qdialogbuttonbox.cpp

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#include <QtCore/qhash.h>
#include <QtGui/qpushbutton.h>
#include <QtGui/qstyle.h>
#include <QtGui/qlayout.h>
#include <QtGui/qdialog.h>
#include <QtGui/qapplication.h>
#include <QtGui/private/qwidget_p.h>
#include <QtGui/qaction.h>

#include "qdialogbuttonbox.h"

#ifdef QT_SOFTKEYS_ENABLED
#include <QtGui/qaction.h>
#endif


QT_BEGIN_NAMESPACE

enum {
    AcceptRole      = QDialogButtonBox::AcceptRole,
    RejectRole      = QDialogButtonBox::RejectRole,
    DestructiveRole = QDialogButtonBox::DestructiveRole,
    ActionRole      = QDialogButtonBox::ActionRole,
    HelpRole        = QDialogButtonBox::HelpRole,
    YesRole         = QDialogButtonBox::YesRole,
    NoRole          = QDialogButtonBox::NoRole,
    ApplyRole       = QDialogButtonBox::ApplyRole,
    ResetRole       = QDialogButtonBox::ResetRole,

    AlternateRole   = 0x10000000,
    Stretch         = 0x20000000,
    EOL             = 0x40000000,
    Reverse         = 0x80000000
};

static QDialogButtonBox::ButtonRole roleFor(QDialogButtonBox::StandardButton button)
{
    switch (button) {
    case QDialogButtonBox::Ok:
    case QDialogButtonBox::Save:
    case QDialogButtonBox::Open:
    case QDialogButtonBox::SaveAll:
    case QDialogButtonBox::Retry:
    case QDialogButtonBox::Ignore:
        return QDialogButtonBox::AcceptRole;

    case QDialogButtonBox::Cancel:
    case QDialogButtonBox::Close:
    case QDialogButtonBox::Abort:
        return QDialogButtonBox::RejectRole;

    case QDialogButtonBox::Discard:
        return QDialogButtonBox::DestructiveRole;

    case QDialogButtonBox::Help:
        return QDialogButtonBox::HelpRole;

    case QDialogButtonBox::Apply:
        return QDialogButtonBox::ApplyRole;

    case QDialogButtonBox::Yes:
    case QDialogButtonBox::YesToAll:
        return QDialogButtonBox::YesRole;

    case QDialogButtonBox::No:
    case QDialogButtonBox::NoToAll:
        return QDialogButtonBox::NoRole;

    case QDialogButtonBox::RestoreDefaults:
    case QDialogButtonBox::Reset:
        return QDialogButtonBox::ResetRole;

    case QDialogButtonBox::NoButton:    // NoButton means zero buttons, not "No" button
        ;
    }

    return QDialogButtonBox::InvalidRole;
}

static const uint layouts[2][5][14] =
{
    // Qt::Horizontal
    {
        // WinLayout
        { ResetRole, Stretch, YesRole, AcceptRole, AlternateRole, DestructiveRole, NoRole, ActionRole, RejectRole, ApplyRole,
           HelpRole, EOL, EOL, EOL },

        // MacLayout
        { HelpRole, ResetRole, ApplyRole, ActionRole, Stretch, DestructiveRole | Reverse,
          AlternateRole | Reverse, RejectRole | Reverse, AcceptRole | Reverse, NoRole | Reverse, YesRole | Reverse, EOL, EOL },

        // KdeLayout
        { HelpRole, ResetRole, Stretch, YesRole, NoRole, ActionRole, AcceptRole, AlternateRole,
          ApplyRole, DestructiveRole, RejectRole, EOL },

        // GnomeLayout
        { HelpRole, ResetRole, Stretch, ActionRole, ApplyRole | Reverse, DestructiveRole | Reverse,
          AlternateRole | Reverse, RejectRole | Reverse, AcceptRole | Reverse, NoRole | Reverse, YesRole | Reverse, EOL },

        // Mac modeless
        { ResetRole, ApplyRole, ActionRole, Stretch, HelpRole, EOL, EOL, EOL, EOL, EOL, EOL, EOL, EOL, EOL }
    },

