text: /****************************************************************************
  **
  ** 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.
  **
  ** $QT_BEGIN_LICENSE:LGPL$
  ** GNU Lesser General Public License Usage
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  ** 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:
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  ** rights. These rights are described in the Nokia Qt LGPL Exception
  ** version 1.1, 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.
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  ** Alternatively, this file may be used in accordance with the terms and
  ** conditions contained in a signed written agreement between you and Nokia.
  **
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  ****************************************************************************/
  
  #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_WS_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"
  #elif defined(Q_OS_SYMBIAN)
  #   include "qfiledialog.h"
  #   include "qfontdialog.h"
  #   include "qwizard.h"
  #   include "private/qt_s60_p.h"
  #endif
  
  #if defined(Q_WS_S60)
  #include <AknUtils.h>               // AknLayoutUtils
  #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 dialog-classes
      \ingroup abstractwidgets
  
  
      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 | ((f & Qt::WindowType_Mask) == 0 ? Qt::Dialog : Qt::WindowType(0)))
  {
  #ifdef Q_WS_WINCE
      if (!qt_wince_is_smartphone())
          setWindowFlags(windowFlags() | Qt::WindowOkButtonHint | QFlag(qt_wince_is_mobile() ? 0 : Qt::WindowCancelButtonHint));
  #endif
  
  #ifdef Q_WS_S60
      if (S60->avkonComponentsSupportTransparency) {
          bool noSystemBackground = testAttribute(Qt::WA_NoSystemBackground);
          setAttribute(Qt::WA_TranslucentBackground); // also sets WA_NoSystemBackground
          setAttribute(Qt::WA_NoSystemBackground, noSystemBackground); // restore system background attribute
      }
  #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 : Qt::WindowType(0))
                | QFlag((f & Qt::WindowType_Mask) == 0 ? Qt::Dialog : Qt::WindowType(0))
          )
  {
      setObjectName(QString::fromAscii(name));
  }
  #endif
  
  /*!
    \overload
    \internal
  */
  QDialog::QDialog(QDialogPrivate &dd, QWidget *parent, Qt::WindowFlags f)
      : QWidget(dd, parent, f | ((f & Qt::WindowType_Mask) == 0 ? Qt::Dialog : Qt::WindowType(0)))
  {
  #ifdef Q_WS_WINCE
      if (!qt_wince_is_smartphone())
          setWindowFlags(windowFlags() | Qt::WindowOkButtonHint | QFlag(qt_wince_is_mobile() ? 0 : Qt::WindowCancelButtonHint));
  #endif
  
  #ifdef Q_WS_S60
      if (S60->avkonComponentsSupportTransparency) {
          bool noSystemBackground = testAttribute(Qt::WA_NoSystemBackground);
          setAttribute(Qt::WA_TranslucentBackground); // also sets WA_NoSystemBackground
          setAttribute(Qt::WA_NoSystemBackground, noSystemBackground); // restore system background attribute
      }
  #endif
  }
  
  /*!
    Destroys the QDialog, deleting all its children.
  */
  
  QDialog::~QDialog()
  {
      QT_TRY {
          // Need to hide() here, as our (to-be) overridden hide()
          // will not be called in ~QWidget.
          hide();
      } QT_CATCH(...) {
          // we're in the destructor - just swallow the exception
      }
  }
  
  /*!
    \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 = q->findChildren<QPushButton*>();
      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 = q->findChildren<QPushButton*>();
      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;
  }
  
  #if defined(Q_WS_WINCE) || defined(Q_OS_SYMBIAN)
  #ifdef Q_WS_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);
  #ifdef Q_WS_WINCE
      if (e->type() == QEvent::OkRequest) {
          accept();
          result = true;
       }
  #elif defined(Q_WS_S60)
      if ((e->type() == QEvent::StyleChange) || (e->type() == QEvent::Resize )) {
          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);
          }
      }
      // TODO is Symbian, non-S60 behaviour required?
  #endif
      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_WS_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_WS_WINCE_WM
  
      bool showSystemDialogFullScreen = false;
  #ifdef Q_OS_SYMBIAN
      if (qobject_cast<QFileDialog *>(this) || qobject_cast<QFontDialog *>(this) ||
          qobject_cast<QWizard *>(this)) {
          showSystemDialogFullScreen = true;
      }
  #endif // Q_OS_SYMBIAN
  
      if (showSystemDialogFullScreen) {
          setWindowFlags(windowFlags() | Qt::WindowSoftkeysVisibleHint);
          setWindowState(Qt::WindowFullScreen);
      }
      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_WS_WINCE_WM
  #ifndef QT_NO_MENUBAR
      else if (menuBar)
          delete menuBar;
  #endif //QT_NO_MENUBAR
  #endif //Q_WS_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) {
          QWeakPointer<QMenu> p = new QMenu(this);
          QAction *wt = p.data()->addAction(tr("What's This?"));
          if (p.data()->exec(e->globalPos()) == wt) {
              QHelpEvent e(QEvent::WhatsThis, w->rect().center(),
                           w->mapToGlobal(w->rect().center()));
              QApplication::sendEvent(w, &e);
          }
          delete p.data();
      }
  #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 = findChildren<QPushButton*>();
              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;
          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 (SystemParametersInfo(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
  
