source: trunk/src/gui/dialogs/qfiledialog.cpp@ 651

/****************************************************************************
**
** Copyright (C) 2010 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** 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 have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/

#include <qvariant.h>
#include <private/qwidgetitemdata_p.h>
#include "qfiledialog.h"

#ifndef QT_NO_FILEDIALOG
#include "qfiledialog_p.h"
#include <qfontmetrics.h>
#include <qaction.h>
#include <qheaderview.h>
#include <qshortcut.h>
#include <qgridlayout.h>
#include <qmenu.h>
#include <qmessagebox.h>
#include <qinputdialog.h>
#include <stdlib.h>
#include <qsettings.h>
#include <qdebug.h>
#include <qapplication.h>
#include <qstylepainter.h>
#if !defined(Q_WS_WINCE) && !defined(Q_OS_SYMBIAN)
#include "ui_qfiledialog.h"
#else
#define Q_EMBEDDED_SMALLSCREEN
#include "ui_qfiledialog_embedded.h"
#if defined(Q_OS_WINCE)
extern bool qt_priv_ptr_valid;
#endif
#endif

QT_BEGIN_NAMESPACE

Q_GLOBAL_STATIC(QString, lastVisitedDir)

/*
    \internal

    Exported hooks that can be used to customize the static functions.
 */
typedef QString (*_qt_filedialog_existing_directory_hook)(QWidget *parent, const QString &caption, const QString &dir, QFileDialog::Options options);
Q_GUI_EXPORT _qt_filedialog_existing_directory_hook qt_filedialog_existing_directory_hook = 0;

typedef QString (*_qt_filedialog_open_filename_hook)(QWidget * parent, const QString &caption, const QString &dir, const QString &filter, QString *selectedFilter, QFileDialog::Options options);
Q_GUI_EXPORT _qt_filedialog_open_filename_hook qt_filedialog_open_filename_hook = 0;

typedef QStringList (*_qt_filedialog_open_filenames_hook)(QWidget * parent, const QString &caption, const QString &dir, const QString &filter, QString *selectedFilter, QFileDialog::Options options);
Q_GUI_EXPORT _qt_filedialog_open_filenames_hook qt_filedialog_open_filenames_hook = 0;

typedef QString (*_qt_filedialog_save_filename_hook)(QWidget * parent, const QString &caption, const QString &dir, const QString &filter, QString *selectedFilter, QFileDialog::Options options);
Q_GUI_EXPORT _qt_filedialog_save_filename_hook qt_filedialog_save_filename_hook = 0;

/*!
  \class QFileDialog
  \brief The QFileDialog class provides a dialog that allow users to select files or directories.
  \ingroup standard-dialogs


  The QFileDialog class enables a user to traverse the file system in
  order to select one or many files or a directory.

  The easiest way to create a QFileDialog is to use the static
  functions. On Windows, Mac OS X, KDE and GNOME, these static functions will
  call the native file dialog when possible.

  \snippet doc/src/snippets/code/src_gui_dialogs_qfiledialog.cpp 0

  In the above example, a modal QFileDialog is created using a static
  function. The dialog initially displays the contents of the "/home/jana"
  directory, and displays files matching the patterns given in the
  string "Image Files (*.png *.jpg *.bmp)". The parent of the file dialog
  is set to \e this, and the window title is set to "Open Image".

  If you want to use multiple filters, separate each one with
  \e two semicolons. For example:

  \snippet doc/src/snippets/code/src_gui_dialogs_qfiledialog.cpp 1

  You can create your own QFileDialog without using the static
  functions. By calling setFileMode(), you can specify what the user must
  select in the dialog:

  \snippet doc/src/snippets/code/src_gui_dialogs_qfiledialog.cpp 2

  In the above example, the mode of the file dialog is set to
  AnyFile, meaning that the user can select any file, or even specify a
  file that doesn't exist. This mode is useful for creating a
  "Save As" file dialog. Use ExistingFile if the user must select an
  existing file, or \l Directory if only a directory may be selected.
  See the \l QFileDialog::FileMode enum for the complete list of modes.

  The fileMode property contains the mode of operation for the dialog;
  this indicates what types of objects the user is expected to select.
  Use setNameFilter() to set the dialog's file filter. For example:

  \snippet doc/src/snippets/code/src_gui_dialogs_qfiledialog.cpp 3

  In the above example, the filter is set to \c{"Images (*.png *.xpm *.jpg)"},
  this means that only files with the extension \c png, \c xpm,
  or \c jpg will be shown in the QFileDialog. You can apply
  several filters by using setNameFilters(). Use selectNameFilter() to select
  one of the filters you've given as the file dialog's default filter.

  The file dialog has two view modes: \l{QFileDialog::}{List} and
  \l{QFileDialog::}{Detail}.
  \l{QFileDialog::}{List} presents the contents of the current directory
  as a list of file and directory names. \l{QFileDialog::}{Detail} also
  displays a list of file and directory names, but provides additional
  information alongside each name, such as the file size and modification
  date. Set the mode with setViewMode():

  \snippet doc/src/snippets/code/src_gui_dialogs_qfiledialog.cpp 4

  The last important function you will need to use when creating your
  own file dialog is selectedFiles().

  \snippet doc/src/snippets/code/src_gui_dialogs_qfiledialog.cpp 5

  In the above example, a modal file dialog is created and shown. If
  the user clicked OK, the file they selected is put in \c fileName.

  The dialog's working directory can be set with setDirectory().
  Each file in the current directory can be selected using
  the selectFile() function.

  The \l{dialogs/standarddialogs}{Standard Dialogs} example shows
  how to use QFileDialog as well as other built-in Qt dialogs.

  \sa QDir, QFileInfo, QFile, QPrintDialog, QColorDialog, QFontDialog, {Standard Dialogs Example},
      {Application Example}
*/

/*!
    \enum QFileDialog::AcceptMode

    \value AcceptOpen
    \value AcceptSave
*/

/*!
    \enum QFileDialog::ViewMode

    This enum describes the view mode of the file dialog; i.e. what
    information about each file will be displayed.

    \value Detail Displays an icon, a name, and details for each item in
                  the directory.
    \value List   Displays only an icon and a name for each item in the
                  directory.

    \sa setViewMode()
*/

/*!
    \enum QFileDialog::FileMode

    This enum is used to indicate what the user may select in the file
    dialog; i.e. what the dialog will return if the user clicks OK.

    \value AnyFile        The name of a file, whether it exists or not.
    \value ExistingFile   The name of a single existing file.
    \value Directory      The name of a directory. Both files and
                          directories are displayed.
    \value ExistingFiles  The names of zero or more existing files.

    This value is obsolete since Qt 4.5:

    \value DirectoryOnly  Use \c Directory and setOption(ShowDirsOnly, true) instead.

    \sa setFileMode()
*/

/*!
    \enum QFileDialog::Option

    \value ShowDirsOnly Only show directories in the file dialog. By
    default both files and directories are shown. (Valid only in the
    \l Directory file mode.)

    \value DontResolveSymlinks Don't resolve symlinks in the file
    dialog. By default symlinks are resolved.

    \value DontConfirmOverwrite Don't ask for confirmation if an
    existing file is selected.  By default confirmation is requested.

    \value DontUseNativeDialog Don't use the native file dialog. By
    default, the native file dialog is used unless you use a subclass
    of QFileDialog that contains the Q_OBJECT macro.

    \value ReadOnly Indicates that the model is readonly.

    \value HideNameFilterDetails Indicates if the is hidden or not.
    This value is obsolete and does nothing since Qt 4.5:

    \value DontUseSheet In previous versions of Qt, the static
    functions would create a sheet by default if the static function
    was given a parent. This is no longer supported in Qt 4.5, The
    static functions will always be an application modal dialog. If
    you want to use sheets, use QFileDialog::open() instead.

*/

/*!
  \enum QFileDialog::DialogLabel

  \value LookIn
  \value FileName
  \value FileType
  \value Accept
  \value Reject
*/

/*!
    \fn void QFileDialog::filesSelected(const QStringList &selected)

    When the selection changes and the dialog is accepted, this signal is
    emitted with the (possibly empty) list of \a selected files.

    \sa currentChanged(), QDialog::Accepted
*/


/*!
    \fn void QFileDialog::fileSelected(const QString &file)

    When the selection changes and the dialog is accepted, this signal is
    emitted with the (possibly empty) selected \a file.

    \sa currentChanged(), QDialog::Accepted
*/


/*!
    \fn void QFileDialog::currentChanged(const QString &path)

    When the current file changes, this signal is emitted with the
    new file name as the \a path parameter.

    \sa filesSelected()
*/

/*!
  \fn void QFileDialog::directoryEntered(const QString &directory)
  \since 4.3

  This signal is emitted when the user enters a \a directory.
*/

/*!
  \fn void QFileDialog::filterSelected(const QString &filter)
  \since 4.3

  This signal is emitted when the user selects a \a filter.
*/

#if defined(Q_WS_WIN) || defined(Q_WS_MAC)
bool Q_GUI_EXPORT qt_use_native_dialogs = true; // for the benefit of testing tools, until we have a proper API
#endif

QT_BEGIN_INCLUDE_NAMESPACE
#ifdef Q_WS_WIN
#include <qwindowsstyle.h>
#endif
#include <qshortcut.h>
#ifdef Q_WS_MAC
#include <private/qunicodetables_p.h>
#include <qmacstyle_mac.h>
#endif
QT_END_INCLUDE_NAMESPACE

/*!
    \fn QFileDialog::QFileDialog(QWidget *parent, Qt::WindowFlags flags)

    Constructs a file dialog with the given \a parent and widget \a flags.
*/
QFileDialog::QFileDialog(QWidget *parent, Qt::WindowFlags f)
    : QDialog(*new QFileDialogPrivate, parent, f)
{
    Q_D(QFileDialog);
    d->init();
    d->lineEdit()->selectAll();
}

/*!
    Constructs a file dialog with the given \a parent and \a caption that
    initially displays the contents of the specified \a directory.
    The contents of the directory are filtered before being shown in the
    dialog, using a semicolon-separated list of filters specified by
    \a filter.
*/
QFileDialog::QFileDialog(QWidget *parent,
                     const QString &caption,
                     const QString &directory,
                     const QString &filter)
    : QDialog(*new QFileDialogPrivate, parent, 0)
{
    Q_D(QFileDialog);
    d->init(directory, filter, caption);
    d->lineEdit()->selectAll();
}

/*!
    \internal
*/
QFileDialog::QFileDialog(const QFileDialogArgs &args)
    : QDialog(*new QFileDialogPrivate, args.parent, 0)
{
    Q_D(QFileDialog);
    d->init(args.directory, args.filter, args.caption);
    setFileMode(args.mode);
    setOptions(args.options);
    selectFile(args.selection);
    d->lineEdit()->selectAll();
}

/*!
    Destroys the file dialog.
*/
QFileDialog::~QFileDialog()
{
    Q_D(QFileDialog);
#ifndef QT_NO_SETTINGS
    QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));
    settings.beginGroup(QLatin1String("Qt"));
    settings.setValue(QLatin1String("filedialog"), saveState());
#endif
    d->deleteNativeDialog_sys();
}

/*!
    \since 4.3
    Sets the \a urls that are located in the sidebar.

    For instance:

    \snippet doc/src/snippets/filedialogurls.cpp 0

    The file dialog will then look like this:

    \image filedialogurls.png

    \sa sidebarUrls()
*/
void QFileDialog::setSidebarUrls(const QList<QUrl> &urls)
{
    Q_D(QFileDialog);
    d->qFileDialogUi->sidebar->setUrls(urls);
}

/*!
    \since 4.3
    Returns a list of urls that are currently in the sidebar
*/
QList<QUrl> QFileDialog::sidebarUrls() const
{
    Q_D(const QFileDialog);
    return d->qFileDialogUi->sidebar->urls();
}

static const qint32 QFileDialogMagic = 0xbe;

const char *qt_file_dialog_filter_reg_exp =
"^(.*)\\(([a-zA-Z0-9_.*? +;#\\-\\[\\]@\\{\\}/!<>\\$%&=^~:\\|]*)\\)$";

/*!
    \since 4.3
    Saves the state of the dialog's layout, history and current directory.

    Typically this is used in conjunction with QSettings to remember the size
    for a future session. A version number is stored as part of the data.
*/
QByteArray QFileDialog::saveState() const
{
    Q_D(const QFileDialog);
    int version = 3;
    QByteArray data;
    QDataStream stream(&data, QIODevice::WriteOnly);

    stream << qint32(QFileDialogMagic);
    stream << qint32(version);
    stream << d->qFileDialogUi->splitter->saveState();
    stream << d->qFileDialogUi->sidebar->urls();
    stream << history();
    stream << *lastVisitedDir();
    stream << d->qFileDialogUi->treeView->header()->saveState();
    stream << qint32(viewMode());
    return data;
}

/*!
    \since 4.3
    Restores the dialogs's layout, history and current directory to the \a state specified.

    Typically this is used in conjunction with QSettings to restore the size
    from a past session.

