Long live Qt!

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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qdialog.h"
+
+
+#include "qevent.h"
+#include "qdesktopwidget.h"
+#include "qpushbutton.h"
+#include "qapplication.h"
+#include "qlayout.h"
+#include "qsizegrip.h"
+#include "qwhatsthis.h"
+#include "qmenu.h"
+#include "qcursor.h"
+#include "private/qdialog_p.h"
+#ifndef QT_NO_ACCESSIBILITY
+#include "qaccessible.h"
+#endif
+#if defined(Q_OS_WINCE)
+#include "qt_windows.h"
+#include "qmenubar.h"
+#include "qpointer.h"
+#include "qguifunctions_wince.h"
+extern bool qt_wince_is_mobile();     //defined in qguifunctions_wce.cpp
+extern bool qt_wince_is_smartphone(); //is defined in qguifunctions_wce.cpp
+#elif defined(Q_WS_X11)
+#  include "../kernel/qt_x11_p.h"
+#endif
+
+#ifndef SPI_GETSNAPTODEFBUTTON
+#  define SPI_GETSNAPTODEFBUTTON  95
+#endif
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class QDialog
+    \brief The QDialog class is the base class of dialog windows.
+
+    \ingroup dialogs
+    \ingroup abstractwidgets
+    \mainclass
+
+    A dialog window is a top-level window mostly used for short-term
+    tasks and brief communications with the user. QDialogs may be
+    modal or modeless. QDialogs can
+    provide a \link #return return
+    value\endlink, and they can have \link #default default
+    buttons\endlink. QDialogs can also have a QSizeGrip in their
+    lower-right corner, using setSizeGripEnabled().
+
+    Note that QDialog (an any other widget that has type Qt::Dialog) uses
+    the parent widget slightly differently from other classes in Qt. A
+    dialog is always a top-level widget, but if it has a parent, its
+    default location is centered on top of the parent's top-level widget
+    (if it is not top-level itself). It will also share the parent's
+    taskbar entry.
+
+    Use the overload of the QWidget::setParent() function to change
+    the ownership of a QDialog widget. This function allows you to
+    explicitly set the window flags of the reparented widget; using
+    the overloaded function will clear the window flags specifying the
+    window-system properties for the widget (in particular it will
+    reset the Qt::Dialog flag).
+
+    \section1 Modal Dialogs
+
+    A \bold{modal} dialog is a dialog that blocks input to other
+    visible windows in the same application. Dialogs that are used to
+    request a file name from the user or that are used to set
+    application preferences are usually modal. Dialogs can be
+    \l{Qt::ApplicationModal}{application modal} (the default) or
+    \l{Qt::WindowModal}{window modal}.
+
+    When an application modal dialog is opened, the user must finish
+    interacting with the dialog and close it before they can access
+    any other window in the application. Window modal dialogs only
+    block access to the window associated with the dialog, allowing
+    the user to continue to use other windows in an application.
+
+    The most common way to display a modal dialog is to call its
+    exec() function. When the user closes the dialog, exec() will
+    provide a useful \link #return return value\endlink. Typically,
+    to get the dialog to close and return the appropriate value, we
+    connect a default button, e.g. \gui OK, to the accept() slot and a
+    \gui Cancel button to the reject() slot.
+    Alternatively you can call the done() slot with \c Accepted or
+    \c Rejected.
+
+    An alternative is to call setModal(true) or setWindowModality(),
+    then show(). Unlike exec(), show() returns control to the caller
+    immediately. Calling setModal(true) is especially useful for
+    progress dialogs, where the user must have the ability to interact
+    with the dialog, e.g.  to cancel a long running operation. If you
+    use show() and setModal(true) together to perform a long operation,
+    you must call QApplication::processEvents() periodically during
+    processing to enable the user to interact with the dialog. (See
+    QProgressDialog.)
+
+    \section1 Modeless Dialogs
+
+    A \bold{modeless} dialog is a dialog that operates
+    independently of other windows in the same application. Find and
+    replace dialogs in word-processors are often modeless to allow the
+    user to interact with both the application's main window and with
+    the dialog.
+
+    Modeless dialogs are displayed using show(), which returns control
+    to the caller immediately.
+
+    If you invoke the \l{QWidget::show()}{show()} function after hiding
+    a dialog, the dialog will be displayed in its original position. This is
+    because the window manager decides the position for windows that
+    have not been explicitly placed by the programmer. To preserve the
+    position of a dialog that has been moved by the user, save its position
+    in your \l{QWidget::closeEvent()}{closeEvent()}  handler and then
+    move the dialog to that position, before showing it again.
