qlineedit.cpp

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#include "qlineedit.h"
#include "qlineedit_p.h"

#ifndef QT_NO_LINEEDIT
#include "qaction.h"
#include "qapplication.h"
#include "qclipboard.h"
#include "qdrag.h"
#include "qdrawutil.h"
#include "qevent.h"
#include "qfontmetrics.h"
#include "qmenu.h"
#include "qpainter.h"
#include "qpixmap.h"
#include "qpointer.h"
#include "qstringlist.h"
#include "qstyle.h"
#include "qstyleoption.h"
#include "qtimer.h"
#include "qvalidator.h"
#include "qvariant.h"
#include "qvector.h"
#include "qwhatsthis.h"
#include "qdebug.h"
#include "qtextedit.h"
#include <private/qtextedit_p.h>
#ifndef QT_NO_ACCESSIBILITY
#include "qaccessible.h"
#endif
#ifndef QT_NO_IM
#include "qinputcontext.h"
#include "qlist.h"
#endif
#include "qabstractitemview.h"
#include "private/qstylesheetstyle_p.h"

#ifndef QT_NO_SHORTCUT
#include "private/qapplication_p.h"
#include "private/qshortcutmap_p.h"
#include "qkeysequence.h"
#define ACCEL_KEY(k) (!qApp->d_func()->shortcutMap.hasShortcutForKeySequence(k) ? QLatin1Char('\t') + QString(QKeySequence(k)) : QString())
#else
#define ACCEL_KEY(k) QString()
#endif

#include <limits.h>

QT_BEGIN_NAMESPACE

#ifdef Q_WS_MAC
extern void qt_mac_secure_keyboard(bool); //qapplication_mac.cpp
#endif

void QLineEdit::initStyleOption(QStyleOptionFrame *option) const
{
    if (!option)
        return;

    Q_D(const QLineEdit);
    option->initFrom(this);
    option->rect = contentsRect();
    option->lineWidth = d->frame ? style()->pixelMetric(QStyle::PM_DefaultFrameWidth, option, this)
                                 : 0;
    option->midLineWidth = 0;
    option->state |= QStyle::State_Sunken;
    if (d->control->isReadOnly())
        option->state |= QStyle::State_ReadOnly;
#ifdef QT_KEYPAD_NAVIGATION
    if (hasEditFocus())
        option->state |= QStyle::State_HasEditFocus;
#endif
    if (QStyleOptionFrameV2 *optionV2 = qstyleoption_cast<QStyleOptionFrameV2 *>(option))
        optionV2->features = QStyleOptionFrameV2::None;
}

QLineEdit::QLineEdit(QWidget* parent)
    : QWidget(*new QLineEditPrivate, parent,0)
{
    Q_D(QLineEdit);
    d->init(QString());
}

QLineEdit::QLineEdit(const QString& contents, QWidget* parent)
    : QWidget(*new QLineEditPrivate, parent, 0)
{
    Q_D(QLineEdit);
    d->init(contents);
}


#ifdef QT3_SUPPORT

QLineEdit::QLineEdit(QWidget* parent, const char* name)
    : QWidget(*new QLineEditPrivate, parent,0)
{
    Q_D(QLineEdit);
    setObjectName(QString::fromAscii(name));
    d->init(QString());
}

QLineEdit::QLineEdit(const QString& contents, QWidget* parent, const char* name)
    : QWidget(*new QLineEditPrivate, parent, 0)
{
    Q_D(QLineEdit);
    setObjectName(QString::fromAscii(name));
    d->init(contents);
}

QLineEdit::QLineEdit(const QString& contents, const QString &inputMask, QWidget* parent, const char* name)
    : QWidget(*new QLineEditPrivate, parent, 0)
{
    Q_D(QLineEdit);
    setObjectName(QString::fromAscii(name));
    d->init(contents);
    d->control->setInputMask(inputMask);
    d->control->moveCursor(d->control->nextMaskBlank(contents.length()));
}
#endif

QLineEdit::~QLineEdit()
{
}


QString QLineEdit::text() const
{
    Q_D(const QLineEdit);
    return d->control->text();
}

void QLineEdit::setText(const QString& text)
{
    Q_D(QLineEdit);
    d->control->setText(text);
}

QString QLineEdit::placeholderText() const
{
    Q_D(const QLineEdit);
    return d->placeholderText;
}

void QLineEdit::setPlaceholderText(const QString& placeholderText)
{
    Q_D(QLineEdit);
    if (d->placeholderText != placeholderText) {
        d->placeholderText = placeholderText;
        if (!hasFocus())
            update();
    }
}

