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qfiledialog.cpp

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#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 "ui_qfiledialog.h"

/*
    \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 dialogs
  \mainclass

  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, these static functions will call the native
  Windows file dialog, and on Mac OS X these static function will call
  the native Mac OS X file dialog.

  \code
  fileName = QFileDialog::getOpenFileName(this,
      tr("Open Image"), "/home/jana", tr("Image Files (*.png *.jpg *.bmp)"));
  \endcode

  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:

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

  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:

  \code
  QFileDialog dialog(this);
  dialog.setFileMode(QFileDialog::AnyFile);
  \endcode

  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 setFilter() to set the dialog's file filter. For example:

  \code
  dialog.setFilter(tr("Images (*.png *.xpm *.jpg)"));
  \endcode

  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 setFilters(). Use selectFilter() 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():

  \code
  dialog.setViewMode(QFileDialog::Detail);
  \endcode

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

  \code
  QStringList fileNames;
  if (dialog.exec())
      fileNames = dialog.selectedFiles();
  \endcode

  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 DirectoryOnly  The name of a directory. The file dialog will only display directories.
    \value ExistingFiles  The names of zero or more existing files.

    \sa setFileMode()
*/

/*!
    \enum QFileDialog::Option

    \value ShowDirsOnly Only show directories in the file dialog. By default both files and
    directories are shown.
    \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 DontUseSheet Don't make the native file dialog a sheet. By default on Mac OS X, the
    native file dialog is made a sheet if it has a parent that can take a sheet.
    \value DontUseNativeDialog Don't use the native file dialog.  By default on Mac OS X and Windows,
    the native file dialog is used.
*/

/*!
  \enum QFileDialog::DialogLabel

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

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

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

    \sa currentChanged()
*/

/*!
    \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

#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

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

    Constructs a file dialog with the given \a parent and widget \a flags.
*/
00290 QFileDialog::QFileDialog(QWidget *parent, Qt::WindowFlags f)
    : QDialog(*new QFileDialogPrivate, parent, f)
{
    Q_D(QFileDialog);
    d->init();
}

/*!
    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.
*/
00304 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);
}

/*!
    \internal
*/
00317 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);
    setConfirmOverwrite(!(args.options & DontConfirmOverwrite));
    setResolveSymlinks(!(args.options & DontResolveSymlinks));
    selectFile(args.selection);
    d->lineEdit()->selectAll();
}

/*!
    Destroys the file dialog.
*/
00332 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
    delete d->qFileDialogUi;
}

/*!
    \since 4.3
    Sets the \a urls that are located in the sidebar
*/
00347 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
*/
00357 QList<QUrl> QFileDialog::sidebarUrls() const
{
    Q_D(const QFileDialog);
    return d->qFileDialogUi->sidebar->urls();
}

static const qint32 QFileDialogMagic = 0xbe;

/*!
    \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.
*/
00372 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 << directory().absolutePath();
    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
*/
00399 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);
    setHistory(history);
    setDirectory(currentDirectory);
    if (!d->qFileDialogUi->treeView->header()->restoreState(headerData))
        return false;
    setViewMode(ViewMode(viewMode));
    return true;
}

/*!
    \reimp
*/
00448 void QFileDialog::changeEvent(QEvent *e)
{
    Q_D(QFileDialog);
    if (e->type() == QEvent::LanguageChange) {
        d->retranslateWindowTitle();
        d->retranslateStrings();
    }
    QDialog::changeEvent(e);
}

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

void QFileDialogPrivate::retranslateStrings()
{
    Q_Q(QFileDialog);
    /* WIDGETS */
    if (defaultFileTypes)
        q->setFilter(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);
}

/*!
    \internal
    set the directory to url
*/
void QFileDialogPrivate::_q_goToUrl(const QUrl &url)
{
    QModelIndex idx = model->index(url.toLocalFile());
    _q_enterDirectory(idx);
}

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

    \overload
*/

/*!
    Sets the file dialog's current \a directory.
*/
00517 void QFileDialog::setDirectory(const QString &directory)
{
    Q_D(QFileDialog);
    if (d->rootPath() == directory)
        return;
    QModelIndex idx = d->model->index(directory);
#ifndef QT_NO_COMPLETER
    d->completer->setCompletionPrefix(directory);
#endif
    QModelIndex root = d->model->setRootPath(directory);
    d->qFileDialogUi->newFolderButton->setEnabled(d->model->flags(root) & Qt::ItemIsDropEnabled);
    d->setRootIndex(root);
    d->qFileDialogUi->listView->selectionModel()->clear();
}