    // Qt::Vertical
    {
        // WinLayout
        { ActionRole, YesRole, AcceptRole, AlternateRole, DestructiveRole, NoRole, RejectRole, ApplyRole, ResetRole,
          HelpRole, Stretch, EOL, EOL, EOL },

        // MacLayout
        { YesRole, NoRole, AcceptRole, RejectRole, AlternateRole, DestructiveRole, Stretch, ActionRole, ApplyRole,
          ResetRole, HelpRole, EOL, EOL },

        // KdeLayout
        { AcceptRole, AlternateRole, ApplyRole, ActionRole, YesRole, NoRole, Stretch, ResetRole,
          DestructiveRole, RejectRole, HelpRole, EOL },

        // GnomeLayout
        { YesRole, NoRole, AcceptRole, RejectRole, AlternateRole, DestructiveRole, ApplyRole, ActionRole, Stretch,
          ResetRole, HelpRole, EOL, EOL, EOL },

        // Mac modeless
        { ActionRole, ApplyRole, ResetRole, Stretch, HelpRole, EOL, EOL, EOL, EOL, EOL, EOL, EOL, EOL, EOL }
    }
};

#if defined(QT_SOFTKEYS_ENABLED) && !defined(QT_NO_ACTION)
class QDialogButtonEnabledProxy : public QObject
{
public:
    QDialogButtonEnabledProxy(QObject *parent, QWidget *src, QAction *trg) : QObject(parent), source(src), target(trg)
    {
        source->installEventFilter(this);
        target->setEnabled(source->isEnabled());
    }
    ~QDialogButtonEnabledProxy()
    {
        source->removeEventFilter(this);
    }
    bool eventFilter(QObject *object, QEvent *event)
    {
        if (object == source && event->type() == QEvent::EnabledChange) {
            target->setEnabled(source->isEnabled());
        }
        return false;
    };
private:
    QWidget *source;
    QAction *target;
};
#endif

class QDialogButtonBoxPrivate : public QWidgetPrivate
{
    Q_DECLARE_PUBLIC(QDialogButtonBox)

public:
    QDialogButtonBoxPrivate(Qt::Orientation orient);

    QList<QAbstractButton *> buttonLists[QDialogButtonBox::NRoles];
    QHash<QPushButton *, QDialogButtonBox::StandardButton> standardButtonHash;
#ifdef QT_SOFTKEYS_ENABLED
    QHash<QAbstractButton *, QAction *> softKeyActions;
#endif

    Qt::Orientation orientation;
    QDialogButtonBox::ButtonLayout layoutPolicy;
    QBoxLayout *buttonLayout;
    bool internalRemove;
    bool center;

    void createStandardButtons(QDialogButtonBox::StandardButtons buttons);

    void layoutButtons();
    void initLayout();
    void resetLayout();
    QPushButton *createButton(QDialogButtonBox::StandardButton button, bool doLayout = true);
    void addButton(QAbstractButton *button, QDialogButtonBox::ButtonRole role, bool doLayout = true);
    void _q_handleButtonDestroyed();
    void _q_handleButtonClicked();
    void addButtonsToLayout(const QList<QAbstractButton *> &buttonList, bool reverse);
    void retranslateStrings();
    const char *standardButtonText(QDialogButtonBox::StandardButton sbutton) const;
#if defined(QT_SOFTKEYS_ENABLED) && !defined(QT_NO_ACTION)
    QAction *createSoftKey(QAbstractButton *button, QDialogButtonBox::ButtonRole role);
#endif
};

QDialogButtonBoxPrivate::QDialogButtonBoxPrivate(Qt::Orientation orient)
    : orientation(orient), buttonLayout(0), internalRemove(false), center(false)
{
}

void QDialogButtonBoxPrivate::initLayout()
{
    Q_Q(QDialogButtonBox);
    layoutPolicy = QDialogButtonBox::ButtonLayout(q->style()->styleHint(QStyle::SH_DialogButtonLayout, 0, q));
    bool createNewLayout = buttonLayout == 0
        || (orientation == Qt::Horizontal && qobject_cast<QVBoxLayout *>(buttonLayout) != 0)
        || (orientation == Qt::Vertical && qobject_cast<QHBoxLayout *>(buttonLayout) != 0);
    if (createNewLayout) {
        delete buttonLayout;
        if (orientation == Qt::Horizontal)
            buttonLayout = new QHBoxLayout(q);
        else
            buttonLayout = new QVBoxLayout(q);
    }