QString QLineEdit::displayText() const
{
    Q_D(const QLineEdit);
    return d->control->displayText();
}


int QLineEdit::maxLength() const
{
    Q_D(const QLineEdit);
    return d->control->maxLength();
}

void QLineEdit::setMaxLength(int maxLength)
{
    Q_D(QLineEdit);
    d->control->setMaxLength(maxLength);
}

bool QLineEdit::hasFrame() const
{
    Q_D(const QLineEdit);
    return d->frame;
}


void QLineEdit::setFrame(bool enable)
{
    Q_D(QLineEdit);
    d->frame = enable;
    update();
    updateGeometry();
}


QLineEdit::EchoMode QLineEdit::echoMode() const
{
    Q_D(const QLineEdit);
    return (EchoMode) d->control->echoMode();
}

void QLineEdit::setEchoMode(EchoMode mode)
{
    Q_D(QLineEdit);
    if (mode == (EchoMode)d->control->echoMode())
        return;
    Qt::InputMethodHints imHints = inputMethodHints();
    if (mode == Password || mode == NoEcho) {
        imHints |= Qt::ImhHiddenText;
    } else {
        imHints &= ~Qt::ImhHiddenText;
    }
    if (mode != Normal) {
        imHints |= (Qt::ImhNoAutoUppercase | Qt::ImhNoPredictiveText);
    } else {
        imHints &= ~(Qt::ImhNoAutoUppercase | Qt::ImhNoPredictiveText);
    }
    setInputMethodHints(imHints);
    d->control->setEchoMode(mode);
    update();
#ifdef Q_WS_MAC
    if (hasFocus())
        qt_mac_secure_keyboard(mode == Password || mode == NoEcho);
#endif
}


#ifndef QT_NO_VALIDATOR

const QValidator * QLineEdit::validator() const
{
    Q_D(const QLineEdit);
    return d->control->validator();
}

void QLineEdit::setValidator(const QValidator *v)
{
    Q_D(QLineEdit);
    d->control->setValidator(v);
}
#endif // QT_NO_VALIDATOR

#ifndef QT_NO_COMPLETER

void QLineEdit::setCompleter(QCompleter *c)
{
    Q_D(QLineEdit);
    if (c == d->control->completer())
        return;
    if (d->control->completer()) {
        disconnect(d->control->completer(), 0, this, 0);
        d->control->completer()->setWidget(0);
        if (d->control->completer()->parent() == this)
            delete d->control->completer();
    }
    d->control->setCompleter(c);
    if (!c)
        return;
    if (c->widget() == 0)
        c->setWidget(this);
    if (hasFocus()) {
        QObject::connect(d->control->completer(), SIGNAL(activated(QString)),
                         this, SLOT(setText(QString)));
        QObject::connect(d->control->completer(), SIGNAL(highlighted(QString)),
                         this, SLOT(_q_completionHighlighted(QString)));
    }
}

QCompleter *QLineEdit::completer() const
{
    Q_D(const QLineEdit);
    return d->control->completer();
}

#endif // QT_NO_COMPLETER

QSize QLineEdit::sizeHint() const
{
    Q_D(const QLineEdit);
    ensurePolished();
    QFontMetrics fm(font());
    int h = qMax(fm.height(), 14) + 2*d->verticalMargin
            + d->topTextMargin + d->bottomTextMargin
            + d->topmargin + d->bottommargin;
    int w = fm.width(QLatin1Char('x')) * 17 + 2*d->horizontalMargin
            + d->leftTextMargin + d->rightTextMargin
            + d->leftmargin + d->rightmargin; // "some"
    QStyleOptionFrameV2 opt;
    initStyleOption(&opt);
    return (style()->sizeFromContents(QStyle::CT_LineEdit, &opt, QSize(w, h).
                                      expandedTo(QApplication::globalStrut()), this));
}


QSize QLineEdit::minimumSizeHint() const
{
    Q_D(const QLineEdit);
    ensurePolished();
    QFontMetrics fm = fontMetrics();
    int h = fm.height() + qMax(2*d->verticalMargin, fm.leading())
            + d->topmargin + d->bottommargin;
    int w = fm.maxWidth() + d->leftmargin + d->rightmargin;
    QStyleOptionFrameV2 opt;
    initStyleOption(&opt);
    return (style()->sizeFromContents(QStyle::CT_LineEdit, &opt, QSize(w, h).
                                      expandedTo(QApplication::globalStrut()), this));
}


int QLineEdit::cursorPosition() const
{
    Q_D(const QLineEdit);
    return d->control->cursorPosition();
}

void QLineEdit::setCursorPosition(int pos)
{
    Q_D(QLineEdit);
    d->control->setCursorPosition(pos);
}

