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diff --git a/src/gui/widgets/qcheckbox.cpp b/src/gui/widgets/qcheckbox.cpp
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--- a/src/gui/widgets/qcheckbox.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
-** All rights reserved.
-** Contact: Nokia Corporation (qt-info@nokia.com)
-**
-** This file is part of the QtGui module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** No Commercial Usage
-** This file contains pre-release code and may not be distributed.
-** You may use this file in accordance with the terms and conditions
-** contained in the Technology Preview License Agreement accompanying
-** this package.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 2.1 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL included in the
-** packaging of this file.  Please review the following information to
-** ensure the GNU Lesser General Public License version 2.1 requirements
-** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** In addition, as a special exception, Nokia gives you certain additional
-** rights.  These rights are described in the Nokia Qt LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-** If you have questions regarding the use of this file, please contact
-** Nokia at qt-info@nokia.com.
-**
-**
-**
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "qcheckbox.h"
-#include "qapplication.h"
-#include "qbitmap.h"
-#include "qicon.h"
-#include "qstylepainter.h"
-#include "qstyle.h"
-#include "qstyleoption.h"
-#include "qevent.h"
-
-#include "private/qabstractbutton_p.h"
-
-QT_BEGIN_NAMESPACE
-
-class QCheckBoxPrivate : public QAbstractButtonPrivate
-{
-    Q_DECLARE_PUBLIC(QCheckBox)
-public:
-    QCheckBoxPrivate()
-        : QAbstractButtonPrivate(QSizePolicy::CheckBox), tristate(false), noChange(false),
-          hovering(true), publishedState(Qt::Unchecked) {}
-
-    uint tristate : 1;
-    uint noChange : 1;
-    uint hovering : 1;
-    uint publishedState : 2;
-
-    void init();
-};
-
-/*!
-    \class QCheckBox
-    \brief The QCheckBox widget provides a checkbox with a text label.
-
-    \ingroup basicwidgets
-
-
-    A QCheckBox is an option button that can be switched on (checked) or off
-    (unchecked). Checkboxes are typically used to represent features in an
-    application that can be enabled or disabled without affecting others, but
-    different types of behavior can be implemented. For example, a
-    QButtonGroup can be used to group check buttons logically, allowing
-    exclusive checkboxes. However, QButtonGroup does not provide any visual
-    representation.
-
-    The image below further illustrates the differences between exclusive and
-    non-exclusive checkboxes.
-
-    \table
-    \row \o \inlineimage checkboxes-exclusive.png
-         \o \inlineimage checkboxes-non-exclusive.png
-    \endtable
-
-    Whenever a checkbox is checked or cleared it emits the signal
-    stateChanged(). Connect to this signal if you want to trigger an action
-    each time the checkbox changes state. You can use isChecked() to query
-    whether or not a checkbox is checked.
-
-    In addition to the usual checked and unchecked states, QCheckBox optionally
-    provides a third state to indicate "no change". This is useful whenever you
-    need to give the user the option of neither checking nor unchecking a
-    checkbox. If you need this third state, enable it with setTristate(), and
-    use checkState() to query the current toggle state.
-
-    Just like QPushButton, a checkbox displays text, and optionally a small
-    icon. The icon is set with setIcon(). The text can be set in the
-    constructor or with setText(). A shortcut key can be specified by preceding
-    the preferred character with an ampersand. For example:
-
-    \snippet doc/src/snippets/code/src_gui_widgets_qcheckbox.cpp 0
-
-    In this example the shortcut is \e{Alt+A}. See the \l{QShortcut#mnemonic}
-    {QShortcut} documentation for details (to display an actual ampersand,
-    use '&&').
-
-    Important inherited functions: text(), setText(), text(), pixmap(),
-    setPixmap(), accel(), setAccel(), isToggleButton(), setDown(), isDown(),
-    isOn(), checkState(), autoRepeat(), isExclusiveToggle(), group(),
-    setAutoRepeat(), toggle(), pressed(), released(), clicked(), toggled(),
-    checkState(), and stateChanged().
-
-    \table 100%
-    \row
-        \o \inlineimage macintosh-checkbox.png Screenshot of a Macintosh style checkbox
-        \o A checkbox shown in the \l{Macintosh Style Widget Gallery}{Macintosh widget style}.
-    \row
-        \o \inlineimage windows-checkbox.png Screenshot of a Windows XP style checkbox
-        \o A checkbox shown in the \l{Windows XP Style Widget Gallery}{Windows XP widget style}.
-    \row
-        \o \inlineimage plastique-checkbox.png Screenshot of a Plastique style checkbox
-        \o A checkbox shown in the \l{Plastique Style Widget Gallery}{Plastique widget style}.