    int left, top, right, bottom;
    setLayoutItemMargins(QStyle::SE_PushButtonLayoutItem);
    getLayoutItemMargins(&left, &top, &right, &bottom);
    buttonLayout->setContentsMargins(-left, -top, -right, -bottom);

    if (!q->testAttribute(Qt::WA_WState_OwnSizePolicy)) {
        QSizePolicy sp(QSizePolicy::Expanding, QSizePolicy::Fixed, QSizePolicy::ButtonBox);
        if (orientation == Qt::Vertical)
            sp.transpose();
        q->setSizePolicy(sp);
        q->setAttribute(Qt::WA_WState_OwnSizePolicy, false);
    }

    // ### move to a real init() function
    q->setFocusPolicy(Qt::TabFocus);
}

void QDialogButtonBoxPrivate::resetLayout()
{
    //delete buttonLayout;
    initLayout();
    layoutButtons();
}

void QDialogButtonBoxPrivate::addButtonsToLayout(const QList<QAbstractButton *> &buttonList,
                                                 bool reverse)
{
    int start = reverse ? buttonList.count() - 1 : 0;
    int end = reverse ? -1 : buttonList.count();
    int step = reverse ? -1 : 1;

    for (int i = start; i != end; i += step) {
        QAbstractButton *button = buttonList.at(i);
        buttonLayout->addWidget(button);
        button->show();
    }
}

void QDialogButtonBoxPrivate::layoutButtons()
{
    Q_Q(QDialogButtonBox);
    const int MacGap = 36 - 8;    // 8 is the default gap between a widget and a spacer item

    for (int i = buttonLayout->count() - 1; i >= 0; --i) {
        QLayoutItem *item = buttonLayout->takeAt(i);
        if (QWidget *widget = item->widget())
            widget->hide();
        delete item;
    }

    int tmpPolicy = layoutPolicy;

    static const int M = 5;
    static const int ModalRoles[M] = { AcceptRole, RejectRole, DestructiveRole, YesRole, NoRole };
    if (tmpPolicy == QDialogButtonBox::MacLayout) {
        bool hasModalButton = false;
        for (int i = 0; i < M; ++i) {
            if (!buttonLists[ModalRoles[i]].isEmpty()) {
                hasModalButton = true;
                break;
            }
        }
        if (!hasModalButton)
            tmpPolicy = 4;  // Mac modeless
    }

    const uint *currentLayout = layouts[orientation == Qt::Vertical][tmpPolicy];

    if (center)
        buttonLayout->addStretch();

    QList<QAbstractButton *> acceptRoleList = buttonLists[AcceptRole];

    while (*currentLayout != EOL) {
        int role = (*currentLayout & ~Reverse);
        bool reverse = (*currentLayout & Reverse);

        switch (role) {
        case Stretch:
            if (!center)
                buttonLayout->addStretch();
            break;
        case AcceptRole: {
            if (acceptRoleList.isEmpty())
                break;
            // Only the first one
            QAbstractButton *button = acceptRoleList.first();
            buttonLayout->addWidget(button);
            button->show();
        }
            break;
        case AlternateRole:
            {
                if (acceptRoleList.size() < 2)
                    break;
                QList<QAbstractButton *> list = acceptRoleList;
                list.removeFirst();
                addButtonsToLayout(list, reverse);
            }
            break;
        case DestructiveRole:
            {
                const QList<QAbstractButton *> &list = buttonLists[role];

                /*
                    Mac: Insert a gap on the left of the destructive
                    buttons to ensure that they don't get too close to
                    the help and action buttons (but only if there are
                    some buttons to the left of the destructive buttons
                    (and the stretch, whence buttonLayout->count() > 1
                    and not 0)).
                */
                if (tmpPolicy == QDialogButtonBox::MacLayout
                        && !list.isEmpty() && buttonLayout->count() > 1)
                    buttonLayout->addSpacing(MacGap);

                addButtonsToLayout(list, reverse);