// ### What should this do if the point is outside of contentsRect? Currently returns 0.
int QLineEdit::cursorPositionAt(const QPoint &pos)
{
    Q_D(QLineEdit);
    return d->xToPos(pos.x());
}


#ifdef QT3_SUPPORT

bool QLineEdit::validateAndSet(const QString &newText, int newPos,
                                 int newMarkAnchor, int newMarkDrag)
{
    // The suggested functions above in the docs don't seem to validate,
    // below code tries to mimic previous behaviour.
    QString oldText = text();
    setText(newText);
    if(!hasAcceptableInput()){
        setText(oldText);
        return false;
    }
    int selstart = qMin(newMarkAnchor, newMarkDrag);
    int sellength = qAbs(newMarkAnchor - newMarkDrag);
    if (selstart == newPos) {
        selstart = qMax(newMarkAnchor, newMarkDrag);
        sellength = -sellength;
    }
    //setSelection also set the position
    setSelection(selstart, sellength);
    return true;
}
#endif //QT3_SUPPORT

Qt::Alignment QLineEdit::alignment() const
{
    Q_D(const QLineEdit);
    return QFlag(d->alignment);
}

void QLineEdit::setAlignment(Qt::Alignment alignment)
{
    Q_D(QLineEdit);
    d->alignment = alignment;
    update();
}


void QLineEdit::cursorForward(bool mark, int steps)
{
    Q_D(QLineEdit);
    d->control->cursorForward(mark, steps);
}


void QLineEdit::cursorBackward(bool mark, int steps)
{
    cursorForward(mark, -steps);
}

void QLineEdit::cursorWordForward(bool mark)
{
    Q_D(QLineEdit);
    d->control->cursorWordForward(mark);
}

void QLineEdit::cursorWordBackward(bool mark)
{
    Q_D(QLineEdit);
    d->control->cursorWordBackward(mark);
}


void QLineEdit::backspace()
{
    Q_D(QLineEdit);
    d->control->backspace();
}

void QLineEdit::del()
{
    Q_D(QLineEdit);
    d->control->del();
}

void QLineEdit::home(bool mark)
{
    Q_D(QLineEdit);
    d->control->home(mark);
}

void QLineEdit::end(bool mark)
{
    Q_D(QLineEdit);
    d->control->end(mark);
}


bool QLineEdit::isModified() const
{
    Q_D(const QLineEdit);
    return d->control->isModified();
}

void QLineEdit::setModified(bool modified)
{
    Q_D(QLineEdit);
    d->control->setModified(modified);
}


bool QLineEdit::hasSelectedText() const
{
    Q_D(const QLineEdit);
    return d->control->hasSelectedText();
}

QString QLineEdit::selectedText() const
{
    Q_D(const QLineEdit);
    return d->control->selectedText();
}

int QLineEdit::selectionStart() const
{
    Q_D(const QLineEdit);
    return d->control->selectionStart();
}


#ifdef QT3_SUPPORT

bool QLineEdit::edited() const { return isModified(); }
void QLineEdit::setEdited(bool on) { setModified(on); }

int QLineEdit::characterAt(int xpos, QChar *chr) const
{
    Q_D(const QLineEdit);
    int pos = d->xToPos(xpos + contentsRect().x() - d->hscroll + d->horizontalMargin);
    QString txt = d->control->text();
    if (chr && pos < (int) txt.length())
        *chr = txt.at(pos);
    return pos;

}

bool QLineEdit::getSelection(int *start, int *end)
{
    Q_D(QLineEdit);
    if (d->control->hasSelectedText() && start && end) {
        *start = selectionStart();
        *end = *start + selectedText().length();
        return true;
    }
    return false;
}
#endif


void QLineEdit::setSelection(int start, int length)
{
    Q_D(QLineEdit);
    if (start < 0 || start > (int)d->control->text().length()) {
        qWarning("QLineEdit::setSelection: Invalid start position (%d)", start);
        return;
    }

    d->control->setSelection(start, length);

    if (d->control->hasSelectedText()){
        QStyleOptionFrameV2 opt;
        initStyleOption(&opt);
        if (!style()->styleHint(QStyle::SH_BlinkCursorWhenTextSelected, &opt, this))
            d->setCursorVisible(false);
    }
}


bool QLineEdit::isUndoAvailable() const
{
    Q_D(const QLineEdit);
    return d->control->isUndoAvailable();
}

bool QLineEdit::isRedoAvailable() const
{
    Q_D(const QLineEdit);
    return d->control->isRedoAvailable();
}

bool QLineEdit::dragEnabled() const
{
    Q_D(const QLineEdit);
    return d->dragEnabled;
}

void QLineEdit::setDragEnabled(bool b)
{
    Q_D(QLineEdit);
    d->dragEnabled = b;
}