/*!
    Returns the directory currently being displayed in the dialog.
*/
00535 QDir QFileDialog::directory() const
{
    Q_D(const QFileDialog);
    return QDir(d->rootPath());
}

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

    \sa selectedFiles()
*/
00546 void QFileDialog::selectFile(const QString &filename)
{
    Q_D(QFileDialog);
    if (filename.isEmpty())
        return;

    QModelIndex index = d->model->index(filename);
    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 (!d->lineEdit()->hasFocus())
            d->lineEdit()->setText(text);
    } else {
        d->qFileDialogUi->listView->selectionModel()->clear();
        if (!d->lineEdit()->hasFocus())
            d->lineEdit()->setText(index.data().toString());
    }
}

/**
    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('"'))) {
        // " 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
            QString name = toInternal(tokens.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;
            // a new filename
            if ((fileMode == QFileDialog::ExistingFiles) || files.isEmpty()) {
                if (info.isAbsolute())
                    files.append(name);
                else
                    files.append(toInternal(rootPath() + QDir::separator() + name));
            }
        }
    } else {
        QString name = editText;
        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
            files.append(toInternal(rootPath() + QDir::separator() + name));
    }
    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, selectedFiles() is an empty string list.

    \sa selectedFilter(), selectFile()
*/
00617 QStringList QFileDialog::selectedFiles() const
{
    Q_D(const QFileDialog);
    QModelIndexList indexes = d->qFileDialogUi->listView->selectionModel()->selectedRows();
    QStringList files;
    for (int i = 0; i < indexes.count(); ++i)
        files.append(d->model->filePath(d->mapToSource(indexes.at(i))));

    if (files.isEmpty())
        files = d->typedFiles();

    if (files.isEmpty() && d->fileMode == DirectoryOnly)
        files.append(d->model->filePath(d->rootIndex()));

    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);
}

/*!
    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 semicolons, then only the
    text contained in the parentheses is used as the filter. This means
    that these calls are all equivalent:

    \code
       dialog.setFilter("All C++ files (*.cpp;*.cc;*.C;*.cxx;*.c++)");
       dialog.setFilter("*.cpp;*.cc;*.C;*.cxx;*.c++");
    \endcode

    \sa setFilters()
*/
00672 void QFileDialog::setFilter(const QString &filter)
{
    setFilters(qt_make_filter_list(filter));
}

/*!
    Sets the \a filters used in the file dialog.

    \code
      QStringList filters;
      filters << "Image files (*.png *.xpm *.jpg)"
              << "Text files (*.txt)"
              << "Any files (*)";

      QFileDialog dialog(this);
      dialog.setFilters(filters);
      dialog.exec();
    \endcode
*/
00691 void QFileDialog::setFilters(const QStringList &filters)
{
    Q_D(QFileDialog);
    d->defaultFileTypes = (filters == QStringList(QFileDialog::tr("All Files (*)")));
    d->qFileDialogUi->fileTypeCombo->clear();
    if (filters.isEmpty())
        return;
    d->qFileDialogUi->fileTypeCombo->addItems(filters);
    d->_q_useNameFilter(filters.first());
}

/*!
    Returns the file type filters that are in operation on this file
    dialog.
*/
00706 QStringList QFileDialog::filters() const
{
    Q_D(const QFileDialog);
    QStringList items;
    for (int i = 0; i < d->qFileDialogUi->fileTypeCombo->count(); ++i)
        items.append(d->qFileDialogUi->fileTypeCombo->itemText(i));
    return items;
}

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

    \sa setFilter(), setFilters(), selectedFilter()
*/
00721 void QFileDialog::selectFilter(const QString &filter)
{
    Q_D(QFileDialog);
    int i = d->qFileDialogUi->fileTypeCombo->findText(filter);
    if (i >= 0) {
        d->qFileDialogUi->fileTypeCombo->setCurrentIndex(i);
        d->_q_useNameFilter(d->qFileDialogUi->fileTypeCombo->currentText());
    }
}

/*!
    Returns the filter that the user selected in the file dialog.