    Returns false if there are errors
*/
bool QFileDialog::restoreState(const QByteArray &state)
{
    Q_D(QFileDialog);
    int version = 3;
    QByteArray sd = state;
    QDataStream stream(&sd, QIODevice::ReadOnly);
    if (stream.atEnd())
        return false;
    QByteArray splitterState;
    QByteArray headerData;
    QList<QUrl> bookmarks;
    QStringList history;
    QString currentDirectory;
    qint32 marker;
    qint32 v;
    qint32 viewMode;
    stream >> marker;
    stream >> v;
    if (marker != QFileDialogMagic || v != version)
        return false;

    stream >> splitterState
           >> bookmarks
           >> history
           >> currentDirectory
           >> headerData
           >> viewMode;

    if (!d->qFileDialogUi->splitter->restoreState(splitterState))
        return false;
    QList<int> list = d->qFileDialogUi->splitter->sizes();
    if (list.count() >= 2 && list.at(0) == 0 && list.at(1) == 0) {
        for (int i = 0; i < list.count(); ++i)
            list[i] = d->qFileDialogUi->splitter->widget(i)->sizeHint().width();
        d->qFileDialogUi->splitter->setSizes(list);
    }

    d->qFileDialogUi->sidebar->setUrls(bookmarks);
    while (history.count() > 5)
        history.pop_front();
    setHistory(history);
    setDirectory(lastVisitedDir()->isEmpty() ? currentDirectory : *lastVisitedDir());
    if (!d->qFileDialogUi->treeView->header()->restoreState(headerData))
        return false;

    setViewMode(ViewMode(viewMode));
    return true;
}

/*!
    \reimp
*/
void QFileDialog::changeEvent(QEvent *e)
{
    Q_D(QFileDialog);
    if (e->type() == QEvent::LanguageChange) {
        d->retranslateWindowTitle();
        d->retranslateStrings();
    }
    QDialog::changeEvent(e);
}

QFileDialogPrivate::QFileDialogPrivate()
    :
#ifndef QT_NO_PROXYMODEL
        proxyModel(0),
#endif
        model(0),
        fileMode(QFileDialog::AnyFile),
        acceptMode(QFileDialog::AcceptOpen),
        currentHistoryLocation(-1),
        renameAction(0),
        deleteAction(0),
        showHiddenAction(0),
        useDefaultCaption(true),
        defaultFileTypes(true),
        fileNameLabelExplicitlySat(false),
        nativeDialogInUse(false),
#ifdef Q_WS_MAC
        mDelegate(0),
#ifndef QT_MAC_USE_COCOA
        mDialog(0),
        mDialogStarted(false),
        mDialogClosed(true),
#endif
#endif
        qFileDialogUi(0)
{
}

QFileDialogPrivate::~QFileDialogPrivate()
{
}

void QFileDialogPrivate::retranslateWindowTitle()
{
    Q_Q(QFileDialog);
    if (!useDefaultCaption || setWindowTitle != q->windowTitle())
        return;
    if (acceptMode == QFileDialog::AcceptOpen) {
        if (fileMode == QFileDialog::DirectoryOnly || fileMode == QFileDialog::Directory)
            q->setWindowTitle(QFileDialog::tr("Find Directory"));
        else
            q->setWindowTitle(QFileDialog::tr("Open"));
    } else
        q->setWindowTitle(QFileDialog::tr("Save As"));

    setWindowTitle = q->windowTitle();
}

void QFileDialogPrivate::setLastVisitedDirectory(const QString &dir)
{
    *lastVisitedDir() = dir;
}

void QFileDialogPrivate::retranslateStrings()
{
    Q_Q(QFileDialog);
    /* WIDGETS */
    if (defaultFileTypes)
        q->setNameFilter(QFileDialog::tr("All Files (*)"));

    QList<QAction*> actions = qFileDialogUi->treeView->header()->actions();
    QAbstractItemModel *abstractModel = model;
#ifndef QT_NO_PROXYMODEL
    if (proxyModel)
        abstractModel = proxyModel;
#endif
    int total = qMin(abstractModel->columnCount(QModelIndex()), actions.count() + 1);
    for (int i = 1; i < total; ++i) {
        actions.at(i - 1)->setText(QFileDialog::tr("Show ") + abstractModel->headerData(i, Qt::Horizontal, Qt::DisplayRole).toString());
    }

    /* MENU ACTIONS */
    renameAction->setText(QFileDialog::tr("&Rename"));
    deleteAction->setText(QFileDialog::tr("&Delete"));
    showHiddenAction->setText(QFileDialog::tr("Show &hidden files"));
    newFolderAction->setText(QFileDialog::tr("&New Folder"));
    qFileDialogUi->retranslateUi(q);

    if (!fileNameLabelExplicitlySat){
        if (fileMode == QFileDialog::DirectoryOnly || fileMode == QFileDialog::Directory) {
            q->setLabelText(QFileDialog::FileName, QFileDialog::tr("Directory:"));
        } else {
            q->setLabelText(QFileDialog::FileName, QFileDialog::tr("File &name:"));
        }
        fileNameLabelExplicitlySat = false;
    }
}

void QFileDialogPrivate::emitFilesSelected(const QStringList &files)
{
    Q_Q(QFileDialog);
    emit q->filesSelected(files);
    if (files.count() == 1)
        emit q->fileSelected(files.first());
}

bool QFileDialogPrivate::canBeNativeDialog()
{
    Q_Q(QFileDialog);
    if (nativeDialogInUse)
        return true;
    if (q->testAttribute(Qt::WA_DontShowOnScreen))
        return false;
    if (opts & QFileDialog::DontUseNativeDialog)
        return false;

    QLatin1String staticName(QFileDialog::staticMetaObject.className());
    QLatin1String dynamicName(q->metaObject()->className());
    return (staticName == dynamicName);
}

/*!
    \since 4.5
    Sets the given \a option to be enabled if \a on is true; otherwise,
    clears the given \a option.

    \sa options, testOption()
*/
void QFileDialog::setOption(Option option, bool on)
{
    Q_D(QFileDialog);
    if (!(d->opts & option) != !on)
        setOptions(d->opts ^ option);
}

/*!
    \since 4.5

    Returns true if the given \a option is enabled; otherwise, returns
    false.

    \sa options, setOption()
*/
bool QFileDialog::testOption(Option option) const
{
    Q_D(const QFileDialog);
    return (d->opts & option) != 0;
}

/*!
    \property QFileDialog::options
    \brief the various options that affect the look and feel of the dialog
    \since 4.5

    By default, all options are disabled.

    Options should be set before showing the dialog. Setting them while the
    dialog is visible is not guaranteed to have an immediate effect on the
    dialog (depending on the option and on the platform).

    \sa setOption(), testOption()
*/
void QFileDialog::setOptions(Options options)
{
    Q_D(QFileDialog);

    Options changed = (options ^ d->opts);
    if (!changed)
        return;

    d->opts = options;
    if (changed & DontResolveSymlinks)
        d->model->setResolveSymlinks(!(options & DontResolveSymlinks));
    if (changed & ReadOnly) {
        bool ro = (options & ReadOnly);
        d->model->setReadOnly(ro);
        d->qFileDialogUi->newFolderButton->setEnabled(!ro);
        d->renameAction->setEnabled(!ro);
        d->deleteAction->setEnabled(!ro);
    }
    if (changed & HideNameFilterDetails)
        setNameFilters(d->nameFilters);

    if (changed & ShowDirsOnly)
        setFilter((options & ShowDirsOnly) ? filter() & ~QDir::Files : filter() | QDir::Files);
}

QFileDialog::Options QFileDialog::options() const
{
    Q_D(const QFileDialog);
    return d->opts;
}

/*!
    \overload

    \since 4.5

    This function connects one of its signals to the slot specified by \a receiver
    and \a member. The specific signal depends is filesSelected() if fileMode is
    ExistingFiles and fileSelected() if fileMode is anything else.

    The signal will be disconnected from the slot when the dialog is closed.
*/
void QFileDialog::open(QObject *receiver, const char *member)
{
    Q_D(QFileDialog);
    const char *signal = (fileMode() == ExistingFiles) ? SIGNAL(filesSelected(QStringList))
                                                       : SIGNAL(fileSelected(QString));
    connect(this, signal, receiver, member);
    d->signalToDisconnectOnClose = signal;
    d->receiverToDisconnectOnClose = receiver;
    d->memberToDisconnectOnClose = member;

    QDialog::open();
}


/*!
    \reimp
*/
void QFileDialog::setVisible(bool visible)
{
    Q_D(QFileDialog);
    if (visible){
        if (testAttribute(Qt::WA_WState_ExplicitShowHide) && !testAttribute(Qt::WA_WState_Hidden))
            return;
    } else if (testAttribute(Qt::WA_WState_ExplicitShowHide) && testAttribute(Qt::WA_WState_Hidden))
        return;

    if (d->canBeNativeDialog()){
        if (d->setVisible_sys(visible)){
            d->nativeDialogInUse = true;
            // Set WA_DontShowOnScreen so that QDialog::setVisible(visible) below
            // updates the state correctly, but skips showing the non-native version:
            setAttribute(Qt::WA_DontShowOnScreen);
        } else {
            d->nativeDialogInUse = false;
            setAttribute(Qt::WA_DontShowOnScreen, false);
        }
    }

    if (!d->nativeDialogInUse)
        d->qFileDialogUi->fileNameEdit->setFocus();

    QDialog::setVisible(visible);
}

/*!
    \internal
    set the directory to url
*/
void QFileDialogPrivate::_q_goToUrl(const QUrl &url)
{
    //The shortcut in the side bar may have a parent that is not fetched yet (e.g. an hidden file)
    //so we force the fetching
    QFileSystemModelPrivate::QFileSystemNode *node = model->d_func()->node(url.toLocalFile(), true);
    QModelIndex idx =  model->d_func()->index(node);
    _q_enterDirectory(idx);
}

/*!
    \fn void QFileDialog::setDirectory(const QDir &directory)

    \overload
*/

/*!
    Sets the file dialog's current \a directory.
*/
void QFileDialog::setDirectory(const QString &directory)
{
    Q_D(QFileDialog);
    QString newDirectory = directory;
    QFileInfo info(directory);
    //we remove .. and . from the given path if exist
    if (!directory.isEmpty())
        newDirectory = QDir::cleanPath(directory);

    if (!directory.isEmpty() && newDirectory.isEmpty())
        return;

    d->setLastVisitedDirectory(newDirectory);

    if (d->nativeDialogInUse){
        d->setDirectory_sys(newDirectory);
        return;
    }
    if (d->rootPath() == newDirectory)
        return;
    QModelIndex root = d->model->setRootPath(newDirectory);
    d->qFileDialogUi->newFolderButton->setEnabled(d->model->flags(root) & Qt::ItemIsDropEnabled);
    if (root != d->rootIndex()) {
#ifndef QT_NO_FSCOMPLETER
    if (directory.endsWith(QLatin1Char('/')))
        d->completer->setCompletionPrefix(newDirectory);
    else
        d->completer->setCompletionPrefix(newDirectory + QLatin1Char('/'));
#endif
        d->setRootIndex(root);
    }
    d->qFileDialogUi->listView->selectionModel()->clear();
}

/*!
    Returns the directory currently being displayed in the dialog.
*/
QDir QFileDialog::directory() const
{
    Q_D(const QFileDialog);
    return QDir(d->nativeDialogInUse ? d->directory_sys() : d->rootPath());
}

/*!
    Selects the given \a filename in the file dialog.

    \sa selectedFiles()
*/
void QFileDialog::selectFile(const QString &filename)
{
    Q_D(QFileDialog);
    if (filename.isEmpty())
        return;

    if (d->nativeDialogInUse){
        d->selectFile_sys(filename);
        return;
    }

    if (!QDir::isRelativePath(filename)) {
        QFileInfo info(filename);
        QString filenamePath = info.absoluteDir().path();

        if (d->model->rootPath() != filenamePath)
            setDirectory(filenamePath);
    }

    QModelIndex index = d->model->index(filename);
    QString file;
    if (!index.isValid()) {
        // save as dialog where we want to input a default value
        QString text = filename;
        if (QFileInfo(filename).isAbsolute()) {
            QString current = d->rootPath();
            text.remove(current);
            if (text.at(0) == QDir::separator()
#if defined(Q_OS_WIN) || defined(Q_OS_OS2)
                //On Windows and OS/2 both cases can happen
                || text.at(0) == QLatin1Char('/')
#endif
                )
                text = text.remove(0,1);
        }
        file = text;
    } else {
        file = index.data().toString();
    }
    d->qFileDialogUi->listView->selectionModel()->clear();
    if (!isVisible() || !d->lineEdit()->hasFocus())
        d->lineEdit()->setText(file);
}

/**
    Returns the text in the line edit which can be one or more file names
  */
QStringList QFileDialogPrivate::typedFiles() const
{
    QStringList files;
    QString editText = lineEdit()->text();
    if (!editText.contains(QLatin1Char('"')))
        files << editText;
    else {
        // " is used to separate files like so: "file1" "file2" "file3" ...
        // ### need escape character for filenames with quotes (")
        QStringList tokens = editText.split(QLatin1Char('\"'));
        for (int i=0; i<tokens.size(); ++i) {
            if ((i % 2) == 0)
                continue; // Every even token is a separator
            files << toInternal(tokens.at(i));
        }
    }
    return addDefaultSuffixToFiles(files);
}

QStringList QFileDialogPrivate::addDefaultSuffixToFiles(const QStringList filesToFix) const
{
    QStringList files;
    for (int i=0; i<filesToFix.size(); ++i) {
        QString name = toInternal(filesToFix.at(i));
        QFileInfo info(name);
        // if the filename has no suffix, add the default suffix
        if (!defaultSuffix.isEmpty() && !info.isDir() && name.lastIndexOf(QLatin1Char('.')) == -1)
            name += QLatin1Char('.') + defaultSuffix;
        if (info.isAbsolute()) {
            files.append(name);
        } else {
            // at this point the path should only have Qt path separators.
            // This check is needed since we might be at the root directory
            // and on Windows it already ends with slash.
            QString path = rootPath();
            if (!path.endsWith(QLatin1Char('/')))
                path += QLatin1Char('/');
            path += name;
            files.append(path);
        }
    }
    return files;
}


/*!
    Returns a list of strings containing the absolute paths of the
    selected files in the dialog. If no files are selected, or
    the mode is not ExistingFiles or ExistingFile, selectedFiles() contains the current path in the viewport.

    \sa selectedNameFilter(), selectFile()
*/
QStringList QFileDialog::selectedFiles() const
{
    Q_D(const QFileDialog);
    if (d->nativeDialogInUse)
        return d->addDefaultSuffixToFiles(d->selectedFiles_sys());

    QModelIndexList indexes = d->qFileDialogUi->listView->selectionModel()->selectedRows();
    QStringList files;
    for (int i = 0; i < indexes.count(); ++i)
        files.append(indexes.at(i).data(QFileSystemModel::FilePathRole).toString());

    if (files.isEmpty() && !d->lineEdit()->text().isEmpty())
        files = d->typedFiles();

    if (files.isEmpty() && !(d->fileMode == ExistingFile || d->fileMode == ExistingFiles))
        files.append(d->rootIndex().data(QFileSystemModel::FilePathRole).toString());
    return files;
}

/*
    Makes a list of filters from ;;-separated text.
    Used by the mac and windows implementations
*/
QStringList qt_make_filter_list(const QString &filter)
{
    QString f(filter);

    if (f.isEmpty())
        return QStringList();

    QString sep(QLatin1String(";;"));
    int i = f.indexOf(sep, 0);
    if (i == -1) {
        if (f.indexOf(QLatin1Char('\n'), 0) != -1) {
            sep = QLatin1Char('\n');
            i = f.indexOf(sep, 0);
        }
    }

    return f.split(sep);
}

/*!
    \since 4.4

    Sets the filter used in the file dialog to the given \a filter.