-    \endtable
-
-    \sa QAbstractButton, QRadioButton, {fowler}{GUI Design Handbook: Check Box}
-*/
-
-/*!
-    \enum QCheckBox::ToggleState
-    \compat
-
-    \value Off  Use Qt::Unchecked instead.
-    \value NoChange  Use Qt::PartiallyChecked instead.
-    \value On  Use Qt::Checked instead.
-*/
-
-/*!
-    \fn void QCheckBox::stateChanged(int state)
-
-    This signal is emitted whenever the check box's state changes, i.e.
-    whenever the user checks or unchecks it.
-
-    \a state contains the check box's new Qt::CheckState.
-*/
-
-/*!
-    \property QCheckBox::tristate
-    \brief whether the checkbox is a tri-state checkbox
-
-    The default is false; i.e. the checkbox has only two states.
-*/
-
-void QCheckBoxPrivate::init()
-{
-    Q_Q(QCheckBox);
-    q->setCheckable(true);
-    q->setMouseTracking(true);
-    q->setForegroundRole(QPalette::WindowText);
-    setLayoutItemMargins(QStyle::SE_CheckBoxLayoutItem);
-}
-
-/*!
-    Initializes \a option with the values from this QCheckBox. This method is
-    useful for subclasses that require a QStyleOptionButton, but do not want
-    to fill in all the information themselves.
-
-    \sa QStyleOption::initFrom()
-*/
-void QCheckBox::initStyleOption(QStyleOptionButton *option) const
-{
-    if (!option)
-        return;
-    Q_D(const QCheckBox);
-    option->initFrom(this);
-    if (d->down)
-        option->state |= QStyle::State_Sunken;
-    if (d->tristate && d->noChange)
-        option->state |= QStyle::State_NoChange;
-    else
-        option->state |= d->checked ? QStyle::State_On : QStyle::State_Off;
-    if (testAttribute(Qt::WA_Hover) && underMouse()) {
-        if (d->hovering)
-            option->state |= QStyle::State_MouseOver;
-        else
-            option->state &= ~QStyle::State_MouseOver;
-    }
-    option->text = d->text;
-    option->icon = d->icon;
-    option->iconSize = iconSize();
-}
-
-/*!
-    Constructs a checkbox with the given \a parent, but with no text.
-
-    \a parent is passed on to the QAbstractButton constructor.
-*/
-
-QCheckBox::QCheckBox(QWidget *parent)
-    : QAbstractButton (*new QCheckBoxPrivate, parent)
-{
-    Q_D(QCheckBox);
-    d->init();
-}
-
-/*!
-    Constructs a checkbox with the given \a parent and \a text.
-
-    \a parent is passed on to the QAbstractButton constructor.
-*/
-
-QCheckBox::QCheckBox(const QString &text, QWidget *parent)
-    : QAbstractButton (*new QCheckBoxPrivate, parent)
-{
-    Q_D(QCheckBox);
-    d->init();
-    setText(text);
-}
-
-void QCheckBox::setTristate(bool y)
-{
-    Q_D(QCheckBox);
-    d->tristate = y;
-}
-
-bool QCheckBox::isTristate() const
-{
-    Q_D(const QCheckBox);
-    return d->tristate;
-}
-
-
-/*!
-    Returns the check box's check state. If you do not need tristate support,
-    you can also  use \l QAbstractButton::isChecked() which returns a boolean.
-
-    \sa setCheckState() Qt::CheckState
-*/
-Qt::CheckState QCheckBox::checkState() const
-{
-    Q_D(const QCheckBox);
-    if (d->tristate &&  d->noChange)
-        return Qt::PartiallyChecked;
-    return d->checked ? Qt::Checked : Qt::Unchecked;
-}
-
-/*!
-    Sets the check box's check state to \a state. If you do not need tristate
-    support, you can also use \l QAbstractButton::setChecked() which takes a
-    boolean.
-
-    \sa checkState() Qt::CheckState
-*/
-void QCheckBox::setCheckState(Qt::CheckState state)
-{
-    Q_D(QCheckBox);
-    if (state == Qt::PartiallyChecked) {
-        d->tristate = true;
-        d->noChange = true;
-    } else {
-        d->noChange = false;
-    }
-    d->blockRefresh = true;
-    setChecked(state != Qt::Unchecked);
-    d->blockRefresh = false;
-    d->refresh();
-    if ((uint)state != d->publishedState) {
-        d->publishedState = state;
-        emit stateChanged(state);
-    }
-}
-
-
-/*!