    \sa selectedFiles()
*/
00736 QString QFileDialog::selectedFilter() const
{
    Q_D(const QFileDialog);
    return d->qFileDialogUi->fileTypeCombo->currentText();
}

/*!
    \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.

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

    // 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
    QDir::Filters filters = d->filterForMode(mode);
    d->model->setFilter(filters);
    // 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);
        setLabelText(FileName, tr("Directory:"));
        buttonText = tr("&Choose");
    } else {
        setLabelText(FileName, tr("File &name:"));
    }
    setLabelText(Accept, buttonText);
    d->qFileDialogUi->fileTypeCombo->setEnabled(mode != DirectoryOnly);
    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.

    \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);
    }
}


/*
    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()->select(idx,
            QItemSelectionModel::Select | QItemSelectionModel::Rows);
    return idx;
}

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

/*!
    \property QFileDialog::readOnly
    \brief Whether the filedialog is readonly.

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

    The default value is false.
*/
void QFileDialog::setReadOnly(bool disabled)
{
    Q_D(QFileDialog);
    d->model->setReadOnly(disabled);
    if (disabled) {
        d->qFileDialogUi->newFolderButton->setEnabled(false);
        d->renameAction->setEnabled(false);
        d->deleteAction->setEnabled(false);
    }
}

bool QFileDialog::isReadOnly() const
{
    Q_D(const QFileDialog);
    return d->model->isReadOnly();
}

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

    If this property is set to true, the file dialog will resolve
    shortcuts.
*/
void QFileDialog::setResolveSymlinks(bool enabled)
{
    Q_D(QFileDialog);
    d->model->setResolveSymlinks(enabled);
}

bool QFileDialog::resolveSymlinks() const
{
    Q_D(const QFileDialog);
    return d->model->resolveSymlinks();
}

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

    If this property is set to true and the accept mode is
    AcceptSave, the filedialog will ask whether the user wants to
    overwrite the file before accepting the file.
*/
void QFileDialog::setConfirmOverwrite(bool enabled)
{
    Q_D(QFileDialog);
    d->confirmOverwrite = enabled;
}

bool QFileDialog::confirmOverwrite() const
{
    Q_D(const QFileDialog);
    return d->confirmOverwrite;
}

/*!
    \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.
*/
00980 void QFileDialog::setHistory(const QStringList &paths)
{
    Q_D(QFileDialog);
    d->history = paths;

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

    // ### append history
    QList<QUrl> urls;
    for (int i = 0; i < d->history.count(); ++i) {
        QUrl path = QUrl::fromLocalFile(d->history.at(i));
        if (!urls.contains(path))
            urls += path;
    }
    if (urls.count() > 0) {
        d->qFileDialogUi->lookInCombo->model()->insertRow(d->qFileDialogUi->lookInCombo->model()->rowCount());
        idx = d->qFileDialogUi->lookInCombo->model()->index(d->qFileDialogUi->lookInCombo->model()->rowCount()-1, 0);
        // ### TODO disable this item and maybe add a horizontal line before it
        d->qFileDialogUi->lookInCombo->model()->setData(idx, QLatin1String("Recent Places"));
        QStandardItemModel *m = qobject_cast<QStandardItemModel*>(d->qFileDialogUi->lookInCombo->model());
        if (m) {
            Qt::ItemFlags flags = m->flags(idx);
            flags &= ~Qt::ItemIsEnabled;
            m->item(idx.row(), idx.column())->setFlags(flags);
        }
        d->urlModel->addUrls(urls, -1, false);
    }
    d->qFileDialogUi->lookInCombo->setCurrentIndex(0);
}

/*!
    \brief returns the browsing history of the filedialog as a list of paths.
*/
01025 QStringList QFileDialog::history() const
{
    Q_D(const QFileDialog);
    QStringList currentHistory = d->history;
    QString newHistory = d->model->filePath(d->rootIndex());
    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.
*/
01044 void QFileDialog::setItemDelegate(QAbstractItemDelegate *delegate)
{
    Q_D(QFileDialog);
    d->qFileDialogUi->listView->setItemDelegate(delegate);
    d->qFileDialogUi->treeView->setItemDelegate(delegate);
}

/*!
    \brief returns the item delegate used to render the items in the views in
  the filedialog
*/
01055 QAbstractItemDelegate *QFileDialog::itemDelegate() const
{
    Q_D(const QFileDialog);
    return d->qFileDialogUi->listView->itemDelegate();
}