Qt::CursorMoveStyle QLineEdit::cursorMoveStyle() const
{
    Q_D(const QLineEdit);
    return d->control->cursorMoveStyle();
}

void QLineEdit::setCursorMoveStyle(Qt::CursorMoveStyle style)
{
    Q_D(QLineEdit);
    d->control->setCursorMoveStyle(style);
}

bool QLineEdit::hasAcceptableInput() const
{
    Q_D(const QLineEdit);
    return d->control->hasAcceptableInput();
}

void QLineEdit::setTextMargins(int left, int top, int right, int bottom)
{
    Q_D(QLineEdit);
    d->leftTextMargin = left;
    d->topTextMargin = top;
    d->rightTextMargin = right;
    d->bottomTextMargin = bottom;
    updateGeometry();
    update();
}

void QLineEdit::setTextMargins(const QMargins &margins)
{
    setTextMargins(margins.left(), margins.top(), margins.right(), margins.bottom());
}

void QLineEdit::getTextMargins(int *left, int *top, int *right, int *bottom) const
{
    Q_D(const QLineEdit);
    if (left)
        *left = d->leftTextMargin;
    if (top)
        *top = d->topTextMargin;
    if (right)
        *right = d->rightTextMargin;
    if (bottom)
        *bottom = d->bottomTextMargin;
}

QMargins QLineEdit::textMargins() const
{
    Q_D(const QLineEdit);
    return QMargins(d->leftTextMargin, d->topTextMargin, d->rightTextMargin, d->bottomTextMargin);
}

QString QLineEdit::inputMask() const
{
    Q_D(const QLineEdit);
    return d->control->inputMask();
}

void QLineEdit::setInputMask(const QString &inputMask)
{
    Q_D(QLineEdit);
    d->control->setInputMask(inputMask);
}

void QLineEdit::selectAll()
{
    Q_D(QLineEdit);
    d->control->selectAll();
}

void QLineEdit::deselect()
{
    Q_D(QLineEdit);
    d->control->deselect();
}


void QLineEdit::insert(const QString &newText)
{
//     q->resetInputContext(); //#### FIX ME IN QT
    Q_D(QLineEdit);
    d->control->insert(newText);
}

void QLineEdit::clear()
{
    Q_D(QLineEdit);
    resetInputContext();
    d->control->clear();
}

void QLineEdit::undo()
{
    Q_D(QLineEdit);
    resetInputContext();
    d->control->undo();
}

void QLineEdit::redo()
{
    Q_D(QLineEdit);
    resetInputContext();
    d->control->redo();
}


bool QLineEdit::isReadOnly() const
{
    Q_D(const QLineEdit);
    return d->control->isReadOnly();
}

void QLineEdit::setReadOnly(bool enable)
{
    Q_D(QLineEdit);
    if (d->control->isReadOnly() != enable) {
        d->control->setReadOnly(enable);
        setAttribute(Qt::WA_MacShowFocusRect, !enable);
        setAttribute(Qt::WA_InputMethodEnabled, d->shouldEnableInputMethod());
#ifndef QT_NO_CURSOR
        setCursor(enable ? Qt::ArrowCursor : Qt::IBeamCursor);
#endif
        update();
    }
}


#ifndef QT_NO_CLIPBOARD

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


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

void QLineEdit::paste()
{
    Q_D(QLineEdit);
    d->control->paste();
}

#endif // !QT_NO_CLIPBOARD

bool QLineEdit::event(QEvent * e)
{
    Q_D(QLineEdit);
    if (e->type() == QEvent::Timer) {
        // should be timerEvent, is here for binary compatibility
        int timerId = ((QTimerEvent*)e)->timerId();
        if (false) {
#ifndef QT_NO_DRAGANDDROP
        } else if (timerId == d->dndTimer.timerId()) {
            d->drag();
#endif
        }
        else if (timerId == d->tripleClickTimer.timerId())
            d->tripleClickTimer.stop();
    } else if (e->type() == QEvent::ContextMenu) {
#ifndef QT_NO_IM
        if (d->control->composeMode())
            return true;
#endif
        //d->separate();
    } else if (e->type() == QEvent::WindowActivate) {
        QTimer::singleShot(0, this, SLOT(_q_handleWindowActivate()));
    }else if(e->type() == QEvent::ShortcutOverride){
        d->control->processEvent(e);
    } else if (e->type() == QEvent::KeyRelease) {
        d->control->setCursorBlinkPeriod(QApplication::cursorFlashTime());
    } else if (e->type() == QEvent::Show) {
        //In order to get the cursor blinking if QComboBox::setEditable is called when the combobox has focus
        if (hasFocus()) {
            d->control->setCursorBlinkPeriod(QApplication::cursorFlashTime());
            QStyleOptionFrameV2 opt;
            initStyleOption(&opt);
            if ((!hasSelectedText() && d->control->preeditAreaText().isEmpty())
                || style()->styleHint(QStyle::SH_BlinkCursorWhenTextSelected, &opt, this))
                d->setCursorVisible(true);
        }
    }