+
+    \target default
+    \section1 Default Button
+
+    A dialog's \e default button is the button that's pressed when the
+    user presses Enter (Return). This button is used to signify that
+    the user accepts the dialog's settings and wants to close the
+    dialog. Use QPushButton::setDefault(), QPushButton::isDefault()
+    and QPushButton::autoDefault() to set and control the dialog's
+    default button.
+
+    \target escapekey
+    \section1 Escape Key
+
+    If the user presses the Esc key in a dialog, QDialog::reject()
+    will be called. This will cause the window to close: The \link
+    QCloseEvent close event \endlink cannot be \link
+    QCloseEvent::ignore() ignored \endlink.
+
+    \section1 Extensibility
+
+    Extensibility is the ability to show the dialog in two ways: a
+    partial dialog that shows the most commonly used options, and a
+    full dialog that shows all the options. Typically an extensible
+    dialog will initially appear as a partial dialog, but with a
+    \gui More toggle button. If the user presses the \gui More button down,
+    the dialog is expanded. The \l{Extension Example} shows how to achieve
+    extensible dialogs using Qt.
+
+    \target return
+    \section1 Return Value (Modal Dialogs)
+
+    Modal dialogs are often used in situations where a return value is
+    required, e.g. to indicate whether the user pressed \gui OK or
+    \gui Cancel. A dialog can be closed by calling the accept() or the
+    reject() slots, and exec() will return \c Accepted or \c Rejected
+    as appropriate. The exec() call returns the result of the dialog.
+    The result is also available from result() if the dialog has not
+    been destroyed.
+
+    In order to modify your dialog's close behavior, you can reimplement
+    the functions accept(), reject() or done(). The
+    \l{QWidget::closeEvent()}{closeEvent()} function should only be
+    reimplemented to preserve the dialog's position or to override the
+    standard close or reject behavior.
+
+    \target examples
+    \section1 Code Examples
+
+    A modal dialog:
+
+    \snippet doc/src/snippets/dialogs/dialogs.cpp 1
+
+    A modeless dialog:
+
+    \snippet doc/src/snippets/dialogs/dialogs.cpp 0
+
+    \sa QDialogButtonBox, QTabWidget, QWidget, QProgressDialog,
+        {fowler}{GUI Design Handbook: Dialogs, Standard}, {Extension Example},
+        {Standard Dialogs Example}
+*/
+
+/*! \enum QDialog::DialogCode
+
+    The value returned by a modal dialog.
+
+    \value Accepted
+    \value Rejected
+*/
+
+/*!
+  \property QDialog::sizeGripEnabled
+  \brief whether the size grip is enabled
+
+  A QSizeGrip is placed in the bottom-right corner of the dialog when this
+  property is enabled. By default, the size grip is disabled.
+*/
+
+
+/*!
+  Constructs a dialog with parent \a parent.
+
+  A dialog is always a top-level widget, but if it has a parent, its
+  default location is centered on top of the parent. It will also
+  share the parent's taskbar entry.
+
+  The widget flags \a f are passed on to the QWidget constructor.
+  If, for example, you don't want a What's This button in the title bar
+  of the dialog, pass Qt::WindowTitleHint | Qt::WindowSystemMenuHint in \a f.
+
+  \sa QWidget::setWindowFlags()
+*/
+
+QDialog::QDialog(QWidget *parent, Qt::WindowFlags f)
+    : QWidget(*new QDialogPrivate, parent,
+              f | QFlag((f & Qt::WindowType_Mask) == 0 ? Qt::Dialog : 0))
+{
+#ifdef Q_OS_WINCE
+    if (!qt_wince_is_smartphone())
+        setWindowFlags(windowFlags() | Qt::WindowOkButtonHint | QFlag(qt_wince_is_mobile() ? 0 : Qt::WindowCancelButtonHint));
+#endif
+}
+
+#ifdef QT3_SUPPORT
+/*!
+    \overload
+    \obsolete
+*/
+QDialog::QDialog(QWidget *parent, const char *name, bool modal, Qt::WindowFlags f)
+    : QWidget(*new QDialogPrivate, parent,
+              f
+              | QFlag(modal ? Qt::WShowModal : 0)
+              | QFlag((f & Qt::WindowType_Mask) == 0 ? Qt::Dialog : 0)
+        )
+{
+    setObjectName(QString::fromAscii(name));
+}
+#endif
+
+/*!
+  \overload
+  \internal
+*/
+QDialog::QDialog(QDialogPrivate &dd, QWidget *parent, Qt::WindowFlags f)
+    : QWidget(dd, parent, f | QFlag((f & Qt::WindowType_Mask) == 0 ? Qt::Dialog : 0))
+{
+#ifdef Q_OS_WINCE
+    if (!qt_wince_is_smartphone())
+        setWindowFlags(windowFlags() | Qt::WindowOkButtonHint | QFlag(qt_wince_is_mobile() ? 0 : Qt::WindowCancelButtonHint));
+#endif
+}
+
+/*!