/*!
    \brief set the icon provider used by the filedialog to the specified
    \a provider
*/
01065 void QFileDialog::setIconProvider(QFileIconProvider *provider)
{
    Q_D(QFileDialog);
    d->model->setIconProvider(provider);
}

/*!
    \brief returns the icon provider used by the filedialog.
*/
01074 QFileIconProvider *QFileDialog::iconProvider() const
{
    Q_D(const QFileDialog);
    return d->model->iconProvider();
}

/*!
    \brief set the \a text shown in the filedialog in the specified \a label
*/
01083 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);
        break;
    case FileType:
        d->qFileDialogUi->fileTypeLabel->setText(text);
        break;
    case Accept:
        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;
    }
}

/*!
    \brief returns the text shown in the filedialog in the specified \a label
*/
01116 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);

#elif defined(Q_WS_MAC)
extern QStringList qt_mac_get_open_file_names(const QFileDialogArgs &args,
                                              QString *pwd,
                                              QString *selectedFilter);

extern QString qt_mac_get_save_file_name(const QFileDialogArgs &args,
                                         QString *pwd,
                                         QString *selectedFilter);
#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.

  \code
    QString fileName = QFileDialog::getOpenFileName(this, tr("Open File"),
                                                    "/home",
                                                    tr("Images (*.png *.xpm *.jpg)"));
  \endcode

  The function creates a modal file dialog with the given \a parent widget.
  If the 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. 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.

  Under Windows and Mac OS X, this static function will use the native
  file dialog and not a QFileDialog. On Mac OS X, the \a dir argument
  is ignored, the native dialog always displays the last visited directory.

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

  Under 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.

  \sa getOpenFileNames(), getSaveFileName(), getExistingDirectory()
*/
01213 QString QFileDialog::getOpenFileName(QWidget *parent,
                               const QString &caption,
                               const QString &dir,
                               const QString &filter,
                               QString *selectedFilter,
                               Options options)
{
    if (qt_filedialog_open_filename_hook)
        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);
    }
#elif defined(Q_WS_MAC)
    if (qt_use_native_dialogs && !(args.options & DontUseNativeDialog)) {
        QStringList files = qt_mac_get_open_file_names(args, &(args.directory), selectedFilter);
        if (!files.isEmpty())
            return files.first().normalized(QString::NormalizationForm_C);
        return QString();
    }
#endif

    // create a qt dialog
    QFileDialog dialog(args);
    if (selectedFilter)
        dialog.selectFilter(*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.

  \code
    QStringList files = QFileDialog::getOpenFileNames(
                            this,
                            "Select one or more files to open",
                            "/home",
                            "Images (*.png *.xpm *.jpg)");
  \endcode

  This function creates a modal file dialog with the given \a parent
  widget. If the 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.

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

  Under Windows and Mac OS X, this static function will use the native
  file dialog and not a QFileDialog. On Mac OS X, the \a dir argument
  is ignored, the native dialog always displays the last visited directory.

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

  Under 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 that if you want to iterate over the list of files, you should
  iterate over a copy. For example:

    \code
    QStringList list = files;
    QStringList::Iterator it = list.begin();
    while(it != list.end()) {
        myProcessing(*it);
        ++it;
    }
    \endcode

  \sa getOpenFileName(), getSaveFileName(), getExistingDirectory()
*/
01309 QStringList QFileDialog::getOpenFileNames(QWidget *parent,
                                    const QString &caption,
                                    const QString &dir,
                                    const QString &filter,
                                    QString *selectedFilter,
                                    Options options)
{
    if (qt_filedialog_open_filenames_hook)
        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);
    }
#elif defined(Q_WS_MAC)
    if (qt_use_native_dialogs && !(args.options & DontUseNativeDialog)) {
        QStringList files = qt_mac_get_open_file_names(args, &(args.directory), selectedFilter);
        for (int i = 0; i < files.count(); ++i)
            files.replace(i, files.at(i).normalized(QString::NormalizationForm_C));
        return files;
    }
#endif

    // create a qt dialog
    QFileDialog dialog(args);
    if (selectedFilter)
        dialog.selectFilter(*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 the
  parent is not 0, the dialog will be shown centered over the parent
  widget.