#ifdef QT_KEYPAD_NAVIGATION
    if (QApplication::keypadNavigationEnabled()) {
        if (e->type() == QEvent::EnterEditFocus) {
            end(false);
            d->setCursorVisible(true);
            d->control->setCursorBlinkPeriod(QApplication::cursorFlashTime());
        } else if (e->type() == QEvent::LeaveEditFocus) {
            d->setCursorVisible(false);
            d->control->setCursorBlinkPeriod(0);
            if (d->control->hasAcceptableInput() || d->control->fixup())
                emit editingFinished();
        }
    }
#endif
    return QWidget::event(e);
}

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->control->completer())
            d->control->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->control->echoMode() == Normal &&
         e->button() == Qt::LeftButton && d->control->inSelection(e->pos().x())) {
        d->dndPos = e->pos();
        if (!d->dndTimer.isActive())
            d->dndTimer.start(QApplication::startDragTime(), this);
    } else
#endif
    {
        d->control->moveCursor(cursor, mark);
    }
}

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->control->moveCursor(d->xToPos(e->pos().x()), true);
        }
    }
}

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->control->copy(QClipboard::Selection);
        } else if (!d->control->isReadOnly() && e->button() == Qt::MidButton) {
            deselect();
            insert(QApplication::clipboard()->text(QClipboard::Selection));
        }
    }
#endif

    if (!isReadOnly() && rect().contains(e->pos()))
        d->handleSoftwareInputPanel(e->button(), d->clickCausedFocus);
    d->clickCausedFocus = 0;
}

void QLineEdit::mouseDoubleClickEvent(QMouseEvent* e)
{
    Q_D(QLineEdit);
    if (d->sendMouseEventToInputContext(e))
        return;
    if (e->button() == Qt::LeftButton) {
        d->control->selectWordAtPos(d->xToPos(e->pos().x()));
        d->tripleClickTimer.start(QApplication::doubleClickInterval(), this);
        d->tripleClick = e->pos();
    }
}

void QLineEdit::keyPressEvent(QKeyEvent *event)
{
    Q_D(QLineEdit);
    #ifdef QT_KEYPAD_NAVIGATION
    bool select = false;
    switch (event->key()) {
        case Qt::Key_Select:
            if (QApplication::keypadNavigationEnabled()) {
                if (hasEditFocus()) {
                    setEditFocus(false);
                    if (d->control->completer() && d->control->completer()->popup()->isVisible())
                        d->control->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);
                    else {
                        event->ignore();
                        return;
                    }
                }
            }
    }



    if (QApplication::keypadNavigationEnabled() && !select && !hasEditFocus()) {
        setEditFocus(true);
        if (event->key() == Qt::Key_Select)
            return; // Just start. No action.
    }
#endif
    d->control->processKeyEvent(event);
    if (event->isAccepted()) {
        if (layoutDirection() != d->control->layoutDirection())
            setLayoutDirection(d->control->layoutDirection());
        d->control->setCursorBlinkPeriod(0);
    }
}

QRect QLineEdit::cursorRect() const
{
    Q_D(const QLineEdit);
    return d->cursorRect();
}

void QLineEdit::inputMethodEvent(QInputMethodEvent *e)
{
    Q_D(QLineEdit);
    if (d->control->isReadOnly()) {
        e->ignore();
        return;
    }

    if (echoMode() == PasswordEchoOnEdit && !d->control->passwordEchoEditing()) {
        // Clear the edit and reset to normal echo mode while entering input
        // method data; the echo mode switches back when the edit loses focus.
        // ### changes a public property, resets current content.
        d->updatePasswordEchoEditing(true);
        clear();
    }

#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);
#endif

    d->control->processInputMethodEvent(e);

#ifndef QT_NO_COMPLETER
    if (!e->commitString().isEmpty())
        d->control->complete(Qt::Key_unknown);
#endif
}