                /*
                    Insert a gap between the destructive buttons and the
                    accept and reject buttons.
                */
                if (tmpPolicy == QDialogButtonBox::MacLayout && !list.isEmpty())
                    buttonLayout->addSpacing(MacGap);
            }
            break;
        case RejectRole:
        case ActionRole:
        case HelpRole:
        case YesRole:
        case NoRole:
        case ApplyRole:
        case ResetRole:
            addButtonsToLayout(buttonLists[role], reverse);
        }
        ++currentLayout;
    }

    QWidget *lastWidget = 0;
    q->setFocusProxy(0);
    for (int i = 0; i < buttonLayout->count(); ++i) {
        QLayoutItem *item = buttonLayout->itemAt(i);
        if (QWidget *widget = item->widget()) {
            if (lastWidget)
                QWidget::setTabOrder(lastWidget, widget);
            else
                q->setFocusProxy(widget);
            lastWidget = widget;
        }
    }

    if (center)
        buttonLayout->addStretch();
}

QPushButton *QDialogButtonBoxPrivate::createButton(QDialogButtonBox::StandardButton sbutton,
                                                   bool doLayout)
{
    Q_Q(QDialogButtonBox);
    const char *buttonText = 0;
    int icon = 0;

    switch (sbutton) {
    case QDialogButtonBox::Ok:
        icon = QStyle::SP_DialogOkButton;
        break;
    case QDialogButtonBox::Save:
        icon = QStyle::SP_DialogSaveButton;
        break;
    case QDialogButtonBox::Open:
        icon = QStyle::SP_DialogOpenButton;
        break;
    case QDialogButtonBox::Cancel:
        icon = QStyle::SP_DialogCancelButton;
        break;
    case QDialogButtonBox::Close:
        icon = QStyle::SP_DialogCloseButton;
        break;
    case QDialogButtonBox::Apply:
        icon = QStyle::SP_DialogApplyButton;
        break;
    case QDialogButtonBox::Reset:
        icon = QStyle::SP_DialogResetButton;
        break;
    case QDialogButtonBox::Help:
        icon = QStyle::SP_DialogHelpButton;
        break;
    case QDialogButtonBox::Discard:
        icon = QStyle::SP_DialogDiscardButton;
        break;
    case QDialogButtonBox::Yes:
        icon = QStyle::SP_DialogYesButton;
        break;
    case QDialogButtonBox::No:
        icon = QStyle::SP_DialogNoButton;
        break;
    case QDialogButtonBox::YesToAll:
    case QDialogButtonBox::NoToAll:
    case QDialogButtonBox::SaveAll:
    case QDialogButtonBox::Abort:
    case QDialogButtonBox::Retry:
    case QDialogButtonBox::Ignore:
    case QDialogButtonBox::RestoreDefaults:
        break;
    case QDialogButtonBox::NoButton:
        return 0;
        ;
    }
    buttonText = standardButtonText(sbutton);

    QPushButton *button = new QPushButton(QDialogButtonBox::tr(buttonText), q);
    QStyle *style = q->style();
    if (style->styleHint(QStyle::SH_DialogButtonBox_ButtonsHaveIcons, 0, q) && icon != 0)
        button->setIcon(style->standardIcon(QStyle::StandardPixmap(icon), 0, q));
    if (style != QApplication::style()) // Propagate style
        button->setStyle(style);
    standardButtonHash.insert(button, sbutton);
    if (roleFor(sbutton) != QDialogButtonBox::InvalidRole) {
        addButton(button, roleFor(sbutton), doLayout);
    } else {
        qWarning("QDialogButtonBox::createButton: Invalid ButtonRole, button not added");
    }

#ifdef Q_WS_MAC
    // Since mnemonics is off by default on Mac, we add a Cmd-D
    // shortcut here to e.g. make the "Don't Save" button work nativly:
    if (sbutton == QDialogButtonBox::Discard)
        button->setShortcut(QKeySequence(QLatin1String("Ctrl+D")));
#endif

    return button;
}

void QDialogButtonBoxPrivate::addButton(QAbstractButton *button, QDialogButtonBox::ButtonRole role,
                                        bool doLayout)
{
    Q_Q(QDialogButtonBox);
    QObject::connect(button, SIGNAL(clicked()), q, SLOT(_q_handleButtonClicked()));
    QObject::connect(button, SIGNAL(destroyed()), q, SLOT(_q_handleButtonDestroyed()));
    buttonLists[role].append(button);
#if defined(QT_SOFTKEYS_ENABLED) && !defined(QT_NO_ACTION)
    QAction *action = createSoftKey(button, role);
    softKeyActions.insert(button, action);
    new QDialogButtonEnabledProxy(action, button, action);
#endif
    if (doLayout)
        layoutButtons();
}