  \code
    QString fileName = QFileDialog::getSaveFileName(this, tr("Save File"),
                               "/home/jana/untitled.png",
                               tr("Images (*.png *.xpm *.jpg)"));
  \endcode

  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. 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 then a default caption will be used.

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

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

  Under 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.

  \sa getOpenFileName(), getOpenFileNames(), getExistingDirectory()
*/
01395 QString QFileDialog::getSaveFileName(QWidget *parent,
                               const QString &caption,
                               const QString &dir,
                               const QString &filter,
                               QString *selectedFilter,
                               Options options)
{
    if (qt_filedialog_save_filename_hook)
        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);
    }
#elif defined(Q_WS_MAC)
    if (qt_use_native_dialogs && !(args.options & DontUseNativeDialog)) {
        QString result = qt_mac_get_save_file_name(args, &(args.directory), selectedFilter);
        return result.normalized(QString::NormalizationForm_C);
    }
#endif

    // create a qt dialog
    QFileDialog dialog(args);
    dialog.setAcceptMode(AcceptSave);
    if (selectedFilter)
        dialog.selectFilter(*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.

  \code
    QString dir = QFileDialog::getExistingDirectory(this, tr("Open Directory"),
                                                    "/home",
                                                    QFileDialog::ShowDirsOnly
                                                    | QFileDialog::DontResolveSymlinks);
  \endcode

  This function creates a modal file dialog with the given \a parent
  widget. If the 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.

  Under Windows and Mac OS X, this static function will use the native
  file dialog and not a QFileDialog. On Mac OS X, the \a dir argument
  is ignored, the native dialog always displays the last visited directory.

  Under 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.

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

  \sa getOpenFileName(), getOpenFileNames(), getSaveFileName()
*/
01476 QString QFileDialog::getExistingDirectory(QWidget *parent,
                                    const QString &caption,
                                    const QString &dir,
                                    Options options)
{
    if (qt_filedialog_existing_directory_hook)
        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)) {
        return qt_win_get_existing_directory(args);
    }
#elif defined(Q_WS_MAC)
    if (qt_use_native_dialogs && !(args.options & DontUseNativeDialog)) {
        QStringList files = qt_mac_get_open_file_names(args, 0, 0);
        if (!files.isEmpty())
            return files.first().normalized(QString::NormalizationForm_C);
        return QString();
    }
#endif

    // create a qt dialog
    QFileDialog dialog(args);
    if (dialog.exec() == QDialog::Accepted) {
        QString result = dialog.selectedFiles().value(0);
        if (!result.isEmpty() && result.right(1) != QLatin1String("/"))
            result += QLatin1Char('/');
        return result;
    }
    return QString();
}

/*
    Get the initial directory path

    \sa initialSelection()
 */
QString QFileDialogPrivate::workingDirectory(const QString &path)
{
    if (!path.isEmpty()) {
        QFileInfo info(path);
        if (info.exists() && info.isDir())
            return info.absoluteFilePath();
        return info.absolutePath();
    }
    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
*/
01550 void QFileDialog::done(int result)
{
    QDialog::done(result);
}

/*!
 \reimp
*/
01558 void QFileDialog::accept()
{
    Q_D(QFileDialog);
    QStringList files = selectedFiles();
    if (files.isEmpty())
        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()) {
            emit filesSelected(files);
            QDialog::accept();
        }
        return;
    }

    case AnyFile: {
        QString fn = files.first();
        QFileInfo info(fn);
        if (info.isDir()) {
            setDirectory(info.absoluteFilePath());
            d->lineEdit()->clear();
            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) {
            emit filesSelected(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) {
                emit filesSelected(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;
            }
        }
        emit filesSelected(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"));
    q->restoreState(settings.value(QLatin1String("filedialog")).toByteArray());
#endif

    // Default case
    if (!nameFilter.isEmpty())
        q->setFilter(nameFilter);
    q->setAcceptMode(QFileDialog::AcceptOpen);
    q->setDirectory(workingDirectory(directory));
    q->selectFile(initialSelection(directory));

    qFileDialogUi->fileNameEdit->setFocus();

    _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
    QFileDialog::connect(model, SIGNAL(rootPathChanged(const QString &)),
            q, SLOT(_q_pathChanged(const QString &)));
    QFileDialog::connect(model, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
            q, SLOT(_q_rowsInserted(const QModelIndex &)));
    model->setReadOnly(false);

    qFileDialogUi = 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(const QUrl &)),
                         q, SLOT(_q_goToUrl(const QUrl &)));