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->control->cursor());
    case Qt::ImSurroundingText:
        return QVariant(text());
    case Qt::ImCurrentSelection:
        return QVariant(selectedText());
    case Qt::ImMaximumTextLength:
        return QVariant(maxLength());
    case Qt::ImAnchorPosition:
        if (d->control->selectionStart() == d->control->selectionEnd())
            return QVariant(d->control->cursor());
        else if (d->control->selectionStart() == d->control->cursor())
            return QVariant(d->control->selectionEnd());
        else
            return QVariant(d->control->selectionStart());
    default:
        return QVariant();
    }
}

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

void QLineEdit::focusOutEvent(QFocusEvent *e)
{
    Q_D(QLineEdit);
    if (d->control->passwordEchoEditing()) {
        // Reset the echomode back to PasswordEchoOnEdit when the widget loses
        // focus.
        d->updatePasswordEchoEditing(false);
    }

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

    d->setCursorVisible(false);
    d->control->setCursorBlinkPeriod(0);
#ifdef QT_KEYPAD_NAVIGATION
    // editingFinished() is already emitted on LeaveEditFocus
    if (!QApplication::keypadNavigationEnabled())
#endif
    if (reason != Qt::PopupFocusReason
        || !(QApplication::activePopupWidget() && QApplication::activePopupWidget()->parentWidget() == this)) {
            if (hasAcceptableInput() || d->control->fixup())
                emit editingFinished();
#ifdef QT3_SUPPORT
        emit lostFocus();
#endif
    }
#ifdef Q_WS_MAC
    if (d->control->echoMode() == Password || d->control->echoMode() == NoEcho)
        qt_mac_secure_keyboard(false);
#endif
#ifdef QT_KEYPAD_NAVIGATION
    d->control->setCancelText(QString());
#endif
#ifndef QT_NO_COMPLETER
    if (d->control->completer()) {
        QObject::disconnect(d->control->completer(), 0, this, 0);
    }
#endif
    update();
}

void QLineEdit::paintEvent(QPaintEvent *)
{
    Q_D(QLineEdit);
    QPainter p(this);

    QRect r = rect();
    QPalette pal = palette();

    QStyleOptionFrameV2 panel;
    initStyleOption(&panel);
    style()->drawPrimitive(QStyle::PE_PanelLineEdit, &panel, &p, this);
    r = style()->subElementRect(QStyle::SE_LineEditContents, &panel, this);
    r.setX(r.x() + d->leftTextMargin);
    r.setY(r.y() + d->topTextMargin);
    r.setRight(r.right() - d->rightTextMargin);
    r.setBottom(r.bottom() - d->bottomTextMargin);
    p.setClipRect(r);

    QFontMetrics fm = fontMetrics();
    Qt::Alignment va = QStyle::visualAlignment(d->control->layoutDirection(), QFlag(d->alignment));
    switch (va & Qt::AlignVertical_Mask) {
     case Qt::AlignBottom:
         d->vscroll = r.y() + r.height() - fm.height() - d->verticalMargin;
         break;
     case Qt::AlignTop:
         d->vscroll = r.y() + d->verticalMargin;
         break;
     default:
         //center
         d->vscroll = r.y() + (r.height() - fm.height() + 1) / 2;
         break;
    }
    QRect lineRect(r.x() + d->horizontalMargin, d->vscroll, r.width() - 2*d->horizontalMargin, fm.height());

    int minLB = qMax(0, -fm.minLeftBearing());
    int minRB = qMax(0, -fm.minRightBearing());

    if (d->control->text().isEmpty()) {
        if (!hasFocus() && !d->placeholderText.isEmpty()) {
            QColor col = pal.text().color();
            col.setAlpha(128);
            QPen oldpen = p.pen();
            p.setPen(col);
            lineRect.adjust(minLB, 0, 0, 0);
            QString elidedText = fm.elidedText(d->placeholderText, Qt::ElideRight, lineRect.width());
            p.drawText(lineRect, va, elidedText);
            p.setPen(oldpen);
            return;
        }
    }

    int cix = qRound(d->control->cursorToX());