-    \reimp
-*/
-QSize QCheckBox::sizeHint() const
-{
-    Q_D(const QCheckBox);
-    if (d->sizeHint.isValid())
-        return d->sizeHint;
-    ensurePolished();
-    QFontMetrics fm = fontMetrics();
-    QStyleOptionButton opt;
-    initStyleOption(&opt);
-    QSize sz = style()->itemTextRect(fm, QRect(), Qt::TextShowMnemonic, false,
-                                     text()).size();
-    if (!opt.icon.isNull())
-        sz = QSize(sz.width() + opt.iconSize.width() + 4, qMax(sz.height(), opt.iconSize.height()));
-    d->sizeHint = (style()->sizeFromContents(QStyle::CT_CheckBox, &opt, sz, this)
-                  .expandedTo(QApplication::globalStrut()));
-    return d->sizeHint;
-}
-
-
-/*!
-    \reimp
-*/
-QSize QCheckBox::minimumSizeHint() const
-{
-    return sizeHint();
-}
-
-/*!
-    \reimp
-*/
-void QCheckBox::paintEvent(QPaintEvent *)
-{
-    QStylePainter p(this);
-    QStyleOptionButton opt;
-    initStyleOption(&opt);
-    p.drawControl(QStyle::CE_CheckBox, opt);
-}
-
-/*!
-    \reimp
-*/
-void QCheckBox::mouseMoveEvent(QMouseEvent *e)
-{
-    Q_D(QCheckBox);
-    if (testAttribute(Qt::WA_Hover)) {
-        bool hit = false;
-        if (underMouse())
-            hit = hitButton(e->pos());
-
-        if (hit != d->hovering) {
-            update(rect());
-            d->hovering = hit;
-        }
-    }
-
-    QAbstractButton::mouseMoveEvent(e);
-}
-
-
-/*!
-    \reimp
-*/
-bool QCheckBox::hitButton(const QPoint &pos) const
-{
-    QStyleOptionButton opt;
-    initStyleOption(&opt);
-    return style()->subElementRect(QStyle::SE_CheckBoxClickRect, &opt, this).contains(pos);
-}
-
-/*!
-    \reimp
-*/
-void QCheckBox::checkStateSet()
-{
-    Q_D(QCheckBox);
-    d->noChange = false;
-    Qt::CheckState state = checkState();
-    if ((uint)state != d->publishedState) {
-        d->publishedState = state;
-        emit stateChanged(state);
-    }
-}
-
-/*!
-    \reimp
-*/
-void QCheckBox::nextCheckState()
-{
-    Q_D(QCheckBox);
-    if (d->tristate)
-        setCheckState((Qt::CheckState)((checkState() + 1) % 3));
-    else {
-        QAbstractButton::nextCheckState();
-        QCheckBox::checkStateSet();
-    }
-}
-
-/*!
-    \reimp
-*/
-bool QCheckBox::event(QEvent *e)
-{
-    Q_D(QCheckBox);
-    if (e->type() == QEvent::StyleChange
-#ifdef Q_WS_MAC
-            || e->type() == QEvent::MacSizeChange
-#endif
-            )
-        d->setLayoutItemMargins(QStyle::SE_CheckBoxLayoutItem);
-    return QAbstractButton::event(e);
-}
-
-#ifdef QT3_SUPPORT
-/*!
-    Use one of the constructors that doesn't take the \a name
-    argument and then use setObjectName() instead.
-*/
-QCheckBox::QCheckBox(QWidget *parent, const char* name)
-    : QAbstractButton (*new QCheckBoxPrivate, parent)
-{
-    Q_D(QCheckBox);
-    setObjectName(QString::fromAscii(name));
-    d->init();
-}
-
-/*!
-    Use one of the constructors that doesn't take the \a name
-    argument and then use setObjectName() instead.
-*/
-QCheckBox::QCheckBox(const QString &text, QWidget *parent, const char* name)
-    : QAbstractButton (*new QCheckBoxPrivate, parent)
-{
-    Q_D(QCheckBox);
-    setObjectName(QString::fromAscii(name));
-    d->init();
-    setText(text);
-}
-
-#endif
-
-
-/*!
-    \fn void QCheckBox::setNoChange()
-    \compat
-
-    Use setCheckState() instead.
-*/
-
-/*!
-    \fn void QCheckBox::setState(ToggleState state)
-    \compat
-
-    Use setCheckState() instead.
-*/
-
-/*!
-    \fn QCheckBox::ToggleState QCheckBox::state() const
-    \compat
-
-    Use checkState() instead.
-*/
-
-QT_END_NAMESPACE