    If \a filter contains a pair of parentheses containing one or more
    of \bold{anything*something}, separated by spaces, then only the
    text contained in the parentheses is used as the filter. This means
    that these calls are all equivalent:

    \snippet doc/src/snippets/code/src_gui_dialogs_qfiledialog.cpp 6

    \sa setNameFilters()
*/
void QFileDialog::setNameFilter(const QString &filter)
{
    setNameFilters(qt_make_filter_list(filter));
}

/*!
  \obsolete

  Use setNameFilter() instead.
*/
void QFileDialog::setFilter(const QString &filter)
{
    setNameFilter(filter);
}

/*!
    \property QFileDialog::nameFilterDetailsVisible
    \obsolete
    \brief This property holds whether the filter details is shown or not.
    \since 4.4

    When this property is true (the default), the filter details are shown
    in the combo box.  When the property is set to false, these are hidden.

    Use setOption(HideNameFilterDetails, !\e enabled) or
    !testOption(HideNameFilterDetails).
*/
void QFileDialog::setNameFilterDetailsVisible(bool enabled)
{
    setOption(HideNameFilterDetails, !enabled);
}

bool QFileDialog::isNameFilterDetailsVisible() const
{
    return !testOption(HideNameFilterDetails);
}


/*
    Strip the filters by removing the details, e.g. (*.*).
*/
QStringList qt_strip_filters(const QStringList &filters)
{
    QStringList strippedFilters;
    QRegExp r(QString::fromLatin1(qt_file_dialog_filter_reg_exp));
    for (int i = 0; i < filters.count(); ++i) {
        QString filterName;
        int index = r.indexIn(filters[i]);
        if (index >= 0)
            filterName = r.cap(1);
        strippedFilters.append(filterName.simplified());
    }
    return strippedFilters;
}


/*!
    \since 4.4

    Sets the \a filters used in the file dialog.

    \snippet doc/src/snippets/code/src_gui_dialogs_qfiledialog.cpp 7
*/
void QFileDialog::setNameFilters(const QStringList &filters)
{
    Q_D(QFileDialog);
    d->defaultFileTypes = (filters == QStringList(QFileDialog::tr("All Files (*)")));
    QStringList cleanedFilters;
    for (int i = 0; i < filters.count(); ++i) {
        cleanedFilters << filters[i].simplified();
    }
    d->nameFilters = cleanedFilters;

    if (d->nativeDialogInUse){
        d->setNameFilters_sys(cleanedFilters);
        return;
    }

    d->qFileDialogUi->fileTypeCombo->clear();
    if (cleanedFilters.isEmpty())
        return;

    if (testOption(HideNameFilterDetails))
        d->qFileDialogUi->fileTypeCombo->addItems(qt_strip_filters(cleanedFilters));
    else
        d->qFileDialogUi->fileTypeCombo->addItems(cleanedFilters);

    d->_q_useNameFilter(0);
}

/*!
    \obsolete

    Use setNameFilters() instead.
*/
void QFileDialog::setFilters(const QStringList &filters)
{
    setNameFilters(filters);
}

/*!
    \since 4.4

    Returns the file type filters that are in operation on this file
    dialog.
*/
QStringList QFileDialog::nameFilters() const
{
    return d_func()->nameFilters;
}

/*!
    \obsolete

    Use nameFilters() instead.
*/

QStringList QFileDialog::filters() const
{
    return nameFilters();
}

/*!
    \since 4.4

    Sets the current file type \a filter. Multiple filters can be
    passed in \a filter by separating them with semicolons or spaces.

    \sa setNameFilter(), setNameFilters(), selectedNameFilter()
*/
void QFileDialog::selectNameFilter(const QString &filter)
{
    Q_D(QFileDialog);
    if (d->nativeDialogInUse) {
        d->selectNameFilter_sys(filter);
        return;
    }
    int i;
    if (testOption(HideNameFilterDetails)) {
        i = d->qFileDialogUi->fileTypeCombo->findText(qt_strip_filters(qt_make_filter_list(filter)).first());
    } else {
        i = d->qFileDialogUi->fileTypeCombo->findText(filter);
    }
    if (i >= 0) {
        d->qFileDialogUi->fileTypeCombo->setCurrentIndex(i);
        d->_q_useNameFilter(d->qFileDialogUi->fileTypeCombo->currentIndex());
    }
}

/*!
    \obsolete

    Use selectNameFilter() instead.
*/

void QFileDialog::selectFilter(const QString &filter)
{
    selectNameFilter(filter);
}

/*!
    \since 4.4

    Returns the filter that the user selected in the file dialog.

    \sa selectedFiles()
*/
QString QFileDialog::selectedNameFilter() const
{
    Q_D(const QFileDialog);
    if (d->nativeDialogInUse)
        return d->selectedNameFilter_sys();

    return d->qFileDialogUi->fileTypeCombo->currentText();
}

/*!
    \obsolete

    Use selectedNameFilter() instead.
*/
QString QFileDialog::selectedFilter() const
{
    return selectedNameFilter();
}

/*!
    \since 4.4

    Returns the filter that is used when displaying files.

    \sa setFilter()
*/
QDir::Filters QFileDialog::filter() const
{
    Q_D(const QFileDialog);
    return d->model->filter();
}

/*!
    \since 4.4

    Sets the filter used by the model to \a filters. The filter is used
    to specify the kind of files that should be shown.

    \sa filter()
*/

void QFileDialog::setFilter(QDir::Filters filters)
{
    Q_D(QFileDialog);
    d->model->setFilter(filters);
    if (d->nativeDialogInUse){
        d->setFilter_sys();
        return;
    }

    d->showHiddenAction->setChecked((filters & QDir::Hidden));
}

/*!
    \property QFileDialog::viewMode
    \brief the way files and directories are displayed in the dialog

    By default, the \c Detail mode is used to display information about
    files and directories.

    \sa ViewMode
*/
void QFileDialog::setViewMode(QFileDialog::ViewMode mode)
{
    Q_D(QFileDialog);
    if (mode == Detail)
        d->_q_showDetailsView();
    else
        d->_q_showListView();
}

QFileDialog::ViewMode QFileDialog::viewMode() const
{
    Q_D(const QFileDialog);
    return (d->qFileDialogUi->stackedWidget->currentWidget() == d->qFileDialogUi->listView->parent() ? QFileDialog::List : QFileDialog::Detail);
}

/*!
    \property QFileDialog::fileMode
    \brief the file mode of the dialog

    The file mode defines the number and type of items that the user is
    expected to select in the dialog.

    By default, this property is set to AnyFile.

    This function will set the labels for the FileName and
    \l{QFileDialog::}{Accept} \l{DialogLabel}s. It is possible to set
    custom text after the call to setFileMode().

    \sa FileMode
*/
void QFileDialog::setFileMode(QFileDialog::FileMode mode)
{
    Q_D(QFileDialog);
    d->fileMode = mode;
    d->retranslateWindowTitle();

    // keep ShowDirsOnly option in sync with fileMode (BTW, DirectoryOnly is obsolete)
    setOption(ShowDirsOnly, mode == DirectoryOnly);

    // set selection mode and behavior
    QAbstractItemView::SelectionMode selectionMode;
    if (mode == QFileDialog::ExistingFiles)
        selectionMode = QAbstractItemView::ExtendedSelection;
    else
        selectionMode = QAbstractItemView::SingleSelection;
    d->qFileDialogUi->listView->setSelectionMode(selectionMode);
    d->qFileDialogUi->treeView->setSelectionMode(selectionMode);
    // set filter
    d->model->setFilter(d->filterForMode(filter()));
    // setup file type for directory
    QString buttonText = (d->acceptMode == AcceptOpen ? tr("&Open") : tr("&Save"));
    if (mode == DirectoryOnly || mode == Directory) {
        d->qFileDialogUi->fileTypeCombo->clear();
        d->qFileDialogUi->fileTypeCombo->addItem(tr("Directories"));
        d->qFileDialogUi->fileTypeCombo->setEnabled(false);

        if (!d->fileNameLabelExplicitlySat){
            setLabelText(FileName, tr("Directory:"));
            d->fileNameLabelExplicitlySat = false;
        }
        buttonText = tr("&Choose");
    } else {
        if (!d->fileNameLabelExplicitlySat){
            setLabelText(FileName, tr("File &name:"));
            d->fileNameLabelExplicitlySat = false;
        }
    }
    setLabelText(Accept, buttonText);
    if (d->nativeDialogInUse){
        d->setFilter_sys();
        return;
    }

    d->qFileDialogUi->fileTypeCombo->setEnabled(!testOption(ShowDirsOnly));
    d->_q_updateOkButton();
}

QFileDialog::FileMode QFileDialog::fileMode() const
{
    Q_D(const QFileDialog);
    return d->fileMode;
}

/*!
    \property QFileDialog::acceptMode
    \brief the accept mode of the dialog

    The action mode defines whether the dialog is for opening or saving files.

    By default, this property is set to \l{AcceptOpen}.

    \sa AcceptMode
*/
void QFileDialog::setAcceptMode(QFileDialog::AcceptMode mode)
{
    Q_D(QFileDialog);
    d->acceptMode = mode;
    bool directoryMode = (d->fileMode == Directory || d->fileMode == DirectoryOnly);
    QDialogButtonBox::StandardButton button = (mode == AcceptOpen ? QDialogButtonBox::Open : QDialogButtonBox::Save);
    d->qFileDialogUi->buttonBox->setStandardButtons(button | QDialogButtonBox::Cancel);
    d->qFileDialogUi->buttonBox->button(button)->setEnabled(false);
    d->_q_updateOkButton();
    if (mode == AcceptOpen && directoryMode)
        setLabelText(Accept, tr("&Choose"));
    else
        setLabelText(Accept, (mode == AcceptOpen ? tr("&Open") : tr("&Save")));
    if (mode == AcceptSave) {
        d->qFileDialogUi->lookInCombo->setEditable(false);
    }
    d->retranslateWindowTitle();
#if defined(Q_WS_MAC)
    d->deleteNativeDialog_sys();
    setAttribute(Qt::WA_DontShowOnScreen, false);
#endif
}

/*
    Returns the file system model index that is the root index in the
    views
*/
QModelIndex QFileDialogPrivate::rootIndex() const {
    return mapToSource(qFileDialogUi->listView->rootIndex());
}

QAbstractItemView *QFileDialogPrivate::currentView() const {
    if (!qFileDialogUi->stackedWidget)
        return 0;
    if (qFileDialogUi->stackedWidget->currentWidget() == qFileDialogUi->listView->parent())
        return qFileDialogUi->listView;
    return qFileDialogUi->treeView;
}

QLineEdit *QFileDialogPrivate::lineEdit() const {
    return (QLineEdit*)qFileDialogUi->fileNameEdit;
}

/*
    Sets the view root index to be the file system model index
*/
void QFileDialogPrivate::setRootIndex(const QModelIndex &index) const {
    Q_ASSERT(index.isValid() ? index.model() == model : true);
    QModelIndex idx = mapFromSource(index);
    qFileDialogUi->treeView->setRootIndex(idx);
    qFileDialogUi->listView->setRootIndex(idx);
}
/*
    Select a file system model index
    returns the index that was selected (or not depending upon sortfilterproxymodel)
*/
QModelIndex QFileDialogPrivate::select(const QModelIndex &index) const {
    Q_ASSERT(index.isValid() ? index.model() == model : true);

    QModelIndex idx = mapFromSource(index);
    if (idx.isValid() && !qFileDialogUi->listView->selectionModel()->isSelected(idx))
        qFileDialogUi->listView->selectionModel()->select(idx,
            QItemSelectionModel::Select | QItemSelectionModel::Rows);
    return idx;
}

QFileDialog::AcceptMode QFileDialog::acceptMode() const
{
    Q_D(const QFileDialog);
    return d->acceptMode;
}

/*!
    \property QFileDialog::readOnly
    \obsolete
    \brief Whether the filedialog is read-only

    If this property is set to false, the file dialog will allow renaming,
    and deleting of files and directories and creating directories.

    Use setOption(ReadOnly, \e enabled) or testOption(ReadOnly) instead.
*/
void QFileDialog::setReadOnly(bool enabled)
{
    setOption(ReadOnly, enabled);
}

bool QFileDialog::isReadOnly() const
{
    return testOption(ReadOnly);
}

/*!
    \property QFileDialog::resolveSymlinks
    \obsolete
    \brief whether the filedialog should resolve shortcuts

    If this property is set to true, the file dialog will resolve
    shortcuts or symbolic links.

    Use setOption(DontResolveSymlinks, !\a enabled) or
    !testOption(DontResolveSymlinks).
*/
void QFileDialog::setResolveSymlinks(bool enabled)
{
    setOption(DontResolveSymlinks, !enabled);
}

bool QFileDialog::resolveSymlinks() const
{
    return !testOption(DontResolveSymlinks);
}

/*!
    \property QFileDialog::confirmOverwrite
    \obsolete
    \brief whether the filedialog should ask before accepting a selected file,
    when the accept mode is AcceptSave

    Use setOption(DontConfirmOverwrite, !\e enabled) or
    !testOption(DontConfirmOverwrite) instead.
*/
void QFileDialog::setConfirmOverwrite(bool enabled)
{
    setOption(DontConfirmOverwrite, !enabled);
}

bool QFileDialog::confirmOverwrite() const
{
    return !testOption(DontConfirmOverwrite);
}

/*!
    \property QFileDialog::defaultSuffix
    \brief suffix added to the filename if no other suffix was specified

    This property specifies a string that will be added to the
    filename if it has no suffix already. The suffix is typically
    used to indicate the file type (e.g. "txt" indicates a text
    file).
*/
void QFileDialog::setDefaultSuffix(const QString &suffix)
{
    Q_D(QFileDialog);
    d->defaultSuffix = suffix;
}

QString QFileDialog::defaultSuffix() const
{
    Q_D(const QFileDialog);
    return d->defaultSuffix;
}

/*!
    Sets the browsing history of the filedialog to contain the given
    \a paths.
*/
void QFileDialog::setHistory(const QStringList &paths)
{
    Q_D(QFileDialog);
    d->qFileDialogUi->lookInCombo->setHistory(paths);
}

void QFileDialogComboBox::setHistory(const QStringList &paths)
{
    m_history = paths;
    // Only populate the first item, showPopup will populate the rest if needed
    QList<QUrl> list;
    QModelIndex idx = d_ptr->model->index(d_ptr->rootPath());
    //On windows the popup display the "C:\", convert to nativeSeparators
    QUrl url = QUrl::fromLocalFile(QDir::toNativeSeparators(idx.data(QFileSystemModel::FilePathRole).toString()));
    if (url.isValid())
        list.append(url);
    urlModel->setUrls(list);
}

/*!
    Returns the browsing history of the filedialog as a list of paths.
*/
QStringList QFileDialog::history() const
{
    Q_D(const QFileDialog);
    QStringList currentHistory = d->qFileDialogUi->lookInCombo->history();
    //On windows the popup display the "C:\", convert to nativeSeparators
    QString newHistory = QDir::toNativeSeparators(d->rootIndex().data(QFileSystemModel::FilePathRole).toString());
    if (!currentHistory.contains(newHistory))
        currentHistory << newHistory;
    return currentHistory;
}

/*!
    Sets the item delegate used to render items in the views in the
    file dialog to the given \a delegate.