    // horizontal scrolling. d->hscroll is the left indent from the beginning
    // of the text line to the left edge of lineRect. we update this value
    // depending on the delta from the last paint event; in effect this means
    // the below code handles all scrolling based on the textline (widthUsed,
    // minLB, minRB), the line edit rect (lineRect) and the cursor position
    // (cix).
    int widthUsed = qRound(d->control->naturalTextWidth()) + 1 + minRB;
    if ((minLB + widthUsed) <=  lineRect.width()) {
        // text fits in lineRect; use hscroll for alignment
        switch (va & ~(Qt::AlignAbsolute|Qt::AlignVertical_Mask)) {
        case Qt::AlignRight:
            d->hscroll = widthUsed - lineRect.width() + 1;
            break;
        case Qt::AlignHCenter:
            d->hscroll = (widthUsed - lineRect.width()) / 2;
            break;
        default:
            // Left
            d->hscroll = 0;
            break;
        }
        d->hscroll -= minLB;
    } else if (cix - d->hscroll >= lineRect.width()) {
        // text doesn't fit, cursor is to the right of lineRect (scroll right)
        d->hscroll = cix - lineRect.width() + 1;
    } else if (cix - d->hscroll < 0 && d->hscroll < widthUsed) {
        // text doesn't fit, cursor is to the left of lineRect (scroll left)
        d->hscroll = cix;
    } else if (widthUsed - d->hscroll < lineRect.width()) {
        // text doesn't fit, text document is to the left of lineRect; align
        // right
        d->hscroll = widthUsed - lineRect.width() + 1;
    } else {
        //in case the text is bigger than the lineedit, the hscroll can never be negative
        d->hscroll = qMax(0, d->hscroll);
    }

    // the y offset is there to keep the baseline constant in case we have script changes in the text.
    QPoint topLeft = lineRect.topLeft() - QPoint(d->hscroll, d->control->ascent() - fm.ascent());

    // draw text, selections and cursors
#ifndef QT_NO_STYLE_STYLESHEET
    if (QStyleSheetStyle* cssStyle = qobject_cast<QStyleSheetStyle*>(style())) {
        cssStyle->styleSheetPalette(this, &panel, &pal);
    }
#endif
    p.setPen(pal.text().color());

    int flags = QLineControl::DrawText;

#ifdef QT_KEYPAD_NAVIGATION
    if (!QApplication::keypadNavigationEnabled() || hasEditFocus())
#endif
    if (d->control->hasSelectedText() || (d->cursorVisible && !d->control->inputMask().isEmpty() && !d->control->isReadOnly())){
        flags |= QLineControl::DrawSelections;
        // Palette only used for selections/mask and may not be in sync
        if (d->control->palette() != pal
           || d->control->palette().currentColorGroup() != pal.currentColorGroup())
            d->control->setPalette(pal);
    }

    // Asian users see an IM selection text as cursor on candidate
    // selection phase of input method, so the ordinary cursor should be
    // invisible if we have a preedit string.
    if (d->cursorVisible && !d->control->isReadOnly())
        flags |= QLineControl::DrawCursor;

    d->control->setCursorWidth(style()->pixelMetric(QStyle::PM_TextCursorWidth));
    d->control->draw(&p, topLeft, r, flags);

}


#ifndef QT_NO_DRAGANDDROP

void QLineEdit::dragMoveEvent(QDragMoveEvent *e)
{
    Q_D(QLineEdit);
    if (!d->control->isReadOnly() && e->mimeData()->hasFormat(QLatin1String("text/plain"))) {
        e->acceptProposedAction();
        d->control->moveCursor(d->xToPos(e->pos().x()), false);
        d->cursorVisible = true;
        update();
    }
}

void QLineEdit::dragEnterEvent(QDragEnterEvent * e)
{
    QLineEdit::dragMoveEvent(e);
}

void QLineEdit::dragLeaveEvent(QDragLeaveEvent *)
{
    Q_D(QLineEdit);
    if (d->cursorVisible) {
        d->cursorVisible = false;
        update();
    }
}

void QLineEdit::dropEvent(QDropEvent* e)
{
    Q_D(QLineEdit);
    QString str = e->mimeData()->text();

    if (!str.isNull() && !d->control->isReadOnly()) {
        if (e->source() == this && e->dropAction() == Qt::CopyAction)
            deselect();
        int cursorPos = d->xToPos(e->pos().x());
        int selStart = cursorPos;
        int oldSelStart = d->control->selectionStart();
        int oldSelEnd = d->control->selectionEnd();
        d->control->moveCursor(cursorPos, false);
        d->cursorVisible = false;
        e->acceptProposedAction();
        insert(str);
        if (e->source() == this) {
            if (e->dropAction() == Qt::MoveAction) {
                if (selStart > oldSelStart && selStart <= oldSelEnd)
                    setSelection(oldSelStart, str.length());
                else if (selStart > oldSelEnd)
                    setSelection(selStart - str.length(), str.length());
                else
                    setSelection(selStart, str.length());
            } else {
                setSelection(selStart, str.length());
            }
        }
    } else {
        e->ignore();
        update();
    }
}