+  Destroys the QDialog, deleting all its children.
+*/
+
+QDialog::~QDialog()
+{
+    // Need to hide() here, as our (to-be) overridden hide()
+    // will not be called in ~QWidget.
+    hide();
+}
+
+/*!
+  \internal
+  This function is called by the push button \a pushButton when it
+  becomes the default button. If \a pushButton is 0, the dialogs
+  default default button becomes the default button. This is what a
+  push button calls when it loses focus.
+*/
+void QDialogPrivate::setDefault(QPushButton *pushButton)
+{
+    Q_Q(QDialog);
+    bool hasMain = false;
+    QList<QPushButton*> list = qFindChildren<QPushButton*>(q);
+    for (int i=0; i<list.size(); ++i) {
+        QPushButton *pb = list.at(i);
+        if (pb->window() == q) {
+            if (pb == mainDef)
+                hasMain = true;
+            if (pb != pushButton)
+                pb->setDefault(false);
+        }
+    }
+    if (!pushButton && hasMain)
+        mainDef->setDefault(true);
+    if (!hasMain)
+        mainDef = pushButton;
+}
+
+/*!
+  \internal
+  This function sets the default default push button to \a pushButton.
+  This function is called by QPushButton::setDefault().
+*/
+void QDialogPrivate::setMainDefault(QPushButton *pushButton)
+{
+    mainDef = 0;
+    setDefault(pushButton);
+}
+
+/*!
+  \internal
+  Hides the default button indicator. Called when non auto-default
+  push button get focus.
+ */
+void QDialogPrivate::hideDefault()
+{
+    Q_Q(QDialog);
+    QList<QPushButton*> list = qFindChildren<QPushButton*>(q);
+    for (int i=0; i<list.size(); ++i) {
+        list.at(i)->setDefault(false);
+    }
+}
+
+void QDialogPrivate::resetModalitySetByOpen()
+{
+    Q_Q(QDialog);
+    if (resetModalityTo != -1 && !q->testAttribute(Qt::WA_SetWindowModality)) {
+        // open() changed the window modality and the user didn't touch it afterwards; restore it
+        q->setWindowModality(Qt::WindowModality(resetModalityTo));
+        q->setAttribute(Qt::WA_SetWindowModality, wasModalitySet);
+#ifdef Q_WS_MAC
+        Q_ASSERT(resetModalityTo != Qt::WindowModal);
+        q->setParent(q->parentWidget(), Qt::Dialog);
+#endif
+    }
+    resetModalityTo = -1;
+}
+
+#ifdef Q_OS_WINCE
+#ifdef Q_OS_WINCE_WM
+void QDialogPrivate::_q_doneAction()
+{
+    //Done...
+    QApplication::postEvent(q_func(), new QEvent(QEvent::OkRequest));
+}
+#endif
+
+/*!
+    \reimp
+*/
+bool QDialog::event(QEvent *e)
+{
+    bool result = QWidget::event(e);
+    if (e->type() == QEvent::OkRequest) {
+        accept();
+        result = true;
+     }
+    return result;
+}
+#endif
+
+/*!
+  Returns the modal dialog's result code, \c Accepted or \c Rejected.
+
+  Do not call this function if the dialog was constructed with the
+  Qt::WA_DeleteOnClose attribute.
+*/
+int QDialog::result() const
+{
+    Q_D(const QDialog);
+    return d->rescode;
+}
+
+/*!
+  \fn void QDialog::setResult(int i)
+
+  Sets the modal dialog's result code to \a i.
+
+  \note We recommend that you use one of the values defined by
+  QDialog::DialogCode.
+*/
+void QDialog::setResult(int r)
+{
+    Q_D(QDialog);
+    d->rescode = r;
+}
+
+/*!
+    \since 4.5
+
+    Shows the dialog as a \l{QDialog#Modal Dialogs}{window modal dialog},
+    returning immediately.
+
+    \sa exec(), show(), result(), setWindowModality()
+*/
+void QDialog::open()
+{
+    Q_D(QDialog);
+
+    Qt::WindowModality modality = windowModality();
+    if (modality != Qt::WindowModal) {
+        d->resetModalityTo = modality;
+        d->wasModalitySet = testAttribute(Qt::WA_SetWindowModality);
+        setWindowModality(Qt::WindowModal);
+        setAttribute(Qt::WA_SetWindowModality, false);
+#ifdef Q_WS_MAC
+        setParent(parentWidget(), Qt::Sheet);
+#endif
+    }
+
+    setResult(0);
+    show();
+}
+
+/*!
+    Shows the dialog as a \l{QDialog#Modal Dialogs}{modal dialog},
+    blocking until the user closes it. The function returns a \l
+    DialogCode result.