    \warning You should not share the same instance of a delegate between views.
    Doing so can cause incorrect or unintuitive editing behavior since each
    view connected to a given delegate may receive the \l{QAbstractItemDelegate::}{closeEditor()}
    signal, and attempt to access, modify or close an editor that has already been closed.

    Note that the model used is QFileSystemModel. It has custom item data roles, which is
    described by the \l{QFileSystemModel::}{Roles} enum. You can use a QFileIconProvider if
    you only want custom icons.

    \sa itemDelegate(), setIconProvider(), QFileSystemModel
*/
void QFileDialog::setItemDelegate(QAbstractItemDelegate *delegate)
{
    Q_D(QFileDialog);
    d->qFileDialogUi->listView->setItemDelegate(delegate);
    d->qFileDialogUi->treeView->setItemDelegate(delegate);
}

/*!
  Returns the item delegate used to render the items in the views in the filedialog.
*/
QAbstractItemDelegate *QFileDialog::itemDelegate() const
{
    Q_D(const QFileDialog);
    return d->qFileDialogUi->listView->itemDelegate();
}

/*!
    Sets the icon provider used by the filedialog to the specified \a provider.
*/
void QFileDialog::setIconProvider(QFileIconProvider *provider)
{
    Q_D(QFileDialog);
    d->model->setIconProvider(provider);
    //It forces the refresh of all entries in the side bar, then we can get new icons
    d->qFileDialogUi->sidebar->setUrls(d->qFileDialogUi->sidebar->urls());
}

/*!
    Returns the icon provider used by the filedialog.
*/
QFileIconProvider *QFileDialog::iconProvider() const
{
    Q_D(const QFileDialog);
    return d->model->iconProvider();
}

/*!
    Sets the \a text shown in the filedialog in the specified \a label.
*/
void QFileDialog::setLabelText(DialogLabel label, const QString &text)
{
    Q_D(QFileDialog);
    QPushButton *button;
    switch (label) {
    case LookIn:
        d->qFileDialogUi->lookInLabel->setText(text);
        break;
    case FileName:
        d->qFileDialogUi->fileNameLabel->setText(text);
        d->fileNameLabelExplicitlySat = true;
        break;
    case FileType:
        d->qFileDialogUi->fileTypeLabel->setText(text);
        break;
    case Accept:
        d->acceptLabel = text;
        if (acceptMode() == AcceptOpen)
            button = d->qFileDialogUi->buttonBox->button(QDialogButtonBox::Open);
        else
            button = d->qFileDialogUi->buttonBox->button(QDialogButtonBox::Save);
        if (button)
            button->setText(text);
        break;
    case Reject:
        button = d->qFileDialogUi->buttonBox->button(QDialogButtonBox::Cancel);
        if (button)
            button->setText(text);
        break;
    }
}

/*!
    Returns the text shown in the filedialog in the specified \a label.
*/
QString QFileDialog::labelText(DialogLabel label) const
{
    QPushButton *button;
    Q_D(const QFileDialog);
    switch (label) {
    case LookIn:
        return d->qFileDialogUi->lookInLabel->text();
    case FileName:
        return d->qFileDialogUi->fileNameLabel->text();
    case FileType:
        return d->qFileDialogUi->fileTypeLabel->text();
    case Accept:
        if (acceptMode() == AcceptOpen)
            button = d->qFileDialogUi->buttonBox->button(QDialogButtonBox::Open);
        else
            button = d->qFileDialogUi->buttonBox->button(QDialogButtonBox::Save);
        if (button)
            return button->text();
    case Reject:
        button = d->qFileDialogUi->buttonBox->button(QDialogButtonBox::Cancel);
        if (button)
            return button->text();
    }
    return QString();
}

/*
    For the native file dialogs
*/

#if defined(Q_WS_WIN)
extern QString qt_win_get_open_file_name(const QFileDialogArgs &args,
                                         QString *initialDirectory,
                                         QString *selectedFilter);

extern QString qt_win_get_save_file_name(const QFileDialogArgs &args,
                                         QString *initialDirectory,
                                         QString *selectedFilter);

extern QStringList qt_win_get_open_file_names(const QFileDialogArgs &args,
                                              QString *initialDirectory,
                                              QString *selectedFilter);

extern QString qt_win_get_existing_directory(const QFileDialogArgs &args);
#endif

/*!
    This is a convenience static function that returns an existing file
    selected by the user. If the user presses Cancel, it returns a null string.

    \snippet doc/src/snippets/code/src_gui_dialogs_qfiledialog.cpp 8

    The function creates a modal file dialog with the given \a parent widget.
    If \a parent is not 0, the dialog will be shown centered over the parent
    widget.

    The file dialog's working directory will be set to \a dir. If \a dir
    includes a file name, the file will be selected. Only files that match the
    given \a filter are shown. The filter selected is set to \a selectedFilter.
    The parameters \a dir, \a selectedFilter, and \a filter may be empty
    strings. If you want multiple filters, separate them with ';;', for
    example:

    \code
    "Images (*.png *.xpm *.jpg);;Text files (*.txt);;XML files (*.xml)"
    \endcode

    The \a options argument holds various options about how to run the dialog,
    see the QFileDialog::Option enum for more information on the flags you can
    pass.

    The dialog's caption is set to \a caption. If \a caption is not specified
    then a default caption will be used.

    On Windows and Mac OS X, this static function will use the native file
    dialog and not a QFileDialog.

    On Windows the dialog will spin a blocking modal event loop that will not
    dispatch any QTimers, and if \a parent is not 0 then it will position the
    dialog just below the parent's title bar.

    On Unix/X11, the normal behavior of the file dialog is to resolve and
    follow symlinks. For example, if \c{/usr/tmp} is a symlink to \c{/var/tmp},
    the file dialog will change to \c{/var/tmp} after entering \c{/usr/tmp}. If
    \a options includes DontResolveSymlinks, the file dialog will treat
    symlinks as regular directories.

    \warning Do not delete \a parent during the execution of the dialog. If you
    want to do this, you should create the dialog yourself using one of the
    QFileDialog constructors.

    \sa getOpenFileNames(), getSaveFileName(), getExistingDirectory()
*/
QString QFileDialog::getOpenFileName(QWidget *parent,
                               const QString &caption,
                               const QString &dir,
                               const QString &filter,
                               QString *selectedFilter,
                               Options options)
{
    if (qt_filedialog_open_filename_hook && !(options & DontUseNativeDialog))
        return qt_filedialog_open_filename_hook(parent, caption, dir, filter, selectedFilter, options);
    QFileDialogArgs args;
    args.parent = parent;
    args.caption = caption;
    args.directory = QFileDialogPrivate::workingDirectory(dir);
    args.selection = QFileDialogPrivate::initialSelection(dir);
    args.filter = filter;
    args.mode = ExistingFile;
    args.options = options;
#if defined(Q_WS_WIN)
    if (qt_use_native_dialogs && !(args.options & DontUseNativeDialog)) {
        return qt_win_get_open_file_name(args, &(args.directory), selectedFilter);
    }
#endif

    // create a qt dialog
    QFileDialog dialog(args);
    if (selectedFilter)
        dialog.selectNameFilter(*selectedFilter);
    if (dialog.exec() == QDialog::Accepted) {
        if (selectedFilter)
            *selectedFilter = dialog.selectedFilter();
        return dialog.selectedFiles().value(0);
    }
    return QString();
}

/*!
    This is a convenience static function that will return one or more existing
    files selected by the user.

    \snippet doc/src/snippets/code/src_gui_dialogs_qfiledialog.cpp 9

    This function creates a modal file dialog with the given \a parent widget.
    If \a parent is not 0, the dialog will be shown centered over the parent
    widget.

    The file dialog's working directory will be set to \a dir. If \a dir
    includes a file name, the file will be selected. The filter is set to
    \a filter so that only those files which match the filter are shown. The
    filter selected is set to \a selectedFilter. The parameters \a dir,
    \a selectedFilter and \a filter may be empty strings. If you need multiple
    filters, separate them with ';;', for instance:

    \code
    "Images (*.png *.xpm *.jpg);;Text files (*.txt);;XML files (*.xml)"
    \endcode

    The dialog's caption is set to \a caption. If \a caption is not specified
    then a default caption will be used.

    On Windows and Mac OS X, this static function will use the native file
    dialog and not a QFileDialog.

    On Windows the dialog will spin a blocking modal event loop that will not
    dispatch any QTimers, and if \a parent is not 0 then it will position the
    dialog just below the parent's title bar.

    On Unix/X11, the normal behavior of the file dialog is to resolve and
    follow symlinks. For example, if \c{/usr/tmp} is a symlink to \c{/var/tmp},
    the file dialog will change to \c{/var/tmp} after entering \c{/usr/tmp}.
    The \a options argument holds various options about how to run the dialog,
    see the QFileDialog::Option enum for more information on the flags you can
    pass.

    \note If you want to iterate over the list of files, you should iterate
    over a copy. For example:

    \snippet doc/src/snippets/code/src_gui_dialogs_qfiledialog.cpp 10

    \warning Do not delete \a parent during the execution of the dialog. If you
    want to do this, you should create the dialog yourself using one of the
    QFileDialog constructors.

    \sa getOpenFileName(), getSaveFileName(), getExistingDirectory()
*/
QStringList QFileDialog::getOpenFileNames(QWidget *parent,
                                          const QString &caption,
                                          const QString &dir,
                                          const QString &filter,
                                          QString *selectedFilter,
                                          Options options)
{
    if (qt_filedialog_open_filenames_hook && !(options & DontUseNativeDialog))
        return qt_filedialog_open_filenames_hook(parent, caption, dir, filter, selectedFilter, options);
    QFileDialogArgs args;
    args.parent = parent;
    args.caption = caption;
    args.directory = QFileDialogPrivate::workingDirectory(dir);
    args.selection = QFileDialogPrivate::initialSelection(dir);
    args.filter = filter;
    args.mode = ExistingFiles;
    args.options = options;

#if defined(Q_WS_WIN)
    if (qt_use_native_dialogs && !(args.options & DontUseNativeDialog)) {
        return qt_win_get_open_file_names(args, &(args.directory), selectedFilter);
    }
#endif

    // create a qt dialog
    QFileDialog dialog(args);
    if (selectedFilter)
        dialog.selectNameFilter(*selectedFilter);
    if (dialog.exec() == QDialog::Accepted) {
        if (selectedFilter)
            *selectedFilter = dialog.selectedFilter();
        return dialog.selectedFiles();
    }
    return QStringList();
}

/*!
    This is a convenience static function that will return a file name selected
    by the user. The file does not have to exist.

    It creates a modal file dialog with the given \a parent widget. If
    \a parent is not 0, the dialog will be shown centered over the parent
    widget.

    \snippet doc/src/snippets/code/src_gui_dialogs_qfiledialog.cpp 11

    The file dialog's working directory will be set to \a dir. If \a dir
    includes a file name, the file will be selected. Only files that match the
    \a filter are shown. The filter selected is set to \a selectedFilter. The
    parameters \a dir, \a selectedFilter, and \a filter may be empty strings.
    Multiple filters are separated with ';;'. For instance:

    \code
    "Images (*.png *.xpm *.jpg);;Text files (*.txt);;XML files (*.xml)"
    \endcode

    The \a options argument holds various options about how to run the dialog,
    see the QFileDialog::Option enum for more information on the flags you can
    pass.

    The default filter can be chosen by setting \a selectedFilter to the
    desired value.

    The dialog's caption is set to \a caption. If \a caption is not specified,
    a default caption will be used.

    On Windows and Mac OS X, this static function will use the native file
    dialog and not a QFileDialog.

    On Windows the dialog will spin a blocking modal event loop that will not
    dispatch any QTimers, and if \a parent is not 0 then it will position the
    dialog just below the parent's title bar. On Mac OS X, with its native file
    dialog, the filter argument is ignored.

    On Unix/X11, the normal behavior of the file dialog is to resolve and
    follow symlinks. For example, if \c{/usr/tmp} is a symlink to \c{/var/tmp},
    the file dialog will change to \c{/var/tmp} after entering \c{/usr/tmp}. If
    \a options includes DontResolveSymlinks the file dialog will treat symlinks
    as regular directories.

    \warning Do not delete \a parent during the execution of the dialog. If you
    want to do this, you should create the dialog yourself using one of the
    QFileDialog constructors.

    \sa getOpenFileName(), getOpenFileNames(), getExistingDirectory()
*/
QString QFileDialog::getSaveFileName(QWidget *parent,
                                     const QString &caption,
                                     const QString &dir,
                                     const QString &filter,
                                     QString *selectedFilter,
                                     Options options)
{
    if (qt_filedialog_save_filename_hook && !(options & DontUseNativeDialog))
        return qt_filedialog_save_filename_hook(parent, caption, dir, filter, selectedFilter, options);
    QFileDialogArgs args;
    args.parent = parent;
    args.caption = caption;
    args.directory = QFileDialogPrivate::workingDirectory(dir);
    args.selection = QFileDialogPrivate::initialSelection(dir);
    args.filter = filter;
    args.mode = AnyFile;
    args.options = options;

#if defined(Q_WS_WIN)
    if (qt_use_native_dialogs && !(args.options & DontUseNativeDialog)) {
        return qt_win_get_save_file_name(args, &(args.directory), selectedFilter);
    }
#endif

    // create a qt dialog
    QFileDialog dialog(args);
    dialog.setAcceptMode(AcceptSave);
    if (selectedFilter)
        dialog.selectNameFilter(*selectedFilter);
    if (dialog.exec() == QDialog::Accepted) {
        if (selectedFilter)
            *selectedFilter = dialog.selectedFilter();
        return dialog.selectedFiles().value(0);
    }

    return QString();
}

/*!
    This is a convenience static function that will return an existing
    directory selected by the user.