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

    urlModel = new QUrlModel(q);
    urlModel->showFullPath = true;
    urlModel->setFileSystemModel(model);
    qFileDialogUi->lookInCombo->setModel(urlModel);
    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_COMPLETER
    completer = new QFSCompletor(model, q);
    qFileDialogUi->fileNameEdit->setCompleter(completer);
    QObject::connect(qFileDialogUi->fileNameEdit, SIGNAL(textChanged(QString)),
            q, SLOT(_q_autoCompleteFileName(QString)));
#endif // QT_NO_COMPLETER
    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(const QString &)),
                     q, SLOT(_q_useNameFilter(const QString &)));
    QObject::connect(qFileDialogUi->fileTypeCombo, SIGNAL(activated(const QString &)),
                     q, SIGNAL(filterSelected(const 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);
    }

    QItemSelectionModel *selModel = qFileDialogUi->treeView->selectionModel();
    qFileDialogUi->treeView->setSelectionModel(qFileDialogUi->listView->selectionModel());
    delete selModel;
    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(const QItemSelection &, const 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()
*/
01846 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(const QModelIndex &, int, int)),
            this, SLOT(_q_rowsInserted(const QModelIndex &)));
    } else {
        disconnect(d->model, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
            this, SLOT(_q_rowsInserted(const 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);
        connect(d->proxyModel, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
            this, SLOT(_q_rowsInserted(const QModelIndex &)));
    } else {
        d->proxyModel = 0;
        d->qFileDialogUi->listView->setModel(d->model);
        d->qFileDialogUi->treeView->setModel(d->model);
        connect(d->model, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
            this, SLOT(_q_rowsInserted(const QModelIndex &)));
    }
    QItemSelectionModel *selModel = d->qFileDialogUi->treeView->selectionModel();
    d->qFileDialogUi->treeView->setSelectionModel(d->qFileDialogUi->listView->selectionModel());
    delete selModel;
    d->setRootIndex(idx);

    // reconnect selection
    QItemSelectionModel *selections = d->qFileDialogUi->listView->selectionModel();
    QObject::connect(selections, SIGNAL(selectionChanged(const QItemSelection &, const 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()
*/
01895 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));
    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));
    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));
    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));
    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));
    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));
    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(history);

    if (currentHistoryLocation < 0 || currentHistory.value(currentHistoryLocation) != newPath) {
        while (currentHistoryLocation >= 0 && currentHistoryLocation + 1 < currentHistory.count()) {
            currentHistory.removeLast();
        }
        currentHistory.append(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());
    if (dir.isRoot()) {
        q->setDirectory(model->myComputer().toString());
    } else {
        dir.cdUp();
        q->setDirectory(dir.absolutePath());
    }
}

/*!
    \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->listView->doItemsLayout();
    qFileDialogUi->stackedWidget->setCurrentWidget(qFileDialogUi->listView->parentWidget());
}

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

/*!
    \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
        renameAction->setEnabled(model->permissions(index.parent()) & QFile::WriteUser);
        menu.addAction(renameAction);
        deleteAction->setEnabled(model->permissions(index.parent()) & 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);
}

/*!
    \internal

    Deletes the currently selected item in the dialog.
*/
void QFileDialogPrivate::_q_deleteCurrent()
{
    QModelIndex index = qFileDialogUi->listView->currentIndex();
    if (index == qFileDialogUi->listView->rootIndex())
        return;
    index = mapToSource(index.sibling(index.row(), 0));
    if (!index.isValid() || model->isReadOnly())
        return;

    QString fileName = model->fileName(index);
    QString filePath = model->filePath(index);
    bool isDir = model->isDir(index);

#ifndef QT_NO_MESSAGEBOX
    Q_Q(QFileDialog);
    if (!model->fileInfo(index).isWritable()
        && (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 (!model->fileInfo(index).isWritable())
        return;
#endif // QT_NO_MESSAGEBOX

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

void QFileDialogPrivate::_q_autoCompleteFileName(const QString &text) {
    QModelIndex idx;

    // text might contain the full path so try both
    idx = mapFromSource(model->index(text));
    if (!idx.isValid())
        idx = mapFromSource(model->index(rootPath() + QDir::separator() + text));