  #ifdef Q_OS_SYMBIAN
      if (symbianAdjustedPosition())
          //dialog has already been positioned
          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);
  }
  
  #if defined(Q_OS_SYMBIAN)
  /*! \internal */
  bool QDialog::symbianAdjustedPosition()
  {
  #if defined(Q_WS_S60)
      QPoint p;
      QPoint oldPos = pos();
      if (isFullScreen()) {
          p.setX(0);
          p.setY(0);
      } else if (isMaximized()) {
          TRect statusPaneRect = TRect();
          if (S60->screenHeightInPixels > S60->screenWidthInPixels) {
              AknLayoutUtils::LayoutMetricsRect(AknLayoutUtils::EStatusPane, statusPaneRect);
          } else {
              AknLayoutUtils::LayoutMetricsRect(AknLayoutUtils::EStaconTop, statusPaneRect);
              // In some native layouts, StaCon is not used. Try to fetch the status pane
              // height from StatusPane component.
              if (statusPaneRect.IsEmpty())
                  AknLayoutUtils::LayoutMetricsRect(AknLayoutUtils::EStatusPane, statusPaneRect);
          }
  
          p.setX(0);
          p.setY(statusPaneRect.Height());
      } else {
          // naive way to deduce screen orientation
          if (S60->screenHeightInPixels > S60->screenWidthInPixels) {
              int cbaHeight;
              TRect rect;
              AknLayoutUtils::LayoutMetricsRect(AknLayoutUtils::EControlPane, rect);
              cbaHeight = rect.Height();
              p.setY(S60->screenHeightInPixels - height() - cbaHeight);
              p.setX(0);
          } else {
              const int scrollbarWidth = style()->pixelMetric(QStyle::PM_ScrollBarExtent);
              TRect staConTopRect = TRect();
              AknLayoutUtils::LayoutMetricsRect(AknLayoutUtils::EStaconTop, staConTopRect);
              if (staConTopRect.IsEmpty()) {
                  TRect cbaRect = TRect();
                  AknLayoutUtils::LayoutMetricsRect(AknLayoutUtils::EControlPane, cbaRect);
                  AknLayoutUtils::TAknCbaLocation cbaLocation = AknLayoutUtils::CbaLocation();
                  switch (cbaLocation) {
                  case AknLayoutUtils::EAknCbaLocationBottom:
                      p.setY(S60->screenHeightInPixels - height() - cbaRect.Height());
                      p.setX((S60->screenWidthInPixels - width()) >> 1);
                      break;
                  case AknLayoutUtils::EAknCbaLocationRight:
                      p.setY((S60->screenHeightInPixels - height()) >> 1);
                      p.setX(qMax(0,S60->screenWidthInPixels - width() - scrollbarWidth - cbaRect.Width()));
                      break;
                  case AknLayoutUtils::EAknCbaLocationLeft:
                      p.setY((S60->screenHeightInPixels - height()) >> 1);
                      p.setX(qMax(0,scrollbarWidth + cbaRect.Width()));
                      break;
                  }
              } else {
                  p.setY((S60->screenHeightInPixels - height()) >> 1);
                  p.setX(qMax(0,S60->screenWidthInPixels - width()));
              }
          }
      }
      if (oldPos != p || p.y() < 0)
          move(p);
      return true;
  #else
      // TODO - check positioning requirement for Symbian, non-s60
      return false;
  #endif
  }
  #endif
  
  /*!
      \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());
      }
  #if defined(Q_WS_S60)
      // if size is not fixed, try to adjust it according to S60 layoutting
      if (minimumSize() != maximumSize()) {
          // In S60, dialogs are always the width of screen (in portrait, regardless of current layout)
          return QSize(qMin(S60->screenHeightInPixels, S60->screenWidthInPixels), QWidget::sizeHint().height());
      } else {
          return QWidget::sizeHint();
      }
  #else
      return QWidget::sizeHint();
  #endif //Q_WS_S60
  }
  
  
  /*! \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"
  