    \snippet doc/src/snippets/code/src_gui_dialogs_qfiledialog.cpp 12

    This function creates a modal file dialog with the given \a parent widget.
    If \a parent is not 0, the dialog will be shown centered over the parent
    widget.

    The dialog's working directory is set to \a dir, and the caption is set to
    \a caption. Either of these may be an empty string in which case the
    current directory and a default caption will be used respectively.

    The \a options argument holds various options about how to run the dialog,
    see the QFileDialog::Option enum for more information on the flags you can
    pass. To ensure a native file dialog, \l{QFileDialog::}{ShowDirsOnly} must
    be set.

    On Windows and Mac OS X, this static function will use the native file
    dialog and not a QFileDialog. On Windows CE, if the device has no native
    file dialog, a QFileDialog will be used.

    On Unix/X11, the normal behavior of the file dialog is to resolve and
    follow symlinks. For example, if \c{/usr/tmp} is a symlink to \c{/var/tmp},
    the file dialog will change to \c{/var/tmp} after entering \c{/usr/tmp}. If
    \a options includes DontResolveSymlinks, the file dialog will treat
    symlinks as regular directories.

    On Windows the dialog will spin a blocking modal event loop that will not
    dispatch any QTimers, and if \a parent is not 0 then it will position the
    dialog just below the parent's title bar.

    \warning Do not delete \a parent during the execution of the dialog. If you
    want to do this, you should create the dialog yourself using one of the
    QFileDialog constructors.

    \sa getOpenFileName(), getOpenFileNames(), getSaveFileName()
*/
QString QFileDialog::getExistingDirectory(QWidget *parent,
                                          const QString &caption,
                                          const QString &dir,
                                          Options options)
{
    if (qt_filedialog_existing_directory_hook && !(options & DontUseNativeDialog))
        return qt_filedialog_existing_directory_hook(parent, caption, dir, options);
    QFileDialogArgs args;
    args.parent = parent;
    args.caption = caption;
    args.directory = QFileDialogPrivate::workingDirectory(dir);
    args.mode = (options & ShowDirsOnly ? DirectoryOnly : Directory);
    args.options = options;

#if defined(Q_WS_WIN)
    if (qt_use_native_dialogs && !(args.options & DontUseNativeDialog) && (options & ShowDirsOnly)
#if defined(Q_WS_WINCE)
        && qt_priv_ptr_valid
#endif
        ) {
        return qt_win_get_existing_directory(args);
    }
#endif

    // create a qt dialog
    QFileDialog dialog(args);
    if (dialog.exec() == QDialog::Accepted) {
        return dialog.selectedFiles().value(0);
    }
    return QString();
}

inline static QString _qt_get_directory(const QString &path)
{
    QFileInfo info = QFileInfo(QDir::current(), path);
    if (info.exists() && info.isDir())
        return QDir::cleanPath(info.absoluteFilePath());
    info.setFile(info.absolutePath());
    if (info.exists() && info.isDir())
        return info.absoluteFilePath();
    return QString();
}
/*
    Get the initial directory path

    \sa initialSelection()
 */
QString QFileDialogPrivate::workingDirectory(const QString &path)
{
    if (!path.isEmpty()) {
        QString directory = _qt_get_directory(path);
        if (!directory.isEmpty())
            return directory;
    }
    QString directory = _qt_get_directory(*lastVisitedDir());
    if (!directory.isEmpty())
        return directory;
    return QDir::currentPath();
}

/*
    Get the initial selection given a path.  The initial directory
    can contain both the initial directory and initial selection
    /home/user/foo.txt

    \sa workingDirectory()
 */
QString QFileDialogPrivate::initialSelection(const QString &path)
{
    if (!path.isEmpty()) {
        QFileInfo info(path);
        if (!info.isDir())
            return info.fileName();
    }
    return QString();
}

/*!
 \reimp
*/
void QFileDialog::done(int result)
{
    Q_D(QFileDialog);

    QDialog::done(result);

    if (d->receiverToDisconnectOnClose) {
        disconnect(this, d->signalToDisconnectOnClose,
                   d->receiverToDisconnectOnClose, d->memberToDisconnectOnClose);
        d->receiverToDisconnectOnClose = 0;
    }
    d->memberToDisconnectOnClose.clear();
    d->signalToDisconnectOnClose.clear();
}

/*!
 \reimp
*/
void QFileDialog::accept()
{
    Q_D(QFileDialog);
    QStringList files = selectedFiles();
    if (files.isEmpty())
        return;
    if (d->nativeDialogInUse){
        d->emitFilesSelected(files);
        QDialog::accept();
        return;
    }

    QString lineEditText = d->lineEdit()->text();
    // "hidden feature" type .. and then enter, and it will move up a dir
    // special case for ".."
    if (lineEditText == QLatin1String("..")) {
        d->_q_navigateToParent();
        bool block = d->qFileDialogUi->fileNameEdit->blockSignals(true);
        d->lineEdit()->selectAll();
        d->qFileDialogUi->fileNameEdit->blockSignals(block);
        return;
    }

    switch (d->fileMode) {
    case DirectoryOnly:
    case Directory: {
        QString fn = files.first();
        QFileInfo info(fn);
        if (!info.exists())
            info = QFileInfo(d->getEnvironmentVariable(fn));
        if (!info.exists()) {
#ifndef QT_NO_MESSAGEBOX
            QString message = tr("%1\nDirectory not found.\nPlease verify the "
                                          "correct directory name was given.");
            QMessageBox::warning(this, windowTitle(), message.arg(info.fileName()));
#endif // QT_NO_MESSAGEBOX
            return;
        }
        if (info.isDir()) {
            d->emitFilesSelected(files);
            QDialog::accept();
        }
        return;
    }

    case AnyFile: {
        QString fn = files.first();
        QFileInfo info(fn);
        if (info.isDir()) {
            setDirectory(info.absoluteFilePath());
            return;
        }

        if (!info.exists()) {
            int maxNameLength = d->maxNameLength(info.path());
            if (maxNameLength >= 0 && info.fileName().length() > maxNameLength)
                return;
        }

        // check if we have to ask for permission to overwrite the file
        if (!info.exists() || !confirmOverwrite() || acceptMode() == AcceptOpen) {
            d->emitFilesSelected(QStringList(fn));
            QDialog::accept();
#ifndef QT_NO_MESSAGEBOX
        } else {
            if (QMessageBox::warning(this, windowTitle(),
                                     tr("%1 already exists.\nDo you want to replace it?")
                                     .arg(info.fileName()),
                                     QMessageBox::Yes | QMessageBox::No, QMessageBox::No)
                    == QMessageBox::Yes) {
                d->emitFilesSelected(QStringList(fn));
                QDialog::accept();
            }
#endif
        }
        return;
    }

    case ExistingFile:
    case ExistingFiles:
        for (int i = 0; i < files.count(); ++i) {
            QFileInfo info(files.at(i));
            if (!info.exists())
                info = QFileInfo(d->getEnvironmentVariable(files.at(i)));
            if (!info.exists()) {
#ifndef QT_NO_MESSAGEBOX
                QString message = tr("%1\nFile not found.\nPlease verify the "
                                     "correct file name was given.");
                QMessageBox::warning(this, windowTitle(), message.arg(info.fileName()));
#endif // QT_NO_MESSAGEBOX
                return;
            }
            if (info.isDir()) {
                setDirectory(info.absoluteFilePath());
                d->lineEdit()->clear();
                return;
            }
        }
        d->emitFilesSelected(files);
        QDialog::accept();
        return;
    }
}

/*!
    \internal

    Create widgets, layout and set default values
*/
void QFileDialogPrivate::init(const QString &directory, const QString &nameFilter,
                              const QString &caption)
{
    Q_Q(QFileDialog);
    if (!caption.isEmpty()) {
        useDefaultCaption = false;
        setWindowTitle = caption;
        q->setWindowTitle(caption);
    }

    createWidgets();
    createMenuActions();
    retranslateStrings();
    q->setFileMode(fileMode);

#ifndef QT_NO_SETTINGS
    QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));
    settings.beginGroup(QLatin1String("Qt"));
    if (!directory.isEmpty())
        setLastVisitedDirectory(workingDirectory(directory));
    q->restoreState(settings.value(QLatin1String("filedialog")).toByteArray());
#endif

#if defined(Q_EMBEDDED_SMALLSCREEN)
    qFileDialogUi->lookInLabel->setVisible(false);
    qFileDialogUi->fileNameLabel->setVisible(false);
    qFileDialogUi->fileTypeLabel->setVisible(false);
    qFileDialogUi->sidebar->hide();
#endif
    // Default case
    if (!nameFilter.isEmpty())
        q->setNameFilter(nameFilter);
    q->setAcceptMode(QFileDialog::AcceptOpen);
    q->setDirectory(workingDirectory(directory));
    q->selectFile(initialSelection(directory));

    _q_updateOkButton();
    q->resize(q->sizeHint());
}

/*!
    \internal

    Create the widgets, set properties and connections
*/
void QFileDialogPrivate::createWidgets()
{
    Q_Q(QFileDialog);
    model = new QFileSystemModel(q);
    model->setObjectName(QLatin1String("qt_filesystem_model"));
#ifdef Q_WS_MAC
    model->setNameFilterDisables(true);
#else
    model->setNameFilterDisables(false);
#endif
    model->d_func()->disableRecursiveSort = true;
    QFileDialog::connect(model, SIGNAL(fileRenamed(QString,QString,QString)), q, SLOT(_q_fileRenamed(QString,QString,QString)));
    QFileDialog::connect(model, SIGNAL(rootPathChanged(QString)),
            q, SLOT(_q_pathChanged(QString)));
    QFileDialog::connect(model, SIGNAL(rowsInserted(QModelIndex,int,int)),
            q, SLOT(_q_rowsInserted(QModelIndex)));
    model->setReadOnly(false);

    qFileDialogUi.reset(new Ui_QFileDialog());
    qFileDialogUi->setupUi(q);

    QList<QUrl> initialBookmarks;
    initialBookmarks << QUrl::fromLocalFile(QLatin1String(""))
                     << QUrl::fromLocalFile(QDir::homePath());
    qFileDialogUi->sidebar->init(model, initialBookmarks);
    QFileDialog::connect(qFileDialogUi->sidebar, SIGNAL(goToUrl(QUrl)),
                         q, SLOT(_q_goToUrl(QUrl)));

    QObject::connect(qFileDialogUi->buttonBox, SIGNAL(accepted()), q, SLOT(accept()));
    QObject::connect(qFileDialogUi->buttonBox, SIGNAL(rejected()), q, SLOT(reject()));


    qFileDialogUi->lookInCombo->init(this);
    QObject::connect(qFileDialogUi->lookInCombo, SIGNAL(activated(QString)), q, SLOT(_q_goToDirectory(QString)));

    qFileDialogUi->lookInCombo->setInsertPolicy(QComboBox::NoInsert);
    qFileDialogUi->lookInCombo->setDuplicatesEnabled(false);

    // filename
    qFileDialogUi->fileNameEdit->init(this);
#ifndef QT_NO_SHORTCUT
    qFileDialogUi->fileNameLabel->setBuddy(qFileDialogUi->fileNameEdit);
#endif
#ifndef QT_NO_FSCOMPLETER
    completer = new QFSCompleter(model, q);
    qFileDialogUi->fileNameEdit->setCompleter(completer);
    QObject::connect(qFileDialogUi->fileNameEdit, SIGNAL(textChanged(QString)),
            q, SLOT(_q_autoCompleteFileName(QString)));
#endif // QT_NO_FSCOMPLETER
    QObject::connect(qFileDialogUi->fileNameEdit, SIGNAL(textChanged(QString)),
                     q, SLOT(_q_updateOkButton()));

    QObject::connect(qFileDialogUi->fileNameEdit, SIGNAL(returnPressed()), q, SLOT(accept()));

    // filetype
    qFileDialogUi->fileTypeCombo->setDuplicatesEnabled(false);
    qFileDialogUi->fileTypeCombo->setSizeAdjustPolicy(QComboBox::AdjustToMinimumContentsLength);
    qFileDialogUi->fileTypeCombo->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
    QObject::connect(qFileDialogUi->fileTypeCombo, SIGNAL(activated(int)),
                     q, SLOT(_q_useNameFilter(int)));
    QObject::connect(qFileDialogUi->fileTypeCombo, SIGNAL(activated(QString)),
                     q, SIGNAL(filterSelected(QString)));

    qFileDialogUi->listView->init(this);
    qFileDialogUi->listView->setModel(model);
    QObject::connect(qFileDialogUi->listView, SIGNAL(activated(QModelIndex)),
                     q, SLOT(_q_enterDirectory(QModelIndex)));
    QObject::connect(qFileDialogUi->listView, SIGNAL(customContextMenuRequested(QPoint)),
                    q, SLOT(_q_showContextMenu(QPoint)));
#ifndef QT_NO_SHORTCUT
    QShortcut *shortcut = new QShortcut(qFileDialogUi->listView);
    shortcut->setKey(QKeySequence(QLatin1String("Delete")));
    QObject::connect(shortcut, SIGNAL(activated()), q, SLOT(_q_deleteCurrent()));
#endif

    qFileDialogUi->treeView->init(this);
    qFileDialogUi->treeView->setModel(model);
    QHeaderView *treeHeader = qFileDialogUi->treeView->header();
    QFontMetrics fm(q->font());
    treeHeader->resizeSection(0, fm.width(QLatin1String("wwwwwwwwwwwwwwwwwwwwwwwwww")));
    treeHeader->resizeSection(1, fm.width(QLatin1String("128.88 GB")));
    treeHeader->resizeSection(2, fm.width(QLatin1String("mp3Folder")));
    treeHeader->resizeSection(3, fm.width(QLatin1String("10/29/81 02:02PM")));
    treeHeader->setContextMenuPolicy(Qt::ActionsContextMenu);