    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;
    QModelIndex index = mapToSource(qFileDialogUi->treeView->currentIndex());
    if (!index.isValid())
        index = mapToSource(qFileDialogUi->treeView->selectionModel()->selectedIndexes().value(0));

    switch (fileMode) {
    case QFileDialog::DirectoryOnly:
    case QFileDialog::Directory:
        button->setEnabled(model->isDir(index) || !index.isValid());
        break;
    case QFileDialog::ExistingFile:
    case QFileDialog::ExistingFiles:
        button->setEnabled(!model->isDir(index) && index.isValid());
        break;
    case QFileDialog::AnyFile: {
        QStringList files = q->selectedFiles();
        bool enableButton = !files.isEmpty();
        // make sure the typed in names are not too long for the file system
        if (enableButton) {
            QString lastDirectory;
            int maxLength = -1;
            bool emptyFileName = true;
            for (int i = 0; i < files.count(); ++i) {
                QString base = basename(files.at(i));
                QString directory = files.at(i).left(files.at(i).count() - base.count());
                if (directory != lastDirectory) {
                    lastDirectory = directory;
                    maxLength = maxNameLength(lastDirectory);
                }
                QString baseName = basename(files.at(i));
                if (!baseName.isEmpty())
                    emptyFileName = false;
                if (maxLength < 0)
                    break;
                if (baseName.length() > maxLength) {
                    enableButton = false;
                    break;
                }
            }
            if (emptyFileName)
                enableButton = false;
        }
        button->setEnabled(enableButton);
        break;
    }
    default:
        button->setEnabled(false);
    }
}

/*!
    \internal
*/
void QFileDialogPrivate::_q_currentChanged(const QModelIndex &index)
{
    _q_updateOkButton();
    emit q_func()->currentChanged(model->filePath(mapToSource(index)));
}

/*!
    \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 = mapToSource(index);
    QString path = model->filePath(sourceIndex);
    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
    }
}

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

// Makes a list of filters from a normal filter string "Image Files (*.png *.jpg)"
static 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(const QString &nameFilter)
{
    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);
}

/*!
    \internal

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

/*!
    \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) {
    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;
    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;
}

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::DragOnly);
#endif
}

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

void QFileDialogListView::keyPressEvent(QKeyEvent *e)
{
    if (d_ptr->itemViewKeyboardEvent(e)) {
        e->accept();
    } else {
        QListView::keyPressEvent(e);
    }
}

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::DragOnly);
#endif
}

void QFileDialogTreeView::keyPressEvent(QKeyEvent *e)
{
    if (d_ptr->itemViewKeyboardEvent(e)) {
        e->accept();
    } else {
        QTreeView::keyPressEvent(e);
    }
}

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)
{
    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_COMPLETER

02608 QString QFSCompletor::pathFromIndex(const QModelIndex &index) const
{
    const QFileSystemModel *dirModel = static_cast<const QFileSystemModel *>(model());
    QString currentLocation = dirModel->rootPath();
    QString path = dirModel->filePath(index);
    if (path.startsWith(currentLocation)) {
        return path.mid(currentLocation.length() + 1);
    }
    return dirModel->filePath(index);
}

02619 QStringList QFSCompletor::splitPath(const QString &path) const
{
    if (path.isEmpty())
        return QStringList(completionPrefix());

    QString pathCopy = QDir::toNativeSeparators(path);
    QString sep = QDir::separator();
#ifdef Q_OS_WIN
    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(QLatin1String("[") + QRegExp::escape(sep) + QLatin1String("]"));

#ifdef Q_OS_WIN
    QStringList parts = pathCopy.split(re, QString::SkipEmptyParts);
    if (!doubleSlash.isEmpty())
        parts[0].prepend(doubleSlash);
#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 (parts.count() == 1 || (parts.count() > 1 && path[0] != sep[0])) {
        const QFileSystemModel *dirModel = static_cast<const QFileSystemModel *>(model());
        QString currentLocation = QDir::toNativeSeparators(dirModel->rootPath());
        if (currentLocation.contains(sep) && path != currentLocation) {
            QStringList currentLocationList = splitPath(currentLocation);
            while (!currentLocationList.isEmpty()
                   && parts.count() > 0
                   && parts.at(0) == QLatin1String("..")) {
                parts.removeFirst();
                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

#include "moc_qfiledialog.cpp"

#endif

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