+
+    If the dialog is \l{Qt::ApplicationModal}{application modal}, users cannot
+    interact with any other window in the same application until they close
+    the dialog. If the dialog is \l{Qt::ApplicationModal}{window modal}, only
+    interaction with the parent window is blocked while the dialog is open.
+    By default, the dialog is application modal.
+
+    \sa open(), show(), result(), setWindowModality()
+*/
+
+int QDialog::exec()
+{
+    Q_D(QDialog);
+
+    if (d->eventLoop) {
+        qWarning("QDialog::exec: Recursive call detected");
+        return -1;
+    }
+
+    bool deleteOnClose = testAttribute(Qt::WA_DeleteOnClose);
+    setAttribute(Qt::WA_DeleteOnClose, false);
+
+    d->resetModalitySetByOpen();
+
+    bool wasShowModal = testAttribute(Qt::WA_ShowModal);
+    setAttribute(Qt::WA_ShowModal, true);
+    setResult(0);
+
+//On Windows Mobile we create an empty menu to hide the current menu
+#ifdef Q_OS_WINCE_WM
+#ifndef QT_NO_MENUBAR
+    QMenuBar *menuBar = 0;
+    if (!findChild<QMenuBar *>())
+        menuBar = new QMenuBar(this);
+    if (qt_wince_is_smartphone()) {
+        QAction *doneAction = new QAction(tr("Done"), this);
+        menuBar->setDefaultAction(doneAction);
+        connect(doneAction, SIGNAL(triggered()), this, SLOT(_q_doneAction()));
+    }
+#endif //QT_NO_MENUBAR
+#endif //Q_OS_WINCE_WM
+
+    show();
+
+#ifdef Q_WS_MAC
+    d->mac_nativeDialogModalHelp();
+#endif
+
+    QEventLoop eventLoop;
+    d->eventLoop = &eventLoop;
+    QPointer<QDialog> guard = this;
+    (void) eventLoop.exec(QEventLoop::DialogExec);
+    if (guard.isNull())
+        return QDialog::Rejected;
+    d->eventLoop = 0;
+
+    setAttribute(Qt::WA_ShowModal, wasShowModal);
+
+    int res = result();
+    if (deleteOnClose)
+        delete this;
+#ifdef Q_OS_WINCE_WM
+#ifndef QT_NO_MENUBAR
+    else if (menuBar)
+        delete menuBar;
+#endif //QT_NO_MENUBAR
+#endif //Q_OS_WINCE_WM
+    return res;
+}
+
+
+/*!
+  Closes the dialog and sets its result code to \a r. If this dialog
+  is shown with exec(), done() causes the local event loop to finish,
+  and exec() to return \a r.
+
+  As with QWidget::close(), done() deletes the dialog if the
+  Qt::WA_DeleteOnClose flag is set. If the dialog is the application's
+  main widget, the application terminates. If the dialog is the
+  last window closed, the QApplication::lastWindowClosed() signal is
+  emitted.
+
+  \sa accept(), reject(), QApplication::activeWindow(), QApplication::quit()
+*/
+
+void QDialog::done(int r)
+{
+    Q_D(QDialog);
+    hide();
+    setResult(r);
+
+    d->close_helper(QWidgetPrivate::CloseNoEvent);
+    d->resetModalitySetByOpen();
+
+    emit finished(r);
+    if (r == Accepted)
+        emit accepted();
+    else if (r == Rejected)
+        emit rejected();
+}
+
+/*!
+  Hides the modal dialog and sets the result code to \c Accepted.
+
+  \sa reject() done()
+*/
+
+void QDialog::accept()
+{
+    done(Accepted);
+}
+
+/*!
+  Hides the modal dialog and sets the result code to \c Rejected.
+
+  \sa accept() done()
+*/
+
+void QDialog::reject()
+{
+    done(Rejected);
+}
+
+/*! \reimp */
+bool QDialog::eventFilter(QObject *o, QEvent *e)
+{
+    return QWidget::eventFilter(o, e);
+}
+
+/*****************************************************************************
+  Event handlers
+ *****************************************************************************/
+
+#ifndef QT_NO_CONTEXTMENU
+/*! \reimp */
+void QDialog::contextMenuEvent(QContextMenuEvent *e)
+{
+#if defined(QT_NO_WHATSTHIS) || defined(QT_NO_MENU)
+    Q_UNUSED(e);
+#else
+    QWidget *w = childAt(e->pos());
+    if (!w) {
+        w = rect().contains(e->pos()) ? this : 0;
+        if (!w)
+            return;
+    }
+    while (w && w->whatsThis().size() == 0 && !w->testAttribute(Qt::WA_CustomWhatsThis))
+        w = w->isWindow() ? 0 : w->parentWidget();
+    if (w) {
+        QMenu p(this);
+        QAction *wt = p.addAction(tr("What's This?"));
+        if (p.exec(e->globalPos()) == wt) {
+            QHelpEvent e(QEvent::WhatsThis, w->rect().center(),
+                         w->mapToGlobal(w->rect().center()));
+            QApplication::sendEvent(w, &e);
+        }
+    }
+#endif
+}
+#endif // QT_NO_CONTEXTMENU
+
+/*! \reimp */
+void QDialog::keyPressEvent(QKeyEvent *e)
+{
+    //   Calls reject() if Escape is pressed. Simulates a button
+    //   click for the default button if Enter is pressed. Move focus
+    //   for the arrow keys. Ignore the rest.