    QActionGroup *showActionGroup = new QActionGroup(q);
    showActionGroup->setExclusive(false);
    QObject::connect(showActionGroup, SIGNAL(triggered(QAction*)),
                     q, SLOT(_q_showHeader(QAction*)));;

    QAbstractItemModel *abstractModel = model;
#ifndef QT_NO_PROXYMODEL
    if (proxyModel)
        abstractModel = proxyModel;
#endif
    for (int i = 1; i < abstractModel->columnCount(QModelIndex()); ++i) {
        QAction *showHeader = new QAction(showActionGroup);
        showHeader->setCheckable(true);
        showHeader->setChecked(true);
        treeHeader->addAction(showHeader);
    }

    QScopedPointer<QItemSelectionModel> selModel(qFileDialogUi->treeView->selectionModel());
    qFileDialogUi->treeView->setSelectionModel(qFileDialogUi->listView->selectionModel());

    QObject::connect(qFileDialogUi->treeView, SIGNAL(activated(QModelIndex)),
                     q, SLOT(_q_enterDirectory(QModelIndex)));
    QObject::connect(qFileDialogUi->treeView, SIGNAL(customContextMenuRequested(QPoint)),
                     q, SLOT(_q_showContextMenu(QPoint)));
#ifndef QT_NO_SHORTCUT
    shortcut = new QShortcut(qFileDialogUi->treeView);
    shortcut->setKey(QKeySequence(QLatin1String("Delete")));
    QObject::connect(shortcut, SIGNAL(activated()), q, SLOT(_q_deleteCurrent()));
#endif

    // Selections
    QItemSelectionModel *selections = qFileDialogUi->listView->selectionModel();
    QObject::connect(selections, SIGNAL(selectionChanged(QItemSelection,QItemSelection)),
                     q, SLOT(_q_selectionChanged()));
    QObject::connect(selections, SIGNAL(currentChanged(QModelIndex,QModelIndex)),
                     q, SLOT(_q_currentChanged(QModelIndex)));
    qFileDialogUi->splitter->setStretchFactor(qFileDialogUi->splitter->indexOf(qFileDialogUi->splitter->widget(1)), QSizePolicy::Expanding);

    createToolButtons();
}

void QFileDialogPrivate::_q_showHeader(QAction *action)
{
    Q_Q(QFileDialog);
    QActionGroup *actionGroup = qobject_cast<QActionGroup*>(q->sender());
    qFileDialogUi->treeView->header()->setSectionHidden(actionGroup->actions().indexOf(action) + 1, !action->isChecked());
}

#ifndef QT_NO_PROXYMODEL
/*!
    \since 4.3

    Sets the model for the views to the given \a proxyModel.  This is useful if you
    want to modify the underlying model; for example, to add columns, filter
    data or add drives.

    Any existing proxy model will be removed, but not deleted.  The file dialog
    will take ownership of the \a proxyModel.

    \sa proxyModel()
*/
void QFileDialog::setProxyModel(QAbstractProxyModel *proxyModel)
{
    Q_D(QFileDialog);
    if ((!proxyModel && !d->proxyModel)
        || (proxyModel == d->proxyModel))
        return;

    QModelIndex idx = d->rootIndex();
    if (d->proxyModel) {
        disconnect(d->proxyModel, SIGNAL(rowsInserted(QModelIndex,int,int)),
            this, SLOT(_q_rowsInserted(QModelIndex)));
    } else {
        disconnect(d->model, SIGNAL(rowsInserted(QModelIndex,int,int)),
            this, SLOT(_q_rowsInserted(QModelIndex)));
    }

    if (proxyModel != 0) {
        proxyModel->setParent(this);
        d->proxyModel = proxyModel;
        proxyModel->setSourceModel(d->model);
        d->qFileDialogUi->listView->setModel(d->proxyModel);
        d->qFileDialogUi->treeView->setModel(d->proxyModel);
#ifndef QT_NO_FSCOMPLETER
        d->completer->setModel(d->proxyModel);
        d->completer->proxyModel = d->proxyModel;
#endif
        connect(d->proxyModel, SIGNAL(rowsInserted(QModelIndex,int,int)),
            this, SLOT(_q_rowsInserted(QModelIndex)));
    } else {
        d->proxyModel = 0;
        d->qFileDialogUi->listView->setModel(d->model);
        d->qFileDialogUi->treeView->setModel(d->model);
#ifndef QT_NO_FSCOMPLETER
        d->completer->setModel(d->model);
        d->completer->sourceModel = d->model;
        d->completer->proxyModel = 0;
#endif
        connect(d->model, SIGNAL(rowsInserted(QModelIndex,int,int)),
            this, SLOT(_q_rowsInserted(QModelIndex)));
    }
    QScopedPointer<QItemSelectionModel> selModel(d->qFileDialogUi->treeView->selectionModel());
    d->qFileDialogUi->treeView->setSelectionModel(d->qFileDialogUi->listView->selectionModel());

    d->setRootIndex(idx);

    // reconnect selection
    QItemSelectionModel *selections = d->qFileDialogUi->listView->selectionModel();
    QObject::connect(selections, SIGNAL(selectionChanged(QItemSelection,QItemSelection)),
                     this, SLOT(_q_selectionChanged()));
    QObject::connect(selections, SIGNAL(currentChanged(QModelIndex,QModelIndex)),
                     this, SLOT(_q_currentChanged(QModelIndex)));
}

/*!
    Returns the proxy model used by the file dialog.  By default no proxy is set.

    \sa setProxyModel()
*/
QAbstractProxyModel *QFileDialog::proxyModel() const
{
    Q_D(const QFileDialog);
    return d->proxyModel;
}
#endif // QT_NO_PROXYMODEL

/*!
    \internal

    Create tool buttons, set properties and connections
*/
void QFileDialogPrivate::createToolButtons()
{
    Q_Q(QFileDialog);
    qFileDialogUi->backButton->setIcon(q->style()->standardIcon(QStyle::SP_ArrowBack, 0, q));
    qFileDialogUi->backButton->setAutoRaise(true);
    qFileDialogUi->backButton->setEnabled(false);
    QObject::connect(qFileDialogUi->backButton, SIGNAL(clicked()), q, SLOT(_q_navigateBackward()));

    qFileDialogUi->forwardButton->setIcon(q->style()->standardIcon(QStyle::SP_ArrowForward, 0, q));
    qFileDialogUi->forwardButton->setAutoRaise(true);
    qFileDialogUi->forwardButton->setEnabled(false);
    QObject::connect(qFileDialogUi->forwardButton, SIGNAL(clicked()), q, SLOT(_q_navigateForward()));

    qFileDialogUi->toParentButton->setIcon(q->style()->standardIcon(QStyle::SP_FileDialogToParent, 0, q));
    qFileDialogUi->toParentButton->setAutoRaise(true);
    qFileDialogUi->toParentButton->setEnabled(false);
    QObject::connect(qFileDialogUi->toParentButton, SIGNAL(clicked()), q, SLOT(_q_navigateToParent()));

    qFileDialogUi->listModeButton->setIcon(q->style()->standardIcon(QStyle::SP_FileDialogListView, 0, q));
    qFileDialogUi->listModeButton->setAutoRaise(true);
    qFileDialogUi->listModeButton->setDown(true);
    QObject::connect(qFileDialogUi->listModeButton, SIGNAL(clicked()), q, SLOT(_q_showListView()));

    qFileDialogUi->detailModeButton->setIcon(q->style()->standardIcon(QStyle::SP_FileDialogDetailedView, 0, q));
    qFileDialogUi->detailModeButton->setAutoRaise(true);
    QObject::connect(qFileDialogUi->detailModeButton, SIGNAL(clicked()), q, SLOT(_q_showDetailsView()));

    QSize toolSize(qFileDialogUi->fileNameEdit->sizeHint().height(), qFileDialogUi->fileNameEdit->sizeHint().height());
    qFileDialogUi->backButton->setFixedSize(toolSize);
    qFileDialogUi->listModeButton->setFixedSize(toolSize);
    qFileDialogUi->detailModeButton->setFixedSize(toolSize);
    qFileDialogUi->forwardButton->setFixedSize(toolSize);
    qFileDialogUi->toParentButton->setFixedSize(toolSize);

    qFileDialogUi->newFolderButton->setIcon(q->style()->standardIcon(QStyle::SP_FileDialogNewFolder, 0, q));
    qFileDialogUi->newFolderButton->setFixedSize(toolSize);
    qFileDialogUi->newFolderButton->setAutoRaise(true);
    qFileDialogUi->newFolderButton->setEnabled(false);
    QObject::connect(qFileDialogUi->newFolderButton, SIGNAL(clicked()), q, SLOT(_q_createDirectory()));
}

/*!
    \internal

    Create actions which will be used in the right click.
*/
void QFileDialogPrivate::createMenuActions()
{
    Q_Q(QFileDialog);

    QAction *goHomeAction =  new QAction(q);
#ifndef QT_NO_SHORTCUT
    goHomeAction->setShortcut(Qt::CTRL + Qt::Key_H + Qt::SHIFT);
#endif
    QObject::connect(goHomeAction, SIGNAL(triggered()), q, SLOT(_q_goHome()));
    q->addAction(goHomeAction);

    // ### TODO add Desktop & Computer actions

    QAction *goToParent =  new QAction(q);
    goToParent->setObjectName(QLatin1String("qt_goto_parent_action"));
#ifndef QT_NO_SHORTCUT
    goToParent->setShortcut(Qt::CTRL + Qt::UpArrow);
#endif
    QObject::connect(goToParent, SIGNAL(triggered()), q, SLOT(_q_navigateToParent()));
    q->addAction(goToParent);

    renameAction = new QAction(q);
    renameAction->setEnabled(false);
    renameAction->setObjectName(QLatin1String("qt_rename_action"));
    QObject::connect(renameAction, SIGNAL(triggered()), q, SLOT(_q_renameCurrent()));

    deleteAction = new QAction(q);
    deleteAction->setEnabled(false);
    deleteAction->setObjectName(QLatin1String("qt_delete_action"));
    QObject::connect(deleteAction, SIGNAL(triggered()), q, SLOT(_q_deleteCurrent()));

    showHiddenAction = new QAction(q);
    showHiddenAction->setObjectName(QLatin1String("qt_show_hidden_action"));
    showHiddenAction->setCheckable(true);
    QObject::connect(showHiddenAction, SIGNAL(triggered()), q, SLOT(_q_showHidden()));

    newFolderAction = new QAction(q);
    newFolderAction->setObjectName(QLatin1String("qt_new_folder_action"));
    QObject::connect(newFolderAction, SIGNAL(triggered()), q, SLOT(_q_createDirectory()));
}

void QFileDialogPrivate::_q_goHome()
{
    Q_Q(QFileDialog);
    q->setDirectory(QDir::homePath());
}

/*!
    \internal

    Update history with new path, buttons, and combo
*/
void QFileDialogPrivate::_q_pathChanged(const QString &newPath)
{
    Q_Q(QFileDialog);
    QDir dir(model->rootDirectory());
    qFileDialogUi->toParentButton->setEnabled(dir.exists());
    qFileDialogUi->sidebar->selectUrl(QUrl::fromLocalFile(newPath));
    q->setHistory(qFileDialogUi->lookInCombo->history());

    if (currentHistoryLocation < 0 || currentHistory.value(currentHistoryLocation) != QDir::toNativeSeparators(newPath)) {
        while (currentHistoryLocation >= 0 && currentHistoryLocation + 1 < currentHistory.count()) {
            currentHistory.removeLast();
        }
        currentHistory.append(QDir::toNativeSeparators(newPath));
        ++currentHistoryLocation;
    }
    qFileDialogUi->forwardButton->setEnabled(currentHistory.size() - currentHistoryLocation > 1);
    qFileDialogUi->backButton->setEnabled(currentHistoryLocation > 0);
}

/*!
    \internal

    Navigates to the last directory viewed in the dialog.
*/
void QFileDialogPrivate::_q_navigateBackward()
{
    Q_Q(QFileDialog);
    if (!currentHistory.isEmpty() && currentHistoryLocation > 0) {
        --currentHistoryLocation;
        QString previousHistory = currentHistory.at(currentHistoryLocation);
        q->setDirectory(previousHistory);
    }
}

/*!
    \internal

    Navigates to the last directory viewed in the dialog.
*/
void QFileDialogPrivate::_q_navigateForward()
{
    Q_Q(QFileDialog);
    if (!currentHistory.isEmpty() && currentHistoryLocation < currentHistory.size() - 1) {
        ++currentHistoryLocation;
        QString nextHistory = currentHistory.at(currentHistoryLocation);
        q->setDirectory(nextHistory);
    }
}

/*!
    \internal

    Navigates to the parent directory of the currently displayed directory
    in the dialog.
*/
void QFileDialogPrivate::_q_navigateToParent()
{
    Q_Q(QFileDialog);
    QDir dir(model->rootDirectory());
    QString newDirectory;
    if (dir.isRoot()) {
        newDirectory = model->myComputer().toString();
    } else {
        dir.cdUp();
        newDirectory = dir.absolutePath();
    }
    q->setDirectory(newDirectory);
    emit q->directoryEntered(newDirectory);
}

/*!
    \internal

    Creates a new directory, first asking the user for a suitable name.
*/
void QFileDialogPrivate::_q_createDirectory()
{
    Q_Q(QFileDialog);
    qFileDialogUi->listView->clearSelection();

    QString newFolderString = QFileDialog::tr("New Folder");
    QString folderName = newFolderString;
    QString prefix = q->directory().absolutePath() + QDir::separator();
    if (QFile::exists(prefix + folderName)) {
        qlonglong suffix = 2;
        while (QFile::exists(prefix + folderName)) {
            folderName = newFolderString + QString::number(suffix++);
        }
    }

    QModelIndex parent = rootIndex();
    QModelIndex index = model->mkdir(parent, folderName);
    if (!index.isValid())
        return;

    index = select(index);
    if (index.isValid()) {
        qFileDialogUi->treeView->setCurrentIndex(index);
        currentView()->edit(index);
    }
}

void QFileDialogPrivate::_q_showListView()
{
    qFileDialogUi->listModeButton->setDown(true);
    qFileDialogUi->detailModeButton->setDown(false);
    qFileDialogUi->treeView->hide();
    qFileDialogUi->listView->show();
    qFileDialogUi->stackedWidget->setCurrentWidget(qFileDialogUi->listView->parentWidget());
    qFileDialogUi->listView->doItemsLayout();
}

void QFileDialogPrivate::_q_showDetailsView()
{
    qFileDialogUi->listModeButton->setDown(false);
    qFileDialogUi->detailModeButton->setDown(true);
    qFileDialogUi->listView->hide();
    qFileDialogUi->treeView->show();
    qFileDialogUi->stackedWidget->setCurrentWidget(qFileDialogUi->treeView->parentWidget());
    qFileDialogUi->treeView->doItemsLayout();
}