#if defined(QT_SOFTKEYS_ENABLED) && !defined(QT_NO_ACTION)
QAction* QDialogButtonBoxPrivate::createSoftKey(QAbstractButton *button, QDialogButtonBox::ButtonRole role)
{
    Q_Q(QDialogButtonBox);
    QAction::SoftKeyRole softkeyRole;

    QAction *action = new QAction(button->text(), button);

    switch (role) {
    case ApplyRole:
    case AcceptRole:
    case YesRole:
    case ActionRole:
    case HelpRole:
        softkeyRole = QAction::PositiveSoftKey;
        break;
    case RejectRole:
    case DestructiveRole:
    case NoRole:
    case ResetRole:
        softkeyRole = QAction::NegativeSoftKey;
        break;
    default:
        break;
    }
    QObject::connect(action, SIGNAL(triggered()), button, SIGNAL(clicked()));
    action->setSoftKeyRole(softkeyRole);


    QWidget *dialog = 0;
    QWidget *p = q;
    while (p && !p->isWindow()) {
        p = p->parentWidget();
        if ((dialog = qobject_cast<QDialog *>(p)))
            break;
    }

    if (dialog) {
        dialog->addAction(action);
    } else {
        q->addAction(action);
    }

    return action;
}
#endif

void QDialogButtonBoxPrivate::createStandardButtons(QDialogButtonBox::StandardButtons buttons)
{
    uint i = QDialogButtonBox::FirstButton;
    while (i <= QDialogButtonBox::LastButton) {
        if (i & buttons) {
            createButton(QDialogButtonBox::StandardButton(i), false);
        }
        i = i << 1;
    }
    layoutButtons();
}

const char *QDialogButtonBoxPrivate::standardButtonText(QDialogButtonBox::StandardButton sbutton) const
{
    const char *buttonText = 0;
    bool gnomeLayout = (layoutPolicy == QDialogButtonBox::GnomeLayout);
    switch (sbutton) {
    case QDialogButtonBox::Ok:
        buttonText = gnomeLayout ? QT_TRANSLATE_NOOP("QDialogButtonBox", "&OK") : QT_TRANSLATE_NOOP("QDialogButtonBox", "OK");
        break;
    case QDialogButtonBox::Save:
        buttonText = gnomeLayout ? QT_TRANSLATE_NOOP("QDialogButtonBox", "&Save") : QT_TRANSLATE_NOOP("QDialogButtonBox", "Save");
        break;
    case QDialogButtonBox::Open:
        buttonText = QT_TRANSLATE_NOOP("QDialogButtonBox", "Open");
        break;
    case QDialogButtonBox::Cancel:
        buttonText = gnomeLayout ? QT_TRANSLATE_NOOP("QDialogButtonBox", "&Cancel") : QT_TRANSLATE_NOOP("QDialogButtonBox", "Cancel");
        break;
    case QDialogButtonBox::Close:
        buttonText = gnomeLayout ? QT_TRANSLATE_NOOP("QDialogButtonBox", "&Close") : QT_TRANSLATE_NOOP("QDialogButtonBox", "Close");
        break;
    case QDialogButtonBox::Apply:
        buttonText = QT_TRANSLATE_NOOP("QDialogButtonBox", "Apply");
        break;
    case QDialogButtonBox::Reset:
        buttonText = QT_TRANSLATE_NOOP("QDialogButtonBox", "Reset");
        break;
    case QDialogButtonBox::Help:
        buttonText = QT_TRANSLATE_NOOP("QDialogButtonBox", "Help");
        break;
    case QDialogButtonBox::Discard:
        if (layoutPolicy == QDialogButtonBox::MacLayout)
            buttonText = QT_TRANSLATE_NOOP("QDialogButtonBox", "Don't Save");
        else if (layoutPolicy == QDialogButtonBox::GnomeLayout)
            buttonText = QT_TRANSLATE_NOOP("QDialogButtonBox", "Close without Saving");
        else
            buttonText = QT_TRANSLATE_NOOP("QDialogButtonBox", "Discard");
        break;
    case QDialogButtonBox::Yes:
        buttonText = QT_TRANSLATE_NOOP("QDialogButtonBox", "&Yes");
        break;
    case QDialogButtonBox::YesToAll:
        buttonText = QT_TRANSLATE_NOOP("QDialogButtonBox", "Yes to &All");
        break;
    case QDialogButtonBox::No:
        buttonText = QT_TRANSLATE_NOOP("QDialogButtonBox", "&No");
        break;
    case QDialogButtonBox::NoToAll:
        buttonText = QT_TRANSLATE_NOOP("QDialogButtonBox", "N&o to All");
        break;
    case QDialogButtonBox::SaveAll:
        buttonText = QT_TRANSLATE_NOOP("QDialogButtonBox", "Save All");
        break;
    case QDialogButtonBox::Abort:
        buttonText = QT_TRANSLATE_NOOP("QDialogButtonBox", "Abort");
        break;
    case QDialogButtonBox::Retry:
        buttonText = QT_TRANSLATE_NOOP("QDialogButtonBox", "Retry");
        break;
    case QDialogButtonBox::Ignore:
        buttonText = QT_TRANSLATE_NOOP("QDialogButtonBox", "Ignore");
        break;
    case QDialogButtonBox::RestoreDefaults:
        buttonText = QT_TRANSLATE_NOOP("QDialogButtonBox", "Restore Defaults");
        break;
    case QDialogButtonBox::NoButton:
        ;
    } // switch
    return buttonText;
}