#endif // QT_NO_DRAGANDDROP

#ifndef QT_NO_CONTEXTMENU

void QLineEdit::contextMenuEvent(QContextMenuEvent *event)
{
    if (QMenu *menu = createStandardContextMenu()) {
        menu->setAttribute(Qt::WA_DeleteOnClose);
        menu->popup(event->globalPos());
    }
}

#if defined(Q_WS_WIN) || defined(Q_WS_X11)
    extern bool qt_use_rtl_extensions;
#endif

QMenu *QLineEdit::createStandardContextMenu()
{
    Q_D(QLineEdit);
    QMenu *popup = new QMenu(this);
    popup->setObjectName(QLatin1String("qt_edit_menu"));
    QAction *action = 0;

    if (!isReadOnly()) {
        action = popup->addAction(QLineEdit::tr("&Undo") + ACCEL_KEY(QKeySequence::Undo));
        action->setEnabled(d->control->isUndoAvailable());
        connect(action, SIGNAL(triggered()), SLOT(undo()));

        action = popup->addAction(QLineEdit::tr("&Redo") + ACCEL_KEY(QKeySequence::Redo));
        action->setEnabled(d->control->isRedoAvailable());
        connect(action, SIGNAL(triggered()), SLOT(redo()));

        popup->addSeparator();
    }

#ifndef QT_NO_CLIPBOARD
    if (!isReadOnly()) {
        action = popup->addAction(QLineEdit::tr("Cu&t") + ACCEL_KEY(QKeySequence::Cut));
        action->setEnabled(!d->control->isReadOnly() && d->control->hasSelectedText()
                && d->control->echoMode() == QLineEdit::Normal);
        connect(action, SIGNAL(triggered()), SLOT(cut()));
    }

    action = popup->addAction(QLineEdit::tr("&Copy") + ACCEL_KEY(QKeySequence::Copy));
    action->setEnabled(d->control->hasSelectedText()
            && d->control->echoMode() == QLineEdit::Normal);
    connect(action, SIGNAL(triggered()), SLOT(copy()));

    if (!isReadOnly()) {
        action = popup->addAction(QLineEdit::tr("&Paste") + ACCEL_KEY(QKeySequence::Paste));
        action->setEnabled(!d->control->isReadOnly() && !QApplication::clipboard()->text().isEmpty());
        connect(action, SIGNAL(triggered()), SLOT(paste()));
    }
#endif

    if (!isReadOnly()) {
        action = popup->addAction(QLineEdit::tr("Delete"));
        action->setEnabled(!d->control->isReadOnly() && !d->control->text().isEmpty() && d->control->hasSelectedText());
        connect(action, SIGNAL(triggered()), d->control, SLOT(_q_deleteSelected()));
    }

    if (!popup->isEmpty())
        popup->addSeparator();

    action = popup->addAction(QLineEdit::tr("Select All") + ACCEL_KEY(QKeySequence::SelectAll));
    action->setEnabled(!d->control->text().isEmpty() && !d->control->allSelected());
    d->selectAllAction = action;
    connect(action, SIGNAL(triggered()), SLOT(selectAll()));

#if !defined(QT_NO_IM)
    QInputContext *qic = inputContext();
    if (qic) {
        QList<QAction *> imActions = qic->actions();
        for (int i = 0; i < imActions.size(); ++i)
            popup->addAction(imActions.at(i));
    }
#endif

#if defined(Q_WS_WIN) || defined(Q_WS_X11)
    if (!d->control->isReadOnly() && qt_use_rtl_extensions) {
#else
    if (!d->control->isReadOnly()) {
#endif
        popup->addSeparator();
        QUnicodeControlCharacterMenu *ctrlCharacterMenu = new QUnicodeControlCharacterMenu(this, popup);
        popup->addMenu(ctrlCharacterMenu);
    }
    return popup;
}
#endif // QT_NO_CONTEXTMENU

void QLineEdit::changeEvent(QEvent *ev)
{
    Q_D(QLineEdit);
    switch(ev->type())
    {
    case QEvent::ActivationChange:
        if (!palette().isEqual(QPalette::Active, QPalette::Inactive))
            update();
        break;
    case QEvent::FontChange:
        d->control->setFont(font());
        break;
    case QEvent::StyleChange:
        {
            QStyleOptionFrameV2 opt;
            initStyleOption(&opt);
            d->control->setPasswordCharacter(style()->styleHint(QStyle::SH_LineEdit_PasswordCharacter, &opt, this));
        }
        update();
        break;
    default:
        break;
    }
    QWidget::changeEvent(ev);
}

QT_END_NAMESPACE

#include "moc_qlineedit.cpp"

#endif // QT_NO_LINEEDIT