/*!
    \internal

    Show the context menu for the file/dir under position
*/
void QFileDialogPrivate::_q_showContextMenu(const QPoint &position)
{
#ifdef QT_NO_MENU
    Q_UNUSED(position);
#else
    Q_Q(QFileDialog);
    QAbstractItemView *view = 0;
    if (q->viewMode() == QFileDialog::Detail)
        view = qFileDialogUi->treeView;
    else
        view = qFileDialogUi->listView;
    QModelIndex index = view->indexAt(position);
    index = mapToSource(index.sibling(index.row(), 0));

    QMenu menu(view);
    if (index.isValid()) {
        // file context menu
        QFile::Permissions p(index.parent().data(QFileSystemModel::FilePermissions).toInt());
        renameAction->setEnabled(p & QFile::WriteUser);
        menu.addAction(renameAction);
        deleteAction->setEnabled(p & QFile::WriteUser);
        menu.addAction(deleteAction);
        menu.addSeparator();
    }
    menu.addAction(showHiddenAction);
    if (qFileDialogUi->newFolderButton->isVisible()) {
        newFolderAction->setEnabled(qFileDialogUi->newFolderButton->isEnabled());
        menu.addAction(newFolderAction);
    }
    menu.exec(view->viewport()->mapToGlobal(position));
#endif // QT_NO_MENU
}

/*!
    \internal
*/
void QFileDialogPrivate::_q_renameCurrent()
{
    Q_Q(QFileDialog);
    QModelIndex index = qFileDialogUi->listView->currentIndex();
    index = index.sibling(index.row(), 0);
    if (q->viewMode() == QFileDialog::List)
        qFileDialogUi->listView->edit(index);
    else
        qFileDialogUi->treeView->edit(index);
}

bool QFileDialogPrivate::removeDirectory(const QString &path)
{
    QModelIndex modelIndex = model->index(path);
    return model->remove(modelIndex);
}

/*!
    \internal

    Deletes the currently selected item in the dialog.
*/
void QFileDialogPrivate::_q_deleteCurrent()
{
    if (model->isReadOnly())
        return;

    QModelIndexList list = qFileDialogUi->listView->selectionModel()->selectedRows();
    for (int i = list.count() - 1; i >= 0; --i) {
        QModelIndex index = list.at(i);
        if (index == qFileDialogUi->listView->rootIndex())
            continue;

        index = mapToSource(index.sibling(index.row(), 0));
        if (!index.isValid())
            continue;

    QString fileName = index.data(QFileSystemModel::FileNameRole).toString();
    QString filePath = index.data(QFileSystemModel::FilePathRole).toString();
    bool isDir = model->isDir(index);

    QFile::Permissions p(index.parent().data(QFileSystemModel::FilePermissions).toInt());
#ifndef QT_NO_MESSAGEBOX
    Q_Q(QFileDialog);
    if (!(p & QFile::WriteUser) && (QMessageBox::warning(q_func(), q_func()->windowTitle(),
                                QFileDialog::tr("'%1' is write protected.\nDo you want to delete it anyway?")
                                .arg(fileName),
                                 QMessageBox::Yes | QMessageBox::No, QMessageBox::No) == QMessageBox::No))
        return;
    else if (QMessageBox::warning(q_func(), q_func()->windowTitle(),
                                  QFileDialog::tr("Are sure you want to delete '%1'?")
                                  .arg(fileName),
                                  QMessageBox::Yes | QMessageBox::No, QMessageBox::No) == QMessageBox::No)
        return;

#else
    if (!(p & QFile::WriteUser))
        return;
#endif // QT_NO_MESSAGEBOX

        // the event loop has run, we can NOT reuse index because the model might have removed it.
        if (isDir) {
            if (!removeDirectory(filePath)) {
#ifndef QT_NO_MESSAGEBOX
            QMessageBox::warning(q, q->windowTitle(),
                                QFileDialog::tr("Could not delete directory."));
#endif
            }
        } else {
            model->remove(index);
        }
    }
}

void QFileDialogPrivate::_q_autoCompleteFileName(const QString &text)
{
    if (text.startsWith(QLatin1String("//")) || text.startsWith(QLatin1Char('\\'))) {
        qFileDialogUi->listView->selectionModel()->clearSelection();
        return;
    }

    QStringList multipleFiles = typedFiles();
    if (multipleFiles.count() > 0) {
        QModelIndexList oldFiles = qFileDialogUi->listView->selectionModel()->selectedRows();
        QModelIndexList newFiles;
        for (int i = 0; i < multipleFiles.count(); ++i) {
            QModelIndex idx = model->index(multipleFiles.at(i));
            if (oldFiles.contains(idx))
                oldFiles.removeAll(idx);
            else
                newFiles.append(idx);
        }
        for (int i = 0; i < newFiles.count(); ++i)
            select(newFiles.at(i));
        if (lineEdit()->hasFocus())
            for (int i = 0; i < oldFiles.count(); ++i)
                qFileDialogUi->listView->selectionModel()->select(oldFiles.at(i),
                    QItemSelectionModel::Toggle | QItemSelectionModel::Rows);
    }
}

/*!
    \internal
*/
void QFileDialogPrivate::_q_updateOkButton()
{
    Q_Q(QFileDialog);
    QPushButton *button =  qFileDialogUi->buttonBox->button((acceptMode == QFileDialog::AcceptOpen)
                    ? QDialogButtonBox::Open : QDialogButtonBox::Save);
    if (!button)
        return;

    bool enableButton = true;
    bool isOpenDirectory = false;

    QStringList files = q->selectedFiles();
    QString lineEditText = lineEdit()->text();

    if (lineEditText.startsWith(QLatin1String("//")) || lineEditText.startsWith(QLatin1Char('\\'))) {
        button->setEnabled(true);
        if (acceptMode == QFileDialog::AcceptSave)
            button->setText(acceptLabel);
        return;
    }

    if (files.isEmpty()) {
        enableButton = false;
    } else if (lineEditText == QLatin1String("..")) {
        isOpenDirectory = true;
    } else {
        switch (fileMode) {
        case QFileDialog::DirectoryOnly:
        case QFileDialog::Directory: {
            QString fn = files.first();
            QModelIndex idx = model->index(fn);
            if (!idx.isValid())
                idx = model->index(getEnvironmentVariable(fn));
            if (!idx.isValid() || !model->isDir(idx))
                enableButton = false;
            break;
        }
        case QFileDialog::AnyFile: {
            QString fn = files.first();
            QFileInfo info(fn);
            QModelIndex idx = model->index(fn);
            QString fileDir;
            QString fileName;
            if (info.isDir()) {
                fileDir = info.canonicalFilePath();
            } else {
                fileDir = fn.mid(0, fn.lastIndexOf(QLatin1Char('/')));
                fileName = fn.mid(fileDir.length() + 1);
            }
            if (lineEditText.contains(QLatin1String(".."))) {
                fileDir = info.canonicalFilePath();
                fileName = info.fileName();
            }

            if (fileDir == q->directory().canonicalPath() && fileName.isEmpty()) {
                enableButton = false;
                break;
            }
            if (idx.isValid() && model->isDir(idx)) {
                isOpenDirectory = true;
                enableButton = true;
                break;
            }
            if (!idx.isValid()) {
                int maxLength = maxNameLength(fileDir);
                enableButton = maxLength < 0 || fileName.length() <= maxLength;
            }
            break;
        }
        case QFileDialog::ExistingFile:
        case QFileDialog::ExistingFiles:
            for (int i = 0; i < files.count(); ++i) {
                QModelIndex idx = model->index(files.at(i));
                if (!idx.isValid())
                    idx = model->index(getEnvironmentVariable(files.at(i)));
                if (!idx.isValid()) {
                    enableButton = false;
                    break;
                }
                if (idx.isValid() && model->isDir(idx)) {
                    isOpenDirectory = true;
                    break;
                }
            }
            break;
        default:
            break;
        }
    }

    button->setEnabled(enableButton);
    if (acceptMode == QFileDialog::AcceptSave)
        button->setText(isOpenDirectory ? QFileDialog::tr("&Open") : acceptLabel);
}

/*!
    \internal
*/
void QFileDialogPrivate::_q_currentChanged(const QModelIndex &index)
{
    _q_updateOkButton();
    emit q_func()->currentChanged(index.data(QFileSystemModel::FilePathRole).toString());
}

/*!
    \internal

    This is called when the user double clicks on a file with the corresponding
    model item \a index.
*/
void QFileDialogPrivate::_q_enterDirectory(const QModelIndex &index)
{
    Q_Q(QFileDialog);
    // My Computer or a directory
    QModelIndex sourceIndex = index.model() == proxyModel ? mapToSource(index) : index;
    QString path = sourceIndex.data(QFileSystemModel::FilePathRole).toString();
    if (path.isEmpty() || model->isDir(sourceIndex)) {
        q->setDirectory(path);
        emit q->directoryEntered(path);
        if (fileMode == QFileDialog::Directory
                || fileMode == QFileDialog::DirectoryOnly) {
            // ### find out why you have to do both of these.
            lineEdit()->setText(QString());
            lineEdit()->clear();
        }
    } else {
        q->accept();
    }
}

/*!
    \internal

    Changes the file dialog's current directory to the one specified
    by \a path.
*/
void QFileDialogPrivate::_q_goToDirectory(const QString &path)
{
 #ifndef QT_NO_MESSAGEBOX
    Q_Q(QFileDialog);
#endif
    QModelIndex index = qFileDialogUi->lookInCombo->model()->index(qFileDialogUi->lookInCombo->currentIndex(),
                                                    qFileDialogUi->lookInCombo->modelColumn(),
                                                    qFileDialogUi->lookInCombo->rootModelIndex());
    QString path2 = path;
    if (!index.isValid())
        index = mapFromSource(model->index(getEnvironmentVariable(path)));
    else {
        path2 = index.data(UrlRole).toUrl().toLocalFile();
        index = mapFromSource(model->index(path2));
    }
    QDir dir(path2);
    if (!dir.exists())
        dir = getEnvironmentVariable(path2);

    if (dir.exists() || path2.isEmpty() || path2 == model->myComputer().toString()) {
        _q_enterDirectory(index);
#ifndef QT_NO_MESSAGEBOX
    } else {
        QString message = QFileDialog::tr("%1\nDirectory not found.\nPlease verify the "
                                          "correct directory name was given.");
        QMessageBox::warning(q, q->windowTitle(), message.arg(path2));
#endif // QT_NO_MESSAGEBOX
    }
}

// Makes a list of filters from a normal filter string "Image Files (*.png *.jpg)"
QStringList qt_clean_filter_list(const QString &filter)
{
    QRegExp regexp(QString::fromLatin1(qt_file_dialog_filter_reg_exp));
    QString f = filter;
    int i = regexp.indexIn(f);
    if (i >= 0)
        f = regexp.cap(2);
    return f.split(QLatin1Char(' '), QString::SkipEmptyParts);
}

/*!
    \internal

    Sets the current name filter to be nameFilter and
    update the qFileDialogUi->fileNameEdit when in AcceptSave mode with the new extension.
*/
void QFileDialogPrivate::_q_useNameFilter(int index)
{
    if (index == nameFilters.size()) {
        QAbstractItemModel *comboModel = qFileDialogUi->fileTypeCombo->model();
        nameFilters.append(comboModel->index(comboModel->rowCount() - 1, 0).data().toString());
    }

    QString nameFilter = nameFilters.at(index);
    QStringList newNameFilters = qt_clean_filter_list(nameFilter);
    if (acceptMode == QFileDialog::AcceptSave) {
        QString newNameFilterExtension;
        if (newNameFilters.count() > 0)
            newNameFilterExtension = QFileInfo(newNameFilters.at(0)).suffix();

        QString fileName = lineEdit()->text();
        const QString fileNameExtension = QFileInfo(fileName).suffix();
        if (!fileNameExtension.isEmpty() && !newNameFilterExtension.isEmpty()) {
            const int fileNameExtensionLength = fileNameExtension.count();
            fileName.replace(fileName.count() - fileNameExtensionLength,
                             fileNameExtensionLength, newNameFilterExtension);
            lineEdit()->setText(fileName);
        }
    }

    model->setNameFilters(newNameFilters);
}

/*!
    \internal

    This is called when the model index corresponding to the current file is changed
    from \a index to \a current.
*/
void QFileDialogPrivate::_q_selectionChanged()
{
    QModelIndexList indexes = qFileDialogUi->listView->selectionModel()->selectedRows();
    bool stripDirs = (fileMode != QFileDialog::DirectoryOnly && fileMode != QFileDialog::Directory);

    QStringList allFiles;
    for (int i = 0; i < indexes.count(); ++i) {
        if (stripDirs && model->isDir(mapToSource(indexes.at(i))))
            continue;
        allFiles.append(indexes.at(i).data().toString());
    }
    if (allFiles.count() > 1)
        for (int i = 0; i < allFiles.count(); ++i) {
            allFiles.replace(i, QString(QLatin1Char('"') + allFiles.at(i) + QLatin1Char('"')));
    }

    QString finalFiles = allFiles.join(QLatin1String(" "));
    if (!finalFiles.isEmpty() && !lineEdit()->hasFocus() && lineEdit()->isVisible())
        lineEdit()->setText(finalFiles);
    else
        _q_updateOkButton();
}

/*!
    \internal

    Includes hidden files and directories in the items displayed in the dialog.
*/
void QFileDialogPrivate::_q_showHidden()
{
    Q_Q(QFileDialog);
    QDir::Filters dirFilters = q->filter();
    if (showHiddenAction->isChecked())
        dirFilters |= QDir::Hidden;
    else
        dirFilters &= ~QDir::Hidden;
    q->setFilter(dirFilters);
}