+#ifdef Q_WS_MAC
+    if(e->modifiers() == Qt::ControlModifier && e->key() == Qt::Key_Period) {
+        reject();
+    } else
+#endif
+    if (!e->modifiers() || (e->modifiers() & Qt::KeypadModifier && e->key() == Qt::Key_Enter)) {
+        switch (e->key()) {
+        case Qt::Key_Enter:
+        case Qt::Key_Return: {
+            QList<QPushButton*> list = qFindChildren<QPushButton*>(this);
+            for (int i=0; i<list.size(); ++i) {
+                QPushButton *pb = list.at(i);
+                if (pb->isDefault() && pb->isVisible()) {
+                    if (pb->isEnabled())
+                        pb->click();
+                    return;
+                }
+            }
+        }
+        break;
+        case Qt::Key_Escape:
+            reject();
+            break;
+        case Qt::Key_Up:
+        case Qt::Key_Left:
+            if (focusWidget() &&
+                 (focusWidget()->focusPolicy() == Qt::StrongFocus ||
+                   focusWidget()->focusPolicy() == Qt::WheelFocus)) {
+                e->ignore();
+                break;
+            }
+            // call ours, since c++ blocks us from calling the one
+            // belonging to focusWidget().
+            focusNextPrevChild(false);
+            break;
+        case Qt::Key_Down:
+        case Qt::Key_Right:
+            if (focusWidget() &&
+                 (focusWidget()->focusPolicy() == Qt::StrongFocus ||
+                   focusWidget()->focusPolicy() == Qt::WheelFocus)) {
+                e->ignore();
+                break;
+            }
+            focusNextPrevChild(true);
+            break;
+        default:
+            e->ignore();
+            return;
+        }
+    } else {
+        e->ignore();
+    }
+}
+
+/*! \reimp */
+void QDialog::closeEvent(QCloseEvent *e)
+{
+#ifndef QT_NO_WHATSTHIS
+    if (isModal() && QWhatsThis::inWhatsThisMode())
+        QWhatsThis::leaveWhatsThisMode();
+#endif
+    if (isVisible()) {
+        QPointer<QObject> that = this;
+        reject();
+        if (that && isVisible())
+            e->ignore();
+    } else {
+        e->accept();
+    }
+}
+
+/*****************************************************************************
+  Geometry management.
+ *****************************************************************************/
+
+/*! \reimp
+*/
+
+void QDialog::setVisible(bool visible)
+{
+    Q_D(QDialog);
+    if (visible) {
+        if (testAttribute(Qt::WA_WState_ExplicitShowHide) && !testAttribute(Qt::WA_WState_Hidden))
+            return;
+
+        if (!testAttribute(Qt::WA_Moved)) {
+            Qt::WindowStates state = windowState();
+            adjustPosition(parentWidget());
+            setAttribute(Qt::WA_Moved, false); // not really an explicit position
+            if (state != windowState())
+                setWindowState(state);
+        }
+        QWidget::setVisible(visible);
+        showExtension(d->doShowExtension);
+        QWidget *fw = window()->focusWidget();
+        if (!fw)
+            fw = this;
+
+        /*
+          The following block is to handle a special case, and does not
+          really follow propper logic in concern of autoDefault and TAB
+          order. However, it's here to ease usage for the users. If a
+          dialog has a default QPushButton, and first widget in the TAB
+          order also is a QPushButton, then we give focus to the main
+          default QPushButton. This simplifies code for the developers,
+          and actually catches most cases... If not, then they simply
+          have to use [widget*]->setFocus() themselves...