void QDialogButtonBoxPrivate::retranslateStrings()
{
    const char *buttonText = 0;
    QHash<QPushButton *, QDialogButtonBox::StandardButton>::iterator it =  standardButtonHash.begin();
    while (it != standardButtonHash.end()) {
        buttonText = standardButtonText(it.value());
        if (buttonText) {
            QPushButton *button = it.key();
            button->setText(QDialogButtonBox::tr(buttonText));
#if defined(QT_SOFTKEYS_ENABLED) && !defined(QT_NO_ACTION)
            QAction *action = softKeyActions.value(button, 0);
            if (action)
                action->setText(button->text());
#endif
        }
        ++it;
    }
}

QDialogButtonBox::QDialogButtonBox(QWidget *parent)
    : QWidget(*new QDialogButtonBoxPrivate(Qt::Horizontal), parent, 0)
{
    d_func()->initLayout();
}

QDialogButtonBox::QDialogButtonBox(Qt::Orientation orientation, QWidget *parent)
    : QWidget(*new QDialogButtonBoxPrivate(orientation), parent, 0)
{
    d_func()->initLayout();
}

QDialogButtonBox::QDialogButtonBox(StandardButtons buttons, Qt::Orientation orientation,
                                   QWidget *parent)
    : QWidget(*new QDialogButtonBoxPrivate(orientation), parent, 0)
{
    d_func()->initLayout();
    d_func()->createStandardButtons(buttons);
}

QDialogButtonBox::~QDialogButtonBox()
{
}

Qt::Orientation QDialogButtonBox::orientation() const
{
    return d_func()->orientation;
}

void QDialogButtonBox::setOrientation(Qt::Orientation orientation)
{
    Q_D(QDialogButtonBox);
    if (orientation == d->orientation)
        return;

    d->orientation = orientation;
    d->resetLayout();
}

void QDialogButtonBox::clear()
{
    Q_D(QDialogButtonBox);
#ifdef QT_SOFTKEYS_ENABLED
    // Delete softkey actions as they have the buttons as parents
    qDeleteAll(d->softKeyActions.values());
    d->softKeyActions.clear();
#endif
    // Remove the created standard buttons, they should be in the other lists, which will
    // do the deletion
    d->standardButtonHash.clear();
    for (int i = 0; i < NRoles; ++i) {
        QList<QAbstractButton *> &list = d->buttonLists[i];
        while (list.count()) {
            QAbstractButton *button = list.takeAt(0);
            QObject::disconnect(button, SIGNAL(destroyed()), this, SLOT(_q_handleButtonDestroyed()));
            delete button;
        }
    }
}