/*!
    \internal

    When parent is root and rows have been inserted when none was there before
    then select the first one.
*/
void QFileDialogPrivate::_q_rowsInserted(const QModelIndex &parent)
{
    if (!qFileDialogUi->treeView
        || parent != qFileDialogUi->treeView->rootIndex()
        || !qFileDialogUi->treeView->selectionModel()
        || qFileDialogUi->treeView->selectionModel()->hasSelection()
        || qFileDialogUi->treeView->model()->rowCount(parent) == 0)
        return;
}

void QFileDialogPrivate::_q_fileRenamed(const QString &path, const QString oldName, const QString newName)
{
    if (fileMode == QFileDialog::Directory || fileMode == QFileDialog::DirectoryOnly) {
        if (path == rootPath() && lineEdit()->text() == oldName)
            lineEdit()->setText(newName);
    }
}

/*!
    \internal

    For the list and tree view watch keys to goto parent and back in the history

    returns true if handled
*/
bool QFileDialogPrivate::itemViewKeyboardEvent(QKeyEvent *event) {

    Q_Q(QFileDialog);
    switch (event->key()) {
    case Qt::Key_Backspace:
        _q_navigateToParent();
        return true;
    case Qt::Key_Back:
#ifdef QT_KEYPAD_NAVIGATION
        if (QApplication::keypadNavigationEnabled())
            return false;
#endif
    case Qt::Key_Left:
        if (event->key() == Qt::Key_Back || event->modifiers() == Qt::AltModifier) {
            _q_navigateBackward();
            return true;
        }
        break;
    case Qt::Key_Escape:
        q->hide();
        return true;
    default:
        break;
    }
    return false;
}

QString QFileDialogPrivate::getEnvironmentVariable(const QString &string)
{
#ifdef Q_OS_UNIX
    if (string.size() > 1 && string.startsWith(QLatin1Char('$'))) {
        return QString::fromLocal8Bit(getenv(string.mid(1).toLatin1().constData()));
    }
#else
    if (string.size() > 2 && string.startsWith(QLatin1Char('%')) && string.endsWith(QLatin1Char('%'))) {
        return QString::fromLocal8Bit(qgetenv(string.mid(1, string.size() - 2).toLatin1().constData()));
    }
#endif
    return string;
}

void QFileDialogComboBox::init(QFileDialogPrivate *d_pointer) {
    d_ptr = d_pointer;
    urlModel = new QUrlModel(this);
    urlModel->showFullPath = true;
    urlModel->setFileSystemModel(d_ptr->model);
    setModel(urlModel);
}

void QFileDialogComboBox::showPopup()
{
    if (model()->rowCount() > 1)
        QComboBox::showPopup();

    urlModel->setUrls(QList<QUrl>());
    QList<QUrl> list;
    QModelIndex idx = d_ptr->model->index(d_ptr->rootPath());
    while (idx.isValid()) {
        QUrl url = QUrl::fromLocalFile(idx.data(QFileSystemModel::FilePathRole).toString());
        if (url.isValid())
            list.append(url);
        idx = idx.parent();
    }
    // add "my computer"
    list.append(QUrl::fromLocalFile(QLatin1String("")));
    urlModel->addUrls(list, 0);
    idx = model()->index(model()->rowCount() - 1, 0);

    // append history
    QList<QUrl> urls;
    for (int i = 0; i < m_history.count(); ++i) {
        QUrl path = QUrl::fromLocalFile(m_history.at(i));
        if (!urls.contains(path))
            urls.prepend(path);
    }
    if (urls.count() > 0) {
        model()->insertRow(model()->rowCount());
        idx = model()->index(model()->rowCount()-1, 0);
        // ### TODO maybe add a horizontal line before this
        model()->setData(idx, QFileDialog::tr("Recent Places"));
        QStandardItemModel *m = qobject_cast<QStandardItemModel*>(model());
        if (m) {
            Qt::ItemFlags flags = m->flags(idx);
            flags &= ~Qt::ItemIsEnabled;
            m->item(idx.row(), idx.column())->setFlags(flags);
        }
        urlModel->addUrls(urls, -1, false);
    }
    setCurrentIndex(0);

    QComboBox::showPopup();
}

// Exact same as QComboBox::paintEvent(), except we elide the text.
void QFileDialogComboBox::paintEvent(QPaintEvent *)
{
    QStylePainter painter(this);
    painter.setPen(palette().color(QPalette::Text));

    // draw the combobox frame, focusrect and selected etc.
    QStyleOptionComboBox opt;
    initStyleOption(&opt);

    QRect editRect = style()->subControlRect(QStyle::CC_ComboBox, &opt,
                                                QStyle::SC_ComboBoxEditField, this);
    int size = editRect.width() - opt.iconSize.width() - 4;
    opt.currentText = opt.fontMetrics.elidedText(opt.currentText, Qt::ElideMiddle, size);
    painter.drawComplexControl(QStyle::CC_ComboBox, opt);

    // draw the icon and text
    painter.drawControl(QStyle::CE_ComboBoxLabel, opt);
}

QFileDialogListView::QFileDialogListView(QWidget *parent) : QListView(parent)
{
}

void QFileDialogListView::init(QFileDialogPrivate *d_pointer)
{
    d_ptr = d_pointer;
    setSelectionBehavior(QAbstractItemView::SelectRows);
    setWrapping(true);
    setResizeMode(QListView::Adjust);
    setEditTriggers(QAbstractItemView::EditKeyPressed);
    setContextMenuPolicy(Qt::CustomContextMenu);
#ifndef QT_NO_DRAGANDDROP
    setDragDropMode(QAbstractItemView::InternalMove);
#endif
}

QSize QFileDialogListView::sizeHint() const
{
    int height = qMax(10, sizeHintForRow(0));
    return QSize(QListView::sizeHint().width() * 2, height * 30);
}

void QFileDialogListView::keyPressEvent(QKeyEvent *e)
{
#ifdef QT_KEYPAD_NAVIGATION
    if (QApplication::navigationMode() == Qt::NavigationModeKeypadDirectional) {
        QListView::keyPressEvent(e);
        return;
    }
#endif // QT_KEYPAD_NAVIGATION

    if (!d_ptr->itemViewKeyboardEvent(e))
        QListView::keyPressEvent(e);
    e->accept();
}

QFileDialogTreeView::QFileDialogTreeView(QWidget *parent) : QTreeView(parent)
{
}

void QFileDialogTreeView::init(QFileDialogPrivate *d_pointer)
{
    d_ptr = d_pointer;
    setSelectionBehavior(QAbstractItemView::SelectRows);
    setRootIsDecorated(false);
    setItemsExpandable(false);
    setSortingEnabled(true);
    header()->setSortIndicator(0, Qt::AscendingOrder);
    header()->setStretchLastSection(false);
    setTextElideMode(Qt::ElideMiddle);
    setEditTriggers(QAbstractItemView::EditKeyPressed);
    setContextMenuPolicy(Qt::CustomContextMenu);
#ifndef QT_NO_DRAGANDDROP
    setDragDropMode(QAbstractItemView::InternalMove);
#endif
}

void QFileDialogTreeView::keyPressEvent(QKeyEvent *e)
{
#ifdef QT_KEYPAD_NAVIGATION
    if (QApplication::navigationMode() == Qt::NavigationModeKeypadDirectional) {
        QTreeView::keyPressEvent(e);
        return;
    }
#endif // QT_KEYPAD_NAVIGATION

    if (!d_ptr->itemViewKeyboardEvent(e))
        QTreeView::keyPressEvent(e);
    e->accept();
}

QSize QFileDialogTreeView::sizeHint() const
{
    int height = qMax(10, sizeHintForRow(0));
    QSize sizeHint = header()->sizeHint();
    return QSize(sizeHint.width() * 4, height * 30);
}

/*!
    // FIXME: this is a hack to avoid propagating key press events
    // to the dialog and from there to the "Ok" button
*/
void QFileDialogLineEdit::keyPressEvent(QKeyEvent *e)
{
#ifdef QT_KEYPAD_NAVIGATION
    if (QApplication::navigationMode() == Qt::NavigationModeKeypadDirectional) {
        QLineEdit::keyPressEvent(e);
        return;
    }
#endif // QT_KEYPAD_NAVIGATION

    int key = e->key();
    QLineEdit::keyPressEvent(e);
    if (key != Qt::Key_Escape)
        e->accept();
    if (hideOnEsc && (key == Qt::Key_Escape || key == Qt::Key_Return || key == Qt::Key_Enter)) {
        e->accept();
        hide();
        d_ptr->currentView()->setFocus(Qt::ShortcutFocusReason);
    }
}

#ifndef QT_NO_FSCOMPLETER

QString QFSCompleter::pathFromIndex(const QModelIndex &index) const
{
    const QFileSystemModel *dirModel;
    if (proxyModel)
        dirModel = qobject_cast<const QFileSystemModel *>(proxyModel->sourceModel());
    else
        dirModel = sourceModel;
    QString currentLocation = dirModel->rootPath();
    QString path = index.data(QFileSystemModel::FilePathRole).toString();
    if (!currentLocation.isEmpty() && path.startsWith(currentLocation)) {
#if defined(Q_OS_UNIX) || defined(Q_OS_WINCE)
        if (currentLocation == QDir::separator())
            return path.mid(currentLocation.length());
#endif
        return path.mid(currentLocation.length() + 1);
    }
    return index.data(QFileSystemModel::FilePathRole).toString();
}

QStringList QFSCompleter::splitPath(const QString &path) const
{
    if (path.isEmpty())
        return QStringList(completionPrefix());

    QString pathCopy = QDir::toNativeSeparators(path);
    QString sep = QDir::separator();
#if defined(Q_OS_SYMBIAN)
    if (pathCopy == QLatin1String("\\"))
        return QStringList(pathCopy);
#elif defined(Q_OS_WIN) || defined(Q_OS_OS2)
    if (pathCopy == QLatin1String("\\") || pathCopy == QLatin1String("\\\\"))
        return QStringList(pathCopy);
    QString doubleSlash(QLatin1String("\\\\"));
    if (pathCopy.startsWith(doubleSlash))
        pathCopy = pathCopy.mid(2);
    else
        doubleSlash.clear();
#endif

    QRegExp re(QLatin1Char('[') + QRegExp::escape(sep) + QLatin1Char(']'));

#if defined(Q_OS_SYMBIAN)
    QStringList parts = pathCopy.split(re, QString::SkipEmptyParts);
    if (pathCopy.endsWith(sep))
        parts.append(QString());
#elif defined(Q_OS_WIN) || defined(Q_OS_OS2)
    QStringList parts = pathCopy.split(re, QString::SkipEmptyParts);
    if (!doubleSlash.isEmpty() && !parts.isEmpty())
        parts[0].prepend(doubleSlash);
    if (pathCopy.endsWith(sep))
        parts.append(QString());
#else
    QStringList parts = pathCopy.split(re);
    if (path[0] == sep[0]) // read the "/" at the beginning as the split removed it
        parts[0] = sep[0];
#endif

#if defined(Q_OS_WIN) || defined(Q_OS_SYMBIAN) || defined(Q_OS_OS2)
    bool startsFromRoot = !parts.isEmpty() && parts[0].endsWith(QLatin1Char(':'));
#else
    bool startsFromRoot = path[0] == sep[0];
#endif
    if (parts.count() == 1 || (parts.count() > 1 && !startsFromRoot)) {
        const QFileSystemModel *dirModel;
        if (proxyModel)
            dirModel = qobject_cast<const QFileSystemModel *>(proxyModel->sourceModel());
        else
            dirModel = sourceModel;
        QString currentLocation = QDir::toNativeSeparators(dirModel->rootPath());
#if defined(Q_OS_WIN) || defined(Q_OS_SYMBIAN)
        if (currentLocation.endsWith(QLatin1Char(':')))
            currentLocation.append(sep);
#endif
        if (currentLocation.contains(sep) && path != currentLocation) {
            QStringList currentLocationList = splitPath(currentLocation);
            while (!currentLocationList.isEmpty()
                   && parts.count() > 0
                   && parts.at(0) == QLatin1String("..")) {
                parts.removeFirst();
                currentLocationList.removeLast();
            }
            if (!currentLocationList.isEmpty() && currentLocationList.last().isEmpty())
                currentLocationList.removeLast();
            return currentLocationList + parts;
        }
    }
    return parts;
}

#endif // QT_NO_COMPLETER

#ifdef QT3_SUPPORT
/*!
    Use selectedFiles() instead.

    \oldcode
       QString selected = dialog->selectedFile();
    \newcode
        QStringList files = dialog->selectedFiles();
        QString selected;
        if (!files.isEmpty())
            selected = files[0];
    \endcode
*/
QString QFileDialog::selectedFile() const
{
    QStringList files = selectedFiles();
    return files.size() ? files.at(0) : QString();
}

/*!
    \typedef QFileDialog::Mode

    Use QFileDialog::FileMode instead.
*/

/*!
    \fn void QFileDialog::setMode(FileMode m)

    Use setFileMode() instead.
*/

/*!
    \fn FileMode QFileDialog::mode() const

    Use fileMode() instead.
*/

/*!
    \fn void QFileDialog::setDir(const QString &directory)

    Use setDirectory() instead.
*/

/*!
    \fn void QFileDialog::setDir( const QDir &directory )

    Use setDirectory() instead.
*/

/*!
    \fn QStringList QFileDialog::getOpenFileNames(const QString &filter,
        const QString &dir, QWidget *parent, const char* name,
        const QString &caption, QString *selectedFilter, bool resolveSymlinks)

    Use the getOpenFileNames() overload that takes \a parent as the first
    argument instead.
*/

/*!
    \fn QString QFileDialog::getOpenFileName(const QString &dir,
        const QString &filter, QWidget *parent = 0, const char *name,
        const QString &caption, QString *selectedFilter, bool resolveSymlinks)

    Use the getOpenFileName() overload that takes \a parent as the first
    argument instead.
*/

/*!
    \fn QString QFileDialog::getSaveFileName(const QString &dir,
        const QString &filter, QWidget *parent, const char *name,
        const QString &caption, QString *selectedFilter, bool resolveSymlinks)

    Use the getSaveFileName() overload that takes \a parent as the first
    argument instead.
*/

/*!
    \fn QString QFileDialog::getExistingDirectory(const QString &dir,
        QWidget *parent, const char *name, const QString &caption,
        bool dirOnly, bool resolveSymlinks)

    Use the getExistingDirectory() overload that takes \a parent as
    the first argument instead.
*/

#endif // QT3_SUPPORT

QT_END_NAMESPACE

#include "moc_qfiledialog.cpp"

#endif // QT_NO_FILEDIALOG