+        */
+        if (d->mainDef && fw->focusPolicy() == Qt::NoFocus) {
+            QWidget *first = fw;
+            while ((first = first->nextInFocusChain()) != fw && first->focusPolicy() == Qt::NoFocus)
+                ;
+            if (first != d->mainDef && qobject_cast<QPushButton*>(first))
+                d->mainDef->setFocus();
+        }
+        if (!d->mainDef && isWindow()) {
+            QWidget *w = fw;
+            while ((w = w->nextInFocusChain()) != fw) {
+                QPushButton *pb = qobject_cast<QPushButton *>(w);
+                if (pb && pb->autoDefault() && pb->focusPolicy() != Qt::NoFocus) {
+                    pb->setDefault(true);
+                    break;
+                }
+            }
+        }
+        if (fw && !fw->hasFocus()) {
+            QFocusEvent e(QEvent::FocusIn, Qt::TabFocusReason);
+            QApplication::sendEvent(fw, &e);
+        }
+
+#ifndef QT_NO_ACCESSIBILITY
+        QAccessible::updateAccessibility(this, 0, QAccessible::DialogStart);
+#endif
+
+    } else {
+        if (testAttribute(Qt::WA_WState_ExplicitShowHide) && testAttribute(Qt::WA_WState_Hidden))
+            return;
+
+#ifndef QT_NO_ACCESSIBILITY
+        if (isVisible())
+            QAccessible::updateAccessibility(this, 0, QAccessible::DialogEnd);
+#endif
+
+        // Reimplemented to exit a modal event loop when the dialog is hidden.
+        QWidget::setVisible(visible);
+        if (d->eventLoop)
+            d->eventLoop->exit();
+    }
+#ifdef Q_WS_WIN
+    if (d->mainDef && isActiveWindow()) {
+        BOOL snapToDefault = false;
+        if ( QT_WA_INLINE( SystemParametersInfo(SPI_GETSNAPTODEFBUTTON, 0, &snapToDefault, 0) ,
+                           SystemParametersInfoA(SPI_GETSNAPTODEFBUTTON, 0, &snapToDefault, 0) )) {
+            if (snapToDefault)
+                QCursor::setPos(d->mainDef->mapToGlobal(d->mainDef->rect().center()));
+        }
+    }
+#endif
+}
+
+/*!\reimp */
+void QDialog::showEvent(QShowEvent *event)
+{
+    if (!event->spontaneous() && !testAttribute(Qt::WA_Moved)) {
+	Qt::WindowStates  state = windowState();
+        adjustPosition(parentWidget());
+        setAttribute(Qt::WA_Moved, false); // not really an explicit position
+	if (state != windowState())
+	    setWindowState(state);
+    }
+}
+
+/*! \internal */
+void QDialog::adjustPosition(QWidget* w)
+{
+#ifdef Q_WS_X11
+    // if the WM advertises that it will place the windows properly for us, let it do it :)
+    if (X11->isSupportedByWM(ATOM(_NET_WM_FULL_PLACEMENT)))
+        return;
+#endif
+
+    QPoint p(0, 0);
+    int extraw = 0, extrah = 0, scrn = 0;
+    if (w)
+        w = w->window();
+    QRect desk;
+    if (w) {
+        scrn = QApplication::desktop()->screenNumber(w);
+    } else if (QApplication::desktop()->isVirtualDesktop()) {
+        scrn = QApplication::desktop()->screenNumber(QCursor::pos());
+    } else {
+        scrn = QApplication::desktop()->screenNumber(this);
+    }
+    desk = QApplication::desktop()->availableGeometry(scrn);
+
+    QWidgetList list = QApplication::topLevelWidgets();
+    for (int i = 0; (extraw == 0 || extrah == 0) && i < list.size(); ++i) {
+        QWidget * current = list.at(i);
+        if (current->isVisible()) {
+            int framew = current->geometry().x() - current->x();
+            int frameh = current->geometry().y() - current->y();
+
+            extraw = qMax(extraw, framew);
+            extrah = qMax(extrah, frameh);
+        }
+    }
+
+    // sanity check for decoration frames. With embedding, we
+    // might get extraordinary values
+    if (extraw == 0 || extrah == 0 || extraw >= 10 || extrah >= 40) {
+        extrah = 40;
+        extraw = 10;
+    }
+
+
+    if (w) {
+        // Use mapToGlobal rather than geometry() in case w might
+        // be embedded in another application
+        QPoint pp = w->mapToGlobal(QPoint(0,0));
+        p = QPoint(pp.x() + w->width()/2,
+                    pp.y() + w->height()/ 2);
+    } else {
+        // p = middle of the desktop
+        p = QPoint(desk.x() + desk.width()/2, desk.y() + desk.height()/2);
+    }
+
+    // p = origin of this
+    p = QPoint(p.x()-width()/2 - extraw,
+                p.y()-height()/2 - extrah);
+
+
+    if (p.x() + extraw + width() > desk.x() + desk.width())
+        p.setX(desk.x() + desk.width() - width() - extraw);
+    if (p.x() < desk.x())
+        p.setX(desk.x());
+
+    if (p.y() + extrah + height() > desk.y() + desk.height())
+        p.setY(desk.y() + desk.height() - height() - extrah);
+    if (p.y() < desk.y())
+        p.setY(desk.y());
+
+    move(p);
+}
+
+
+/*!