QList<QAbstractButton *> QDialogButtonBox::buttons() const
{
    Q_D(const QDialogButtonBox);
    QList<QAbstractButton *> finalList;
    for (int i = 0; i < NRoles; ++i) {
        const QList<QAbstractButton *> &list = d->buttonLists[i];
        for (int j = 0; j < list.count(); ++j)
            finalList.append(list.at(j));
    }
    return finalList;
}

QDialogButtonBox::ButtonRole QDialogButtonBox::buttonRole(QAbstractButton *button) const
{
    Q_D(const QDialogButtonBox);
    for (int i = 0; i < NRoles; ++i) {
        const QList<QAbstractButton *> &list = d->buttonLists[i];
        for (int j = 0; j < list.count(); ++j) {
            if (list.at(j) == button)
                return ButtonRole(i);
        }
    }
    return InvalidRole;
}

void QDialogButtonBox::removeButton(QAbstractButton *button)
{
    Q_D(QDialogButtonBox);

    if (!button)
        return;

    // Remove it from the standard button hash first and then from the roles
    if (QPushButton *pushButton = qobject_cast<QPushButton *>(button))
        d->standardButtonHash.remove(pushButton);
    for (int i = 0; i < NRoles; ++i) {
        QList<QAbstractButton *> &list = d->buttonLists[i];
        for (int j = 0; j < list.count(); ++j) {
            if (list.at(j) == button) {
                list.takeAt(j);
                if (!d->internalRemove) {
                    disconnect(button, SIGNAL(clicked()), this, SLOT(_q_handleButtonClicked()));
                    disconnect(button, SIGNAL(destroyed()), this, SLOT(_q_handleButtonDestroyed()));
                }
                break;
            }
        }
    }
#if defined(QT_SOFTKEYS_ENABLED) && !defined(QT_NO_ACTION)
    QAction *action = d->softKeyActions.value(button, 0);
    if (action) {
        d->softKeyActions.remove(button);
        delete action;
    }
#endif
    if (!d->internalRemove)
        button->setParent(0);
}

void QDialogButtonBox::addButton(QAbstractButton *button, ButtonRole role)
{
    Q_D(QDialogButtonBox);
    if (role <= InvalidRole || role >= NRoles) {
        qWarning("QDialogButtonBox::addButton: Invalid ButtonRole, button not added");
        return;
    }
    removeButton(button);
    button->setParent(this);
    d->addButton(button, role);
}

QPushButton *QDialogButtonBox::addButton(const QString &text, ButtonRole role)
{
    Q_D(QDialogButtonBox);
    if (role <= InvalidRole || role >= NRoles) {
        qWarning("QDialogButtonBox::addButton: Invalid ButtonRole, button not added");
        return 0;
    }
    QPushButton *button = new QPushButton(text, this);
    d->addButton(button, role);
    return button;
}

QPushButton *QDialogButtonBox::addButton(StandardButton button)
{
    Q_D(QDialogButtonBox);
    return d->createButton(button);
}

void QDialogButtonBox::setStandardButtons(StandardButtons buttons)
{
    Q_D(QDialogButtonBox);
#ifdef QT_SOFTKEYS_ENABLED
    // Delete softkey actions since they have the buttons as parents
    qDeleteAll(d->softKeyActions.values());
    d->softKeyActions.clear();
#endif
    // Clear out all the old standard buttons, then recreate them.
    qDeleteAll(d->standardButtonHash.keys());
    d->standardButtonHash.clear();

    d->createStandardButtons(buttons);
}

QDialogButtonBox::StandardButtons QDialogButtonBox::standardButtons() const
{
    Q_D(const QDialogButtonBox);
    StandardButtons standardButtons = NoButton;
    QHash<QPushButton *, StandardButton>::const_iterator it = d->standardButtonHash.constBegin();
    while (it != d->standardButtonHash.constEnd()) {
        standardButtons |= it.value();
        ++it;
    }
    return standardButtons;
}

QPushButton *QDialogButtonBox::button(StandardButton which) const
{
    Q_D(const QDialogButtonBox);
    return d->standardButtonHash.key(which);
}

