else
#endif
        {
            d->moveCursor(d->xToPos(e->pos().x()), true);
        }
    }
}

/*! \reimp
*/
void QLineEdit::mouseReleaseEvent(QMouseEvent* e)
{
    Q_D(QLineEdit);
    if (d->sendMouseEventToInputContext(e))
	return;
#ifndef QT_NO_DRAGANDDROP
    if (e->button() == Qt::LeftButton) {
        if (d->dndTimer.isActive()) {
            d->dndTimer.stop();
            deselect();
            return;
        }
    }
#endif
#ifndef QT_NO_CLIPBOARD
    if (QApplication::clipboard()->supportsSelection()) {
        if (e->button() == Qt::LeftButton) {
            d->copy(false);
        } else if (!d->readOnly && e->button() == Qt::MidButton) {
            d->deselect();
            insert(QApplication::clipboard()->text(QClipboard::Selection));
        }
    }
#endif
}

/*! \reimp
*/
void QLineEdit::mouseDoubleClickEvent(QMouseEvent* e)
{
    Q_D(QLineEdit);
    if (d->sendMouseEventToInputContext(e))
	return;
    if (e->button() == Qt::LeftButton) {
        deselect();
        d->cursor = d->xToPos(e->pos().x());
        d->cursor = d->textLayout.previousCursorPosition(d->cursor, QTextLayout::SkipWords);
        // ## text layout should support end of words.
        int end = d->textLayout.nextCursorPosition(d->cursor, QTextLayout::SkipWords);
        while (end > d->cursor && d->text[end-1].isSpace())
            --end;
        d->moveCursor(end, true);
        d->tripleClickTimer.start(QApplication::doubleClickInterval(), this);
        d->tripleClick = e->pos();
    }
}

/*!
    \fn void  QLineEdit::returnPressed()

    This signal is emitted when the Return or Enter key is pressed.
    Note that if there is a validator() or inputMask() set on the line
    edit, the returnPressed() signal will only be emitted if the input
    follows the inputMask() and the validator() returns
    QValidator::Acceptable.
*/

/*!
    \fn void  QLineEdit::editingFinished()

    This signal is emitted when the Return or Enter key is pressed or
    the line edit loses focus. Note that if there is a validator() or
    inputMask() set on the line edit and enter/return is pressed, the
    editingFinished() signal will only be emitted if the input follows
    the inputMask() and the validator() returns QValidator::Acceptable.
*/

/*!
    Converts the given key press \a event into a line edit action.

    If Return or Enter is pressed and the current text is valid (or
    can be \link QValidator::fixup() made valid\endlink by the
    validator), the signal returnPressed() is emitted.

    The default key bindings are listed in the class's detailed
    description.
*/

void QLineEdit::keyPressEvent(QKeyEvent *event)
{
    Q_D(QLineEdit);

#ifndef QT_NO_COMPLETER
    if (d->completer
        && d->completer->popup()
        && d->completer->popup()->isVisible()) {
        // The following keys are forwarded by the completer to the widget
        // Ignoring the events lets the completer provide suitable default behavior
       switch (event->key()) {
       case Qt::Key_Escape:
            event->ignore();
            return;
       case Qt::Key_Enter:
       case Qt::Key_Return:
       case Qt::Key_F4:
#ifdef QT_KEYPAD_NAVIGATION
       case Qt::Key_Select:
           if (!QApplication::keypadNavigationEnabled())
               break;
#endif
           d->completer->popup()->hide(); // just hide. will end up propagating to parent
       default:
           break; // normal key processing
       }
    }
#endif // QT_NO_COMPLETER

#ifdef QT_KEYPAD_NAVIGATION
    bool select = false;
    switch (event->key()) {
        case Qt::Key_Select:
            if (QApplication::keypadNavigationEnabled()) {
                if (hasEditFocus()) {
                    setEditFocus(false);
                    if (d->completer && d->completer->popup()->isVisible())
                        d->completer->popup()->hide();
                    select = true;
                }
            }
            break;
        case Qt::Key_Back:
        case Qt::Key_No:
            if (!QApplication::keypadNavigationEnabled() || !hasEditFocus()) {
                event->ignore();
                return;
            }
            break;
        default:
            if (QApplication::keypadNavigationEnabled()) {
                if (!hasEditFocus() && !(event->modifiers() & Qt::ControlModifier)) {
                    if (!event->text().isEmpty() && event->text().at(0).isPrint()
                        && !isReadOnly())
                    {
                        setEditFocus(true);
                        clear();
                    } else {
                        event->ignore();
                        return;
                    }
                }
            }
    }



    if (QApplication::keypadNavigationEnabled() && !select && !hasEditFocus()) {
        setEditFocus(true);
        if (event->key() == Qt::Key_Select)
            return; // Just start. No action.
    }
#endif


    if(echoMode() == PasswordEchoOnEdit &&
       !isReadOnly() &&
       !event->text().isEmpty() &&
#ifdef QT_KEYPAD_NAVIGATION
       event->key() != Qt::Key_Select &&
       event->key() != Qt::Key_Up &&
       event->key() != Qt::Key_Down &&
       event->key() != Qt::Key_Back &&
#endif
       !(event->modifiers() & Qt::ControlModifier))
    {
        setEchoMode(Normal);
        clear();
        d->resumePassword = true;
    }

    d->setCursorVisible(true);
    if (event->key() == Qt::Key_Enter || event->key() == Qt::Key_Return) {
        if (hasAcceptableInput() || d->fixup()) {
            emit returnPressed();
            d->emitingEditingFinished = true;
            emit editingFinished();
            d->emitingEditingFinished = false;
        }
        event->ignore();
        return;
    }
    bool unknown = false;

    if (false) {
    }
#ifndef QT_NO_SHORTCUT
    else if (event == QKeySequence::Undo) {
        if (!d->readOnly)
            undo();
    }
    else if (event == QKeySequence::Redo) {
        if (!d->readOnly)
            redo();
    }
    else if (event == QKeySequence::SelectAll) {
        selectAll();
    }
#ifndef QT_NO_CLIPBOARD
    else if (event == QKeySequence::Copy) {
        copy();