+    \obsolete
+
+    If \a orientation is Qt::Horizontal, the extension will be displayed
+    to the right of the dialog's main area. If \a orientation is
+    Qt::Vertical, the extension will be displayed below the dialog's main
+    area.
+
+    Instead of using this functionality, we recommend that you simply call
+    show() or hide() on the part of the dialog that you want to use as an
+    extension. See the \l{Extension Example} for details.
+
+    \sa setExtension()
+*/
+void QDialog::setOrientation(Qt::Orientation orientation)
+{
+    Q_D(QDialog);
+    d->orientation = orientation;
+}
+
+/*!
+    \obsolete
+
+    Returns the dialog's extension orientation.
+
+    Instead of using this functionality, we recommend that you simply call
+    show() or hide() on the part of the dialog that you want to use as an
+    extension. See the \l{Extension Example} for details.
+
+    \sa extension()
+*/
+Qt::Orientation QDialog::orientation() const
+{
+    Q_D(const QDialog);
+    return d->orientation;
+}
+
+/*!
+    \obsolete
+
+    Sets the widget, \a extension, to be the dialog's extension,
+    deleting any previous extension. The dialog takes ownership of the
+    extension. Note that if 0 is passed any existing extension will be
+    deleted. This function must only be called while the dialog is hidden.
+
+    Instead of using this functionality, we recommend that you simply call
+    show() or hide() on the part of the dialog that you want to use as an
+    extension. See the \l{Extension Example} for details.
+
+    \sa showExtension(), setOrientation()
+*/
+void QDialog::setExtension(QWidget* extension)
+{
+    Q_D(QDialog);
+    delete d->extension;
+    d->extension = extension;
+
+    if (!extension)
+        return;
+
+    if (extension->parentWidget() != this)
+        extension->setParent(this);
+    extension->hide();
+}
+
+/*!
+    \obsolete
+
+    Returns the dialog's extension or 0 if no extension has been
+    defined.
+
+    Instead of using this functionality, we recommend that you simply call
+    show() or hide() on the part of the dialog that you want to use as an
+    extension. See the \l{Extension Example} for details.
+
+    \sa showExtension(), setOrientation()
+*/
+QWidget* QDialog::extension() const
+{
+    Q_D(const QDialog);
+    return d->extension;
+}
+
+
+/*!
+    \obsolete
+
+    If \a showIt is true, the dialog's extension is shown; otherwise the
+    extension is hidden.
+
+    Instead of using this functionality, we recommend that you simply call
+    show() or hide() on the part of the dialog that you want to use as an
+    extension. See the \l{Extension Example} for details.
+
+    \sa show(), setExtension(), setOrientation()
+*/
+void QDialog::showExtension(bool showIt)
+{
+    Q_D(QDialog);
+    d->doShowExtension = showIt;
+    if (!d->extension)
+        return;
+    if (!testAttribute(Qt::WA_WState_Visible))
+        return;
+    if (d->extension->isVisible() == showIt)
+        return;
+
+    if (showIt) {
+        d->size = size();
+        d->min = minimumSize();
+        d->max = maximumSize();
+        if (layout())
+            layout()->setEnabled(false);
+        QSize s(d->extension->sizeHint()
+                 .expandedTo(d->extension->minimumSize())
+                 .boundedTo(d->extension->maximumSize()));
+        if (d->orientation == Qt::Horizontal) {
+            int h = qMax(height(), s.height());
+            d->extension->setGeometry(width(), 0, s.width(), h);
+            setFixedSize(width() + s.width(), h);
+        } else {
+            int w = qMax(width(), s.width());
+            d->extension->setGeometry(0, height(), w, s.height());
+            setFixedSize(w, height() + s.height());
+        }
+        d->extension->show();
+#ifndef QT_NO_SIZEGRIP
+        const bool sizeGripEnabled = isSizeGripEnabled();
+        setSizeGripEnabled(false);
+        d->sizeGripEnabled = sizeGripEnabled;
+#endif
+    } else {
+        d->extension->hide();
+        // workaround for CDE window manager that won't shrink with (-1,-1)
+        setMinimumSize(d->min.expandedTo(QSize(1, 1)));
+        setMaximumSize(d->max);
+        resize(d->size);
+        if (layout())
+            layout()->setEnabled(true);
+#ifndef QT_NO_SIZEGRIP
+        setSizeGripEnabled(d->sizeGripEnabled);
+#endif
+    }
+}
+
+
+/*! \reimp */
+QSize QDialog::sizeHint() const
+{
+    Q_D(const QDialog);
+    if (d->extension) {
+        if (d->orientation == Qt::Horizontal)
+            return QSize(QWidget::sizeHint().width(),
+                        qMax(QWidget::sizeHint().height(),d->extension->sizeHint().height()));
+        else
+            return QSize(qMax(QWidget::sizeHint().width(), d->extension->sizeHint().width()),
+                        QWidget::sizeHint().height());
+    }
+
+    return QWidget::sizeHint();
+}
+
+
+/*! \reimp */
+QSize QDialog::minimumSizeHint() const
+{
+    Q_D(const QDialog);
+    if (d->extension) {
+        if (d->orientation == Qt::Horizontal)
+            return QSize(QWidget::minimumSizeHint().width(),
+                        qMax(QWidget::minimumSizeHint().height(), d->extension->minimumSizeHint().height()));
+        else
+            return QSize(qMax(QWidget::minimumSizeHint().width(), d->extension->minimumSizeHint().width()),
+                        QWidget::minimumSizeHint().height());
+    }
+
+    return QWidget::minimumSizeHint();
+}
+
+/*!