QDialogButtonBox::StandardButton QDialogButtonBox::standardButton(QAbstractButton *button) const
{
    Q_D(const QDialogButtonBox);
    return d->standardButtonHash.value(static_cast<QPushButton *>(button));
}

void QDialogButtonBoxPrivate::_q_handleButtonClicked()
{
    Q_Q(QDialogButtonBox);
    if (QAbstractButton *button = qobject_cast<QAbstractButton *>(q->sender())) {
        emit q->clicked(button);

        switch (q->buttonRole(button)) {
        case AcceptRole:
        case YesRole:
            emit q->accepted();
            break;
        case RejectRole:
        case NoRole:
            emit q->rejected();
            break;
        case HelpRole:
            emit q->helpRequested();
            break;
        default:
            break;
        }
    }
}

void QDialogButtonBoxPrivate::_q_handleButtonDestroyed()
{
    Q_Q(QDialogButtonBox);
    if (QObject *object = q->sender()) {
        QBoolBlocker skippy(internalRemove);
        q->removeButton(static_cast<QAbstractButton *>(object));
    }
}

void QDialogButtonBox::setCenterButtons(bool center)
{
    Q_D(QDialogButtonBox);
    if (d->center != center) {
        d->center = center;
        d->resetLayout();
    }
}

bool QDialogButtonBox::centerButtons() const
{
    Q_D(const QDialogButtonBox);
    return d->center;
}

void QDialogButtonBox::changeEvent(QEvent *event)
{
    typedef QHash<QPushButton *, QDialogButtonBox::StandardButton> StandardButtonHash;

    Q_D(QDialogButtonBox);
    switch (event->type()) {
    case QEvent::StyleChange:  // Propagate style
        if (!d->standardButtonHash.empty()) {
            QStyle *newStyle = style();
            const StandardButtonHash::iterator end = d->standardButtonHash.end();
            for (StandardButtonHash::iterator it = d->standardButtonHash.begin(); it != end; ++it)
                it.key()->setStyle(newStyle);
        }
        // fallthrough intended
#ifdef Q_WS_MAC
    case QEvent::MacSizeChange:
#endif
        d->resetLayout();
        QWidget::changeEvent(event);
        break;
    default:
        QWidget::changeEvent(event);
        break;
    }
}

bool QDialogButtonBox::event(QEvent *event)
{
    Q_D(QDialogButtonBox);
    if (event->type() == QEvent::Show) {
        QList<QAbstractButton *> acceptRoleList = d->buttonLists[AcceptRole];
        QPushButton *firstAcceptButton = acceptRoleList.isEmpty() ? 0 : qobject_cast<QPushButton *>(acceptRoleList.at(0));
        bool hasDefault = false;
        QWidget *dialog = 0;
        QWidget *p = this;
        while (p && !p->isWindow()) {
            p = p->parentWidget();
            if ((dialog = qobject_cast<QDialog *>(p)))
                break;
        }

        foreach (QPushButton *pb, (dialog ? dialog : this)->findChildren<QPushButton *>()) {
            if (pb->isDefault() && pb != firstAcceptButton) {
                hasDefault = true;
                break;
            }
        }
        if (!hasDefault && firstAcceptButton)
            firstAcceptButton->setDefault(true);
#ifdef QT_SOFTKEYS_ENABLED
        if (dialog)
            setFixedSize(0,0);
#endif
    }else if (event->type() == QEvent::LanguageChange) {
        d->retranslateStrings();
    }
#if defined(QT_SOFTKEYS_ENABLED) && !defined(QT_NO_ACTION)
    else if (event->type() == QEvent::ParentChange) {
        QWidget *dialog = 0;
        QWidget *p = this;
        while (p && !p->isWindow()) {
            p = p->parentWidget();
            if ((dialog = qobject_cast<QDialog *>(p)))
                break;
        }

        // If the parent changes, then move the softkeys
        for (QHash<QAbstractButton *, QAction *>::const_iterator it = d->softKeyActions.constBegin();
            it != d->softKeyActions.constEnd(); ++it) {
            QAction *current = it.value();
            QList<QWidget *> widgets = current->associatedWidgets();
            foreach (QWidget *w, widgets)
                w->removeAction(current);
            if (dialog)
                dialog->addAction(current);
            else
                addAction(current);
        }
    }
#endif

    return QWidget::event(event);
}

QT_END_NAMESPACE

#include "moc_qdialogbuttonbox.cpp"