+    \property QDialog::modal
+    \brief whether show() should pop up the dialog as modal or modeless
+
+    By default, this property is false and show() pops up the dialog
+    as modeless. Setting his property to true is equivalent to setting
+    QWidget::windowModality to Qt::ApplicationModal.
+
+    exec() ignores the value of this property and always pops up the
+    dialog as modal.
+
+    \sa QWidget::windowModality, show(), exec()
+*/
+
+void QDialog::setModal(bool modal)
+{
+    setAttribute(Qt::WA_ShowModal, modal);
+}
+
+
+bool QDialog::isSizeGripEnabled() const
+{
+#ifndef QT_NO_SIZEGRIP
+    Q_D(const QDialog);
+    return !!d->resizer;
+#else
+    return false;
+#endif
+}
+
+
+void QDialog::setSizeGripEnabled(bool enabled)
+{
+#ifdef QT_NO_SIZEGRIP
+    Q_UNUSED(enabled);
+#else
+    Q_D(QDialog);
+#ifndef QT_NO_SIZEGRIP
+    d->sizeGripEnabled = enabled;
+    if (enabled && d->doShowExtension)
+        return;
+#endif
+    if (!enabled != !d->resizer) {
+        if (enabled) {
+            d->resizer = new QSizeGrip(this);
+            // adjustSize() processes all events, which is suboptimal
+            d->resizer->resize(d->resizer->sizeHint());
+            if (isRightToLeft())
+                d->resizer->move(rect().bottomLeft() -d->resizer->rect().bottomLeft());
+            else
+                d->resizer->move(rect().bottomRight() -d->resizer->rect().bottomRight());
+            d->resizer->raise();
+            d->resizer->show();
+        } else {
+            delete d->resizer;
+            d->resizer = 0;
+        }
+    }
+#endif //QT_NO_SIZEGRIP
+}
+
+
+
+/*! \reimp */
+void QDialog::resizeEvent(QResizeEvent *)
+{
+#ifndef QT_NO_SIZEGRIP
+    Q_D(QDialog);
+    if (d->resizer) {
+        if (isRightToLeft())
+            d->resizer->move(rect().bottomLeft() -d->resizer->rect().bottomLeft());
+        else
+            d->resizer->move(rect().bottomRight() -d->resizer->rect().bottomRight());
+        d->resizer->raise();
+    }
+#endif
+}
+
+/*! \fn void QDialog::finished(int result)
+    \since 4.1
+
+    This signal is emitted when the dialog's \a result code has been
+    set, either by the user or by calling done(), accept(), or
+    reject().
+
+    Note that this signal is \e not emitted when hiding the dialog
+    with hide() or setVisible(false). This includes deleting the
+    dialog while it is visible.
+
+    \sa accepted(), rejected()
+*/
+
+/*! \fn void QDialog::accepted()
+    \since 4.1
+
+    This signal is emitted when the dialog has been accepted either by
+    the user or by calling accept() or done() with the
+    QDialog::Accepted argument.
+
+    Note that this signal is \e not emitted when hiding the dialog
+    with hide() or setVisible(false). This includes deleting the
+    dialog while it is visible.
+
+    \sa finished(), rejected()
+*/
+
+/*! \fn void QDialog::rejected()
+    \since 4.1
+
+    This signal is emitted when the dialog has been rejected either by
+    the user or by calling reject() or done() with the
+    QDialog::Rejected argument.
+
+    Note that this signal is \e not emitted when hiding the dialog
+    with hide() or setVisible(false). This includes deleting the
+    dialog while it is visible.
+
+    \sa finished(), accepted()
+*/
+
+QT_END_NAMESPACE
+#include "moc_qdialog.cpp"